CN112573769B - High-efficiency treatment device and treatment method for industrial coking coal wastewater - Google Patents
High-efficiency treatment device and treatment method for industrial coking coal wastewater Download PDFInfo
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Abstract
The invention discloses an efficient treatment device and a treatment method for industrial coking coal wastewater, wherein the device comprises a multistage stepped grid filtering structure, an oil filtering tank, a deep oil removing tank, a phenol removing tank, a desulfurization aeration reaction tank, an anaerobic biological reaction denitration tank, a pH adjusting tank, a semi-permeable membrane biological reaction spiral tank and a flocculation tank; the method comprises the following steps: s1: carrying out a grid deslagging process on the wastewater, and filtering to remove residues in the wastewater; s2: firstly, removing oil stains on the surface of the wastewater by using an oil removing machine, and further removing oil emulsion drops in the wastewater by using magnetic powder; s3: adding a phenol oxidation catalyst and hydrogen peroxide into the wastewater treated in the step, and then aerating and introducing ozone for oxidation; s4: removing sulfur by adopting a combination method of air oxidation and chlorine addition; the multistage stepped grid filtering structure has better filtering effect, and sulfur elements in the wastewater are removed by an air oxidation and chlorination combined method, so that the sulfur in the wastewater is removed more thoroughly.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an efficient treatment device and a treatment method for industrial coking coal wastewater.
Background
The coal production and consumption are huge, the coal resource is still the main energy source of the coal, a large amount of waste water is generated in the coal production process, if the waste water is not effectively treated, not only is the waste of water resources but also the surrounding ecological environment is threatened, the waste water directly flows into channels, rivers and lakes pollute surface water, if the toxicity is high, the death and even the extinction of aquatic animals and plants can be caused, the waste water can also permeate into underground water to pollute the underground water and further crops, if surrounding residents adopt the polluted surface water or the underground water as domestic water, the body health can be harmed, serious people die, and the waste water permeates into soil to cause soil pollution. The growth of microorganisms in plants and soil is influenced, some industrial wastewater has unpleasant odor and pollutes air, toxic and harmful substances in the wastewater can be remained in the body by the ingestion and absorption of plants and then reach the human body through a food chain, and the harm is caused to the human body.
The existing wastewater treatment method has the problems of secondary pollution, high investment, high operation cost and the like, and is a very important task for efficiently treating wastewater to ensure that the wastewater reaches the environmental protection standard for discharge.
Disclosure of Invention
The invention aims to provide an efficient treatment device and a treatment method for industrial coking coal wastewater, and aims to design the efficient treatment device and the treatment method for the defects existing in the conventional wastewater treatment.
In order to achieve the purpose, the invention provides the following technical scheme:
an industrial coking coal wastewater high-efficiency treatment device comprises a multistage stepped grid filtering structure, an oil filtering tank, a deep oil removal tank, a phenol removal tank, a desulfurization aeration reaction tank, an anaerobic biological reaction denitration tank, a pH adjusting tank, a semipermeable membrane biological reaction spiral tank and a flocculation tank which are connected in sequence;
the multistage stepped grid filtering structure comprises an inclined main body, wherein multistage steps are built on the upper inclined surface of the inclined main body, inclined filtering grids are fixedly arranged at the tops of the steps, a water inlet slot is built at the top of the inclined main body, and a grid wastewater outlet is formed at the step positioned at the lowest position;
the multistage stepped grid filtering structure has the advantages that the obliquely arranged filtering grids can filter residues in waste water more effectively.
The desulfurization aeration reaction tank comprises a desulfurization aeration reaction tank shell, a desulfurization aeration reaction tank water inlet is formed in the position, close to the bottom, of the outer side of the desulfurization aeration reaction tank shell, a desulfurization aeration reaction tank water outlet is formed in the position, close to the top, of the outer side of the desulfurization aeration reaction tank shell, a gas distribution tank is fixedly arranged at the bottom in the desulfurization aeration reaction tank shell, a spiral aeration pipe is fixedly connected to the gas distribution tank and communicated with the inside of the gas distribution tank, a plurality of aeration micropores are formed in the spiral aeration pipe, a gas inlet short pipe is fixedly connected to the bottom of the desulfurization aeration reaction tank shell and communicated with the inside of the gas distribution tank, a chlorine pipe extends along the outer side wall of the spiral aeration pipe, and a plurality of chlorine micropores are formed in the chlorine pipe;
the spiral tank for the biological reaction of the semipermeable membrane comprises a shell of the biological reaction tank, wherein a spiral clapboard is fixedly connected in the shell of the biological reaction tank, a water flow channel is formed between the inner wall of the spiral clapboard and the outer wall of the spiral clapboard, a semipermeable membrane retainer extending along the channel is fixedly connected in the water flow channel, a semipermeable membrane is arranged on the semipermeable membrane retainer, the water flow channel is separated into an outer channel and an inner channel by the semipermeable membrane, the spiral clapboard and the edge of the semipermeable membrane retainer positioned at the spiral center are fixedly connected with clapboards, the clapboards isolate the outer channel from the inner channel and do not communicate with each other, the bottom of the shell of the biological reaction tank is fixedly connected with a waste water outlet and a biological active water outlet, the waste water outlet is communicated with the inner channel, and the biological active water outlet is communicated with the outer channel;
the organic matters in the wastewater selectively pass through the semipermeable membrane, enter the water containing the organic decomposition microorganisms and are decomposed, and the wastewater is not in direct contact with the organic decomposition microorganisms, so that the activity of the wastewater is not influenced by the wastewater.
A flocculant adding joint is fixedly connected to a water inlet of the flocculation tank and comprises a water main pipe, a plurality of water pipes are fixedly connected to the water main pipe, an annular flocculant adding pipe is fixedly connected to the inner wall of each water pipe, and a plurality of flocculant adding holes are formed in the flocculant adding pipe; the outer side of the water main is fixedly connected with a flocculant adding main pipe, the flocculant adding main pipe is communicated with a flocculant adding pipe, and the flocculant adding joint is used for enabling a flocculant to be uniformly mixed with waste water when the flocculant is added, so that the later-stage stirring is more convenient.
The grid waste water outlet is communicated with the water inlet of the oil filtering pool, the water outlet of the oil filtering pool is communicated with the water inlet of the deep oil removing tank, the water outlet of the deep oil removing tank is communicated with the water inlet of the phenol removing tank, the water outlet of the phenol removing tank is communicated with the water inlet of the desulfurization aeration reaction tank, the water outlet of the desulfurization aeration reaction tank is communicated with the water inlet of the anaerobic biological reaction denitration tank, the water outlet of the anaerobic biological reaction denitration tank is communicated with the water inlet of the pH adjusting pool, the water outlet of the pH adjusting pool is communicated with the inner channel, and the waste water outlet is communicated with the flocculating agent adding joint.
Preferably, the air inlet short pipe is connected with a heat insulation short pipe, the heat insulation short pipe is connected with an air heating pipe, the outer side of the air heating pipe is surrounded with an electromagnetic induction heating coil, and the air heating pipe is connected with a main air inlet pipe.
Description of the drawings: the heated air participates in the oxidation reaction, and the oxidation effect can be enhanced by increasing the temperature, so that the sulfur in the wastewater can be removed more thoroughly.
The invention also provides a method for efficiently treating the industrial coking coal wastewater by using the device, which comprises the following steps:
s1: the method comprises the following steps of firstly, carrying out a grid deslagging process on the wastewater, and filtering the wastewater to remove residues in the wastewater by utilizing a multi-stage stepped grid filtering structure through natural fall;
s2: allowing the wastewater to enter an oil filtering pool, standing for 1-2h, removing oil stains on the surface of the wastewater by an oil removing machine, pumping the wastewater into a deep oil removing tank, and adding Fe into the wastewater 2 O 3 Magnetic powder, shaking and stirring, wrapping the magnetic powder with oil emulsion drops in the wastewater, standing for 1h, and settling the oil emulsion drops together with the magnetic powder to further remove the oil emulsion drops in the wastewater;
s3: transferring the wastewater treated in the step into a phenol removing tank, adding a phenol oxidation catalyst and hydrogen peroxide to remove part of the difficultly decomposed pigment in the phenol system, and then aerating and introducing ozone for oxidation to remove the residual phenol substances in the wastewater;
s4: desulfurization and denitrification
Transferring the wastewater treated in the step into a desulfurization aeration reaction tank, removing sulfur by adopting an air oxidation and chlorination combined method, exposing hot air and chlorine gas into the reaction tank slightly, and fully contacting the wastewater with mixed gas for oxidation so as to achieve the purpose of sulfur removal;
then transferring the wastewater into an anaerobic biological reaction denitration tank, adding active mud with denitration microorganisms, reducing by using biological anaerobic reaction under an anoxic condition, and reducing the nitride into ammonia gas to realize denitration treatment;
s5: transferring the wastewater in the step into a pH adjusting tank, adding a pH regulator, and adjusting the pH to 6.5-6.7;
s6: transferring the wastewater in the step into a semipermeable membrane biological reaction spiral tank, wherein the semipermeable membrane can selectively pass ionic compounds, alcohol, acetone, glycerol, glucose, amino acid, cane sugar and other organic matters, the organic matters enter the water containing the organic decomposition microorganisms and then are decomposed, and the water containing the organic decomposition microorganisms circularly flows to degrade the organic matters in the wastewater;
s7: and transferring the wastewater in the steps into a flocculation tank, fixedly connecting a flocculant adding joint to a water inlet of the flocculation tank, adding a flocculant, stirring, filtering the precipitate, and finally discharging water meeting the environmental protection standard.
Preferably, the phenol oxidation catalyst is selected from one or more of peroxidase, tyrosinase, laccase, polyphenol oxidase, lignin peroxidase and manganese peroxidase.
Preferably, the denitrifying microorganism is selected from one or more of denitrifying bacteria, Micrococcus, Achromobacter, Aerobacter, helicobacter and Proteus.
Preferably, the pH regulator is selected from the group consisting of hydrochloric acid, sulfuric acid and NH 4 One or more of Cl.
Preferably, the organic decomposition microorganism is selected from one or more of methane bacteria, nitrobacteria, bacillus megaterium, azotobacter chroococcum, bacillus mucilaginosus, streptomyces microflavus, bacillus subtilis and bacillus licheniformis.
Preferably, the flocculating agent comprises: polyacrylamide, polyaluminium chloride and polyferric sulfate are prepared into 0.1 percent aqueous solution according to the mass ratio of 2:2:1, and 10 g/ton of the aqueous solution is added.
Preferably, the chlorine gas content is 2-5%.
Description of the drawings: the chlorine gas in the content range can effectively participate in the reaction, and the harm caused by the emission of residual chlorine gas into the atmosphere is avoided, so that the energy is saved, and the environment is protected.
Preferably, the hot air temperature is between 150 ℃ and 200 ℃.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structural design and convenient operation, adopts a brand new multistage stepped grid filtering structure to filter residues in the wastewater, has better filtering effect, adopts an air oxidation and chlorination combined method to carry out oxidation to remove sulfur elements in the wastewater, leads the sulfur in the wastewater to be removed more thoroughly, utilizes organic decomposition microorganisms to decompose organic matters in the wastewater, adopts a brand new semipermeable membrane biological reaction spiral tank, and has more efficient actual treatment effect.
Drawings
FIG. 1 is a flow chart of the sewage treatment of the present invention;
FIG. 2 is a schematic structural view of a multi-stage stepped grid filter structure according to the present invention;
FIG. 3 is a front view of the desulfurization aeration retort of the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a front view of a semi-permeable membrane bioreactor spiral tank of the present invention;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a front view of a flocculant addition joint in the present invention;
FIG. 8 is a left side view of FIG. 7;
FIG. 9 is a schematic view of the oil filter of the present invention;
FIG. 10 is a schematic of the phenol removal tank of the present invention;
FIG. 11 is a schematic view of an anaerobic biological reaction denitrification tank in the present invention;
FIG. 12 is a schematic view of a pH adjusting tank in the present invention;
FIG. 13 is a schematic view of a flocculation basin of the present invention;
fig. 14 is a schematic view of a deep skim tank of the present invention.
In the figure, 10-inclined main body, 100-multistage stepped grid filtering structure, 11-steps, 12-filtering grids, 13-water inlet grooves, 14-grid wastewater outlet, 200-desulfurization aeration reaction tank, 20-desulfurization aeration reaction tank shell, 21-desulfurization aeration reaction tank water inlet, 22-desulfurization aeration reaction tank water outlet, 23-air inlet short pipe, 24-gas distribution tank, 25-spiral aeration pipe, 251-aeration micropore, 26-chlorine pipe, 261-chlorine micropore, 27-heat insulation short pipe, 28-air heating pipe, 281-total air inlet pipe, 29-electromagnetic induction heating coil, 300-flocculant adding joint, 30-water main pipe, 31-water pipe, 32-flocculant adding pipe, 32-water main pipe, 321-flocculant adding holes, 33-flocculant adding main pipes, 400-semipermeable membrane biological reaction spiral tanks, 40-biological reaction tank shells, 401-spiral partition plates, 402-water flow channels, 41-semipermeable membrane retainers, 411-semipermeable membranes, 42-outer channels, 43-inner channels, 44-partition plates, 45-wastewater outlets, 46-bioactive water outlets, 90-oil filtering ponds, 91-phenol removing tanks, 92-anaerobic biological reaction denitration tanks, 93-pH adjusting ponds, 94-flocculation ponds and 95-depth oil removing tanks.
Detailed Description
The invention will now be described in detail with reference to fig. 1-14, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
Example 1:
an industrial coking coal wastewater high-efficiency treatment device comprises a multistage stepped grid filtering structure 100, an oil filtering tank 90, a deep oil removal tank 95, a phenols removal tank 91, a desulfurization aeration reaction tank 200, an anaerobic biological reaction denitration tank 92, a pH adjusting tank 93, a semipermeable membrane biological reaction spiral tank 400 and a flocculation tank 94 which are connected in sequence;
the multistage stepped grid filtering structure 100 comprises an inclined main body 10, a multistage step 11 is built on the upper inclined plane of the inclined main body 10, an inclined filtering grid 12 is fixedly arranged at the top of the step 11, a water inlet slot 13 is built at the top of the inclined main body 10, and a grid waste water outlet 14 is arranged at the step 11 positioned at the lowest part;
the desulfurization aeration reaction tank 200 comprises a desulfurization aeration reaction tank shell 20, a desulfurization aeration reaction tank water inlet 21 is arranged at the position, close to the bottom, of the outer side of the desulfurization aeration reaction tank shell 20, a desulfurization aeration reaction tank water outlet 22 is arranged at the position, close to the top, of the outer side of the desulfurization aeration reaction tank shell 20, a gas distribution tank 24 is fixedly arranged at the bottom in the desulfurization aeration reaction tank shell 20, a spiral aeration pipe 25 is fixedly connected to the gas distribution tank 24, the spiral aeration pipe 25 is communicated with the inside of the gas distribution tank 24, a plurality of aeration micropores 251 are arranged on the spiral aeration pipe 25, a gas inlet short pipe 23 is fixedly connected to the bottom of the desulfurization aeration reaction tank shell 20, the gas inlet short pipe 23 is communicated with the inside of the gas distribution tank 24, and a chlorine pipe 26 is arranged along the outer side wall of the spiral aeration pipe 25 in an extending manner, the chlorine pipe 26 is provided with a plurality of chlorine micropores 261, the air inlet short pipe 23 is connected with a heat insulation short pipe 27, the heat insulation short pipe 27 is connected with an air heating pipe 28, the outer side of the air heating pipe 28 is surrounded with an electromagnetic induction heating coil 29, and the air heating pipe 28 is connected with a total air inlet pipe 281.
The semi-permeable membrane biological reaction spiral tank 400 comprises a biological reaction tank shell 40, a spiral clapboard 401 is fixedly connected and arranged in the biological reaction tank shell 40, a water flow channel 402 is formed between the inner wall and the outer wall of the spiral clapboard 401, a semipermeable membrane retainer 41 extending along the channel is fixedly connected in the water flow channel 402, a semipermeable membrane 411 is arranged on the semipermeable membrane retainer, the semipermeable membrane 411 divides the water flow channel 402 into an outer channel 42 and an inner channel 43, a partition plate 44 is fixedly connected between the spiral partition plate 401 and the edge of the semi-permeable membrane retainer 41 at the center of the spiral, the baffle plate 44 isolates and does not communicate with the outer channel 42 and the inner channel 43, the bottom of the biological reaction tank shell 40 is fixedly connected with a waste water outlet 45 and a bioactive water outlet 46, the waste water outlet 45 is communicated with the inner channel 43, and the bioactive water outlet 46 is communicated with the outer channel 42;
a flocculant adding joint 300 is fixedly connected to a water inlet of the flocculation tank 94, the flocculant adding joint 300 comprises a water main 30, the water main 30 is fixedly connected with a plurality of water pipes 31, an annular flocculant adding pipe 32 is fixedly connected to the inner wall of each water pipe 31, and a plurality of flocculant adding holes 321 are formed in the flocculant adding pipe 32; a flocculant adding main pipe 33 is fixedly connected to the outer side of the water passing main pipe 30, and the flocculant adding main pipe 33 is communicated with the flocculant adding pipe 32;
the grid wastewater outlet 14 is communicated with a water inlet of the oil filtering tank 90, a water outlet of the oil filtering tank 90 is communicated with a water inlet of the deep oil removing tank 95, a water outlet of the deep oil removing tank 95 is communicated with a water inlet of the phenol removing tank 91, a water outlet of the phenol removing tank 91 is communicated with a water inlet 21 of the desulfurization aeration reaction tank, a water outlet 22 of the desulfurization aeration reaction tank is communicated with a water inlet of the anaerobic biological reaction denitration tank 92, a water outlet of the anaerobic biological reaction denitration tank 92 is communicated with a water inlet of the pH adjusting tank 93, a water outlet of the pH adjusting tank 93 is communicated with the inner channel 43, and the wastewater outlet 45 is communicated with the flocculant adding connector 300.
The method for efficiently treating the industrial coking coal wastewater by using the device comprises the following steps:
s1: the waste water is subjected to a grid deslagging process, and the waste water passes through a multi-stage stepped grid filtering structure 100 by utilizing natural fall to filter and remove residues in the waste water;
s2: the wastewater enters an oil filtering pool 90, stands for 1h, is cleaned of oil stains on the surface of the wastewater by an oil removing machine, is pumped into a deep oil removing tank 95, and is added with Fe 2 O 3 Magnetic powder, vibrating and stirring, wrapping the magnetic powder with oil emulsion drops in the wastewater, standing for 1h, and settling the oil emulsion drops together with the magnetic powder to further remove the oil emulsion drops in the wastewater;
s3: transferring the wastewater treated in the above steps into a phenol removing tank 91, adding a phenol oxidation catalyst and hydrogen peroxide to remove a part of the difficultly decomposed pigment in the phenol system, aerating, introducing ozone for oxidation,
further removing the residual phenolic substances in the wastewater;
s4: desulfurization and denitrification
Transferring the wastewater treated in the step into a desulfurization aeration reaction tank 200, removing sulfur by adopting an air oxidation and chlorination combined method, exposing hot air with the temperature of 150 ℃ and chlorine with the content of 2% into the reaction tank slightly, and fully contacting the wastewater with mixed gas for oxidation so as to achieve the purpose of removing sulfur;
then, transferring the wastewater into an anaerobic biological reaction denitration tank 92, adding active mud with denitration microorganisms, reducing by using biological anaerobic reaction under an anoxic condition, and reducing the nitride into ammonia gas to realize denitration treatment;
s5: transferring the wastewater in the step into a pH adjusting tank 93, adding a pH adjusting agent, and adjusting the pH to 6.5;
s6: transferring the wastewater in the above steps into a semipermeable membrane biological reaction spiral tank 400, wherein the semipermeable membrane can selectively pass ionic compounds, alcohol, acetone, glycerol, glucose, amino acid, sucrose and other organic matters, the organic matters enter the water containing organic decomposition microorganisms and then are decomposed, and the water containing the organic decomposition microorganisms circularly flows to degrade the organic matters in the wastewater;
s7: and transferring the wastewater in the steps into a flocculation tank 94, fixedly connecting a flocculant adding joint to a water inlet of the flocculation tank, adding a flocculant, stirring, filtering the precipitate, and finally discharging water meeting the environmental protection standard.
The phenol oxidation catalyst is peroxidase.
The denitrifying microorganism is denitrifying bacteria.
The pH regulator is hydrochloric acid.
The organic decomposition microorganism is methane bacteria.
The flocculant is polyacrylamide, and is prepared into 0.1% aqueous solution which is added according to the proportion of 10 g/ton.
Example 2:
an industrial coking coal wastewater high-efficiency treatment device comprises a multistage stepped grid filtering structure 100, an oil filtering tank 90, a deep oil removal tank 95, a phenol removal tank 91, a desulfurization aeration reaction tank 200, an anaerobic biological reaction denitration tank 92, a pH adjusting tank 93, a semi-permeable membrane biological reaction spiral tank 400 and a flocculation tank 94 which are connected in sequence;
the multistage stepped grid filtering structure 100 comprises an inclined main body 10, a multistage step 11 is built on the upper inclined plane of the inclined main body 10, an inclined filtering grid 12 is fixedly arranged at the top of the step 11, a water inlet slot 13 is built at the top of the inclined main body 10, and a grid waste water outlet 14 is arranged at the step 11 positioned at the lowest part;
the desulfurization aeration reaction tank 200 comprises a desulfurization aeration reaction tank shell 20, a desulfurization aeration reaction tank water inlet 21 is arranged at the position, close to the bottom, of the outer side of the desulfurization aeration reaction tank shell 20, a desulfurization aeration reaction tank water outlet 22 is arranged at the position, close to the top, of the outer side of the desulfurization aeration reaction tank shell 20, a gas distribution tank 24 is fixedly arranged at the bottom in the desulfurization aeration reaction tank shell 20, a spiral aeration pipe 25 is fixedly connected to the gas distribution tank 24, the spiral aeration pipe 25 is communicated with the inside of the gas distribution tank 24, a plurality of aeration micropores 251 are arranged on the spiral aeration pipe 25, a gas inlet short pipe 23 is fixedly connected to the bottom of the desulfurization aeration reaction tank shell 20, the gas inlet short pipe 23 is communicated with the inside of the gas distribution tank 24, and a chlorine pipe 26 is arranged along the outer side wall of the spiral aeration pipe 25 in an extending manner, the chlorine pipe 26 is provided with a plurality of chlorine micropores 261, the air inlet short pipe 23 is connected with a heat insulation short pipe 27, the heat insulation short pipe 27 is connected with an air heating pipe 28, the outer side of the air heating pipe 28 is surrounded with an electromagnetic induction heating coil 29, and the air heating pipe 28 is connected with a total air inlet pipe 281.
The semi-permeable membrane biological reaction spiral tank 400 comprises a biological reaction tank shell 40, a spiral clapboard 401 is fixedly connected and arranged in the biological reaction tank shell 40, a water flow channel 402 is formed between the inner wall and the outer wall of the spiral clapboard 401, a semipermeable membrane retainer 41 extending along the channel is fixedly connected in the water flow channel 402, a semipermeable membrane 411 is arranged on the semipermeable membrane retainer, the semipermeable membrane 411 divides the water flow channel 402 into an outer channel 42 and an inner channel 43, a partition plate 44 is fixedly connected between the spiral partition plate 401 and the edge of the semi-permeable membrane retainer 41 at the center of the spiral, the baffle plate 44 isolates and does not communicate with the outer channel 42 and the inner channel 43, the bottom of the biological reaction tank shell 40 is fixedly connected with a waste water outlet 45 and a bioactive water outlet 46, the waste water outlet 45 is communicated with the inner channel 43, and the bioactive water outlet 46 is communicated with the outer channel 42;
a flocculant adding joint 300 is fixedly connected to a water inlet of the flocculation tank 94, the flocculant adding joint 300 comprises a water main 30, the water main 30 is fixedly connected with a plurality of water pipes 31, an annular flocculant adding pipe 32 is fixedly connected to the inner wall of each water pipe 31, and a plurality of flocculant adding holes 321 are formed in the flocculant adding pipe 32; a flocculant adding main pipe 33 is fixedly connected to the outer side of the water passing main pipe 30, and the flocculant adding main pipe 33 is communicated with the flocculant adding pipe 32;
the grid wastewater outlet 14 is communicated with a water inlet of the oil filtering tank 90, a water outlet of the oil filtering tank 90 is communicated with a water inlet of the deep oil removing tank 95, a water outlet of the deep oil removing tank 95 is communicated with a water inlet of the phenol removing tank 91, a water outlet of the phenol removing tank 91 is communicated with a water inlet 21 of the desulfurization aeration reaction tank, a water outlet 22 of the desulfurization aeration reaction tank is communicated with a water inlet of the anaerobic biological reaction denitration tank 92, a water outlet of the anaerobic biological reaction denitration tank 92 is communicated with a water inlet of the pH adjusting tank 93, a water outlet of the pH adjusting tank 93 is communicated with the inner channel 43, and the wastewater outlet 45 is communicated with the flocculant adding connector 300.
The method for efficiently treating the industrial coking coal wastewater by using the device comprises the following steps:
s1: the waste water is subjected to a grid deslagging process, and the waste water passes through a multi-stage stepped grid filtering structure 100 by utilizing natural fall to filter and remove residues in the waste water;
s2: the wastewater enters an oil filtering pool 90, is kept stand for 1.5h, is subjected to oil stain removal on the surface of the wastewater by an oil removing machine, is pumped into a deep oil removing tank 95, and is added with Fe 2 O 3 Magnetic powder, shaking and stirring, wrapping the magnetic powder with oil emulsion drops in the wastewater, standing for 1h, and settling the oil emulsion drops together with the magnetic powder to further remove the oil emulsion drops in the wastewater;
s3: transferring the wastewater treated in the step into a phenol removing tank 91, adding a phenol oxidation catalyst and hydrogen peroxide to remove part of the difficultly decomposed pigments in the phenol system, and then aerating and introducing ozone for oxidation to remove the residual phenol substances in the wastewater;
s4: desulfurization and denitrification
Transferring the wastewater treated in the step into a desulfurization aeration reaction tank 200, removing sulfur by adopting an air oxidation and chlorination combined method, exposing hot air with the temperature of 180 ℃ and chlorine with the content of 3% into the reaction tank slightly, and fully contacting the wastewater with mixed gas for oxidation so as to achieve the purpose of removing sulfur;
then, transferring the wastewater into an anaerobic biological reaction denitration tank 92, adding active mud with denitration microorganisms, reducing by using biological anaerobic reaction under an anoxic condition, and reducing the nitride into ammonia gas to realize denitration treatment;
s5: transferring the wastewater in the step into a pH adjusting tank 93, adding a pH regulator, and adjusting the pH to 6.6;
s6: transferring the wastewater in the above steps into a semipermeable membrane biological reaction spiral tank 400, wherein the semipermeable membrane can selectively pass ionic compounds, alcohol, acetone, glycerol, glucose, amino acid, sucrose and other organic matters, the organic matters enter the water containing organic decomposition microorganisms and then are decomposed, and the water containing the organic decomposition microorganisms circularly flows to degrade the organic matters in the wastewater;
s7: and transferring the wastewater in the steps into a flocculation tank 94, fixedly connecting a flocculant adding joint to a water inlet of the flocculation tank, adding a flocculant, stirring, filtering the precipitate, and finally discharging water meeting the environmental protection standard.
The phenol oxidation catalyst is prepared by mixing peroxidase, tyrosinase and laccase in a mass ratio of 1:1: 1.
The denitrifying microorganism is denitrifying bacteria, micrococcus and achromobacter which are mixed according to the mass ratio of 1:1: 1.
The pH regulator is hydrochloric acid.
The organic decomposition microorganisms are methane bacteria, nitrobacteria, bacillus megaterium and azotobacter chroococcum which are mixed according to the mass ratio of 3:2:1: 2.
The flocculant is polyacrylamide, and is prepared into 0.1% aqueous solution which is added according to the proportion of 10 g/ton.
Example 3:
an industrial coking coal wastewater high-efficiency treatment device comprises a multistage stepped grid filtering structure 100, an oil filtering tank 90, a deep oil removal tank 95, a phenol removal tank 91, a desulfurization aeration reaction tank 200, an anaerobic biological reaction denitration tank 92, a pH adjusting tank 93, a semi-permeable membrane biological reaction spiral tank 400 and a flocculation tank 94 which are connected in sequence;
the multistage stepped grid filtering structure 100 comprises an inclined main body 10, a multistage step 11 is built on the upper inclined plane of the inclined main body 10, an inclined filtering grid 12 is fixedly arranged at the top of the step 11, a water inlet slot 13 is built at the top of the inclined main body 10, and a grid waste water outlet 14 is arranged at the step 11 positioned at the lowest part;
the desulfurization aeration reaction tank 200 comprises a desulfurization aeration reaction tank shell 20, a desulfurization aeration reaction tank water inlet 21 is arranged at the position, close to the bottom, of the outer side of the desulfurization aeration reaction tank shell 20, a desulfurization aeration reaction tank water outlet 22 is arranged at the position, close to the top, of the outer side of the desulfurization aeration reaction tank shell 20, a gas distribution tank 24 is fixedly arranged at the bottom in the desulfurization aeration reaction tank shell 20, a spiral aeration pipe 25 is fixedly connected to the gas distribution tank 24, the spiral aeration pipe 25 is communicated with the inside of the gas distribution tank 24, a plurality of aeration micropores 251 are arranged on the spiral aeration pipe 25, a gas inlet short pipe 23 is fixedly connected to the bottom of the desulfurization aeration reaction tank shell 20, the gas inlet short pipe 23 is communicated with the inside of the gas distribution tank 24, and a chlorine pipe 26 is arranged along the outer side wall of the spiral aeration pipe 25 in an extending manner, the chlorine pipe 26 is provided with a plurality of chlorine micropores 261, the air inlet short pipe 23 is connected with a heat insulation short pipe 27, the heat insulation short pipe 27 is connected with an air heating pipe 28, the outer side of the air heating pipe 28 is surrounded with an electromagnetic induction heating coil 29, and the air heating pipe 28 is connected with a total air inlet pipe 281.
The semi-permeable membrane biological reaction spiral tank 400 comprises a biological reaction tank shell 40, a spiral clapboard 401 is fixedly connected and arranged in the biological reaction tank shell 40, a water flow channel 402 is formed between the inner wall and the outer wall of the spiral clapboard 401, a semipermeable membrane retainer 41 extending along the channel is fixedly connected in the water flow channel 402, a semipermeable membrane 411 is arranged on the semipermeable membrane retainer, the semipermeable membrane 411 divides the water flow channel 402 into an outer channel 42 and an inner channel 43, a partition plate 44 is fixedly connected between the spiral partition plate 401 and the edge of the semipermeable membrane holding frame 41 at the center of the spiral, the baffle plate 44 isolates and does not communicate with the outer channel 42 and the inner channel 43, the bottom of the biological reaction tank shell 40 is fixedly connected with a waste water outlet 45 and a bioactive water outlet 46, the waste water outlet 45 is communicated with the inner channel 43, and the bioactive water outlet 46 is communicated with the outer channel 42;
a flocculant adding joint 300 is fixedly connected to a water inlet of the flocculation tank 94, the flocculant adding joint 300 comprises a water main 30, the water main 30 is fixedly connected with a plurality of water pipes 31, an annular flocculant adding pipe 32 is fixedly connected to the inner wall of each water pipe 31, and a plurality of flocculant adding holes 321 are formed in the flocculant adding pipe 32; a flocculant adding main pipe 33 is fixedly connected to the outer side of the water passing main pipe 30, and the flocculant adding main pipe 33 is communicated with the flocculant adding pipe 32;
the grid wastewater outlet 14 is communicated with a water inlet of the oil filtering tank 90, a water outlet of the oil filtering tank 90 is communicated with a water inlet of the deep oil removing tank 95, a water outlet of the deep oil removing tank 95 is communicated with a water inlet of the phenol removing tank 91, a water outlet of the phenol removing tank 91 is communicated with a water inlet 21 of the desulfurization aeration reaction tank, a water outlet 22 of the desulfurization aeration reaction tank is communicated with a water inlet of the anaerobic biological reaction denitration tank 92, a water outlet of the anaerobic biological reaction denitration tank 92 is communicated with a water inlet of the pH adjusting tank 93, a water outlet of the pH adjusting tank 93 is communicated with the inner channel 43, and the wastewater outlet 45 is communicated with the flocculant adding connector 300.
The method for efficiently treating the industrial coking coal wastewater by using the device comprises the following steps:
s1: the waste water is subjected to a grid deslagging process, and the waste water passes through a multi-stage stepped grid filtering structure 100 by utilizing natural fall to filter and remove residues in the waste water;
s2: the wastewater enters an oil filtering pool 90, stands for 2 hours, is cleaned of oil stains on the surface of the wastewater by an oil removing machine, is pumped into a deep oil removing tank 95, and is added with Fe 2 O 3 Magnetic powder, vibrating and stirring, wrapping the magnetic powder with oil emulsion drops in the wastewater, standing for 1h, and settling the oil emulsion drops together with the magnetic powder to further remove the oil emulsion drops in the wastewater;
s3: transferring the wastewater treated in the step into a phenol removing tank 91, adding a phenol oxidation catalyst and hydrogen peroxide to remove part of the difficultly decomposed pigments in the phenol system, and then aerating and introducing ozone for oxidation to remove the residual phenol substances in the wastewater;
s4: desulfurization and denitrification
Transferring the wastewater treated in the step into a desulfurization aeration reaction tank 200, removing sulfur by adopting an air oxidation and chlorination combined method, exposing hot air with the temperature of 200 ℃ and chlorine with the content of 5% into the reaction tank slightly, and fully contacting the wastewater with mixed gas for oxidation so as to achieve the purpose of removing sulfur;
then, transferring the wastewater into an anaerobic biological reaction denitration tank 92, adding active mud with denitration microorganisms, reducing by using biological anaerobic reaction under an anoxic condition, and reducing the nitride into ammonia gas to realize denitration treatment;
s5: transferring the wastewater in the step into a pH adjusting tank 93, adding a pH adjusting agent, and adjusting the pH to 6.7;
s6: transferring the wastewater in the above steps into a semipermeable membrane biological reaction spiral tank 400, wherein the semipermeable membrane can selectively pass ionic compounds, alcohol, acetone, glycerol, glucose, amino acid, sucrose and other organic matters, the organic matters enter the water containing organic decomposition microorganisms and then are decomposed, and the water containing the organic decomposition microorganisms circularly flows to degrade the organic matters in the wastewater;
s7: and transferring the wastewater in the steps into a flocculation tank 94, fixedly connecting a flocculant adding joint to a water inlet of the flocculation tank, adding a flocculant, stirring, filtering the precipitate, and finally discharging water meeting the environmental protection standard.
The phenol oxidation catalyst is formed by mixing peroxidase, polyphenol oxidase and lignin peroxidase according to the mass ratio of 1:1: 1.
The denitrifying microorganisms are denitrifying bacteria, aerobacter, helicobacter and proteus which are mixed according to the mass ratio of 1:1:1: 1.
The pH regulator is sulfuric acid.
The organic decomposition microorganisms are methane bacteria, bacillus mucilaginosus, streptomyces microflavus, bacillus subtilis and bacillus licheniformis which are mixed according to the mass ratio of 3:2:1:2: 1.
The flocculant is polyaluminium chloride, is prepared into 0.1 percent aqueous solution, and is added according to the proportion of 10 g/ton.
In the practical application process of the invention, the wastewater is injected from the water inlet slot 13, the wastewater flows down along the ladder 11, when the wastewater passes through the filter grid 12, the residue in the wastewater is intercepted by the filter grid 12, and finally the wastewater is discharged from the grid wastewater outlet 14;
the waste water from the grid waste water outlet 14 enters an oil filtering tank 90, is subjected to oil filtering treatment and then is transferred into a deep oil removal tank 95 to further remove oil liquid droplets in the waste water, the waste water after being subjected to deep oil removal tank treatment is transferred into a phenol removal tank 91 to remove phenols in the waste water, the waste water enters the desulfurization aeration reaction tank shell 20 through a desulfurization aeration reaction tank water inlet 21, air is introduced into the air heating pipe 28, the air heating pipe 28 is heated under the action of the electromagnetic induction heating coil 29, the air flowing through the air heating pipe 28 is also heated, the air enters the gas distribution tank 24 through the heat insulation short pipe 27 and the air inlet short pipe 23, the air in the gas distribution tank 24 then enters the spiral aeration pipe 25 and is finally discharged from the aeration micropores 251, the chlorine gas is introduced into the chlorine gas pipe 26 and then discharged from the chlorine micropores 261, and the heated air discharged from the aeration micropores 251 and the chlorine gas discharged from the chlorine micropores 261 enable sulfur-containing substances in the waste water to be further removed through the chlorine gas discharged from the heating air distribution tank 251 and the chlorine micropores 261 Oxidizing to form sulfide which is difficult to dissolve in water, thereby achieving the aim of desulfurization;
the treated wastewater is discharged from a water outlet 22 of the desulfurization aeration reaction tank and then enters the desulfurization aeration reaction tank 200 for denitration treatment, the wastewater after denitration treatment enters a pH adjusting tank 93 for pH adjustment, the wastewater after pH adjustment is treated in a semipermeable membrane biological reaction spiral tank 400, the wastewater is injected into an inner channel 43, water containing organic decomposition microorganisms is injected into an outer channel 42, organic matters in the wastewater can pass through a semipermeable membrane 411 to enter the outer channel 42 and then be decomposed, the treated wastewater is discharged from a wastewater outlet 45, and the water containing the organic decomposition microorganisms is discharged from a bioactive water outlet 46 and then is circularly injected into the outer channel 42;
the wastewater discharged from the wastewater outlet 45 enters the flocculation tank 94 through the flocculant adding connector 300 on the water inlet of the flocculation tank, the flocculant is injected from the flocculant adding header pipe 33, the flocculant enters the flocculant adding pipe 32 and then is discharged from the flocculant adding hole 321, the wastewater is mixed with the flocculant when flowing through the water flowing pipe 31, the wastewater mixed with the flocculant enters the flocculation tank, and the wastewater is discharged after stirring and sedimentation.
Claims (8)
1. An efficient treatment device for industrial coking coal wastewater is characterized by comprising a multistage stepped grid filtering structure (100), an oil filtering tank (90), a deep oil removing tank (95), a phenol removing tank (91), a desulfurization aeration reaction tank (200), an anaerobic biological reaction denitration tank (92), a pH adjusting tank (93), a semipermeable membrane biological reaction spiral tank (400) and a flocculation tank (94) which are sequentially connected;
the multistage stepped grid filtering structure (100) comprises an inclined main body (10), multistage steps (11) are built on the upper inclined surface of the inclined main body (10), inclined filtering grids (12) are fixedly arranged at the tops of the steps (11), a water inlet notch (13) is built at the top of the inclined main body (10), and a grid waste water outlet (14) is formed in the step (11) located at the lowest part;
the desulfurization aeration reaction tank (200) comprises a desulfurization aeration reaction tank shell (20), a desulfurization aeration reaction tank water inlet (21) is arranged at the position, close to the bottom, of the outer side of the desulfurization aeration reaction tank shell (20), a desulfurization aeration reaction tank water outlet (22) is arranged at the position, close to the top, of the outer side of the desulfurization aeration reaction tank shell (20), a gas distribution tank (24) is fixedly arranged at the bottom in the desulfurization aeration reaction tank shell (20), a spiral aeration pipe (25) is fixedly connected to the gas distribution tank (24), the spiral aeration pipe (25) is communicated with the inside of the gas distribution tank (24), a plurality of aeration micropores (251) are arranged on the spiral aeration pipe (25), a gas inlet short pipe (23) is fixedly connected to the bottom of the desulfurization aeration reaction tank shell (20), and the gas inlet short pipe (23) is communicated with the inside of the gas tank (24), a chlorine pipe (26) extends along the outer side wall of the spiral aerator pipe (25), and the chlorine pipe (26) is provided with a plurality of chlorine micropores (261);
semipermeable membrane biological reaction spiral case (400) includes bioreactor casing (40), fixed connection is equipped with spiral baffle (401) in bioreactor casing (40), form rivers passageway (402) between spiral baffle (401) inner wall and the outer wall, rivers passageway (402) internal fixation connects and is equipped with pellicle holder (41) that extends along its passageway, be equipped with pellicle (411) on the pellicle holder, pellicle (411) will rivers passageway (402) are separated for outer passageway (42) and interior passageway (43), spiral baffle (401) with pellicle holder (41) is located fixedly connected with baffle (44) between the edge at spiral center, baffle (44) will outer passageway (42) and interior passageway (43) are completely cut off not to communicate with each other, bioreactor casing (40) bottom fixed connection is equipped with waste water outlet (45) and bioactive water outlet (46), the waste water outlet (45) is communicated with the inner channel (43), and the bioactive water outlet (46) is communicated with the outer channel (42);
a flocculant adding joint (300) is fixedly connected to a water inlet of the flocculation tank (94), the flocculant adding joint (300) comprises a water main (30), the water main (30) is fixedly connected with a plurality of water pipes (31), the inner wall of each water pipe (31) is fixedly connected with an annular flocculant adding pipe (32), and a plurality of flocculant adding holes (321) are formed in each flocculant adding pipe (32); a flocculant adding main pipe (33) is fixedly connected to the outer side of the water main pipe (30), and the flocculant adding main pipe (33) is communicated with the flocculant adding pipe (32);
the grid wastewater outlet (14) is communicated with a water inlet of the oil filtering pool (90), a water outlet of the oil filtering pool (90) is communicated with a water inlet of the deep oil removing tank (95), a water outlet of the deep oil removing tank (95) is communicated with a water inlet of the phenol removing tank (91), a water outlet of the phenol removing tank (91) is communicated with a water inlet (21) of the desulfurization aeration reaction tank, a water outlet (22) of the desulfurization aeration reaction tank is communicated with a water inlet of the anaerobic biological reaction denitration tank (92), a water outlet of the anaerobic biological reaction denitration tank (92) is communicated with a water inlet of the pH adjusting pool (93), a water outlet of the pH adjusting pool (93) is communicated with the inner channel (43), and the wastewater outlet (45) is communicated with the flocculant adding joint (300);
the air inlet short pipe (23) is connected with a heat insulation short pipe (27), the heat insulation short pipe (27) is connected with an air heating pipe (28), the outer side of the air heating pipe (28) is surrounded with an electromagnetic induction heating coil (29), and the air heating pipe (28) is connected with a total air inlet pipe (281);
the method for efficiently treating the industrial coking coal wastewater by the device comprises the following steps:
s1: the waste water is subjected to a grid deslagging process, and the waste water passes through a multi-stage stepped grid filtering structure (100) by utilizing natural fall to filter and remove residues in the waste water;
s2: the wastewater enters an oil filtering pool (90), is kept stand for 1-2h, is cleaned of oil stains on the surface of the wastewater by an oil removing machine, is pumped into a deep oil removing tank (95), and is added with Fe 2 O 3 Magnetic powder, vibrating and stirring, wrapping the magnetic powder with oil emulsion drops in the wastewater, standing for 1h, and settling the oil emulsion drops together with the magnetic powder to further remove the oil emulsion drops in the wastewater;
s3: transferring the wastewater treated in the step into a phenol removing tank (91), adding a phenol oxidation catalyst and hydrogen peroxide to remove part of the difficultly decomposed pigment in the phenol system, and then aerating and introducing ozone for oxidation to remove the residual phenol substances in the wastewater;
s4: desulfurization and denitrification
Transferring the wastewater treated in the step into a desulfurization aeration reaction tank (200), aerating hot air and chlorine gas into the desulfurization aeration reaction tank (200), and fully contacting the wastewater with mixed gas for oxidation so as to achieve the aim of removing sulfur;
then transferring the wastewater into an anaerobic biological reaction denitration tank (92), adding active mud with denitration microorganisms, reducing by using biological anaerobic reaction under an anoxic condition, and reducing the nitride into ammonia gas to realize denitration treatment;
s5: transferring the wastewater in the step into a pH adjusting tank (93), adding a pH adjusting agent, and adjusting the pH to 6.5-6.7;
s6: transferring the wastewater in the steps into a semipermeable membrane biological reaction spiral tank (400), wherein the semipermeable membrane can selectively pass ionic compounds, alcohol, acetone, glycerol, glucose, amino acid and cane sugar organic matters, the organic matters enter the water containing the organic decomposition microorganisms and then are decomposed, and the water containing the organic decomposition microorganisms circularly flows to degrade the organic matters in the wastewater;
s7: and transferring the wastewater in the step into a flocculation tank (94), fixedly connecting a flocculating agent adding joint to a water inlet of the flocculation tank, adding a flocculating agent, stirring, filtering the precipitate, and finally discharging water meeting the environmental protection standard.
2. The high-efficiency treatment device for industrial coking coal wastewater according to claim 1, characterized in that: the phenol oxidation catalyst is selected from one or more of peroxidase, tyrosinase, laccase, polyphenol oxidase, lignin peroxidase and manganese peroxidase.
3. The high-efficiency treatment device for industrial coking coal wastewater according to claim 1, characterized in that: the denitrifying microorganism is selected from one or more of denitrifying bacteria, micrococcus, Achromobacter, Aerobacter, Spirobacterium and Proteus.
4. The high-efficiency treatment device for industrial coking coal wastewater according to claim 1, characterized in that: the pH regulator is selected from hydrochloric acid, sulfuric acid and NH 4 One or more of Cl.
5. The high-efficiency treatment device for industrial coking coal wastewater according to claim 1, characterized in that: the organic decomposition microorganism is one or more than one selected from methane bacteria, nitrobacteria, bacillus megaterium, azotobacter chroococcum, bacillus mucilaginosus, streptomyces microflavus, bacillus subtilis and bacillus licheniformis.
6. The high-efficiency treatment device for industrial coking coal wastewater according to claim 1, characterized in that: the flocculant comprises: polyacrylamide, polyaluminium chloride and polyferric sulfate are prepared into 0.1 percent aqueous solution according to the mass ratio of 2:2:1, and 10 g/ton of the aqueous solution is added.
7. The high-efficiency treatment device for industrial coking coal wastewater according to claim 1, characterized in that: the volume content of the chlorine gas is 2-5%.
8. The high-efficiency treatment device for industrial coking coal wastewater according to claim 1, characterized in that: the temperature of the hot air is between 150 ℃ and 200 ℃.
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| CN110498569A (en) * | 2019-08-30 | 2019-11-26 | 四川达兴能源股份有限公司 | A kind of advanced treatment system and processing method of coking wastewater |
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