CN210103705U - Environment-friendly efficient composite domestic sewage treatment system for thermal power plant - Google Patents
Environment-friendly efficient composite domestic sewage treatment system for thermal power plant Download PDFInfo
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- CN210103705U CN210103705U CN201920828197.6U CN201920828197U CN210103705U CN 210103705 U CN210103705 U CN 210103705U CN 201920828197 U CN201920828197 U CN 201920828197U CN 210103705 U CN210103705 U CN 210103705U
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Abstract
The utility model discloses an environment-friendly efficient composite domestic sewage treatment system for thermal power plants, wherein a water inlet is arranged on an anaerobic zone, the bottom of the aerobic zone is provided with an aeration device, a sedimentation filtering zone is provided with a filtering zone and an inclined tube sedimentation zone from top to bottom, wherein, the filtering zone is internally provided with a hydraulic cyclone tube, the filtering zone is internally filled with foam filter beads, the inclined tube sedimentation zone is internally provided with inclined tube filler, the bottom opening of the inclined tube sedimentation zone is connected with a sludge hopper, the communication position of the sedimentation filtering zone and a clear water zone is positioned above the filtering zone, and the side surface of the clear water zone is provided with a clear water outlet; be provided with the filler district in the good oxygen district, wherein, the filler district is located aeration equipment's top, and the filler district intussuseption is filled with growth filler, and aquatic plant grows in the filler district, and the root system of aquatic plant extends to the below in filler district, and the play water quality of water of this system is better, and the cost is lower, and system stability is good, and the treatment effeciency is high.
Description
Technical Field
The utility model belongs to the technical field of thermal power plant's domestic sewage treatment, a compound thermal power plant's domestic sewage treatment system of environment-friendly high efficiency is related to.
Background
The contradiction between water resource supply and demand of the thermal power plant in China is prominent, the sewage discharge of the thermal power plant is reduced, the sewage treatment level is improved, and the reuse rate of water resources is increased, which is an important measure for ensuring the environment and improving the productivity. The treatment and the reuse of the domestic sewage are one of important ways for effectively relieving the shortage of water resources of power plants in the north.
At present, the domestic sewage treatment technologies of power plants mainly include physical treatment technologies (such as gratings and sedimentation tanks), chemical treatment technologies (such as coagulation and the like), biological treatment technologies (such as biological filters and contact oxidation) and combinations of the above process technologies. Wherein the biological treatment technology has the advantages of strong purification capability, low cost, good operation reliability and the like, and is a main method for treating domestic sewage. The current mainstream treatment process comprises the following steps: buried contact oxidation process, aeration biological fluidized bed process (ABFT), anaerobic-anoxic-aerobic (A2/O) process, etc. However, from the actual research situation, most of the power plant domestic sewage treatment facilities have the defects of low microorganism concentration, difficult biofilm formation, large fluctuation of effluent water quality and the like, and the operation environment is poor.
The type of pollutants in the domestic sewage of the thermal power plant is approximately the same as that in the domestic sewage of the city, mainly COD and BOD5SS and ammonia nitrogen, but compared with municipal sewage, the power plantThe quality and quantity of domestic sewage are unstable and fluctuate greatly, so the selected process must be able to withstand a certain impact load. In addition, compared with municipal sewage, the power plant domestic sewage contains lower organic matters, ammonia nitrogen and other nutrient substances, has low biodegradability, and is not suitable for adopting a conventional biological treatment method.
The artificial wetland is a marsh land similar to a marsh land which is constructed and controlled to operate artificially. The sewage and sludge are controlled and dosed to the artificially constructed wetland, and in the process of flowing along a certain direction, the sewage and sludge are treated by mainly utilizing the physical, chemical and biological synergistic effects of soil, artificial media, plants and microorganisms. The action mechanism of the plant nutrient solution comprises the actions of adsorption, detention, filtration, oxidation reduction, precipitation, microbial decomposition, transformation, plant shielding, residue accumulation, transpiration moisture and nutrient absorption and various animals. However, the conventional artificial wetland has the problems of large occupied area, great influence by seasons, low treatment efficiency and the like.
AAO is a common sewage treatment process, can be used for secondary sewage treatment or tertiary sewage treatment and reclaimed water recycling, and has good denitrification and dephosphorization effects. Through the anaerobic process, part of refractory organic matters in the wastewater are removed, so that the biodegradability of the wastewater is improved, a carbon source suitable for the denitrification process is provided for a subsequent anoxic section, and the purpose of efficiently removing pollutants is finally achieved.
The conventional sewage or wastewater treatment and filtration processes comprise a quartz sand filter, an activated carbon filter, a multi-media filter, an iron and manganese removal filter and a precision filter, wherein the filters are collectively called as mechanical filters, mainly filter and intercept, adsorb particulate matters and metal ions in water, and recover and regenerate through backwashing and forward washing, and the filters are also repeatedly used. Traditional filter material has quartz sand, anthracite, active carbon, magnetite, makes up garnet, porous ceramic, plastic pellet etc. but traditional filter material proportion is great, takes place the inconsistent condition of filter material porosity easily to cause the water distribution inequality, can produce a large amount of backwash waste water when wasing the filter material, traditional filter backwash frequency is high, the energy consumption is high, and need be equipped with two sets of backwash systems of washing and gas washing, the cost is higher.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a compound thermal power plant domestic sewage treatment system of environment-friendly high efficiency, this system's play water quality of water is better, and the cost is lower, and system stability is good, and the treatment effeciency is high.
In order to achieve the purpose, the environment-friendly efficient composite domestic sewage treatment system for the thermal power plant comprises an equipment body and aquatic plants, wherein the inside of the equipment body is divided into an anaerobic zone, an anoxic zone, an aerobic zone, a precipitation filtering zone and a clear water zone which are sequentially communicated, wherein the anaerobic zone is provided with a water inlet, the bottom of the aerobic zone is provided with an aeration device, the precipitation filtering zone is provided with a filtering zone and an inclined tube settling zone from top to bottom, a hydraulic cyclone tube is arranged in the filtering zone, foam filter beads are filled in the filtering zone, inclined tube filler is arranged in the inclined tube settling zone, the bottom opening of the inclined tube settling zone is connected with a sludge hopper, the communicating position of the precipitation zone and the clear water zone is positioned above the filtering zone, and the side surface of the clear water zone is provided with a clear water outlet;
a filler area is arranged in the aerobic area, wherein the filler area is positioned above the aeration device, a growth filler is filled in the filler area, the aquatic plant grows in the filler area, and the root system of the aquatic plant extends to the lower part of the filler area.
The bottom of the anoxic zone is provided with a first mixed liquid reflux pump, wherein an outlet of the first mixed liquid reflux pump is communicated with the anaerobic zone.
The bottom in good oxygen district is provided with the mixed liquid backwash pump of second, and wherein, the export of the mixed liquid backwash pump of second is linked together with the anoxic zone.
And a cleaning pump is arranged in the clean water area, wherein the cleaning pump is communicated with a cleaning water inlet on the side surface of the top of the precipitation filtering area, and the cleaning water inlet is positioned above the filtering area.
And the tops of the anaerobic zone, the anoxic zone, the aerobic zone, the precipitation filtering zone and the clear water zone are provided with access holes.
An overflow weir is arranged at the communication position of the precipitation filtering area and the clear water area.
The aquatic plant is a cold-resistant aquatic plant.
The utility model discloses following beneficial effect has:
environment-friendly high-efficient compound thermal power plant domestic sewage treatment system of type when concrete operation, combine together biochemical treatment and constructed wetland treatment, make sewage reach dual treatment, COD, BOD, total nitrogen, total phosphorus, ammonia nitrogen and suspended solid all are superior to the one-level A index in national "town sewage treatment plant discharge standard", in order to improve the quality of water of going out, specifically, aeration equipment in the aerobic zone provides certain dissolved oxygen, ensure the required oxygen content of microorganism and aquatic plant growth, the aquatic plant root system provides the attached place of microorganism, be favorable to the growth and reproduction of microorganism, the concentration of microorganism has been guaranteed, make the more stable operation of system, nitrobacteria in the aerobic zone converts the ammonia nitrogen that flows into nitrate and nitrite through biological nitrification, BOD is got rid of simultaneously, and absorb phosphorus, reach finally and get rid of COD high-efficient, BOD, N, P's purpose, the stability of system is better, and treatment cost is lower, simultaneously the utility model discloses will deposit and filter integrated in deposiing the filtering area to reduce area. Tests show that under the condition of the same removal rate, the planting area of the aquatic plants in the aerobic zone is only 20-40% of the land occupation area of the conventional artificial wetland water treatment process, and the management is convenient.
Furthermore, cold-resistant aquatic plants are adopted, so that the influence of seasons is small, the operation effect is stable, and the ecological landscape can be used as landscape greening to increase the ornamental value.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is the equipment body, 2 is the water inlet, 3 is the anaerobic zone, 4 is the anoxic zone, 5 is the aerobic zone, 6 is the precipitation filtering zone, 7 is the clear water district, 8 is the access hole, 91 is first mixed liquid backwash pump, 92 is second mixed liquid backwash pump, 10 is aeration equipment, 11 is the growth filler, 12 is the aquatic plant, 13 is the foam filter pearl, 14 is hydraulic conductance pipe, 15 is the pipe chute settling zone, 16 is the sludge bucket, 17 is the mud bucket, 18 is the overflow weir, 19 is the scavenging pump, 20 is the clear water export.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the environment-friendly efficient composite domestic sewage treatment system for thermal power plants comprises an equipment body 1 and aquatic plants 12, the inside of the equipment body 1 is divided into an anaerobic zone 3, an anoxic zone 4, an aerobic zone 5, a precipitation filtering zone 6 and a clean water zone 7 which are sequentially communicated, wherein the anaerobic zone 3 is provided with a water inlet 2, the bottom of the aerobic zone 5 is provided with an aeration device 10, the precipitation filtering zone 6 is provided with a filtering zone and an inclined tube precipitation zone 15 from top to bottom, a hydraulic cyclone tube 14 is arranged in the filtering zone, the filtering zone is filled with foam filter beads 13, the inclined tube precipitation zone 15 is internally provided with inclined tube fillers, the bottom opening of the inclined tube precipitation zone 15 is connected with a sludge hopper 16, the communication position of the precipitation filtering zone 6 and the clean water zone 7 is positioned above the filtering zone, and the side of the clean water zone 7 is provided with a clean water outlet 20; a filling area is arranged in the aerobic area 5, wherein the filling area is positioned above the aeration device 10, the filling area is filled with growth filling 11, aquatic plants 12 grow in the filling area, the root systems of the aquatic plants 12 extend to the lower part of the filling area, and a sludge discharge port 17 is arranged on a sludge hopper 16.
A first mixed liquid reflux pump 91 is arranged at the bottom of the anoxic zone 4, wherein the outlet of the first mixed liquid reflux pump 91 is communicated with the anaerobic zone 3; a second mixed liquid reflux pump 92 is arranged at the bottom of the aerobic zone 5, wherein the outlet of the second mixed liquid reflux pump 92 is communicated with the anoxic zone 4; a cleaning pump 19 is arranged in the clean water area 7, wherein the cleaning pump 19 is communicated with a cleaning water inlet on the top side surface of the precipitation filtering area 6, and the cleaning water inlet is positioned above the filtering area.
The tops of the anaerobic zone 3, the anoxic zone 4, the aerobic zone 5, the precipitation filtering zone 6 and the clear water zone 7 are provided with access holes 8; an overflow weir 18 is arranged at the communication position of the precipitation filtering area 6 and the clear water area 7; the aquatic plant 12 is a cold-resistant aquatic plant.
The utility model discloses a concrete working process does:
the sewage to be treated enters an anaerobic zone 3, wherein the dissolved oxygen in the anaerobic zone 3 is less than 0.2mg/L so as to release phosphorus bacteria in the sewage to be treated, and meanwhile, part of organic matters in the sewage to be treated are aminated so as to degrade and remove part of organic matters which are difficult to degrade in the sewage to be treated; the sewage output by the anaerobic zone 3 enters an anoxic zone 4, wherein the dissolved oxygen of the anoxic zone 4 is 0.2-0.5mg/L, so that nitrate nitrogen and nitrite nitrogen in the sewage are converted into nitrogen and overflow under the anoxic condition, the sewage discharged by the anoxic zone 4 enters an aerobic zone 5, wherein the aeration device 10 is used for providing the dissolved oxygen for the aerobic zone 5 to ensure the growth of microorganisms and aquatic plants 12 in the aerobic zone 5, meanwhile, the dissolved oxygen of the aerobic zone 5 is controlled at 1-3mg/L, ammonia nitrogen and organic nitrogen in the sewage are converted into nitrate by nitrobacteria in the aerobic zone 5, phosphorus in the sewage is absorbed, the sewage discharged by the aerobic zone 5 enters a filtering zone 6 through the bottom of the filtering and precipitating zone 6, then enters a clear water zone 7 after being filtered by an inclined tube precipitating zone 15 and a filtering zone and then overflows, wherein, the sludge precipitated in the inclined tube precipitation zone 15 enters a sludge hopper 16, and the clear water in the clear water zone 7 is discharged through a clear water outlet 20.
The anoxic zone 4 and the aerobic zone 5 are respectively provided with a first mixed liquid reflux pump 91 and a second mixed liquid reflux pump 92, so that nitrate nitrogen in the sludge is refluxed into the previous subarea to generate nitration reaction, and nitrate and nitrite brought back by the reflux are converted into nitrogen through biological denitrification, so as to achieve the purpose of better denitrification.
The aerobic zone 5 is equipped with aeration equipment 10 and aquatic plant 12, and this aquatic plant 12 can be for the iris, the utility model discloses well growth filler 11 is used for bearing and fixes the flourishing aquatic plant 12 of many years root system, and the fungus crowd for handling sewage provides the attached place of growth that is enough big, ensures that the microorganism concentration of aquatic keeps at higher level under the outdoor environment in winter to overwinter smoothly.
The hydraulic cyclone 14 can play a role in stirring in the rotating process, so that the filter material is prevented from being blocked and hardened, an air washing device is not needed, and the cleaning energy consumption is saved.
The foam filter material has light specific gravity and is in a suspension state in water, the foam filter material in the filter material area is uniformly distributed, the contact area with water is large, the filtering effect is good, the filtering resistance is small, the head loss is low, and the lift of the cleaning pump 19 is small, so that the energy consumption is reduced.
It should be noted that, the utility model combines the traditional AAO process with the artificial wetland water treatment technology, the aeration device 10 in the aerobic zone 5 provides a certain dissolved oxygen to ensure the growth oxygen demand of the microorganism and the aquatic plant 12, the root system of the aquatic plant 12 provides the attachment place of the microorganism, which is beneficial to the growth and reproduction of the microorganism, and ensures the concentration of the microorganism, so that the system can operate more stably; nitrifying bacteria in the aerobic zone 5 convert inflowing ammonia nitrogen into nitrate and nitrite through biological nitrification, and simultaneously remove BOD and absorb phosphorus, so that the aim of efficiently removing COD, BOD, N and P is finally achieved, the roots of the aquatic plants 12 can absorb a part of nitrogen and phosphorus as nutrient substances, and the quality of effluent water is further improved.
The sedimentation filtering area 6 integrates sedimentation and filtration, so that the occupied area is saved, the specific gravity of the foam filter beads 13 is small, the specific surface area is large, the backwashing frequency and the lift of a backwashing pump are reduced, and the backwashing frequency is less than 50% of the backwashing frequency of the traditional filter, so that the energy consumption is reduced.
Claims (7)
1. An environment-friendly efficient composite domestic sewage treatment system of a thermal power plant is characterized by comprising an equipment body (1) and aquatic plants (12), wherein the inside of the equipment body (1) is divided into an anaerobic zone (3), an anoxic zone (4), an aerobic zone (5), a precipitation filtering zone (6) and a clear water zone (7) which are sequentially communicated, a water inlet (2) is formed in the anaerobic zone (3), an aeration device (10) is arranged at the bottom of the aerobic zone (5), the precipitation filtering zone (6) is provided with a filtering zone and an inclined tube precipitating zone (15) from top to bottom, a hydraulic cyclone tube (14) is arranged in the filtering zone, foam filter beads (13) are filled in the filtering zone, inclined tube filling materials are arranged in the inclined tube precipitating zone (15), an opening at the bottom of the inclined tube precipitating zone (15) is connected with a sludge hopper (16), and the communication position of the precipitation filtering zone (6) and the clear water zone (7) is positioned above the filtering zone, a clear water outlet (20) is arranged on the side surface of the clear water area (7);
a filling area is arranged in the aerobic area (5), wherein the filling area is positioned above the aeration device (10), a growth filling (11) is filled in the filling area, the aquatic plants (12) grow in the filling area, and the root systems of the aquatic plants (12) extend to the lower part of the filling area.
2. The environment-friendly efficient composite thermal power plant domestic sewage treatment system according to claim 1, wherein the bottom of the anoxic zone (4) is provided with a first mixed liquor reflux pump (91), wherein the outlet of the first mixed liquor reflux pump (91) is communicated with the anaerobic zone (3).
3. The environment-friendly efficient composite thermal power plant domestic sewage treatment system according to claim 2, wherein a second mixed liquid reflux pump (92) is provided at the bottom of the aerobic zone (5), wherein the outlet of the second mixed liquid reflux pump (92) is communicated with the anoxic zone (4).
4. The environment-friendly efficient combined thermal power plant domestic sewage treatment system according to claim 1, wherein a cleaning pump (19) is arranged in the clean water zone (7), wherein the cleaning pump (19) is communicated with a cleaning water inlet on the top side of the precipitation filtering zone (6), and the cleaning water inlet is positioned above the filtering zone.
5. The environment-friendly efficient composite domestic sewage treatment system for thermal power plants as defined in claim 1, wherein the tops of the anaerobic zone (3), the anoxic zone (4), the aerobic zone (5), the precipitation filtration zone (6) and the clear water zone (7) are provided with manholes (8).
6. The environment-friendly efficient composite thermal power plant domestic sewage treatment system according to claim 1, wherein an overflow weir (18) is arranged at the communication position of the precipitation filtering area (6) and the clean water area (7).
7. The environmental-friendly efficient compound thermal power plant domestic sewage treatment system according to claim 1, wherein the aquatic plants (12) are cold-resistant aquatic plants.
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| CN201920828197.6U CN210103705U (en) | 2019-06-03 | 2019-06-03 | Environment-friendly efficient composite domestic sewage treatment system for thermal power plant |
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| CN201920828197.6U CN210103705U (en) | 2019-06-03 | 2019-06-03 | Environment-friendly efficient composite domestic sewage treatment system for thermal power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110104900A (en) * | 2019-06-03 | 2019-08-09 | 西安西热水务环保有限公司 | A kind of environmentally friendly high efficiency composition thermal power plant domestic sewage processing system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110104900A (en) * | 2019-06-03 | 2019-08-09 | 西安西热水务环保有限公司 | A kind of environmentally friendly high efficiency composition thermal power plant domestic sewage processing system and method |
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