Domestic sewage purification and recycling system and method

Abstract

The invention discloses a household sewage purification and recycling system and method.The household sewage purification and recycling system comprises an intelligent control module, a sewage purification module and a household intelligent management module, the sewage purification module comprises a sewage filtering unit, and the sewage filtering unit is connected with a first branch pipe through a water pump; the upper water outlet end of the first branch pipe is connected with a first energy recovery module, the first energy recovery module is connected with a heat exchanger through a water pump, the top of the biological purification module is connected with a sucking pump, and the air outlet end of the sucking pump is connected with a second energy recovery module. Household sewage is purified by arranging the sewage purification module, heat transfer between the sewage and household floor heating is achieved through the heat exchanger, the second energy recovery module generates and stores electric energy in the sewage purification process, and the electric energy is used in the sewage purification module and the smart home; the energy in the sewage is recycled while the household sewage is purified, and the environment friendliness of the household sewage purifying and recycling system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household sewage purification, and in particular to a household sewage purification and recycling system and method. Background Art

[0002] With the aggravation of environmental pollution problems, the demand for domestic sewage treatment is increasing. At present, the purification method for domestic sewage is generally to transport domestic sewage through municipal pipelines to a designated location and then conduct centralized aeration treatment. However, this sewage purification method is difficult to recycle the energy in domestic sewage, and gases such as carbon dioxide generated during the sewage treatment process are likely to have adverse effects on the environment. It is also difficult to carry out targeted treatment and effective recycling of domestic sewage according to the water needs of different households.

[0003] Therefore, a household sewage purification and recycling system and method are needed to solve the above problems and effectively purify and recycle household sewage.

[0004] The defects of existing household sewage purification systems are:

[0005] 1. The patent document JP2015127039A mainly considers how to achieve a compact structure of the sewage treatment system, but does not consider how to recycle the energy generated during the sewage purification process and reduce the adverse impact on the environment during the sewage purification process;

[0006] 2. The patent document JP2011011175A mainly considers the problem of treating domestic sewage by reusing chemical reagents and biological treatment methods, but does not consider how to improve the utilization rate of energy collected during sewage purification and reduce the cost of sewage purification;

[0007] 3. Patent document CN110550845B mainly considers how to simplify the purification system structure and reduce the purification cost, but does not consider how to fully utilize domestic sewage and efficiently utilize energy;

[0008] 4. Patent document CN110550843B mainly considers how to prevent domestic sewage from generating odor during the purification process, but does not consider how to grade the sewage and distribute it according to household needs. Summary of the invention

[0009] The object of the present invention is to provide a household sewage purification and recycling system and method to solve the problems raised in the above background technology.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a household sewage purification and recycling system, comprising an intelligent control module, a sewage purification module and a home intelligent management module, the intelligent control module is used to control the sewage purification process of the sewage purification module, the home intelligent management module is used to obtain household data and manage the smart home, and the intelligent control module is electrically connected to the home intelligent management module;

[0011] The sewage purification module includes a sewage filtering unit, the sewage filtering unit is connected to a first branch pipe through a water pump, a first temperature sensor is arranged inside the first branch pipe, an upper water outlet end of the first branch pipe is connected to a first energy recovery module, a right water outlet end of the first branch pipe is connected to a biological purification module, the first energy recovery module is connected to a heat exchanger through a water pump, a sewage outlet is arranged at the bottom of the heat exchanger, a second branch pipe is connected to the bottom end of the sewage outlet, a left water outlet end of the second branch pipe is connected to the outer wall of the first branch pipe, a lower water outlet end of the second branch pipe is connected to the biological purification module, and a home floor heating input pipe and a home floor heating output pipe are connected to the top of the heat exchanger;

[0012] The top of the biological purification module is connected to an air pump, the air outlet of the air pump is connected to a second energy recovery module, the second energy recovery module includes a gas compression unit, the left side of the gas compression unit is connected to a compressed gas storage unit, the top of the compressed gas storage unit is connected to an energy conversion unit, the right side of the energy conversion unit is connected to an electric energy storage unit, and the electric energy storage unit is electrically connected to the home intelligent management module.

[0013] Preferably, the first branch pipe is divided into an upper water outlet pipe and a right water outlet pipe, and the upper water outlet end is located at the end of the upper water outlet pipe away from the sewage filtering unit, and the right water outlet end is located at the end of the lower water outlet pipe away from the sewage filtering unit, and the outer walls of the upper water outlet pipe and the right water outlet pipe are respectively provided with a first solenoid valve, the first temperature sensor is located on the left side of the first solenoid valve, and the first temperature sensor is electrically connected to the first solenoid valve.

[0014] Preferably, the second branch pipe is used to discharge the sewage entering the heat exchanger, and the second branch pipe is divided into a left water outlet pipe and a lower water outlet pipe, and the left water outlet end is located at an end of the left water outlet pipe close to the sewage filtration unit, and the lower water outlet end is located at an end of the lower water outlet pipe close to the biological purification module, and second solenoid valves are respectively provided on the outer walls of the left water outlet pipe and the lower water outlet pipe, and a second temperature sensor is provided in the second branch pipe, the second temperature sensor is located above the second solenoid valve, and the second temperature sensor is electrically connected to the second solenoid valve.

[0015] Preferably, the vacuum pump is used to collect gas generated during the sewage purification process in the biological purification module and transmit the gas to the second energy recovery module. The gas compression unit includes a gas compressor, which is used to compress the collected gas. The compressed gas storage unit is used to store the compressed gas. The energy conversion unit is used to output the compressed gas and convert the kinetic energy of the compressed gas into electrical energy. The electrical energy storage unit is used to store the converted electrical energy and supply the electrical energy to the sewage purification module.

[0016] Preferably, the first energy recovery module includes a hot water storage tank, a heat storage box is arranged outside the hot water storage tank, an insulation layer is installed on the inner wall of the heat storage box, an electric heating plate is arranged inside the heat storage box, and the electric heating plate is located outside the hot water storage tank, and the electric heating plate is electrically connected to the second energy recovery module.

[0017] Preferably, the biological purification module includes a biological aeration box, an aeration pipe is arranged inside the biological aeration box, aeration holes are opened on the outer wall of the aeration pipe, and the aeration holes on the aeration pipe located in the same horizontal plane are controlled by a group of third solenoid valves, and a liquid level sensor is arranged inside the biological aeration box, and the liquid level sensor is electrically connected to the third solenoid valve.

[0018] Preferably, the right side of the biological purification module is connected to a pump body 1, the right end of the pump body 1 is connected to a water pipe 1, the right end of the water pipe is connected to a secondary sedimentation module, the secondary sedimentation module is used to precipitate and filter the sewage that has undergone biological purification, the right side of the secondary sedimentation module is connected to a pump body 2, the right end of the pump body 2 is connected to a circulating water pipe 1, the circulating water pipe 1 is used to output the sewage used by the secondary sedimentation module, the top of the secondary sedimentation module is connected to a pump body 3, the top of the pump body 3 is connected to a water pipe 3, the output end of the water pipe 3 is connected to a sewage disinfection module, the sewage disinfection module is used to use an ultraviolet lamp to disinfect the sewage that has passed through the secondary sedimentation module, the right side of the sewage disinfection module is connected to a pump body 4, the right end of the pump body 4 is connected to a circulating water pipe 2, and the circulating water pipe 2 is used to output the sewage in the sewage disinfection module.

[0019] Preferably, the household data includes water consumption for laundry, bathing and toilet flushing, and the home intelligent management module is electrically connected to pump body two, pump body three and pump body four.

[0020] A method for purifying and recycling domestic sewage, the method for purifying and recycling domestic sewage is as follows:

[0021] S1. Bathing sewage and kitchen sewage generated in household life enter the sewage filtration module through the pipeline. The sewage filtration module filters the household sewage and removes impurities in the sewage;

[0022] S2. The sewage passing through the sewage filter unit enters the first branch pipe through a water pump. When the first temperature sensor detects that the sewage temperature reaches the set energy recovery temperature, the sewage enters the first energy recovery module and the heat exchanger to utilize the heat energy in the domestic sewage.

[0023] S3, the domestic sewage passing through the first energy recovery module and the heat exchanger enters the biological purification module through the second branch pipe, and the domestic sewage is purified again by microbial decomposition, and the gas generated in the biological purification module is obtained by the vacuum pump and transmitted to the second energy recovery module;

[0024] S4, the second energy recovery module converts the gas kinetic energy into electrical energy, stores it in the electrical energy storage unit and distributes it to the sewage purification module;

[0025] S5. The sewage passing through the biological purification module enters the secondary sedimentation tank, where flocculants are added to precipitate and filter the domestic sewage. The filtered sewage then enters the sewage disinfection module for disinfection, and the disinfected sewage is discharged from the sewage purification module.

[0026] Preferably, in S2, the following steps are also included:

[0027] S21, the heat exchanger is connected to the household floor heating, and the household floor heating is electrically connected to the home intelligent management module;

[0028] In S4, the following steps are also included:

[0029] S41, the home intelligent management module distributes the electric energy in the electric energy storage unit;

[0030] In S5, the following steps are also included:

[0031] S51. According to the household data obtained by the furniture intelligent management module, the pump body 3 is controlled to transport the sewage in the secondary sedimentation module to the sewage disinfection module.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention purifies domestic sewage by setting a sewage purification module, realizes heat transfer between sewage and domestic floor heating through a heat exchanger, and further realizes the purpose of recycling heat energy in domestic sewage. The second energy recovery module generates and stores electric energy during the sewage purification process, and uses the electric energy in the sewage purification module and the smart home, thereby reducing the use cost and family living cost of the domestic sewage purification and recycling system. The first energy recovery module and the second energy recovery module purify the domestic sewage while recycling the energy in the sewage, and reduce the emission of carbon dioxide gas generated during the sewage purification process, thereby improving the environmental friendliness of the domestic sewage purification and recycling system.

[0034] 2. The present invention heats the sewage in the hot water storage tank by arranging a battery energy storage unit electrically connected to the first energy recovery module, so that when the sewage is used for heat exchange for household floor heating, the temperature of the household space can reach the required temperature, which is beneficial to reducing the use cost of the household sewage purification and recycling system and the household living cost.

[0035] 3. The present invention stores, manages and distributes the electric energy generated during the household sewage purification and recycling process by setting a battery energy storage unit and an energy storage management unit, so as to ensure that the household sewage purification and recycling system maintains normal operation under emergencies such as less sewage to be treated and power outages, thereby improving the autonomous operation capability of the sewage purification and recycling system. The excess electric energy in the electric energy storage unit is distributed through the home intelligent management module to supply the operation of household appliances such as household lighting, thereby achieving full utilization of household sewage and efficient utilization of electric energy.

[0036] 4. The present invention realizes multi-stage treatment of domestic sewage by setting a secondary sedimentation module and a sewage disinfection module. By electrically connecting the pump body 3 with the home intelligent management module, the sewage purification treatment volume at different levels can be controlled in combination with the household water demand, which is beneficial to improving the energy saving of the household sewage recycling system, increasing the mutual adaptability of the system and the household water demand, so that the sewage purification and recycling system can be adaptively adjusted according to different households, which is more in line with the household water use habits. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 This is a schematic structural diagram of a first energy recovery module of the present invention;

[0039] Figure 3 It is a schematic diagram of the structure of the heat storage box of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of the biological purification module of the present invention;

[0041] Figure 5 is a schematic structural diagram of a second energy recovery module of the present invention;

[0042] Figure 6 It is a schematic diagram of the structure of the secondary precipitation module of the present invention.

[0043] In the figure: 1. intelligent control module; 2. sewage purification module; 3. home intelligent management module; 4. sewage filtration unit; 5. first branch pipe; 6. first energy recovery module; 7. biological purification module; 8. second energy recovery module; 9. secondary sedimentation module; 10. sewage disinfection module; 11. first temperature sensor; 12. hot water storage tank; 13. heat storage tank; 14. insulation layer; 15. electric heating plate; 16. heat exchanger; 17. second branch pipe; 18. second temperature sensor; 19. biological aeration tank; 20. aeration pipe; 21. liquid level sensor; 22. vacuum pump; 23. gas compression unit; 24. compressed gas storage unit; 25. energy conversion unit; 26. electric energy storage unit; 27. pump body one; 28. pump body two; 29. ​​pump body three; 30. pump body four. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] See also Figure 1 , Figure 2 , Figure 3 and Figure 5, an embodiment provided by the present invention: a household sewage purification and recycling system, comprising an intelligent control module 1, a sewage purification module 2 and a home intelligent management module 3, wherein the intelligent control module 1 is used to control the sewage purification process of the sewage purification module 2, the home intelligent management module 3 is used to obtain household data and manage the smart home, the intelligent control module 1 is electrically connected to the home intelligent management module 3, the smart home includes household appliances such as household floor heating, household lighting and household water heaters, and the household data includes floor heating temperature;

[0048] The sewage purification module 2 includes a sewage filtering unit 4, a filter screen or a grille is arranged in the sewage filtering unit 4, and the sewage filtering unit is used for primary filtering of domestic sewage. The sewage filtering unit 4 is connected to a first branch pipe 5 through a water pump, and a first temperature sensor 11 is arranged inside the first branch pipe 5. The upper water outlet end of the first branch pipe 5 is connected to a first energy recovery module 6, and the right water outlet end of the first branch pipe 5 is connected to a biological purification module 7. The first energy recovery module 6 is connected to a heat exchanger 16 through a water pump, and a sewage outlet is arranged at the bottom of the heat exchanger 16. The bottom end of the sewage outlet is connected to a second branch pipe 17, and the left water outlet end of the second branch pipe 17 is connected to The outer wall of the first branch pipe 5, the lower water outlet end of the second branch pipe 17 is connected to the biological purification module 7, the top of the heat exchanger 16 is connected to the home floor heating input pipe and the home floor heating output pipe, the top of the biological purification module 7 is connected to the vacuum pump 22, the air outlet end of the vacuum pump 22 is connected to the second energy recovery module 8, the second energy recovery module 8 includes a gas compression unit 23, the left side of the gas compression unit 23 is connected to the compressed gas storage unit 24, the top of the compressed gas storage unit 24 is connected to the energy conversion unit 25, the right side of the energy conversion unit 25 is connected to the electric energy storage unit 26, and the electric energy storage unit 26 is electrically connected to the home intelligent management module 3;

[0049] The first branch pipe 5 is divided into an upper water outlet pipe and a right water outlet pipe, and the upper water outlet end is located at the end of the upper water outlet pipe away from the sewage filtering unit 4, and the right water outlet end is located at the end of the lower water outlet pipe away from the sewage filtering unit 4. The outer walls of the upper water outlet pipe and the right water outlet pipe are respectively provided with first solenoid valves, and the first temperature sensor 11 is located on the left side of the first solenoid valve, and the first temperature sensor 11 is electrically connected to the first solenoid valve.

[0050] The second branch pipe 17 is used to discharge the sewage entering the heat exchanger 16. The second branch pipe 17 is divided into a left water outlet pipe and a lower water outlet pipe, and the left water outlet end is located at one end of the left water outlet pipe close to the sewage filtering unit 4, and the lower water outlet end is located at one end of the lower water outlet pipe close to the biological purification module 7. The outer walls of the left water outlet pipe and the lower water outlet pipe are respectively provided with second solenoid valves. A second temperature sensor 18 is provided in the second branch pipe 17. The second temperature sensor 18 is located above the second solenoid valve, and the second temperature sensor 18 is electrically connected to the second solenoid valve.

[0051] The vacuum pump 22 is used to collect the gas generated during the sewage purification process in the biological purification module 7, and transmit the gas to the second energy recovery module 8. The gas compression unit 23 includes a gas compressor, and the gas compression unit 23 is used to compress the collected gas. The compressed gas storage unit 24 is used to store the compressed gas. The energy conversion unit 25 is used to output the compressed gas and convert the kinetic energy of the compressed gas into electrical energy. The electrical energy storage unit 26 is used to store the converted electrical energy and supply the electrical energy to the sewage purification module 2.

[0052] Furthermore, the first set temperature for the first temperature sensor 11, the second set temperature for the second temperature sensor 18, and the third set temperature for the third sensor are set by the intelligent control module 1, wherein the first set temperature and the second set temperature are the temperatures at which the heat energy of the sewage can be recovered, and the second set temperature is lower than the first set temperature. The bathing sewage and kitchen sewage generated in the family life enter the sewage filter module through the pipeline, the sewage filter module filters the domestic sewage to remove impurities in the sewage, and then the domestic sewage after the impurities are filtered is pumped into the first branch pipe 5 by the water pump, and the first branch pipe 5 is connected to the first branch pipe 5. The temperature sensor 11 detects the sewage temperature. When the sewage temperature exceeds the first set temperature, the first solenoid valve on the upper outlet pipe in the first branch pipe 5 is opened, and the first solenoid valve on the right outlet pipe in the first branch pipe 5 is closed, and the sewage is transported to the first energy recovery module 6. Then, the hotter sewage in the first energy recovery module 6 is transported to the heat exchanger 16 through the water pump. The top of the heat exchanger 16 is respectively connected to the inlet and outlet of the household floor heating in the smart home. The heat transfer between the sewage and the household floor heating is realized through the heat exchanger 16, thereby realizing the purpose of recycling the heat energy in the household sewage.

[0053] The sewage passing through the heat exchanger 16 enters the second branch pipe 17, and the sewage temperature is detected by the second temperature sensor 18 in the second branch pipe 17. When the sewage temperature exceeds the second set temperature, the second solenoid valve on the left outlet pipe in the second branch pipe 17 is opened, and the second solenoid valve on the down pipe is closed, and the sewage is transported to the first energy recovery module 6 through the upper outlet pipe in the first branch pipe 5 again, and the heat energy in the domestic sewage is continuously recovered, so as to realize the full recovery and utilization of the heat energy of the domestic sewage;

[0054] When the temperature of the sewage in the first branch pipe 5 is lower than the first set temperature, the sewage enters the biological purification module 7 through the right outlet pipe. When the temperature of the sewage in the first branch pipe 5 is lower than the second set temperature, the sewage enters the biological purification module 7 through the lower outlet pipe. The biological purification module 7 is provided with sewage purification microorganisms. The organic matter in the domestic wastewater is decomposed by the decomposition of the microorganisms to achieve the purification of the domestic sewage, and gas is generated in the biological purification process. The carbon dioxide gas generated in the sewage purification process of the organisms in the biological purification module 7 is captured by the vacuum pump 22, and the gas is transported to the second energy recovery module 8. The captured gas is compressed by the gas compression device. The compressed gas is The gas is stored in the compressed gas storage unit 24, and then the kinetic energy of the gas is converted into electrical energy through the energy conversion unit 25, and the converted electrical energy is stored in the electrical energy storage unit 26. The electrical energy storage unit 26 is used to distribute the electrical energy to each module in the sewage purification module 2, and is used to supply the operation of the electrical equipment in the sewage purification module 2, thereby reducing the dependence of the sewage purification and recycling system on the external power supply, and reducing the system operation cost. The first energy recovery module 6 and the second energy recovery module 8 purify the domestic sewage while recycling the energy in the sewage, and reduce the emission of carbon dioxide gas generated during the sewage purification process, thereby improving the environmental friendliness of the domestic sewage purification and recycling system.

[0055] See also Figure 1 and Figure 3 An embodiment of the present invention is as follows: a household sewage purification and recycling system, wherein the first energy recovery module 6 comprises a hot water storage tank 12, a heat storage tank 13 is arranged outside the hot water storage tank 12, an insulation layer 14 is installed on the inner wall of the heat storage tank 13, an electric heating plate 15 is arranged inside the heat storage tank 13, and the electric heating plate 15 is located outside the hot water storage tank 12, and the electric heating plate 15 is electrically connected to the second energy recovery module 8.

[0056] Furthermore, by setting a third temperature sensor for detecting the temperature of sewage in the hot water storage tank, and obtaining the room temperature in the floor heating installation area of ​​the home through the home intelligent management module 3, when the room temperature is lower than the room temperature requirement set by family members, the electric energy storage unit 26 supplies electric energy to the electric heating plate 15, so that the electric heating plate 15 heats the sewage in the first energy recovery module 6, and the heated sewage enters the heat exchanger 16 again to exchange heat with the home floor heating, which is beneficial to further improve the utilization effect of domestic sewage, and the electric energy generated in the sewage purification module 2 is used to supply the electric heating plate 15 to work, thereby reducing the use cost of the household sewage purification and recycling system and the family living cost.

[0057] See also Figure 1, an embodiment provided by the present invention: a household sewage purification and recycling system, the second energy recovery module 8 also includes an energy storage management unit, the energy storage management unit is electrically connected to the battery energy storage unit, the energy storage management unit is used to monitor the power state in the battery energy storage unit, and distribute electric energy according to the power state, the energy storage management unit first reserves electric energy for the normal operation of the sewage purification module 2 in the battery energy storage module for the operation of the household sewage purification and recycling system, so as to ensure that the household sewage purification and recycling system maintains normal operation under emergencies such as less sewage to be treated and power outages, and improves the autonomous operation capability of the sewage purification and recycling system, and distributes electricity for the excess electric energy in the electric energy storage unit 26 through the home intelligent management module 3, so as to supply the operation of household appliances such as household lighting, thereby realizing full utilization of household sewage and efficient utilization of electric energy.

[0058] See also Figure 4 An embodiment of the present invention is: a household sewage purification and recycling system, the biological purification module 7 includes a biological aeration box 19, an aeration pipe 20 is arranged inside the biological aeration box 19, aeration holes are opened on the outer wall of the aeration pipe 20, and the aeration holes on the aeration pipe 20 located in the same horizontal plane are controlled by a group of third solenoid valves, a liquid level sensor 21 is arranged inside the biological aeration box 19, and the liquid level sensor 21 is electrically connected to the third solenoid valve.

[0059] Furthermore, by arranging the vertically installed aeration pipes 20, the decomposition products of organic matter produced during the biological sewage purification process are prevented from clogging the aeration holes, which is beneficial to maintaining the normal operation of the household sewage purification and recycling system. By setting the liquid level sensor 21 to detect the amount of sewage in the biological aeration tank 19, the third solenoid valve at the corresponding sewage height on the aeration pipe 20 is controlled to open according to the sewage amount, so that the aeration holes under the sewage water surface are in a connected state, and the aeration holes on the sewage water surface are in a closed state, which is beneficial to improving the aeration effect, and the household sewage in the biological purification module 7 is aerated through the aeration holes to generate gas.

[0060] See also Figure 1 and Figure 6An embodiment of the present invention is a household sewage purification and recycling system, wherein a pump body 27 is connected to the right side of the biological purification module 7, a water pipe 1 is connected to the right end of the pump body 27, a secondary sedimentation module 9 is connected to the right end of the water pipe, a flocculant delivery box is provided on the top of the secondary sedimentation module 9, and a stirring rod is provided inside the secondary sedimentation module 9. By adding flocculant into the secondary sedimentation module 9 and stirring, the sewage that has been decomposed by organic matter in the biological purification module 7 is flocculated and precipitated, and a filter is provided to filter the sewage in the secondary sedimentation module 9 before discharging it, a pump body 28 is connected to the right side of the secondary sedimentation module 9, a circulating water pipe 1 is connected to the right end of the pump body 28, and the circulating water pipe 1 is connected to the toilet flushing water pipe in the household water pipe. On the water pipe, the circulating water pipe 1 is used to output the sewage used by the secondary sedimentation module 9. The top of the secondary sedimentation module 9 is connected to the pump body 3 29, and the top of the pump body 3 29 is connected to the water pipe 3. The output end of the water pipe 3 is connected to the sewage disinfection module 10. The sewage disinfection module 10 is used to use an ultraviolet lamp to disinfect the sewage passing through the secondary sedimentation module 9. The right side of the sewage disinfection module 10 is connected to the pump body 4 30, and the right end of the pump body 4 30 is connected to the circulating water pipe 2, and the circulating water pipe 2 is used to output the sewage in the sewage disinfection module 10. When the circulating water pipe 2 is connected to the bathing and cleaning water pipe in the household water pipe, the household data includes the water consumption for washing clothes and bathing and flushing toilets. The home intelligent management module 3 is electrically connected to the pump body 2 28, the pump body 3 29 and the pump body 4 30.

[0061] Furthermore, by setting up a secondary sedimentation module 9 and a sewage disinfection module 10, domestic sewage is further purified to form a multi-level sewage treatment system, and by setting up a pump body three 29 to be electrically connected to the home intelligent management module 3, the amount of sewage transported from the secondary sedimentation module 9 to the sewage disinfection module 10 by the pump body three 29 is controlled according to the amount of water used for bathing and flushing toilets obtained in the home intelligent management module 3, so as to achieve the control of sewage purification treatment amounts at different levels in combination with household water demand, which is beneficial to improving the energy saving of the household sewage recycling system, increasing the mutual adaptability of the system and household water demand, and enabling the sewage purification and recycling system to be adaptively adjusted according to different households, so as to be more in line with the household water use habits.

[0062] Working principle: Bathing sewage and kitchen sewage generated in family life enter the sewage filtration module through pipes. The sewage filtration module filters the domestic sewage and removes impurities in the sewage. The sewage passing through the sewage filtration unit 4 enters the first branch pipe 5 through a water pump. When the first temperature sensor (11) detects that the sewage temperature reaches the set energy recovery temperature, the sewage enters the first energy recovery module 6 and the heat exchanger 16. Using the heat energy in the domestic sewage, the domestic sewage passing through the first energy recovery module 6 and the heat exchanger 16 enters the biological purification module 7 through the second branch pipe 17. The domestic sewage is purified again by microbial decomposition. The gas generated in the biological purification module 7 is obtained by the vacuum pump 22, and the gas is transmitted to the second energy recovery module 8. The second energy recovery module 8 converts the kinetic energy of the gas into electrical energy, which is stored in the electrical energy storage unit 26 and distributed to the sewage purification module 2. The sewage passing through the biological purification module 7 enters the secondary sedimentation tank, and the domestic sewage is precipitated and filtered by adding flocculants. The filtered sewage then enters the sewage disinfection module 10 for disinfection, and the disinfected sewage is discharged from the sewage purification module 2. The purified sewage is circulated to the household for cleaning, bathing and toilet flushing, thereby achieving the purpose of purifying and recycling household sewage and shortening the purification process of household sewage.

[0063] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A household sewage purification and recycling system, characterized in that: The intelligent control module (1) comprises a sewage purification module (2) and a home intelligent management module (3), wherein the intelligent control module (1) is used to control the sewage purification process of the sewage purification module (2), and the home intelligent management module (3) is used to obtain household data and manage the smart home, and the intelligent control module (1) is electrically connected to the home intelligent management module (3); The sewage purification module (2) comprises a sewage filtering unit (4), the sewage filtering unit (4) is connected to a first branch pipe (5) via a water pump, a first temperature sensor (11) is arranged inside the first branch pipe (5), an upper water outlet end of the first branch pipe (5) is connected to a first energy recovery module (6), a right water outlet end of the first branch pipe (5) is connected to a biological purification module (7), the first energy recovery module (6) is connected to a heat exchanger (16) via a water pump, a sewage outlet is arranged at the bottom of the heat exchanger (16), a second branch pipe (17) is connected to the bottom of the sewage outlet, a left water outlet end of the second branch pipe (17) is connected to the outer wall of the first branch pipe (5), a lower water outlet end of the second branch pipe (17) is connected to the biological purification module (7), and a home floor heating input pipe and a home floor heating output pipe are connected to the top of the heat exchanger (16); The top of the biological purification module (7) is connected to an air pump (22), the air outlet of the air pump (22) is connected to a second energy recovery module (8), the second energy recovery module (8) includes a gas compression unit (23), the left side of the gas compression unit (23) is connected to a compressed gas storage unit (24), the top of the compressed gas storage unit (24) is connected to an energy conversion unit (25), the right side of the energy conversion unit (25) is connected to an electric energy storage unit (26), and the electric energy storage unit (26) is electrically connected to the home intelligent management module 3.

2. A household sewage purification and recycling system according to claim 1, characterized in that: The first branch pipe (5) is divided into an upper water outlet pipe and a right water outlet pipe, and the upper water outlet end is located at an end of the upper water outlet pipe away from the sewage filtering unit (4), and the right water outlet end is located at an end of the lower water outlet pipe away from the sewage filtering unit (4), and the outer walls of the upper water outlet pipe and the right water outlet pipe are respectively provided with a first solenoid valve, and the first temperature sensor (11) is located on the left side of the first solenoid valve, and the first temperature sensor (11) is electrically connected to the first solenoid valve.

3. A household sewage purification and recycling system according to claim 1, characterized in that: The second branch pipe (17) is used to discharge sewage entering the heat exchanger (16). The second branch pipe (17) is divided into a left water outlet pipe and a lower water outlet pipe, and the left water outlet end is located at an end of the left water outlet pipe close to the sewage filtering unit (4), and the lower water outlet end is located at an end of the lower water outlet pipe close to the biological purification module (7). Second solenoid valves are respectively arranged on the outer walls of the left water outlet pipe and the lower water outlet pipe. A second temperature sensor (18) is arranged in the second branch pipe (17). The second temperature sensor (18) is located above the second solenoid valve, and the second temperature sensor (18) is electrically connected to the second solenoid valve.

4. A household sewage purification and recycling system according to claim 1, characterized in that: The vacuum pump (22) is used to collect gas generated during the sewage purification process in the biological purification module (7) and transmit the gas to the second energy recovery module (8). The gas compression unit (23) includes a gas compressor. The gas compression unit (23) is used to compress the collected gas. The compressed gas storage unit (24) is used to store the compressed gas. The energy conversion unit (25) is used to output the compressed gas and convert the kinetic energy of the compressed gas into electrical energy. The electrical energy storage unit (26) is used to store the converted electrical energy and supply the electrical energy to the sewage purification module (2).

5. A household sewage purification and recycling system according to claim 1, characterized in that: The first energy recovery module (6) comprises a hot water storage tank (12), a heat storage tank (13) is arranged outside the hot water storage tank (12), an inner wall of the heat storage tank (13) is installed with a heat insulation layer (14), an electric heating plate (15) is arranged inside the heat storage tank (13), and the electric heating plate (15) is located outside the hot water storage tank (12), and the electric heating plate (15) is electrically connected to the second energy recovery module (8).

6. A household sewage purification and recycling system according to claim 1, characterized in that: The biological purification module (7) comprises a biological aeration box (19), an aeration pipe (20) is arranged inside the biological aeration box (19), aeration holes are opened on the outer wall of the aeration pipe (20), and the aeration holes on the aeration pipe (20) located in the same horizontal plane are controlled by a group of third electromagnetic valves, and a liquid level sensor (21) is arranged inside the biological aeration box (19), and the liquid level sensor (21) is electrically connected to the third electromagnetic valve.

7. A household sewage purification and recycling system according to claim 1, characterized in that: The right side of the biological purification module (7) is connected to a pump body (27), the right end of the pump body (27) is connected to a water pipe (1), the right end of the water pipe is connected to a secondary sedimentation module (9), the secondary sedimentation module (9) is used to precipitate and filter the sewage after biological purification, the right side of the secondary sedimentation module (9) is connected to a pump body (28), the right end of the pump body (28) is connected to a circulating water pipe (1), the circulating water pipe (1) is used to output the sewage used by the secondary sedimentation module (9), the secondary sedimentation module ( The top of the secondary sedimentation module (9) is connected to a pump body 3 (29), the top of the pump body 3 (29) is connected to a water pipe 3, the output end of the water pipe 3 is connected to a sewage disinfection module (10), the sewage disinfection module (10) is used to use an ultraviolet lamp to disinfect the sewage that has passed through the secondary sedimentation module (9), the right side of the sewage disinfection module (10) is connected to a pump body 4 (30), the right end of the pump body 4 (30) is connected to a circulating water pipe 2, and the circulating water pipe 2 is used to output the sewage in the sewage disinfection module (10).

8. A household sewage purification and recycling system according to claim 1, characterized in that: The household data includes the water consumption for washing clothes, bathing and flushing toilets. The household intelligent management module (3) is electrically connected to the second pump body (28), the third pump body (29) and the fourth pump body (30).

9. A method for purifying and recycling domestic sewage, applicable to a system for purifying and recycling domestic sewage as claimed in any one of claims 1 to 8, characterized in that: The method for purifying and recycling household sewage is as follows: S1. Bathing sewage and kitchen sewage generated in household life enter the sewage filtration module through the pipeline. The sewage filtration module filters the household sewage and removes impurities in the sewage; S2, the sewage that has passed through the sewage filter unit (4) enters the first branch pipe (5) through a water pump, and when the first temperature sensor (11) detects that the sewage temperature reaches a set energy recovery temperature, the sewage enters the first energy recovery module (6) and the heat exchanger (16), and the heat energy in the domestic sewage is utilized; S3, the domestic sewage that has passed through the first energy recovery module (6) and the heat exchanger (16) enters the biological purification module (7) through the second branch pipe (17), and the domestic sewage is purified again by microbial decomposition, and the gas generated in the biological purification module (7) is obtained by the suction pump (22), and the gas is transmitted to the second energy recovery module (8); S4, the second energy recovery module (8) converts the kinetic energy of the gas into electrical energy, stores it in the electrical energy storage unit (26) and distributes it to the sewage purification module (2); S5. The sewage passing through the biological purification module (7) enters the secondary sedimentation tank, where the biological sewage is precipitated and filtered by adding flocculants. The filtered sewage then enters the sewage disinfection module (10) for disinfection, and the disinfected sewage is discharged from the sewage purification module (2).

10. A method for purifying and recycling domestic sewage according to claim 9, characterized in that: In S2, the following steps are also included: S21, the heat exchanger (16) is connected to the household floor heating, and the household floor heating is electrically connected to the home intelligent management module (3); In S4, the following steps are also included: S41, the home intelligent management module (3) distributes the electric energy in the electric energy storage unit (26); In S5, the following steps are also included: S51, controlling the pump body 3 (29) to transport the sewage in the secondary sedimentation module (9) to the sewage disinfection module (10) according to the household data obtained by the furniture intelligent management module.

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