CN218596238U - Industrial park sewage factory tail water upgrading system - Google Patents

Abstract

The utility model provides a sewage factory tail water carries mark transformation system in industry garden, belongs to sewage treatment recycle technical field. Solves the problems of the prior art that COD does not reach the standard, the carbon source is low, the nitrogen and phosphorus removal efficiency of the treatment process is low, and the pollutant removal efficiency is low. The technical points are as follows: the ozone contact oxidation tank, the denitrification deep bed filter, the subsurface flow constructed wetland and the immersed ultrafiltration are sequentially communicated through pipelines, and the bottom of the ozone contact oxidation tank is provided with an aeration disc which is connected with an ozone generator through an aeration pipe; the denitrification deep bed filter is internally filled with filter materials, and the top of the denitrification deep bed filter is provided with a carbon source adding pipeline; the inside of the subsurface flow constructed wetland is provided with a filler; the immersed ultrafiltration membrane is vertically arranged in the immersed ultrafiltration membrane, the bottom end of the ultrafiltration membrane is connected with an ultrafiltration aeration pipe, and the top end of the ultrafiltration membrane is connected with a recovery or discharge pipe. The utility model discloses guaranteed that water quality stability maintains the limit value of surface water environmental quality standard, improved the environmental function of earth's surface water, satisfied environmental protection's requirement.

Description

Industrial park sewage plant tail water upgrading system

Technical Field

The utility model relates to a tail water carries mark transformation system, concretely relates to industry garden sewage plant tail water carries mark transformation system belongs to sewage treatment recycle technical field.

Background

In recent years, along with the continuous enhancement of environmental protection, grippers for pollution emission reduction and surface water environment quality improvement are focused on stricter drainage standards of comprehensive sewage treatment plants in more and more areas. In view of the problems that the discharge standard of the sewage plant in the industrial park is improved, the treatment scale is increased, the effluent cannot stably reach the standard and the like, the sewage treatment upgrading and modification in the industrial park are imperative. Especially for centralized sewage treatment plants in industrial parks, the inlet water is mostly industrial wastewater (generally more than 50 percent), contains various refractory organics, has strong biological toxicity and poor biodegradability, and has more treatment difficulty than domestic sewage. Therefore, the upgrading and reconstruction technology of the centralized sewage treatment plant in the industrial park has higher requirements.

The upgrading and reconstruction of the industrial park sewage treatment plant faces a plurality of difficulties, specifically: 1. COD does not reach the standard, and because the sewage discharged into the park is mostly treated in enterprises, the biochemical property of the wastewater is extremely low, and toxic and harmful refractory substances exist; 2. the method has the advantages that the method has the problem of low carbon source, and many small and medium-sized sewage treatment companies have the condition of low carbon-nitrogen ratio, which can bring adverse effects on denitrification; 3. the nitrogen and phosphorus removal efficiency of the treatment process is low, and the pollutant removal efficiency is low.

Therefore, a new type tail water upgrading system for sewage plants in industrial parks is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

In view of the above fact, the utility model discloses a COD that exists is not up to standard, low carbon source, processing technology nitrogen and phosphorus removal inefficiency among the prior art, and the pollutant is got rid of the inefficiency problem, and then has designed an industrial park sewage plant tail water upgrading system of reforming transform, ensures that water quality stability maintains the limit value of surface water environmental quality standard, has improved the environmental function of surface water, satisfies environmental protection's requirement.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a tail water upgrading and reforming system of an industrial park sewage plant comprises an ozone contact oxidation tank, a denitrification deep bed filter, an undercurrent artificial wetland and immersed ultrafiltration; the ozone contact oxidation tank, the denitrification deep bed filter, the subsurface flow constructed wetland and the immersed ultrafiltration are communicated in sequence through pipelines; the bottom of the ozone contact oxidation tank is provided with a plurality of aeration disks, the aeration disks are connected with an ozone generator through aeration pipes, the ozone generator is arranged outside the ozone contact oxidation tank, and the side wall of the ozone contact oxidation tank is provided with a tail water pipe of an industrial park sewage plant; the inside of the denitrification deep-bed filter is filled with filter materials, and the top of the denitrification deep-bed filter is provided with a carbon source adding pipeline; the inside of the subsurface flow constructed wetland is provided with a filler; the submerged ultrafiltration system is characterized in that a plurality of ultrafiltration membranes are vertically arranged in the submerged ultrafiltration system, the bottom ends of the ultrafiltration membranes are connected with an ultrafiltration aeration pipe, and the top ends of the ultrafiltration membranes are connected with a recovery or discharge pipe.

Further, the method comprises the following steps: the liquid level height of the ozone contact oxidation pond is greater than that of the denitrification deep-bed filter pond, the liquid level height of the denitrification deep-bed filter pond is greater than that of the undercurrent artificial wetland, and the liquid level height of the undercurrent artificial wetland is greater than that of the immersed ultrafiltration. So set up, among the entire system waste water utilizes pipeline residual pressure to get into the system, perhaps only need once promote, can flow automatically according to the liquid level difference and pass through ozone contact oxidation pond, denitrification deep bed filtering pond, undercurrent constructed wetland and submergence formula ultrafiltration in proper order, practiced thrift the operation charges of electricity, reduced carbon and discharged.

Further, the method comprises the following steps: and the immersed ultrafiltration adopts siphon to produce water and siphon to immerse the ultrafiltration membrane according to the liquid level difference between the subsurface flow constructed wetland and the immersed ultrafiltration. By the arrangement, the membrane can stably run for a long time under the conditions of no pump and low liquid level difference, and the power consumption is greatly saved while the water production capacity is ensured.

Further: the bottom of the denitrification deep-bed filter is provided with a deep-bed filter flushing pipeline, and when a membrane element is blocked, the membrane element is flushed through the flushing pipeline to recover the performance of the ultrafiltration membrane. And the gas and the water are adopted for back flushing in a synergistic manner, so that the final integral back flushing water, the gas pressure and the flow on the filtering area of the whole filter are uniform, and the back flushing uniformity and no blind area of the filter are ensured.

Further: the sewage in the subsurface flow constructed wetland flows along the vertical direction, and the filler adopts graded filler. By the arrangement, the oxygen enrichment capacity in the wetland is improved, and the aerobic degradation of organic matters and the nitrification process of nitrogen by microorganisms in the wetland are facilitated. Proper filler grading can ensure that target pollutants can be effectively removed, simultaneously, blockage is avoided, and the operation period is prolonged. Suspended matters, particulate matters, COD and ammonia nitrogen in the water body are further removed through the subsurface flow constructed wetland, and the normal work of the immersed ultrafiltration is ensured. The artificial wetland process has the advantages of low capital construction and operation cost, convenient maintenance and landscape value.

Further, the method comprises the following steps: the filter material in the denitrification deep-bed filter tank is coarse-grained and round. So set up, through providing sufficient hole, ensure the degree of depth of suspended solid and hold back and the growth of biocenosis, and then improve the throughput of biomembrane to sewage.

The utility model discloses the effect that reaches does:

1. the utility model discloses a built-in aeration dish in ozone contact oxidation pond, ozone is thrown and is come from ozone generator, through ozone catalytic oxidation reaction back for it reaches the design index requirement to go out water.

2. After being treated by the ozone contact oxidation pond, the wastewater flows into a denitrification deep bed filter to realize the cooperative removal of total nitrogen and COD in the water. The carbon source adding system can realize the accurate adding of the carbon source controlled according to the nitrate nitrogen load to be removed, and avoids the excessive and insufficient adding of the carbon source.

3. And further removing suspended matters, particles, COD (chemical oxygen demand) and ammonia nitrogen in the water body by the wastewater through the subsurface flow constructed wetland. The artificial wetland process has the advantages of low capital construction and operation cost, convenient maintenance and landscape value.

4. The immersed ultrafiltration adopts a siphon water production mode according to the liquid level difference of the wetland and the ultrafiltration, and the siphon immersed ultrafiltration membrane process can realize the long-term stable operation of the membrane under the conditions of no pump and low liquid level difference, thereby greatly saving the power consumption while ensuring the water production capacity. When the membrane element is dirty and blocked, backwashing is carried out through a backwashing pump and the aeration pipe is subjected to air washing, and the performance of the ultrafiltration membrane is recovered.

5. The utility model discloses guaranteed that the stable limit value in accurate IV class in surface water environment quality standard (GB 3838-2002) of maintaining of quality of water can directly discharge the water, perhaps reuse in garden industrial production, improved the environmental function of surface water, reform transform the system and can effectively reduce into river pollution load, accurate support aquatic attitude environmental quality improves, maintains water environment water stabilization.

Drawings

Fig. 1 is the utility model discloses a structural schematic diagram of industrial park sewage plant tail water upgrading system of reforming transform.

Wherein: 1-an ozone contact oxidation tank; 1-1, an aeration disc; 1-2 ozone generators; 1-3 draft tubes of sewage plants in industrial parks; 2-denitrification deep bed filter; 2-1, filtering materials; 2-2 carbon source adding pipelines; 2-3, flushing a pipeline of the deep bed filter; 3-undercurrent artificial wetland; 3-1 of a filler; 4-immersion ultrafiltration; 4-1 ultrafiltration membrane; 4-2, an ultrafiltration aeration pipe; 4-3 withdrawal or drain.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "disposed," "connected," and "fixed" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to fig. 1 in conjunction with an embodiment.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The embodiment is as follows: referring to fig. 1, the system for upgrading tail water of an industrial park sewage plant of the embodiment comprises an ozone contact oxidation tank 1, a denitrification deep bed filter tank 2, an underflow constructed wetland 3 and an immersed ultrafiltration 4; the ozone contact oxidation tank 1, the denitrification deep bed filter tank 2, the subsurface flow constructed wetland 3 and the immersed ultrafiltration 4 are communicated in sequence through pipelines; the liquid level height of the ozone contact oxidation tank 1 is greater than that of the denitrification deep-bed filter tank 2, the liquid level height of the denitrification deep-bed filter tank 2 is greater than that of the undercurrent artificial wetland 3, and the liquid level height of the undercurrent artificial wetland 3 is greater than that of the submerged ultrafiltration 4; the immersed ultrafiltration membrane 4 adopts siphon to produce water according to the liquid level difference between the subsurface flow constructed wetland 3 and the immersed ultrafiltration membrane 4, and siphons the immersed ultrafiltration membrane 4-1; the bottom of the ozone contact oxidation tank 1 is provided with a plurality of aeration disks 1-1, the aeration disks 1-1 are connected with an ozone generator 1-2 through aeration pipes, the ozone generator 1-2 is arranged outside the ozone contact oxidation tank 1, and the side wall of the ozone contact oxidation tank 1 is provided with a tail water pipe 1-3 of an industrial park sewage plant; the denitrification deep-bed filter 2 is internally filled with filter materials 2-1, the filter materials 2-1 are coarse-grained and round filter materials, a carbon source feeding pipeline 2-2 is installed at the top of the denitrification deep-bed filter 2, and a deep-bed filter flushing pipeline 2-3 is installed at the bottom of the denitrification deep-bed filter 2; the subsurface flow constructed wetland 3 is internally provided with a filler 3-1, sewage in the subsurface flow constructed wetland 3 flows along the vertical direction, and the filler 3-1 adopts a graded filler; a plurality of ultrafiltration membranes 4-1 are vertically arranged inside the immersed ultrafiltration membrane 4, the bottom ends of the ultrafiltration membranes 4-1 are connected with an ultrafiltration aeration pipe 4-2, and the top ends of the ultrafiltration membranes 4-1 are connected with a recovery or discharge pipe 4-3.

The working process comprises the following steps: the industrial park sewage plant enters the ozone contact oxidation tank for pretreatment to treat the refractory substances, so that the problem of poor selectivity of hydroxyl radical (. OH) oxidation to target pollutants in the wastewater is solved, the pollutants containing unsaturated bonds are preferentially oxidized, the selective degradation of organic poisons and refractory substances is realized, and the biochemical level of the wastewater can be effectively improved. An aeration disc is arranged in the ozone contact oxidation tank, ozone is fed from an ozone generator, and after the ozone is subjected to catalytic oxidation reaction, the effluent water reaches the design index requirement. The wastewater treated by the ozone contact oxidation pond flows into a denitrification deep bed filter to realize the cooperative removal of the total nitrogen and COD in the water. The filter material in the filter tank is made of relatively coarse-grained and round media, and the deep interception of suspended solids and the growth of biological communities are ensured by providing enough pores, so that the sewage treatment capacity of the biological membrane is improved. The carbon source adding system can realize the accurate adding of the carbon source controlled according to the nitrate nitrogen load to be removed, and avoids the excessive and insufficient adding of the carbon source. The denitrification deep-bed filter is matched with a deep-bed filter flushing system, and the back flushing is carried out by adopting gas and water in a synergic manner, so that the final integral back flushing water, the gas pressure and the flow on the filtering area of the whole filter are uniform, and the back flushing uniformity and no blind area of the filter are ensured. The water treated by the denitrification deep bed filter enters the subsurface flow constructed wetland, and the sewage in the wetland flows along the vertical direction, so that the oxygen enrichment capacity in the wetland is improved, and the aerobic degradation of microorganisms in the wetland on organic matters and the nitrification process on nitrogen are facilitated. The subsurface flow constructed wetland filler adopts graded filler, and proper grading of the filler can ensure that target pollutants can be effectively removed, simultaneously avoid blockage and prolong the operation period. Suspended matters, particulate matters, COD and ammonia nitrogen in the water body are further removed through the subsurface flow constructed wetland, and the normal work of the immersed ultrafiltration is ensured. The artificial wetland process has the advantages of low capital construction and operation cost, convenient maintenance and landscape value. The effluent of the subsurface flow constructed wetland flows into the submerged ultrafiltration, the submerged ultrafiltration adopts a siphon water production mode according to the liquid level difference of the wetland and the ultrafiltration, and the siphon submerged ultrafiltration membrane process can realize the long-term stable operation of the membrane under the conditions of no pump and low liquid level difference, thereby greatly saving the power consumption while ensuring the water production capacity. When the membrane element is dirty and blocked, backwashing is carried out through a backwashing pump and the aeration pipe is used for carrying out air washing, and the performance of the ultrafiltration membrane is recovered. The waste water of the whole process system enters the system by utilizing the residual pressure of the pipeline, or only needs to be lifted once, and can automatically flow through the ozone contact oxidation tank, the denitrification deep bed filter tank, the undercurrent artificial wetland and the immersed ultrafiltration according to the liquid level difference, so that compared with other processes, the operation electricity cost is saved, and the carbon emission is reduced. The treated effluent water passing through the whole system flow reaches the quasi-IV limit value in the surface water environmental quality standard (GB 3838-2002), and can be directly discharged into water bodies or reused for industrial production in gardens. The transformation can effectively reduce the pollution load in the river, accurately support the improvement of the quality of the water ecological environment and maintain the stable water quality of the water environment.

The above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.

Claims (6)

1. The utility model provides a system is reformed transform to industry garden sewage factory tail water carries mark which characterized in that: comprises an ozone contact oxidation tank (1), a denitrification deep bed filter (2), an undercurrent artificial wetland (3) and an immersed ultrafiltration (4); the ozone contact oxidation tank (1), the denitrification deep bed filter (2), the subsurface flow constructed wetland (3) and the immersed ultrafiltration (4) are communicated in sequence through pipelines; the bottom of the ozone contact oxidation tank (1) is provided with a plurality of aeration disks (1-1), the aeration disks (1-1) are connected with ozone generators (1-2) through aeration pipes, the ozone generators (1-2) are arranged outside the ozone contact oxidation tank (1), and the side wall of the ozone contact oxidation tank (1) is provided with a tail water pipe (1-3) of a sewage plant in an industrial park; a filtering material (2-1) is filled in the denitrification deep bed filter (2), and a carbon source adding pipeline (2-2) is installed at the top of the denitrification deep bed filter (2); a filler (3-1) is arranged inside the subsurface flow constructed wetland (3); a plurality of ultrafiltration membranes (4-1) are vertically arranged inside the immersed ultrafiltration membrane (4), the bottom ends of the ultrafiltration membranes (4-1) are connected with an ultrafiltration aeration pipe (4-2), and the top ends of the ultrafiltration membranes (4-1) are connected with a recovery or discharge pipe (4-3).

2. The industrial park sewage plant tail water upgrading system of claim 1, which is characterized in that: the liquid level height of the ozone contact oxidation pond (1) is greater than that of the denitrification deep bed filter pond (2), the liquid level height of the denitrification deep bed filter pond (2) is greater than that of the undercurrent artificial wetland (3), and the liquid level height of the undercurrent artificial wetland (3) is greater than that of the submerged ultrafiltration (4).

3. The industrial park sewage plant tail water upgrading system of claim 2, which is characterized in that: the immersed ultrafiltration membrane (4) adopts siphon to produce water according to the liquid level difference between the subsurface flow constructed wetland (3) and the immersed ultrafiltration membrane (4), and the siphon immerses the ultrafiltration membrane (4-1).

4. The industrial park sewage plant tail water upgrading system of claim 3, which is characterized in that: the bottom of the denitrification deep-bed filter (2) is provided with a deep-bed filter flushing pipeline (2-3).

5. The industrial park sewage plant tail water upgrading system of claim 4, which is characterized in that: the sewage in the subsurface flow constructed wetland (3) flows along the vertical direction, and the filler (3-1) adopts graded filler.

6. The industrial park sewage plant tail water upgrading system of claim 5, which is characterized in that: the filter material (2-1) in the denitrification deep-bed filter tank (2) is coarse-grained and round.

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