Low-carbon zero-emission sewer-free toilet system

Abstract

The invention provides a low-carbon zero-emission sewer-free toilet system, which relates to the technical field of sewage treatment, and comprises a source separation ecological toilet for separating urine and excrement from the source; the pretreatment device is used for pretreating the urine; the solar heat collector is used for heating urine by using solar energy; the feeding hole of the first container is communicated with the discharging hole of the solar heat collector. The membrane distillation device is used for distilling the heated urine; the excrement collecting tank is used for collecting and storing source separated excrement; the biological flocculation basin is used for carrying out solid-liquid separation on the excrement; the material storage tank is used for storing concentrated liquid after solid-liquid separation; the reactor is used for preheating the concentrated liquid and generating a hydrothermal reaction; and the product separation unit is used for separating hydrothermal reaction products. By means of the arrangement, urine and excrement can be separated from the source, recycling of toilet excrement is achieved, fertilizer resources and water consumption are saved, and the independent sewer-free toilet system can also provide technical support for toilet system requirements of people in a sewer-free scene in China.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and in particular relates to a "low-carbon, zero-discharge" sewer-free toilet system. Background Art

[0002] Toilets are the most important and common sanitary facilities in daily life. In my country's rural revitalization and beautiful countryside construction, household toilet renovation has become one of the important indicators for achieving a well-off society in an all-round way with high quality. However, there is still a huge gap in the demand for toilets in rural areas without municipal sewers, scattered farmers, parks, scenic spots, farms, forest farms and grasslands, which cannot effectively meet the people's demand for hygienic, comfortable and convenient toilets.

[0003] Currently, the widely used dry toilets without sewers usually have a foul smell, breed mosquitoes and flies, and even easily cause the spread of diseases, which seriously threatens environmental hygiene and people's health. The disorderly stacking of feces and sewage in dry toilets easily produces CO 2 , CH 4 and other greenhouse gases, which is not conducive to the achievement of the global "dual carbon" goals. Although dry toilet composting can improve the efficiency of fecal waste resource utilization, sanitation problems are usually not easy to solve. Flush toilets are often used for low-cost renovation of dry toilets, but on the one hand, they require a lot of water for flushing, which greatly wastes water resources; on the other hand, flushing brings a lot of sewage. Because the amount of water is too large, it is no longer suitable for composting in dry toilets. The lack of municipal pipelines means the lack of sewage treatment facilities, which brings serious potential pollution problems. Sewage treatment facilities can be added in the renovation of water flush toilets. Aerobic sewage treatment will lead to the loss of resources such as nitrogen and phosphorus. Organic matter is oxidized to CO after treatment. 2 , and wastewater treatment consumes energy, which is an unsustainable manure management model. Although anaerobic treatment of manure can produce biogas, there are also problems with biogas management and utilization. Biogas escape will also cause carbon emissions, and there is a lack of corresponding assessment. Both aerobic and anaerobic treatments will cause carbon emissions.

[0004] The non-sewered sanitation system emphasizes resource-based processing technology, which can convert human waste into organic fertilizer or energy, realize resource recycling, reduce waste emissions, comply with the country's green and low-carbon requirements and strategies, and play an important role in reducing water pollution and protecting the environment. Summary of the invention

[0005] The purpose of the present invention is to provide a "low-carbon, zero-emission" sewer-free toilet system to achieve resource processing of urine and feces.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a "low-carbon, zero-discharge" sewer-free toilet system, comprising:

[0007] Source separation ecological toilets separate urine and feces from the source;

[0008] A pretreatment device, the feed inlet of which is connected to the urine drainage outlet of the source separation ecological toilet, and is used for adding medicine, stirring and static sedimentation treatment of the source separation urine;

[0009] A solar collector, the feed port of which is connected to the discharge port of the pretreatment device, and utilizes solar energy to heat the urine in the pretreatment device;

[0010] A first container, the feed port of which is connected to the discharge port of the solar thermal collector;

[0011] A membrane distillation device, used for distilling the heated urine to form a concentrated liquid and a distillate from the urine, the membrane distillation device comprising a urine inlet, a concentrated liquid outlet and a distillate outlet, the urine inlet is connected to the discharge port of the first container, and the concentrated liquid outlet is connected to the feed port of the first container;

[0012] A feces collection tank, the feed inlet of which is connected to the feces discharge outlet of the source separation ecological toilet and is used to collect and store source-separated feces;

[0013] A biological flocculation tank, the feed inlet of which is connected to the discharge outlet of the manure collection tank, for performing solid-liquid separation on the source-separated manure;

[0014] A storage tank, the feed port of which is connected to the discharge port of the biological flocculation tank, and is used to store the concentrated liquid of the biological flocculation tank;

[0015] A reactor, the feed port of which is connected to the discharge port of the storage tank, for preheating the concentrated solution and generating a hydrothermal reaction;

[0016] A product separation unit, whose feed port is connected to the discharge port of the reactor, is used to separate the hydrothermal reaction product.

[0017] According to a "low-carbon, zero-emission" non-sewered toilet system provided by the present invention, the pretreatment device includes a stirring mechanism and a pH value detection device;

[0018] The stirring mechanism is used to stir the urine;

[0019] The pH value detection device is used to detect the pH value of the urine.

[0020] According to a "low-carbon, zero-emission" non-sewered toilet system provided by the present invention, the pretreatment device also includes a urine stabilization container and a sedimentation container that are interconnected;

[0021] The urine stabilization container is provided with a drug adding port, so as to add a stabilizer into the urine stabilization container through the drug adding port, and the stirring mechanism and the pH value detection device are both provided in the urine stabilization container;

[0022] The sedimentation container is used for urine to be statically precipitated, and the discharge port of the sedimentation container is communicated with the feed port of the solar thermal collector.

[0023] A "low-carbon, zero-emission" non-sewered toilet system according to the present invention also includes a first water pump, a filtering device and a second water pump;

[0024] The feed inlet of the first water pump is communicated with the discharge port of the pretreatment device, and the discharge port of the first water pump is communicated with the feed inlet of the solar thermal collector;

[0025] The filtering device is arranged between the discharge port of the first water pump and the solar collector to filter the urine discharged from the discharge port of the first water pump;

[0026] The feed inlet of the second water pump is communicated with the discharge outlet of the first container.

[0027] A "low-carbon, zero-emission" non-sewered toilet system provided according to the present invention also includes a second container, and the feed port of the second container is connected to the distillate discharge port.

[0028] According to a "low-carbon, zero-emission" non-sewered toilet system provided by the present invention, the membrane distillation device includes a direct contact membrane distiller or an air gap membrane distiller;

[0029] The direct contact membrane distiller comprises a cooling liquid inlet and a cooling liquid outlet, the cooling liquid inlet of the direct contact membrane distiller is connected to the discharge port of the second container, the cooling liquid outlet of the direct contact membrane distiller constitutes the distillate outlet, and is connected to the feed port of the second container;

[0030] Alternatively, the air-gap membrane distiller comprises the distillate outlet, the cooling liquid inlet and the cooling liquid outlet, the cooling liquid inlet of the air-gap membrane distiller is connected to the discharge port of the second container, and the cooling liquid outlet of the air-gap membrane distiller is connected to the feed port of the second container.

[0031] A "low-carbon, zero-emission" non-sewered toilet system according to the present invention also includes a cooler;

[0032] The cooler is disposed between the cooling liquid inlet of the direct contact membrane distiller and the second container, or between the cooling liquid inlet of the air gap membrane distiller and the second container, to cool the distillate.

[0033] According to a "low-carbon, zero-emission" non-sewered toilet system provided by the present invention, the membrane distillation device includes an air-swept membrane distiller and a first condenser;

[0034] The air-swept membrane distiller comprises a sweeping gas inlet and a water vapor exhaust port, wherein the sweeping gas inlet is used to communicate with a gas source, the water vapor exhaust port is connected to the air inlet of the first condenser, and the discharge port of the first condenser constitutes the distillate discharge port;

[0035] Alternatively, the membrane distillation apparatus comprises a vacuum membrane distiller and a second condenser;

[0036] The vacuum membrane distiller comprises a water vapor outlet, which is communicated with the second condenser. The exhaust port of the second condenser is used to communicate with the air extraction device, and the liquid discharge port of the second condenser constitutes the distillate outlet.

[0037] According to a "low-carbon, zero-emission" non-sewered toilet system provided by the present invention, the reactor comprises a preheating reactor and a heat preservation reactor which are interconnected;

[0038] The feed inlet of the preheating reactor is connected to the discharge outlet of the storage tank, and is used for preheating the concentrated solution in the storage tank;

[0039] The heat preservation reactor is used to cause the heated concentrated solution to undergo a hydrothermal reaction, and the discharge port of the heat preservation reactor is connected to the feed port of the product separation unit.

[0040] A "low-carbon, zero-discharge" non-sewered toilet system according to the present invention also includes a screw pump;

[0041] The feed port of the screw pump is communicated with the discharge port of the storage tank, and the discharge port of the screw pump is communicated with the feed port of the reactor, so as to introduce the concentrated solution in the storage tank into the reactor.

[0042] The beneficial effects of the present invention are as follows: this "low-carbon, zero-discharge" non-sewered toilet system has the characteristics of low energy consumption, easy maintenance, and low cost. It can separate urine and feces from the source. After urine treatment, it can meet the requirements of sanitary resource utilization. After feces solid organic matter treatment, it can be used as land fertilizer, thereby realizing the resource utilization of toilet feces, providing fertility for the soil, solving the problem of land barrenness, saving fertilizer resources and water consumption, and having very significant economic benefits. More importantly, the use of an independent non-sewered toilet system can greatly reduce the complete set of technologies and key equipment required for municipal pipe network construction, and provide technical support for meeting the toilet system needs of the people in my country's non-sewered scenes. In terms of environmental benefits, this kind of ecological and environmentally friendly toilet has no pollutant emissions, which helps to reduce pollutants such as chemical oxygen demand COD, nitrogen and phosphorus. At the same time, it can reduce the carbon emission problem in the sewage treatment of traditional dry toilets or water-flushing toilets, improve the sanitation level of the human living environment, and serve human health. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is an overall schematic diagram of the "low-carbon, zero-emission" sewer-free toilet system provided by the present invention.

[0044] Figure 2 It is a structural schematic diagram of the direct contact membrane distiller provided by the present invention;

[0045] Figure 3 It is a schematic structural diagram of the air gap type membrane distiller provided by the present invention;

[0046] Figure 4 It is a structural schematic diagram of the air-sweeping membrane distiller provided by the present invention;

[0047] Figure 5 It is a structural schematic diagram of the vacuum membrane distiller provided by the present invention.

[0048] In the figure: 1. Source separation ecological toilet; 2. Urine stabilization container; 3. Sedimentation container; 4. Solar collector; 5. First container; 6. Membrane distillation device; 7. Urine inlet; 8. Concentrate outlet; 9. Distillate outlet; 10. Second container; 11. Manure collection tank; 12. Bioflocculation tank; 13. Storage tank; 14. Preheating reactor; 15. Insulation reactor; 16. Product separation unit; 17. Dosing port; 18. pH value detection device; 19. Stirring mechanism; 20. First water pump; 21. Second water pump; 22. Third water pump; 23. Screw pump; 24. Direct contact membrane distiller; 25. Hydrophobic microporous membrane; 26. Air gap membrane distiller; 27. Cold wall; 28. Air sweep membrane distiller; 29. ​​First condenser; 30. Vacuum membrane distiller; 31. Second condenser; 32. Vacuum device. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely in conjunction with the accompanying drawings of the present invention. 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.

[0050] Combine the following Figure 1 — Figure 5 The "low-carbon, zero-emission" non-sewered toilet system provided in the embodiments of the present invention is described.

[0051] Specifically, the "low-carbon, zero-emission" sewer-free toilet system includes a source separation ecological toilet 1, a pretreatment device, a solar collector 4, a first container 5, a membrane distillation device 6, a feces collection tank 11, a biological flocculation tank 12, a storage tank 13, a reactor, and a product separation unit 16.

[0052] Among them, the source separation ecological toilet 1 is used to separate urine and feces from the source.

[0053] The feed inlet of the pretreatment device is connected to the urine discharge outlet of the source separation ecological toilet, and is used for adding medicine, stirring and static sedimentation treatment of the source separation urine.

[0054] The feed port of the solar heat collector 4 is connected to the discharge port of the pretreatment device, and the urine in the pretreatment device is heated by solar energy.

[0055] The feed port of the first container 5 is communicated with the discharge port of the solar thermal collector 4 .

[0056] The membrane distillation device 6 is used to distill the heated urine to form a concentrated liquid and a distillate. The membrane distillation device 6 includes a urine inlet 7, a concentrated liquid outlet 8, and a distillate outlet 9. The urine inlet 7 is connected to the outlet of the first container 5, and the concentrated liquid outlet 8 is connected to the feed inlet of the first container 5.

[0057] The feed inlet of the feces collection tank 11 is connected to the feces discharge outlet of the source separation ecological toilet 1, and is used to collect and store source separated feces.

[0058] The feed inlet of the biological flocculation tank 12 is connected to the discharge outlet of the feces collection tank 11, and is used for solid-liquid separation of source separated feces.

[0059] The feed inlet of the storage tank 13 is communicated with the discharge outlet of the biological flocculation tank 12 , and is used for storing the concentrated liquid of the biological flocculation tank 12 .

[0060] The feed inlet of the reactor is connected to the discharge outlet of the storage tank 13 for preheating the concentrated solution and generating a hydrothermal reaction.

[0061] The feed inlet of the product separation unit 16 is connected to the discharge port of the reactor for separating the hydrothermal reaction product.

[0062] Membrane distillation technology and hydrothermal reaction belong to the content of prior art. The principle of membrane distillation technology is: water molecules in the hot side liquid evaporate and vaporize, pass through the micropores of the hydrophobic microporous membrane 25 to enter the cold side, and non-volatile solutes such as ions and molecules in the water phase cannot pass through the hydrophobic membrane, thereby achieving the purpose of solution separation, concentration or purification.

[0063] Hydrothermal reaction refers to an effective method for inorganic synthesis and material processing in which an aqueous solution is used as the reaction system in a specially designed closed reactor. By heating and pressurizing the reaction system, a relatively high temperature and high pressure reaction environment is created, so that normally insoluble or insoluble substances can be dissolved and recrystallized.

[0064] The "low-carbon, zero-emission" sewer-free toilet system provided in the embodiment of the present invention separates urine and feces from the source through a source separation ecological toilet. In the pretreatment device, the urine is treated by dosing, stirring and static sedimentation. By adding a stabilizer to the urine, the urine is stabilized to avoid the hydrolysis of urea in the urine and reduce the odor produced by the hydrolysis of urea. Static sedimentation can remove solid matter in the urine. The supernatant after static sedimentation is introduced into a solar collector for heating. The urine in the solar collector is then introduced into a first container, and then introduced into a membrane distillation device for distillation, the concentrated liquid is introduced into the first container, and the distillate is discharged from the distillate outlet. After the feces are collected, they enter the biological flocculation tank to achieve solid-liquid separation. The separated concentrated liquid is then introduced into a storage tank, and then introduced into a reactor for preheating and hydrothermal reaction. The reaction product is separated into hydrothermal carbon and nutrient solution in the product separation unit.

[0065] Through source separation ecological toilets, urine and feces are separated from the source. After urine treatment, it can meet the requirements of sanitary resource utilization. After feces solid organic matter is treated, it can be used as land fertilizer, thus realizing the resource utilization of toilet feces, providing fertility for the soil, solving the problem of land barrenness, saving fertilizer resources and water consumption, and having very significant economic benefits. More importantly, the use of independent non-sewered toilet systems can greatly reduce the complete set of technologies and key equipment required for municipal pipe network construction, and provide technical support to meet the toilet system needs of the people in my country's non-sewered scenes. In terms of environmental benefits, this type of ecological and environmentally friendly toilet has no pollutant emissions, which helps to reduce chemical oxygen demand COD, nitrogen and phosphorus pollutants. At the same time, it can reduce carbon emissions in sewage treatment of traditional dry toilets or water-flushing toilets, improve the sanitation level of the living environment, and serve human health.

[0066] Optionally, the solar thermal collector may be configured as a vacuum tube type collector, or a flat plate type collector.

[0067] Optionally, the hydrophobic microporous membrane 25 can be polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polysulfone (PSF), polyethersulfone (PES), polypropylene (PP) or a copolymer mixed matrix membrane. The micropore diameter of the hydrophobic microporous membrane 20 is 0.01 μm to 0.1 μm.

[0068] In some embodiments provided by the present invention, the pretreatment device includes a stirring mechanism 19 and a pH value detection device 18 .

[0069] The stirring mechanism 19 is used to stir the urine so that the medicine in the urine can be quickly dissolved after the medicine is added. For example, the stirring mechanism 19 may include a stirring blade and a motor. The output shaft of the motor is transmission-connected with the stirring blade to drive the stirring blade to rotate.

[0070] The pH value detection device 18 is used to detect the pH value of urine. For example, the pH value detection device 18 can be a pH detector.

[0071] Stabilizers, such as calcium hydroxide and / or sodium hydroxide, are added to the urine and stirred by the stirring mechanism 19 so that the stabilizer can be quickly dissolved and evenly distributed. The pH value detection device 18 can detect the pH value of the urine, and the addition of the stabilizer is stopped when the pH value of the urine is greater than or equal to 10.5.

[0072] In some embodiments provided by the present invention, the pretreatment device further comprises a urine stabilization container 2 and a precipitation container 3 which are interconnected. The container described herein includes but is not limited to a tank, a pool or a tank.

[0073] The urine stabilization container 2 is provided with a drug adding port 17, so that a stabilizer can be added into the urine stabilization container 2 through the drug adding port 17. The stirring mechanism 19 and the pH value detection device 18 are both provided in the urine stabilization container 2.

[0074] The sedimentation container is used for urine to settle, and the discharge port of the sedimentation container is connected with the feed port of the solar collector. The bottom of the sedimentation container 3 is provided with a discharge port for discharging sediment.

[0075] During use, the urine in the collection device is introduced into the urine stabilization container 2, a stabilizer is added and stirred, and then the urine with the stabilizer added is introduced into the precipitation container 3 for static precipitation. The precipitate in the precipitation container 3 is discharged through the discharge port, and the supernatant in the precipitation container 3 is introduced into the solar collector 4 for heating. The heated urine is introduced into the first container 5, and then introduced into the membrane distillation device 6 for distillation and concentration. The urine distilled and concentrated by the membrane distillation device 6 is then introduced into the first container 5 to facilitate multiple concentrations of the urine.

[0076] By providing a urine stabilization container 2, a sedimentation container 3 and a solar collector 4, the urine in each container can be processed accordingly synchronously, and the working states of the three containers can be non-interfering with each other, thereby improving the urine processing efficiency and processing quality.

[0077] Optionally, a conical structure is provided at the bottom of the sedimentation container 3, and the cross section of the conical structure gradually decreases from top to bottom. The discharge port of the sediment is provided on the conical structure. The conical structure is provided to facilitate the collection of the sediment.

[0078] In some embodiments provided by the present invention, the “low-carbon, zero-emission” non-sewered toilet system further includes a first water pump 20 , a filtering device and a second water pump 21 .

[0079] The feed port of the first water pump 20 is communicated with the discharge port of the pretreatment device, and the discharge port of the first water pump 20 is communicated with the feed port of the solar collector 4. The urine in the pretreatment device is introduced into the solar collector 4 through the first water pump 20 for heating.

[0080] The filter device is disposed between the discharge port of the first water pump 20 and the solar collector 4 to filter the urine discharged from the discharge port of the first water pump 20. The filter device can prevent solid impurities and the like from entering the solar collector 4, causing the solar collector 4 to be blocked and affecting the heating efficiency. Optionally, the filter device can be a security filter.

[0081] The feed port of the second water pump 21 is connected to the discharge port of the first container 5. The urine in the first container 5 is introduced into the membrane distillation device 6 by the second water pump 21 for distillation.

[0082] In some embodiments provided by the present invention, the membrane distillation device 6 includes a direct contact membrane distiller 24. The direct contact membrane distiller includes a cooling liquid inlet and a cooling liquid outlet. The cooling liquid inlet of the direct contact membrane distiller is connected to the discharge port of the second container, and the cooling liquid outlet of the direct contact membrane distiller constitutes a distillate outlet and is connected to the feed port of the second container.

[0083] refer to Figure 2 As shown, in the direct contact membrane distiller 24, one side of the hydrophobic microporous membrane 25 is in direct contact with the heated urine, and the other side is in direct contact with the cooling liquid. The water vapor in the urine passes through the hydrophobic microporous membrane 25 and directly contacts with the cooling liquid to be condensed. At this time, the cooling liquid outlet of the direct contact membrane distiller 24 constitutes the above-mentioned distillate outlet 9.

[0084] Furthermore, the distillate in the second container 10 can be introduced into the cooling liquid inlet of the direct contact membrane distiller 24 by the third water pump 22 to condense the water vapor passing through the hydrophobic microporous membrane 25, thereby eliminating the need to use external water sources and achieving the effect of saving water resources.

[0085] Of course, the membrane distillation device 6 is not limited to the above-mentioned direct contact membrane distiller 24. For example, in other embodiments provided by the present invention, the membrane distillation device 6 includes an air gap membrane distiller 26. The air gap membrane distiller includes the above-mentioned distillate outlet 9, the cooling liquid inlet and the cooling liquid outlet. The cooling liquid inlet of the air gap membrane distiller is connected to the discharge port of the second container, and the cooling liquid outlet of the air gap membrane distiller is connected to the feed port of the second container.

[0086] refer to Figure 3 As shown, unlike the direct contact membrane distiller 24, the air gap membrane distiller 26 has a cavity between the cooling liquid channel and the hydrophobic microporous membrane 25, and the distillate outlet 9 is connected to the cavity. The water vapor in the urine enters the cavity after passing through the hydrophobic microporous membrane 25, and condenses into water droplets in the cavity by contacting the cold wall 27, and is discharged from the distillate outlet 9 after converging.

[0087] Furthermore, the distillate in the second container 10 can be introduced into the cold side of the air gap membrane distiller 26 by the third water pump 22 to condense the water vapor passing through the hydrophobic microporous membrane 25, thereby eliminating the need to use external water sources and achieving the effect of saving water resources.

[0088] In some embodiments provided by the present invention, the source separation urine treatment device further includes a cooler.

[0089] The cooler is disposed between the cooling liquid inlet of the direct contact membrane distiller 24 and the second container 10. Alternatively, the cooler is disposed between the cooling liquid inlet of the air gap membrane distiller 26 and the second container 10. The cooler is used to cool the distillate. The cooled distillate is introduced into the membrane distillation device 6 to cool the water vapor, which can improve the condensation effect of the water vapor, thereby improving the distillation efficiency of the urine.

[0090] Optionally, a first flow meter and a first flow valve are provided between the first container 5 and the urine inlet 7 of the membrane distillation device 6, and a second flow meter and a second flow valve are provided between the third water pump 22 and the coolant inlet of the membrane distillation device 6. The first flow meter and the second flow meter can detect the amount of urine and coolant entering the membrane distillation device 6, respectively. The first flow valve and the second flow valve can adjust the urine flow and the coolant flow, respectively.

[0091] In some embodiments provided by the present invention, the membrane distillation device 6 includes a gas-swept membrane distiller 28 and a first condenser 29 .

[0092] like Figure 4 As shown, the air-swept membrane distiller 28 includes a purge gas inlet and a water vapor exhaust port. The purge gas inlet is used to communicate with the gas source, and the water vapor exhaust port is connected to the air inlet of the first condenser. The discharge port of the first condenser constitutes the distillate discharge port. Figure 4 As shown, the right side of the hydrophobic microporous membrane of the air-swept membrane distiller is a cavity, and the sweeping gas inlet and the water vapor exhaust port are both connected to the cavity. When the water vapor enters the cavity through the hydrophobic microporous membrane, the gas blown out by the gas source is brought into the first condenser to condense into liquid and discharged from the drain port.

[0093] Of course, the membrane distillation device 6 is not limited to the form of the above-mentioned air-sweeping membrane distiller 28. For example, in other embodiments provided by the present invention, the membrane distillation device 6 includes a vacuum membrane distiller 30 and a second condenser 31.

[0094] refer to Figure 5 As shown, the vacuum membrane distiller 30 includes a water vapor outlet. The water vapor outlet is communicated with the second condenser, and the exhaust port of the second condenser is used to communicate with the exhaust device 32. The discharge port of the second condenser constitutes a distillate outlet. The exhaust device 32 can be a vacuum pump. Through the suction action of the vacuum pump, the water vapor that permeates the hydrophobic microporous membrane enters the second condenser from the water vapor outlet to condense into liquid and is discharged from the discharge port.

[0095] In some embodiments provided by the present invention, the reactor includes a preheating reactor 14 and a heat preservation reactor 15 which are interconnected.

[0096] The feed inlet of the preheating reactor 14 is communicated with the discharge outlet of the storage tank 13 , and the concentrated solution in the storage tank 13 is heated by the preheating reactor.

[0097] The heat preservation reactor 15 is used to cause the heated concentrated solution to undergo a hydrothermal reaction, and the discharge port of the heat preservation reactor 15 is connected to the feed port of the product separation unit 16 .

[0098] During use, the concentrated solution in the storage tank 13 is introduced into the preheating reactor 14 for preheating, and the preheated concentrated solution is introduced into the heat preservation reactor for hydrothermal reaction under high temperature and high pressure.

[0099] Optionally, the hydrothermal reaction temperature may be 180° C. to 400° C., and the pressure may be between 1 MPa and 30 MPa.

[0100] In some embodiments provided by the present invention, the “low-carbon, zero-emission” non-sewered toilet system also includes a screw pump 23.

[0101] The feed port of the screw pump 23 is communicated with the discharge port of the storage tank 13, and the discharge port of the screw pump 23 is communicated with the feed port of the reactor. The screw pump 23 can introduce the concentrated solution in the storage tank 13 into the reactor.

[0102] Through source separation ecological toilets, urine and feces can be separated from the source. After urine treatment, it can meet the requirements of sanitary resource utilization. After feces solid organic matter is treated, it can be used as land fertilizer, thus realizing the resource utilization of toilet feces, providing fertility for the soil, solving the problem of land barrenness, saving fertilizer resources and water consumption, and having very significant economic benefits. More importantly, the use of independent non-sewered toilet systems can greatly reduce the complete set of technologies and key equipment required for municipal pipe network construction, and provide technical support to meet the toilet system needs of the people in my country's non-sewered scenes. In terms of environmental benefits, this kind of ecological and environmentally friendly toilet has no pollutant emissions, which helps to reduce pollutants such as chemical oxygen demand COD, nitrogen and phosphorus. At the same time, it can reduce carbon emissions in sewage treatment of traditional dry toilets or water-flushing toilets, improve the sanitation level of the living environment, and serve human health.

[0103] It is understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A "low-carbon, zero-emission" non-sewered toilet system, characterized in that: include: Source separation ecological toilets separate urine and feces from the source; A pretreatment device, the feed inlet of which is connected to the urine drainage outlet of the source separation ecological toilet, and is used for adding medicine, stirring and static sedimentation treatment of the source separation urine; A solar collector, the feed port of which is connected to the discharge port of the pretreatment device, and utilizes solar energy to heat the urine in the pretreatment device; A first container, the feed port of which is connected to the discharge port of the solar thermal collector; A membrane distillation device, used for distilling the heated urine to form a concentrated liquid and a distillate from the urine, the membrane distillation device comprising a urine inlet, a concentrated liquid outlet and a distillate outlet, the urine inlet is connected to the discharge port of the first container, and the concentrated liquid outlet is connected to the feed port of the first container; A feces collection tank, the feed inlet of which is connected to the feces discharge outlet of the source separation ecological toilet and is used to collect and store source-separated feces; A biological flocculation tank, the feed inlet of which is connected to the discharge outlet of the manure collection tank, for performing solid-liquid separation on the source-separated manure; A storage tank, the feed port of which is connected to the discharge port of the biological flocculation tank, and is used to store concentrated liquid after solid-liquid separation; A reactor, the feed port of which is connected to the discharge port of the storage tank, for preheating the concentrated solution and generating a hydrothermal reaction; A product separation unit, whose feed port is connected to the discharge port of the reactor, is used to separate the hydrothermal reaction product.

2. The "low-carbon, zero-emission" non-sewered toilet system according to claim 1 is characterized in that: The pretreatment device includes a stirring mechanism and a pH value detection device; The stirring mechanism is used to stir the urine; The pH value detection device is used to detect the pH value of the urine.

3. The "low-carbon, zero-emission" non-sewered toilet system according to claim 2 is characterized in that: The pretreatment device also includes a urine stabilization container and a precipitation container which are interconnected; The urine stabilization container is provided with a drug adding port, so as to add a stabilizer into the urine stabilization container through the drug adding port, and the stirring mechanism and the pH value detection device are both provided in the urine stabilization container; The sedimentation container is used for urine to be statically precipitated, and the discharge port of the sedimentation container is communicated with the feed port of the solar thermal collector.

4. The "low-carbon, zero-emission" non-sewered toilet system according to claim 1 is characterized in that: Also includes a first water pump, a filtering device and a second water pump; The feed inlet of the first water pump is communicated with the discharge port of the pretreatment device, and the discharge port of the first water pump is communicated with the feed inlet of the solar thermal collector; The filtering device is arranged between the discharge port of the first water pump and the solar collector to filter the urine discharged from the discharge port of the first water pump; The feed inlet of the second water pump is communicated with the discharge outlet of the first container.

5. The "low-carbon, zero-emission" non-sewered toilet system according to claim 1 is characterized in that: The invention also comprises a second container, wherein a feed port of the second container is connected with the distillate discharge port.

6. The "low-carbon, zero-emission" non-sewered toilet system according to claim 5 is characterized in that: The membrane distillation device comprises a direct contact membrane distiller or an air gap membrane distiller; The direct contact membrane distiller comprises a cooling liquid inlet and a cooling liquid outlet, the cooling liquid inlet of the direct contact membrane distiller is connected to the discharge port of the second container, the cooling liquid outlet of the direct contact membrane distiller constitutes the distillate outlet, and is connected to the feed port of the second container; Alternatively, the air-gap membrane distiller comprises the distillate outlet, the cooling liquid inlet and the cooling liquid outlet, the cooling liquid inlet of the air-gap membrane distiller is connected to the discharge port of the second container, and the cooling liquid outlet of the air-gap membrane distiller is connected to the feed port of the second container.

7. The "low-carbon, zero-emission" non-sewered toilet system according to claim 6 is characterized in that: Also includes a cooler; The cooler is disposed between the cooling liquid inlet of the direct contact membrane distiller and the second container, or between the cooling liquid inlet of the air gap membrane distiller and the second container, to cool the distillate.

8. The "low-carbon, zero-emission" non-sewered toilet system according to claim 1 is characterized in that: The membrane distillation device comprises a gas-sweeping membrane distiller and a first condenser; The air-swept membrane distiller comprises a sweeping gas inlet and a water vapor exhaust port, wherein the sweeping gas inlet is used to communicate with a gas source, the water vapor exhaust port is connected to the air inlet of the first condenser, and the discharge port of the first condenser constitutes the distillate discharge port; Alternatively, the membrane distillation apparatus comprises a vacuum membrane distiller and a second condenser; The vacuum membrane distiller comprises a water vapor outlet, which is communicated with the second condenser. The exhaust port of the second condenser is used to communicate with the air extraction device, and the liquid discharge port of the second condenser constitutes the distillate outlet.

9. The "low-carbon, zero-emission" non-sewered toilet system according to claim 1 is characterized in that: The reactor comprises a preheating reactor and a heat preservation reactor which are interconnected; The feed inlet of the preheating reactor is connected to the discharge outlet of the storage tank, and is used for preheating the concentrated solution; The heat preservation reactor is used to cause the heated concentrated solution to undergo a hydrothermal reaction, and the discharge port of the heat preservation reactor is connected to the feed port of the product separation unit.

10. The "low-carbon, zero-emission" non-sewered toilet system according to claim 1 is characterized in that: Also included are progressive cavity pumps; The feed port of the screw pump is communicated with the discharge port of the storage tank, and the discharge port of the screw pump is communicated with the feed port of the reactor, so as to introduce the concentrated solution in the storage tank into the reactor.

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