CN105000745A - Sulfur gas field produced water treatment system - Google Patents
Sulfur gas field produced water treatment system Download PDFInfo
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- CN105000745A CN105000745A CN201510553356.2A CN201510553356A CN105000745A CN 105000745 A CN105000745 A CN 105000745A CN 201510553356 A CN201510553356 A CN 201510553356A CN 105000745 A CN105000745 A CN 105000745A
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Abstract
The invention discloses a sulfur gas field produced water treatment system which comprises a nature gas stripping tower, an integrated sulfuretted hydrogen stripping device, an air sweetening tower, a pre-evaporator, an ammonia nitrogen stripping device, a multi-effect evaporator, an electrolytic catalysis oxidation device and a crystallizer, wherein the nature gas stripping tower is connected onto the sulfuretted hydrogen stripping device through a pipe, the integrated sulfuretted hydrogen stripping device is connected with the air sweetening tower through a pipe, the integrated sulfuretted hydrogen stripping device is connected with the pre-evaporator through a pipe, the pre-evaporator is connected with the multi-effect evaporator through a pipe, the pre-evaporator is connected with the ammonia nitrogen stripping device through a pipe, the multi-effect evaporator is connected with the electrolytic catalysis oxidation device through a pipe, the multi-effect evaporator is connected with the crystallizer through a pipe, the crystallizer is connected with the electrolytic catalysis oxidation device through a pipe, and the electrolytic catalysis oxidation device is connected with the integrated sulfuretted hydrogen stripping device through a pipe. According to the system, most part of substances in the produced water of a sulfur gas field can be fully recycled, zero release is realized, and surrounding environment cannot be polluted.
Description
Technical field
The invention belongs to Natural gas extraction field, particularly relate to the treatment system of the stratum recovered water taken out of in sulfur Gas Fields recovery process.
Background technology
Sulfur Gas Fields can produce the recovered water taking stratum out of in the process of exploitation.The technology that the recovered water of sulfur Gas Fields mainly adopts at present is re-injection after pre-treatment, but reinjection technology mode has certain limitation, the gas field recovered water in not all area is all applicable to using the method process, as Sichuan Basin western sichuan region, because stratum is fine and close and complicated hydrogeological conditions, the re-injection of recovered water is extremely restricted.Need in re-injection preprocessing process to add a large amount of chemical oxidating chemicals and flocculation agent, not only cost is very high, the oxygenant added is usually containing heavy metal, cause the increase of sewage and Of Heavy Metal Level In Sludge, the more important thing is the resource utilization that can not realize waste water, in addition re-injection process, if Project Realization is bad, easily cause groundwater pollution, some local environmental administrations have forbidden the non-same layer re-injection of sewage.
Publication number is CN103214139A, publication date is that the Chinese invention patent application on July 24th, 2013 discloses a kind of gas production wastewater comprehensive treatment technique, solve existing waste water treatment process and thoroughly cannot remove hydrogen sulfide, stench in gas production waste water, and the problem of the utilization of resources cannot be realized.The present invention includes following treatment process: desulfurizing and purifying pre-treatment, four-effect evaporation crystallization treatment, tail gas deodorization process.By three waste water treatment process, solve the up to standard process of the current high sulfur-bearing height saliferous existed containing organic gas production waste water, and this invention processing technological flow is reasonable, compact equipment installation, floor space is little, and convenient and other process matchings use; Investment cost is few in addition, working cost is low, comprehensive energy consumption is low, and environmental benefit and social benefit are obviously better than other technical scheme.The method first uses chemical oxidization method desulfurization, then by multiple-effect evaporation salt manufacturing, only recycles inorganic salt in waste water, do not recycle hydrogen sulfide in waste water, still adopts the method adding a large amount of chemical agent to process.Technique does not have the treatment technology of mother liquor in evaporative process, does not carry out advanced treatment to distilled water, and waste water there is no method and realizes recycling.
Publication number is CN103304104A, publication date is the novel process that the Chinese invention patent application on September 18th, 2013 discloses the production waste water zero release of a kind of natural gas field, comprise the steps: the sewage in gas field to be divided into normal production waste, sanitary sewage, maintenance sewage, accident waste liquid, rainwater, factory effluent and gas-field water, collect respectively; Then normal production waste, sanitary sewage, maintenance sewage, accident waste liquid and early-stage rainwater are introduced biochemical treatment unit, factory effluent introduces electrodialysis process unit, and gas-field water introduces gas-field water pretreatment unit; Gas-field water after the dense water produced after the permitted discharge that after biochemical treatment cell processing, non-reuse is complete, electrodialysis process cell processing and the process of gas-field water pretreatment unit all enters evaporative crystallization unit and carries out advanced treatment, after water quality reaching standard, reuse is other water of productive use in recirculated cooling water make up water or gas field, pollutent is separated out from sewage with the form of crystal salt, landfill stabilization or recycling are carried out to crystal salt, finally realizes sewage zero-discharge.This patent application does not relate to the process of sour gas water in field, be only applicable to non-sour gas water in field, also do not have the treatment process of mother liquid evaporation in this patent, do not have the treatment process of the ammonia nitrogen contained in gas production waste water, this patent is difficult to realize zero release to the gas production waste water containing ammonia nitrogen.
Summary of the invention
The process existed in order to the method overcoming above-mentioned existing process sulfur Gas Fields recovered water is not comprehensive, recovered water cannot be realized comprehensively recyle and zero release, the invention provides a kind of sulfur Gas Fields produced water disposal system, by the effect of this treatment process, the most of material in sulfur Gas Fields recovered water can be reclaimed comprehensively, realize zero release, do not pollute the environment of surrounding.
The present invention for solving the problems of the technologies described above adopted technical scheme is:
A kind of sulfur Gas Fields produced water disposal system, it is characterized in that: comprise Sweet natural gas stripping tower, integration hydrogen sulfide stripping device, air sweetening tower, preevaporator, ammonia nitrogen blowing-off device, multiple-effect evaporator, electrolysis-catalytic oxidation device and crystallizer, described Sweet natural gas stripping tower is connected on hydrogen sulfide stripping device by pipeline, described integrated hydrogen sulfide stripping device is connected with air sweetening tower by pipeline, described integrated hydrogen sulfide stripping device is connected with preevaporator by pipeline, described preevaporator is connected with multiple-effect evaporator by pipeline, described preevaporator is connected with ammonia nitrogen blowing-off device by pipeline, described multiple-effect evaporator is connected with electrolysis-catalytic oxidation device by pipeline, described multiple-effect evaporator is connected with crystallizer by pipeline, described crystallizer is connected with electrolysis-catalytic oxidation device by pipeline, described electrolysis-catalytic oxidation device is connected with integrated hydrogen sulfide stripping device by pipeline.
Described a kind of sulfur Gas Fields produced water disposal system, also comprise integrated coagulation and filtration device, integrated coagulation and filtration device is connected on the pipeline between integrated hydrogen sulfide stripping device and preevaporator.
Described ammonia nitrogen blowing-off device comprises stripping tank, off gas treatment tank and pump, described stripping tank is provided with inlet pipe, water inlet pipe, evacuated tube and rising pipe, described inlet pipe is between water inlet pipe and rising pipe, water inlet pipe is positioned at below rising pipe, aeration head is provided with in described stripping tank, aeration head is connected with inlet pipe, described stripping pot bottom is provided with well heater, described stripping tank top is provided with effuser, the other end of effuser is positioned at off gas treatment tank, the water-in of described pump is connected to the bottom of off gas treatment tank, the water outlet of described pump is connected with water pipe, the other end of water pipe is connected with water distributor, water distributor is positioned at the top of off gas treatment tank.
Described stripping tank is also provided with sight glass and glass-tube liquid level, sight glass is arranged on the medium position of stripping tank, extend into the bottom position of stripping tank bottom glass-tube liquid level, and glass-tube liquid level top extend into the tip position of stripping tank.
Described stripping tank is provided with thermal insulation layer.
Be provided with two porous plates in described off gas treatment tank, between two porous plates, be filled with filler.
Described electrolysis-catalytic oxidation device comprises direct supply, electrode and electrolytic reaction groove, electrode is inserted in electrolytic reaction groove, direct supply is connected with electrode, electrolytic reaction groove is for loading mother liquor, electrolytic reaction groove is provided with air outlet, fluid inlet, clorox outlet and liquid outlet, air outlet is arranged on electrolytic reaction groove top, and liquid outlet is arranged on electrolytic reaction trench bottom, and clorox outlet is arranged on electrolytic reaction groove side.
Described integrated hydrogen sulfide stripping device is identical with the structure of the stripping tank of ammonia nitrogen blowing-off device, it comprises stripping tank, stripping tank is provided with inlet pipe, water inlet pipe, evacuated tube and rising pipe, described inlet pipe is between water inlet pipe and rising pipe, water inlet pipe is positioned at below rising pipe, aeration head is provided with in described stripping tank, aeration head is connected with inlet pipe, described stripping pot bottom is provided with well heater, described stripping tank top is provided with effuser, and the other end of effuser is connected on air sweetening tower.
Sulfur Gas Fields recovered water passes in Sweet natural gas stripping tower, then in Sweet natural gas stripping tower, Sweet natural gas is passed into, the intake of Sweet natural gas is 60 ~ 100 times of the sulfur Gas Fields extraction water yield, gas after stripping imports to Gas Purification Factory pressure feed gas pipeline and carries out desulfurization process, generate the sulfur product of high added value, liquid after stripping imports in integrated hydrogen sulfide stripping device and carries out the process of hydrogen sulfide stripping, the gas produced adds sweetening agent and can obtain elemental sulfur through the effect of air sweetening tower again, and hydrogen sulfide is transformed into elemental sulfur or sulfide precipitation in remaining liquid, the regenerant of elemental sulfur and sulfide can be obtained after filtration, the air capacity passing into integrated hydrogen sulfide stripping device is 600 ~ 1000 times of the amount of liquid passed into, remaining liquid is passed in preevaporator and carries out prevapourising, the temperature of prevapourising is 110 ~ 115 DEG C, when remaining liquid prevapourising amount to 20% ~ 300% time, be transferred in multiple-effect evaporator and carry out multiple-effect evaporation, the temperature of multiple-effect evaporation is 90 DEG C ~ 110 DEG C, be passed in ammonia nitrogen blowing-off device in the distilled water that prevapourising produces and carry out ammonia-nitrogen desorption, stripping ammonia nitrogen dilute sulphuric acid out absorbs, generate ammonium sulfate, and the distilled water after stripping and the distilled water after multiple-effect evaporation can reuses, the mother liquor that multiple-effect evaporation produces imports to and is back to integrated hydrogen sulfide stripping device after electrolysis-catalytic oxidation device carries out catalytic and oxidative electrolysis technology process and carries out the process of hydrogen sulfide stripping, so just can reduce the usage quantity of air and reduce the quantity discharged of these oxygenants, the salt slurry that multiple-effect evaporation obtains goes out Industrial Salt through drying crystalline crystallization, remaining liquid is mother liquor, import to electrolysis-catalytic oxidation device and carry out catalytic and oxidative electrolysis technology.The real object reaching pollution-free zero release, and omnibearing recycling has been carried out to the material in recovered water.
Principle of the present invention is: sulfur Gas Fields waste water, through stripping process, obtains sulfur product after gas processing, and liquid obtains elemental sulfur through air stripping process, after these two step process, in waste water sulphur be removed, and change into Industrial products; Again through prevapourising after sulphur removal, the distilled water of generation, through ammonia-nitrogen desorption process, just can remove the ammonia nitrogen in waste water, obtains ammonium sulfate, not only do not pollute the environment, can also obtain Industrial products with dilute sulphuric acid after absorbing; The mother liquor that multiple-effect evaporation produces refluxes in second step after catalytic and oxidative electrolysis technology process, the intake of air can be reduced, help hydrogen sulfide stripping, Appropriate application mother liquor, mother liquor after hydrogen persulfide stripping carries out prevapourising, multiple-effect evaporation and catalytic and oxidative electrolysis technology again, circulation like this is gone down, and has carried out effective process to mother liquor, does not need to discharge mother liquor contaminate environment; And the distilled water after ammonia-nitrogen desorption process and the distilled water after multiple-effect evaporation are as the reuse of recirculated cooling water make up water, this just reaches the object of recycle, and the waste water of generation is few, and the water of consumption is few, reaches the object of energy-saving and emission-reduction.
Compared with prior art, the present invention has following beneficial effect:
Non-wastewater discharge of the present invention, decreases the harm to environment; Hydrogen sulfide in water is become sulfur product by present method compared with existing produced-water reinjection technology, and ammonia nitrogen becomes ammonium sulfate fertilizer, inorganic salt become Industrial Salt, water becomes cyclically utilizing water, realizes waste water reclamation and utilizes resource utilization; Present method does not add a large amount of chemical oxidizing agent, reduces the harm to environment, avoids the introducing that some contain heavy metal sweetening agent.
The present invention is by the partial vulcanization hydrogen in removing sulfur Gas Fields recovered water, then by the hydrogen sulfide in air stripping sulphur removal method removing liquid, by this effect of two, the hydrogen sulfide in recovered water is all processed, then in the effect by prevapourising and multiple-effect evaporation, the inorganic salt in liquid are reclaimed, ammonia-nitrogen desorption process is carried out to distilled water simultaneously, removing ammonia nitrogen, and be recovered as ammonium sulfate, and the such as chlorine that mother liquor is produced after oxide treatment, the oxygenant such as dioxide peroxide and clorox is introduced in the oxide treatment realizing hydrogen sulfide in integrated hydrogen sulfide stripping device, decrease stripping air consumption, achieve " treatment of wastes with processes of wastes against one another ".It also avoid the discharge of chlorine, dioxide peroxide and clorox simultaneously, be back to again in multiple-effect evaporator through the mother liquor of oxide treatment and carry out multiple-effect evaporation, crystallization goes out inorganic salt, by these process, distilled water can be recycled, substantially reach comprehensively recyling of the material in recovered water, reach the object of zero release, can not produce surrounding environment and pollute.
In the liquid after second step, add sodium hydroxide and sodium carbonate, after the calcium magnesium in removing liquid and suspended substance, carry out the 3rd step again.Its objective is that calcium magnesium in removing liquid and suspended substance prevent from producing scaling fouling preevaporator and multiple-effect evaporator when prevapourising and multiple-effect evaporation.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic 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.
Mark in figure: 1, direct supply, 2, electrode, 3, electrolytic reaction groove, 4, air outlet, 5, fluid inlet, 6, clorox exports, 7, liquid outlet, 8, stripping tank, 9, off gas treatment tank, 10, pump, 11, inlet pipe, 12, water inlet pipe, 13, evacuated tube, 14, rising pipe, 15, aeration head, 16, effuser, 17, well heater, 18, water pipe, 19, water distributor, 20, sight glass, 21, glass-tube liquid level, 22, thermal insulation layer, 23, porous plate, 24, filler, 25, Sweet natural gas stripping tower, 26, integration hydrogen sulfide stripping device, 27, air sweetening tower, 28, preevaporator, 29, ammonia nitrogen blowing-off device, 30, multiple-effect evaporator, 31, electrolysis-catalytic oxidation device, 32, crystallizer, 33, integration coagulation and filtration device.
Embodiment
Below in conjunction with embodiment, the invention will be further described, and described embodiment is only the present invention's part embodiment, is not whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments used obtained under creative work prerequisite, belongs to protection scope of the present invention.
Embodiment 1
A kind of sulfur Gas Fields produced water disposal system, it is characterized in that: comprise Sweet natural gas stripping tower 25, integration hydrogen sulfide stripping device 26, air sweetening tower 27, preevaporator 28, ammonia nitrogen blowing-off device 29, multiple-effect evaporator 30, electrolysis-catalytic oxidation device 31 and crystallizer 32, described Sweet natural gas stripping tower 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, described integrated hydrogen sulfide stripping device 26 is connected with preevaporator 28 by pipeline, described preevaporator 28 is connected with multiple-effect evaporator 30 by pipeline, described preevaporator 28 is connected with ammonia nitrogen blowing-off device 29 by pipeline, described multiple-effect evaporator 30 is connected with electrolysis-catalytic oxidation device 31 by pipeline, described multiple-effect evaporator 30 is connected with crystallizer 32 by pipeline, described crystallizer 32 is connected with electrolysis-catalytic oxidation device 31 by pipeline, described electrolysis-catalytic oxidation device 31 is connected with integrated hydrogen sulfide stripping device 26 by pipeline.
Sulfur Gas Fields recovered water passes in Sweet natural gas stripping tower, then in Sweet natural gas stripping tower, Sweet natural gas is passed into, the intake of Sweet natural gas is 60 times of sulfur Gas Fields recovered water, gas after stripping imports to Gas Purification Factory pressure feed gas pipeline and carries out desulfurization process, generate the sulfur product of high added value, liquid after stripping imports in integrated hydrogen sulfide stripping device and carries out the process of hydrogen sulfide stripping, the gas produced adds sweetening agent and can obtain elemental sulfur through the effect of air sweetening tower again, and hydrogen sulfide is transformed into elemental sulfur or sulfide precipitation in remaining liquid, the regenerant of elemental sulfur and sulfide can be obtained after filtration, the air capacity passing into integrated hydrogen sulfide stripping device is 600 times of the amount of liquid passed into, remaining liquid is passed in preevaporator and carries out prevapourising, the temperature of prevapourising is 100 DEG C, when remaining liquid prevapourising amount to 30% time, be transferred in multiple-effect evaporator and carry out multiple-effect evaporation, the temperature of multiple-effect evaporation is 110 DEG C, be passed in ammonia nitrogen blowing-off device in the distilled water that prevapourising produces and carry out ammonia-nitrogen desorption, stripping ammonia nitrogen dilute sulphuric acid out absorbs, generate ammonium sulfate, and the distilled water after stripping and the distilled water after multiple-effect evaporation can reuses, and the mother liquor produced imports to and is back to integrated hydrogen sulfide stripping device after electrolysis-catalytic oxidation device carries out catalytic and oxidative electrolysis technology process and carries out the process of hydrogen sulfide stripping, so just can reduce the usage quantity of air and reduce the quantity discharged of these oxygenants, the salt slurry that multiple-effect evaporation obtains goes out Industrial Salt through drying crystalline crystallization, remaining liquid is mother liquor, import to electrolysis-catalytic oxidation device and carry out catalytic and oxidative electrolysis technology.The real object reaching pollution-free zero release, 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 comprises stripping tank 8, off gas treatment tank 9 and pump 10, described stripping tank 8 is provided with inlet pipe 11, water inlet pipe 12, evacuated tube 13 and rising pipe 14, described inlet pipe 11 is between water inlet pipe 12 and rising pipe 14, water inlet pipe 12 is positioned at below rising pipe 14, aeration head 15 is provided with in described stripping tank 8, aeration head 15 is connected with inlet pipe 11, well heater 17 is provided with bottom described stripping tank 8, described stripping tank 8 top is provided with effuser 16, the other end of effuser 16 is positioned at off gas treatment tank 9, the water-in of described pump 10 is connected to the bottom of off gas treatment tank 9, the water outlet of described pump 10 is connected with water pipe 18, the other end of water pipe 18 is connected with water distributor 19, water distributor 19 is positioned at the top of off gas treatment tank 9.
Described stripping tank 8 is also provided with sight glass 20 and glass-tube liquid level 21, sight glass 20 is arranged on the medium position of stripping tank 8, extend into the bottom position of stripping tank 8 bottom glass-tube liquid level 21, and glass-tube liquid level 21 top extend into the tip position of stripping tank 8.
Described stripping tank 8 is provided with thermal insulation layer 22.
Be provided with two porous plates 23 in described off gas treatment tank 9, between two porous plates 23, be filled with filler 24.
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, it comprises stripping tank, stripping tank is provided with inlet pipe, water inlet pipe, evacuated tube and rising pipe, described inlet pipe is between water inlet pipe and rising pipe, water inlet pipe is positioned at below rising pipe, aeration head is provided with in described stripping tank, aeration head is connected with inlet pipe, described stripping pot bottom is provided with well heater, described stripping tank top is provided with effuser, and the other end of effuser is connected on air sweetening tower.
The electrolysis-catalytic oxidation device mentioned in the present embodiment comprises direct supply 1, electrode 2 and electrolytic reaction groove 3, electrode 2 is inserted in electrolytic reaction groove 3, direct supply 1 is connected with electrode 2, electrolytic reaction groove 3 is for loading mother liquor, electrolytic reaction groove 3 is provided with air outlet 4, fluid inlet 5, clorox outlet 6 and liquid outlet 7, air outlet 4 is arranged on electrolytic reaction groove 3 top, and liquid outlet 7 is arranged on bottom electrolytic reaction groove 3, and clorox outlet 6 is arranged on electrolytic reaction groove 3 side.
Embodiment 2
A kind of sulfur Gas Fields produced water disposal system, it is characterized in that: comprise Sweet natural gas stripping tower 25, integration hydrogen sulfide stripping device 26, air sweetening tower 27, preevaporator 28, ammonia nitrogen blowing-off device 29, multiple-effect evaporator 30, electrolysis-catalytic oxidation device 31 and crystallizer 32, described Sweet natural gas stripping tower 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, described integrated hydrogen sulfide stripping device 26 is connected with preevaporator 28 by pipeline, described preevaporator 28 is connected with multiple-effect evaporator 30 by pipeline, described preevaporator 28 is connected with ammonia nitrogen blowing-off device 29 by pipeline, described multiple-effect evaporator 30 is connected with electrolysis-catalytic oxidation device 31 by pipeline, described multiple-effect evaporator 30 is connected with crystallizer 32 by pipeline, described crystallizer 32 is connected with electrolysis-catalytic oxidation device 31 by pipeline, described electrolysis-catalytic oxidation device 31 is connected with integrated hydrogen sulfide stripping device 26 by pipeline.
Described a kind of sulfur Gas Fields produced water disposal system, also comprise integrated coagulation and filtration device 33, integrated coagulation and filtration device 33 is connected on the pipeline between integrated hydrogen sulfide stripping device 26 and preevaporator 28.
Sulfur Gas Fields recovered water passes in Sweet natural gas stripping tower, then in Sweet natural gas stripping tower, Sweet natural gas is passed into, the intake of Sweet natural gas is 70 times of the sulfur Gas Fields extraction water yield, gas after stripping imports to Gas Purification Factory pressure feed gas pipeline and carries out desulfurization process, generate the sulfur product of high added value, liquid after stripping imports in integrated hydrogen sulfide stripping device and carries out the process of hydrogen sulfide stripping, the gas produced adds sweetening agent and can obtain elemental sulfur through the effect of air sweetening tower again, and hydrogen sulfide is transformed into elemental sulfur or sulfide precipitation in remaining liquid, the regenerant of elemental sulfur and sulfide can be obtained after filtration, the air capacity passing into integrated hydrogen sulfide stripping device is 800 times of the amount of liquid passed into, remaining liquid is passed in preevaporator and carries out prevapourising, the temperature of prevapourising is 110 DEG C, when remaining liquid prevapourising amount to 25% time, be transferred in multiple-effect evaporator and carry out multiple-effect evaporation, the temperature of multiple-effect evaporation is 90 DEG C, be passed in ammonia nitrogen blowing-off device in the distilled water that prevapourising produces and carry out ammonia-nitrogen desorption, stripping ammonia nitrogen dilute sulphuric acid out absorbs, generate ammonium sulfate, and the distilled water after stripping and the distilled water after multiple-effect evaporation can reuses, the mother liquor that multiple-effect evaporation produces imports to and is back to integrated hydrogen sulfide stripping device after electrolysis-catalytic oxidation device carries out catalytic and oxidative electrolysis technology process and carries out the process of hydrogen sulfide stripping, so just can reduce the usage quantity of air and reduce the quantity discharged of these oxygenants, the salt slurry that multiple-effect evaporation obtains goes out Industrial Salt through drying crystalline crystallization, remaining liquid is mother liquor, import to electrolysis-catalytic oxidation device and carry out catalytic and oxidative electrolysis technology.The real object reaching pollution-free zero release, and omnibearing recycling has been carried out to the material in recovered water.
The present embodiment, when carrying out prevapourising, first adds after the alkaloids such as sodium hydroxide and sodium carbonate removes calcium magnesium in liquid and suspended substance toward the liquid after the process of integrated hydrogen sulfide stripping device stripping and carries out the 3rd step again.Its objective is that calcium magnesium in removing liquid and suspended substance prevent from producing scaling fouling preevaporator and multiple-effect evaporator when prevapourising and multiple-effect evaporation, calcium magnesium and the suspended substance of precipitation is filtered out, the calcium magnesium adopting solid waste landfill disposal to filter out and suspended substance with integrated coagulation and filtration device.
The ammonia nitrogen blowing-off device that the present embodiment is mentioned comprises stripping tank 8, off gas treatment tank 9 and pump 10, described stripping tank 8 is provided with inlet pipe 11, water inlet pipe 12, evacuated tube 13 and rising pipe 14, described inlet pipe 11 is between water inlet pipe 12 and rising pipe 14, water inlet pipe 12 is positioned at below rising pipe 14, aeration head 15 is provided with in described stripping tank 8, aeration head 15 is connected with inlet pipe 11, well heater 17 is provided with bottom described stripping tank 8, described stripping tank 8 top is provided with effuser 16, the other end of effuser 16 is positioned at off gas treatment tank 9, the water-in of described pump 10 is connected to the bottom of off gas treatment tank 9, the water outlet of described pump 10 is connected with water pipe 18, the other end of water pipe 18 is connected with water distributor 19, water distributor 19 is positioned at the top of off gas treatment tank 9.
Described stripping tank 8 is also provided with sight glass 20 and glass-tube liquid level 21, sight glass 20 is arranged on the medium position of stripping tank 8, extend into the bottom position of stripping tank 8 bottom glass-tube liquid level 21, and glass-tube liquid level 21 top extend into the tip position of stripping tank 8.
Described stripping tank 8 is provided with thermal insulation layer 22.
Be provided with two porous plates 23 in described off gas treatment tank 9, between two porous plates 23, be filled with filler 24.
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, it comprises stripping tank, stripping tank is provided with inlet pipe, water inlet pipe, evacuated tube and rising pipe, described inlet pipe is between water inlet pipe and rising pipe, water inlet pipe is positioned at below rising pipe, aeration head is provided with in described stripping tank, aeration head is connected with inlet pipe, described stripping pot bottom is provided with well heater, described stripping tank top is provided with effuser, and the other end of effuser is connected on air sweetening tower.
The electrolysis-catalytic oxidation device mentioned in the present embodiment comprises direct supply 1, electrode 2 and electrolytic reaction groove 3, electrode 2 is inserted in electrolytic reaction groove 3, direct supply 1 is connected with electrode 2, electrolytic reaction groove 3 is for loading mother liquor, electrolytic reaction groove 3 is provided with air outlet 4, fluid inlet 5, clorox outlet 6 and liquid outlet 7, air outlet 4 is arranged on electrolytic reaction groove 3 top, and liquid outlet 7 is arranged on bottom electrolytic reaction groove 3, and clorox outlet 6 is arranged on electrolytic reaction groove 3 side.
Embodiment 3
A kind of sulfur Gas Fields produced water disposal system, it is characterized in that: comprise Sweet natural gas stripping tower 25, integration hydrogen sulfide stripping device 26, air sweetening tower 27, preevaporator 28, ammonia nitrogen blowing-off device 29, multiple-effect evaporator 30, electrolysis-catalytic oxidation device 31 and crystallizer 32, described Sweet natural gas stripping tower 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, described integrated hydrogen sulfide stripping device 26 is connected with preevaporator 28 by pipeline, described preevaporator 28 is connected with multiple-effect evaporator 30 by pipeline, described preevaporator 28 is connected with ammonia nitrogen blowing-off device 29 by pipeline, described multiple-effect evaporator 30 is connected with electrolysis-catalytic oxidation device 31 by pipeline, described multiple-effect evaporator 30 is connected with crystallizer 32 by pipeline, described crystallizer 32 is connected with electrolysis-catalytic oxidation device 31 by pipeline, described electrolysis-catalytic oxidation device 31 is connected with integrated hydrogen sulfide stripping device 26 by pipeline.
Described a kind of sulfur Gas Fields produced water disposal system, also comprise integrated coagulation and filtration device 33, integrated coagulation and filtration device 33 is connected on the pipeline between integrated hydrogen sulfide stripping device 26 and preevaporator 28.
Sulfur Gas Fields recovered water passes in Sweet natural gas stripping tower, then in Sweet natural gas stripping tower, Sweet natural gas is passed into, the intake of Sweet natural gas is 100 times of the sulfur Gas Fields extraction water yield, gas after stripping imports to Gas Purification Factory pressure feed gas pipeline and carries out desulfurization process, generate the sulfur product of high added value, liquid after stripping imports in integrated hydrogen sulfide stripping device and carries out the process of hydrogen sulfide stripping, the gas produced adds sweetening agent and can obtain elemental sulfur through the effect of air sweetening tower again, and hydrogen sulfide is transformed into elemental sulfur or sulfide precipitation in remaining liquid, the regenerant of elemental sulfur and sulfide can be obtained after filtration, the air capacity passing into integrated hydrogen sulfide stripping device is 1000 times of the amount of liquid passed into, remaining liquid is passed in preevaporator and carries out prevapourising, the temperature of prevapourising is 110 DEG C, when remaining liquid prevapourising amount to 20% time, be transferred in multiple-effect evaporator and carry out multiple-effect evaporation, the temperature of multiple-effect evaporation is 115 DEG C, be passed in ammonia nitrogen blowing-off device in the distilled water that prevapourising produces and carry out ammonia-nitrogen desorption, stripping ammonia nitrogen dilute sulphuric acid out absorbs, generate ammonium sulfate, and the distilled water after stripping and the distilled water after multiple-effect evaporation can reuses, and the mother liquor produced imports to and is back to integrated hydrogen sulfide stripping device after electrolysis-catalytic oxidation device carries out catalytic and oxidative electrolysis technology process and carries out the process of hydrogen sulfide stripping, so just can reduce the usage quantity of air and reduce the quantity discharged of these oxygenants, the salt slurry that multiple-effect evaporation obtains goes out Industrial Salt through drying crystalline crystallization, remaining liquid is mother liquor, import to electrolysis-catalytic oxidation device and carry out catalytic and oxidative electrolysis technology.The real object reaching pollution-free zero release, and omnibearing recycling has been carried out to the material in recovered water.The present embodiment, when carrying out prevapourising, first adds after the alkaloids such as sodium hydroxide and sodium carbonate removes calcium magnesium in liquid and suspended substance toward the liquid after the process of integrated hydrogen sulfide stripping device stripping and carries out the 3rd step again.Its objective is that calcium magnesium in removing liquid and suspended substance prevent from producing scaling fouling preevaporator and multiple-effect evaporator when prevapourising and multiple-effect evaporation, calcium magnesium and the suspended substance of precipitation is filtered out, the calcium magnesium adopting solid waste landfill disposal to filter out and suspended substance with integrated coagulation and filtration device.
The ammonia nitrogen blowing-off device that the present embodiment is mentioned comprises stripping tank 8, off gas treatment tank 9 and pump 10, described stripping tank 8 is provided with inlet pipe 11, water inlet pipe 12, evacuated tube 13 and rising pipe 14, described inlet pipe 11 is between water inlet pipe 12 and rising pipe 14, water inlet pipe 12 is positioned at below rising pipe 14, aeration head 15 is provided with in described stripping tank 8, aeration head 15 is connected with inlet pipe 11, well heater 17 is provided with bottom described stripping tank 8, described stripping tank 8 top is provided with effuser 16, the other end of effuser 16 is positioned at off gas treatment tank 9, the water-in of described pump 10 is connected to the bottom of off gas treatment tank 9, the water outlet of described pump 10 is connected with water pipe 18, the other end of water pipe 18 is connected with water distributor 19, water distributor 19 is positioned at the top of off gas treatment tank 9.
Described stripping tank 8 is also provided with sight glass 20 and glass-tube liquid level 21, sight glass 20 is arranged on the medium position of stripping tank 8, extend into the bottom position of stripping tank 8 bottom glass-tube liquid level 21, and glass-tube liquid level 21 top extend into the tip position of stripping tank 8.
Described stripping tank 8 is provided with thermal insulation layer 22.
Be provided with two porous plates 23 in described off gas treatment tank 9, between two porous plates 23, be filled with filler 24.
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, it comprises stripping tank, stripping tank is provided with inlet pipe, water inlet pipe, evacuated tube and rising pipe, described inlet pipe is between water inlet pipe and rising pipe, water inlet pipe is positioned at below rising pipe, aeration head is provided with in described stripping tank, aeration head is connected with inlet pipe, described stripping pot bottom is provided with well heater, described stripping tank top is provided with effuser, and the other end of effuser is connected on air sweetening tower.
The electrolysis-catalytic oxidation device mentioned in the present embodiment comprises direct supply 1, electrode 2 and electrolytic reaction groove 3, electrode 2 is inserted in electrolytic reaction groove 3, direct supply 1 is connected with electrode 2, electrolytic reaction groove 3 is for loading mother liquor, electrolytic reaction groove 3 is provided with air outlet 4, fluid inlet 5, clorox outlet 6 and liquid outlet 7, air outlet 4 is arranged on electrolytic reaction groove 3 top, and liquid outlet 7 is arranged on bottom electrolytic reaction groove 3, and clorox outlet 6 is arranged on electrolytic reaction groove 3 side.
The preevaporator that the present invention mentions, multiple-effect evaporator, Sweet natural gas stripping tower, air sweetening tower and integrated coagulation and filtration device adopt preevaporator, multiple-effect evaporator, Sweet natural gas stripping tower, air sweetening tower and integrated coagulation and filtration device on the market.
Claims (7)
1. a sulfur Gas Fields produced water disposal system, it is characterized in that: comprise Sweet natural gas stripping tower, integration hydrogen sulfide stripping device, air sweetening tower, preevaporator, ammonia nitrogen blowing-off device, multiple-effect evaporator, electrolysis-catalytic oxidation device and crystallizer, described Sweet natural gas stripping tower is connected on hydrogen sulfide stripping device by pipeline, described integrated hydrogen sulfide stripping device is connected with air sweetening tower by pipeline, described integrated hydrogen sulfide stripping device is connected with preevaporator by pipeline, described preevaporator is connected with multiple-effect evaporator by pipeline, described preevaporator is connected with ammonia nitrogen blowing-off device by pipeline, described multiple-effect evaporator is connected with electrolysis-catalytic oxidation device by pipeline, described multiple-effect evaporator is connected with crystallizer by pipeline, described crystallizer is connected with electrolysis-catalytic oxidation device by pipeline, described electrolysis-catalytic oxidation device is connected with integrated hydrogen sulfide stripping device by pipeline.
2. a kind of sulfur Gas Fields produced water disposal system according to claim 1, it is characterized in that: also comprise integrated coagulation and filtration device, integrated coagulation and filtration device is connected on the pipeline between integrated hydrogen sulfide stripping device and preevaporator.
3. a kind of sulfur Gas Fields produced water disposal system according to claim 1 and 2, it is characterized in that: described ammonia nitrogen blowing-off device comprises stripping tank, off gas treatment tank and pump, described stripping tank is provided with inlet pipe, water inlet pipe, evacuated tube and rising pipe, described inlet pipe is between water inlet pipe and rising pipe, water inlet pipe is positioned at below rising pipe, aeration head is provided with in described stripping tank, aeration head is connected with inlet pipe, described stripping pot bottom is provided with well heater, described stripping tank top is provided with effuser, the other end of effuser is positioned at off gas treatment tank, the water-in of described pump is connected to the bottom of off gas treatment tank, the water outlet of described pump is connected with water pipe, the other end of water pipe is connected with water distributor, water distributor is positioned at the top of off gas treatment tank.
4. a kind of sulfur Gas Fields produced water disposal system according to claim 3, it is characterized in that: described stripping tank is also provided with sight glass and glass-tube liquid level, sight glass is arranged on the medium position of stripping tank, extend into the bottom position of stripping tank bottom glass-tube liquid level, glass-tube liquid level top extend into the tip position of stripping tank.
5. a kind of sulfur Gas Fields produced water disposal system according to claim 3, is characterized in that: described stripping tank is provided with thermal insulation layer, is provided with two porous plates, is filled with filler between two porous plates in described off gas treatment tank.
6. a kind of sulfur Gas Fields produced water disposal system according to claim 1, it is characterized in that: described electrolysis-catalytic oxidation device comprises direct supply, electrode and electrolytic reaction groove, electrode is inserted in electrolytic reaction groove, direct supply is connected with electrode, electrolytic reaction groove is for loading mother liquor, electrolytic reaction groove is provided with air outlet, fluid inlet, clorox outlet and liquid outlet, air outlet is arranged on electrolytic reaction groove top, liquid outlet is arranged on electrolytic reaction trench bottom, and clorox outlet is arranged on electrolytic reaction groove side.
7. a kind of sulfur Gas Fields produced water disposal system according to claim 1, it is characterized in that: sulfur Gas Fields recovered water passes in Sweet natural gas stripping tower, then in Sweet natural gas stripping tower, Sweet natural gas is passed into, the intake of Sweet natural gas is 60 ~ 100 times of the sulfur Gas Fields extraction water yield, gas after stripping imports to Gas Purification Factory pressure feed gas pipeline and carries out desulfurization process, generate the sulfur product of high added value, liquid after stripping imports in integrated hydrogen sulfide stripping device and carries out the process of hydrogen sulfide stripping, the gas produced adds sweetening agent and can obtain elemental sulfur through the effect of air sweetening tower again, and hydrogen sulfide is transformed into elemental sulfur or sulfide precipitation in remaining liquid, the regenerant of elemental sulfur and sulfide can be obtained after filtration, the air capacity passing into integrated hydrogen sulfide stripping device is 600 ~ 1000 times of the amount of liquid passed into, remaining liquid is passed in preevaporator and carries out prevapourising, the temperature of prevapourising is 110 ~ 115 DEG C, when remaining liquid prevapourising amount to 20% ~ 300% time, be transferred in multiple-effect evaporator and carry out multiple-effect evaporation, the temperature of multiple-effect evaporation is 90 DEG C ~ 110 DEG C, be passed in ammonia nitrogen blowing-off device in the distilled water that prevapourising produces and carry out ammonia-nitrogen desorption, stripping ammonia nitrogen dilute sulphuric acid out absorbs, generate ammonium sulfate, and the distilled water after stripping and the distilled water reuse after multiple-effect evaporation, the mother liquor that multiple-effect evaporation produces imports to and is back to integrated hydrogen sulfide stripping device after electrolysis-catalytic oxidation device carries out catalytic and oxidative electrolysis technology process and carries out the process of hydrogen sulfide stripping, the salt slurry that multiple-effect evaporation obtains goes out Industrial Salt through drying crystalline crystallization, remaining liquid is mother liquor, import to electrolysis-catalytic oxidation device and carry out catalytic and oxidative electrolysis technology.
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