CN115677027B - Comprehensive treatment system and method for high-concentration sulfate organic wastewater and process waste gas - Google Patents
Comprehensive treatment system and method for high-concentration sulfate organic wastewater and process waste gas Download PDFInfo
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- CN115677027B CN115677027B CN202211435989.XA CN202211435989A CN115677027B CN 115677027 B CN115677027 B CN 115677027B CN 202211435989 A CN202211435989 A CN 202211435989A CN 115677027 B CN115677027 B CN 115677027B
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Abstract
The invention discloses a comprehensive treatment system and a method for high-concentration sulfate organic wastewater and process waste gas, wherein the comprehensive treatment system for the high-concentration sulfate organic wastewater and the process waste gas comprises the following components: the device comprises a primary acid production, sulfate reduction phase anaerobic reactor, an intermediate steady flow tank, an aerobic oxidation tank, a sedimentation tank and a secondary methane production phase anaerobic reactor which are connected in sequence; the anaerobic up-flow sludge bed reactor is internally provided with a sludge zone, a reaction zone and a three-phase separation zone from bottom to top respectively, hydrogen sulfide-containing waste gas generated by the first-stage acid-generating and sulfate-reducing anaerobic reactor is sent into the aerobic oxidation pond through a first waste gas pipeline, and methane generated by the second-stage methane-generating anaerobic reactor is sent into the first-stage acid-generating and sulfate-reducing anaerobic reactor through a second waste gas pipeline for stripping.
Description
Technical Field
The invention relates to the technical field of industrial wastewater treatment, in particular to a system and a method for comprehensively treating high-concentration sulfate organic wastewater and process waste gas.
Background
Sulfate is widely used as an important raw material in industrial production, and some fermentation, alkali production and light industry generally produce high-concentration sulfate-rich organic wastewater in the production process. The sulfate in the water body is relatively stable, but the high sulfate wastewater is reduced to sulfide and hydrogen sulfide gas in the treatment process. The reductive sulfide is easy to react with element ions in the water body to form sediment, so that metal elements in the water body are lost, the growth and propagation of microorganisms are influenced, and the water area environment is influenced. Meanwhile, hydrogen sulfide has strong corrosiveness, so that the problems of water acidification, pipeline corrosion and the like are caused.
Aiming at high-concentration sulfate organic wastewater, the anaerobic biological treatment process is most commonly adopted at present. However, the conventional single-phase anaerobic treatment process realizes the acidogenesis methanogenesis fermentation process in the same reactor, and the reactor has the problems of low organic load, low methanogenesis rate and the like although the reactor has a simple structure and is convenient to manage. The technology of the single-phase reactor is improved, and patent CN 213707869U proposes a novel anaerobic reactor for treating high-concentration sulfate organic wastewater, wherein three layers of push-pull packing plates are arranged in the single-phase anaerobic reactor, and the iron powder/graphene oxide mixed packing on the packing plates is used for adsorbing hydrogen sulfide in the reactor. The method can reduce the adverse effect of hydrogen sulfide on the flora in the reactor, but the filler is easy to lose efficacy and needs to be replaced in time, so that secondary pollution of solid waste is generated.
Because the anaerobic digestion process of sulfate wastewater is cooperated by microbial communities such as hydrolysis, acidification, methane production, sulfate reduction and the like, a competition mechanism exists between sulfate reducing bacteria and methanogens in a single-phase anaerobic system, the two microorganisms have different proper environmental conditions, and because the methanogens are sensitive to the external environmental conditions, hydrogen sulfide toxic gas generated in the sulfate reduction process has a serious inhibition effect on the methane production process, so that the single-phase anaerobic treatment system is difficult to stably operate, and the two-stage split-phase anaerobic technology gradually gets more attention. Patent CN 109231443 proposes an industrial wastewater anaerobic desulfurization device and process based on magnetite reinforcement, wherein magnetite-treated powder is added into a primary acid phase anaerobic reactor, the generated gas is absorbed by sodium hydroxide solution, and primary effluent is subjected to secondary anaerobic methane production. The method adopts a two-phase separation anaerobic process, reduces the inhibition of hydrogen sulfide on methanogens, but the added magnetite powder exists in the sludge, is easy to deposit, and has low reaction efficiency. At the same time, the hydrogen sulfide gas separated from the reactor needs to be absorbed by sodium hydroxide, and the absorption liquid still needs to be further treated.
The system and the method for comprehensively treating the high-concentration sulfate organic wastewater and the process waste gas can enable Sulfate Reducing Bacteria (SRB) and Methanogens (MPB) to respectively become dominant bacterial groups in a primary anaerobic system and a secondary anaerobic system, and improve the sulfate and organic matter removal efficiency and the stability of the system. Meanwhile, the toxicity reduction of the wastewater and the waste gas is improved through stripping and aerobic oxidation, and the recycling of elemental sulfur is realized.
Disclosure of Invention
In order to achieve the above purpose, the invention discloses a comprehensive treatment system for high-concentration sulfate organic wastewater and process exhaust gas, comprising:
the device comprises a primary acid production, sulfate reduction phase anaerobic reactor, an intermediate steady flow tank, an aerobic oxidation tank, a sedimentation tank and a secondary methane production phase anaerobic reactor which are connected in sequence;
the anaerobic up-flow sludge bed reactor is internally provided with a sludge zone, a reaction zone and a three-phase separation zone from bottom to top respectively, hydrogen sulfide-containing waste gas generated by the first-stage acid-generating and sulfate-reducing anaerobic reactor is sent into the aerobic oxidation pond through a first waste gas pipeline, and methane generated by the second-stage methane-generating anaerobic reactor is sent into the first-stage acid-generating and sulfate-reducing anaerobic reactor through a second waste gas pipeline for stripping.
Preferably, the primary acid-producing, sulfate reducing phase anaerobic reactor and the secondary methane-producing phase anaerobic reactor are of double-layer jacket structures, the outer layers of the primary acid-producing, sulfate reducing phase anaerobic reactor and the secondary methane-producing phase anaerobic reactor are constant-temperature heat preservation layers, the internal temperature of the primary acid-producing, sulfate reducing phase anaerobic reactor is controlled to be 30-35 ℃, the pH is controlled to be 6.0-7.0, the hydraulic retention time is controlled to be 6-12h, the internal temperature of the secondary methane-producing phase anaerobic reactor is controlled to be 33-37 ℃, the pH is controlled to be 7.5-8.5, and the hydraulic retention time is controlled to be 12-24h.
Preferably, flocculent anaerobic sludge is inoculated in the primary acid production, sulfate reduction phase anaerobic reactor and the secondary methane production phase anaerobic reactor, and the sludge concentration is 10-20g/L.
Preferably, the hydrophobic biological filler is added into the aerobic oxidation tank, and the filler addition ratio is 30-40%.
Preferably, the aerobic oxidation tank is inoculated with aerobic flocculent sludge, the sludge concentration is 4g-6g/L, an aeration disc is arranged at the bottom of the aerobic oxidation tank, the dissolved oxygen concentration in the tank is 1-1.5mg/L, the temperature in the aerobic oxidation tank is 20-32 ℃, and the pH is 7-8.
Preferably, the bottom of the sedimentation tank is connected with the aerobic oxidation tank through a pipeline with a pump, and the surface load of the sedimentation tank is 1.0-1.8m 3 /(m 2 *h)。
Preferably, a sludge stirring unit is installed at the bottom of the sedimentation tank, and the sludge stirring unit comprises:
the bottom mounting shell is fixedly connected to the bottom of the sedimentation tank;
the top mounting shell is connected to the bottom mounting shell in a lifting manner;
a sludge stopping table mounted on the top end of the top mounting shell;
the mounting cross plate is fixedly connected in the top mounting shell;
the lifting assembly is arranged in the bottom mounting shell and is connected with the mounting transverse plate;
the stirring blades are oppositely arranged at the side end of the top mounting shell;
and the two action components are symmetrically arranged in the bottom installation shell and the top installation shell, are connected with the stirring blades in a one-to-one correspondence manner, and drive the action components to act.
Preferably, the lifting assembly includes:
the vertical cylinder is fixedly arranged at the bottom end of the mounting transverse plate;
the limiting ring is arranged at the end, far away from the mounting transverse plate, of the vertical cylinder;
the guide column is vertically arranged at the bottom in the bottom mounting shell, and the vertical cylinder is sleeved on the guide column;
the return spring is sleeved on the guide post and is propped against between the bottom in the bottom mounting shell and the limiting ring;
the two transmission rods are symmetrically hinged to the vertical cylinder, and the transmission rods are connected with the action assembly far away from the end of the vertical cylinder.
Preferably, the action assembly includes:
the first rotating shaft is rotatably arranged at the bottom in the bottom mounting shell;
the transverse moving rod is fixedly connected to the inner bottom of the bottom mounting shell through a supporting frame;
the transverse moving sleeve is sleeved on the transverse moving rod, and the transmission rod is hinged with the transverse moving sleeve far away from the vertical cylinder end;
the transmission rack is arranged on the transverse moving sleeve;
the first gear and the second gear are coaxially arranged on the first rotating shaft, and the first gear is meshed with the transmission rack;
the action box is arranged on the installation transverse plate through a supporting rod, a pair of bevel gears are meshed in the action box, the stirring blade is arranged on a rotating shaft III, the rotating shaft III is rotatably arranged on the top installation shell, and the rotating shaft III extends into the action box and is connected with one of the bevel gears;
the long gear is arranged on the mounting transverse plate through a second rotating shaft, the long gear is meshed with the second gear, and the second rotating shaft stretches into the action box and is connected with the other bevel gear.
The invention also discloses a comprehensive treatment method of the high-concentration sulfate organic wastewater and the process waste gas, which is used for the comprehensive treatment system of the high-concentration sulfate organic wastewater and the process waste gas, and comprises the following steps:
step 1, a water inlet pump of a first-stage acid-producing and sulfate-reducing phase anaerobic reactor is turned on, and wastewater containing high-concentration sulfate is sent into the first-stage acid-producing and sulfate-reducing phase anaerobic reactor from a water inlet tank through a water inlet pipeline and a water distributor;
step 2, opening a water outlet valve of the first-stage acid-producing and sulfate-reducing phase anaerobic reactor, and enabling the water to flow automatically to an intermediate steady flow tank, wherein hydrogen sulfide-containing waste gas generated by the first-stage acid-producing and sulfate-reducing phase anaerobic reactor is sent into an aerobic oxidation tank through a waste gas pipeline I;
step 3, opening a water inlet pump of the aerobic oxidation tank, lifting the wastewater from the middle steady flow tank into the aerobic oxidation tank through a pipeline and a pump, opening a water outlet valve of the aerobic oxidation tank, and automatically flowing the muddy water mixed solution into a sedimentation tank;
step 4, opening a water outlet valve of the sedimentation tank and a water inlet pump of the secondary methanogenic phase anaerobic reactor, and sending supernatant into the secondary methanogenic phase anaerobic reactor through a water inlet pipeline and a water distributor, and sending bottom sludge into the aerobic oxidation tank 3 through a sludge reflux pump;
and 5, opening a water outlet valve of the second-stage methanogenic phase anaerobic reactor, enabling water to flow out, and discharging biogas of the second-stage methanogenic phase anaerobic reactor into the first-stage acidogenic and sulfate reduction phase anaerobic reactor through a second exhaust pipeline to blow off.
The invention has the following advantages:
firstly, the separation of the acid producing phase, the sulfate reducing phase and the methane producing phase in the anaerobic digestion process is realized through the two-stage anaerobic reactor, so that the inhibitory damage of high-concentration sulfate and sulfide in the wastewater to the functions of the methane producing microbial system is effectively avoided, and the stability of the anaerobic system is further improved.
And secondly, biogas generated in the second-stage methanogenic phase anaerobic reactor is used as a blowing inert gas source of the first-stage acidogenic and sulfate reduction phase anaerobic reactor, so that energy is saved, most sulfides in the first-stage acidogenic and sulfate reduction phase anaerobic reactor can be converted into H2S to overflow and release through gas blowing, and the biotoxicity of an anaerobic reaction system is reduced.
Thirdly, the invention adopts an aerobic oxidation process to carry out biological oxidation treatment on the hydrogen sulfide-containing waste gas and sulfide-containing waste water generated by the anaerobic system, thus realizing synchronous removal of sulfur-containing toxic substances in the waste water and the waste gas, and simultaneously realizing recycling of elemental sulfur by controlling process conditions.
Fourth, the invention adopts biochemical method to treat high sulfate waste water and waste gas produced in the process, has low operation cost and strong impact resistance, and can effectively ensure that the effluent can reach the emission standard required by industry. The enterprise cost is reduced, the environmental protection requirement is met, good economic benefit is generated, and the sustainable development requirement is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a graph showing the effect of treating high sulfate organic wastewater produced during fermentation of a biological organism;
FIG. 3 is a graph II showing the effect of treating high sulfate organic wastewater produced during fermentation of a biological organism;
FIG. 4 is a diagram of aerobic recovery of elemental sulfur from high sulfate organic wastewater produced during a biological fermentation process in accordance with the present invention;
FIG. 5 is a schematic view showing the structure of a sludge stirring unit according to the present invention.
In the figure: 1. a first-stage acid-producing and sulfate-reducing phase anaerobic reactor; 2. an intermediate steady flow tank; 3. an aerobic oxidation tank; 4. a sedimentation tank; 5. a second-stage methanogenic phase anaerobic reactor; 11. a bottom mounting shell; 12. a top mounting shell; 13. a sludge stopping table; 14. mounting a transverse plate; 15. a lifting assembly; 16. an agitating blade; 17. an action assembly; 18. a vertical tube; 19. a limiting ring; 10. a guide post; 21. a return spring; 22. a first rotating shaft; 23. a traversing lever; 24. traversing the sleeve; 25. a transmission rod; 26. a drive rack; 27. a first gear; 28. a second gear; 29. an action box; 20. a long gear.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 5, the integrated treatment system for high-concentration sulfate organic wastewater and process exhaust gas provided in this embodiment includes:
the device comprises a primary acid production, sulfate reduction phase anaerobic reactor 1, an intermediate steady flow tank 2, an aerobic oxidation tank 3, a sedimentation tank 4 and a secondary methane production phase anaerobic reactor 5 which are connected in sequence;
the first-stage acid-producing and sulfate-reducing phase anaerobic reactor 1 and the second-stage methane-producing phase anaerobic reactor 5 are anaerobic up-flow sludge bed reactors, sludge areas, reaction areas and three-phase separation areas are respectively arranged in the anaerobic up-flow sludge bed reactors from bottom to top, hydrogen sulfide-containing waste gas generated by the first-stage acid-producing and sulfate-reducing phase anaerobic reactor 1 is sent into the aerobic oxidation tank 3 through a waste gas pipeline I, and methane generated by the second-stage methane-producing phase anaerobic reactor 5 is sent into the first-stage acid-producing and sulfate-reducing phase anaerobic reactor 1 through a waste gas pipeline II for stripping.
In one embodiment, the primary acid-producing, sulfate-reducing phase anaerobic reactor 1 and the secondary methane-producing phase anaerobic reactor 5 are of double-layer jacket structures, the outer layers of the primary acid-producing, sulfate-reducing phase anaerobic reactor 1 and the secondary methane-producing phase anaerobic reactor 5 are constant temperature insulation layers, the internal temperature of the primary acid-producing, sulfate-reducing phase anaerobic reactor 1 is controlled to be 30-35 ℃, the pH is controlled to be 6.0-7.0, the hydraulic retention time is controlled to be 6-12h, the internal temperature of the secondary methane-producing phase anaerobic reactor 5 is controlled to be 33-37 ℃, the pH is controlled to be 7.5-8.5, and the hydraulic retention time is controlled to be 12-24h.
In one embodiment, flocculent anaerobic sludge is inoculated in the primary acid-producing, sulfate-reducing phase anaerobic reactor 1 and the secondary methanogenic phase anaerobic reactor 5, and the sludge concentration is 10-20g/L.
In one embodiment, the hydrophobic biological filler is added into the aerobic oxidation tank 3, and the filler addition ratio is 30-40%.
In one embodiment, the aerobic oxidation tank 3 is inoculated with aerobic flocculent sludge, the concentration of the sludge is 4g-6g/L, an aeration disc is arranged at the bottom of the aerobic oxidation tank 3, the concentration of dissolved oxygen in the tank is 1-1.5mg/L, the temperature in the aerobic oxidation tank 3 is 20-32 ℃, and the pH is 7-8.
In one embodiment of the present invention, in one embodiment,the bottom of the sedimentation tank 4 is connected with the aerobic oxidation tank 3 through a pipeline with a pump, and the surface load of the sedimentation tank 4 is 1.0-1.8m 3 /(m 2 *h)。
The working principle and the beneficial effects of the invention are as follows:
the high sulfate organic wastewater generated in the biological fermentation process of a certain biological material limited company is treated, the water quality condition of the enterprise wastewater is shown in table 1, the COD concentration of the wastewater is about 10000mg/L, and the sulfate concentration is between 4700 and 4900 mg/L.
TABLE 1 biological fermentation sulfate organic wastewater Water quality testing list (Unit: mg/L)
| Index (I) | pH | COD | NH -N | SO 4 2- | TN | TP | Salt content |
| Water sample 1 | 3.67 | 10565 | 36.17 | 4740 | 55.51 | 43.54 | 10755 |
| Water sample 2 | 3.69 | 10019 | 34.50 | 4885 | 55.31 | 44.34 | 11250 |
The high sulfate organic wastewater treatment method adopted in the embodiment comprises the following steps:
the first-stage acid production and sulfate reduction phase anaerobic reactor 1 is inoculated with domesticated flocculent anaerobic sludge, and the sludge concentration is about 10000mg/L. The HRT (hydraulic retention time) of the first-stage acidogenesis and sulfate reduction phase anaerobic reactor 1 is 12h, the first-stage anaerobic system takes acidogenesis bacteria and Sulfate Reduction Bacteria (SRB) as main materials, and sulfate in the wastewater is reduced into sulfide, elemental sulfur or hydrogen sulfide gas through the biological reduction reaction of the SRB bacteria. The effluent of the first-stage acid-producing and sulfate-reducing phase anaerobic reactor 1 is pumped to an aerobic oxidation tank 3 through an external intermediate steady flow tank 2, and the hydrogen sulfide-containing tail gas discharged from the first-stage acid-producing and sulfate-reducing phase anaerobic reactor 1 is sent to the aerobic oxidation tank 3 through an exhaust pipeline I for oxidation absorption.
The aerobic oxidation tank 3 is inoculated with domesticated aerobic flocculent sludge, the sludge concentration is 4500mg/L, and the biological filler is added into the aerobic oxidation tank 3, and the adding proportion is about 30%. The HRT of the aerobic reactor in the aerobic oxidation tank 3 is 12h, the DO concentration is 1.0mg/L, and the pH is 7.5-8.0. Sulfide in the primary anaerobic effluent and hydrogen sulfide in the waste gas are converted into elemental sulfur and sulfate by sulfide oxidizing bacteria in an aerobic reactor. The effluent of the aerobic reactor is pumped to a secondary methanogenic phase anaerobic reactor 5 after precipitation.
And inoculating domesticated anaerobic flocculent sludge in the secondary methanogenic phase anaerobic reactor 5, wherein the sludge concentration is 10000mg/L. The HRT of the second-stage methanogenic phase anaerobic reactor 5 is 24 hours, and the second-stage anaerobic system mainly uses methanogenic bacteria (MPB) to effectively degrade organic matters in the wastewater and reduce the COD of the wastewater. Biogas generated by the secondary anaerobic system is used as stripping inert gas of the primary anaerobic system. The COD concentration of the final effluent is 265mg/L, and the removal rate reaches 97%; the sulfate concentration is 940mg/L, and the removal rate reaches 80%.
In one embodiment, a sludge stirring unit is installed at the bottom of the sedimentation tank 4, and the sludge stirring unit comprises:
the bottom mounting shell 11 is fixedly connected to the bottom of the sedimentation tank 4;
a top mounting case 12, the top mounting case 12 being liftably connected to the bottom mounting case 11;
a sludge rest table 13, the sludge rest table 13 being mounted on the top end of the top mounting shell 12;
a mounting cross plate 14, the mounting cross plate 14 being fixedly attached within the top mounting shell 12;
a lifting assembly 15, wherein the lifting assembly 15 is installed in the bottom installation shell 11 and is connected with the installation transverse plate 14;
an agitating blade 16, two of the agitating blades 16 being disposed opposite to the side end of the top mounting case 12;
the action assemblies 17 are symmetrically arranged in the bottom mounting shell 12 and the top mounting shell 12, and are connected with the stirring blades 16 in a one-to-one correspondence manner, and the lifting assemblies 15 drive the action assemblies 17 to act.
The working principle and beneficial effects of the technical scheme are as follows:
the sludge is settled to the bottom of the sedimentation tank 4, and as the sludge is deposited on the sludge stopping table 13, part of the sludge slides to the bottom of the sedimentation tank 4, as the sludge deposition amount on the sludge stopping table 13 is increased, under the self weight of the sludge, the sludge stopping table 13 is pressed, the top mounting shell 12 connected with the sludge stopping table 13 is settled on the bottom mounting shell 11, as the top mounting shell 12 is settled, the mounting transverse plate 14 installed in the top mounting shell 12 is driven to settle, when the lifting assembly 15 is driven to settle by the mounting transverse plate 14, the lifting assembly 15 drives the action assembly 17 to act, the action assembly 17 drives the stirring blade 16 opposite to the side end of the top mounting shell 12 to rotate, thus as the sludge is settled and deposited on the sludge stopping table 13, the top mounting shell 12 drives the stirring blade 16 to slowly settle, the stirring blade 16 slowly rotates to improve the mobility of the sewage near the top mounting shell 12, thereby guiding the sludge deposited on the sludge stopping table 13 to gradually slide into the bottom of the sedimentation tank 4, reducing the sludge deposition block, as the pump pipeline is carried to work, the sludge deposited on the bottom of the sedimentation tank 4 is sucked, as the sludge deposited on the bottom of the sedimentation tank is gradually moved away by the suction plate 13, the lifting assembly 15 is rapidly reduced, the lifting assembly is rapidly reset, the sludge is rapidly moved to the lifting assembly is rapidly reset, and the bottom is rapidly installed on the bottom of the sedimentation tank is mounted by the lifting assembly 15.
In one embodiment, the lifting assembly 15 comprises:
the vertical tube 18 is fixedly arranged at the bottom end of the mounting transverse plate 14;
the limiting ring 19 is arranged at the end, away from the mounting transverse plate 14, of the vertical tube 18, and the limiting ring 19 is arranged at the end, away from the mounting transverse plate 14, of the vertical tube 18;
the guide post 10 is vertically arranged at the inner bottom of the bottom mounting shell 11, and the vertical tube 18 is sleeved on the guide post 10;
the return spring 21 is sleeved on the guide post 10, and the return spring 21 is propped against between the bottom of the bottom mounting shell 11 and the limiting ring 19;
the transmission rods 25 are symmetrically hinged to the vertical barrels 18, and the ends, far away from the vertical barrels 18, of the transmission rods 25 are connected with the action assemblies 17.
The working principle and beneficial effects of the technical scheme are as follows:
under the self weight of the sludge, the sludge stopping table 13 is pressed, the top mounting shell 12 connected with the sludge stopping table 13 is settled on the bottom mounting shell 11, the mounting transverse plate 14 mounted in the top mounting shell 12 is driven to settle, the mounting transverse plate 14 drives the vertical tube 18 connected with the mounting transverse plate 14 to settle along the guide post 10, and the vertical tube 18 drives the action assembly 17 to work through the transmission rod 25 while the reset spring 21 is contracted, so that the rotation of the stirring blade 16 is realized.
In one embodiment, the action assembly 17 comprises:
the first rotating shaft 22 is rotatably arranged at the inner bottom of the bottom mounting shell 11;
the transverse moving rod 23 is fixedly connected to the inner bottom of the bottom mounting shell 11 through a supporting frame;
the transverse moving sleeve 24 is sleeved on the transverse moving rod 23, and the end, far away from the vertical cylinder 18, of the transmission rod 25 is hinged with the transverse moving sleeve 24;
a drive rack 26, the drive rack 26 being mounted on the traversing sleeve 24;
a first gear 27 and a second gear 28, wherein the first gear 27 and the second gear 28 are coaxially arranged on the first rotating shaft 22, and the first gear 27 is meshed with the transmission rack 26;
the action box 29 is mounted on the mounting transverse plate 14 through a supporting rod, a pair of bevel gears are meshed in the action box 29, the stirring blade 16 is mounted on a rotating shaft III, the rotating shaft III is rotatably mounted on the top mounting shell 12, and the rotating shaft III extends into the action box 29 and is connected with one of the bevel gears;
the long gear 20, the long gear 20 is installed on the installation diaphragm 14 through a second rotating shaft, the long gear 20 is meshed with a second gear 28, and the second rotating shaft extends into the action box 29 and is connected with the other bevel gear.
The working principle and beneficial effects of the technical scheme are as follows:
the vertical cylinder 18 drives the traversing sleeve 24 to slide on the traversing rod 23 in a direction far away from the guide post 10 through the transmission rod 25, so that the transmission rack 26 arranged on the traversing sleeve 24 is driven to rotate in cooperation with the first gear 27, the first gear 27 drives the second gear 28 to rotate through the first rotating shaft 22, the second gear 28 drives the second rotating shaft to rotate through the long gear 20, the second rotating shaft drives the third rotating shaft through a pair of bevel gears which are positioned in the action box 29 and meshed with each other, and the stirring blade 16 arranged on the third rotating shaft rotates, so that the stirring operation of sludge is realized.
The embodiment further provides a comprehensive treatment method for high-concentration sulfate organic wastewater and process exhaust gas, which is used for the comprehensive treatment system for high-concentration sulfate organic wastewater and process exhaust gas, and comprises the following steps:
step 1, a water inlet pump of a primary acid-producing and sulfate-reducing phase anaerobic reactor 1 is turned on, and wastewater containing high-concentration sulfate is sent into the primary acid-producing and sulfate-reducing phase anaerobic reactor 1 from a water inlet tank through a water inlet pipeline and a water distributor;
step 2, opening a water outlet valve of the first-stage acid-producing and sulfate-reducing phase anaerobic reactor 1, and enabling the water to flow automatically to an intermediate steady flow tank 2, wherein hydrogen sulfide-containing waste gas generated by the first-stage acid-producing and sulfate-reducing phase anaerobic reactor 1 is sent into an aerobic oxidation tank 3 through a waste gas pipeline I;
step 3, opening a water inlet pump of the aerobic oxidation tank 3, lifting wastewater from the intermediate steady flow tank 2 into the aerobic oxidation tank 3 through a pipeline and a pump, opening a water outlet valve of the aerobic oxidation tank 3, and automatically flowing the muddy water mixed solution to the sedimentation tank 4;
step 4, opening a water outlet valve of the sedimentation tank 4 and a water inlet pump of the secondary methanogenic phase anaerobic reactor 5, sending supernatant into the secondary methanogenic phase anaerobic reactor 5 through a water inlet pipeline and a water distributor, and sending bottom sludge into the aerobic oxidation tank 3 through a sludge reflux pump;
and 5, opening a water outlet valve of the second-stage methanogenic phase anaerobic reactor 5, enabling water to flow out, and discharging biogas of the second-stage methanogenic phase anaerobic reactor 5 into the first-stage acidogenic and sulfate reduction phase anaerobic reactor 1 through a second exhaust pipeline for stripping.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (7)
1. A high-concentration sulfate organic wastewater and process waste gas comprehensive treatment system is characterized by comprising:
the system comprises a primary acid-producing, sulfate-reducing phase anaerobic reactor (1), an intermediate steady flow tank (2), an aerobic oxidation tank (3), a sedimentation tank (4) and a secondary methane-producing phase anaerobic reactor (5) which are sequentially connected, wherein the primary acid-producing, sulfate-reducing phase anaerobic reactor (1) and the secondary methane-producing phase anaerobic reactor (5) are both anaerobic up-flow sludge bed reactors, a sludge area, a reaction area and a three-phase separation area are respectively arranged in the anaerobic up-flow sludge bed reactor from bottom to top, hydrogen sulfide-containing waste gas generated by the primary acid-producing, sulfate-reducing phase anaerobic reactor (1) is sent into the aerobic oxidation tank (3) through a first waste gas pipeline, and methane generated by the secondary methane-producing phase anaerobic reactor (5) is sent into the primary acid-producing, sulfate-reducing phase anaerobic reactor (1) through a second waste gas pipeline for blowing off;
a sludge stirring unit is arranged at the bottom of the sedimentation tank (4), and comprises: the device comprises a bottom mounting shell (11) fixedly connected to the bottom of a sedimentation tank (4), a top mounting shell (12) is connected to the bottom mounting shell (11) in a lifting manner, a sludge stopping table (13) is mounted at the top end of the top mounting shell (12), a mounting transverse plate (14) is fixedly connected to the top mounting shell (12), a lifting assembly (15) is mounted in the bottom mounting shell (11) and is connected with the mounting transverse plate (14), two stirring blades (16) are oppositely arranged at the side end of the top mounting shell (12), two action assemblies (17) are symmetrically mounted in the bottom mounting shell (11) and the top mounting shell (12) and are connected with the stirring blades (16) in a one-to-one correspondence manner, and the lifting assembly (15) drives the action assemblies (17) to act;
the lifting assembly (15) comprises: the device comprises a vertical cylinder (18) fixedly arranged at the bottom end of an installation transverse plate (14), a limiting ring (19) is arranged at the end, far away from the installation transverse plate (14), of the vertical cylinder (18), a guide post (10) is vertically arranged at the inner bottom of a bottom installation shell (11), the vertical cylinder (18) is sleeved on the guide post (10), a reset spring (21) is sleeved on the guide post (10), the reset spring (21) is propped between the inner bottom of the bottom installation shell (11) and the limiting ring (19), two transmission rods (25) are symmetrically hinged to the vertical cylinder (18), and the end, far away from the vertical cylinder (18), of the transmission rods (25) is connected with an action assembly (17);
the action assembly (17) comprises: the device comprises a first rotating shaft (22) which is rotatably arranged at the inner bottom of a bottom mounting shell (11), a transverse moving rod (23) is fixedly connected to the inner bottom of the bottom mounting shell (11) through a supporting frame, a transverse moving sleeve (24) is sleeved on the transverse moving rod (23), a transmission rod (25) is hinged to the transverse moving sleeve (24) away from the end of a vertical cylinder (18), a transmission rack (26) is arranged on the transverse moving sleeve (24), a first gear (27) and a second gear (28) are coaxially arranged on the first rotating shaft (22), the first gear (27) is meshed with the transmission rack (26), a motion box (29) is arranged on a mounting transverse plate (14) through a supporting rod, a pair of bevel gears are meshed in the motion box (29), stirring blades (16) are arranged on a third rotating shaft, the third rotating shaft is arranged on the top mounting shell (12), the third rotating shaft stretches into the motion box (29) and is connected with one bevel gear, the second gear (20) is arranged on the upper rotating shaft (14), and stretches into the second bevel gear (28) through the second bevel gear, and is meshed with the second bevel gear (20).
2. The comprehensive treatment system for the high-concentration sulfate organic wastewater and the process waste gas according to claim 1 is characterized in that the primary acid-producing and sulfate-reducing phase anaerobic reactor (1) and the secondary methane-producing phase anaerobic reactor (5) are of double-layer jacket structures, the outer layers of the primary acid-producing and sulfate-reducing phase anaerobic reactor (1) and the secondary methane-producing phase anaerobic reactor (5) are constant-temperature heat preservation layers, the internal temperature of the primary acid-producing and sulfate-reducing phase anaerobic reactor (1) is controlled to be 30-35 ℃, the pH is controlled to be 6.0-7.0, the hydraulic retention time is controlled to be 6-12h, the internal temperature of the secondary methane-producing phase anaerobic reactor (5) is controlled to be 33-37 ℃, the pH is controlled to be 7.5-8.5, and the hydraulic retention time is controlled to be 12-24h.
3. The comprehensive treatment system for high-concentration sulfate organic wastewater and process waste gas according to claim 1, wherein flocculent anaerobic sludge is inoculated in the primary acid-producing and sulfate-reducing phase anaerobic reactor (1) and the secondary methane-producing phase anaerobic reactor (5), and the sludge concentration is 10-20g/L.
4. The comprehensive treatment system for high-concentration sulfate organic wastewater and process exhaust gas according to claim 1, wherein hydrophobic biological filler is added into the aerobic oxidation tank (3), and the filler addition ratio is 30-40%.
5. The comprehensive treatment system for the high-concentration sulfate organic wastewater and the process exhaust gas according to claim 1, wherein the aerobic oxidation tank (3) is inoculated with aerobic flocculent sludge, the sludge concentration is 4-6g/L, an aeration disc is arranged at the bottom of the aerobic oxidation tank (3), the dissolved oxygen concentration in the tank is 1-1.5mg/L, and the temperature in the aerobic oxidation tank (3) is 20-32 ℃ and the pH is 7-8.
6. The integrated treatment system of high concentration sulfate organic wastewater and process exhaust gas according to claim 1, wherein the bottom of the sedimentation tank (4) is connected with the aerobic oxidation tank (3) through a pipeline with a pump, and the surface load of the sedimentation tank (4) is 1.0-1.8 m/(. Square meter) h).
7. A method for comprehensively treating high-concentration sulfate organic wastewater and process exhaust gas, which is used for the high-concentration sulfate organic wastewater and process exhaust gas comprehensive treatment system according to any one of claims 1 to 6, and is characterized by comprising the following steps:
step 1, a water inlet pump of a first-stage acid-producing and sulfate-reducing phase anaerobic reactor (1) is turned on, and wastewater containing high-concentration sulfate is sent into the first-stage acid-producing and sulfate-reducing phase anaerobic reactor (1) from a water inlet tank through a water inlet pipeline and a water distributor;
step 2, opening a water outlet valve of the first-stage acid-producing and sulfate-reducing phase anaerobic reactor (1), enabling the water to flow automatically to an intermediate steady flow tank (2), and enabling hydrogen sulfide-containing waste gas generated by the first-stage acid-producing and sulfate-reducing phase anaerobic reactor (1) to be sent into an aerobic oxidation tank (3) through a waste gas pipeline I;
step 3, opening a water inlet pump of the aerobic oxidation tank (3), lifting wastewater from the intermediate steady flow tank (2) into the aerobic oxidation tank (3) through a pipeline and a pump, opening a water outlet valve of the aerobic oxidation tank (3), and automatically flowing mud-water mixed solution to the sedimentation tank (4);
step 4, opening a water outlet valve of the sedimentation tank (4) and a water inlet pump of the secondary methanogenic phase anaerobic reactor (5), sending supernatant into the secondary methanogenic phase anaerobic reactor (5) through a water inlet pipeline and a water distributor, and sending bottom sludge into the aerobic oxidation tank (3) through a sludge reflux pump;
and 5, opening a water outlet valve of the secondary methanogenic phase anaerobic reactor (5), enabling water to flow out, and discharging biogas of the secondary methanogenic phase anaerobic reactor (5) into the primary acidogenic and sulfate reduction phase anaerobic reactor (1) through a second exhaust pipeline for stripping.
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