CN111559831A - Sludge coupling power generation drying wastewater full-flow treatment system and method - Google Patents
Sludge coupling power generation drying wastewater full-flow treatment system and method Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C02F1/5281—Installations for water purification using chemical agents
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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Abstract
The invention discloses a sludge coupling power generation drying wastewater full-flow treatment system and method, which comprises the treatment of waste gas condensate generated in the drying process, cooling tower sewage, acid-base neutralization wastewater and flushing wastewater. Aiming at the characteristics of poor biodegradability of wastewater, high ammonia nitrogen and total nitrogen and the like, the system adopts a method of dividing units, grading and dividing qualities to carry out full-flow recovery and treatment. The comprehensive COD of the wastewater is 1500-2500 mg/L, BOD and 450-750 mg/L, NH3N is 360-600 mg/L, TN and 420-700 mg/L, SS and 210-350 mg/L, the effluent treated by the system can reach the first-class A standard, and SS of the treated flushing wastewater meets the recycling requirement. The system has high treatment load, low treatment cost, environmental protection, energy conservation, stable effluent quality, effective reuse of effluent and reduction of sludge in the system.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a sludge coupling power generation drying wastewater full-flow treatment system and method.
Background
The sludge treatment process scheme adopts drying and thermal power plant coupling, the core equipment adopts a drying homogenizer and matched dedusting and condensing equipment, and the heat source adopts steam. The dried wastewater generated by the process has the characteristics of weak biodegradability, high ammonia nitrogen, high total nitrogen and the like, and the surface water, soil, underground water environment and the like can be influenced if the dried wastewater is carelessly treated.
Research shows that the pH value of the sludge drying condensate water is 6-9, the concentrations of ammonia nitrogen, total nitrogen, COD and BOD are (550 +/-50) mg/L, (600 +/-55) mg/L, (2500 +/-500) mg/L and (1000 +/-250) mg/L respectively, and the sludge drying condensate water belongs to high-concentration organic wastewater.
The municipal sludge drying condensate wastewater is mainly formed by cooling sludge drying condensate steam, wherein the sludge drying steam contains dust and organic matters. In order to reduce the organic load in the condensed steam, the treatment can be carried out by adopting an activated carbon adsorption method. The treatment effect of treating the wastewater in a steam state by using the activated carbon is better than that of directly putting the activated carbon into the wastewater, and no sludge is generated. For the water quality of the incoming water containing larger particles, the pretreatment can be carried out by a grading treatment process and a process combining a grating and settled sand. Because the concentration of ammonia nitrogen and total nitrogen in the condensed water is higher, the A/O, the oxidation ditch and the biomembrane method are considered to be adopted for removing the pollutants, and the nitrification and denitrification processes are generally required for removing the nitrogen.
The sludge drying condensation wastewater treatment process is a grating → sand setting → primary setting → oxygen deficiency → secondary sedimentation tank, but the recycled water quality obtained by the process cannot reach the first class B standard of pollutant discharge of urban sewage treatment plants. And the sludge drying and condensing wastewater treatment process only passes through a hydrolysis acidification tank, a contact oxidation tank and a sedimentation tank, which is only suitable for the processes with few pollutant types and low concentration. In addition, the dried condensed wastewater is treated by the process method of 'A/O + MBR', the effluent quality only reaches the first-level B discharge standard, and the process is relatively complex and inconvenient to operate.
For the high-concentration organic sludge drying wastewater with complex components, based on the common sludge drying wastewater treatment method, according to the water quality characteristics of the invention, COD and NH are treated3The removal rate of-N, total nitrogen and SS is higher, so the process of sludge coupling power generation drying wastewater treatment can adopt the thinking of classification, quality classification and unit classification to carry out process design.
Disclosure of Invention
The invention aims to provide a sludge coupling power generation drying wastewater full-flow treatment system and method, which can effectively treat wastewater containing various sources and can realize a unit treatment process for each strand of wastewater; the treatment load is effectively reduced, the treatment cost is reduced, and the effluent quality is good; the treated effluent can be effectively recycled and supplemented with water circularly; the sludge generated by the system can realize internal decrement treatment, and the characteristics of environmental protection and energy conservation are reflected.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a sludge coupling power generation drying wastewater full-flow treatment system comprises the following units:
and arranging an acid-base wastewater storage unit for collecting acid-base cleaning wastewater of the drying condenser.
The device is provided with a washing wastewater collection unit for collecting washing drainage of the high-efficiency dust remover and washing water on the ground, the water contains high-concentration suspended matters, the high-efficiency washing precipitation device is used for treating the water, and the effluent flows to a washing water tank to be used as subsequent recycling.
Setting a pretreatment unit; the adjusting water tank is mainly used for collecting waste gas condensate, cooling tower sewage and acid-base waste water from the storage tank. The incoming water is mixed in the regulating water tank, and simultaneously, oil stain and suspended matters in the incoming water are reduced by adopting dissolved air flotation.
Setting a biochemical unit; firstly, the biodegradability of water quality is improved by pretreatment through a hydrolysis acidification tank, then ammonia nitrogen and total nitrogen in a water body are removed by utilizing a multi-stage A/O process, and the process comprises nitrifying liquid reflux and high-activity sludge reflux.
Setting a depth processing unit; and (3) further treating pollutants in the water body, wherein the effluent of the biochemical unit firstly flows to the vertical sheet fiber filter to further remove suspended matters in the water body, and the effluent of the filter enters an ozone strong oxidation device for aeration treatment to strengthen the removal of COD. The water discharged by the ozone strong oxidation device stays in a clean water tank and can be used as the recycled water and the washing water of a power plant for water supplement.
Setting a sludge reduction unit; contain sludge concentration tank and sludge decrement device to washing the active sludge that high-efficient sediment device, dissolved air flotation device and biochemical unit produced, collect, concentrate, dehydration to realize the minimizing process of mud, the hydroextractor goes out mud and can carry out the mummification through screw rod pump sending to mud storehouse and handle.
In the flushing wastewater collection unit, the flushing high-efficiency precipitation device is provided with a two-section mixing zone, a flocculation zone and a precipitation zone, and coagulant aid are added into the wastewater to enable suspended matters in the wastewater to form larger colloidal particles, so that SS and non-dissolved COD in the wastewater are reduced. Wherein, the mixing area and the flocculation area are respectively provided with a stirrer, and the sedimentation area is provided with a reflux pump and a sludge discharge pump.
In the washing wastewater collection unit, the washing water tank mainly collects the effluent of the washing high-efficiency precipitation device for recycling. The wash basin kit is equipped with a wash basin lift pump.
In the pretreatment unit, the adjusting water tank is mainly used for collecting and mixing waste gas condensate, cooling tower sewage and acid-base waste water from the storage tank, so that continuous water inlet of a subsequent process can be guaranteed.
In the pretreatment unit, the dissolved air flotation device mainly utilizes the air flotation principle, and bubbles are attached to the surfaces of fine particles by aerating in water, so that the particle density is reduced, and oil stains and fine particles are quickly removed.
In the biochemical unit, the front end of the hydrolysis acidification tank is provided with a water inlet end, and the rear end is provided with a precipitation area; a submersible stirrer is arranged in the hydrolysis acidification pool, and a sludge discharge pump is arranged in the sedimentation area. The phosphorus content in the inlet water of the hydrolysis acidification tank is relatively low, the requirement of activated sludge growth can not be met, and a phosphate fertilizer dosing system is used for supplementing phosphorus.
In the biochemical unit, the first-stage anoxic tank mainly serves for denitrification and removal of a small amount of organic matters. The matched equipment of the first-section anoxic pond is provided with a submersible stirrer. A sodium acetate dosing tube is arranged for supplementing a carbon source, but is only used as a remedial measure, and the carbon source is not added in the first-stage anoxic tank under normal conditions.
In the biochemical unit, the first section of the aerobic tank is mainly used for removing organic matters and converting ammonia nitrogen into nitrate nitrogen through nitration reaction. The equipment matched with the first section of aerobic tank comprises: an oxygen supply fan, an energy-saving aerator, a mixed liquid reflux pump (meeting the reflux ratio of 400 percent) and a reflux pump flowmeter. When the alkalinity of the aerobic tank is detected to be insufficient, the feed is added to ensure that the nitrification reaction in the aerobic tank can be normally carried out.
In the biochemical unit, the two-stage anoxic tank mainly serves for denitrification and removal of a small amount of organic matters. The second-stage anoxic tank is matched with equipment which is provided with a submersible stirrer. The front section of the two-section anoxic tank is provided with a sodium acetate dosing port to ensure that the total nitrogen reaches the standard and is removed.
In the biochemical unit, the two-stage aerobic tank is mainly used for removing organic matters and converting ammonia nitrogen into nitrate nitrogen through nitration reaction. The equipment matched with the two-section aerobic tank comprises: an oxygen supply fan (shared with a section of aerobic tank) and an energy-saving aerator. And the second-stage aerobic tank is provided with sodium carbonate for adding chemicals to supplement alkalinity, and the chemicals are added when the alkalinity of the first-stage aerobic tank is normal and the alkalinity of the second-stage aerobic tank is insufficient (under normal conditions, the chemicals are not added).
In the biochemical unit, the secondary sedimentation tank has the main function of solid-liquid separation. The secondary sedimentation tank comprises the following equipment: a secondary sedimentation tank mud scraper, a reflux pump and a mud pump. However, unlike the traditional complicated process operation method of measuring the sludge amount and reflux ratio of the biochemical tank, the two-stage sludge-water full-separation device is arranged at the tail end of the biochemical tank, so that the full reflux or full discharge operation of the activated sludge can be realized only according to the actual process operation requirement and the requirement of whether the sludge amount of the biochemical tank is sufficient or not. The full reflux of the secondary sedimentation tank refers to that the sludge is totally refluxed to the first-stage anoxic tank and the second-stage anoxic tank; the full discharge means that the sludge is completely discharged to a sludge concentration tank. The method is simple, convenient and flexible to operate and obvious in effect according to actual operation conditions.
In the advanced treatment unit, the vertical sheet fiber filter is used for further intercepting suspended matters in the effluent of the secondary sedimentation tank, so that the water body is clearer and more transparent.
In the advanced treatment unit, the ozone strong oxidation device carries out aeration treatment on organic matters which are difficult to remove and degrade in the biochemical stage, and the COD in the water body is further reduced by utilizing the strong oxidation property of the ozone.
In the advanced treatment unit, the clean water tank is used as the outlet water of the ozone strong oxidation device for staying, and the outlet water of the clean water tank can be used as the reuse water and the washing water for supplementing water for the power plant. The equipment of the clean water pond comprises: a clean water tank lift pump.
The sludge reduction unit comprises a sludge concentration tank and a sludge reduction device, and has the main function of solid-liquid separation. Activated sludge generated by the flushing high-efficiency precipitation device, the dissolved air floatation device and the biochemical unit is collected, concentrated and dehydrated, so that the reduction process of the sludge is realized, sludge discharged from the dehydrator is in a semi-fluidization state, and can be pumped to a sludge bin through a screw rod for drying treatment. The matched equipment of the sludge concentration tank comprises: a sludge thickener, a sludge pump and a sludge reduction device. And a synchronous interlocking start-stop design is carried out between the sludge pump of the sludge concentration tank and the sludge reduction device.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the invention realizes the full-flow treatment of the sludge drying wastewater by adopting a unit-dividing, grading and quality-dividing method. According to the difference of water quality, the wastewater is respectively collected, so that cross contamination is avoided, and the treatment difficulty is reduced;
2. according to the characteristics of water pollutants, the treatment process is comprehensively applied and effectively combined; the characteristic contaminants are removed correspondingly in the corresponding process.
3. The sludge generated by the system can realize internal circulation treatment, and the characteristic of sludge reduction is embodied.
The full-flow system with unit division, grading and quality division can effectively reduce the treatment load, reduce the treatment cost, has good effluent quality, and can be effectively recycled and circularly supplemented with water.
Drawings
FIG. 1 is a flow chart of a wastewater treatment process according to a first embodiment of the present invention.
Fig. 2 (a) is a schematic structural diagram of a high-efficiency precipitation apparatus according to an embodiment of the present invention, in which 1 is the high-efficiency precipitation apparatus, 2 is a mixing tank stirrer, 3 is a flocculation stirrer (variable frequency), 4 is a draft tube, 5 is a water collection tank of the high-efficiency precipitation apparatus, and 6 is an inclined plate of the high-efficiency precipitation apparatus.
FIG. 3 is a schematic structural diagram of a two-stage biochemical pool according to a first embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments:
the first embodiment is as follows:
referring to fig. 1, a sludge coupling power generation drying wastewater full-flow treatment system comprises the following units:
and arranging an acid-base wastewater storage unit for collecting acid-base cleaning wastewater of the drying condenser.
The device is provided with a washing wastewater collecting unit, collects high-efficiency dust remover washing water discharge and ground washing water, the water contains high-concentration suspended matters, the high-efficiency washing precipitation device is utilized to treat the water, and the effluent flows to a washing water tank to be used as subsequent recycling.
Setting a pretreatment unit; the adjusting water tank is mainly used for collecting waste gas condensate, cooling tower sewage and acid-base waste water from the storage tank. The incoming water is mixed in the regulating water tank, and simultaneously, oil stain and suspended matters in the incoming water are reduced by adopting dissolved air flotation.
Setting a biochemical unit; firstly, the biodegradability of water quality is improved by pretreatment through a hydrolysis acidification tank, then ammonia nitrogen and total nitrogen in a water body are removed by utilizing a multi-stage A/O process, and the process comprises nitrifying liquid reflux and high-activity sludge reflux.
Setting a depth processing unit; and (3) further treating pollutants in the water body, wherein the effluent of the biochemical unit firstly flows to the vertical sheet fiber filter to further remove suspended matters in the water body, and the effluent of the filter enters an ozone strong oxidation device for aeration treatment to strengthen the removal of COD. The water discharged by the ozone strong oxidation device stays in a clean water tank and can be used as the recycled water and the washing water of a power plant for water supplement.
Setting a sludge reduction unit; the device comprises a sludge concentration tank and a sludge reduction device, wherein the sludge reduction device comprises a sludge feeding pump, a deslimer, a screw conveying pump and other equipment; the sludge reduction system is mainly used for collecting, concentrating and dehydrating activated sludge generated by flushing the efficient precipitation device, the dissolved air flotation device and the biochemical unit, so that the reduction process of the sludge is realized, and sludge discharged from the desliming machine can be pumped to a sludge bin through a screw rod for drying treatment.
In the flushing wastewater collection unit, the flushing high-efficiency precipitation device is provided with a mixing zone, a flocculation zone and a precipitation zone, and coagulant aid are added into the wastewater to enable suspended matters in the wastewater to form larger colloidal particles, so that SS and non-dissolved COD in the wastewater are reduced. Wherein, the mixing zone and the flocculation zone are respectively provided with a stirrer, the sedimentation zone is provided with a reflux pump and a sludge discharge pump, the inlet end of the reflux pump is connected with a sludge outlet pipe at the bottom of a cone hopper of the sedimentation zone, and the outlet end of the reflux pump extends into a guide cylinder of the flocculation zone; the inlet end of the sludge pump is connected with a sludge outlet pipe at the bottom of the conical hopper of the settling zone, and the outlet end of the sludge pump is connected with a sludge inlet pipe of the sludge concentration tank. According to the main design parameters of water quality: reaction time in the mixing zone: 5-10 min, reaction time of a flocculation zone: 15-30 min, surface load of a precipitation zone: 0.6 to 2.0m3/(m2H). In the running process of the system, the sludge reflux pump is always in a starting state, and the sludge discharge pump discharges sludge regularly. The sludge reflux pump and the sludge discharge pump can be switched to use through a communicating valve between the sludge reflux pump and the sludge discharge pump. The mixing of the coagulant and the raw water adopts a paddle type stirrer, so that the ideal coagulation effect is achieved. Coagulation time andthe velocity gradient is within a suitable range and maintained for a suitable contact time. The flocculation tank adopts a paddle type stirrer. The flocculated raw water passes through the reaction zone at a suitable flow rate and then enters the precipitation zone. The flocculation tank is provided with various hydraulic accessories to optimize the flocculation effect.
In the washing wastewater collection unit, the washing water tank mainly collects and washes the effluent of the high-efficiency precipitation device for recycling. The wash basin kit is equipped with a wash basin lift pump. According to the main design parameters of water quality: residence time: 6-12 h.
The adjusting water tank is mainly used for collecting waste gas condensate, cooling tower sewage and acid-base waste water from the storage tank, mixing the waste gas condensate, the cooling tower sewage and the acid-base waste water, and can ensure continuous water inlet of subsequent processes. According to the main design parameters of water quality: residence time: 12-24 h.
In the pretreatment unit, the dissolved air flotation device mainly utilizes the air flotation principle, and bubbles are attached to the surfaces of fine particles by aerating in water, so that the particle density is reduced, and oil stains and fine particles are quickly removed. According to the main design parameters of water quality: dissolved gas water amount: 2 to 3m3H; contact area contact time: 3-7 min; separation zone residence time: 20-40 min.
In the biochemical unit, the effluent of the hydrolysis acidification tank flows into a section of anoxic tank through a tank wall hole and mainly used for denitrification and removal of a small amount of organic matters. In addition, the first-stage anoxic tank also receives return sludge of the secondary sedimentation tank and nitrified return liquid of the first-stage aerobic tank. According to the main design parameters of water quality: design temperature: 30 ℃, residence time: 20h, sludge concentration: 3000 mg/L. Supporting instruments and main control parameters: ORP appearance: -300 to 100 mV.
In the biochemical unit, a section of aerobic tank is mainly used for removing organic matters and converting ammonia nitrogen into nitrate nitrogen through nitration reaction. And part of the effluent of the first section of the aerobic tank flows back to the first section of the anoxic tank. According to the main design parameters of water quality: design temperature: 30 ℃, residence time: 55-60 h, sludge concentration: 3000mg/L, BOD5 load: 0.075Kg/(KgMLSS d), ammonia nitrogen load: 0.032Kg/(KgMLSS d). Supporting instruments and main control parameters: and (4) a DO instrument: 2-3 mg/L, pH meter: 6.5 to 8.
In the biochemical unit, the two-section anoxic tank is mainly used for further denitrification and removal of a small amount of organic matters. According to the main design parameters of water quality: design temperature: 30 ℃, residence time: 7.26h, sludge concentration: 3000 mg/L. Supporting instruments and main control parameters: ORP appearance: -300 to 100 mV.
In the biochemical unit, the two-stage aerobic tank is mainly used for removing organic matters and converting ammonia nitrogen into nitrate nitrogen through nitration reaction. According to the main design parameters of water quality: design temperature: 30 ℃, residence time: 14-16 h, sludge concentration: 3000 mg/L. Supporting instruments and main control parameters: and (4) a DO instrument: 2-3 mg/L.
In the biochemical unit, the secondary sedimentation tank is mainly used for realizing sludge-water separation. The sludge outlet pipeline of the secondary sedimentation tank is divided into three directions which respectively reach the first-section anoxic tank, the second-section anoxic tank and the sludge concentration tank, and an automatic valve is arranged on the pipeline. However, in the process, the flow direction of the sludge has uniqueness, so that the simplicity and convenience of calculation and operation are brought, and the opening and closing of the reflux pump and the sludge discharge pump can be simply judged by simply measuring and calculating the existing sludge amount in the biochemical tank. According to the main design parameters of water quality: design temperature: 30 ℃, surface load: 1.44m3/(m2H), settling time: 4-6 h.
In the advanced treatment unit, the vertical sheet fiber filter is used for further intercepting suspended matters in the effluent of the secondary sedimentation tank, so that the water body is clearer and more transparent. According to the main design parameters of water quality: the quality of inlet water meets the conditions that SS is less than or equal to 30mg/L, pH is as follows: 6-9.
Among the advanced treatment unit, the ozone strong oxidation device carries out aeration treatment to the difficult organic matter that gets rid of, difficult degradation in the biochemical stage, utilizes the strong oxidizing property of ozone, further reduces the COD in the water. According to the main design parameters of water quality: residence time: and (4) 1 h.
In the advanced treatment unit, a clean water tank is used as the outlet water of the ozone strong oxidation device for staying, and the outlet water of the clean water tank can be used as the reuse water and the washing water for supplementing water of a power plant. The equipment of the clean water pond comprises: a clean water tank lift pump. According to the main design parameters of water quality: residence time: and 8 h.
The sewageIn the sludge decrement unit, a sludge concentration tank receives and washes sludge discharged by a sludge discharge pump of the high-efficiency sedimentation device, the dissolved air flotation device, the hydrolysis acidification tank and the secondary sedimentation tank, and the sludge concentration tank has the main function of solid-liquid separation. And the effluent of the sludge concentration tank enters a sludge bin. According to the main design parameters of water quality: surface loading: 0.56m3/(m2H). And in the operation process of the system, the sludge pump of the sludge concentration tank discharges sludge regularly. And a synchronous interlocking start-stop design is carried out between the sludge pump of the sludge concentration tank and the sludge reduction device.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A sludge coupling power generation drying wastewater full-flow treatment system is characterized by comprising a first wastewater collection unit for collecting flushing drainage of a high-efficiency dust remover and ground flushing water, and a second wastewater collection unit for collecting waste gas condensate, cooling tower sewage and drying condenser acid-base cleaning wastewater; the sewage treatment system also comprises a first wastewater treatment unit, a second wastewater treatment unit and a sludge reduction unit, wherein the first wastewater treatment unit and the second wastewater treatment unit are respectively connected with the first wastewater collection unit and the second wastewater collection unit; the sludge discharge ports of the first wastewater treatment unit and the second wastewater treatment unit are respectively connected with a sludge reduction unit.
2. The sludge coupling power generation drying wastewater full-flow treatment system of claim 1, wherein the first wastewater collection unit comprises a high-efficiency precipitation device and a flushing water tank, and a water inlet, a water outlet and a sludge discharge port of the high-efficiency precipitation device are respectively connected with the first wastewater collection unit, the flushing water tank and the sludge reduction unit; the high-efficiency sedimentation device comprises a mixing area, a flocculation area and a sedimentation area which are sequentially connected, wherein the mixing area and the flocculation area are respectively provided with a stirrer, and the sedimentation area is provided with a reflux pump and a sludge discharge pump.
3. The sludge coupling power generation drying wastewater full-flow treatment system of claim 2, wherein the second wastewater treatment unit comprises a pretreatment unit, a biochemical unit and a deep treatment unit which are connected in sequence; the pretreatment unit is connected with the second wastewater collection unit; the water outlet of the advanced treatment unit is connected with a washing water tank; the sludge discharge ports of the pretreatment unit and the biochemical unit are respectively connected with a sludge reduction unit.
4. The sludge-coupled power-generation-drying wastewater full-flow treatment system of claim 3, wherein the pretreatment unit comprises a dissolved air floatation device for reducing oil contamination and suspended matters in the incoming water.
5. The system for the full-flow treatment of the sludge-coupled power-generation dried wastewater according to claim 3, wherein the biochemical unit comprises a hydrolysis acidification tank, two sections of biochemical tanks and a secondary sedimentation tank; the two sections of biochemical tanks comprise a first section anoxic tank, a second section anoxic tank, a first section aerobic tank and a second section aerobic tank; the water outlet of the hydrolysis acidification tank is connected with a section of anoxic tank.
6. The system of claim 5, wherein the sludge discharge port of the secondary sedimentation tank is connected to the first anoxic tank, the second anoxic tank and the sludge concentration tank.
7. The sludge coupling power generation drying wastewater full-flow treatment system of claim 5, wherein the advanced treatment unit comprises a filtering device, an advanced treatment device and a clean water tank which are connected in sequence; the filtering device is connected with the secondary sedimentation tank, and the clean water tank is connected with the flushing water tank.
8. The system of claim 7, wherein the filter is a vertical fiber filter and the advanced treatment device is an ozone strong oxidation device.
9. The system of claim 1, wherein the sludge reduction unit comprises a sludge concentration tank and a sludge reduction device.
10. A full-flow treatment method for sludge coupling power generation drying wastewater is characterized by comprising the following steps:
step 1: respectively collecting the wastewater according to the water quality difference of the wastewater generated in the sludge drying process;
step 2: carrying out sedimentation treatment on the high-efficiency deduster washing drainage water and the ground washing water, and recycling the outlet water as washing water;
and step 3: mixing the dry condenser acid-base cleaning wastewater, the waste gas condensate, the cooling tower blowdown water and the dry condenser acid-base cleaning wastewater, firstly carrying out pretreatment to reduce oil stains and suspended matters in the wastewater, and then carrying out biochemical treatment;
and 4, step 4: carrying out advanced treatment on the biochemical effluent to enhance the removal of COD in the sewage;
and 5: sludge reduction treatment is carried out on sludge generated in the processes of precipitation treatment, pretreatment and biochemical treatment;
step 6: and taking the outlet water after the advanced treatment as the recycled water of the power plant and the water supplement of washing water.
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