CN209537234U - A comprehensive industrial wastewater treatment system - Google Patents

Abstract

The utility model relates to a kind of integrated industrial waste water treatment systems, including pretreatment unit, hydrolytic tank, the perseverance pond water level SBR, filtering collecting-tank, ozone oxidation and the destruction pond, biological aerated filter, sterilization pool being sequentially connected.Pretreatment unit includes at least: grille well, collecting-tank, lift pump room, setting pot, conditioning tank, accident pool, coagulation floatation, wherein, grille well, collecting-tank, lift pump room, setting pot successively join end to end, the water outlet of setting pot passes through the water inlet of the first electrically operated valve and the second electrically operated valve connection accident pool and the first water inlet of conditioning tank respectively, second water inlet of the water outlet connection conditioning tank of accident pool, the water outlet of conditioning tank connects coagulation floatation, and the water outlet of coagulation floatation connects hydrolytic tank.The utility model is simple using " pretreatment+perseverance water level SBR+ ozone oxidation+biological aerated filter " process flow, and applicability is wide, and at low cost high-efficient, is the integrated industrial waste water treatment system being worthy to be popularized.

Description

A comprehensive industrial wastewater treatment system

technical field

The utility model relates to the field of water treatment, in particular to a comprehensive industrial wastewater treatment system.

Background technique

With the continuous increase of the number of industrial parks in our country, the corresponding park environmental pollution issues are increasingly concerned by the society, and comprehensive industrial wastewater as an important part of it has become the focus of attention.

Industrial wastewater is one of the important causes of environmental pollution, especially water pollution. Controlling and reducing industrial wastewater pollution is an important content and guarantee for improving the quality of my country's water environment. There are many types of industrial industries, and the nature of wastewater is very different, making it difficult to treat. With the vigorous promotion of the comprehensive treatment of environmental pollution by the 19th National Congress of the Communist Party of China, the discharge standards and supervision of industrial wastewater will be further improved.

The main characteristics of comprehensive industrial wastewater are: (1) The composition of wastewater is complex and the concentration of pollutants is high; (2) The wastewater has certain toxicity and poor biochemical properties; (3) The volume and quality of wastewater are unstable. The selection of comprehensive industrial wastewater treatment process should be based on comprehensive consideration of various factors such as design influent water quality, wastewater discharge indicators, land area and project scale. It is a mature process that is convenient for management and suitable for phased construction.

With the development of industrial wastewater treatment process technology, the process methods are changing with each passing day and there are many types. Numerous process methods provide opportunities for multiple choices in engineering design, but also form certain difficulties in determining the best process plan in engineering design. Traditional industrial wastewater treatment technology has problems such as large investment, high treatment cost, complicated treatment process, unstable treatment effect and strict management requirements.

Utility model content

The purpose of this utility model is to solve the above-mentioned deficiencies existing in the prior art.

In order to achieve the above purpose, the utility model provides a comprehensive industrial wastewater treatment system, including sequentially connected pretreatment unit, hydrolysis tank, constant water level SBR tank, filter collection tank, ozone oxidation and destruction tank, biological aerated filter tank, disinfection pool; the pretreatment unit at least includes: grid well, sump, lift pump room, grit chamber, regulation pool, accident pool, coagulation air flotation tank, among which, grid well, sump, lift pump room, grit chamber Connected end to end in turn, the outlet of the grit chamber is connected to the water inlet of the accident pool and the first water inlet of the adjustment pool through the first electric valve and the second electric valve respectively, and the water outlet of the accident pool is connected to the second water inlet of the adjustment pool, The water outlet of the regulating tank is connected to the coagulation air flotation tank, and the water outlet of the coagulation air flotation tank is connected to the hydrolysis tank; the constant water level SBR pool includes at least 2 sets of SBR pools, and each set of SBR pools is composed of a series of one-phase SBR pools and two-phase SBR pools , the one-phase SBR pool and the two-phase SBR pool are connected through the first constant water level decanter, wherein the liquid level of the two-phase SBR pool is lower than that of the one-phase SBR pool, and the waste water of the two-phase SBR pool is refluxed to the first-phase SBR pool through the reflux device The bottom of the SBR tank, the one-phase SBR tank and the two-phase SBR tank are all equipped with aeration devices.

Preferably, a rotary disc filter is arranged in the filter sump.

Preferably, the ozone oxidation and destruction tank includes an ozone oxidation system and an ozone destruction system.

Preferably, the coagulation air flotation tank includes a coagulation reaction zone and a sedimentation zone, wherein the water inlet of the coagulation reaction zone is connected to the water outlet of the adjustment tank, and the water outlet of the sedimentation zone is connected to the water inlet of the hydrolysis tank.

Preferably, a mechanical grill is arranged in the grill well.

The utility model adopts "pretreatment + constant water level SBR + ozone oxidation + biological aerated filter" with simple process flow, wide applicability, low cost and high efficiency, and is a comprehensive industrial wastewater treatment system worth promoting.

Description of drawings

Fig. 1 is the composition schematic diagram of a kind of comprehensive industrial waste water treatment system that the utility model embodiment provides;

Fig. 2 is the schematic diagram of the connection of the grid well, sump and lifting pump room provided by the embodiment of the utility model;

Fig. 3 is the schematic diagram of the connection of the grit chamber, the accident pond and the regulating pond provided by the embodiment of the utility model;

Fig. 4 is the schematic diagram of the connection of the coagulation air flotation tank and the hydrolysis tank provided by the embodiment of the utility model;

Fig. 5 is the structural representation of the constant water level SBR pond that the utility model embodiment provides;

Fig. 6 is the schematic diagram of connection of the turntable filter provided by the embodiment of the present invention, the filter sump and the ozone oxidation and destruction pool;

Figure 7 is a schematic diagram of the connection between the biological aerated filter and the disinfection tank provided by the embodiment of the present invention;

Explanation of reference signs:

1-Grill well, 2-Collecting tank, 3-Elevating pump room, 4-Grit chamber, 5-Accident tank, 6-Regulation tank, 7-Coagulation air flotation tank, 8-Hydrolysis tank, 9-Constant water level SBR Pool, 10-rotary disc filter, 11-filter collection tank, 12-ozone oxidation and destruction tank, 13-biological aerated filter tank, 14-disinfection tank, 15-sand water separator, 16-first electric valve, 17 -Second electric valve, 18-Coagulation reaction zone, 19-Sedimentation zone, 20-First constant water level decanter, 21-Second constant water level decanter, 22-Aeration device, 23-One-phase SBR tank , 24-two-phase SBR pool, 25-mechanical grid.

Detailed ways

The technical solutions of the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1-7, the utility model embodiment provides a comprehensive industrial wastewater treatment system, including a pretreatment unit, a hydrolysis tank 8, a constant water level SBR tank 9, a filter collection tank 11, a rotary filter 10, an ozone oxidation and destruction tank 12. Biological aerated filter 13, disinfection pond 14.

The pretreatment unit at least includes: grid well 1, sump tank 2, lifting pump room 3, grit chamber 4, regulating tank 6, accident tank 5, coagulation air flotation tank 7. Among them, the grid well 1, the sump 2 and the lifting pump room 3 are jointly built and connected in sequence, wherein a mechanical grid 25 is arranged in the grid well 1, and the water outlet of the lifting pump room 3 is connected to the water inlet of the grit chamber 4 , the water outlet of the grit chamber 4 is connected to the water inlet of the emergency pool 5 and the first water inlet of the regulating pool 6 through the first electric valve 16 and the second electric valve 17 respectively, wherein the water outlet of the accident pool 5 is also connected to the regulating The second water inlet of pool 6. Under normal operating conditions, the first electric valve 16 is closed and the second electric valve 17 is open, and the waste water flows from the grit chamber 4 to the regulating pool 6 by gravity; under an accident state, the first electric valve 16 is open and the second electric valve 17 is closed , the waste water relies on gravity to flow from the grit chamber 4 to the accident pool 5, and then is lifted to the regulating pool 6 by the pump.

The residence time of the regulating pond 6 is 12-24 hours, and the residence time of the accident pond 5 is 8-24 hours. Both the regulating pond 6 and the accident pond 5 are equipped with agitators to prevent the sedimentation of suspended matter.

The coagulation air flotation tank 7 includes a coagulation reaction zone 18 and a sedimentation zone 19, wherein the water inlet of the coagulation reaction zone 18 is connected to the water outlet of the regulating tank 6, and the water outlet of the sedimentation zone 19 is connected to the water inlet of the hydrolysis tank 8, and the hydrolysis tank The water outlet of 8 is connected with constant water level SBR pool 9.

In one example, the proportion of filler added in the hydrolysis tank 8 is 20%-35%. The wastewater from the water distributing device at the bottom of the hydrolysis tank 8 evenly passes through the sludge packing layer from bottom to top, and in the process of ejecting water from the hydrolysis tank 8, the anaerobic or facultative bacteria enriched in the filler are used in the hydrolysis and acidification stages. Hydrolysis of suspended organic solids and refractory macromolecules in wastewater into soluble organics and easily biodegradable small molecules, while releasing organic nitrogen in wastewater into inorganic nitrogen, improving the removal efficiency of total nitrogen. The macromolecules here include carbohydrates, fats, and lipids. The residence time of the waste water in the hydrolysis tank 8 is 4-8h.

The constant water level SBR pool 9 includes 2 groups of SBR pools, each group of SBR pools is composed of two SBR pools connected in series, which are respectively a one-phase SBR pool 23 and a two-phase SBR pool 24, and the constant water level SBR pool 9 also includes the first constant water level decanter The water tank 20, the second constant water level decanter 21, the aeration device 22, the two SBR tanks are connected through the first constant water level decanter 20, the liquid level of the two-phase SBR tank is lower than that of the one-phase SBR tank, and the second The phase SBR tank returns the wastewater to the one-phase SBR pool through the reflux device, and the return ratio is 100%-300%. The two-phase SBR tank 24 is connected with the filter sump 11 through the second constant water level decanter 21 . An aeration device 22 is arranged at the bottom of each grid SBR pool.

In one example, fillers are added to the constant water level SBR pool 9, and the fillers enrich a variety of microorganisms. At the same time, multi-parameters such as dissolved oxygen and pH value are combined to enrich a variety of microbial aggregates, and complete simultaneous nitrification and denitrification and heterotrophic The combination of denitrification realizes one-step low-consumption and high-efficiency removal of ammonia nitrogen. The SBR pool can be selected as the SBR pool in the patent whose publication number is CN104085989A.

In one example, the constant water level SBR pool 9 is also equipped with a flow impeller, and the design air-water ratio is 10:1.

In one example, the proportion of 9 fillers in the constant water level SBR tank is 20%-35%, and the sludge concentration can reach more than 8000mg/L, which greatly increases the concentration and volume load of microorganisms in the reaction system, and combines the biofilm method to the activity In the sludge process, the respective advantages of the two processes are used to form a composite activated sludge-biofilm symbiosis system enhanced treatment process.

In one example, the constant water level SBR pool 9 is also equipped with an automatic control system and an online monitoring system to automate a series of functions such as water inflow, water outflow, aeration, stirring, and reflux, so as to keep each function running under optimal conditions.

A turntable filter 10 is arranged in the filtration sump, and the water outlet of the filtration sump 11 is connected to the water inlet of the ozone oxidation and destruction pool 12, and its outlet water is lifted to the ozone oxidation and destruction pool 12 by a pump.

The ozone oxidation and destruction tank 12 includes an ozone oxidation system and an ozone destruction system. The water outlet of the ozone oxidation and destruction tank 12 is connected to the water inlet of the biological aerated filter 13, and the water outlet of the biological aerated filter 13 is connected to the inlet of the disinfection tank 14. Shuikou.

In one example, the ratio of the filler added to the biological aerated filter 13 is 15%-35%, and the ratio here refers to the ratio of the filler to the effective volume of the tank.

The specific implementation steps are as follows:

1) Pretreatment unit: Wastewater discharged by each unit passes through the grid 25 in the grid well to intercept the large particle suspended matter in the wastewater, flows into the sump 2 by gravity, and then is lifted into the grit chamber 4 by the pump.

An online monitoring instrument is installed in the sump 2, and the waste water can be directly switched and lifted to the accident pool 5 for temporary storage in the event of an accident. The small flow of waste water in the accident pool 5 is lifted into the regulating pool 6 by the lifting pump. After the waste water is removed from the grit chamber 4 to remove the denser silt and other inorganic particles, it flows into the regulating pond 6 by itself. The regulating pond 6 is equipped with a mixer to stir to prevent the sedimentation of suspended solids, so as to ensure that the effluent quality of the regulating pond is relatively stable.

The effluent of the adjustment tank 6 is lifted to the coagulation air flotation tank 7, and coagulant is added in the coagulation reaction zone 18 of the coagulation air flotation tank 7 to make the suspended solids, colloids, etc. form larger flocs, and then pass into the air flotation separation After the equipment, a large number of dense fine air bubbles adhere to each other to form flocs with a specific gravity smaller than that of water, which float to the water surface by buoyancy, thereby completing the solid-liquid separation and removal.

2) Hydrolysis tank: The water from the coagulation air flotation tank 7 flows into the hydrolysis tank 8 by itself, and the functions of improving the biodegradability of wastewater and removing suspended matter are realized in the hydrolysis tank 8 . Provide suitable and stable water quality for subsequent aerobic treatment system.

3) Constant water level SBR pool:

Constant water level SBR process operation mode: set 2 groups of constant water level SBR pools to operate alternately, divided into group A and group B, each group of pools is divided into two cells: one-phase SBR pool and two-phase SBR pool, set every 6 hours as a cycle . In one cycle, the ponds in group A closed the water inlet valve and aerated, stopped the aeration after 5 hours of aeration and stirred for 0.5 hours, then stopped stirring, and settled for 0.5 hours; Decanter to drain. In the next cycle, group B closes the water inlet valve and aerates, stops aeration after 5 hours of aeration and stirs for 0.5 hours, then stops stirring, and settles for 0.5 hours; drain. Switch between each other according to this operation sequence to ensure the continuous operation of wastewater treatment.

It should be understood that, according to design requirements, the length of the above cycle can be changed.

4) Filtration sump: the gravity flow of waste water enters the turntable filter 10, and the filter sump 11 is equipped with baffle energy dissipation facilities, the waste water is filtered through the filter cloth, and the filtered liquid is collected through the hollow pipe to collect the gravity flow and discharged through the overflow tank. pool. During filtration, part of the sludge is adsorbed on the outside of the filter cloth, gradually forming a sludge layer. With the accumulation of sludge on the filter cloth, the filter resistance of the filter cloth increases, and the water level of the filter tank gradually rises. The pressure measuring device can monitor the filter tank and the outlet water. The water level difference between the water heads on the weir, when the water level difference reaches the set backwash value, the automatic control system automatically controls the backwash pump to start the backwash process.

5) Ozone oxidation treatment system: After the wastewater is treated by the constant water level SBR pool 9, a large number of biochemical and biodegradable organic pollutants are mostly degraded, while the trace organic matter remaining in the water affects the discharge of the wastewater. Ozone produces hydroxyl radicals to react with organic matter in water, oxidizes or partially oxidizes organic matter, decomposes and breaks chains of macromolecular organic matter, and the effluent enters the ozone destruction pool by itself to eliminate the remaining ozone.

6) Biological aerated filter: The effluent from the ozone oxidation and destruction tank 12 is lifted by the pump into the biological aerated filter 13. The biggest feature of the biological aerated filter technology is the use of fillers, which grow on the surface of the fillers and in the open cavity space Microbial membrane, when the wastewater flows through the filter layer, the microbial membrane absorbs the organic pollutants in the wastewater as nutrients for its own metabolism, aerobically degrades the organic matter in the wastewater, and performs nitrification and denitrification. It regularly uses the treated effluent to backwash the filter to remove the aging biofilm that proliferates on the surface of the filter material to ensure the activity of the microbial film.

7) Disinfection tank: the effluent from the biological aerated filter 13 flows into the disinfection tank 14 by itself, and after chlorine dioxide is added for disinfection, the effluent pump is lifted to meet the discharge standard.

The utility model has the following beneficial effects:

The comprehensive industrial wastewater treatment system of the utility model "pretreatment + constant water level SBR + ozone oxidation + aerated biological filter" has simple process flow, wide applicability, stable treatment effect, low cost and high efficiency, and is a comprehensive industrial wastewater worthy of promotion Processing technology.

The advantages of the constant water level SBR pool: ① Using the method of strain separation, the decarbonization and denitrification of wastewater are realized separately, and the superior functions of the strains are brought into play to the greatest extent; High wastewater has many advantages, providing a good production environment for simultaneous nitrification and denitrification bacteria, so as to achieve its efficient denitrification; ③Reduce operating costs by reasonably controlling the operating conditions of each unit; ④Its impact resistance, The characteristics of easy recovery and flexible operation are well targeted for the volatility and impact problems that are mainly faced in the actual operation of industrial wastewater treatment.

Compared with the traditional process, the ozone oxidation + biological aerated filter combination process has greatly improved the treatment effect and maintenance, and compared with the Fenton process, the sludge output has been greatly reduced, and the sludge disposal cost has been saved.

The above specific implementations have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. It should be understood that the above are only specific implementations of the present utility model, and are not intended to limit the protection of the present utility model. Scope, within the spirit and principles of the present utility model, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present utility model.

Claims (5)

1. A comprehensive industrial waste water treatment system is characterized in that it comprises successively connected pretreatment units, hydrolysis tanks (8), constant water level SBR pools (9), filter pools (11), ozone oxidation and destruction pools (12 ), biological aerated filter (13), disinfection pond (14); The pretreatment unit at least includes: grid well (1), sump (2), lifting pump room (3), grit chamber (4), regulating pool (6), accident pool (5), coagulation gas The floating pond (7), wherein, the grid well (1), the sump (2), the lifting pump room (3), and the grit chamber (4) are connected end to end in sequence, and the water outlets of the grit chamber (4) respectively pass through the first The electric valve (16) and the second electric valve (17) connect the water inlet of the accident pond (5) and the first water inlet of the regulating pond (6), and the water outlet of the accident pond (5) connects all The second water inlet of the regulating tank (6), the water outlet of the regulating tank (6) is connected to the coagulation air flotation tank (7), and the water outlet of the coagulation air flotation tank (7) is connected to the hydrolysis tank (8); Described constant water level SBR pond (9) comprises at least 2 groups of SBR ponds, each group of SBR ponds is made up of a series-connected one-phase SBR pond (23) and two-phase SBR pond (24), and described one-phase SBR pond (23) and Described two-phase SBR pool (24) is connected through the first constant water level decanter (20), and wherein, the liquid level of described two-phase SBR pool (24) is lower than described one-phase SBR pool (23), two The waste water of phase SBR pool (24) is returned to one-phase SBR pool (23) by reflux device, and the bottom of described one-phase SBR pool (23) and described two-phase SBR pool (24) is all provided with aeration device (22 ). 2. The comprehensive industrial wastewater treatment system according to claim 1, characterized in that, a rotary disc filter (10) is arranged in the filter pool (11). 3. integrated industrial wastewater treatment system according to claim 1, is characterized in that, described coagulation air flotation tank (7) comprises coagulation reaction zone (18) and sedimentation zone (19), wherein, coagulation reaction zone ( The water inlet of 18) is connected to the water outlet of the regulating tank (6), and the water outlet of the sedimentation zone (19) is connected to the water inlet of the hydrolysis tank (8). 4. The comprehensive industrial wastewater treatment system according to claim 1, characterized in that, the ozone oxidation and destruction pool (12) comprises an ozone oxidation system and an ozone destruction system. 5. The integrated industrial wastewater treatment system according to claim 1, characterized in that a mechanical grill (25) is arranged in the grill well (1).