Sewage pretreatment system capable of switching operation modes

Abstract

According to the sewage pretreatment system capable of switching the operation modes, the operation modes are adjusted according to the inlet water quality at different time periods, so that the change of the inlet water quality is met, the sewage treatment effect is improved, the subsequent advanced treatment of the system is ensured, and meanwhile, the occupied area is saved. An outlet of the fine grid water inlet channel is connected with an inlet of the fine grid water outlet channel through the fine grid communicating channel, and the fine grid water inlet gate valve and the fine grid are installed on the fine grid communicating channel. The fine grid water outlet channel is provided with two outlets, one outlet is connected with an inlet of the mixing pool module, a first electric gate valve is installed on the outlet, the other outlet is connected with an inlet of the grit chamber water inlet channel, and a second electric gate valve is installed on the outlet; an outlet of the mixing tank module is connected with an inlet of the grit chamber water inlet channel, and an electric gate valve III is mounted on the outlet of the mixing tank module; an outlet of the grit chamber water inlet channel is connected with an inlet of the multifunctional tank, and an electric gate valve IV is mounted on the outlet of the grit chamber water inlet channel; an outlet of the multifunctional pool is connected with an inlet of the water outlet channel.

Description

Technical Field

[0001] The utility model relates to a sewage pretreatment system with switchable operation modes. Background Art

[0002] Wastewater from industrial parks is generally collected through pipe networks and sent to the park's sewage treatment plant for centralized treatment. However, due to the large number of industrial enterprises in the park, their production processes and drainage times are different, which leads to a wide variety of wastewater, a wide range of pollution, and great differences in sewage concentration at different times. The existing sewage pretreatment system has a relatively simple operation mode, resulting in poor sewage treatment effects. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a sewage pretreatment system with a reasonably designed structure and switchable operating modes. The operating mode can be adjusted according to the influent water quality at different time periods to meet the changes in the influent water quality, improve the sewage treatment effect, ensure the subsequent deep treatment of the system, and save floor space at the same time.

[0004] The technical solution adopted by the utility model to solve the above problems is: a sewage pretreatment system with switchable operation modes, characterized in that: it includes a fine grid water inlet channel, a fine grid water inlet gate valve, a fine grid, a fine grid water outlet channel, an electric gate valve 1, an electric gate valve 2, an electric gate valve 3, an electric gate valve 4, a mixing tank module, a sand settling tank water inlet channel, a multifunctional tank and a water outlet channel; the outlet of the fine grid water inlet channel is connected to the inlet of the fine grid water outlet channel through a fine grid connecting channel, and the fine grid water inlet gate valve and the fine grid are installed on the fine grid connecting channel; the fine grid The screen outlet channel is provided with two outlets, one of which is connected with the inlet of the mixing tank module, on which an electric gate valve 1 is installed, and the other is connected with the inlet of the grit tank inlet channel, on which an electric gate valve 2 is installed; the outlet of the mixing tank module is connected with the inlet of the grit tank inlet channel, on which an electric gate valve 3 is installed; the outlet of the grit tank inlet channel is connected with the inlet of the multi-functional tank, on which an electric gate valve 4 is installed; the outlet of the multi-functional tank is connected with the inlet of the outlet channel.

[0005] The fine grid communication channels described in the utility model are multiple and arranged side by side.

[0006] The mixing tank module described in the utility model is mainly composed of mixing tank one, mixing tank two and mixing tank three. One of the outlets of the fine grid outlet channel is connected to the inlet of mixing tank one, the outlet of mixing tank one is connected to the inlet of mixing tank two, the outlet of mixing tank two is connected to the inlet of mixing tank three, and the outlet of mixing tank three is connected to the inlet of the sand settling tank inlet channel.

[0007] The first mixing tank, the second mixing tank and the third mixing tank described in the utility model are all equipped with a stirrer.

[0008] The utility model has an electric gate valve five installed on the outlet of the multifunctional pool.

[0009] The multifunctional pool of the utility model is equipped with an air lift system.

[0010] The utility model also includes a sludge storage tank, a sand-water separation system, an air lift sludge discharge branch pipe, an electric valve 1, an electric valve 2 and a tee pipe; the first opening of the tee pipe is connected to the air lift sludge discharge branch pipe through the electric valve 1, the second opening is connected to the sand-water separation system through the electric valve 2, and the third opening is connected to the air lift system; the sludge storage tank is connected to the air lift sludge discharge branch pipe.

[0011] A submersible sewage pump is installed in the sludge storage tank of the utility model.

[0012] The sludge storage tank described in the utility model is arranged on one side of the mixing tank module.

[0013] The multifunctional pool of the utility model is equipped with a slag skimming pipe system, an aeration system and a mud scraping system.

[0014] Compared with the prior art, the utility model has the following advantages and effects: the utility model can realize different pretreatment functions according to the changes in the content of influent COD, SS and inorganic sand particles through the flexible switching of each electric gate valve to meet the changes in influent load and improve the sewage treatment effect, and the operation is stable and reliable, and the operation is simple. At the same time, the system solves the problem of the shortage of construction land for existing park sewage treatment plants to a certain extent, so as to save land investment costs and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the planar structure of an embodiment of the utility model.

[0016] Figure 2 It is a side structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0018] The embodiment of the utility model includes a fine grid water inlet channel 1, a fine grid water inlet gate valve 2, a fine grid 3, a fine grid water outlet channel 4, an electric gate valve 1 5, a mixing tank module, a sludge storage tank 9, an electric gate valve 2 10, an electric gate valve 3 11, a sand settling tank water inlet channel 12, an electric gate valve 4 13, an air lift system 14, a multi-functional tank 15, a slag skimming pipe system 16, an electric gate valve 5 17, a water outlet channel 18, a sand and water separation system 19, an aeration system 20, a submersible sewage pump 21, a sludge scraping system 22, an air lift sludge discharge branch pipe 23, an electric valve 1 24, an electric valve 2 25 and a three-way pipe 26.

[0019] The outlet of the fine grid water inlet channel 1 is connected to the inlet of the fine grid water outlet channel 4 through the fine grid connecting channel 23. There are multiple fine grid connecting channels 23 arranged side by side. The fine grid water inlet gate valve 2 and the fine grid 3 are installed on the fine grid connecting channel 23.

[0020] The fine screen outlet channel 4 is provided with two outlets, one of which is connected to the inlet of the mixing tank module, on which an electric gate valve 1 5 is installed, and the other is connected to the inlet of the grit tank inlet channel 12, on which an electric gate valve 2 10 is installed. The outlet of the mixing tank module is connected to the inlet of the grit tank inlet channel 12, and an electric gate valve 3 11 is installed on the outlet of the mixing tank module. The mixing tank module is mainly composed of mixing tank 1 6, mixing tank 2 7 and mixing tank 3 8. One of the outlets of the fine screen outlet channel 4 is connected to the inlet of mixing tank 1 6, the outlet of mixing tank 1 6 is connected to the inlet of mixing tank 2 7, the outlet of mixing tank 2 7 is connected to the inlet of mixing tank 3 8, and the outlet of mixing tank 3 8 is connected to the inlet of the grit tank inlet channel 12. Mixers are installed in mixing tank 1 6, mixing tank 2 7 and mixing tank 3 8.

[0021] The outlet of the grit chamber inlet channel 12 is connected to the inlet of the multifunctional pool 15, and an electric gate valve 13 is installed at the outlet of the grit chamber inlet channel 12; the outlet of the multifunctional pool 15 is connected to the inlet of the outlet channel 18, and an electric gate valve 17 is installed at the outlet of the multifunctional pool 15. An air lift system 14, a slag skimmer system 16, an aeration system 20 and a sludge scraper system 22 are installed in the multifunctional pool 15, and the subsequent sewage is discharged through the outlet channel 18 after being treated in the multifunctional pool 15.

[0022] The sludge storage tank 9 is arranged on one side of the mixing tank module, and a submersible sewage pump 21 is installed in the sludge storage tank 9. The first opening of the three-way pipe 26 is connected to the air lift mud discharge branch pipe 23 through the electric valve 1 24, the second opening is connected to the sand-water separation system 19 through the electric valve 25, and the second opening is connected to the air lift system 14; the sludge storage tank 9 is connected to the air lift mud discharge branch pipe 23. If the multifunctional tank 15 is used as a primary sedimentation tank, the electric valve 1 24 is opened, the electric valve 2 25 is closed, and the air lift system 14 discharges mud to the sludge storage tank 9 through the air lift mud discharge branch pipe 23. If the multifunctional tank 15 is used as an aerated sand settling tank mode, the electric valve 2 25 is opened, the electric valve 1 24 is closed, and the air lift system 14 sends sand and water to the sand-water separation system 19.

[0023] If the system inlet SS is high and contains a large amount of inorganic sand particles, the utility model operates the aeration grit chamber mode, and the factory sewage enters the fine grid 3 through the fine grid inlet channel 1. By closing the electric gate valve 1 5 and the electric gate valve 3 11, and opening the electric gate valve 2 10, the sewage is allowed to enter the multifunctional tank 15 from the grit chamber inlet channel 12 for aeration and grit settling. The air lift system 14, the skimming pipe system 16, the sand and water separation system 19 and the aeration system 20 are operated in the multifunctional tank 15. The waste is separated by the sand and water separation system 19 and then transported out.

[0024] If the system has high COD, high SS and less inorganic sand particles in the influent, the utility model operates the primary sedimentation tank mode, that is, operates the fine grid 3, closes the electric gate valve 2 10, opens the electric gate valve 3 11, and allows the sewage to enter the mixing tank 1 6, mixing tank 2 7, and mixing tank 3 8, and coagulates with the addition of PAC, PAM and other agents. After coagulation, open the electric gate valve 4 13, and the sewage enters the multifunctional tank 15 from the sand settling tank inlet channel 12, and flows out from the outlet channel 18 after primary sedimentation. The air lift system 14 and the sludge scraping system 22 are operated in the multifunctional tank 15, and the sludge in the sludge storage tank 9 is discharged through the submersible sewage pump 21.

[0025] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A sewage pretreatment system with switchable operation modes, characterized in that: It includes a fine screen water inlet channel, a fine screen water inlet gate valve, a fine screen, a fine screen water outlet channel, an electric gate valve 1, an electric gate valve 2, an electric gate valve 3, an electric gate valve 4, a mixing tank module, a sand settling tank water inlet channel, a multifunctional tank and a water outlet channel; the outlet of the fine screen water inlet channel is connected to the inlet of the fine screen water outlet channel through a fine screen connecting channel, and the fine screen water inlet gate valve and the fine screen are installed on the fine screen connecting channel; The fine screen outlet channel is provided with two outlets, one of which is connected with the inlet of the mixing tank module, on which an electric gate valve 1 is installed, and the other outlet is connected with the inlet of the grit tank inlet channel, on which an electric gate valve 2 is installed; the outlet of the mixing tank module is connected with the inlet of the grit tank inlet channel, on which an electric gate valve 3 is installed; the outlet of the grit tank inlet channel is connected with the inlet of the multi-functional tank, on which an electric gate valve 4 is installed; the outlet of the multi-functional tank is connected with the inlet of the outlet channel.

2. The sewage pretreatment system with switchable operation modes according to claim 1 is characterized in that: The fine grid communication channels are multiple and arranged side by side.

3. The sewage pretreatment system with switchable operation modes according to claim 1 is characterized in that: The mixing pool module is mainly composed of mixing pool one, mixing pool two and mixing pool three. One of the outlets of the fine screen outlet channel is connected to the inlet of mixing pool one, the outlet of mixing pool one is connected to the inlet of mixing pool two, the outlet of mixing pool two is connected to the inlet of mixing pool three, and the outlet of mixing pool three is connected to the inlet of the sand settling tank inlet channel.

4. The sewage pretreatment system with switchable operation modes according to claim 3 is characterized in that: Agitators are installed in the mixing tank one, mixing tank two and mixing tank three.

5. The sewage pretreatment system with switchable operation modes according to claim 1, characterized in that: An electric gate valve five is installed at the outlet of the multifunctional pool.

6. The sewage pretreatment system with switchable operation modes according to claim 1, characterized in that: An air stripping system is installed in the multifunctional pool.

7. The sewage pretreatment system with switchable operation modes according to claim 6, characterized in that: It also includes a sludge storage tank, a sand-water separation system, an air lift sludge discharge branch pipe, an electric valve 1, an electric valve 2 and a tee pipe; the first opening of the tee pipe is connected to the air lift sludge discharge branch pipe through an electric valve 1, the second opening is connected to the sand-water separation system through an electric valve 2, and the third opening is connected to the air lift system; the sludge storage tank is connected to the air lift sludge discharge branch pipe.

8. The sewage pretreatment system with switchable operation modes according to claim 7, characterized in that: A submersible sewage pump is installed in the sludge storage tank.

9. The sewage pretreatment system with switchable operation modes according to claim 7, characterized in that: The sludge storage tank is arranged on one side of the mixing tank module.

10. The sewage pretreatment system with switchable operation modes according to claim 1, characterized in that: The multifunctional pool is equipped with a slag skimming pipe system, an aeration system and a mud scraping system.

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