CN110818083A - Realize integral type reactor of resourceful denitrogenation sulphur removal - Google Patents
Realize integral type reactor of resourceful denitrogenation sulphur removal Download PDFInfo
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- CN110818083A CN110818083A CN201911222717.XA CN201911222717A CN110818083A CN 110818083 A CN110818083 A CN 110818083A CN 201911222717 A CN201911222717 A CN 201911222717A CN 110818083 A CN110818083 A CN 110818083A
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 239000005864 Sulphur Substances 0.000 title claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 103
- 238000006243 chemical reaction Methods 0.000 claims abstract description 63
- 238000009826 distribution Methods 0.000 claims abstract description 50
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 44
- 239000011593 sulfur Substances 0.000 claims abstract description 44
- 238000005192 partition Methods 0.000 claims abstract description 22
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 19
- 230000023556 desulfurization Effects 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 238000012856 packing Methods 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 230000001651 autotrophic effect Effects 0.000 claims abstract description 10
- 241000894006 Bacteria Species 0.000 claims abstract description 6
- 239000002351 wastewater Substances 0.000 claims description 46
- 229910002651 NO3 Inorganic materials 0.000 claims description 21
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 12
- 239000012528 membrane Substances 0.000 claims description 11
- 239000010802 sludge Substances 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 2
- 238000010992 reflux Methods 0.000 abstract description 7
- 238000011001 backwashing Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 61
- 230000003301 hydrolyzing effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000003337 fertilizer Substances 0.000 description 4
- 230000020477 pH reduction Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000029087 digestion Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- WHBHBVVOGNECLV-OBQKJFGGSA-N 11-deoxycortisol Chemical compound O=C1CC[C@]2(C)[C@H]3CC[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 WHBHBVVOGNECLV-OBQKJFGGSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 230000000696 methanogenic effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses an integrated reactor for realizing resource denitrification and desulfurization, which comprises a reactor main body, wherein the reactor main body is divided into a biotrickling filter reaction unit positioned at the upper part and an anaerobic zigzag flow type reaction unit positioned at the lower part by a transverse partition plate; the side surface of the anaerobic zigzag flow type reaction unit is provided with a water inlet and a water outlet, and the inside of the anaerobic zigzag flow type reaction unit is divided into a product H with the top communicated through a first guide plate which is vertically arranged along the direction from water inlet to water outlet2S region and CH production4Zone, anaerobic zigzag flow type reaction unit for producing H correspondingly2The side surface of the S area is provided with H near the top2S exhaust pipe for producing CH4The side surface of the zone is provided with CH near the top4An exhaust duct; the top of the biological trickling filtration reaction unit is provided with an air outlet pipe, and the interior of the biological trickling filtration reaction unit sequentially comprises a water inlet spraying layer, a sulfur autotrophic denitrifying bacteria packing layer, a,A back washing system, a gas distribution system and a reflux area, wherein a water outlet and a reflux port communicated with the water inlet spraying layer are arranged on the side surface corresponding to the reflux area, and the gas distribution system and the H are arranged2And S, communicating exhaust pipelines.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to an integrated reactor for realizing resource denitrification and desulfurization.
Background
With the continuous advance of industrialization, particularly the rapid development of the fields of chemical industry, pharmacy, leather making, paper making, fermentation, food processing, mining and the like, a large amount of high-concentration sulfur-containing organic wastewater is generated, and if sulfur-containing compounds in the wastewater are directly discharged into water without treatment, the pH value of the water is reduced, the aquatic animal and plant habitat is changed, so that the survival of the aquatic animal and plant is harmed, and the serious environmental pollution problem is caused.
In addition, under anaerobic conditions, the sulfur-containing compounds are easily converted into H by the action of persulfate reducing bacteria2S, and further, severely corrodes treatment facilities and drainage pipelines. Not only that, when H2S concentration can cause human neurointoxication when accumulated to a certain amount, and is also one of the causes of acid rain.
On the other hand, with the wide use of chemical fertilizers in the agricultural production process, a large amount of nitrogen is lost and enters the water body, so that the nitrogen content in the water body is continuously increased. Research data show that in northern areas of China, due to the fact that nitrate nitrogen fertilizers are applied in large quantities, underground water and drinking water are polluted by nitrate nitrogen in different degrees, nitrate in water bodies can not only cause water eutrophication, but also can be converted into carcinogenic nitrite by microorganisms, and therefore potential harm is caused to human bodies through food chains.
Patent specification CN101050031A discloses a method and a reactor for synchronously removing organic matters, sulfides and nitrates from wastewater. The reactor is a fixed bed biofilm reactor, the filler is volcanic rock or active carbon, a reaction area is formed at the middle lower part of the inner cavity of the cylinder body, a settling area is formed at the upper part of the inner cavity of the cylinder body, a gas collecting area is formed at the middle upper part of the inner cavity of the gas collecting chamber, and a water storage area is formed between the bottom of the inner cavity of the gas collecting chamber and the overflow weir.
There are many methods for treating sulfur-containing organic wastewater and nitrate-containing wastewater separately, but how to treat sulfur-containing organic wastewater and nitrate-containing wastewater simultaneously and it is difficult to recover resources during treatment, so it is very necessary to find a method for treating sulfur-containing organic wastewater and nitrate-containing wastewater together with high efficiency and to realize resource utilization.
Disclosure of Invention
Aiming at the defects in the field and the problem that the sulfur-containing organic wastewater and the nitrate-containing wastewater cannot be subjected to resource treatment, the invention provides the integrated reactor for realizing resource denitrification and desulfurization, which has the advantages of compact occupied area, stable operation and capability of realizing resource recovery and synergistic treatment of the sulfur-containing organic wastewater and the nitrate-containing wastewater.
An integrated reactor for realizing resource denitrification and desulfurization comprises a reactor main body, wherein the reactor main body is divided into a biotrickling filter reaction unit positioned at the upper part and used for treating nitrate-containing wastewater and an anaerobic zigzag flow type reaction unit positioned at the lower part and used for treating sulfur-containing organic wastewater through a transverse partition plate;
the side of the anaerobic zigzag flow type reaction unit is provided with a water inlet and a water outlet, and the inside of the anaerobic zigzag flow type reaction unit is divided into H products with communicated tops through a first guide plate which is vertically arranged along the direction from water inlet to water outlet2S region and CH production4The anaerobic zigzag flow type reaction unit corresponds to the H production zone2The side surface of the S area is provided with H near the top2S exhaust pipe corresponding to the CH product4The side surface of the zone is provided with CH near the top4An exhaust duct;
the bio-trickling filter reaction unit top is equipped with the outlet duct, and inside top-down includes in proper order into water and sprays layer, sulphur autotrophic denitrifying bacteria packing layer, back flush system, gas distribution system and backward flow district, corresponds the side in backward flow district be equipped with the outlet and with the backward flow mouth that layer intercommunication was sprayed in the water inflow, gas distribution system with H2And S, communicating exhaust pipelines.
The integrated reactor of the invention has the following working procedures:
the sulfur-containing organic wastewater enters from a water inlet of the anaerobic zigzag flow type reaction unit and sequentially passes through the process of H production2S region and CH production4Flows out from a water outlet after the zone to realize the two-phase anaerobic of the sulfur-containing organic wastewaterAnd (4) oxygen digestion reaction treatment. Production of H from sulfur-containing organic wastewater2The S region is subjected to hydrolytic acidification, and the sulfur-containing compound is reduced in the hydrolytic acidification stage to generate H2S gas, into H2S exhaust pipe, finally enters the biological trickling filter reaction unit through the gas distribution system, and is used for reducing the nitrate into N2While H is2S is oxidized into elemental S, thereby realizing synchronous denitrification and desulfurization. Producing CH from sulfur-containing organic wastewater after hydrolytic acidification4The zone is subjected to a methanogenesis reaction to produce methane, which enters CH4And (4) collecting after an exhaust pipeline. Thus, H can be realized2S and CH4Respectively recovering and treating.
The nitrate-containing wastewater is uniformly distributed in the biological trickling filtration reaction unit through the water inlet spraying layer and is mixed with H in the packing layer of the sulfur autotrophic denitrifying bacteria2S gas is fully contacted, synchronous denitrification and desulfurization are realized through the action of sulfur autotrophic denitrifying bacteria, and the product is N2And elemental S. N is a radical of2Is discharged through an air outlet pipe. The simple substance S is deposited in the backflow area and is discharged along with the treated nitrate-containing wastewater through the water discharge port.
Preferably, the H production2The S area is divided into n +1 second guide plates with communicated tops by n vertically arranged second guide plates to generate H2S is a compartment, and n is a positive integer;
said product CH4Divide into the CH of producing of m +1 top intercommunication through m vertical second guide plates that set up in the district4Compartments, m is a positive integer. The design can prolong the flowing route of the sewage in the subareas, fully contact with microorganisms to improve the treatment efficiency, and further intercept the sludge in the two subareas.
Preferably, the anaerobic zigzag flow type reaction unit corresponds to each H-producing unit2The side surfaces of the S compartments are provided with H near the top2S exhaust sub-pipes, each of said H2S exhaust sub-pipelines are connected into the H in parallel2S, an exhaust pipeline;
the anaerobic zigzag flow type reaction unit corresponds to each CH-producing unit4The side surfaces of the compartments are provided with CH close to the top4Exhaust sub-pipe, each CH4Exhaust sub-pipe parallel connectionThe CH4An exhaust duct.
Preferably, the anaerobic zigzag flow type reaction unit corresponds to each H-producing unit2S compartment and product CH4The side of the compartment is provided with a sludge discharge port close to the bottom.
Preferably, each of said H-producing2S compartment and product CH4The interior of the compartment is divided into a downward flow area and an upward flow area which are communicated with each other at the bottom through a vertically arranged third guide plate;
the bottom of the third guide plate is bent towards one side of the upward flow area so as to play a better guide role.
Preferably, the anaerobic zigzag flow type reaction unit is cylindrical in internal shape, a vertical partition plate with the same height as the cylindrical height is arranged in the anaerobic zigzag flow type reaction unit, one vertical edge of the vertical partition plate, the first guide plate, the second guide plate and the third guide plate is coincided with the same axis, the other vertical edge is fixedly connected with the cylindrical side face in a sealing mode, and the water inlet and the water outlet are respectively arranged on two sides of the vertical partition plate. The vertical partition plate can play a role in limiting the flow direction of the sulfur-containing organic wastewater in the anaerobic zigzag flow type reaction unit.
The cylindrical reaction unit has the advantages of small occupied area, strong impact load resistance, long sludge retention time, good sludge settling performance, difficult sludge loss, simple structure, strong hydraulic and organic load impact resistance, stable operation, small head loss, difficult blockage and the like.
Preferably, the water outlet is connected with a Z-shaped pipeline, and the height of the middle vertical section of the Z-shaped pipeline is adjustable, so that gas overflow can be prevented, and the hydraulic retention time of the sulfur-containing organic wastewater in the anaerobic zigzag flow type reaction unit can be adjusted to achieve better treatment effect.
Preferably, the water outlet and the return port are both connected with a pipe filter;
the device comprises a tubular filter and is characterized in that a filtering membrane is arranged in the tubular filter, a water inlet pressure sensor and a water outlet pressure sensor are respectively arranged on two sides of the filtering membrane, a water inlet valve is arranged at the water inlet end of the tubular filter, a water outlet valve is arranged at the water outlet end of the tubular filter, and a sulfur discharge valve is arranged at the bottom of the tubular filter.
The working principle of the tubular filter is as follows: the water inlet valve and the water outlet valve of the tubular filter are both in an open state, the nitrate-containing wastewater treated in the backflow zone passes through the tubular filter, elemental sulfur is intercepted by the filtering membrane and blocked in front of the filtering membrane, the pressure monitored by the water inlet pressure sensor is gradually increased, when the pressure difference monitored by the water inlet pressure sensor and the water outlet pressure sensor reaches a preset value, the sulfur discharge valve at the bottom of the tubular filter is opened to discharge the elemental sulfur, the pressure monitored by the water inlet pressure sensor is reduced to be identical to the pressure monitored by the water outlet pressure sensor, and the sulfur discharge valve is closed. Thus achieving the enrichment and recovery of elemental sulfur.
The gas distribution system enables the gas amount distributed on each branch pipeline to be relatively even by adjusting the pipe diameter and the size of the gas hole, the small gas hole is arranged at the position with larger gas pressure, and the large gas hole is arranged at the position with smaller gas pressure, so that the gas is uniformly distributed. Preferably, the gas distribution system comprises:
a horizontally arranged gas distribution main pipeline, one end of which is connected with the H2S, communicating an exhaust pipeline and sealing the other end;
horizontal symmetry set up in the gas distribution lateral conduit of gas distribution trunk line both sides, one end with the gas distribution trunk line intercommunication, the other end is sealed, gas distribution trunk line goes up along the gas distribution lateral conduit pipe diameter crescent of gas flow direction, be equipped with up gas pocket on the gas distribution lateral conduit, gas distribution lateral conduit goes up along keeping away from the gas pocket aperture crescent of gas distribution trunk line direction.
Preferably, a one-way exhaust valve is arranged in the air outlet pipe to prevent external gas from entering the biological trickling filter reaction unit.
Preferably, a pH real-time monitor is arranged on a water inlet pipeline of the water inlet spraying layer and is used for monitoring and ensuring that the pH value of the entering nitrate-containing wastewater is greater than 7, so that the implementation of sulfur autotrophic denitrification is facilitated.
Compared with the prior art, the invention has the main advantages that:
(1) the reactor structure is cylindrical, and the floor area is reduced on the premise of ensuring the effluent quality to reach the standard.
(2) Two-phase anaerobic digestion is realized through an anaerobic zigzag flow type reaction unit, and H is respectively collected in different compartments2S and CH4，H2S enters the biological trickling filtration reaction unit through the gas distribution system, fully contacts with nitrate wastewater, and realizes the treatment of waste by waste through sulfur autotrophic denitrification and sulfur removal.
(3) Through setting up tubular filter and being used for the recovery of sulphur simple substance, realize the resourceization, so this integral type reactor provides a low cost, little volume and can the waste water treatment scheme of recovered energy.
Drawings
FIG. 1 is a schematic structural view of an integrated reactor of an embodiment;
FIG. 2 is a schematic top view of an anaerobic zigzag flow type reaction unit of the integrated reactor according to an embodiment;
FIG. 3 is a schematic view showing an expanded structure of an anaerobic zigzag flow type reaction unit of the integrated reactor according to the embodiment;
FIG. 4 is a schematic structural view of a tube filter of the integrated reactor of the embodiment;
FIG. 5 is a schematic top view of a gas distribution system of the integrated reactor according to an embodiment;
in the figure: 1-water inlet, 2, 4, 6, 8-third guide plate, 3, 7-second guide plate, 5-first guide plate, 9-vertical partition plate, 10, 11, 12, 13-sludge discharge port, 14-Z type water outlet pipeline, 15, 16-H2S exhaust sub-pipe, 17-H2S exhaust pipe, 18, 19-CH4Exhaust subduct, 20-CH4The system comprises an exhaust pipeline, 21, 22, 23-water pumps, 24-a reflux zone, 25-an air distribution system, 26-a backwashing pipe, 27-a packing layer, 28-a water inlet spraying layer, 29-a one-way exhaust valves, 30-a tubular filter, 31-a rotor flow meter, 32-a pH real-time monitor, 33-a water inlet pressure sensor, 34-a water inlet valve, 35-a water outlet valve, 36 and 40-an air pump, 37-an air distribution main pipeline, 38-an air distribution branch pipeline, 39-air holes, 41-an water outlet pressure sensor, 42-a sulfur discharge valve, 43-a filter membrane, A, B-H production2S Compartment, C, D-production of CH4A compartment.
Detailed Description
The invention is further described with reference to the following drawings and specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The following examples are conducted under conditions not specified, usually according to conventional conditions, or according to conditions recommended by the manufacturer.
The integrated reactor for realizing resource denitrification and desulfurization can be used for simultaneously treating sulfur-containing organic wastewater and nitrate-containing wastewater, and has a structure shown in figure 1, and the integrated reactor comprises a reactor main body which is divided into a biotrickling filter reaction unit positioned at the upper part for treating the nitrate-containing wastewater and an anaerobic zigzag flow reaction unit positioned at the lower part for treating the sulfur-containing organic wastewater through a transverse partition plate. The transverse partition board completely separates the respective waste water in the biological trickling filtration reaction unit and the anaerobic zigzag flow reaction unit. The volume ratio of the biotrickling filter reaction unit to the anaerobic zigzag flow reaction unit is 1: 1.
The top view structure of the anaerobic zigzag flow type reaction unit is shown in figure 2, and the unfolding structure is shown in figure 3. The shape of the inner cavity of the anaerobic zigzag flow type reaction unit is cylindrical, a vertical partition plate 9 with the same height as the cylindrical height is arranged in the anaerobic zigzag flow type reaction unit along the radial direction, the bottom edge and the top edge of the vertical partition plate 9 are respectively fixed with the cylindrical bottom surface and the cylindrical top surface in a sealing way, one vertical edge of the vertical partition plate 9 is coincided with the cylindrical central axis, and the other vertical edge is fixedly connected with the cylindrical side surface in a sealing way. The vertical partition plate 9 is used for limiting the flow direction of the sulfur-containing organic wastewater in the anaerobic zigzag flow type reaction unit.
The interior of the cylindrical cavity is also provided with a vertical first guide plate 5, and the first guide plate 5 and the vertical partition plate 9 are positioned on the same longitudinal section. A gap is reserved between the top edge of the first guide plate 5 and the cylindrical top surface, the bottom edge of the first guide plate is fixedly sealed with the cylindrical bottom surface, one vertical edge of the first guide plate is fixedly sealed with the vertical partition plate 9, and the other vertical edge of the first guide plate is fixedly sealed with the cylindrical side surface. The first guide plate 5 and the vertical baffle plate 9 divide the cylindrical cavity into two semicylindrical H-shaped products with communicated tops2S region and CH production4And (4) a zone.
The cylindrical cavity is also internally provided with a guide plate which is positioned on the same longitudinal section and is vertical to the first guide plate 5Two second baffles 3, 7. One vertical edge of the second guide plate 3 and 7 is fixedly connected with the vertical partition plate 9 and the first guide plate 5 in a sealing way, the other vertical edge is fixedly connected with the cylindrical side face in a sealing way, the height of the vertical edge is the same as that of the first guide plate 5, and the bottom edge of the vertical edge is connected with the cylindrical bottom face in a sealing way. The second guide plate 3 will produce H2The S area is divided into two identical H products with 90-degree sector cross sections2S compartment A, B. The second guide plate 7 will produce CH4The zone is divided into two identical CH-producing zones with 90-degree sector cross section4A compartment C, D.
Produce H2A vertical third guide plate 2 is arranged in the S compartment A, the top edge of the third guide plate 2 is fixedly connected with the cylindrical top surface in a sealing way, one vertical edge is fixedly connected with the vertical partition plate 9, the first guide plate 5 and the second guide plates 3 and 7 in a sealing way, the other vertical edge is fixedly connected with the cylindrical side surface in a sealing way, and a gap is reserved between the bottom edge and the cylindrical bottom surface. The third guide plate 2 will produce H2The S compartment A is divided into a downward flow area and an upward flow area with communicated bottoms and a volume ratio of 1: 3. The downward flow area is enclosed by the third guide plate 2 and the vertical partition plate 9, and the upward flow area is enclosed by the third guide plate 2 and the second guide plate 3. The bottom of the third guide plate 2 is bent towards one side of the upward flow area and forms an angle of 45 degrees with the horizontal direction, so that a better flow guiding effect is achieved. The bottom edge of the third guide plate 2 and the product H2The bisectors of the sector apex angles of the cross sections of the S compartments A coincide. Cylindrical cavity corresponding to H2The side surface of the downward flow area of the S compartment A is provided with a water inlet 1, and the ratio of the distance from the water inlet 1 to the top surface of the cylindrical cavity to the height of the cylindrical cavity is 1: 8. Cylindrical cavity corresponding to H2The side surface of the upward flow area of the S compartment A is provided with H2 S exhaust sub-pipe 15, H2The ratio of the distance from the S exhaust sub-pipeline 15 to the top surface of the cylindrical cavity to the height of the cylindrical cavity is 1: 10.
And H yield2S Compartment A is designed identically, yielding H2S compartment B and product CH4The same third guide plates 4, 6 and 8 are respectively arranged in the same positions in the compartment C, D, and the cylindrical cavity correspondingly produces the H2S compartment B and product CH4H is respectively arranged at the same position on the side surface of the upward flow area of the compartment C, D2 S exhaust sub-duct 16 and CH4Exhaust subducts 18, 19. The third guide plates 2 and 4 are positioned on the same longitudinal section, and the third guide plates 6 and 8 are positioned on the same longitudinal section and are vertical to the longitudinal section where the third guide plates 2 and 4 are positioned. H2 S exhaust sub-pipelines 15 and 16 are connected in parallel to H2 S exhaust line 17, H2The S exhaust duct 17 is connected to the air distribution system 25 by an air pump 36. CH (CH)4The exhaust sub-pipelines 18 and 19 are connected in parallel to CH provided with an air pump 404 An exhaust duct 20.
Cylindrical cavity corresponding to CH4The side surface of the upward flow area of the compartment D is provided with a Z-shaped water outlet pipeline 14, and the ratio of the distance from the water inlet end of the Z-shaped water outlet pipeline 14 to the bottom surface of the cylindrical cavity to the height of the cylindrical cavity is 1: 5. The height of the middle vertical section of the Z-shaped water outlet pipeline 14 is adjustable, so that on one hand, gas overflow can be prevented, and on the other hand, the hydraulic retention time of the sulfur-containing organic wastewater in the anaerobic zigzag flow type reaction unit can be adjusted so as to achieve better treatment effect.
Cylindrical cavity corresponding to H2S Compartment A, B and produce CH4The side central axis of the compartment C, D is respectively provided with a sludge discharge port 10-13, and the ratio of the distance between the sludge discharge port 10-13 and the bottom surface of the cylindrical cavity to the height of the cylindrical cavity is 1: 20.
The top of the biotrickling filter reaction unit is provided with an air outlet pipe, and a one-way exhaust valve 29 is arranged in the air outlet pipe, so that external gas is prevented from entering the biotrickling filter reaction unit.
The interior of the bio-trickling filter reaction unit sequentially comprises a water inlet spraying layer 28, a packing layer 27, a back flushing system, a gas distribution system 25 and a reflux area 24 from top to bottom, wherein the volume ratio of the water inlet spraying layer to the packing layer is 1:4:1:1: 3. The side of the biotrickling filter reaction unit corresponding to the return area 24 is provided with a water outlet and a return port.
The water inlet spraying layer 28 is used for feeding water through the water pump 22, a backflow branch is further arranged on the water inlet pipeline, the backflow branch is provided with the water pump 21, and the backflow branch is communicated with the backflow port. A pH real-time monitor 32 is arranged on a water inlet pipeline trunk of the water inlet spraying layer 28 close to the spraying port, so that the pH of the sprayed nitrate-containing wastewater is ensured to be more than 7 by adjusting the reflux ratio, and the implementation of the sulfur autotrophic denitrification is facilitated.
The packing layer 27 is filled with volcanic rock packing with the grain diameter of 10mm, and sulfur autotrophic denitrifying bacteria are enriched on the volcanic rock packing.
The backwash system includes a backwash pipe 26, and a water pump 23 and a rotameter 31 provided on the backwash pipe 26.
As shown in fig. 5, the gas distribution system 25 includes:
a horizontally arranged gas distribution main pipe 37, one end of which is connected with H2The S exhaust pipeline 17 is communicated, and the other end is closed;
the 6 gas distribution branch pipelines 38 are horizontally and symmetrically arranged at two sides of the gas distribution main pipeline 37, one end of each gas distribution branch pipeline is communicated with the gas distribution main pipeline 37, and the other end of each gas distribution branch pipeline is closed.
The diameter of the gas distribution branch pipe 38 on the gas distribution main pipe 37 along the gas flowing direction is gradually increased, an upward air hole 39 is arranged on the gas distribution branch pipe 38, and the aperture of the air hole 39 on the gas distribution branch pipe 38 along the direction far away from the gas distribution main pipe 37 is gradually increased. The gas distribution system 25 makes the gas amount distributed on each gas distribution branch pipe 38 relatively even by adjusting the pipe diameter and the size of the gas hole 39, and realizes the uniform distribution of gas by arranging a small gas hole at the position with larger gas pressure and an large gas hole at the position with smaller gas pressure.
The drain and return ports are both connected to the tubular filter 30.
As shown in fig. 4, a filtering membrane 43 for intercepting elemental sulfur is disposed in the tubular filter 30, and a water inlet pressure sensor 33 and a water outlet pressure sensor 41 are disposed on both sides of the filtering membrane 43. The water inlet end of the tubular filter 30 is provided with a water inlet valve 34, and the water outlet end is provided with a water outlet valve 35. The inlet valve 34 and outlet valve 35 may be switched for cleaning while the system is running. The lower central portion of the chamber of the candle filter 30 is provided with a sulfur discharge valve 42.
The work flow of the integrated reactor of this example is as follows:
the sulfur-containing organic wastewater enters from a water inlet 1 of an anaerobic curved baffled reaction unit and is subjected to curved baffled type H production in sequence under the flow guide effect of a first flow guide plate 5, second flow guide plates 3 and 7 and third flow guide plates 2, 4, 6 and 82S Compartment A, B and produce CH4The compartment C, D flows out from the Z-shaped water outlet pipeline 14 to realize the two-phase anaerobic digestion reaction treatment of the sulfur-containing organic wastewater. Production of H from sulfur-containing organic wastewater2S-shaped partitionRoom A, B is subjected to hydrolytic acidification, and sulfur-containing compounds are reduced in the hydrolytic acidification stage to produce H2S gas, respectively passing through H2S exhaust sub-pipes 15, 16 enter H2 S exhaust pipe 17, finally enters the bio-trickling filter reaction unit through gas distribution system 25 for reducing nitrate into N2While H is2S is oxidized into elemental S, thereby realizing synchronous denitrification and desulfurization. Producing CH from sulfur-containing organic wastewater after hydrolytic acidification4Compartment C, D is subjected to a methanogenic reaction, the methane produced being passed over CH4The exhaust sub-ducts 18, 19 enter the CH4And the exhaust line 20. Thus, H can be realized2S and CH4Respectively recovering and treating. Produce H2S Compartment A, B and produce CH4The sludge in the compartment C, D can be discharged through the sludge discharge ports 10-11.
The nitrate-containing wastewater is uniformly distributed in the biological trickling filter reaction unit through the water inlet spraying layer 28 and passes through the packing layer 27 to react with H2S gas is fully contacted, synchronous denitrification and desulfurization are realized through the action of sulfur autotrophic denitrifying bacteria rich on volcanic rocks in the packing layer 27, and the product is N2And elemental S. N is a radical of2Is discharged through an air outlet pipe. The simple substance S is deposited in the backflow area and is discharged along with the treated nitrate-containing wastewater through the water discharge port.
Due to the existence of the tubular filter 30, when the nitrate-containing wastewater treated in the reflux zone passes through the tubular filter 30, elemental sulfur is intercepted by the filtering membrane 43 and is blocked in front of the filtering membrane 43, the pressure monitored by the water inlet pressure sensor 33 is gradually increased, when the pressure difference monitored by the water inlet pressure sensor 33 and the water outlet pressure sensor 41 reaches a preset value, the sulfur discharge valve 42 at the bottom of the tubular filter 30 is opened, the elemental sulfur is discharged, the pressure monitored by the water inlet pressure sensor 33 is reduced, the pressure is recovered to be the same as the pressure monitored by the water outlet pressure sensor 41, and the sulfur discharge valve 42 is closed. Thus achieving the enrichment and recovery of elemental sulfur.
The integrated reactor is applied to the cooperative treatment of the fertilizer production wastewater and the chemical plant wastewater, and after the treatment, the concentration of nitrate nitrogen in the fertilizer plant wastewater is reduced from 2000-2500 mg/L to 100-130 mg/L; the concentration of sulfate radicals in the wastewater of the paper mill is reduced from 14800mg/L to 200mg/L, and the recovery of 85% of sulfur simple substances is realized, wherein the COD concentration is reduced from 10010mg/L to 400mg/L, and the treatment effect is good.
Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the above description of the present invention, and equivalents also fall within the scope of the invention as defined by the appended claims.
Claims (10)
1. An integrated reactor for realizing resource denitrification and desulfurization comprises a reactor main body and is characterized in that the reactor main body is divided into a biotrickling filter reaction unit positioned at the upper part and used for treating nitrate-containing wastewater and an anaerobic zigzag flow type reaction unit positioned at the lower part and used for treating sulfur-containing organic wastewater through a transverse partition plate;
the side of the anaerobic zigzag flow type reaction unit is provided with a water inlet and a water outlet, and the inside of the anaerobic zigzag flow type reaction unit is divided into H products with communicated tops through a first guide plate which is vertically arranged along the direction from water inlet to water outlet2S region and CH production4The anaerobic zigzag flow type reaction unit corresponds to the H production zone2The side surface of the S area is provided with H near the top2S exhaust pipe corresponding to the CH product4The side surface of the zone is provided with CH near the top4An exhaust duct;
the bio-trickling filter reaction unit top is equipped with the outlet duct, and inside top-down includes in proper order into water and sprays layer, sulphur autotrophic denitrifying bacteria packing layer, back flush system, gas distribution system and backward flow district, corresponds the side in backward flow district be equipped with the outlet and with the backward flow mouth that layer intercommunication was sprayed in the water inflow, gas distribution system with H2And S, communicating exhaust pipelines.
2. The integrated reactor for realizing resource denitrification and desulfurization as claimed in claim 1, wherein the H production is performed2The S area is divided into n +1 second guide plates with communicated tops by n vertically arranged second guide plates to generate H2S is a compartment, and n is a positive integer;
said product CH4Second guide plate vertically arranged through m blocks in zoneDivide into m +1 top connected produce CH4Compartments, m is a positive integer.
3. The integrated reactor for realizing resource denitrification and desulfurization as claimed in claim 2, wherein the anaerobic zigzag flow type reaction unit corresponds to each H-production unit2The side surfaces of the S compartments are provided with H near the top2S exhaust sub-pipes, each of said H2S exhaust sub-pipelines are connected into the H in parallel2S, an exhaust pipeline;
the anaerobic zigzag flow type reaction unit corresponds to each CH-producing unit4The side surfaces of the compartments are provided with CH close to the top4Exhaust sub-pipe, each CH4The exhaust sub-pipeline is connected into the CH in parallel4An exhaust duct.
4. The integrated reactor for realizing resource denitrification and desulfurization as claimed in claim 2, wherein the anaerobic zigzag flow type reaction unit corresponds to each H-production unit2S compartment and product CH4The side of the compartment is provided with a sludge discharge port close to the bottom.
5. The integrated reactor for resource denitrification and desulfurization as claimed in claim 2, wherein each H-producing reactor produces H2S compartment and product CH4The interior of the compartment is divided into a downward flow area and an upward flow area which are communicated with each other at the bottom through a vertically arranged third guide plate;
the bottom of the third guide plate bends towards one side of the upward flow area.
6. The integrated reactor for realizing resource denitrification and desulfurization as recited in claim 5, wherein the anaerobic zigzag flow type reaction unit is cylindrical in internal shape, a vertical partition plate with the same height as the cylindrical shape is arranged in the anaerobic zigzag flow type reaction unit, one vertical edge of the vertical partition plate, the first guide plate, the second guide plate and the third guide plate is coincided with the same axis, the other vertical edge is fixedly connected with the cylindrical side surface in a sealing manner, and the water inlet and the water outlet are respectively arranged on two sides of the vertical partition plate.
7. The integrated reactor for realizing resource denitrification and desulfurization as claimed in claim 1, wherein the water outlet is connected with a Z-shaped pipeline, and the middle vertical section of the Z-shaped pipeline is adjustable in height.
8. The integrated reactor for realizing resource denitrification and desulfurization as claimed in claim 1, wherein the water outlet and the return port are both connected with a tubular filter;
the device comprises a tubular filter and is characterized in that a filtering membrane is arranged in the tubular filter, a water inlet pressure sensor and a water outlet pressure sensor are respectively arranged on two sides of the filtering membrane, a water inlet valve is arranged at the water inlet end of the tubular filter, a water outlet valve is arranged at the water outlet end of the tubular filter, and a sulfur discharge valve is arranged at the bottom of the tubular filter.
9. The integrated reactor for realizing resource denitrification and desulfurization as claimed in claim 1, wherein the gas distribution system comprises:
a horizontally arranged gas distribution main pipeline, one end of which is connected with the H2S, communicating an exhaust pipeline and sealing the other end;
horizontal symmetry set up in the gas distribution lateral conduit of gas distribution trunk line both sides, one end with the gas distribution trunk line intercommunication, the other end is sealed, gas distribution trunk line goes up along the gas distribution lateral conduit pipe diameter crescent of gas flow direction, be equipped with up gas pocket on the gas distribution lateral conduit, gas distribution lateral conduit goes up along keeping away from the gas pocket aperture crescent of gas distribution trunk line direction.
10. The integrated reactor for realizing resource denitrification and desulfurization as claimed in claim 1, wherein a one-way exhaust valve is arranged in the gas outlet pipe;
and a pH real-time monitor is arranged on a water inlet pipeline of the water inlet spraying layer.
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