Domestic sewage treatment facility

Abstract

The utility model provides a domestic sewage treatment facility. The domestic sewage treatment facility comprises an adjusting tank, a high-water-level lifting pump, a low-water-level lifting pump, a biological reaction tank, filler, a reflux pump, a water distributor, a filter material tank and a water producing pump, a water inlet pipe is arranged on the upper portion of the adjusting tank, a water outlet pipe is arranged on the lower portion of the filter material tank, the adjusting tank, the biological reaction tank and the filter material tank are sequentially communicated through pipelines, the high-water-level lifting pump, the low-water-level lifting pump and the reflux pump are connected to the pipeline between the adjusting tank and the biological reaction tank from top to bottom, and the water producing pump is arranged on the water outlet pipe of the filter material tank. The filler and the water distributor are arranged in the biological reaction tank, the filler is arranged below the water distributor, and the high-water-level lifting pump and the low-water-level lifting pump are respectively communicated with the water distributor; wherein the high-water-level lifting pump, the low-water-level lifting pump, the reflux pump and the water producing pump are respectively in communication connection with the PLC. According to the utility model, inlet water can be recycled, so that active strains in the facility cannot die due to dryness, and the sewage treatment efficiency can be continuously kept.

Description

Technical Field

[0001] The utility model relates to the technical field of domestic sewage treatment, in particular to a domestic sewage treatment facility, which can be widely used in the treatment links of rural and urban domestic sewage. Background Art

[0002] With the vigorous construction of domestic sewage treatment projects, the coverage of sewage treatment facilities has gradually expanded, gradually achieving two-way coverage in rural and urban areas. The number of permanent residents in rural and urban areas and per capita water consumption are important indicators to be considered in measuring and designing the sewage treatment capacity of sewage treatment facilities, and the role of sewage treatment depends on the active bacteria distributed in the sewage treatment facilities.

[0003] At present, the common situation in rural and urban areas is that the population mobility is large. For example, during holidays, especially short holidays, the number of permanent residents and per capita water consumption in some areas may drop or increase sharply. Correspondingly, the amount of domestic sewage generated will fluctuate greatly. When the number of permanent residents and per capita water consumption drop sharply, the active bacteria in the sewage treatment facilities will gradually dry up and die due to insufficient water intake, resulting in a significant reduction in the sewage treatment efficiency of the sewage treatment facilities. When the number of permanent residents and per capita water consumption increase sharply, the sewage treatment will not be able to achieve the expected results continuously due to insufficient number of surviving active bacteria in the facilities.

[0004] In view of this, overcoming the defects of the prior art is an urgent problem to be solved in the field of this technology. Utility Model Content

[0005] The utility model provides a solution to the technical problem in the prior art that when the number of permanent residents and per capita water consumption in sewage treatment facilities decrease sharply, the active bacteria in the sewage treatment facilities will gradually dry up and die due to insufficient water intake, resulting in a significant reduction in the sewage treatment efficiency of the sewage treatment facilities.

[0006] In order to solve the above technical problems, the utility model provides a domestic sewage treatment facility, comprising:

[0007] Regulating tank 1, high water level lifting pump 2, low water level lifting pump 3, biological reaction tank 4, filler 5, reflux pump 6, water distributor 7, filter material tank 10 and water production pump 11;

[0008] An inlet pipe is provided at the upper part of the regulating tank 1, and an outlet pipe is provided at the lower part of the filter material tank 10. The regulating tank 1, the biological reaction tank 4 and the filter material tank 10 are connected in sequence through pipelines. The high water level lifting pump 2, the low water level lifting pump 3 and the reflux pump 6 are connected to the pipeline between the regulating tank 1 and the biological reaction tank 4 from high to low. The water production pump 11 is arranged on the outlet pipe of the filter material tank 10. The filler 5 and the water distributor 7 are arranged inside the biological reaction tank 4. The filler 5 is arranged below the water distributor 7. The high water level lifting pump 2 and the low water level lifting pump 3 are respectively connected to the water distributor 7;

[0009] Among them, the high water level lifting pump 2, the low water level lifting pump 3, the reflux pump 6 and the water production pump 11 are respectively connected to the PLC controller for communication.

[0010] Preferably, the fillers 5 are arranged in multiple layers at intervals.

[0011] Preferably, the water distributor 7 is arranged in a linear array.

[0012] Preferably, it further comprises a blower 8 and an aerator 9 , wherein the blower 8 is arranged outside the biological reaction tank 4 and is connected with the aerator 9 through a pipeline, and the aerator 9 is arranged inside the biological reaction tank 4 and below the filler 5 .

[0013] Preferably, the aerators 9 are arranged in a linear array.

[0014] Preferably, the filler 5 includes denitrifying phosphorus-accumulating bacteria.

[0015] In view of the deficiencies in the prior art, the beneficial effects that can be achieved by the utility model are as follows:

[0016] The utility model provides a domestic sewage treatment facility. By means of a low water level lifting pump and a reflux pump, incoming water can be recycled. Even if the incoming water volume decreases sharply, it can ensure that the active bacteria in the facility will not die due to drying up, so that the sewage treatment efficiency of the water treatment facility can be continuously maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the embodiments of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the connection status of a domestic sewage treatment facility provided in this embodiment.

[0019] In the accompanying drawings, the same reference numerals are used to denote the same components or structures, wherein:

[0020] 1- regulating tank; 2- high water level lifting pump; 3- low water level lifting pump; 4- biological reaction tank; 5- filler; 6- reflux pump; 7- water distributor; 8- blower; 9- aerator; 10- filter tank; 11- water production pump. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0023] In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] In order to solve the technical problem that when the number of permanent residents and per capita water consumption in the sewage treatment facilities in the prior art decreases sharply, the active bacteria in the sewage treatment facilities will gradually dry up and die due to insufficient water intake, resulting in a significant reduction in the sewage treatment efficiency of the sewage treatment facilities, this embodiment provides a domestic sewage treatment facility, such as Figure 1 As shown, it includes: a regulating tank 1, a high water level lifting pump 2, a low water level lifting pump 3, a biological reaction tank 4, a filler 5, a reflux pump 6, a water distributor 7, a filter material tank 10 and a water production pump 11; an inlet pipe is provided at the upper part of the regulating tank 1, and an outlet pipe is provided at the lower part of the filter material tank 10. The regulating tank 1, the biological reaction tank 4 and the filter material tank 10 are connected in sequence through pipelines, and the high water level lifting pump 2, the low water level lifting pump 3 and the reflux pump 6 are connected to the pipeline between the regulating tank 1 and the biological reaction tank 4 from high to low. The water production pump 11 is arranged on the outlet pipe of the filter material tank 10, the filler 5 and the water distributor 7 are arranged inside the biological reaction tank 4, the filler 5 is arranged below the water distributor 7, and the high water level lifting pump 2 and the low water level lifting pump 3 are respectively connected to the water distributor 7; wherein, the high water level lifting pump 2, the low water level lifting pump 3, the reflux pump 6 and the water production pump 11 are respectively connected to the PLC controller for communication.

[0025] In this embodiment, under the control of the PLC controller, the start and stop conditions of the high water level lift pump 2, the low water level lift pump 3, the return pump 6 and the water production pump 11 can be switched according to the water intake. By setting the low water level lift pump 3 and the return pump 6, the incoming water can be recycled. Even if the water intake drops sharply, it can ensure that the active bacteria in the facility will not die due to drying up, so that the sewage treatment efficiency can be continuously maintained.

[0026] During actual application, in order to increase the bacterial attachment rate and improve the impact resistance of the sewage treatment system, and at the same time, to facilitate the replacement of the filler 5, the filler 5 is arranged in a multi-level interval, that is, a certain space is reserved between the fillers 5, which can increase the contact area between the filler 5 and the air, create a good air circulation environment, improve the oxygen supply environment in the biological reaction tank 4, and reduce the adverse effects of the siltation of the filler 5 on the entire sewage treatment system; further, the water distributor 7 is arranged in a linear array, and the domestic sewage can be evenly and comprehensively sprayed onto the filler 5 in the biological reaction tank 4 through the water distributor 7 arranged in the linear array, which is beneficial to the growth and reproduction of the bacteria in the filler 5, and can further ensure the sewage treatment efficiency of the sewage treatment facility.

[0027] In order to enhance the vitality of the bacterial species in the filler 5, a domestic sewage treatment facility provided in this embodiment also includes a blower 8 and an aerator 9. The blower 8 is arranged outside the biological reaction tank 4 and is connected to the aerator 9 through a pipeline. The aerator 9 is arranged inside the biological reaction tank 4 and is located below the filler 5. Through the combined application of the blower 8 and the aerator 9, oxygen can be transported to the water in the biological reaction tank 4. After the bacterial species in the filler 5 encounter oxygen, their vitality is enhanced, and the sewage treatment efficiency is further guaranteed. Similarly, the aerator 9 is also arranged in a linear array, so as to enhance the contact area between the air (oxygen) and the filler 5.

[0028] In some application scenarios, according to the different water qualities of domestic sewage, in order to expand the application scenarios of sewage treatment facilities, it is necessary to remove the COD and BOD that may exist in domestic sewage. 5 , ammonia nitrogen and total phosphorus, preferably, the filler 5 includes denitrifying polyphosphate bacteria.

[0029] This embodiment provides a domestic sewage treatment facility, the implementation process of which is as follows:

[0030] like Figure 1 As shown, domestic sewage enters from the water inlet pipe at the top of the regulating tank 1:

[0031] When the water inflow reaches a certain amount (for example, the water inflow reaches 30% of the maximum design capacity of the regulating tank 1), the high water level lifting pump 2 and the water production pump 11 are started, and at the same time, the low water level lifting pump 3 and the return pump 6 are stopped, and the domestic sewage passes through the high water level lifting pump 2 and the water distributor 7 and is sprayed onto the filler 5 in the biological reaction tank 4. The domestic sewage enters the filter material pool 10 after being purified by the bacteria in the filler 5, and then is transported to the next link by the water production pump 11, that is, the sewage treatment function is started when the water inflow is large; when the water inflow is less than a certain amount (for example, the water inflow is less than 30% of the maximum design capacity of the regulating tank 1), the high water level lifting pump 2 and the water production pump 11 are stopped, and at the same time, the low water level lifting pump 3 and the return pump 6 are started, and the domestic sewage passes through the low water level lifting pump 3 and the water distributor 7 and is sprayed onto the filler 5 in the biological reaction tank 4. The domestic sewage enters the regulating tank 1 through the return pump 6 after being purified by the bacteria in the filler 5, that is, the bacterial cultivation function is started when the water inflow is small. This cycle continues.

[0032] Among them, the start and stop states of the high water level lifting pump 2, the low water level lifting pump 3, the reflux pump 6 and the water production pump 11 can be automatically controlled by PLC; in the above process, the blower 8 and the aerator 9 can supply oxygen to the water in the biological reaction tank 4 as needed, thereby enhancing the activity of the bacteria in the filler 5.

[0033] Through the above process, it can be known that the domestic sewage treatment facility provided by this embodiment can, even if the water volume of domestic sewage entering the sewage treatment facility is sharply reduced, the active bacteria in the facility will not gradually dry up and die due to insufficient water volume, and the survival rate of the bacteria can be effectively guaranteed, thereby enabling the sewage treatment efficiency of the sewage treatment facility to be continuously maintained, thereby achieving a maintenance-free technical effect.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A domestic sewage treatment facility, characterized in that: include: A regulating tank (1), a high water level lifting pump (2), a low water level lifting pump (3), a biological reaction tank (4), a filler (5), a reflux pump (6), a water distributor (7), a filter material tank (10) and a water production pump (11); A water inlet pipe is provided at the top of the regulating tank (1), and a water outlet pipe is provided at the bottom of the filter material tank (10). The regulating tank (1), the biological reaction tank (4) and the filter material tank (10) are connected in sequence through pipelines. A high water level lifting pump (2), a low water level lifting pump (3) and a reflux pump (6) are connected to the pipeline between the regulating tank (1) and the biological reaction tank (4) from high to low. A water production pump (11) is provided on the water outlet pipe of the filter material tank (10). A filler (5) and a water distributor (7) are provided inside the biological reaction tank (4). The filler (5) is provided below the water distributor (7). The high water level lifting pump (2) and the low water level lifting pump (3) are respectively connected to the water distributor (7). The high water level lifting pump (2), the low water level lifting pump (3), the reflux pump (6) and the water production pump (11) are respectively connected to the PLC controller for communication.

2. The domestic sewage treatment facility according to claim 1, characterized in that: The fillers (5) are arranged in multiple layers at intervals.

3. The domestic sewage treatment facility according to claim 2, characterized in that: The water distributor (7) is arranged in a linear array.

4. The domestic sewage treatment facility according to claim 1, characterized in that: It also includes a blower (8) and an aerator (9), wherein the blower (8) is arranged outside the biological reaction tank (4) and is connected to the aerator (9) through a pipeline, and the aerator (9) is arranged inside the biological reaction tank (4) and below the filler (5).

5. The domestic sewage treatment facility according to claim 4, characterized in that: The aerators (9) are arranged in a linear array.

6. The domestic sewage treatment facility according to claim 1, characterized in that: The filler (5) includes denitrifying phosphorus-accumulating bacteria.

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