CN218371960U

CN218371960U - Sewage treatment device

Info

Publication number: CN218371960U
Application number: CN202222999538.0U
Authority: CN
Inventors: 郭钊搏; 国墨杰; 高叶松; 周国喜; 张驰; 王宗葳; 赵玲
Original assignee: China Construction Eco Environmental Group Co Ltd
Current assignee: China Construction Eco Environmental Group Co Ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-01-24
Anticipated expiration: 2032-11-10

Abstract

The utility model provides a sewage treatment device, including membrane aeration-biomembrane component pond, combination filler pond and the inclined plate sedimentation tank that communicate in proper order, the rear side of inclined plate sedimentation tank still is equipped with air stripping mud discharging device and air stripping reflux unit. The sewage of the utility model flows through the membrane aeration-biomembrane component tank and the combined filler tank in sequence to remove COD, TD and TP; the water flows out of a water outlet after being precipitated by an inclined plate sedimentation tank; simultaneously, water flows are internally refluxed through the gas stripping reflux device; the precipitated sludge is transferred to a sludge tank in a gas stripping mode, and supernatant in the sludge tank flows out in an overflow mode.

Description

Sewage treatment device

Technical Field

The utility model relates to a sewage treatment device technical field especially relates to a sewage treatment device.

Background

At present, the treatment of rural domestic sewage in China mainly adopts two modes of centralized treatment and decentralized treatment. By adopting a centralized treatment mode, a large amount of sewage collecting pipe networks are required to be constructed, the investment accounts for 80-90% of the total engineering investment, the engineering investment is huge, the construction process is limited by the surrounding environment, the construction difficulty is high, and the construction quality is difficult to ensure; later maintenance work such as dredging and dredging of pipelines brings great pressure to operation. Meanwhile, due to the special discharge characteristics of rural sewage, the problems of complex operation, maintenance and management, large workload, poor stability of treatment effect and the like generally exist in practical application of the currently applied mainstream process, so that the normal operation rate of facilities is very low.

The system adopts a dispersion treatment mode, has a simpler structure and is more convenient to manage, the pollutant removal mainly takes COD as the main part, but has poorer treatment effect on TN and TP, and is difficult to popularize and apply on a large scale; if main pollution indexes such as COD, TN and TP are required to reach higher emission standards, the process and operation of treatment equipment are complex, great personnel and capital pressure can be generated for project operation by operation and maintenance of a large amount of equipment in the later period, the operation cost is obviously increased, the corresponding occupied area is also increased, and the practicability is basically unavailable.

Therefore, a set of rural household domestic sewage treatment equipment which is simple in process structure, convenient to operate and manage, low in operation cost and good in treatment effect on pollution indexes such as COD (chemical oxygen demand), TN (total nitrogen) and TP (total phosphorus) is required to be developed, and the method has important significance for reducing rural sewage engineering investment in China, improving engineering quality and relieving later-stage operation pressure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sewage treatment device, have that technology structure is simple, the operation management is convenient, the running cost is low, area is little, all have the advantage of better treatment to pollution indexes such as COD, TN, TP.

According to an object of the utility model, the utility model provides a sewage treatment device, including membrane aeration-biomembrane component pond, combination filler pond and the inclined plate sedimentation tank that communicate in proper order, the rear side of inclined plate sedimentation tank still is equipped with air stripping mud discharging device and air stripping reflux unit.

Furthermore, a membrane aeration-biological membrane component is arranged inside the membrane aeration-biological membrane component tank, and a combined filler is arranged inside the combined filler tank.

Furthermore, the number of the membrane aeration-biological membrane component tanks is multiple, and a water inlet is formed in the first membrane aeration-biological membrane component tank.

Further, the adjacent membrane aeration-biological membrane component tanks and the membrane aeration-biological membrane component tank and the combined filling tank are separated by partition plates.

Further, the membrane aeration-biological membrane component tank is communicated with the bottom of the combined filling tank.

Furthermore, cover plates are arranged between the membrane aeration-biological membrane component and the pool wall and between the membrane aeration-biological membrane component and the partition plates.

Further, the flowing direction of the water flow between each membrane aeration-biological membrane component tank is S-shaped.

Further, water flows overflow from the top of the combined filling tank into the inclined plate sedimentation tank.

Further, the gas stripping sludge discharge device is arranged between the bottom of the inclined plate sedimentation tank and the sludge tank, the designed water level of the sludge tank is higher than that of the inclined plate sedimentation tank, and a water outlet is formed in the inclined plate sedimentation tank.

Further, the air-stripping sludge discharge device is an air lifter, and the air-stripping reflux device is arranged between the inclined plate sedimentation tank and the membrane aeration-biological membrane component tank.

The sewage of the technical proposal of the utility model flows through the membrane aeration-biomembrane component pool and the combined filler pool in sequence to remove COD, TD and TP; the water flows out of a water outlet after being precipitated by an inclined plate sedimentation tank; transferring the precipitated sludge to a sludge tank in an air stripping mode, and enabling supernatant in the sludge tank to flow out in an overflow mode; meanwhile, the water flow carries out internal reflux through the air stripping reflux device. By adopting the combination of the modular membrane aeration-biological membrane component tank and the combined filling tank, the advantages of the two tanks can be utilized, the structure is simple, the equipment manufacturing difficulty can be greatly reduced, the manufacturing time is shortened, and the occupied area is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a sectional view of the membrane aeration-biofilm assembly tank of the present invention;

FIG. 3 is a cross-sectional view of the combined packing basin of the present invention;

FIG. 4 is a sectional view of the membrane aeration-biofilm assembly tank with aeration system of the present invention;

FIG. 5 is a sectional view of the combined packing pond with aeration system of the present invention;

in the figure: 1. membrane aeration-biofilm component tank; 2. a combined packing tank; 3. a sloping plate sedimentation tank; 4. a gas stripping mud discharging device; 5. a gas stripping reflux unit; 6. membrane aeration-biofilm assembly; 7. a water inlet; 8. a partition plate; 9. a cover plate; 10. a sludge tank; 11. a water outlet; 12. an aeration system.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in figures 1-5 of the drawings,

a sewage treatment device comprises a membrane aeration-biological membrane component tank 1, a combined filler tank 2 and an inclined plate sedimentation tank 3 which are sequentially communicated, and the rear side of the inclined plate sedimentation tank 3 is also provided with an air stripping sludge discharge device 4 and an air stripping reflux device 5.

The membrane aeration-biomembrane component tank 1 is internally provided with a membrane aeration-biomembrane component 6, and the membrane aeration-biomembrane component 6 mainly adopts a membrane aeration biomembrane, which is a more advanced sewage treatment process generated by combining a gas separation membrane technology and a biomembrane sewage treatment technology. The method has the advantage that nitrification and denitrification reactions can be synchronously carried out, the nitrification and denitrification reactions are respectively carried out on the inner side and the outer side of the biological membrane, TD, partial COD and TP are mainly removed, and compared with the traditional nitrification and denitrification processes which are respectively carried out, the method can reduce energy consumption and sludge yield. The membrane aeration-biological membrane component 6 is a product existing in the market, the specific structure of which is not described in detail herein and can be purchased and used as required.

The membrane aeration-biological membrane component tank 1 can be arranged in a plurality of tanks according to the water quantity demand, and the daily treatment capacity is 20m in the embodiment ₃ It is contemplated that three may be provided. A water inlet 7 is arranged in the first membrane aeration-biological membrane component tank 1, and sewage to be treated enters the first membrane aeration-biological membrane component tank 1 from the water inlet 7 for purification treatment. The adjacent membrane aeration-biological membrane component tanks 1 are separated by partition plates 8, the partition plates 8 are vertically arranged between the adjacent membrane aeration-biological membrane component tanks 1, two sides of each partition plate 8 are fixedly connected with the tank wall, and the top of each partition plate 8 is higher than that of each membrane aeration-biological membrane component 6.

The cover plate 9 is arranged between the membrane aeration-biological membrane component 6 and the pool wall, the membrane aeration-biological membrane component 6 and the pool wall are fixed through the cover plate 9, meanwhile, water flow and aeration gas can be blocked, and the situation that the water flow and the gas of lower aeration do not pass through the membrane aeration-biological membrane component 6 and excessively escape from a gap between the membrane aeration-biological membrane component 6 and the pool wall, so that the reaction is insufficient is avoided.

Meanwhile, a cover plate 9 is also arranged between the membrane aeration-biological membrane component 6 and the partition plate 8, similarly, the cover plate 9 arranged at the position fixes the membrane aeration-biological membrane component 6 and the partition plate 8, and can block water flow and aeration gas, so that the water flow and the gas aerated at the lower part are prevented from not passing through the membrane aeration-biological membrane component 6 and excessively escaping from a gap between the membrane aeration-biological membrane component 6 and the partition plate 8, and the situation of insufficient reaction is caused.

The tops of the plurality of membrane aeration-biofilm assemblies 6 are lower than the highest designed water level, and water flow and gas can only pass through the middle (up and down direction) of the membrane aeration-biofilm assemblies 6 due to the limitation of the transversely arranged cover plates 9, so that the biochemical reaction is always carried out to remove pollutants in the water flow movement process.

In order to increase the hydraulic retention time, the flow direction of the water flow among the various tank bodies is S-shaped. Specifically, as shown in fig. 2, the partition plates 8 are arranged alternately, a gap is formed between the bottom of the first partition plate 8 and the tank bottom, the second partition plate 8 is in contact with and fixed to the tank bottom, a gap is formed between the third partition plate (not shown) and the tank bottom, and so on, and by arranging in this way, sewage can flow from the bottom of the first membrane aeration-biofilm assembly tank 1 to the bottom of the second membrane aeration-biofilm assembly tank 1; then overflows from the top of the second membrane aeration-biological membrane component pool 1 into the third membrane aeration-biological membrane component pool 1, and the water flows among the pool bodies are in an S-shaped flow in the same way, and continuously flows up and down, so that the hydraulic retention time is prolonged. By adopting such a water flow method, the flow path is increased by nearly 1 time as compared with the case of the direct flow in the transverse direction, so that the residence time is increased and the reaction is more sufficient.

A gap is also formed between the partition plate 8 between the last membrane aeration-biofilm component tank 1 and the combined filling tank 2 and the tank bottom, so that sewage flows into the combined filling tank 2 from the bottom of the last membrane aeration-biofilm component tank 1.

The combined filler tank 2 is internally provided with combined fillers, the combined fillers can be selected from products existing in the market according to requirements, and the combined fillers mainly play a role in treating part of residual COD and TP in the effluent of the membrane aeration-biofilm component tank. The combined filler is a product existing in the market, the specific structure and principle of the combined filler are not described again, a plurality of combined filler pools can be arranged according to the water quantity requirement, and the daily treatment capacity is 20m in the embodiment ₃ It is contemplated that 2 may be provided.

The partition plates 8 are arranged among the combined filling tanks 2, and similarly, the partition plates among the combined filling tanks 2 are arranged alternately, namely, a gap is formed between the partition plate 8 and the bottom of the first combined filling tank 2 and the second combined filling tank 2, and water flows into the second combined filling tank 2 from the bottom of the first combined filling tank 2. If more than two combined filling tanks are adopted, the bottom of a partition plate between the second combined filling tank and the third combined filling tank is fixed with the bottom of the tank, water flows reversely flow into the third combined filling tank from the top of the second combined filling tank, and the like, so that sewage can flow into the bottom of the second combined filling tank from the bottom of the first combined filling tank; then the water overflows from the top of the second combined filling pool to the third combined filling pool, and the water flows among all the pool bodies in an S-shaped manner and continuously flows up and down, so that the hydraulic retention time is prolonged. By adopting such a water flow method, the flow path is increased by nearly 1 time as compared with the case of the direct flow in the transverse direction, so that the residence time is increased and the reaction is more sufficient.

Be equipped with baffle 8 between last combination filler pond 2 and the inclined plate sedimentation pond 3, the contact of this baffle 8 bottom and bottom of the pool just is fixed, rivers enter into inclined plate sedimentation pond 3 through baffle 8 overflow from the top of last combination filler pond 2 in, through carrying out the inclined plate sedimentation in inclined plate sedimentation pond 3, mud enters into the below of air stripping mud discharging device 4 from the swash plate of inclined plate sedimentation pond 3 bottom, air stripping mud discharging device 4 sets up between 3 bottoms of inclined plate sedimentation pond and sludge impoundment 10. The sludge is discharged into a sludge tank 10 through a discharge port of the air stripping sludge discharge device 4. The designed water level of the sludge tank 10 is higher than the water level of the inclined plate sedimentation tank 3, an overflow port is arranged at the top of the sludge tank 10, and the upper clear liquid can overflow to the inclined plate sedimentation tank 3 and is automatically discharged once every day. The water outlet 11 is arranged on the inclined plate sedimentation tank 3, and the treated clean water is discharged from the water outlet.

In the embodiment, the air-stripping sludge discharge device 4 adopts an air lifter, and for sludge, common sludge lifting equipment is a sludge pump and the air lifter. The efficiency of the sludge pump is higher, but the structure is complex, the energy consumption is correspondingly larger, and the sludge pump is suitable for the condition of more sludge. The air lifter has simple structure and convenient management, and the input air can supplement dissolved oxygen in the sludge and is particularly suitable for a system adopting blast aeration. The air lifter is usually attached to the mud inlet of a mud well or an aeration tank, and the air is distributed through a perforated air pipe to form an air-water emulsion, wherein the density of the liquid in the pipe is lower than that of the liquid outside the pipe, and the liquid rises.

In the embodiment, the gas stripping reflux device 5 is arranged between the inclined plate sedimentation tank 3 and the first membrane aeration-biological membrane component tank 1, the treated sewage is internally refluxed through the gas stripping reflux device 5, and the treated water is refluxed back to the front part, so that the concentration of the treated sewage at an inlet is reduced, and the treatment pressure is reduced; and secondly, the supplementary water quantity is adjusted when the water quantity is insufficient, and the operation is maintained.

In this embodiment, the stripping reflux unit 5 is an airlift, and the reflux apparatuses commonly used are a reflux pump and an airlift. The reflux pump has higher efficiency, but complex structure and correspondingly higher energy consumption, and is suitable for the condition of larger flow of large-scale equipment. The air lifter has simple structure and convenient management; the input air can supplement dissolved oxygen in the sewage, is particularly suitable for a system adopting blast aeration, and reduces the aeration supply. The air is distributed through the perforated air pipe to form an air-water emulsion, and the density of the liquid in the pipe is lower than that outside the pipe and rises.

In this embodiment, the membrane aeration system, the gas stripping sludge discharge device and the gas stripping reflux device used in the membrane aeration-biological membrane module 6 share two fans (not shown in the figure), and one fan is used for standby. The blower is connected with the aeration system 12 through an aeration pipe, and the blower is connected with the air lifter through a corresponding pipeline to supply air to the air lifter.

When the utility model is used, external rural domestic sewage enters the device through the water inlet and flows through the membrane aeration-biomembrane component tank 1 and the combined filler tank 2 in sequence to remove COD, TD and TP; the water flows out of a water outlet 11 after being precipitated by an inclined plate sedimentation tank 3; meanwhile, the water flow carries out internal reflux through the air stripping reflux device 5; the precipitated sludge is transferred by the air-stripping sludge discharge device 4 to the sludge tank 10, and the supernatant of the sludge tank flows out in an overflow manner.

The utility model provides an adopt small-size processing system of membrane aeration biofilm reactor of air stripping system to the regional development that is applicable to small-size equipment, utilizes its membrane aeration biomembrane subassembly can nitrify the denitrification in step, reduces the required aeration rate in the sewage treatment process greatly, and its mass transfer resistance is low simultaneously, energy consumption greatly reduced.

The reflux system and the sludge discharge system of the utility model both adopt an air stripping mode, thereby greatly reducing the configuration of electromechanical devices, reducing the volume and the occupied area, improving the applicability of small-size equipment and simultaneously reducing the operation and maintenance difficulty in the later period; the treatment efficiency is improved by arranging the gas stripping reflux device, and the energy consumption is reduced compared with the traditional reflux method and the sludge discharge method.

The utility model discloses a membrane aeration-biomembrane subassembly pond of modular, the combination in combination filler pond, can utilize the advantage that both are different, at first, the synchronous nitrification and denitrification through membrane aeration-biomembrane subassembly pond gets rid of TN, TP, COD, combine the combination filler pond again to react not thorough carrying out retreatment, if the water yield is big then can set up a plurality of membrane aeration-biomembrane subassembly ponds, the combination in combination filler pond is reinforceed and is handled, moreover, the steam generator is simple in structure, can reduce the equipment preparation degree of difficulty by a wide margin, shorten the manufacturing time, reduce area simultaneously.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing 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 present invention.

Claims

1. The sewage treatment device is characterized by comprising a membrane aeration-biological membrane component tank, a combined filler tank and an inclined plate sedimentation tank which are sequentially communicated, wherein the rear side of the inclined plate sedimentation tank is also provided with an air stripping sludge discharge device and an air stripping reflux device.

2. The sewage treatment device according to claim 1, wherein the membrane aeration-biological membrane component is arranged in the membrane aeration-biological membrane component tank, and the combined filler is arranged in the combined filler tank.

3. The wastewater treatment apparatus according to claim 1, wherein the membrane aeration-biofilm assembly tank is provided in plurality, and a water inlet is provided in a first one of the membrane aeration-biofilm assembly tanks.

4. The wastewater treatment plant according to claim 3, wherein the adjacent membrane aeration-biofilm component tanks are separated from each other and the combined filling tank is separated from each other by a partition.

5. The wastewater treatment plant according to claim 4, wherein the membrane aeration-biofilm assembly tank communicates with the bottom of the combined packing tank.

6. The wastewater treatment apparatus according to claim 4, wherein a cover plate is provided between the membrane aeration-biofilm assembly and the tank wall and between the membrane aeration-biofilm assembly and the partition plate.

7. The wastewater treatment apparatus according to claim 3, wherein the flow direction of the water flow between each membrane aeration-biofilm assembly tank is S-shaped.

8. The wastewater treatment plant according to claim 1, wherein a water stream overflows into the inclined plate sedimentation tank from the top of the combined filler tank.

9. The sewage treatment device according to claim 1, wherein the gas stripping sludge discharge device is arranged between the bottom of the inclined plate sedimentation tank and a sludge tank, the designed water level of the sludge tank is higher than that of the inclined plate sedimentation tank, and a water outlet is arranged on the inclined plate sedimentation tank.

10. The wastewater treatment plant according to claim 1, wherein the air stripping sludge discharge device is an air lifter, and the air stripping reflux device is arranged between the inclined plate sedimentation tank and the membrane aeration-biological membrane assembly tank.