CN114804506A

CN114804506A - Full-membrane treatment method for urban sewage

Info

Publication number: CN114804506A
Application number: CN202210264659.2A
Authority: CN
Inventors: 张立军; 刘克成; 曾四鸣; 郁金星; 石荣雪; 王颖楠
Original assignee: Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd; State Grid Hebei Energy Technology Service Co Ltd; State Grid Corp of China SGCC
Current assignee: Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd; State Grid Hebei Energy Technology Service Co Ltd; State Grid Corp of China SGCC
Priority date: 2022-03-17
Filing date: 2022-03-17
Publication date: 2022-07-29

Abstract

The invention discloses a full-film treatment method for urban sewage, comprising the following steps: Step 1, discharging urban sewage into a sedimentation tank of a treatment tank through a sewage discharge pipe for sedimentation; Treatment in the treatment tank, dehydration treatment of the mud in the sedimentation tank; step 3, adding chemicals to the sewage treated in the biological treatment tank for coagulation and sedimentation, and after filtration, sterilized water; step 4, using the connecting pipe to flow the sterilized sewage into the The membrane bioreactor realizes deep purification of sewage; step 5, the dewatered mud is landfilled; step 6, the water purified in step 4 is sent to the reverse osmosis water treatment equipment, and the reverse osmosis water treatment equipment will A large amount of impurities mixed into the water are all isolated. The urban sewage full membrane treatment method improves the sewage treatment effect, can remove most of the heavy metals in the water, and achieve the purpose of softening the water quality, and the membrane bioreactor can realize the deep purification of the sewage.

Description

Full-membrane treatment method for urban sewage

Technical Field

The invention relates to the relevant field of municipal sewage treatment, in particular to a full-membrane treatment method for municipal sewage.

Background

The urban sewage is generally collected by urban pipelines and is discharged into a water body after being treated by an urban sewage treatment plant. In addition to containing a large amount of organic matters, germs and viruses in urban sewage, due to the advanced development of industry, the water quality of industrial wastewater (accounting for about 60-80% of the total amount of the urban sewage) is increasingly complex, and the pollution of runoff sewage is increasingly serious, so that the urban sewage contains various toxic and harmful pollutants of various types and degrees.

For example, chinese patent 201310654721.X discloses a process for sewage treatment, which specifically discloses a process for sewage treatment, wherein 1000mL of water sample is taken, lime emulsion is added and stirred, coagulant is added and stirred, then PAM solution is added and stirred and then settled and separated, 900mL of supernatant is taken, after being oxidized by KMn04, medicine is added and coagulated, and the supernatant is taken for filtration and activated carbon adsorption. The invention has simple process and small occupied area of equipment, and is more economic and reasonable compared with other domestic sewage treatment methods.

For example, chinese patent 201210489896.5 discloses a sewage treatment method, which specifically discloses the technical field of environmental protection, specifically a sewage treatment method, specifically comprising the following steps: inputting sewage into a mechanical grid, enabling the sewage passing through the mechanical grid to enter a water collecting adjusting tank, inputting the sewage in the water collecting adjusting tank into a sewage cooling tower, inputting the sewage cooled by the cooling tower into a coagulating sedimentation tank, enabling the sewage subjected to coagulating sedimentation to enter a CASS (cyclic activated sludge system) tank, and enabling the sewage subjected to CASS tank treatment to pass through a biological filter tank to finally obtain the water subjected to treatment.

The treatment of urban sewage relates to many aspects, a sewer system, the position and treatment process of a sewage treatment plant, the utilization and discharge requirements of the treated sewage and the like are comprehensively planned, the whole membrane treatment of the urban sewage is a novel water treatment technology combining a membrane separation unit and a biological treatment unit, and a membrane component is used for replacing a terminal secondary sedimentation tank of the traditional biological treatment technology.

However, most of the existing full-membrane treatment methods have poor treatment effects, cannot remove heavy metals in water, cannot remove impurities in sewage, cannot meet the requirements of sewage recycling, and have defects, however, the above-mentioned published patents still cannot effectively remove organic matters in municipal sewage and solve the problem of resource utilization of sludge in the sewage treatment process, so that there is a need to provide a municipal sewage treatment method of the full-membrane treatment method for municipal sewage.

Disclosure of Invention

The invention aims to provide a full-membrane treatment method for urban sewage, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a full membrane treatment method for urban sewage comprises the following steps:

step 1, discharging urban sewage into a sedimentation tank of a treatment tank through a sewage discharge pipe for sedimentation;

step 2, discharging the sewage in the sedimentation tank after a period of sedimentation into a biological treatment tank for treatment, and dehydrating the slurry in the sedimentation tank;

step 3, adding medicine into the sewage treated by the biological treatment tank for coagulating sedimentation, and disinfecting and discharging water after filtering;

step 4, utilizing a connecting pipe to flow the disinfected sewage into a membrane bioreactor to realize deep purification of the sewage;

step 5, burying the dehydrated slurry;

step 6, sending the water purified in the step 4 to reverse osmosis water treatment equipment, wherein the reverse osmosis water treatment equipment completely isolates a large amount of impurities mixed in the water;

step 7, leading out the treated water;

the membrane bioreactor used in the urban sewage full-membrane treatment method comprises a shell, a partition board is fixedly connected in the shell and divides the shell into a first membrane bioreactor treatment cavity and a second membrane bioreactor treatment cavity, the first membrane bioreactor treatment cavity and the second membrane bioreactor treatment cavity are both rotatably connected with a rotating rod, one end of the rotating rod penetrates through the shell and extends outwards, an installation frame is fixedly connected on the outer side wall of the shell, a double-shaft motor is arranged in the installation frame, the output end of the double-shaft motor is fixedly connected with a shaft rod, one end of the shaft rod is fixedly connected with a first gear, one side of the first gear is provided with a second gear which is meshed with the first gear, the second gear is fixedly connected with the rotating rod, a stirring belt is fixedly connected on the side wall of the rotating rod in the shell, and one end of the rotating rod is fixedly sleeved with a driving wheel, one side of action wheel is equipped with from the driving wheel, the action wheel is connected through the connecting band with from between the driving wheel, fixed inserting is equipped with the connecting rod from the driving wheel, the connecting rod rotates with shells inner wall to be connected, the fixed cover of one end of connecting rod connects the cam, all be equipped with the recess on a membrane bioreactor process chamber and No. two membrane bioreactor process chamber lateral walls, fixedly connected with bracing piece in the recess, the connecting block has been cup jointed in the slip on the bracing piece, fixedly connected with spring between one side of connecting block and the recess inner wall, the one end fixedly connected with cavity section of thick bamboo of connecting block, be equipped with the filter screen in the cavity section of thick bamboo, the one end fixedly connected with of cavity section of thick bamboo is supported the clamp plate, the one end of cam contacts with supporting the clamp plate.

Preferably, the top of the two ends of the filter screen is fixedly connected with a locking block, the outer walls of the two sides of the hollow cylinder are fixedly connected with vertical plates, a positioning rod is slidably inserted on the vertical plates, and one side of the locking block is provided with a positioning groove corresponding to the positioning rod.

Preferably, an opening is formed in the shell, a bearing is fixedly connected in the opening, and the rotating rod is fixedly inserted in the bearing.

Preferably, one side of the shell is provided with a water inlet, and one side of the shell, which is far away from the water inlet, is provided with a water outlet.

Preferably, one end of the positioning rod is fixedly sleeved with a limiting sleeve.

Preferably, one end of the partition board is provided with a mounting port, and a water pump is fixedly connected in the mounting port.

Preferably, the two-shaft motor is of the type JGY 370.

Preferably, the first gear and the second gear are both bevel gears.

Compared with the prior art, the invention has the beneficial effects that:

the urban sewage full-membrane treatment method improves the sewage treatment effect, can remove most heavy metals in water to achieve the purpose of softening water quality, can realize deep purification of sewage by the membrane bioreactor, can remove most impurities in the sewage while stirring the sewage by the stirring blades, ensures the normal working condition of the biofilm reactor, and prolongs the service life of the biofilm reactor.

Drawings

FIG. 1 is a schematic structural diagram of a membrane bioreactor of a whole membrane treatment method for municipal sewage according to the present invention;

FIG. 2 is a schematic view of the structure inside the hollow cylinder of FIG. 1 according to the method for treating urban sewage by a whole membrane of the present invention;

FIG. 3 is an enlarged view of the portion A of FIG. 1 illustrating a membrane-based method for treating municipal wastewater according to the present invention;

FIG. 4 is an enlarged view of FIG. 2B of the membrane treatment method for municipal sewage according to the present invention;

FIG. 5 is a system diagram of a membrane treatment method for municipal sewage according to the present invention.

In the figure: 1. a housing; 2. a partition plate; 3. a first membrane bioreactor treatment chamber; 4. a second membrane bioreactor treatment cavity; 5. a rotating rod; 6. a mounting frame; 7. a double-shaft motor; 8. a shaft lever; 9. a first gear; 10. a second gear; 11. a stirring belt; 12. a driving wheel; 13. a driven wheel; 14. a connecting belt; 15. a connecting rod; 16. a cam; 17. a support bar; 18. connecting blocks; 19. a spring; 20. a hollow cylinder; 21. filtering with a screen; 22. pressing the plate; 23. a locking block; 24. a vertical plate; 25. positioning a rod; 26. a bearing; 27. a limiting sleeve; 28. and (4) a water pump.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is described in the embodiments of the application with the following combination of the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may 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. Also, when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "fixedly attached" to another element, it can be fixedly attached by welding, bolting, gluing, or the like. In conclusion, the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1-5, an embodiment of the present invention is shown: a full membrane treatment method for urban sewage comprises the following steps:

step 5, burying the dehydrated slurry;

step 7, leading out the treated water;

the membrane bioreactor used in the urban sewage full-membrane treatment method comprises a shell 1, a partition plate 2 is fixedly connected in the shell 1, the shell 1 is divided into a first membrane bioreactor treatment cavity 3 and a second membrane bioreactor treatment cavity 4 by the partition plate 2, a rotating rod 5 is rotatably connected in the first membrane bioreactor treatment cavity 3 and the second membrane bioreactor treatment cavity 4, one end of the rotating rod 5 penetrates through the shell 1 and extends outwards, a mounting frame 6 is fixedly connected on the outer side wall of the shell 1, a double-shaft motor 7 is arranged in the mounting frame 6, the output end of the double-shaft motor 7 is fixedly connected with a shaft lever 8, one end of the shaft lever 8 is fixedly connected with a first gear 9, one side of the first gear 9 is provided with a second gear 10 which is meshed with each other, the second gear 10 is fixedly connected with the rotating rod 5, a stirring belt 11 is fixedly connected on the side wall of the rotating rod 5 which is positioned in the shell 1, and a driving wheel 12 is fixedly sleeved at one end of the rotating rod 5, one side of a driving wheel 12 is provided with a driven wheel 13, the driving wheel 12 is connected with the driven wheel 13 through a connecting belt 14, a connecting rod 15 is fixedly inserted on the driven wheel 13, the connecting rod 15 is rotatably connected with the inner wall of the shell 1, one end of the connecting rod 15 is fixedly sleeved with a cam 16, the side walls of the first membrane bioreactor processing cavity 3 and the second membrane bioreactor processing cavity 4 are respectively provided with a groove, a supporting rod 17 is fixedly connected in the groove, the supporting rod 17 is slidably sleeved with a connecting block 18, a spring 19 is fixedly connected between one side of the connecting block 18 and the inner wall of the groove, one end of the connecting block 18 is fixedly connected with a hollow cylinder 20, a filter screen 21 is arranged in the hollow cylinder 20, one end of the hollow cylinder 20 is fixedly connected with a pressing plate 22, one end of the cam 16 is contacted with the pressing plate 22, specifically, the two-end shaft levers 8 can be driven to rotate by starting a double-shaft motor 7, at the moment, a first gear 9 arranged on the shaft lever 8 is meshed with a second gear 10 so as to realize the rotation of the rotating lever 5 in the shell 1, utilize stirring area 11 of 5 on the bull stick to stir sewage, can place the active carbon granule on the filter screen 21 to on the cavity section of thick bamboo 20 inside at the in-process of stirring, it can effectively adsorb impurity to add the active carbon granule in the stirring in-process in step, the action wheel 12 on the bull stick 5 will utilize connecting band 14 to make to rotate from driving wheel 13 simultaneously, install connecting rod 15 on driving wheel 13 this moment and will drive cam 16 rotatory, cam 16 laminates and supports clamp plate 22 and drive cavity section of thick bamboo 20 motion, cavity section of thick bamboo 20 utilizes connecting block 18 compression spring, with this reciprocating type cavity section of thick bamboo 20 that utilizes cam 16 produces the vibration, shake the material effectively to avoid blockking up to the active carbon granule.

In this embodiment, the housing 1 is provided with an opening, the opening is fixedly connected with a bearing 26, and the rotating rod 5 is fixedly inserted into the bearing 26 to stably support the rotating rod 5; a water inlet is formed in one side of the shell 1, and a water outlet is formed in one side, far away from the water inlet, of the shell 1; one end of the clapboard 2 is provided with a mounting port, and a water pump 28 is fixedly connected in the mounting port; the model of the double-shaft motor 7 is JGY 370; the first gear 9 and the second gear 10 are both bevel gears.

The working principle is as follows: the sewage treatment device comprises a sewage discharge pipe, a treatment tank sedimentation tank, a biological treatment tank, a membrane bioreactor, a connecting pipe, a reverse osmosis water treatment device, a sewage discharge pipe, a sewage discharge pipe discharge a sewage discharge pipe, a biological treatment pipe discharge a sewage discharge pipe, a sewage discharge pipe discharge a sewage discharge pipe discharge a sewage discharge pipe discharge a sewage discharge pipe discharge a sewage discharge pipe discharge a sewage discharge pipe discharge sewage discharge pipe discharge a sewage discharge pipe discharge a sewage discharge pipe discharge sewage discharge pipe discharge sewage discharge pipe discharge sewage discharge pipe.

Example 2

Please refer to fig. 4, which is a preferred embodiment of the present invention, and has the implementation contents of the above embodiment, wherein, for the specific implementation of the above embodiment, the above description is referred to, and the embodiment herein is not repeated in detail; in the embodiment of the present application, the difference from the above embodiment is:

in this embodiment, the tops of both ends of the filter screen 21 are fixedly connected with locking blocks 23, the outer walls of both sides of the hollow cylinder 20 are fixedly connected with vertical plates 24, positioning rods 25 are slidably inserted on the vertical plates 24, and positioning grooves corresponding to the positioning rods 25 are arranged on one side of the locking blocks 23; specifically, the sliding positioning rod 25 is inserted into the positioning groove in the locking block 23, so that the filter screen 21 is convenient to disassemble and assemble, and the traditional screw fixing mode is replaced, so that the operation is more convenient and faster during later cleaning, overhauling or replacement; one end of the positioning rod 25 is fixedly sleeved with a limiting sleeve 27 to prevent the positioning rod 25 from falling off.

Example 3

Please refer to fig. 5, which is another preferred embodiment of the present invention, which has the implementation contents of the above embodiment, wherein, for the specific implementation of the above embodiment, the above description is referred to, and the embodiment herein is not repeated in detail; in the embodiment of the present application, the difference from the above embodiment is:

in this embodiment, the liquid medicine in step 3 is a flocculant, and includes 2 to 10 parts of a polyvinyl alcohol solution, 67 parts of a high-density particle powder, and 50 parts of an inorganic flocculant fine powder.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A full membrane treatment method for urban sewage is characterized in that: the method comprises the following steps:

step 5, burying the dehydrated slurry;

and 7, leading out the treated water.

2. The full membrane treatment method for municipal sewage according to claim 1, wherein the method comprises the following steps: the membrane bioreactor used in the urban sewage full-membrane treatment method comprises a shell (1), a partition plate (2) is fixedly connected in the shell (1), the shell (1) is divided into a first membrane bioreactor treatment cavity (3) and a second membrane bioreactor treatment cavity (4) by the partition plate (2), a rotating rod (5) is rotatably connected in each of the first membrane bioreactor treatment cavity (3) and the second membrane bioreactor treatment cavity (4), one end of the rotating rod (5) penetrates through the shell (1) and extends outwards, an installation frame (6) is fixedly connected on the outer side wall of the shell (1), a double-shaft motor (7) is arranged in the installation frame (6), the output end of the double-shaft motor (7) is fixedly connected with a shaft lever (8), one end of the shaft lever (8) is fixedly connected with a first gear (9), one side of the first gear (9) is provided with a second gear (10) which is meshed with the first gear, the membrane bioreactor is characterized in that the second gear (10) is fixedly connected with the rotating rod (5), the rotating rod (5) is located on the side wall of the shell (1) and is fixedly connected with a stirring belt (11), one end of the rotating rod (5) is fixedly sleeved with a driving wheel (12), one side of the driving wheel (12) is provided with a driven wheel (13), the driving wheel (12) is connected with the driven wheel (13) through a connecting belt (14), the driven wheel (13) is fixedly inserted with a connecting rod (15), the connecting rod (15) is rotatably connected with the inner wall of the shell (1), one end of the connecting rod (15) is fixedly sleeved with a cam (16), the side walls of the first membrane bioreactor processing cavity (3) and the second membrane bioreactor processing cavity (4) are both provided with grooves, a supporting rod (17) is fixedly connected in each groove, and a connecting block (18) is sleeved on each supporting rod (17) in a sliding manner, fixedly connected with spring (19) between one side of connecting block (18) and the recess inner wall, the one end fixedly connected with cavity section of thick bamboo (20) of connecting block (18), be equipped with filter screen (21) in cavity section of thick bamboo (20), the one end fixedly connected with of cavity section of thick bamboo (20) supports clamp plate (22), the one end of cam (16) contacts with supporting clamp plate (22).

3. The full membrane treatment method for municipal sewage according to claim 2, wherein: the equal fixedly connected with latch segment (23) in both ends top of filter screen (21), equal fixedly connected with riser (24) on the both sides outer wall of cavity section of thick bamboo (20).

4. The full membrane treatment method for municipal sewage according to claim 3, wherein: a positioning rod (25) is slidably inserted in the vertical plate (24), and a positioning groove corresponding to the positioning rod (25) is formed in one side of the locking block (23).

5. The full membrane treatment method for municipal sewage according to claim 2, wherein: the shell (1) is provided with an opening, a bearing (26) is fixedly connected in the opening, and the rotating rod (5) is fixedly inserted in the bearing (26).

6. The full membrane treatment method for municipal sewage according to claim 2, wherein: a water inlet is formed in one side of the shell (1), and a water outlet is formed in one side, far away from the water inlet, of the shell (1).

7. The full membrane treatment method for municipal sewage according to claim 4, wherein: and one end of the positioning rod (25) is fixedly sleeved with a limiting sleeve (27).

8. The full membrane treatment method for municipal sewage according to claim 2, wherein: one end of the partition board (2) is provided with a mounting opening, and a water pump (28) is fixedly connected in the mounting opening.

9. The full membrane treatment method for municipal sewage according to claim 2, wherein: the model of the double-shaft motor (7) is JGY 370.

10. The full membrane treatment method for municipal sewage according to claim 2, wherein: the first gear (9) and the second gear (10) are both bevel gears.