CN214654326U - A system for treating tungsten smelting wastewater - Google Patents
A system for treating tungsten smelting wastewater Download PDFInfo
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- CN214654326U CN214654326U CN202120644411.XU CN202120644411U CN214654326U CN 214654326 U CN214654326 U CN 214654326U CN 202120644411 U CN202120644411 U CN 202120644411U CN 214654326 U CN214654326 U CN 214654326U
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- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
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- KTTMEOWBIWLMSE-UHFFFAOYSA-N diarsenic trioxide Chemical compound O1[As](O2)O[As]3O[As]1O[As]2O3 KTTMEOWBIWLMSE-UHFFFAOYSA-N 0.000 description 1
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Abstract
本实用新型公开了一种处理钨冶炼废水的系统，包括第一水泵、第一液体流量计、第一搅拌器、第二水泵、控制电脑、第三水泵、第二搅拌器、第四水泵、第二液体流量计、第一温度计、除砷池、第一排泥口、沉淀池、第二排泥口、气体流量计、第二温度计、电磁空气泵、膜生物反应池、曝气头、第三排泥口、膜组件及污泥池。本实用新型的处理钨冶炼废水的系统根据钨冶炼废水及其生物脱氮处理微生物各菌群的生理特性，从废水处理技术研发技巧入手，破解了钨冶炼废水实现生物全脱氮、降低基建投资、减小运行成本、节省建设用地、节约资源和能源等难题。
The utility model discloses a system for treating tungsten smelting wastewater, comprising a first water pump, a first liquid flow meter, a first agitator, a second water pump, a control computer, a third water pump, a second agitator, a fourth water pump, The second liquid flowmeter, the first thermometer, the arsenic removal tank, the first mud discharge port, the sedimentation tank, the second mud discharge port, the gas flowmeter, the second thermometer, the electromagnetic air pump, the membrane biological reaction tank, the aeration head, The third row of mud outlet, membrane module and sludge tank. The system for treating tungsten smelting wastewater according to the utility model is based on the physiological characteristics of tungsten smelting wastewater and its biological denitrification treatment microorganisms, and starts from the research and development skills of wastewater treatment technology. , reduce operating costs, save construction land, save resources and energy and other problems.
Description
Technical Field
The utility model relates to a smelt waste water treatment, concretely relates to two segmentation molysite flocculation + system that integration MBR system handled tungsten and smelt waste water.
Background
At present, in the process of producing Ammonium Paratungstate (APT) by tungsten smelting, a large amount of alkaline organic wastewater containing ammonia nitrogen and arsenic is generated through three stages of ion exchange resin adsorption, resin leaching desorption, APT crystallization preparation and the like. The main water quality indexes are as follows: NH4+ -N concentration: 258-342mg/L, COD is about 152-204mg/L, arsenic is about 10-13mg/L, and pH is about 9-10. NH4+ -N is one of the main causes of eutrophication and blackening and smelling of water body as the main nutrient substance of plants and microorganisms. The As element is one of the first harmful substances in the wastewater, and the arsenic oxide of the As element has high toxicity. Therefore, the large discharge of the tungsten smelting wastewater not only causes serious pollution to the environment, but also directly threatens the health of human beings.
Membrane Bioreactors (MBR) have two advantages over traditional activated sludge processes: the method has the advantages that the efficient interception effect of the membrane is realized, the hydraulic retention time and the sludge retention time are thoroughly separated, so that the sludge age is long, the occupied area is small, the growth and the propagation of nitrobacteria with slow proliferation are facilitated, and the nitrification capacity is improved. The sludge concentration is high, because the dissolved oxygen is limited by the diffusion speed, the dissolved oxygen gradient is generated in the micro-environment area of the microbial flocs or the biological membrane, the concentration of the dissolved oxygen on the outer surface is high, the growth and the propagation of nitrobacteria and ammonifying bacteria are facilitated, and the more deep the inside, the lower the concentration of the dissolved oxygen is, and the more the denitrifying bacteria are dominant. The advantages create good process conditions for realizing synchronous nitrification and denitrification, and simultaneously, the reactor can have a plurality of biochemical reactions such as organic matter degradation, nitrification, denitrification, anaerobic phosphorus release, aerobic phosphorus uptake and the like.
Therefore, the integrated MBR is designed based on the technology of the synchronous nitrification and denitrification process, the whole nitrification and denitrification process is carried out in one reaction container, and the integrated MBR has the advantages of small occupied area, good NH4+ -N removing effect, low energy consumption, simple operation and the like.
However, the activity of microorganisms in the sludge can be influenced and even death can be caused due to the excessively high concentration of As in the wastewater, so the method for removing As by adopting the ferric salt flocculation way is used As pretreatment, and the treatment of the tungsten smelting wastewater can be effectively realized by combining with the integrated MBR to form a two-stage sewage treatment technology.
The traditional tungsten smelting wastewater treatment method adopting the chemical precipitation method has the advantages of high treatment cost, secondary pollution and difficulty in meeting the current wastewater discharge standard, and is one of the main obstacles for restricting the sustainable development of the tungsten industry.
Typical nitrification and denitrification activated sludge processes exist: (1) higher sludge concentration is required, however, the sedimentation performance of the activated sludge with higher concentration is poorer, and meanwhile, a reactor which is large enough is required for achieving higher sludge concentration; the method [1] of the activated sludge method can simultaneously carry out the nitrification and denitrification (SNdN) processes, and other methods can not adopt SNdN, but also has the defects of large floor area, high treatment cost and the like; and the microbial growth model can verify the nitrification and denitrification processes.
The nitrification and denitrification activated sludge process is adopted to treat the wastewater containing ammonia nitrogen, and an anaerobic device and an aerobic device which are separated sufficiently are required to achieve the optimal treatment effect, so that the system occupies large area and has high treatment cost.
Disclosure of Invention
The utility model provides a to above-mentioned problem, provide a system for handle waste water is smelted to tungsten, realize the biological full denitrogenation of waste water is smelted to synchronous nitration denitrification's tungsten and handle.
The utility model adopts the technical proposal that: a system for treating tungsten smelting wastewater comprises a first water pump, a first liquid flowmeter, a first stirrer, a second water pump, a control computer, a third water pump, a second stirrer, a fourth water pump, a second liquid flowmeter, a first thermometer, an arsenic removal tank, a first sludge discharge port, a sedimentation tank, a second sludge discharge port, a gas flowmeter, a second thermometer, an electromagnetic air pump, a membrane biological reaction tank, an aeration head, a third sludge discharge port, a membrane module and a sludge tank;
the water inlet end is connected with a first water pump, the first water pump is connected with a first liquid flow meter, the first liquid flow meter is connected with an arsenic removal pool, and a first thermometer is arranged in the arsenic removal pool; the control computer is respectively connected with the first water pump, the first liquid flowmeter, the second water pump, the third water pump, the fourth water pump and the second liquid flowmeter; the arsenic removal tank is connected with the sludge tank through a first sludge discharge port; the second water pump is connected with the sedimentation tank, and the sedimentation tank is connected with the third water pump; the sedimentation tank is connected with the membrane biological reaction tank through a second sludge discharge port, an electromagnetic air pump, a gas flowmeter and a second thermometer; a second thermometer, a second stirrer and a membrane component are arranged in the membrane biological reaction tank; the membrane component is connected with a second liquid flowmeter through a fourth water pump and is connected with a water outlet end; the membrane biological reaction tank is connected with a sludge tank through a third sludge discharge port.
Further, the first stirrer and the second stirrer are used for stirring the sludge to prevent the sludge from sinking.
Further, the first thermometer and the second thermometer are used for monitoring the temperature in the system.
Furthermore, the electromagnetic air pump is used for supplying oxygen in the system.
Furthermore, the aeration head is used for supplying oxygen in the system.
The utility model has the advantages that:
according to the physiological characteristics of the tungsten smelting wastewater and the microbial communities for biological denitrification treatment, starting from the research and development skills of the wastewater treatment technology, the method solves the difficult problems of biological full denitrification, capital investment reduction, running cost reduction, construction land saving, resource and energy saving and the like of the tungsten smelting wastewater.
1) The problem of inhibiting the microorganisms by arsenic in the wastewater is solved by combining the actual water quality condition of the tungsten smelting wastewater and utilizing a front-end arsenic removal treatment method, and breakthrough and success are achieved in the application field;
2) according to the survival and life habits of microorganisms in the biological denitrification treatment of the tungsten smelting wastewater, a proper wastewater treatment facility and the internal configuration thereof are selected, which are the precondition for realizing the biological denitrification treatment of the tungsten smelting wastewater;
3) by utilizing the interception function of the membrane bioreactor, aerobic, facultative and anaerobic environments are formed in the integrated equipment, the technology of combining nitration reaction and denitrification reaction is realized, the consumption of an additional organic carbon source is reduced, and the biological full denitrification of the tungsten smelting wastewater is realized;
4) according to the characteristics of biological denitrification treatment of the tungsten smelting wastewater, an integrated MBR treatment process is selected, and the simplest process route is combined, so that the capital investment can be saved;
5) according to the natural conditions such as geography, geology, hydrology, meteorology and the like, a proper water treatment facility is selected, so that the construction land can be effectively saved, or natural resources are effectively utilized to reduce the operation cost;
6) efficient and energy-saving wastewater treatment equipment and a reasonable process route are selected, so that energy consumption can be reduced and operation cost can be reduced;
7) reasonable pretreatment and post-treatment processes of the wastewater are selected, so that the basic conditions of pre-denitrification are not damaged, the key points of reducing the quantity and the types of generated wastes are achieved, and unnecessary engineering investment waste and increase of the operation cost can be avoided.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.
FIG. 1 is a schematic view of a system for treating waste water from tungsten smelting according to an embodiment of the present invention.
Reference numerals:
the device comprises a water pump 1, a first liquid flow meter 2, a first stirrer 3, a second water pump 4, a control computer 5, a third water pump 6, a second stirrer 7, a fourth water pump 8, a second liquid flow meter 9, a first thermometer 10, an arsenic removal tank 11, a first sludge discharge port 12, a sedimentation tank 13, a second sludge discharge port 14, a gas flow meter 15, a second thermometer 16, an electromagnetic air pump 17, a membrane biological reaction tank 18, an aeration head 19, a third sludge discharge port 20, a membrane module 21 and a sludge tank 22.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, a system for treating tungsten smelting wastewater comprises a first water pump (1), a first liquid flow meter (2), a first stirrer (3), a second water pump (4), a control computer (5), a third water pump (6), a second stirrer (7), a fourth water pump (8), a second liquid flow meter (9), a first thermometer (10), an arsenic removal tank (11), a first sludge discharge port (12), a sedimentation tank (13), a second sludge discharge port (14), a gas flow meter (15), a second thermometer (16), an electromagnetic air pump (17), a membrane biological reaction tank (18), an aeration head (19), a third sludge discharge port (20), a membrane module (21) and a sludge tank (22);
the water inlet end is connected with a first water pump (1), the first water pump (1) is connected with a first liquid flow meter (2), the first liquid flow meter (2) is connected with an arsenic removal tank (11), and a first thermometer (10) is arranged in the arsenic removal tank (11); the control computer (5) is respectively connected with the first water pump (1), the first liquid flowmeter (2), the second water pump (4), the third water pump (6), the fourth water pump (8) and the second liquid flowmeter (9); the arsenic removal tank (11) is connected with a sludge tank (22) through a first sludge discharge port (12); the second water pump (4) is connected with the sedimentation tank (13), and the sedimentation tank (13) is connected with the third water pump (6); the sedimentation tank (13) is connected with the membrane biological reaction tank (18) through a second sludge discharge port (14), an electromagnetic air pump (17), a gas flowmeter (15) and a second thermometer (16); a second thermometer (16), a second stirrer (7) and a membrane module (21) are arranged in the membrane biological reaction tank (18); the membrane component (21) is connected with a second liquid flowmeter (9) through a fourth water pump (8) and is connected with a water outlet end; the membrane biological reaction tank (18) is connected with a sludge tank (22) through a third sludge discharge port (20).
The first stirrer (3) and the second stirrer (7) are used for stirring the sludge to prevent the sludge from sinking.
The first thermometer (10) and the second thermometer (16) are used for monitoring the temperature in the system.
The electromagnetic air pump (17) is used for supplying oxygen in the system.
The aeration head (19) is used for supplying oxygen in the system.
The utility model discloses a system for processing waste water is smelted to tungsten has adopted molysite flocculation and precipitation system and two segmentation biological full denitrification processing techniques that integration denitrification MBR system combined together in step, and wherein the first section is molysite flocculation and precipitation section for realize getting rid of As in the waste water, for follow-up biological method microorganism provides safe guarantee, second section formula MBR section As an organic whole, this section uses the high-efficient interception effect of MBR membrane to get rid of nitrogen in the waste water for realizing the denitrification in step, reaches biological full denitrification's purpose.
The biological full denitrification treatment technology of waste water is smelted to tungsten of synchronous nitration denitrification, also called integral type MBR and molysite flocculation combined process to the device that waste water was handled is smelted to tungsten, its characterized in that: the method adopts a two-stage biological full-denitrification treatment technology combining an iron salt flocculation precipitation system and an integrated synchronous nitrification and denitrification MBR system, wherein the first stage is an iron salt flocculation precipitation stage for removing As in the wastewater and providing safety guarantee for microorganisms of a subsequent biological method, and the second stage is an integrated MBR system stage for removing nitrogen in the wastewater by synchronous nitrification and denitrification by using the high-efficiency interception effect of an MBR membrane so As to achieve the purpose of biological full-denitrification.
The system mainly comprises an arsenic removal tank and a sedimentation tank. After the wastewater enters an arsenic removal tank, 20% of H2SO4, FeCl3 & 6H2O and PAM are sequentially added, the temperature and the stirring speed in the reactor are controlled, and the wastewater is subjected to flocculation and precipitation. And after stopping stirring, pumping the supernatant into a settling tank by a peristaltic pump immediately after settling for 30min, further settling in the settling tank, and then sending the supernatant into an integrated MBR system by a pump. And discharging the precipitated flocs to a sludge compressing device through a discharge port for compression treatment.
Second stage integral type MBR system, characterized by: mainly comprises an MBR reaction tank, a membrane component, a fan, an aerator stirrer, a thermometer and the like. The functions are respectively as follows: oxygen is supplied to the system through a blower and an aeration head to provide oxygen for activated sludge; stirring the sludge by using a stirrer to prevent the sludge from sinking; the thermometer monitors the temperature in the system on line; sludge is discharged from the MBR system through the left sludge discharge device; after the wastewater is pumped into the MBR, the effluent is pumped out of the membrane module through a peristaltic pump after being adsorbed and degraded by activated sludge.
The device can adopt the following equipment forms: monomer, disjunctor or integration pond formula structure, monomer, disjunctor or integration pot-type or slot type structure, monomer, disjunctor or integration tower structure, oxidation ditch.
The biofilm in the above device comprises: fixed soft, semi-soft or rigid packings, floating soft, semi-soft or rigid packings, fluidized beds, floating beds.
The oxygen supply form of the device comprises: blast aeration, mechanical aeration and pure oxygen aeration.
The structural materials of the device comprise: reinforced concrete structures, steel structures, non-metallic structures, steel-non-metallic hybrid structures, steel-reinforced concrete hybrid structures, steel-non-metallic-reinforced concrete hybrid structures.
The optimal control conditions of the ferric salt flocculation precipitation system are as follows: FeCl3 is selected, Fe/As =2, the pH is adjusted to 7-8, and the adding amount of PAM is controlled to be 7mg/L wastewater.
The optimal control conditions of the second-stage integrated MBR system are as follows: when DO is controlled to be approximately equal to 1.0mg/L, the C/N is controlled to be 1.5-2.0 by the additional C source, the HRT is about 8h, the pH is controlled to be about 7.3, the SRT =30-40d, the MLSS of the system is maintained to be 5500mg/L to 6000mg/L, MLVSS to be about 4200mg/L, and the sludge activity ratio is about 0.75.
The dynamic model of the synchronous nitrification and denitrification comprises the following steps:
wherein:
the above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. A system for treating tungsten smelting wastewater is characterized by comprising a first water pump (1) and a second water pump
The device comprises a liquid flow meter (2), a first stirrer (3), a second water pump (4), a control computer (5), a third water pump (6), a second stirrer (7), a fourth water pump (8), a second liquid flow meter (9), a first thermometer (10), an arsenic removal tank (11), a first sludge discharge port (12), a sedimentation tank (13), a second sludge discharge port (14), a gas flow meter (15), a second thermometer (16), an electromagnetic air pump (17), a membrane biological reaction tank (18), an aeration head (19), a third sludge discharge port (20), a membrane module (21) and a sludge tank (22);
the water inlet end is connected with a first water pump (1), the first water pump (1) is connected with a first liquid flow meter (2), the first liquid flow meter (2) is connected with an arsenic removal tank (11), and a first thermometer (10) is arranged in the arsenic removal tank (11); the control computer (5) is respectively connected with the first water pump (1), the first liquid flowmeter (2), the second water pump (4), the third water pump (6), the fourth water pump (8) and the second liquid flowmeter (9); the arsenic removal tank (11) is connected with a sludge tank (22) through a first sludge discharge port (12); the second water pump (4) is connected with the sedimentation tank (13), and the sedimentation tank (13) is connected with the third water pump (6); the sedimentation tank (13) is connected with the membrane biological reaction tank (18) through a second sludge discharge port (14), an electromagnetic air pump (17), a gas flowmeter (15) and a second thermometer (16); a second thermometer (16), a second stirrer (7) and a membrane module (21) are arranged in the membrane biological reaction tank (18); the membrane component (21) is connected with a second liquid flowmeter (9) through a fourth water pump (8) and is connected with a water outlet end; the membrane biological reaction tank (18) is connected with a sludge tank (22) through a third sludge discharge port (20).
2. The system for treating waste water from tungsten smelting according to claim 1, wherein the system is used for treating waste water from tungsten smelting
The first stirrer (3) and the second stirrer (7) are used for stirring the sludge to prevent the sludge from sinking.
3. The system for treating waste water from tungsten smelting according to claim 1, wherein the system is used for treating waste water from tungsten smelting
The first thermometer (10) and the second thermometer (16) are used for monitoring the temperature in the system.
4. The system for treating waste water from tungsten smelting according to claim 1, wherein the system is used for treating waste water from tungsten smelting
The electromagnetic air pump (17) is used for supplying oxygen in the system.
5. The system for treating waste water from tungsten smelting according to claim 1, wherein the system is used for treating waste water from tungsten smelting
The aeration head (19) is used for supplying oxygen in the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120644411.XU CN214654326U (en) | 2021-03-30 | 2021-03-30 | A system for treating tungsten smelting wastewater |
Applications Claiming Priority (1)
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