CN218709734U - Industrial gathering area comprehensive sewage treatment system - Google Patents

Abstract

The utility model relates to an industrial gathering area comprehensive sewage treatment system, which comprises an integrated lifting pump station, an adjusting tank, a front flocculation sedimentation tank, an anoxic tank, a biological contact oxidation tank, a secondary sedimentation tank, a first middle tank, a Fenton oxidation device, a rear flocculation sedimentation tank, a second middle tank, an aeration biological filter tank, a clean water tank, a cloth filter tank and an ultraviolet disinfection tank which are connected in sequence, wherein a sludge return pipeline connected with the anoxic tank and the biological contact oxidation tank is arranged in the secondary sedimentation tank, and a nitrification liquid return pipeline connected with the anoxic tank is arranged in the biological contact oxidation tank; a backwashing pipeline and an overproof sewage return pipeline are arranged in the clean water tank; the device also comprises a sludge concentration tank, a membrane filter press, a sludge dryer, a first dosing system, a second dosing system and a third dosing system, wherein the sludge concentration tank is connected with the front coagulation sedimentation tank, the second sedimentation tank and the rear coagulation sedimentation tank. The system has reasonable structural design, can effectively purify and treat the industrial integrated sewage in the industrial aggregation area, can reach the discharge standard after the industrial integrated sewage is treated, and prevents the environmental pollution.

Description

Industrial gathering area comprehensive sewage treatment system

Technical Field

The utility model relates to a sewage treatment field, concretely relates to sewage treatment system is synthesized in industry gathering area.

Background

The sewage of a common industrial gathering area mainly takes gathered industrial wastewater as a main part and simultaneously contains scattered small amount of domestic sewage, and the water quality is characterized in that:

(1) COD in comprehensive wastewater _cr High and general biodegradability;

(2) CODcr in the industrial wastewater mainly comes from pretreated substances of various enterprises;

(3) The waste water contains phosphate;

(4) The sewage contains oil substances with certain concentration;

(5) The fluctuation of the quality and the quantity of the sewage is large.

If the sewage in the industrial gathering area directly enters a river without being treated, the sewage can have serious influence on soil, plants and water bodies, and the serious influence is mainly reflected in the following aspects:

(1) The industrial wastewater directly flows into channels, rivers and lakes pollute surface water, and the toxicity is high, so that aquatic animals and plants die and even are killed;

(2) The industrial wastewater can also permeate into underground water to pollute the underground water and further pollute crops;

(3) If the polluted surface water or underground water is adopted as domestic water by surrounding residents, the polluted surface water or the polluted underground water can cause harm to the body and cause death of serious people;

(4) The industrial wastewater permeates into the soil, causing soil pollution. Affecting the growth of plants and soil microorganisms;

(5) Some industrial wastewater has odor and pollutes air;

(6) The ingestion and absorption of animals and plants, and the harm to human body after toxic and harmful substances in the industrial wastewater enter the human body through food chain.

Therefore, the sewage in the industrial gathering area can be discharged after being purified.

Disclosure of Invention

In order to realize that the industry gathers the up-to-standard emission of district comprehensive sewage, the utility model provides an industry gathers district comprehensive sewage treatment system, system structural design is reasonable, and the treatment effeciency is high, and the industry gathers district comprehensive sewage and can reach national emission standard after handling.

Therefore, the utility model adopts the technical proposal that: an industrial gathering area comprehensive sewage treatment system comprises an integrated lifting pump station, an adjusting tank, a front flocculation sedimentation tank, an anoxic tank, a biological contact oxidation tank, a secondary sedimentation tank, a first intermediate water tank, a Fenton oxidation device, a rear flocculation sedimentation tank, a second intermediate water tank, a biological aerated filter, a clean water tank, a cloth filter, an ultraviolet disinfection tank, a sludge concentration tank, a membrane filter press, a sludge dryer and a dosing system; wherein:

the comprehensive sewage of the industrial gathering area is connected with a water inlet of an integrated lifting pump station through a sewage pipe network, a water outlet of the integrated lifting pump station is connected with an adjusting tank, a water outlet of the adjusting tank is connected with a water inlet of a front coagulation sedimentation tank, a water outlet of the front coagulation sedimentation tank is connected with a water inlet of an anoxic tank, a water outlet of the anoxic tank is connected with a biological contact oxidation tank, a water outlet of the biological contact oxidation tank is connected with a water inlet of a secondary sedimentation tank, a water outlet of the secondary sedimentation tank is connected with a water inlet of a first intermediate tank, a water outlet of the first intermediate tank is connected with a water inlet of a Fenton oxidation device, a water outlet of the Fenton oxidation device is connected with a water inlet of a secondary flocculation sedimentation tank, a water outlet of the secondary flocculation sedimentation tank is connected with a water inlet of a second intermediate tank, a water outlet of the secondary aeration tank is connected with a water inlet of a biological aerated filter, a water outlet of the biological aerated filter is connected with a water inlet of a filter cloth filter tank, a water outlet of a filter cloth filter is connected with a water inlet of an ultraviolet disinfection tank, and the ultraviolet disinfection tank discharges water into a nearby natural water body or city pipe network after reaching the standard;

a sludge return pipeline connected with the anoxic tank and the biological contact oxidation tank respectively is arranged in the secondary sedimentation tank, and a nitrification liquid return pipeline connected with the anoxic tank is arranged in the biological contact oxidation tank;

a backwashing pipeline communicated with the biological aerated filter is arranged in the clean water tank, a backwashing loop communicated with the regulating tank is arranged in the biological aerated filter, and an overproof sewage return pipeline connected with the regulating tank is also arranged in the clean water tank;

the bottoms of the front coagulation sedimentation tank, the secondary sedimentation tank and the rear coagulation sedimentation tank are respectively provided with a pipeline which is connected with a sludge concentration tank and is used for discharging precipitated sludge, the sludge concentration tank is connected with a membrane filter press, and a filtrate outlet pipeline of the membrane filter press is connected with an adjusting tank; the dosing system comprises a first dosing system connected with the front flocculation deep sedimentation, a second dosing system connected with the Fenton oxidation device and a third dosing system connected with the rear flocculation sedimentation.

Furthermore, a crushing grid machine and a lifting water pump are arranged in the integrated lifting pump station. The crushing grating machine automatically runs, larger garbage in water is crushed, a lifting pump can be prevented from being blocked, the cleaning frequency is reduced, the labor intensity is reduced, and the working efficiency is improved.

Furthermore, a lifting pump and an air stirring system are arranged in the adjusting tank, the middle water tank I and the middle water tank II. A lifting pump in the regulating tank is used for lifting the regulated sewage to enter the front coagulative precipitation tank through a water outlet pipe, and air stirring is used for quickly mixing the incoming water, so that the effect of homogenizing and uniform quantity of the regulating tank is exerted; the lifting pump in the middle water tank I is used for lifting the sewage in the middle water tank I into the Fenton oxidation device through the water outlet pipe, and the air stirring system is used for uniformly mixing the sewage in the middle water tank I; and the lifting pump in the middle water tank II is used for lifting the sewage in the middle water tank II into the biological aerated filter through the water outlet pipe, and the air stirring system is used for uniformly mixing the sewage in the middle water tank II.

Further, the first dosing system comprises a container and a pipeline which are used for adding calcium oxide, sodium hydroxide, PAC polyaluminium chloride and PAM polyacrylamide respectively, when the system is used, calcium oxide (CaO) and sodium hydroxide (NaOH) are added to adjust the wastewater to be alkalescent, then PAC (flocculating agent) and PAM (coagulant aid) are added to carry out flocculation reaction on the sewage, and suspended matters in the sewage are removed;

the second dosing system comprises a container and a pipeline which are used for respectively dosing sulfuric acid, hydrogen peroxide and ferrous sulfate, and when the device is used, the nondegradable organic pollutants in the sewage can be quickly oxidized by the strong oxidized hydroxyl free radicals generated by the second dosing system, and the biodegradability of the sewage is improved;

the third dosing system comprises a container and a pipeline which are respectively used for adding calcium oxide, sodium hydroxide, activated carbon, PAC (polyaluminium chloride) and PAM (polyacrylamide), when the system is used, calcium oxide (CaO) and sodium hydroxide (NaOH) are added to adjust the wastewater to be alkalescent, then activated carbon, PAC (polyaluminium chloride) (flocculant) and PAM (coagulant aid) are added to carry out flocculation reaction on the wastewater, and suspended matters in the wastewater are removed.

Furthermore, a submersible water impeller and an oxygen dissolving instrument for detecting the oxygen content in the anoxic tank are arranged in the anoxic tank. Mix the stirring to coming water through dive impeller, maintain the oxygen deficiency environment in the oxygen deficiency pond simultaneously, dissolved oxygen appearance continuously detects the interior dissolved oxygen condition of pond.

Furthermore, an aeration device, a frame-type biological filler, a plant filler and an oxygen dissolving instrument for detecting the oxygen content in the tank are arranged in the biological contact oxidation tank. The frame-type biological filler is selected as a carrier of aerobic microorganisms, so that the number of the microorganisms can be greatly increased, and the treatment efficiency of wastewater is improved.

Furthermore, a ceramsite filler is arranged in the biological aerated filter. The ceramsite filler is used as a carrier of microorganisms, so that the number of the microorganisms is greatly increased, the treatment efficiency of wastewater is improved, and a physical filtering effect is achieved to remove a part of suspended matters in the sewage.

Furthermore, a lifting pump is arranged on a backwashing pipeline and a standard-exceeding sewage return pipeline in the clean water tank. The lift pump can be used for carrying out periodic backwashing on the biological aerated filter and simultaneously returning overproof sewage to the regulating tank for circular treatment.

Furthermore, a cloth filter, a cleaning device and a mud discharging device are arranged in the cloth filter, and the cloth filter is cleaned by flushing by a lifting pump, so that suspended matters intercepted by the cloth filter can be automatically cleaned and discharged, the manual cleaning frequency of the cloth filter is reduced, the labor intensity is reduced, and the working efficiency is improved.

Has the advantages that:

the treatment system has reasonable structural design and easy control, can effectively treat the comprehensive sewage generated in the industrial gathering area, can reach the national discharge standard after treatment, and prevents the pollution to the surrounding environment.

Drawings

Fig. 1 is a structural layout diagram of the present invention.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, but the embodiment should not be construed as limiting the present invention.

The utility model discloses as shown in figure 1:

the utility model provides an industrial gathering district synthesizes sewage treatment system, includes that integration promotes pump station 1, equalizing basin 2, preceding flocculation and precipitation pond 3, oxygen deficiency pond 4, biological contact oxidation pond 5, two heavy ponds 6, middle pond 7, fenton oxidation unit 8, back flocculation and precipitation pond 9, middle pond two 10, aeration biological filter 11, clean water basin 12, filter cloth filter 13, ultraviolet disinfection pond 14, sludge thickening pond 15, membrane filter press 16, sludge drying machine 17, wherein:

the comprehensive sewage in the industrial gathering area is conveyed to the integrated lifting pump station 1 through a pipe network, a crushing grid is arranged in the integrated lifting pump station, garbage with larger incoming water can be crushed, the blockage of a lifting pump is avoided, the cleaning frequency of the lifting pump is reduced, and the lifting pump lifts the sewage in the pump station and then enters the regulating tank 2 through a water outlet pipe;

a lifting pump and an air stirring system are arranged in the adjusting tank 2, the air stirring system quickly homogenizes and homogenizes the sewage in the adjusting tank, and the lifting pump lifts the sewage in the adjusting tank to enter the front flocculation sedimentation tank 3 through a drain pipe;

the waste water is adjusted to be alkalescent by adding calcium oxide and sodium hydroxide in the front flocculation sedimentation tank 3, then PAC polyaluminium chloride and PAM polyacrylamide are added, and fine particles are pulled together by the adsorption and bridging action of a flocculating agent and the adsorption action of charged groups on a polymer chain, so that the effect of accelerating the sedimentation of pollutants in the sewage is realized; standing the fully reacted sewage in a front flocculation sedimentation tank for sedimentation and layering, sinking the flocculated large-particle sludge to a bottom sludge hopper under the action of gravity, discharging the sludge to a sludge concentration tank 15 through a sludge discharge valve of the front flocculation sedimentation tank, and feeding upper clear water into an anoxic tank 4 through a drain pipe;

the sewage enters the anoxic tank 4, and denitrification reaction is carried out under an anoxic environment to carry out nitrogen and phosphorus removal on the sewage and improve the biodegradability of the sewage at the same time;

the water outlet of the anoxic tank 4 is connected with the biological contact oxidation tank 5, aerobic microorganisms are utilized to carry out biological metabolism in the biological contact oxidation tank 5 under the condition of existence of oxygen so as to degrade organic matters in the sewage, meanwhile, frame type biological filler is arranged in the contact oxidation tank, the number of the aerobic microorganisms is greatly increased, after the sewage in the biological contact oxidation tank is subjected to nitration reaction, a part of the sewage enters the anoxic tank 4 through a nitration liquid backflow pipeline, and a part of the sewage is discharged into the secondary sedimentation tank 6 through an overflow weir;

the sewage passing through the biochemical system is subjected to solid-liquid separation in a secondary sedimentation tank 6, a part of sludge at the bottom of the secondary sedimentation tank 6 enters an anoxic tank 4 and a biological contact oxidation tank 5 through a sludge reflux pump to continuously participate in biochemical reaction, the other part of residual sludge enters a sludge concentration tank 15 through a sludge discharge pipeline, the supernatant of the secondary sedimentation tank 6 enters an intermediate water tank I7, and the sewage is lifted to a Fenton oxidation device 8 through a lifting pump arranged in the intermediate water tank I7 after being uniformly mixed;

the sewage is oxidized by a large amount of strongly oxidized hydroxyl radicals generated by the Fenton reaction in the Fenton oxidation device 8 to oxidize the high molecular pollutants which are difficult to degrade in the sewage, thereby providing precondition for the microbial growth of a subsequent biochemical system;

the water outlet of the Fenton oxidation device 8 is connected with a post-flocculation sedimentation tank 9, calcium oxide and sodium hydroxide are added into the post-flocculation sedimentation tank 9 to adjust waste water to be alkalescent, then activated carbon, PAC polyaluminium chloride and PAM polyacrylamide are added, fine particles are pulled together through adsorption and bridging of a flocculating agent and adsorption of charged groups on a macromolecular chain, so that accelerated sedimentation of pollutants in the sewage is realized, the sewage after full reaction is kept stand in the sedimentation tank for sedimentation and layering, large granular sludge flocculated together is sunk to a bottom sludge hopper under the action of gravity, then the sludge is discharged to a sludge concentration tank 15 through a sludge discharge valve of the sedimentation tank, and upper clear water enters a second intermediate water tank 10 through a water discharge pipe;

after the sewage is uniformly mixed in the middle water tank II 10, the sewage is lifted to the biological aerated filter 11 by a lifting pump arranged in the middle water tank II;

the sewage enters an aeration biological filter 11, and ceramsite filler with the specific surface area of 1-1.5m2/kg is filled in the aeration biological filter to provide a carrier for microbial film growth. Sewage flows through the filter material layer from bottom to top, air is blown and aerated at the lower part of the filter material layer, so that air is contacted with the sewage in the same direction, organic pollutants in the sewage and a biological film on the surface of the filler are degraded through biochemical reaction, and the filler plays a role in physical filtration. When the biological aerated filter operates to a certain degree, the microbial film which is thickened on the filter material falls off, and the effluent water has a part of the fallen microbial film, so that the effluent water quality is deteriorated, at the moment, the biological aerated filter needs to be backwashed, the backwashing water of the biological aerated filter enters the regulating tank for continuous treatment, and the normal filtered water of the biological aerated filter enters the clean water tank 12;

the sewage reaching the standard in the clean water tank 12 enters a cloth filter 13 for further treatment, and the sewage exceeding the standard flows back to an adjusting tank through a reflux pump in the clean water tank for circular treatment;

the cloth-filtering pool 13 comprises a cloth-filtering filter, a cleaning device and a mud discharging device, after sewage enters the cloth-filtering pool, a rotary disc of the cloth-filtering filter is in a static state during filtering, along with accumulation of sludge on the cloth-filtering filter, when the water level in the filter rises and reaches a set water level, a cleaning process is started, the rotary disc rotates at a rotating speed of 0.5r/min, a suction pump sucks the surface of the cloth-filtering filter at a negative pressure at the same time to suck away sludge particles accumulated on the outer surface of the cloth-filtering filter, water in the rotary disc of the cloth-filtering filter is sucked at the same time, the water cleans the cloth-filtering filter from inside to outside and discharges cleaning water, and filtered water of the cloth-filtering pool 13 enters the ultraviolet disinfection pool 14;

the ultraviolet disinfection tank is provided with an ultraviolet disinfection device (an ultraviolet lamp tube) and an auxiliary system (an automatic water level controller, an ultraviolet lamp tube cleaning system and the like), after sewage enters the ultraviolet disinfection tank, the ultraviolet-C wave band (namely a sterilization wave band with the wavelength of 180 nm-380 nm) is utilized to destroy DNA structures of various viruses, bacteria and other pathogenic organisms in the water body, so that the viruses, the bacteria and the DNA structures can not propagate by themselves, and the purpose of removing the pathogenic organisms in the water is achieved;

the sewage disinfected by ultraviolet rays is discharged into a nearby natural water body or an urban pipe network after reaching the sewage discharge standard;

the bottom of the front coagulation sedimentation tank 3, the bottom of the secondary sedimentation tank 6 and the bottom of the rear coagulation sedimentation tank 9 are provided with pipelines which are connected with a sludge concentration tank 15 and used for discharging sludge in the sedimentation tank, the concentrated sludge in the sludge concentration tank 15 is pumped into a membrane filter press 16 through a sludge pump for filter pressing, a filtered water outlet pipe of the membrane filter press reflows to an adjusting tank 2 for secondary treatment, the sludge which is subjected to filter pressing through the membrane filter press enters a sludge dryer 17, and the water content can be reduced to below 60% after low-temperature drying.

The following detection example that adopts of verification case the processing system go on to the outer drainage after the comprehensive sewage treatment of industrial aggregation area, what the example was selected is that the outer drainage that a certain industrial aggregation area of Hubei province comprehensive sewage treatment plant built the trial run (processing technology is in secret state), this monitoring method of monitoring project, the method source, use the instrument and detect out the limit and see table 1 below:

table 1: monitoring method, method basis, instrument and detection limit

Use above-mentioned monitoring methods, monitor the drainage after using this utility model's the comprehensive sewage treatment of industry gathering district, go out the water index and be far less than the national standard shown in following table 2, explain the utility model discloses a sewage treatment scheme is synthesized to industry gathering district has good adaptability to the comprehensive sewage treatment of industry gathering district, and the play water through handling accords with national emission standard.

Those skilled in the art will appreciate that the details of the present invention are not described in detail herein.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (9)

1. The utility model provides a sewage treatment system is synthesized in industry gathering area which characterized in that: the device comprises an integrated lifting pump station, an adjusting tank, a front flocculation sedimentation tank, an anoxic tank, a biological contact oxidation tank, a secondary sedimentation tank, a first middle tank, a Fenton oxidation device, a rear flocculation sedimentation tank, a second middle tank, a biological aerated filter, a clean water tank, a cloth filter and an ultraviolet disinfection tank which are connected in sequence, wherein a water outlet of the ultraviolet disinfection tank is connected with a natural water body or an urban pipe network;

a sludge return pipeline connected with the anoxic tank and the biological contact oxidation tank respectively is arranged in the secondary sedimentation tank, and a nitrification liquid return pipeline connected with the anoxic tank is arranged in the biological contact oxidation tank;

a backwashing pipeline communicated with the biological aerated filter is arranged in the clean water tank, a backwashing loop communicated with the regulating tank is arranged in the biological aerated filter, and a standard-exceeding sewage return pipeline connected with the regulating tank is also arranged in the clean water tank;

the sludge treatment system is characterized by also comprising a sludge concentration tank, a membrane filter press and a sludge dryer, wherein pipelines connected with the sludge concentration tank and used for discharging precipitated sludge are arranged at the bottoms of the front flocculation sedimentation tank, the secondary sedimentation tank and the rear flocculation sedimentation tank respectively, the sludge concentration tank is connected with the membrane filter press, and a filtrate outlet pipeline of the membrane filter press is connected with the adjusting tank;

the system also comprises a first dosing system connected with the front flocculation deep sedimentation, a second dosing system connected with the Fenton oxidation device and a third dosing system connected with the rear flocculation sedimentation.

2. The integrated sewage treatment system of the industrial gathering area as set forth in claim 1, wherein: and a crushing grid machine and a lifting water pump are arranged in the integrated lifting pump station.

3. The integrated sewage treatment system of the industrial gathering area as set forth in claim 1, wherein: and a lifting pump and an air stirring system are arranged in the adjusting tank, the middle water tank I and the middle water tank II.

4. The integrated sewage treatment system of industrial concentration area as claimed in claim 1, 2 or 3, wherein: the first dosing system comprises a container and a pipeline which are respectively used for dosing calcium oxide, sodium hydroxide, PAC (polyaluminium chloride) and PAM (polyacrylamide); the second dosing system comprises a container and a pipeline which are used for respectively dosing sulfuric acid, hydrogen peroxide and ferrous sulfate; the third dosing system comprises a container and a pipeline which are respectively used for dosing calcium oxide, sodium hydroxide, activated carbon, PAC (polyaluminium chloride) and PAM (polyacrylamide).

5. The integrated sewage treatment system for the industrial gathering area as recited in claim 4, wherein: the oxygen deficiency tank is internally provided with a submersible water impeller and an oxygen dissolving instrument for detecting the oxygen content in the tank.

6. The integrated sewage treatment system of industrial concentration area as claimed in claim 1, 2, 3 or 5, wherein: an aeration device, a frame type biological filler, a plant filler and an oxygen dissolving instrument for detecting the oxygen content in the tank are arranged in the biological contact oxidation tank.

7. The integrated sewage treatment system of the industrial gathering area as set forth in claim 6, wherein: and ceramsite filler is arranged in the biological aerated filter.

8. The integrated sewage treatment system of the industrial gathering area as set forth in claim 7, wherein: and a lifting pump is arranged on a backwashing pipeline and a standard-exceeding sewage return pipeline in the clean water tank.

9. The integrated sewage treatment system for industrial concentration areas as claimed in claim 1, 2, 3, 5, 7 or 8, wherein: and a cloth filter, a cleaning device and a mud discharging device are arranged in the cloth filter.

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