CN105460993A - Dry environment-friendly treating and solid salt recycling system for high-concentration salt-containing waste water - Google Patents
Dry environment-friendly treating and solid salt recycling system for high-concentration salt-containing waste water Download PDFInfo
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- CN105460993A CN105460993A CN201610019953.1A CN201610019953A CN105460993A CN 105460993 A CN105460993 A CN 105460993A CN 201610019953 A CN201610019953 A CN 201610019953A CN 105460993 A CN105460993 A CN 105460993A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
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Abstract
The invention discloses a dry environment-friendly treating and solid salt recycling system for high-concentration salt-containing waste water. The system mainly comprises a waste liquid pretreatment system, an air preheating system, a drying system and a tail gas purifying system. An evaporator of an outer heating natural circulating and vacuum negative pressure mode is adopted in the pretreatment system, and the pretreatment system mainly comprises a preheater, the evaporator and a condenser. The air preheating system comprises an air filter, an air blower and an electric heater. The drying system comprises a waste liquid pump, an automation spray gun, a hot air distributor and a drying tower body. The tail gas purifying system comprises a cyclone separator, an activated carbon adsorption tower, a bag-type dust collector, an induced draft fan and an air exhaust opening. Quantity reducing treatment and harmless treatment of acrylic fiber waste water and other high-concentration salt-containing waste water are achieved, and meanwhile chemical raw materials generated in the drying process are recycled.
Description
Technical field
The present invention relates to a kind of high-concentration salt-containing wastewater dry method environmental protection treatment and reclaim solid salt technology, especially carry out minimizing, resource utilization, innoxious process for treating for chemical industry Nitrilon waste water.
Background technology
In current resource, energy-intensive situation, the energy-saving and cost-reducing major issue having become each enterprise, saves energy and reduce the cost and is not only related to environmental problem, be also related to the market competitiveness and the viability of enterprise.Meanwhile, along with the development of society, the requirement of the mankind to environmental protection is more and more higher, and this just requires enterprise's stringent environmental regulation, wants benefit to environmental protection.At present, the process of high density organic nitrile waste water is one of difficult problem of generally acknowledging both at home and abroad, and compared with abroad, the high density organic nitrile wastewater processing technology of China also has larger gap, and Nitrilon waste water treatment technology has much room for improvement.
Current China Acrylic Fibers Plant mainly contains 4 kinds of production technique circuits: sodium rhodanate one-step method, Sodium Thiocyanate 99 two step method, with dimethyl formamide (DMF) organic dry process route that is volume, organic wet process route that is solvent with N,N-DIMETHYLACETAMIDE (DMAC).
What adopt dry process has Fushun petrochemical industry Acrylic Fibers Plant, Zhenghai petrochemical industry Acrylic Fibers Plant etc.; What adopt Wet One-step technique has Lanzhou chemical fibre factory, Gaoqiao Petrochemical Company two factory, oil of SPC Acrylic Fibers Plant etc.; What adopt wet method two-step process has oil of SPC Jinyang Acrylic Fibers Plant, Daqing petrochemical Acrylic Fibers Plant, Anqing Petrochemical Company Acrylic Fibers Plant etc.New project adopts production domesticization two-step process mostly, and this technique has good product quality, raw material consumption low and discharge pollutants few obviously a little.
The process of two-step process factory effluent is comparatively complicated, and the biodegradability that there is waste water is very poor, containing more organic pollution materials, and the problems such as nitrogen content is higher.In order to effectively propose wastewater treatment scheme, just must analyze the composite water quality characteristic of Acrylic Fiber Wastewater of Two-processes Technology and component thereof, on this basis, select reliable and effective waste water treatment process targetedly, while reduction COD, BOD, remove in waste water and be difficult to biodegradable organic substance, and removal of ammonia and nitrogen; In addition further investigation is carried out to salt removal pathway contained in waste water, long-term to instruct Nitrilon waste water process to put into practice, the construction of the waste water treatment engineering of and transformation project newly-built for acrylic fibers provides design variable, the process that simultaneously can be similar industrial waste water provides theoretical foundation and tupe, to alleviate the environmental problem similar Recalcitrant chemicals and cause.
From nationwide, the treatment effect of Nitrilon waste water is generally undesirable, existing treatment process comprises the two stage biological treatment processs such as tower biological filter technique, pure oxygen aeration technique, Biological Contact Oxidation Process, the devitalized sludge processes of plug-flow all can not reach the target that Nitrilon waste water stably reaching standard is discharged, the material existing and be difficult in a large number degrade is described in Nitrilon waste water, adopts common biological inoculum can not make it degraded.If improve biodegradable effect, existing treatment process must be reformed.The process of Ge great petro-chemical corporation to Nitrilon waste water is generally comparatively paid attention to, and all at the treatment unit actively improving Nitrilon waste water, improves treatment effect.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of high-concentration salt-containing wastewater dry method environmental protection treatment and reclaiming solid salt system.Realize high-concentration salt-containing wastewater minimizing, the harmless treatments such as Nitrilon waste water, reclaim the industrial chemicals produced in drying process simultaneously.
For realizing above object, by the following technical solutions: a kind of high-concentration salt-containing wastewater dry method environmental protection treatment reclaims solid salt system, it is characterized in that, mainly comprises waste liquid pretreatment system, dehumidification system, air preheating system and exhaust gas purification system;
Described waste liquid pretreatment system comprises preheater, vaporizer, condenser and concentrated solution storage tank;
Described dehumidification system comprises waste drains pump, atomizing lance, warm air sparger, drying tower body and trace pipe;
Described air preheating system comprises air filter, gas blower, well heater;
Described exhaust gas purification system comprises cyclonic separator, activated carbon adsorber, sack cleaner, induced draft fan and venting port;
The concentrated solution container for storing liquid of described waste liquid pretreatment system is connected with the waste drains pump of dehumidification system, the entrance of drying tower body of dehumidification system is connected with the well heater of air preheating system, and the outlet of drying tower body of dehumidification system is connected with the cyclonic separator of exhaust gas purification system.
Described waste liquid pretreatment system adopts external heat natural circulation and negative pressure of vacuum mode double-effect evaporator, and adopt the hot principle of work of shell and tube circulation, external, preheater, vaporizer and condenser connect between two, and vaporizer is connected with concentrated solution storage tank.Concentrating spent liquor sends into concentrated solution storage tank, sends into unit for treating water after waste liquid evaporation through the cooled phlegma of recirculated cooling water, and the condensed water of condensation of low-pressure steam sends into water of condensation storage tank.
The drying tower body ingress of described dehumidification system is provided with atomizing lance and warm air sparger, this external layout trace pipe of drying tower, ensure that drying tower inside keeps higher temperature, atomizing lance exports with waste drains pump and is connected, and drying tower body is connected with dryed product storage tank I by discharge valve I.The tail gas of dryed product and discharge is discharged by drying tower body bottom portion.
The air filter of described air preheating system, gas blower, well heater connect successively.
The Cyclone outlet of described gas purification system is connected with activated carbon adsorber entrance, the bottom of cyclonic separator is by discharge valve II and dryed product storage tank II, dryed product is discharged by discharge valve, activated carbon adsorber outlet is connected with sack cleaner entrance, sack cleaner outlet is connected with induced draft fan entrance, sack cleaner bottom is connected with dryed product storage tank III by discharge valve III, dryed product is discharged by discharge valve, induced draft fan outlet is connected with chimney, venting port Lower Half arranges mist eliminator, and the water smoke reduced in emission is carried secretly.
The vaporizer of described waste liquid pretreatment system and the trace pipe of dehumidification system, atomizing lance all connect 1.0MPa saturation steam, and vaporizer and trace pipe outlet are connected to water of condensation storage tank.
The well heater of described air preheating system can adopt the form of steam heater and electric heater mixing, reduces running cost.
beneficial effect of the present invention: adopt physical method to process high density salt bearing liquid wastes, utilize external heat natural circulation and negative pressure of vacuum mode double-effect evaporator, material heated time is short, velocity of evaporation is fast, concentration ratio is great, the former effect of effective maintenance material, low-temperature evaporation can not produce noncondensable gas, and energy-saving effect is remarkable.Compare the technology such as biological degradation and chemical oxidation, technical process is simple, and running cost is low.Special in realizing Nitrilon waste water minimizing, harmless treatment, reclaim the industrial chemicals produced in drying process simultaneously.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
As shown in the figure: 1, waste liquid pretreatment system, 2, dehumidification system, 3, air preheating system, 4, exhaust gas purification system, 5, preheater, 6, vaporizer, 7, condenser, 8, concentrated solution storage tank, 9, waste drains pump, 10, air filter, 11, gas blower, 12, well heater, 13, atomizing lance, 14, warm air sparger, 15, drying tower body, 16, trace pipe, 17, discharge valve I, 18, dryed product storage tank I, 19, water of condensation storage tank, 20, cyclonic separator, 21, discharge valve II, 22, dryed product storage tank II, 23, activated carbon adsorber, 24, sack cleaner, 25, discharge valve III, 26, dryed product storage tank III, 27, induced draft fan, 28, venting port, 29, mist eliminator.
Embodiment
Embodiment
Below in conjunction with accompanying drawing to the present invention to further illustrating;
Waste liquid pretreatment system (1) comprises preheater (5), vaporizer (6), condenser (7) and concentrated solution storage tank (8); Preheater (5), vaporizer (6) and condenser (7) connect between two, and vaporizer (6) is connected with waste tank (8) and water of condensation storage tank (19), and vaporizer (6) connects 1.0MPa saturation steam, as heating medium.
Dehumidification system (2) comprises waste drains pump (9), atomizing lance (13), warm air sparger (14), drying tower body (15) and trace pipe (16); Drying tower body (15) ingress is provided with atomizing lance (13) and warm air sparger (14), drying tower body (15) arranges trace pipe (16) outward, atomizing lance (13), trace pipe (16) connect 1.0MPa saturation steam, trace pipe (16) outlet is connected to water of condensation storage tank (19), atomizing lance (13) exports with waste drains pump (9) and is connected, atomizing lance (13) adopts air flow type jet nozzle, and drying tower body (15) is connected with dryed product storage tank I (18) by discharge valve I (17).The structure formation of drying tower body (15) is concurrent flow; The form of warm air sparger (14) is a lot, and this programme adopts Vertical dimension mo(u)ld bottom half, porous template, is made up of four blocks of porous plates, keeps airflow absolute upright to flow downward; Drying tower body (15) bottom ash dropping hopper is designed to a cone bostle pipe section expanded, and drying tower body (15) is connected with dryed product storage tank I (18) by discharge valve I (17).Dryed product is discharged by discharge valve I (17), leaves the tail gas of bostle pipe discharge, reduces carrying secretly of fine powder, and drying tower body (15) outside is provided with trace pipe (16) for steam coils companion heat, ensures that tower inside keeps higher temperature; Drying tower is provided with door, viewing window and pressure relief opening etc., facilitates rolling inspection and maintenance.
Air preheating system (3) comprises air filter (10), gas blower (11), well heater (12), and air filter (10), gas blower (11), well heater (12) connect successively.
Exhaust gas purification system (4) comprises cyclonic separator (20), activated carbon adsorber (23), sack cleaner (24), induced draft fan (27) and venting port (28); Cyclonic separator (20) is the centrifugal force utilizing the dusty gas rotated in device to produce, a kind of dry type gas-solid separating device that dust is separated from air-flow, activated carbon adsorber (23) plays organic effect in absorption tail gas, and the effect of sack cleaner (24) is separated by dryed product thinner in tail gas further.Cyclonic separator (20) outlet is connected with activated carbon adsorber (23) entrance, the bottom of cyclonic separator (20) is by discharge valve II (21) and dryed product storage tank II (22), activated carbon adsorber (23) outlet is connected with sack cleaner (24) entrance, sack cleaner (24) outlet is connected with induced draft fan (27) entrance, sack cleaner (24) bottom is connected with dryed product storage tank III (26) by discharge valve III (25), induced draft fan (27) outlet is connected with venting port (28), venting port (28) Lower Half arranges mist eliminator (29), the water smoke reduced in emission is carried secretly.
The concentrated solution container for storing liquid (8) of waste liquid pretreatment system is connected with the waste drains pump (9) of dehumidification system, the entrance of the drying tower body (15) of dehumidification system (2) is connected with the well heater (12) of air preheating system (3), and the outlet of the drying tower body (15) of dehumidification system (2) is connected with the cyclonic separator (20) of exhaust gas purification system (4).
Claims (7)
1. high-concentration salt-containing wastewater dry method environmental protection treatment reclaims a solid salt system, it is characterized in that, mainly comprises waste liquid pretreatment system (1), dehumidification system (2), air preheating system (3) and exhaust gas purification system (4);
Described waste liquid pretreatment system (1) comprises preheater (5), vaporizer (6), condenser (7) and concentrated solution storage tank (8);
Described dehumidification system (2) comprises waste drains pump (9), atomizing lance (13), warm air sparger (14), drying tower body (15) and trace pipe (16);
Described air preheating system (3) comprises air filter (10), gas blower (11), well heater (12);
Described exhaust gas purification system (4) comprises cyclonic separator (20), activated carbon adsorber (23), sack cleaner (24), induced draft fan (27) and venting port (28);
The concentrated solution container for storing liquid (8) of described waste liquid pretreatment system is connected with the waste drains pump (9) of dehumidification system, the entrance of the drying tower body (15) of dehumidification system (2) is connected with the well heater (12) of air preheating system (3), and the outlet of the drying tower body (15) of dehumidification system (2) is connected with the cyclonic separator (20) of exhaust gas purification system (4).
2. a kind of high-concentration salt-containing wastewater dry method environmental protection treatment according to claim 1 reclaims solid salt system, it is characterized in that, the preheater (5) of described waste liquid pretreatment system, vaporizer (6) and condenser (7) connect between two, and vaporizer (6) is connected with concentrated solution storage tank (8).
3. a kind of high-concentration salt-containing wastewater dry method environmental protection treatment according to claim 1 reclaims solid salt system, it is characterized in that, drying tower body (15) ingress of described dehumidification system (2) is provided with atomizing lance (13) and warm air sparger (14), drying tower body (15) arranges trace pipe (16) outward, atomizing lance (13) exports with waste drains pump (9) and is connected, and drying tower body (15) is connected with dryed product storage tank I (18) by discharge valve I (17).
4. a kind of high-concentration salt-containing wastewater dry method environmental protection treatment according to claim 1 reclaims solid salt system, and it is characterized in that, the air filter (10) of described air preheating system (3), gas blower (11), well heater (12) connect successively.
5. a kind of high-concentration salt-containing wastewater dry method environmental protection treatment according to claim 1 reclaims solid salt system, it is characterized in that, cyclonic separator (20) outlet of described gas purification system (4) is connected with activated carbon adsorber (23) entrance, the bottom of cyclonic separator (20) is by discharge valve II (21) and dryed product storage tank II (22), activated carbon adsorber (23) outlet is connected with sack cleaner (24) entrance, sack cleaner (24) outlet is connected with induced draft fan (27) entrance, sack cleaner (24) bottom is connected with dryed product storage tank III (26) by discharge valve III (25), induced draft fan (27) outlet is connected with chimney (28), venting port (28) Lower Half arranges mist eliminator (29).
6. a kind of high-concentration salt-containing wastewater dry method environmental protection treatment according to claim 1 reclaims solid salt system, it is characterized in that, the vaporizer (6) of described waste liquid pretreatment system (1) and the trace pipe (16) of dehumidification system (2), atomizing lance (13) all connect 1.0MPa saturation steam, and vaporizer (6) and trace pipe (16) outlet are connected to water of condensation storage tank (19).
7. a kind of high-concentration salt-containing wastewater dry method environmental protection treatment according to claim 1 reclaims solid salt system, it is characterized in that, the well heater (12) of described air preheating system (3) can adopt the form of steam heater and electric heater mixing.
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| CN201610019953.1A CN105460993A (en) | 2016-01-13 | 2016-01-13 | Dry environment-friendly treating and solid salt recycling system for high-concentration salt-containing waste water |
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| CN201610019953.1A CN105460993A (en) | 2016-01-13 | 2016-01-13 | Dry environment-friendly treating and solid salt recycling system for high-concentration salt-containing waste water |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106077050A (en) * | 2016-08-16 | 2016-11-09 | 南京格洛特环境工程股份有限公司 | A kind of microwave cracking method of side-product salt |
| CN106673101A (en) * | 2016-12-28 | 2017-05-17 | 常州大学 | Deep treatment method and system for high-salinity desulfurization wastewater |
| CN108408812A (en) * | 2018-04-04 | 2018-08-17 | 常熟理工学院 | A kind of desalting method and device of brine waste |
| CN109569163A (en) * | 2018-12-31 | 2019-04-05 | 阮氏化工（常熟）有限公司 | The method of high-concentration metallic ions acid-bearing wastewater recycling metal salt product |
| CN111359239A (en) * | 2020-04-14 | 2020-07-03 | 杭州蕴泽环境科技有限公司 | Spray drying tail gas energy-saving dehumidification system and method |
| CN111437618A (en) * | 2020-04-14 | 2020-07-24 | 新疆天富环保科技有限公司 | Spray drying tail gas energy-saving anti-freezing dehumidification system and method |
| CN112851007A (en) * | 2021-01-18 | 2021-05-28 | 清控环境(北京)有限公司 | Processing system of high concentrated organic waste water zero release of industry high salt |
| CN114007714A (en) * | 2019-04-26 | 2022-02-01 | Ews有限责任公司 | Compact containerization system and method for jet evaporation of water |
| US11998860B2 (en) | 2015-06-10 | 2024-06-04 | Energy Water Solutions, LLC | Geothermal heat retainment system and method for direct use in spray evaporation of water |
| US11998859B2 (en) | 2015-06-10 | 2024-06-04 | Energy Water Solutions, LLC | Compact containerized system and method for spray evaporation of water |
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| CN114007714A (en) * | 2019-04-26 | 2022-02-01 | Ews有限责任公司 | Compact containerization system and method for jet evaporation of water |
| CN114007714B (en) * | 2019-04-26 | 2023-10-27 | Ews有限责任公司 | Compact containerization system and method for spray evaporation of water |
| CN111437618A (en) * | 2020-04-14 | 2020-07-24 | 新疆天富环保科技有限公司 | Spray drying tail gas energy-saving anti-freezing dehumidification system and method |
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