CN211999245U - Arsenic-containing organic wastewater treatment system - Google Patents
Arsenic-containing organic wastewater treatment system Download PDFInfo
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- CN211999245U CN211999245U CN202020684785.XU CN202020684785U CN211999245U CN 211999245 U CN211999245 U CN 211999245U CN 202020684785 U CN202020684785 U CN 202020684785U CN 211999245 U CN211999245 U CN 211999245U
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Abstract
The utility model relates to an organic effluent disposal system of arsenic, including the wastewater disposal basin, still include: the first stirring barrel is connected with the wastewater pool through a pipeline, and an acid adding pipe is arranged in the first stirring barrel; the nano-iron in-situ generation plasma reactor can release nano-iron particles to wastewater, and is provided with a water inlet and a water outlet, wherein the water inlet is connected with a first stirring barrel pipeline; the mixing reaction barrel is connected with a water outlet pipeline of the nano iron in-situ generation plasma reactor, and a hydrogen peroxide adding pipe is arranged in the mixing reaction barrel; the second stirring barrel is connected with the mixed reaction barrel through a pipeline, and an alkali adding pipe is arranged in the second stirring barrel; the third stirring barrel is connected with the second stirring barrel through a pipeline, and a flocculating agent adding pipe is arranged in the third stirring barrel; and the sedimentation tank is connected with a third stirring barrel pipeline. The utility model discloses it is effectual to the arsenic removal of arsenic-containing organic waste water and remove COD, can satisfy the arsenic emission standard that is strict day by day.
Description
Technical Field
The utility model relates to a heavy metal organic waste water treatment technical field, concretely relates to contain arsenic organic waste water treatment system.
Background
Arsenic-containing organic wastewater in an arsenic compound synthesis workshop usually comes from two parts, wherein one part comes from the production process of arsenic products; the second part originates from ground washing water and road rain. As a pollutant, the emission of the arsenic is strictly controlled, and the arsenic is required to be less than 0.1mg/L in the emission standard of industrial pollutants of tin, antimony and mercury (GB 30770-2014) shown in Table 2, and the emission standard is that the arsenic is less than 0.05 mg/L. However, part of the environment has a small capacity or the arsenic emission is subject to total or zero emission. The common arsenic removal methods in industry include chemical precipitation, electric flocculation, arsenic removal resin or adsorbent adsorption, reverse osmosis, evaporative concentration and the like.
In the case of high discharge, the arsenic-containing waste water is treated by adopting a mode of combining various processes, and the method has good arsenic removal effect and can ensure that the concentration of arsenic in the effluent is less than 0.05 mg/L. For example, Chinese patent CN109879477A discloses an arsenic-containing wastewater treatment method, which adopts the processes of adding oxidant, ferric salt, arsenic removal agent, combining a membrane system and catalyzing arsenic removal, and the effluent of the arsenic-containing wastewater can reach less than 0.05 mg/L. However, the method is provided with a plurality of stages of process units, so that the operation and maintenance difficulty is high, the investment and operation cost is high, and the pH is adjusted by acid and alkali for a plurality of times, so that the problem of higher dissolved solids of the effluent is easily caused.
In the case of arsenic-containing organic wastewater, a multi-stage composite treatment process is often adopted, for example, Chinese patent CN102897956A discloses a method for treating high-arsenic-containing wastewater, which adopts a process of removing iron-carbon micro-electrolysis, chemical precipitation and filtration in combination with carbon fiber adsorption, and after treatment, effluent can reach arsenic less than 0.2mg/L and COD less than 100 mg/L. But the surface passivation of the iron-carbon micro-electrolysis iron-carbon is easy to solidify and the regeneration difficulty is high; meanwhile, the effluent arsenic and COD after coagulation are relatively high, so that the existing discharge standard cannot be met.
The national environmental protection policy is increasingly strict, and the total arsenic emission standard is continuously improved. The existing arsenic-containing organic wastewater treatment has obvious defects, and a treatment system which is environment-friendly, economical and efficient and meets high discharge standards is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides an organic effluent disposal system that contains arsenic to prior art's not enough, it removes arsenic and COD is effectual, and mud slag yield is few, can satisfy the arsenic emission standard that is strict day by day.
The utility model discloses a realize through following technical scheme:
the arsenic-containing organic wastewater treatment system comprises a wastewater tank and further comprises:
the first stirring barrel is connected with the wastewater pool through a pipeline, and an acid adding pipe is arranged in the first stirring barrel;
the nano-iron in-situ generation plasma reactor can release nano-iron particles to wastewater, and is provided with a water inlet and a water outlet, wherein the water inlet is connected with a first stirring barrel pipeline;
the mixing reaction barrel is connected with a water outlet pipeline of the nano iron in-situ generation plasma reactor, and a hydrogen peroxide adding pipe is arranged in the mixing reaction barrel;
the second stirring barrel is connected with the mixed reaction barrel through a pipeline, and an alkali adding pipe is arranged in the second stirring barrel;
the third stirring barrel is connected with the second stirring barrel through a pipeline, and a flocculating agent adding pipe is arranged in the third stirring barrel;
and the sedimentation tank is connected with a third stirring barrel pipeline.
According to the scheme, the low-temperature plasma is excited by the pulse power supply, and the low-temperature plasma reacts with the iron shot to generate the nano iron particles in situ, wherein the nano iron particles have good electrochemical, coordination chemical and redox characteristics. The nano iron is in contact reaction with heavy metal (arsenic) through three actions of adsorption, reduction and precipitation/coprecipitation to remove arsenic-containing components in the wastewater, and the arsenic in the arsenic-containing wastewater is separated from the wastewater in a solid form, so that the arsenic removal effect on the arsenic-containing wastewater is realized.
Further, the nano-iron in-situ generation plasma reactor comprises a shell, a partition board is arranged in an inner cavity of the shell, the inner cavity of the shell is divided into a reaction chamber located above and a buffer chamber located below by the partition board, an opening for communicating the reaction chamber with the buffer chamber is formed in the partition board, two electrodes which are oppositely arranged and connected with a high-power pulse power supply are fixed in the inner cavity of the shell in the reaction chamber, iron pills are fully paved between the two electrodes in the reaction chamber, the buffer chamber is provided with a water inlet, and the reaction chamber is provided with a water outlet.
Furthermore, a filter screen is fixed at the opening of the reaction chamber. The filter screen can filter the waste water in the buffer chamber, gets rid of the large granule pollutant, improves the area of contact of nanometer iron and waste water, reinforcing reaction effect.
Furthermore, a sludge discharge port is arranged at the bottom of the sedimentation tank and is connected with a filter press through a pipeline, and a filtrate outlet of the filter press is connected with the wastewater tank through a return pipe.
And the heavy metal ions contained in the sludge are removed by utilizing the circular treatment, so that the pollution of the sludge to the environment is reduced.
Further, stirrers are arranged in the first stirring barrel, the second stirring barrel and the third stirring barrel.
The stirrer is used for stirring the wastewater, so that the reaction in each stirring barrel is sufficient.
The utility model has the advantages that:
the nano-iron with high dispersibility and high reaction activity is generated in situ in the arsenic-containing organic wastewater by utilizing the nano-iron in-situ generation plasma reactor, and is mixed with pollutants almost in zero, so that the utilization rate of the nano-iron is effectively improved, and the application problem that nano-iron particles are extremely easy to oxidize and agglomerate in a short time is solved.
Compared with the traditional treatment method, the scheme does not need to additionally arrange a pre-oxidation process unit to remove COD before arsenic ions are treated, the requirement on the concentration of influent COD is lower, after arsenic-containing wastewater is treated by the scheme, arsenic ions and COD can be synchronously removed, effluent can be directly discharged or recycled after reaching the standard, the process flow is simplified, and the investment and the operation cost are reduced. The sludge yield is low, the sludge components mainly comprise ferric arsenate, iron-arsenic oxide/iron hydroxide and partial nano iron particles, and the sludge treatment cost is reduced.
The arsenic-containing wastewater treated by the treatment system can realize that the concentration of arsenic ions in the effluent is less than 0.1mg/L and the COD is less than 30 mg/L.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural diagram of the nano-iron in-situ generation plasma reactor in fig. 1.
Shown in the figure:
1. the device comprises a wastewater pool, 2, a first stirring barrel, 3, a nano iron in-situ generation plasma reactor, 4, a mixing reaction barrel, 5, a hydrogen peroxide adding pipe, 6, a second stirring barrel, 7, an alkali adding pipe, 8, a third stirring barrel, 9, a flocculating agent adding pipe, 10, a stirrer, 11, a sedimentation tank, 12, a filter press, 13, a backflow pipe, 14, an acid adding pipe, 15, a shell, 16, a partition board, 17, a reaction chamber, 18, a buffer chamber, 19, an opening, 20, an electrode, 21, an iron ball, 22, a filter screen, 23, a water inlet, 24 and a water outlet.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
An arsenic-containing organic wastewater treatment system comprises a wastewater tank 1 and further comprises:
the first stirring barrel 2 is connected with the wastewater pool 1 through a pipeline, and an acid adding pipe 14 is arranged in the first stirring barrel 2;
the nano-iron in-situ generation plasma reactor 3 can release nano-iron particles to wastewater, is provided with a water inlet 23 and a water outlet 24, and the water inlet 23 is connected with the first stirring barrel 2 through a pipeline;
the mixing reaction barrel 4 is connected with a water outlet 24 of the nano iron in-situ generation plasma reactor 3 through a pipeline, and a hydrogen peroxide adding pipe 5 is arranged in the mixing reaction barrel 4;
the second stirring barrel 6 is connected with the mixed reaction barrel 4 through a pipeline, and an alkali adding pipe 7 is arranged in the second stirring barrel 6;
the third stirring barrel 8 is connected with the second stirring barrel 6 through a pipeline, and a flocculating agent adding pipe 9 is arranged in the third stirring barrel 8;
and the sedimentation tank 11 is connected with the third stirring barrel 8 through a pipeline. The bottom of the sedimentation tank 11 is provided with a sludge discharge port, the sludge discharge port is connected with a filter press 12 through a pipeline, and a filtrate outlet of the filter press 12 is connected with the wastewater tank 1 through a return pipe 13.
The first stirring barrel 2, the second stirring barrel 6 and the third stirring barrel 8 are all internally provided with a stirrer 10.
The reactor 3 for in-situ generation of nano-iron comprises a shell 15, a partition 16 is arranged in the inner cavity of the shell 15, the inner cavity of the shell 15 is divided into a reaction chamber 17 positioned above and a buffer chamber 18 positioned below by the partition 16, an opening 19 for communicating the reaction chamber 17 with the buffer chamber 18 is formed in the partition 16, and a filter screen 22 is fixed at the opening 19 of the reaction chamber 17.
Two electrodes 20 which are oppositely arranged and connected with a high-power pulse power supply are fixed in the inner cavity of the shell 15 in the reaction chamber 17, iron shots 21 are fully paved between the two electrodes in the reaction chamber 17, the water inlet 23 is arranged on the buffer chamber 18, and the water outlet 24 is arranged on the reaction chamber 17.
The utility model discloses when using, will contain arsenic organic waste water from wastewater disposal basin 1 let in first agitator 2 in through adding the pH that sulphuric acid adjusted waste water into acidity of acid pipe 14, adjust in the waste water entering nanometer iron normal position generation plasma reactor 3 of pH, with in the waste water normal position generation nanometer iron particle reaction.
After the reaction, the solution in the mixing reaction barrel 4 is introduced into the mixing reaction barrel 4 and H is added through a hydrogen peroxide adding pipe 52O2Carrying out nano-iron/heterogeneous Fenton oxidation reaction until the reaction is finished, and adding H2O2Make H2O2The molar ratio of the metal oxide to the nano iron is proper, and the ORP and the reaction time are controlled.
And after the reaction is finished, introducing the wastewater solution into a second stirring barrel 6, adding sodium hydroxide by using an alkali adding pipe 7, adjusting the pH of the wastewater solution after the reaction to be alkaline, stirring for reaction, introducing the mixed solution into a third stirring barrel 8, adding a flocculating agent, and separating arsenic ions from the wastewater by flocculation and precipitation.
Sludge in the sedimentation tank 11 is discharged through a sludge discharge port and then is treated by a filter press 12, filtrate flows back to the wastewater tank 1 through a return pipe 13, and the sludge is recovered or transported outside after being squeezed.
Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.
Claims (5)
1. The utility model provides an organic waste water treatment system that contains arsenic, includes the wastewater disposal basin, its characterized in that: further comprising:
the first stirring barrel is connected with the wastewater pool through a pipeline, and an acid adding pipe is arranged in the first stirring barrel;
the nano-iron in-situ generation plasma reactor can release nano-iron particles to wastewater, and is provided with a water inlet and a water outlet, wherein the water inlet is connected with a first stirring barrel pipeline;
the mixing reaction barrel is connected with a water outlet pipeline of the nano iron in-situ generation plasma reactor, and a hydrogen peroxide adding pipe is arranged in the mixing reaction barrel;
the second stirring barrel is connected with the mixed reaction barrel through a pipeline, and an alkali adding pipe is arranged in the second stirring barrel;
the third stirring barrel is connected with the second stirring barrel through a pipeline, and a flocculating agent adding pipe is arranged in the third stirring barrel;
and the sedimentation tank is connected with a third stirring barrel pipeline.
2. The arsenic-containing organic wastewater treatment system according to claim 1, wherein: the reactor comprises a shell, a partition board is arranged in the inner cavity of the shell, the inner cavity of the shell is divided into a reaction chamber positioned above and a buffer chamber positioned below by the partition board, an opening for communicating the reaction chamber with the buffer chamber is formed in the partition board, two electrodes which are oppositely arranged and connected with a high-power pulse power supply are fixed in the inner cavity of the shell in the reaction chamber, iron shots are fully paved between the two electrodes in the reaction chamber, and the buffer chamber is provided with a water inlet and a water outlet.
3. The arsenic-containing organic wastewater treatment system according to claim 2, wherein: the reaction chamber is fixed with a filter screen at the opening.
4. The arsenic-containing organic wastewater treatment system according to claim 1, wherein: the bottom of the sedimentation tank is provided with a sludge discharge port, the sludge discharge port is connected with a filter press through a pipeline, and a filtrate outlet of the filter press is connected with a wastewater tank through a return pipe.
5. The arsenic-containing organic wastewater treatment system according to claim 1, wherein: stirrers are arranged in the first stirring barrel, the second stirring barrel and the third stirring barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020684785.XU CN211999245U (en) | 2020-04-29 | 2020-04-29 | Arsenic-containing organic wastewater treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020684785.XU CN211999245U (en) | 2020-04-29 | 2020-04-29 | Arsenic-containing organic wastewater treatment system |
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| CN211999245U true CN211999245U (en) | 2020-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113912163A (en) * | 2021-12-14 | 2022-01-11 | 山东绅联药业有限公司 | Medicine pharmacy effluent treatment plant |
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- 2020-04-29 CN CN202020684785.XU patent/CN211999245U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113912163A (en) * | 2021-12-14 | 2022-01-11 | 山东绅联药业有限公司 | Medicine pharmacy effluent treatment plant |
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