A household-type intelligent rural domestic sewage resource utilization pretreatment facility

Abstract

The invention discloses a household-type intelligent rural domestic sewage resource utilization pretreatment facility, comprising a reaction device body, an inlet water conductivity meter, an aeration system, and an intelligent control module. The reaction device body comprises a regulating tank, a main reaction tank, and a disinfection sedimentation tank separated by a partition. The regulating tank and the disinfection sedimentation tank are respectively provided with an inlet pipe and an outlet pipe. The electrode end of the inlet water conductivity meter is arranged in the regulating tank, and the other end is connected to the intelligent control module. The aeration system is arranged in the main reaction tank and connected to the intelligent control module. The intelligent control module controls the operation of the aeration system by receiving the conductivity signal of the inlet water conductivity meter and the user's selection of the outlet water quality, so as to realize the intelligent aeration treatment of the sewage and realize the multi-state outlet water, that is, the outlet water in the irrigation season can meet different irrigation standards, and the outlet water in the non-irrigation season can meet the water pollutant emission standards of rural domestic sewage facilities.

Description

Technical Field

[0001] The present invention relates to the technical field of domestic sewage treatment, and in particular to a household-type intelligent rural domestic sewage resource utilization pretreatment facility. Background Art

[0002] Rural domestic sewage treatment is a heavy task and requires huge funds. In traditional rural domestic sewage treatment, the measures usually selected are to miniaturize urban sewage treatment plants, and the equipment used is complex and costly. This also increases the difficulty of rural domestic sewage operation and maintenance.

[0003] Rural areas have many farmlands, vegetable gardens and other resource utilization conditions, but most rural domestic sewage treatment processes do not take this favorable condition into account. However, irrigation of farmlands and vegetables is often seasonal, and in non-irrigation seasons, it is necessary to discharge the wastewater after it meets the standards.

[0004] The water quality of rural domestic sewage is fluctuating, and its water outlet requirements are also different. If the air pump is always in an aeration state, it will cause a waste of resources.

[0005] The main water quality indicator for domestic sewage irrigation is COD, which is detected by potassium dichromate titration. It is difficult to detect COD values ​​in real time in rural areas. Summary of the invention

[0006] The purpose of the present invention is to address the defects of the prior art and provide an intelligent rural domestic sewage resource utilization pretreatment facility, which can achieve polymorphic effluent through intelligent regulation, that is, the effluent in the irrigation season can meet different irrigation standards, and the effluent in the non-irrigation season can meet the water pollutant emission standards of rural domestic sewage facilities.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A household-type intelligent rural domestic sewage resource utilization pretreatment facility is characterized by comprising a reaction device body, an inlet water conductivity meter, an aeration system, and an intelligent control module. The reaction device body comprises a regulating tank, a main reaction tank, and a disinfection sedimentation tank separated by a partition. The regulating tank, the main reaction tank, and the disinfection sedimentation tank are sequentially connected through pipelines. The regulating tank and the disinfection sedimentation tank are respectively provided with an inlet pipe and an outlet pipe. The electrode end of the inlet water conductivity meter is arranged in the regulating tank, and the other end is connected to the intelligent control module. The aeration system is arranged in the main reaction tank and connected to the intelligent control module. The intelligent control module controls the operation of the aeration system by receiving the conductivity signal of the inlet water conductivity meter and the user's selection of the outlet water quality, thereby realizing intelligent aeration treatment of sewage.

[0009] Furthermore, the effective volume of the reaction device body is 0.5~1m 3 The volume ratio of the equalization tank, main reaction tank and disinfection sedimentation tank is 2:3:1.

[0010] Furthermore, a biological filler is arranged in the main reaction tank, and the biological filler can be a polyethylene MBBR filler or a polyurethane sponge block filler, and its filling rate is 30% to 50%.

[0011] Furthermore, the aeration system includes an aeration pipe and an air pump. The aeration pipe is arranged at the bottom of the main reaction tank and is connected to the air pump via a PVC air guide pipe. The intelligent control module is connected to and controls the air pump.

[0012] Furthermore, the aeration pipe adopts an EPDM aeration pipe with a pipe diameter of 67 mm and a pipe length of 200 mm to 300 mm.

[0013] Furthermore, the power of the air pump is 30W.

[0014] Furthermore, a small bin is provided in the disinfection sedimentation tank for storing a slow-release fungicide.

[0015] Furthermore, the intelligent regulation module adopts a PLC control system, which includes four effluent water quality options, namely paddy field irrigation, dry land irrigation, vegetable field irrigation, and standard discharge. These four effluent water quality options correspond to four operating modes. The PLC control system calculates and controls the start and stop time of the aeration system according to the effluent water quality options and the conductivity of the inlet water, thereby realizing intelligent aeration of sewage.

[0016] Furthermore, the paddy field irrigation water quality, dry land irrigation water quality and vegetable field irrigation water quality requirements corresponding to the paddy field irrigation, dry land irrigation and vegetable field irrigation options are taken from the national "Agricultural Irrigation Water Quality Standard (GB 5084-2021)", and the water quality requirements for standard emissions are taken from the Jiangsu Provincial Local Standard "Rural Domestic Sewage Treatment Facility Water Pollutant Emission Standard (DB32_3462-2020)".

[0017] Compared with the prior art, the beneficial effects of the present invention are: it is suitable for domestic sewage treatment of a single household or less than 5 households in rural areas, and the effluent can be utilized as resources on site, saving the cost of laying collection pipes; the average household cost of the "relatively centralized treatment" or "decentralized treatment" mode is currently 25,000 to 30,000 yuan, while the cost of rural domestic sewage resource utilization pretreatment facilities based on this technology is only 6,000 to 7,000 yuan; it can provide nitrogen and phosphorus resources for resource irrigation, saving waste required by farmers; simply treating rural sewage and using it for irrigation can save water resources, which is of great significance to areas with scarce water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention;

[0019] Figure 2 A top view of the structure of an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the main structure of a reaction device according to an embodiment of the present invention;

[0021] Among them: 1-reaction device body, 2-inlet conductivity meter, 3-aeration system, 4-biological filler, 5-small warehouse, 6-PLC control system, 101-regulating tank, 102-main reaction tank, 103-disinfection sedimentation tank, 104-pipeline, 105-partition, 106-inlet pipe, 107-outlet pipe, 201-electrode end, 301-EPDM aeration pipe, 302-air pump, 303-PVC air guide pipe. DETAILED DESCRIPTION

[0022] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0023] Figure 1-3 The invention shows a specific embodiment of a household-type intelligent rural domestic sewage resource utilization pretreatment facility, comprising a reaction device body 1, an inlet water conductivity meter 2, an aeration system 3, and an intelligent control module. The intelligent control module adopts a PLC control system 6. The reaction device body 1 comprises a regulating tank 101, a main reaction tank 102, and a disinfection sedimentation tank 103 separated by a partition 105. The regulating tank 101, the main reaction tank 102, and the disinfection sedimentation tank 103 are sequentially connected through a pipeline 104. The regulating tank 101 and the disinfection sedimentation tank 103 are respectively provided with an inlet pipe 106 and an outlet pipe 107. The electrode end 201 of the inlet water conductivity meter 2 is arranged in the regulating tank 101, and the other end is connected to the PLC control system 6. The aeration system 3 is arranged in the main reaction tank 102 and connected to the PLC control system 6. The PLC control system 6 controls the operation of the aeration system 3 by receiving the conductivity signal of the inlet water conductivity meter 2 and the user's selection of the outlet water quality, thereby realizing intelligent aeration treatment of sewage.

[0024] Preferably, the effective volume of the reaction device body 1 is 0.5~1m 3 , and the volume ratio of the regulating tank 101, the main reaction tank 102, and the disinfection sedimentation tank 103 is 2:3:1. The main reaction tank 102 is provided with a biological filler 4, and the biological filler 4 can be polyethylene MBBR filler or polyurethane sponge block filler, and its filling rate is 30% to 50%.

[0025] The aeration system 3 includes an EPDM aeration pipe 301 and an air pump 302. The EPDM aeration pipe 301 is arranged at the bottom of the main reaction tank 102 and connected to the air pump 302 through a PVC air guide pipe 303. The PLC control system 6 is connected to and controls the air pump 302. The diameter of the EPDM aeration pipe 301 is 67 mm and the length is 200 mm to 300 mm. The power of the air pump 302 is 30 W.

[0026] A small bin 5 for slow-release bactericide chlorine tablets is provided in the disinfection sedimentation tank 103, and chlorine tablets can be added regularly.

[0027] The PLC control system 6 has a feedforward signal, which comes from the electrode 201 of the inlet water conductivity meter 2 set in the regulating tank 101, and the feedback signal is given to the air pump 302. The inlet water conductivity meter 2 can obtain the conductivity data of the inlet water in real time and transmit it to the PLC control system 6 through an electrical signal; the PLC control system 6 has a display screen, and the display screen has four options of "paddy field irrigation", "dry land irrigation", "vegetable field irrigation" and "standard discharge", which represent four effluent water qualities respectively, used for different irrigation standards and environmental protection emission standards, and users can manually select on the display screen according to their needs; these four effluent water options correspond to four operating modes, and the PLC control system 6 calculates and controls the start and stop time of the air pump 302 according to the effluent water quality options of the farmers and the conductivity of the inlet water quality, so as to realize the intelligent aeration of sewage.

[0028] The air pump 302 is turned off or on according to the signal described in the table below based on the conductivity signal and user input.

[0029] Table 1: PLC control logic table

[0030]

[0031] The user selects the "paddy field irrigation" option on the display screen of the PLC control system 6. At this time, the real-time conductivity data collected by the inlet water conductivity meter 2 is 1084μs / cm. According to the control command in the PLC control table, the air pump 302 executes the "air pump is turned on for 1 hour and off for 3 hours" command. At this time, the outlet water is monitored and it is found that the outlet COD concentration is 99 mg / L, which can meet the water quality requirements for paddy field crop irrigation in the "Agricultural Irrigation Water Quality Standard" (GB 5084-2021).

[0032] The user selects the "dry land irrigation" option on the display screen of the PLC control system 6. At this time, the real-time conductivity data collected by the inlet water conductivity meter 2 is 1249μs / cm. According to the control command in the PLC control table, the air pump 302 executes the "air pump is turned on for 1 hour and off for 3 hours" command. At this time, the outlet water is monitored and it is found that the outlet COD concentration is 132 mg / L, which can meet the water quality requirements for dryland crop irrigation in the "Agricultural Irrigation Water Quality Standard" (GB 5084-2021).

[0033] The user selects the "vegetable irrigation" option on the display screen of the PLC control system 6. At this time, the real-time conductivity data collected by the inlet water conductivity meter 2 is 1054μs / cm. According to the control command in the PLC control table, the air pump 302 executes the command of "the air pump is turned on for 160 minutes and off for 80 minutes". At this time, the outlet water is monitored and it is found that the outlet COD concentration is 35 mg / L, which can meet the water quality requirements for vegetable crop irrigation in the "Agricultural Irrigation Water Quality Standard" (GB 5084-2021).

[0034] The user selects the "Meet Emission Standards (Level 2)" option on the display screen of the PLC control system 6. At this time, the real-time conductivity data collected by the inlet water conductivity meter 2 is 890μs / cm. According to the control command in the PLC control table, the air pump 302 executes the command of "the air pump is on for 80 minutes and off for 160 minutes". At this time, the effluent is monitored and it is found that the effluent COD concentration is 30 mg / L and the effluent ammonia nitrogen concentration is 6.6 mg / L, which can meet the secondary standard in the "Water Pollutant Discharge Standard for Rural Domestic Wastewater Treatment Facilities" (DB32_3462-2020).

[0035] The above specific implementation methods are only for illustrating the technical concept and structural features of the present invention, and the purpose is to enable relevant persons familiar with this technology to implement it. However, the above content does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A household-type intelligent rural domestic sewage resource utilization pretreatment facility, characterized by: The invention comprises a reaction device body (1), an inlet water conductivity meter (2), an aeration system (3), and an intelligent control module. The reaction device body (1) is composed of a regulating tank (101), a main reaction tank (102), and a disinfection sedimentation tank (103) separated by a partition (105). The regulating tank (101), the main reaction tank (102), and the disinfection sedimentation tank (103) are sequentially connected through a pipeline (104). The regulating tank (101) and the disinfection sedimentation tank (103) are respectively provided with an inlet pipe (106) and an outlet pipe (107). The electrode end (201) of the conductivity meter (2) is arranged in the regulating tank (101), and the other end is connected to the intelligent control module. The aeration system (3) is arranged in the main reaction tank (102) and is connected to the intelligent control module. The intelligent control module controls the operation of the aeration system (3) by receiving the conductivity signal of the inlet water conductivity meter (2) and the user's selection of the outlet water quality, thereby realizing intelligent aeration treatment of sewage. The main reaction tank (102) is provided with a biological filler (4), and the biological filler (4) is a polyethylene MBBR filler or a polyurethane filler. The ester sponge block filler has a filling rate of 30% to 50%; the aeration system (3) comprises an aeration pipe and an air pump (302); the aeration pipe is arranged at the bottom of the main reaction tank (102) and is connected to the air pump (302) via a PVC air guide pipe (303); the intelligent control module is connected to and controls the air pump (302); the aeration pipe adopts an EPDM aeration pipe (301) with a diameter of 67 mm and a length of 200 mm to 300 mm; the intelligent control module adopts a PLC control system (6); the PLC control system (6) has The display screen has four options, namely "paddy field irrigation", "dry land irrigation", "vegetable field irrigation" and "standard discharge", which respectively represent four effluent water qualities. The four effluent water quality options correspond to four operation modes. The PLC control system (6) calculates and controls the start and stop time of the aeration system according to the effluent water quality options and the conductivity of the inlet water, so as to realize intelligent aeration of sewage. The paddy field irrigation water quality, dry land irrigation water quality and vegetable field irrigation water quality requirements corresponding to the paddy field irrigation, dry land irrigation and vegetable field irrigation options are all taken from the national standard "Agricultural Irrigation Water Quality Standard (GB 5084-2021)", and the standard discharge water quality requirements are taken from the Jiangsu Provincial Local Standard "Rural Domestic Wastewater Treatment Facility Water Pollutant Discharge Standard (DB32 / 3462-2020)". The disinfection sedimentation tank (103) is provided with a small warehouse (5) for placing a slow-release fungicide.

2. According to claim 1, a household-type intelligent rural domestic sewage resource utilization pretreatment facility is characterized by: The effective volume of the reaction device body (1) is 0.5~1m 3 , and the volume ratio of the regulating tank (101), the main reaction tank (102), and the disinfection sedimentation tank (103) is 2:3:

1.

3. According to claim 1, a household-type intelligent rural domestic sewage resource utilization pretreatment facility is characterized by: The power of the air pump (302) is 30W.

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