System for reducing generation of concentrated solution in sewage treatment

Abstract

The utility model discloses a system for reducing concentrated solution generation in sewage treatment, and belongs to the technical field of sewage treatment.The system comprises a membrane equipment cleaning workshop, a three-way pipe is fixedly connected to one side of the membrane equipment cleaning workshop, and the two ends of the three-way pipe are connected with a concentrated solution pool and a sedimentation pool respectively; the side, away from the membrane equipment cleaning workshop, of the sedimentation tank is connected with a biochemical tank through a connecting pipe, an activated sludge assembly is arranged on the inner side of the biochemical tank, membrane equipment is fixedly connected to one side of the biochemical tank, a circulating pipeline is fixedly connected to one side of the membrane equipment, and the tail end of the circulating pipeline is connected with the membrane equipment cleaning workshop. According to the application, the concentrated solution and the flushing wastewater are respectively introduced into the concentrated solution tank and the sedimentation tank by arranging the three-way pipe and then enter the biochemical tank, and after activated sludge and flushing water flow back in the biochemical tank, the hydraulic retention time can be prolonged, so that a part of organic matters are decomposed, membrane equipment is arranged behind the biochemical tank, and salt and the like in the flushing water are intercepted; a part of reclaimed water is generated, and concentrated liquid is reduced.

Description

Technical Field

[0001] This application relates to the technical field of sewage treatment, and particularly relates to a system for reducing the generation of concentrated liquid in sewage treatment. Background Art

[0002] The treatment of the concentrated liquid generated by the current sewage station restricts the daily sewage treatment capacity of the sewage treatment station. The concentrated liquid is mainly generated in two parts: First, the sewage concentrated during the operation of the membrane equipment; Second, the flushing water used when the membrane equipment stops operating. Currently, the way for manufacturers to treat the concentrated liquid is to spray it back into the incinerator for incineration, but an excessive amount of backspray affects waste incineration and is not conducive to waste incineration power generation.

[0003] Due to the enrichment of a large amount of refractory organic matter, inorganic matter, and trace heavy metals, the concentrated liquid has become a major difficult problem to treat. In the current industry, the treatment method for the concentrated liquid is evaporation and concentration, but the treatment energy consumption is quite large, and it is easy to scale, resulting in a high treatment cost. Although the concentrated liquid can be sprayed into the waste incinerator for treatment, if the spraying amount is too large, it will affect waste combustion and reduce the heat generated by the waste.

[0004] In view of the current situation, through the implementation of the present invention, the generation amount of the concentrated liquid is reduced. Utility Model Content

[0005] A system for reducing the generation of concentrated liquid in sewage treatment proposed in this application aims to solve the problems raised in the above background art.

[0006] In order to achieve the above object, this application adopts the following technical solutions:

[0007] A system for reducing the generation of concentrated liquid in sewage treatment includes a membrane equipment cleaning workshop. One side of the membrane equipment cleaning workshop is fixedly connected with a three-way pipe. The two ends of the three-way pipe are respectively connected with a concentrated liquid tank and a sedimentation tank. The side of the sedimentation tank away from the membrane equipment cleaning workshop is fixedly connected with a connecting pipe. The end of the connecting pipe is fixedly connected with a biochemical tank. An activated sludge component is arranged inside the biochemical tank. One side of the biochemical tank is fixedly connected with a membrane equipment. One side of the membrane equipment is fixedly connected with a circulation pipeline. A circulation pump is fixedly installed on the circulation pipeline. The end of the circulation pipeline is connected with the water inlet end of the membrane equipment cleaning workshop.

[0008] By adopting the above technical solution, the concentrated liquid and the flushing wastewater are respectively introduced into the concentrated liquid tank and the sedimentation tank through a three-way pipe, and then the flushing wastewater sequentially passes through the sedimentation in the sedimentation tank and the sedimentation and reaction in the biochemical tank, and is filtered again through a reverse osmosis membrane. Finally, the filtered flushing wastewater is introduced into the membrane equipment cleaning workshop again through a circulation pipeline by a circulation pump for reuse, so as to realize the recycling of the flushing wastewater, effectively reduce the generation amount of the concentrated liquid, and reduce the amount of the concentrated liquid returned to the waste incinerator, thereby increasing the heat generation of the garbage, recovering 80% of the reclaimed water, and increasing the generation amount of the reclaimed water.

[0009] As a preferred embodiment, the activated sludge assembly includes a first limiting frame and a second limiting frame fixedly installed in sequence from top to bottom. An activated sludge and a stirring mechanism are arranged between the first limiting frame and the second limiting frame. A first sludge discharge port and a second sludge discharge port are respectively formed at the lower ends of the first limiting frame and the second limiting frame on one side of the biochemical tank.

[0010] By adopting the above technical solution, after the flushing wastewater enters the biochemical tank, there is activated sludge in the biochemical tank. After the flushing water returns, the hydraulic retention time can be increased, so as to decompose part of the organic matter. The first sludge discharge port and the second sludge discharge port can be used to discharge the inactivated sludge.

[0011] As a preferred embodiment, the stirring mechanism includes a stirring shaft. A plurality of stirring blades are fixedly installed on the outer wall of the stirring shaft along the circumferential direction. A driving motor is fixedly installed on the outer wall of the biochemical tank. The output shaft of the driving motor is fixedly connected with the stirring shaft through a coupling.

[0012] By adopting the above technical solution, the driving motor drives the stirring shaft to rotate, and the stirring shaft then drives the stirring blades to stir the flushing wastewater, so that the flushing wastewater reacts more fully with the activated sludge, the hydraulic retention time can be increased, and part of the organic matter can be decomposed.

[0013] As a preferred embodiment, a plurality of vertical baffles are arranged inside the sedimentation tank, and the height of the baffles gradually decreases along the water flow direction.

[0014] By adopting the above technical solution, after the flushing water enters the inside of the sedimentation tank through the connecting pipe, it sequentially passes through a plurality of baffles. The plurality of arranged baffles divide the sedimentation tank into a plurality of sedimentation tanks. When the water level in the previous sedimentation tank rises to a certain height, it enters the next sedimentation tank, realizing multiple sedimentations of the flushing wastewater and better sedimentation effect.

[0015] As a preferred embodiment, a plurality of slag discharge branch pipes are fixedly connected to the bottom of the sedimentation tank, and the ends of the slag discharge branch pipes are fixedly connected to the same slag discharge main pipe. The end of the slag discharge main pipe is connected to the concentrated liquid tank.

[0016] By adopting the above technical solution, the slag discharge branch pipes can collect the precipitated waste residues into the same main slag discharge pipe, and export and collect them to reduce the generation amount of the concentrated liquid.

[0017] As a preferred embodiment, a flow guide plate is provided at the bottom of the biochemical tank, and a reverse osmosis membrane is fixedly installed on one side of the membrane device close to the flow guide plate.

[0018] By adopting the above technical solution, the flow guide plate helps to introduce the filtered wastewater into the membrane device, and the reverse osmosis membrane can filter it again, so that when the flushing wastewater enters the circulation process, the possibility of blocking the reverse osmosis membrane elements in the membrane device cleaning workshop is greatly reduced, thus saving the cost of repairing the equipment.

[0019] The beneficial effects of the present application:

[0020] The system for reducing the generation of concentrated liquid in a sewage treatment reduces the generation amount of concentrated liquid by setting a tee, a concentrated liquid tank and a sedimentation tank. The concentrated liquid and the flushing wastewater are respectively introduced into the concentrated liquid tank and the sedimentation tank through the tee, and then the flushing wastewater sequentially passes through the precipitation in the sedimentation tank and the precipitation and reaction in the biochemical tank. There is activated sludge in the biochemical tank. After the flushing water returns, the hydraulic retention time can be increased, so as to decompose part of the organic matter. After the biochemical tank is the membrane device, which intercepts salts and the like in the flushing water, generates a part of reclaimed water, reduces the concentrated liquid, and finally the filtered flushing wastewater is introduced into the membrane device cleaning workshop again through the circulation pipeline by the circulation pump for use, so as to realize the recycling of the flushing wastewater, effectively reduce the generation amount of the concentrated liquid, and reduce the amount of concentrated liquid sprayed back into the waste incinerator, thereby increasing the heat generation of the garbage, recovering 80% of the reclaimed water, and increasing the generation amount of reclaimed water. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 It is a front view sectional view of the present application;

[0023] Figure 3 For the present application Figure 2 The enlarged schematic diagram at A in;

[0024] Reference numerals in the figure: 1. Membrane device cleaning workshop; 2. Tee; 3. Concentrated liquid tank; 4. Sedimentation tank; 41. Baffle; 42. Slag discharge branch pipe; 43. Main slag discharge pipe; 5. Connecting pipe; 6. Biochemical tank; 61. First sludge discharge port; 62. Second sludge discharge port; 7. Activated sludge assembly; 71. First limiting frame; 72. Second limiting frame; 8. Circulation pipeline; 9. Circulation pump; 10. Stirring mechanism; 101. Stirring shaft; 102. Stirring blade; 103. Driving motor; 11. Membrane device; 111. Reverse osmosis membrane; 12. Flow guide plate. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0026] Referring to Figures 1 - 3 , a system for reducing the generation of concentrated liquid in sewage treatment, including a membrane equipment cleaning workshop 1. One side of the membrane equipment cleaning workshop 1 is fixedly connected with a three-way pipe 2. The two ends of the three-way pipe 2 are respectively connected with a concentrated liquid tank 3 and a sedimentation tank 4. One side of the sedimentation tank 4 away from the membrane equipment cleaning workshop 1 is fixedly connected with a connecting pipe 5. The end of the connecting pipe 5 is fixedly connected with a biochemical tank 6. An activated sludge assembly 7 is arranged inside the biochemical tank 6. One side of the biochemical tank 6 is fixedly connected with a membrane equipment 11. One side of the membrane equipment 11 is fixedly connected with a circulating pipeline 8. A circulating pump 9 is fixedly installed on the circulating pipeline 8. The end of the circulating pipeline 8 is connected with the water inlet end of the membrane equipment cleaning workshop 1. The concentrated liquid and the flushing wastewater are respectively introduced into the concentrated liquid tank 3 and the sedimentation tank 4 through the three-way pipe 2. Then, the flushing wastewater passes through the precipitation of the sedimentation tank 4 and the precipitation and reaction of the biochemical tank 6 in sequence, and is filtered again through the reverse osmosis membrane 111. Finally, the filtered flushing wastewater is introduced into the membrane equipment cleaning workshop 1 again through the circulating pipeline 8 by the circulating pump 9 for use, so as to realize the recycling of the flushing wastewater, effectively reduce the generation amount of the concentrated liquid, and reduce the amount of the concentrated liquid returned to the waste incinerator, thereby increasing the heat generation of the garbage, recovering 80% of the reclaimed water, and increasing the generation amount of the reclaimed water.

[0027] Referring to Figure 2 , the activated sludge assembly 7 includes a first limit frame 71 and a second limit frame 72 fixedly installed in sequence from top to bottom. An activated sludge and a stirring mechanism 10 are arranged between the first limit frame 71 and the second limit frame 72. On one side of the biochemical tank 6, a first sludge discharge port 61 and a second sludge discharge port 62 are respectively opened at the lower ends of the first limit frame 71 and the second limit frame 72. After the flushing wastewater enters the biochemical tank 6, there is activated sludge in the biochemical tank 6. The driving motor 103 drives the stirring shaft 101 to rotate, and the stirring shaft 101 then drives the stirring blades 102 to stir the flushing wastewater, so that the flushing wastewater contacts the activated sludge more fully. After the flushing water flows back, the hydraulic retention time can be increased, thereby decomposing a part of the organic matter. The first sludge discharge port 61 and the second sludge discharge port 62 can be used to discharge the inactivated sludge.

[0028] Referring to Figure 2 and Figure 3, the stirring mechanism 10 includes a stirring shaft 101. A plurality of stirring blades 102 are fixedly installed on the outer wall of the stirring shaft 101 along the circumferential direction. A driving motor 103 is fixedly installed on the outer wall of the biochemical tank 6. The output shaft of the driving motor 103 is fixedly connected to the stirring shaft 101 through a coupling. The driving motor 103 drives the stirring shaft 101 to rotate, and the stirring shaft 101 then drives the stirring blades 102 to stir the flushing wastewater, making the reaction between the flushing wastewater and the flocculant more sufficient and the precipitation effect better.

[0029] Refer to Figure 2 , a plurality of vertical baffles 41 are provided inside the sedimentation tank 4. The height of the baffles 41 gradually decreases along the water flow direction. After the flushing water enters the inside of the sedimentation tank 4 through the connecting pipe, it passes through a plurality of baffles 41 in sequence. The plurality of arranged baffles 41 divide the sedimentation tank 4 into multiple sedimentation tanks. When the water level in the previous sedimentation tank rises to a certain height, it enters the next sedimentation tank, realizing multiple sedimentations of the flushing wastewater and achieving a better sedimentation effect.

[0030] Refer to Figure 1 , a plurality of slag discharge branch pipes 42 are fixedly connected to the bottom of the sedimentation tank 4. The ends of the slag discharge branch pipes 42 are fixedly connected to the same slag discharge main pipe 43. The end of the slag discharge main pipe 43 is connected to the concentrated liquid tank 3. The slag discharge branch pipes 42 can collect the precipitated waste residues into the same slag discharge main pipe 43, and export and collect them to reduce the generation amount of the concentrated liquid.

[0031] Refer to Figure 2 , a guide plate 12 is provided at the bottom of the biochemical tank 6. A reverse osmosis membrane 111 is fixedly installed on one side of the membrane device 11 close to the guide plate 12. The guide plate 12 helps to guide the filtered wastewater into the membrane device 11, and the reverse osmosis membrane 111 can filter it again. Thus, when the flushing wastewater enters the circulation process, the possibility of blocking the reverse osmosis membrane elements in the membrane device cleaning workshop 1 is greatly reduced, saving the cost of maintaining the equipment.

[0032] Working principle: The concentrated liquid and the flushing wastewater are respectively introduced into the concentrated liquid tank 3 and the sedimentation tank 4 through the tee pipe 2. Then, the flushing wastewater sequentially undergoes sedimentation in the sedimentation tank 4 and sedimentation and reaction in the biochemical tank 6, and is filtered again through the reverse osmosis membrane 111. Finally, the filtered flushing wastewater is introduced into the membrane equipment cleaning workshop 1 again through the circulation pipeline 8 by the circulation pump 9 for reuse, thereby realizing the recycling of the flushing wastewater. The specific process is as follows: Multiple baffles 41 divide the sedimentation tank 4 into multiple sedimentation tanks. When the water level in the previous sedimentation tank rises to a certain height, it enters the next sedimentation tank, realizing multiple sedimentations of the flushing wastewater and achieving a better sedimentation effect. There is activated sludge in the biochemical tank 6. The driving motor 103 drives the stirring shaft 101 to rotate, and the stirring shaft 101 then drives the stirring blades 102 to stir the flushing wastewater, making the flushing wastewater contact the activated sludge more fully. After the flushing water returns, the hydraulic retention time can be increased, thereby decomposing part of the organic matter. After the biochemical tank 6 is the membrane equipment 11, and the reverse osmosis membrane 111 can filter it again, intercepting salts and the like in the flushing water and generating a part of reclaimed water, reducing the concentrated liquid. Thus, when the flushing wastewater enters the circulation process, the possibility of blocking the reverse osmosis membrane elements in the membrane equipment cleaning workshop 1 is greatly reduced, thereby saving the cost of equipment maintenance.

[0033] In summary, it can effectively reduce the generation amount of the concentrated liquid, and reduce the amount of the concentrated liquid returned to the waste incinerator, thereby increasing the heat generation of the garbage, recovering 80% of the reclaimed water, and increasing the generation amount of the reclaimed water.

[0034] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and the inventive concept of the present application, makes equivalent substitutions or changes, and should be covered within the protection scope of the present application.

Claims

1. A system for reducing the generation of concentrated liquid in sewage treatment, including a membrane equipment cleaning workshop (1), characterized in that, One side of the membrane equipment cleaning workshop (1) is fixedly connected with a tee pipe (2). The two ends of the tee pipe (2) are respectively connected with a concentrated liquid tank (3) and a sedimentation tank (4). One side of the sedimentation tank (4) far from the membrane equipment cleaning workshop (1) is fixedly connected with a connecting pipe (5). The end of the connecting pipe (5) is fixedly connected with a biochemical tank (6). An activated sludge assembly (7) is arranged inside the biochemical tank (6). One side of the biochemical tank (6) is fixedly connected with a membrane equipment (11). One side of the membrane equipment (11) is fixedly connected with a circulation pipeline (8). A circulation pump (9) is fixedly installed on the circulation pipeline (8). The end of the circulation pipeline (8) is connected with the water inlet end of the membrane equipment cleaning workshop (1).

2. The system for reducing the generation of concentrated liquid in sewage treatment according to claim 1, wherein The activated sludge assembly (7) includes a first limit frame (71) and a second limit frame (72) fixedly installed in sequence from top to bottom. An activated sludge and a stirring mechanism (10) are arranged between the first limit frame (71) and the second limit frame (72). On one side of the biochemical tank (6), a first sludge discharge port (61) and a second sludge discharge port (62) are respectively opened at the lower ends of the first limit frame (71) and the second limit frame (72).

3. A system for reducing the generation of concentrated liquid in sewage treatment according to claim 2, characterized in that, The stirring mechanism (10) includes a stirring shaft (101). A plurality of stirring blades (102) are fixedly installed on the outer wall of the stirring shaft (101) along the circumferential direction. A driving motor (103) is fixedly installed on the outer wall of the biochemical tank (6). The output shaft of the driving motor (103) is fixedly connected with the stirring shaft (101) through a coupling.

4. A system for reducing the generation of concentrated liquid in sewage treatment according to claim 1, characterized in that, A plurality of vertical baffles (41) are arranged inside the sedimentation tank (4). The height of the baffles (41) gradually decreases along the water flow direction.

5. A system for reducing the generation of concentrated liquid in sewage treatment according to claim 1, characterized in that, A plurality of slag discharge branch pipes (42) are fixedly connected to the bottom of the sedimentation tank (4). The ends of the slag discharge branch pipes (42) are fixedly connected with the same slag discharge main pipe (43). The end of the slag discharge main pipe (43) is connected with the concentrated liquid tank (3).

6. The system for reducing the generation of concentrated liquid in sewage treatment according to claim 1, characterized in that, A flow guide plate (12) is arranged at the bottom of the biochemical tank (6). A reverse osmosis membrane (111) is fixedly installed on one side of the membrane equipment (11) close to the flow guide plate (12).

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