Fecal sewage treatment system

Abstract

The utility model provides a fecal sewage treatment system which comprises an aeration unit which is configured to perform aeration treatment on fecal sewage; the evaporation unit is arranged on the downstream side of the aeration unit and communicated with the aeration unit, and the evaporation unit is configured to perform evaporation treatment on the fecal sewage treated by the aeration unit; the drying unit is communicated with the evaporation unit, and the drying unit is configured to perform drying treatment on the materials treated by the evaporation unit; the moisture collecting unit is respectively communicated with the evaporation unit and the drying unit; and the heat pump unit communicates with the moisture collecting unit, and the heat pump unit is configured to provide a heat exchange medium for the moisture collecting unit so as to cool and liquefy the steam entering the moisture collecting unit. The fecal sewage treatment system disclosed by the utility model can reduce the pollution of fecal sewage to the environment and improve the cyclic utilization rate of water resources, and is suitable for treating the fecal sewage with higher concentration and difficulty in treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of feces treatment, in particular to a feces sewage treatment system. Background Art

[0002] With the development of urbanization and industrialization, vacuum collection systems for feces are widely used in mobile cabin toilets, public toilets, trains, airplanes and other places, generating a large amount of feces sewage. Since feces sewage contains a large amount of organic matter, pathogens and odor substances, efficient sewage treatment technologies are required for treatment.

[0003] However, the existing feces sewage treatment methods have problems such as low treatment efficiency, high energy consumption, large pollutant emissions, and large volume, which are likely to cause secondary pollution to the surrounding environment and have many other impacts. Moreover, the feces sewage in the vacuum collection system has a higher concentration and is more difficult to treat. Summary of the Utility Model

[0004] In view of the above problems, the utility model provides a feces sewage treatment system, which can reduce the pollution of feces sewage to the environment, improve the recycling rate of water resources, and is suitable for the treatment of feces sewage with a relatively high concentration and treatment difficulty through the mutual cooperation of an aeration unit, an evaporation unit, a drying unit, a water collection unit and a heat pump unit.

[0005] The utility model provides a feces sewage treatment system, comprising: an aeration unit configured to perform aeration treatment on feces sewage; an evaporation unit disposed downstream of the aeration unit and communicating with the aeration unit, the evaporation unit being configured to perform evaporation treatment on the feces sewage treated by the aeration unit; a drying unit communicating with the evaporation unit, the drying unit being configured to perform drying treatment on the material treated by the evaporation unit; a water collection unit communicating with the evaporation unit and the drying unit respectively, the water collection unit being configured to collect the water evaporated from the evaporation unit and the drying unit; a heat pump unit communicating with the water collection unit, the heat pump unit being configured to provide a heat exchange medium to the water collection unit to cool and liquefy the steam entering the water collection unit.

[0006] In some embodiments, the water collection unit comprises: a steam condensation module, including: a steam condensation tank and a first cooling coil, the steam condensation tank communicating with the evaporation unit and the drying unit respectively, the first cooling coil being disposed in the steam condensation tank and communicating with the heat pump unit, the heat pump unit being configured to provide a heat exchange medium to the first cooling coil; a water storage module communicating with the steam condensation tank, the water storage module being configured to store the condensed water in the steam condensation tank.

[0007] In some embodiments, the water storage module includes: a water storage container, which is communicated with the steam condensation tank, and the water storage container is configured to store the condensed water in the steam condensation tank.

[0008] In some embodiments, the water storage module further includes: a centrifugal pump and a water ejector. The water storage container, the centrifugal pump, and the water ejector are sequentially communicated through pipelines to form a circulation loop. The centrifugal pump drives the water in the water storage container to circulate in the circulation loop. The steam condensation tank is communicated with the water ejector, and when the water ejector operates, it pumps the condensed water in the steam condensation tank into the circulation loop.

[0009] In some embodiments, the water storage module further includes: a second cooling coil, which is arranged in the water storage container, and the second cooling coil is connected to the heat pump unit in a circulating manner. The heat pump unit is configured to provide a heat exchange medium to the second cooling coil.

[0010] In some embodiments, the water storage module further includes: a first liquid level sensor, which is arranged in the water storage container to detect the liquid level in the water storage container. The water storage container is configured to drain water when the detection result of the first liquid level sensor is greater than a preset liquid level value.

[0011] In some embodiments, the aeration unit includes: an aeration container for storing fecal sewage; an aeration pipeline, one end of which is communicated with an external air supply device, and the other end extends below the liquid level of the fecal sewage in the aeration container to aerate a gas medium into the fecal sewage. The gas medium includes ozone.

[0012] In some embodiments, the evaporation unit includes: an evaporation kettle, which is communicated with the aeration container through a pipeline. The evaporation kettle is further provided with a first discharge port and a first steam outlet. The first discharge port is used to discharge the evaporated material, and the first steam outlet is communicated with the steam condensation tank; an evaporation assembly, which is arranged in the evaporation kettle to evaporate the fecal sewage.

[0013] In some embodiments, the evaporation assembly includes a first evaporation coil, which is communicated with the heat pump unit. The heat pump unit is further configured to provide a heat exchange medium to the first evaporation coil.

[0014] In some embodiments, the drying unit includes: a drying box, which is connected to the first discharge port through a pipeline. The drying box has a second discharge port and a second steam outlet. The second discharge port is used to discharge the dried material, and the second steam outlet is connected to the steam condensation tank; a heating element, which is arranged in the drying box and is used to heat the material to evaporate the moisture in the material.

[0015] The fecal sewage treatment system of the present utility model includes an aeration unit, an evaporation unit, a drying unit, a moisture collection unit and a heat pump unit. The aeration unit is used to aerate the fecal sewage to reduce the concentration of bacteria, microorganisms and odors in the fecal sewage, reduce large particle solids, and increase the fluidity of the fecal sewage; through the evaporation unit, most of the moisture in the fecal sewage is removed to form a concentrated solution of fecal sewage; through the drying unit, the moisture in the concentrated solution can be further evaporated to obtain a dried fluid material, and the fluid material can be recycled. Through the moisture collection unit, most of the moisture separated from the evaporation unit and the drying unit can be re-collected and utilized, which is beneficial to reducing water resource waste and reducing the treatment cost; through the heat pump unit, cold energy can be provided for condensing steam in the moisture collection unit. Thus, the fecal sewage treatment system of this embodiment can improve the treatment effect of fecal sewage, reduce the environmental pollution of fecal sewage through the mutual cooperation of the aeration unit, the evaporation unit, the drying unit, the moisture collection unit and the heat pump unit, and is applicable to the treatment of fecal sewage with higher concentration and treatment difficulty, expanding the scope of use, improving the water resource recycling rate, and having higher practicability. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the fecal sewage treatment system of the embodiment of the present utility model;

[0018] Figure 2 It is a schematic diagram of the heat pump unit of the embodiment of the present utility model;

[0019] Figure 3 It is a structural schematic diagram of the evaporation unit of the embodiment of the present utility model;

[0020] Figure 4 It is a structural schematic diagram of the drying unit of the embodiment of the present utility model;

[0021] Figure 5 This is the process flow diagram of the fecal sewage treatment process according to the embodiment of the present utility model.

[0022] Description of the reference numerals in the drawings:

[0023] 100 - Fecal sewage treatment system;

[0024] 1 - Aeration unit;

[0025] 101 - Aeration container; 102 - Aeration pipeline;

[0026] 2 - Evaporation unit;

[0027] 201 - Evaporation kettle; 202 - First evaporation coil; 203 - Air extraction port; 204 - First feed port; 205 - First discharge port; 207 - Observation window; 208 - First air breaking port; 209 - Defoaming medium inlet; 210 - First vacuum valve; 211 - Air ejector; 212 - Liquid level sensor; 213 - Foam sensor;

[0028] 3 - Drying unit;

[0029] 301 - Drying box; 302 - Heating element; 303 - Heat conduction cavity; 304 - Stirring drive; 305 - Transmission shaft; 306 - Stirring member; 307 - Second air breaking port; 308 - Electric diaphragm pump; 309 - Second pressure relief port; 310 - Second discharge port;

[0030] 4 - Moisture collection unit;

[0031] 41 - Steam condensation tank; 42 - First cooling coil; 43 - Water storage container; 431 - Water injection port; 432 - Drainage port; 433 - Water outlet; 44 - Centrifugal pump; 45 - Water ejector; 46 - Second cooling coil;

[0032] 5 - Heat pump unit;

[0033] 51 - Compressor; 52 - First heat exchange coil; 53 - First refrigerant liquid storage tank; 54 - Second heat exchange coil; 55 - Third heat exchange coil;

[0034] 6 - Control valve assembly;

[0035] 601 - First main feed valve; 602 - First micro feed valve; 603 - Micro feed manual valve; 604 - Defoaming valve; 605 - First air breaking valve; 606 - First manual air breaking valve; 607 - First discharge valve; 608 - Second vacuum valve; 609 - Water injection valve; 610 - Drainage valve; 611 - Second feed valve; 612 - Second pressure relief valve; 613 - Second discharge valve; 614 - Second air breaking valve. Detailed implementation manners

[0036] In order to make the above-mentioned objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0037] With the development of urbanization and industrialization, vacuum collection and sewage systems are widely used in mobile shelter toilets, public toilets, trains, airplanes and other places, generating a large amount of fecal sewage. Since fecal sewage contains a large amount of organic matter, pathogens and odor substances, efficient sewage treatment technologies are required to treat it. However, the existing fecal sewage treatment methods have problems such as low treatment efficiency, high energy consumption, large pollutant emissions, and large volume, which are likely to cause secondary pollution to the surrounding environment and many other impacts. Moreover, the fecal sewage in the vacuum collection and sewage system has a higher concentration and greater treatment difficulty.

[0038] In view of this, the present utility model provides a fecal sewage treatment system and a fecal sewage treatment process. Through the mutual cooperation of the aeration unit, evaporation unit, and drying unit, the treatment effect of fecal sewage can be improved, the pollution of fecal sewage to the environment can be reduced, and it is applicable to the treatment of fecal sewage with a relatively high concentration and treatment difficulty, expanding the scope of use and having higher practicability.

[0039] The following combines Figures 1 - 5 Describe the fecal sewage treatment system 100 according to the first aspect embodiment of the present utility model.

[0040] The fecal sewage treatment system 100 of this embodiment can be installed in places such as mobile shelter toilets, public toilets, trains, airplanes, etc. The fecal sewage treatment system 100 is used to treat fecal sewage.

[0041] The fecal sewage treatment system 100 may include: a feces collection unit. Among them, the feces collection unit can be an atmospheric pressure feces collection unit or a vacuum feces collection unit. The feces collector can discharge fecal sewage into the sewage container. For example, the sewage container can be the aeration container 101 of the aeration unit 1. It can be understood that for places with a water supply and drainage system connected, such as public toilets, the feces collection unit can be an atmospheric pressure feces collection unit, and the feces collector can discharge fecal sewage into the sewage container by flushing; for scenarios with limited flushing water in mobile shelter toilets, trains, airplanes, etc., the feces collection unit is preferably a vacuum feces collection unit. At this time, the feces collector can discharge fecal sewage into the sewage container through a relatively high negative pressure combined with a small amount of flushing water, reducing the water consumption of flushing. Correspondingly, the concentration of the generated fecal sewage is relatively high.

[0042] Combined with Figure 1, the fecal sewage treatment system 100 may include an aeration unit 1. The aeration unit 1 may be configured to aerate the fecal sewage. For example, the aeration unit 1 may introduce gases such as oxygen and ozone into the fecal sewage to increase the oxygen content in the fecal sewage, promote the degradation of organic matter by microorganisms, so as to reduce the concentration of bacteria and odor in the fecal sewage, and reduce large particulate solids, increasing the fluidity of the fecal sewage, which is convenient for subsequent discharge into the evaporation unit 2 and the drying unit 3 for treatment.

[0043] Combined with Figure 1 , the fecal sewage treatment system 100 may further include an evaporation unit 2. The evaporation unit 2 may be disposed on the downstream side of the aeration unit 1 and communicate with the aeration unit 1. The evaporation unit 2 is configured to evaporate the fecal sewage treated by the aeration unit 1. For example, after the aeration unit 1 finishes aerating the fecal sewage, the aerated fecal sewage may be discharged into the evaporation unit 2 for evaporation treatment. Through the evaporation treatment, most of the water in the fecal sewage can be removed. For example, 75%-90% of the water can be removed. And because it is evaporation treatment, the water in the fecal sewage can be discharged in the form of steam. In this way, it is convenient for the water collection unit 4 to collect and condense the steam, which is conducive to realizing the recycling of water, reducing water resource waste and reducing the treatment cost.

[0044] Considering that the evaporation unit 2 cannot completely remove the water, therefore, the fecal sewage treatment system 100 of this embodiment may further include a drying unit 3. The drying unit 3 may communicate with the evaporation unit 2. The drying unit 3 is configured to dry the material treated by the evaporation unit 2. For example, when the evaporation unit 2 removes most of the water in the aerated fecal sewage to form a fecal sewage concentrate, then the concentrate may be discharged into the drying unit 3, and the drying unit 3 dries it at a certain temperature to further evaporate the water in the concentrate, obtaining a dried fluid material, and then the fluid material may be discharged into a waste residue storage box for resource utilization, such as being used as fertilizer, biofuel, etc.

[0045] It can be understood that in the case of setting the drying unit 3, the requirement for the amount of water removed by the evaporation unit 2 can be reduced, so that the concentrate after evaporation treatment by the evaporation unit 2 can be discharged into the drying unit 3 for further drying treatment; in other cases, the fecal sewage treatment system 100 may not be provided with the drying unit 3, and only use the evaporation unit 2 to remove most of the water and then utilize the fecal material for resource utilization, such as being used as fertilizer. And in the case of not setting the drying unit 3, the water removal rate in the evaporation unit 2 can be increased.

[0046] Since most of the water in the fecal sewage is removed in the form of steam in the evaporation unit 2, to avoid water waste and improve the utilization rate of water resources. The fecal sewage treatment system 100 in this embodiment may further include a water collection unit 4. The water collection unit 4 is connected to the evaporation unit 2, and the water collection unit 4 is configured to collect the water evaporated by the evaporation unit 2. In this way, most of the water can be collected and reused, which is beneficial to reducing water waste and lowering the treatment cost.

[0047] Optionally, since the drying unit 3 can also remove part of the water in the concentrated liquid in the form of steam, the drying unit 3 can also be connected to the water collection unit 4 to collect the steam discharged from the drying unit 3, further realizing the collection and reuse of water. Moreover, the drying unit 3 and the evaporation unit 2 share the water collection unit 4, which is beneficial to simplifying the system structure, saving the system occupied space, and making it easier to arrange the system in places with limited installation space, such as airplanes, toilet mobile shelters, trains, etc.

[0048] The fecal sewage treatment system 100 of the embodiment of the present utility model includes an aeration unit 1, an evaporation unit 2, a drying unit 3 and a water collection unit 4. The fecal sewage is aerated by the aeration unit 1 to reduce the concentration of bacteria, microorganisms and odors in the fecal sewage, reduce large particle solids, and increase the fluidity of the fecal sewage, facilitating subsequent discharge into the evaporation unit 2 and the drying unit 3 for treatment; through the evaporation unit 2, most of the water in the fecal sewage can be removed to form a concentrated fecal sewage liquid; through the drying unit 3, the water in the concentrated liquid can be further evaporated to obtain a dried fluid material, and the fluid material can be recycled. Through the water collection unit 4, most of the water separated from the fecal sewage can be collected and reused, which is beneficial to reducing water waste and lowering the treatment cost. Thus, the fecal sewage treatment system 100 of this embodiment can improve the treatment effect of fecal sewage, reduce the environmental pollution of fecal sewage through the mutual cooperation of the aeration unit 1, the evaporation unit 2 and the drying unit 3, and is applicable to the treatment of fecal sewage with higher concentration and treatment difficulty, expanding the scope of use and having higher practicability.

[0049] Combined with Figure 1, in some embodiments, the aeration unit 1 may include: an aeration container 101 and an aeration pipeline 102. Among them, the aeration container 101 may be a tank, a box, or other structures made of metal parts. The aeration container 101 can be used to store fecal sewage and provide an aeration environment. The aeration container 101 can be connected to the feces collection unit through a pipeline so that the feces collection unit can discharge fecal sewage into the aeration container 101. One end of the aeration pipeline 102 is connected to an external air supply device, and the other end extends below the liquid level of the fecal sewage in the aeration container 101 to aerate a gas medium into the fecal sewage. In this way, the structure of the aeration unit 1 is relatively simple. By aerating the fecal sewage through the aeration pipeline 102, the oxygen content in the fecal sewage is increased, thereby eliminating the odor of the fecal sewage, sterilizing, promoting the decomposition of organic matter, reducing large particulate solids, increasing the fluidity of the fecal sewage, and facilitating the subsequent discharge into the evaporation unit 2.

[0050] Further, the gas medium includes ozone. In this way, the gas medium can dissolve in the sewage at a relatively high rate, increasing the oxygen content in the fecal sewage, which is beneficial to promoting the decomposition of organic matter. Moreover, since ozone has extremely strong oxidizing and sterilizing properties, it helps to kill bacteria and other microorganisms in the fecal sewage, reduce the odor of the fecal sewage, and fade the color.

[0051] Combined with Figure 1 and Figure 3 , in some embodiments, the evaporation unit 2 may include an evaporation kettle 201 and an evaporation component. Among them, the evaporation kettle 201 is a container that can withstand a certain temperature, pressure, and can provide a closed inner cavity. The evaporation kettle 201 is provided with a first feed port 204, a first discharge port 205, and a first steam outlet. Among them, the first feed port 204 may be provided at the upper part of the side wall of the evaporation kettle 201 to ensure that the evaporation kettle 201 can handle a sufficient amount of fecal sewage; the first discharge port 205 may be provided at the bottom of the evaporation kettle 201 to facilitate full discharge after evaporation and reduce residues; the first steam outlet may be provided at the top of the side wall or the top wall of the evaporation kettle 201 to facilitate the automatic rise of steam and discharge from the first steam outlet.

[0052] Combined with Figure 1 and Figure 3, the first feed port 204 of the evaporation kettle 201 can be connected to the aeration unit 1 through a pipeline. For example, the first feed port 204 is connected to the aeration container 101 through a pipeline. The first discharge port 205 is used to discharge the evaporated material. For example, the first discharge port 205 can be connected to the drying unit 3, and the evaporated material can be discharged to the drying unit 3 through the first discharge port 205. The first steam outlet is connected to the moisture collection unit 4 to discharge the evaporated steam into the moisture collection unit 4. The evaporation assembly can provide evaporation heat for the fecal sewage. The evaporation assembly is arranged in the evaporation kettle 201, and the heat of the evaporation assembly acts on the fecal sewage, causing the moisture in the fecal sewage to evaporate and be discharged from the first steam outlet. Thus, the evaporation kettle 201 of the evaporation unit 2 in this embodiment can provide an evaporation environment, and the evaporation assembly can provide evaporation heat. The overall structure is relatively simple and easy to implement.

[0053] Among them, the evaporation assembly can be a self-heating element. For example, the evaporation assembly can be an electric heating element; or, the evaporation assembly can form a heat exchange system with an external device. For example, the evaporation assembly serves as the hot end.

[0054] Optionally, a first temperature sensor can also be arranged in the evaporation kettle 201. The first temperature sensor is used to detect the temperature inside the evaporation kettle 201, and the control device can be connected to the first temperature sensor to control the operating state of the evaporation assembly according to the first temperature sensor.

[0055] In some embodiments, the evaporation unit 2 can also include a negative pressure assembly configured to draw a negative pressure on the evaporation kettle 201. Thus, when the evaporation unit 2 is working, a certain negative pressure is maintained inside the evaporation kettle 201, which can reduce the boiling point of the sewage, increase the evaporation rate, and thus improve the treatment speed of the evaporation unit 2 for fecal sewage; moreover, it is beneficial to the efficient circulation of the flushing water, so that the fecal sewage treatment system 100 is more suitable for scenarios with a relatively high concentration of fecal sewage, such as trains, airplanes, mobile shelter toilets, etc. And by adjusting the negative pressure value inside the evaporation kettle 201 through the negative pressure assembly, the evaporation rate of the fecal sewage can be conveniently regulated.

[0056] Of course, as an alternative embodiment, the evaporation unit 2 can also not be provided with a negative pressure assembly. At this time, the evaporation kettle 201 is a positive pressure evaporation.

[0057] Combined Figure 1 and Figure 3, in some embodiments, the evaporation kettle 201 may further be provided with an air extraction port 203, and the negative pressure assembly may extract the air in the evaporation kettle 201 through the air extraction port 203 to keep the evaporation kettle 201 in a negative pressure environment. The negative pressure assembly may include a first vacuum valve 210 and an air ejector 211. Among them, the first vacuum valve 210 is disposed at the air extraction port 203 in an openable and closable manner to open or close the air extraction port 203. The air ejector 211 may be connected to the water collection unit 4 through a pipeline, and the air ejector 211 is configured to extract air from the evaporation kettle 201 through the air extraction port 203 during operation. For example, when the evaporation kettle 201 needs to be converted to a negative pressure state, the first vacuum valve 210 can be opened, and then the water collection unit 4 sprays the stored water from the air ejector 211. When the water flow passes through the air ejector 211, it is ejected at a high speed. The high-speed fluid causes a pressure drop in the air ejector 211, so that the gas in the evaporation kettle 201 enters the air ejector 211 through the air extraction port 203 and the first vacuum valve 210, and the inner cavity of the evaporation kettle 201 can be converted to a negative pressure environment. In this way, the negative pressure assembly of this embodiment makes full use of the water in the fecal sewage collected by the water collection unit 4 to form a high-speed jet to suck the air in the inner cavity of the evaporation kettle 201, increases the function of the water collection unit 4, eliminates the need to separately set up a water supply device, and has a higher integration level.

[0058] Combined with Figure 1 and Figure 3 , optionally, a first pressure sensor may be provided in the evaporation kettle 201. The first pressure sensor is used to detect the pressure in the inner cavity of the evaporation kettle 201, and the control device may be connected to the first pressure sensor to control the operating state of the negative pressure assembly according to the first pressure sensor.

[0059] Combined with Figure 1 , in some embodiments, the fecal sewage treatment system 100 further includes: a control valve assembly 6. The control valve assembly 6 includes: a first main feed valve 601 and a first micro feed valve 602. The first main feed valve 601 and the first micro feed valve 602 are arranged in parallel on the pipeline between the evaporation kettle 201 and the aeration unit 1. The first main feed valve 601 controls the on-off of the feed to the evaporation unit 2, and the first micro feed valve 602 is configured to replenish materials into the evaporation kettle 201 during the operation of the evaporation unit 2.

[0060] For example, each time the evaporation kettle 201 operates, since the evaporation kettle 201 has drained the fecal sewage after the evaporation treatment in the previous evaporation step, at the start of the current evaporation step, the first main feed valve 601 can be opened, and the aeration container 101 discharges a set feed volume of aerated fecal sewage into the evaporation kettle 201 through the pipeline where the first main feed valve 601 is located, and then the first main feed valve 601 is closed; during the evaporation process, as the water in the fecal sewage gradually decreases and the liquid level in the evaporation kettle 201 gradually drops, it is necessary to supplement fecal sewage into the evaporation kettle 201. At this time, the first main feed valve 601 can be kept closed, and the first micro-feed valve 602 is opened. The aeration container 101 supplements fecal sewage into the evaporation kettle 201 multiple times and in batches through the branch where the first micro-feed valve 602 is located, so that after the concentrated liquid in the evaporation kettle 201 after evaporation reaches the set discharge volume, it is uniformly discharged into the drying unit 3 for further treatment.

[0061] In this way, the number of times the evaporation kettle 201 opens the first discharge port 205 to discharge materials into the drying unit 3 can be reduced, and the processing efficiency and sewage treatment volume of a single evaporation step can be improved.

[0062] Combined with Figure 1 , in some possible embodiments, the first micro-feed valve 602 can be connected to the water collection unit 4 through a pipeline. In this way, after the evaporation kettle 201 performs several evaporation steps, the water collection unit 4 can discharge clean water into the evaporation kettle 201 through the first micro-feed valve 602, which can not only clean the inside of the evaporation kettle 201, but also make full use of the recycled water and reduce the operating cost of the system 100.

[0063] Optionally, a micro-feed manual valve 603 can also be serially arranged on the branch where the first micro-feed valve 602 is located. The micro-feed manual valve 603 can be manually opened or closed by an operator. The micro-feed manual valve 603 can be in a normally open state and is only manually closed or opened by the operator when the fecal sewage treatment system 100 needs to be overhauled or in other situations where truncation is required.

[0064] In some embodiments, the evaporation unit 2 further includes: a liquid level sensor 212. The liquid level sensor 212 can be arranged in the inner cavity of the evaporation kettle 201. The liquid level sensor 212 is used to detect the liquid level in the evaporation kettle 201, so as to control the operating states of positions such as the first main feed valve 601, the first micro-feed valve 602, and the first discharge port 205 according to the detection results of the liquid level sensor 212.

[0065] Combined with Figure 1, in some embodiments, the evaporation unit 2 may further include a foam detection component, which can be used to detect the amount of bubbles in the evaporation kettle 201. The fecal sewage evaporates in the evaporation kettle 201 under a negative pressure environment and a certain temperature. As the water content decreases, more bubbles will be generated. When the amount of bubbles is too large, it will affect the discharge of steam and the evaporation effect. Therefore, in this embodiment, a foam detection component is also provided to detect the amount of bubbles in the evaporation kettle 201 through the foam detection component, so that the operator can perform corresponding processing operations according to the detection results and defoam in time.

[0066] Combined with Figure 1 and Figure 3 , in some embodiments, the foam detection component may include an observation window 207. The observation window 207 is provided on the side wall of the evaporation kettle 201. The operator can observe the amount of bubbles in the evaporation kettle 201 through the observation window 207 to judge the evaporation condition and take corresponding measures. Optionally, the height of the observation window 207 on the side wall of the evaporation kettle 201 can correspond to the set bubble liquid level. When a large amount of bubbles can be observed through the observation window 207, measures can be taken to defoam. Optionally, the height of the observation window 207 can be 1 / 2 - 4 / 5 of the height of the evaporation kettle 201. For example, the height of the observation window 207 can be 1 / 2, 2 / 3, 3 / 4 or 4 / 5 of the height of the evaporation kettle 201. Of course, the present invention does not limit this, and the height of the observation window 207 can be reasonably set according to actual needs.

[0067] Combined with Figure 1 and Figure 3 , in some other embodiments, the foam detection component may further include a foam sensor 213. Specifically, the foam sensor 213 is provided in the inner cavity of the evaporation kettle 201. The foam sensor 213 is used to detect the amount of bubbles in the evaporation kettle 201. For example, the foam sensor 213 can detect the height of the bubbles, thereby judging the amount of bubbles and feeding back the detection result to the control device, so as to facilitate taking treatment measures and improving the automation degree of detection.

[0068] In some embodiments, the fecal sewage treatment system 100 further includes: a control device, which is communicatively connected to the foam detection component and the first micro-feed valve 602 respectively, to adjust the operating conditions of the first micro-feed valve 602 according to the detection results of the foam detection component. The operating conditions include: the opening and closing state of the first micro-feed valve 602, the opening degree of the first micro-feed valve 602, and the opening duration. For example, during the evaporation process, as the water in the fecal sewage decreases continuously, the fecal sewage gradually becomes thicker and the bubbles gradually increase. When the foam sensor 213 detects that the bubbles exceed the upper limit of the bubble liquid level, the detection result is fed back to the control device, and the control device opens the first micro-feed valve 602 for feeding. The supplemented fecal sewage can dilute the concentration of the fecal sewage in the evaporation kettle 201 to a certain extent, thereby reducing the amount of bubbles. In this way, the degree of automation of the defoaming operation of the evaporation unit 2 can be improved.

[0069] Combined with Figure 1 and Figure 3 , optionally, the evaporation kettle 201 may further be provided with a defoaming medium inlet 209, which is provided on the side wall of the evaporation kettle 201 and is used for introducing defoaming liquid. The control valve assembly 6 may further include: a defoaming valve 604. The defoaming valve 604 is provided at the defoaming medium inlet 209 to control the on-off of the defoaming medium inlet 209. In this way, when the foam sensor 213 detects that the bubbles exceed the upper limit of the bubble liquid level, the detection result is fed back to the control device, and the control device can open the defoaming valve 604, or the defoaming valve 604 can be manually opened to introduce defoaming liquid into the evaporation kettle 201 to achieve defoaming.

[0070] Combined with Figure 1 and Figure 3 , in some embodiments, when a negative pressure component is provided in the evaporation kettle 201 for negative pressure evaporation, the evaporation kettle 201 is further provided with a first air-breaking port 208. The control valve assembly 6 includes a first air-breaking valve 605, and the first air-breaking valve 605 is provided at the first air-breaking port 208 to open or close the first air-breaking port 208. In this way, after the evaporation in the evaporation kettle 201 is completed, the first air-breaking port 208 can be opened through the first air-breaking valve 605 to make the inner cavity of the evaporation kettle 201 return to the atmospheric pressure state, so as to facilitate discharging. Preferably, after the evaporation of the fecal sewage by the evaporation unit 2 is completed, the first air-breaking valve 605 can be opened first, and then the first discharge port 205 can be opened for discharging, and the concentrated liquid is discharged into the drying unit 3 or the outside.

[0071] Optionally, the evaporation kettle 201 is further provided with a first manual air-breaking port, and the control valve assembly 6 further includes a first manual air-breaking valve 606, which is provided at the first manual air-breaking port and is normally closed. When the first air-breaking valve 605 malfunctions, the first manual air-breaking valve 606 can be manually operated to make the evaporation kettle 201 return to the atmospheric pressure state, so as to facilitate discharging.

[0072] Combined with Figure 1 and Figure 2 In some embodiments, the fecal sewage treatment system 100 may further include a heat pump unit 5. The heat pump unit 5 is disposed outside the evaporation kettle 201. The heat pump unit 5 may be connected to the evaporation unit 2, and the heat pump unit 5 is configured to provide an evaporation heat exchange medium to the evaporation unit 2. Since the evaporation unit 2 mainly performs low-temperature evaporation in a negative pressure environment, the evaporation assembly may include a first evaporation coil 202. The first evaporation coil 202 is disposed in the inner cavity of the evaporation kettle 201. The heat pump unit 5 may include a compressor 51, a first heat exchange coil 52, a first refrigerant liquid storage tank 53, etc. The compressor 51, the first heat exchange coil 52, the first refrigerant liquid storage tank 53, and the first evaporation coil 202 form a first circulation loop. Among them, the first heat exchange coil 52 may be used as the hot end, and the first evaporation coil 202 as the cold end (to ensure a lower temperature and achieve low-temperature evaporation). By circulating the refrigerant between the first evaporation coil 202 and the heat pump unit 5, the first evaporation coil 202 can provide a certain temperature to evaporate the fecal sewage.

[0073] Optionally, the temperature of the first evaporation coil 202 may be 35°C - 45°C. That is, the evaporation unit 2 of this embodiment can perform negative pressure low-temperature evaporation on the fecal sewage, with high evaporation efficiency and can reduce the energy consumption of the fecal sewage treatment system 100 itself. In this way, the heat pump unit 5 can be used to provide the heat required for evaporation for the evaporation assembly, and the structure is relatively simple and easy to implement.

[0074] In some embodiments, the control valve assembly 6 may further include a first discharge valve 607. The first discharge valve 607 may be disposed at the first discharge port 205 to control the closed or open state of the first discharge port 205. For example, after evaporation is completed, the first discharge valve 607 can be opened for discharging. In this way, the opening and closing of the first discharge port 205 can be conveniently controlled.

[0075] Combined with Figure 1 In some embodiments, the moisture collection unit 4 may include: a steam condensation module and a water storage module. Among them, the steam condensation module may include: a steam condensation tank 41 and a first cooling coil 42. Among them, the steam condensation tank 41 may be connected to the evaporation unit 2. For example, the steam condensation tank 41 has a first steam inlet, and the first steam inlet is connected to the first steam outlet of the evaporation kettle 201 through a pipeline. The steam in the evaporation kettle 201 can enter the steam condensation tank 41 through the first steam outlet and the first steam outlet.

[0076] The first cooling coil 42 is arranged inside the steam condensation tank 41, and a condensation heat exchange medium flows through the first cooling coil 42. The first cooling coil 42 is configured to cool the steam entering the steam condensation tank 41 into condensed water. For example, the heat pump unit 5 may further be provided with a second heat exchange coil 54. The first cooling coil 42 may form a second circulation loop with the compressor 51 and the second heat exchange coil 54 of the heat pump unit 5. Among them, the first cooling coil 42 may serve as the cold end, and the second heat exchange coil 54 may serve as the hot end. When the refrigerant circulates in the second circulation loop, it refrigerates at the first cooling coil 42, causing the steam entering the steam condensation tank 41 to be cooled and liquefied to form condensed water.

[0077] The water storage module may include a water storage container 43. For example, the water storage container 43 may be a water storage tank. The water storage container 43 may be communicated with the steam condensation tank 41, and the steam condensation tank 41 discharges the condensed water into the water storage container 43 for storage.

[0078] In this way, the steam condensation module is used to realize the condensation and liquefaction of steam, and the water storage module is used to realize the storage of condensed water, making the working principle of the water collection unit 4 simple and reliable and easy to implement.

[0079] Combined Figure 1 , in some embodiments, the water storage module may further include a centrifugal pump 44 and a water ejector 45. Among them, the centrifugal pump 44 may be a horizontal multi-stage centrifugal pump 44. The water storage container 43, the centrifugal pump 44 and the water ejector 45 are sequentially communicated through pipelines and form a circulation loop for water collection. Specifically, the centrifugal pump 44 drives the water in the water storage container 43 to flow in the circulation loop, and the water ejector 45 is also communicated with the steam condensation tank 41. When the water ejector 45 operates, it pumps the condensed water in the steam condensation tank 41 into the circulation loop. In this way, when it is necessary to store the condensed water in the steam condensation tank 41 into the water storage container 43, the centrifugal pump 44 can be controlled to drive the water in the water storage container 43 to flow in the circulation loop. When the water flows through the water ejector 45, a high-speed jet is formed. The high-speed fluid causes a pressure drop in the circulation loop (lower than the pressure in the steam condensation tank 41), so that the condensed water in the steam condensation tank 41 enters the circulation loop from the water ejector 45 and finally enters the water storage container 43. In this way, the water storage module of this embodiment makes full use of the water in the fecal sewage collected by the water collection unit 4 to form a high-speed jet to suck the condensed water in the steam condensation tank 41, increasing the function of the water collection unit 4, eliminating the need for a separate condensed water suction device, having a higher integration degree and a relatively simple structure.

[0080] Optionally, the steam condensate tank 41 has a condensate water outlet, and the condensate water outlet and the water ejector 45 are connected through a pipeline. The control valve assembly 6 further includes a second vacuum valve 608, and the second vacuum valve 608 is provided on the pipeline between the condensate water outlet and the water ejector 45. When it is necessary to store the condensate water in the steam condensate tank 41 into the water storage container 43, the second vacuum valve 608 can be opened first, and then the control centrifugal pump 44 can be started. In this way, a certain amount of condensate water can be stored in the steam condensate tank 41 before opening the second vacuum valve 608 and starting the centrifugal pump 44 to drain the condensate water into the water storage container 43, avoiding the centrifugal pump 44 from being in a constant running state and reducing the energy consumption of the centrifugal pump 44.

[0081] Combined Figure 1 , in some embodiments, the water storage module may further include a second cooling coil 46, and the second cooling coil 46 is provided in the water storage container 43, and the second cooling coil 46 is connected to the heat pump unit 5 in a circulating manner, and the heat pump unit 5 is configured to provide a heat exchange medium to the second cooling coil 46.

[0082] For example, the heat pump unit 5 may further be provided with a third heat exchange coil 55. The second cooling coil 46 and the compressor 51 of the heat pump unit 5, the third heat exchange coil 55, etc. may form a third circulation loop. Among them, the second cooling coil 46 may be used as the hot end, and the third heat exchange coil 55 may be used as the cold end. When the refrigerant circulates in the third circulation loop, heat is released at the second cooling coil 46, so that the heat can be absorbed by the condensate water in the water storage container 43, which is beneficial to transferring the heat in the heat pump unit 5 away, thereby ensuring the reliable operation of the heat pump unit 5.

[0083] Combined Figure 1 , in some embodiments, the water storage container 43 is provided with a water injection port 431 and a drain port 432. The control valve assembly 6 may include: a water injection valve 609 and a drain valve 610. The water injection valve 609 is provided with the water injection port 431 and is in a normally closed state. The water injection valve 609 can be opened before initially draining the condensate water in the steam condensate tank 41 into the water storage container 43 to inject a certain amount of water into the water storage container 43 to facilitate the normal operation of the water ejector 45 and the centrifugal pump 44. The drain valve 610 is provided at the drain port 432. When the water volume in the water storage container 43 reaches the allowable water level value, the air ejector 211 works due to the need to draw a negative pressure in the evaporation kettle 201, or when it is necessary to flush the evaporation kettle 201 through the first micro-feed valve 602 or any other situation where the water storage container 43 needs to drain water, the drain valve 610 can be opened to drain water. In this way, it is beneficial to the efficient operation of the system 100.

[0084] Optionally, the water storage container 43 is further provided with a water outlet 433, and the water outlet 433 can be communicated with at least the toilet of the feces collection unit. Moreover, the water in the water storage container 43 can flow unidirectionally to the feces collection unit. In this way, by connecting the water collection unit 4 with the feces collection unit, the water in the water storage container 43 can be used for flushing feces, realizing the efficient recycling of water resources. Of course, the water outlet 433 can also be communicated with other water-using devices.

[0085] In some embodiments, the water storage module may further include a first liquid level sensor disposed in the water storage container 43 to detect the liquid level in the water storage container 43, and the water storage container 43 is configured to drain water when the detection result of the first liquid level sensor is greater than a preset liquid level value. In this way, the excessive amount of water in the water storage container 43 can be prevented, ensuring the normal use of the water storage container 43 and the normal operation of the feces and sewage treatment system 100.

[0086] Combined with Figure 1 and Figure 4 In some embodiments, the drying unit 3 may include: a drying box 301 and a heating element 302. Specifically, the drying box 301 can be a structural member capable of withstanding a certain high temperature. The drying box 301 is provided with a second feed inlet, a second discharge port 310, and a second steam outlet. Among them, the second feed inlet can be communicated with the first discharge port 205 of the evaporation kettle 201 through a pipeline, so that the evaporation kettle 201 can discharge the concentrated feces liquid after evaporation treatment into the drying unit 3 for further treatment. Optionally, a driving pump may be provided on the pipeline between the second feed inlet of the drying box 301 and the first discharge port 205 of the evaporation kettle 201. The driving pump can be an electric diaphragm pump 308 or other types of driving pumps. By driving the driving pump, the concentrated liquid in the evaporation kettle 201 is discharged into the drying box 301. In this way, sufficient pump thrust can be provided for the circulation of the concentrated liquid between the evaporation kettle 201 and the drying box 301.

[0087] The second discharge port 310 is used to discharge the dried material, and the second steam outlet can be communicated with the water collection unit 4. For example, the steam condensation tank 41 has a second steam inlet, and the second steam outlet of the drying box 301 and the second steam inlet of the steam condensation tank 41 can be communicated through a pipeline, so as to discharge the steam generated in the drying box 301 into the steam condensation tank 41, thereby realizing the recycling of the steam in the drying box 301.

[0088] Combined with Figure 1 and Figure 4, a heating element 302 is disposed in the drying box 301. The heating element 302 is used to heat the material to evaporate the moisture in the material. It can be understood that since the drying unit 3 further removes moisture from the concentrated liquid processed by the evaporation unit 2, therefore, the operating temperature of the heating element 302 needs to be higher than the temperature of the evaporation component of the evaporation unit 2. However, the temperature provided by the heat pump unit 5 is limited. Therefore, the heating element 302 in this embodiment can be independent of the heat pump unit 5, that is, not connected to the heat pump unit 5. For example, the heating element 302 can be an electric heating element 302 or a heat-conducting oil heating element 302. In this way, the heating element 302 can provide sufficient heating temperature to remove the moisture in the concentrated liquid to the greatest extent and form a fluidized material. Optionally, the heating temperature of the heating element 302 can be 60°C - 120°C. In this way, the drying unit 3 in this embodiment can achieve medium-temperature drying of the concentrated liquid.

[0089] Optionally, the heating element 302 can include a heat-conducting cavity 303. Heat-conducting oil can flow in the heat-conducting cavity 303. A filling port can extend outside the drying box 301 for filling heat-conducting oil into the heat-conducting cavity 303. In this way, the temperature of the heat-conducting oil is relatively high, which can provide sufficient heat for the drying unit 3 to dry the concentrated liquid and ensure the processing effect.

[0090] Combined with Figure 1 and Figure 4 , since the operating temperature of the drying unit 3 is relatively high, therefore, the drying box 301 is provided with a second pressure relief port 309. The control valve assembly 6 includes a second pressure relief valve 612. The second pressure relief valve 612 is disposed at the second pressure relief port 309 to open or close the second pressure relief port 309. In this way, when the pressure in the drying box 301 reaches the set pressure value, the second pressure relief valve 612 can be opened for pressure relief.

[0091] Optionally, the control valve assembly 6 can further include a second feed valve 611. The second feed valve 611 can be disposed at the second feed port of the drying box 301 to open or close the second feed port, thereby controlling the feed amount of the drying box 301.

[0092] Optionally, the control valve assembly 6 can further include a second discharge valve 613. The second feed valve 611 can be disposed at the second discharge port 310 of the drying box 301 to open or close the second discharge port 310, thereby controlling the discharge of the drying box 301.

[0093] Combined with Figure 1 and Figure 4, optionally, the drying unit 3 may include a stirring assembly, and the stirring assembly may include a stirring driving member 304, a transmission shaft 305, and a stirring member 306. Among them, the stirring driving member 304 may be a driving motor, and the stirring member 306 includes a plurality of stirring scrapers arranged circumferentially along the transmission shaft 305. When the drying unit 3 is operating, the stirring driving member 304 drives the stirring member 306 to rotate through the transmission shaft 305 to stir the concentrated liquid in the drying tank 301, which is beneficial to improving the temperature uniformity of the concentrated liquid everywhere, and thus improving the drying efficiency.

[0094] Combined with Figure 1 and Figure 4 , optionally, the drying tank 301 is further provided with a second air-breaking port 307, and the control valve assembly 6 further includes a second air-breaking valve 614, and the second air-breaking valve 614 is arranged at the second air-breaking port 307. In this way, after the drying unit 3 stops operating, the inside of the drying tank 301 can be restored to normal pressure in time through the second air-breaking valve 614, so as to facilitate discharging or other operations.

[0095] Combined with Figure 1 and Figure 4 , optionally, the drying unit 3 may further include a second temperature sensor, and the second temperature sensor is used to measure the temperature inside the drying tank 301, so as to timely adjust the temperature of the heating member 302 to ensure that the temperature meets the requirements of the drying treatment.

[0096] The following describes the fecal sewage treatment process of the second aspect embodiment of the present invention.

[0097] Combined with Figure 1 and Figure 5 , the fecal sewage treatment process of this embodiment can be applied to the fecal sewage treatment system 100 in the above embodiment. Specifically, the fecal sewage treatment process may include the following steps:

[0098] S101, aerate the fecal sewage entering the aeration unit 1;

[0099] Specifically, the fecal sewage is discharged into the aeration container 101 of the aeration unit 1 by the fecal collection unit. When the fecal sewage in the aeration container 101 reaches the set aeration liquid level, start the air supply device to aerate the fecal sewage, and continue for the set aeration duration or until the fecal sewage reaches the highest liquid level, then stop aeration, and discharge the aerated fecal sewage into the evaporation kettle 201 of the evaporation unit 2 for temporary storage and wait for the next treatment.

[0100] Among them, the set aeration liquid level is preferably 20%-35% of the inner cavity height of the aeration container 101. For example, the set aeration liquid level can be 20%, 22%, 25%, 28%, 30%, 33% or 35% of the inner cavity height of the aeration container 101. Of course, it can also be outside the above range. The air supply device can be a 50g air-source ozone generator, and the 50g air-source ozone generator supplies ozone into the fecal sewage. The set aeration duration can be 2h-5h. For example, the set aeration duration can be 2h, 3h, 4h or 5h.

[0101] After the aeration treatment, the odor concentration of the fecal sewage is reduced by 95%, the color changes from dark brown to light yellow semi-transparent, and the large particle solids are significantly reduced, and the fluidity is increased.

[0102] S102, discharging the aerated fecal sewage into the evaporation unit 2. The evaporation unit 2 evaporates the fecal sewage at a first preset negative pressure value and a first preset temperature, and the water collection unit 4 collects the steam discharged from the evaporation unit 2.

[0103] Specifically, the first main feed valve 601 between the aeration unit 1 and the evaporation unit 2 can be opened, and the aerated fecal sewage with a set feed amount is discharged into the evaporation kettle 201 of the evaporation unit 2 at one time from the aeration container 101 through the pipeline where the first main feed valve 601 is located, and then the first main feed valve 601 is closed. Then the first circulation loop between the evaporation assembly and the heat pump unit 5 is started. The evaporation assembly is used as the cold end, and the temperature of the evaporation assembly is 35°C-45°C. And, the evaporation kettle 201 is pumped to a negative pressure state through the negative pressure assembly, and the pressure value is the first preset negative pressure value, so that the evaporation unit 2 performs low-temperature evaporation on the fecal sewage in a negative pressure environment to remove most of the water in the fecal sewage and form a fecal sewage concentrate (the concentration is 15-20 times that of the original fecal sewage concentration); and, during the evaporation process, the second circulation loop formed by the first cooling coil 42 in the steam condenser tube of the water collection unit 4 and the heat pump unit 5 runs synchronously, and the first steam outlet of the evaporation kettle 201 is in a connected state with the steam condensation tank 41, so that the steam in the evaporation kettle 201 can enter the steam condensation tank 41 for condensation. When the condensed water in the steam condensation tank 41 reaches a certain amount, it is discharged into the water storage container 43 of the water collection unit 4 for resource utilization, such as circulating flushing toilets, greening irrigation, etc.

[0104] It can be understood that during the evaporation process, as the water content in the fecal sewage gradually decreases, the liquid level in the evaporator 201 gradually decreases, and the fecal sewage needs to be added to the evaporator 201. At this time, the first main feed valve 601 can be kept closed, and the first micro-feed valve 602 can be opened. The aeration container 101 replenishes the fecal sewage to the evaporator 201 multiple times and in batches through the branch where the first micro-feed valve 602 is located, so that the concentrated liquid after evaporation in the evaporator 201 reaches the set discharge volume, and then is uniformly discharged into the drying unit 3 for further treatment.

[0105] In addition, during the evaporation process, as the water content in the fecal sewage continues to decrease, the fecal sewage gradually becomes thicker and the bubbles gradually increase. The amount of bubbles in the evaporator 201 can be detected through the observation window 207 or the foam sensor 213. When it is determined that the bubbles exceed the upper limit of the bubble level, the bubbles in the evaporator 201 are eliminated by opening the first micro-feed valve 602 to feed or replenishing defoaming liquid.

[0106] S103, discharging the evaporated fecal sewage into the drying unit 3, and the drying unit 3 dries the fecal sewage at a second preset temperature under a second preset negative pressure value, and the second preset temperature is higher than the first preset temperature;

[0107] Specifically, after the evaporation unit 2 removes most of the water, the first air-breaking valve 605 is used to restore the evaporation kettle 201 to a normal pressure state, and then the first discharge valve 607 is opened to connect the first discharge valve 607 of the evaporation kettle 201 with the second feed port of the drying box 301. The concentrated liquid in the evaporation kettle 201 enters the drying box 301 through the electric diaphragm pump 308 and the second feed valve 611 for medium-temperature drying. During the drying process, the drying box 301 maintains a negative pressure state, the negative pressure value is a second preset negative pressure value, and the second preset temperature of the drying box 301 is 60° C.-120° C. By controlling the temperature, pressure and other parameters of the drying box 301, the water in the concentrated liquid is evaporated to obtain a dried fluid product.

[0108] Since the drying unit 3 can also remove part of the water in the concentrated liquid in the form of steam, the second steam outlet of the drying box 301 can also be connected to the steam condensation tank 41 of the moisture collection unit 4, so that the steam in the drying box 301 can enter the steam condensation tank 41 for condensation. When the condensed water in the steam condensation tank 41 reaches a certain amount, it is discharged into the water storage container 43 of the moisture collection unit 4 for resource utilization, such as circulating flushing toilets, watering greenery, etc.

[0109] During the drying process, since the concentration of the concentrate is relatively high and the water content gradually decreases, in order to improve the drying effect, the stirring drive member 304 can be controlled to drive the stirring member 306 to rotate through the transmission shaft 305 to stir the concentrate in the drying box 301, which is beneficial to improve the temperature uniformity of the concentrate and thus improve the drying efficiency.

[0110] S104, discharge the fluidized material after drying treatment by the drying unit 3.

[0111] The dried fluidized material is discharged through the second discharge port 310 of the drying box 301 into the waste residue collection box for resource utilization, such as being used as fertilizer, biofuel, etc.

[0112] According to the fecal sewage treatment process of the embodiment of the present utility model, the fecal sewage is aerated by the aeration unit 1 to reduce the concentration of bacterial microorganisms and odor in the fecal sewage, reduce large particle solids, and increase the fluidity of the fecal sewage; through the evaporation unit 2, most of the water in the fecal sewage can be removed to form a concentrated solution of fecal sewage; through the drying unit 3, the water in the concentrated solution can be further evaporated to obtain a dried fluidized material, and the fluidized material can be used for resource utilization. Through the water collection unit 4, most of the water separated from the fecal sewage can be re-collected and utilized, which is beneficial to reducing water resource waste and reducing the treatment cost. Thus, the fecal sewage treatment process of this embodiment, through the mutual cooperation of multiple steps such as aeration treatment, evaporation treatment, and drying treatment, can improve the treatment effect of fecal sewage, reduce the environmental pollution caused by fecal sewage, and is applicable to the treatment of fecal sewage with a relatively high concentration and treatment difficulty, expanding the scope of use and having higher practicability.

[0113] In some embodiments, the first preset temperature is 35°C - 45°C. For example, the first preset temperature can be 35°C, 36°C, 37°C, 38°C, 39°C, 40°C, 41°C, 42°C, 43°C, 44°C or 45°C. Of course, the present utility model does not limit this. The first preset temperature can be reasonably set within the above range according to actual needs to enable the evaporation unit 2 to implement the low-temperature evaporation process to ensure the evaporation efficiency of the evaporation unit 2 to the greatest extent.

[0114] Optionally, the first preset negative pressure value is 0.08 MPa - 0.099 MPa. For example, the first preset negative pressure value is 0.08 MPa, 0.085 MPa, 0.09 MPa, 0.095 MPa, 0.099 MPa, etc. Of course, the present utility model does not limit this. The first preset negative pressure value can be reasonably set within the above range according to actual needs to ensure the evaporation efficiency of the evaporation unit 2 to the greatest extent.

[0115] Optionally, the second preset temperature is 60°C - 120°C. For example, the second preset temperature can be 60°C, 70°C, 80°C, 90°C, 100°C, 110°C or 120°C. Of course, the present utility model does not limit this. The second preset temperature can be reasonably set within the above range according to actual needs to enable the drying unit 3 to implement the medium-temperature drying process and ensure the drying efficiency of the drying unit 3 to the greatest extent.

[0116] Optionally, the second preset negative pressure value is 0.008 MPa - 0.009 MPa. For example, the second preset negative pressure value can be 0.008 MPa, 0.0085 MPa, 0.009 MPa, etc. Of course, the present utility model does not limit this. The second preset negative pressure value can be reasonably set within the above range according to actual needs to ensure the drying efficiency of the drying unit 3 to the greatest extent.

[0117] In some embodiments, aerating the fecal sewage entering the aeration unit 1 includes: performing ozone aeration on the fecal sewage, wherein the concentration of ozone is 15 mg / L - 25 mg / L, and the flow rate of ozone is 60 L / min - 90 L / min. For example, the concentration of ozone can be 15 mg / L, 18 mg / L, 20 mg / L, 22 mg / L, or 25 mg / L, etc.; the flow rate of ozone can be 60 L / min, 70 L / min, 80 L / min, 90 L / min. In this way, it can ensure that there is sufficient ozone in the fecal sewage, increase the oxygen content, which is beneficial for sterilization and disinfection, as well as microbial decomposition, removing odors, and lightening the color of the sewage.

[0118] In this specification, the various embodiments or implementation manners are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0119] It should be noted that the embodiments referred to in the specification, such as "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc., may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures, or characteristics with an embodiment, it is within the knowledge scope of those skilled in the art to implement such features, structures, or characteristics in combination with other embodiments, whether explicitly or implicitly described.

[0120] Generally speaking, terms should be understood at least in part by their use in the context. For example, at least in part according to the context, the term "one or more" used in the text can be used to describe any feature, structure, or characteristic in the sense of a singular, or can be used to describe a combination of features, structures, or characteristics in the sense of a plural. Similarly, at least in part according to the context, terms such as "a" or "the" can also be understood to convey a singular usage or a plural usage.

[0121] It should be easily understood that the terms "on", "above", and "over" in this disclosure should be interpreted in the broadest manner, such that "on" not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over something", but may also include the meaning of "above" or "over something" with no intermediate features or layers therebetween (i.e., directly on something).

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A fecal sewage treatment system, characterized in that: include: an aeration unit configured to aerate the fecal wastewater; an evaporation unit, disposed at the downstream side of the aeration unit and in communication with the aeration unit, the evaporation unit being configured to perform evaporation treatment on the fecal wastewater treated by the aeration unit; A drying unit, connected to the evaporation unit, and configured to perform drying treatment on the material processed by the evaporation unit; a moisture collection unit, connected to the evaporation unit and the drying unit respectively, and configured to collect moisture evaporated by the evaporation unit and the drying unit; The heat pump unit is in communication with the moisture collection unit, and is configured to provide a heat exchange medium to the moisture collection unit to cool and liquefy the steam entering the moisture collection unit.

2. The feces and sewage treatment system according to claim 1, characterized in that: The moisture collection unit comprises: The steam condensation module comprises: a steam condensation tank and a first cooling coil, wherein the steam condensation tank is communicated with the evaporation unit and the drying unit respectively, the first cooling coil is arranged on the steam condensation tank and is communicated with the heat pump unit, and the heat pump unit is configured to provide a heat exchange medium to the first cooling coil; A water storage module is communicated with the steam condensation tank, and the water storage module is configured to store condensed water in the steam condensation tank.

3. The feces and sewage treatment system according to claim 2, characterized in that: The water storage module includes: a water storage container, the water storage container is communicated with the steam condensation tank, and the water storage container is configured to store condensed water in the steam condensation tank.

4. The feces and sewage treatment system according to claim 3, characterized in that: The water storage module further includes: a centrifugal pump and a water ejector. The water storage container, the centrifugal pump and the water ejector are sequentially connected through pipelines to form a circulation loop. The centrifugal pump drives the water in the water storage container to circulate in the circulation loop. The steam condensation tank is communicated with the water ejector, and the water ejector draws the condensed water in the steam condensation tank into the circulation loop when the water ejector is in operation.

5. The fecal wastewater treatment system according to claim 3, characterized in that: The water storage module further includes: a second cooling coil, which is disposed in the water storage container and is cyclically connected to the heat pump unit, and the heat pump unit is configured to provide heat exchange medium to the second cooling coil.

6. The fecal wastewater treatment system according to claim 3, characterized in that: The water storage module also includes: A first liquid level sensor is disposed in the water storage container to detect the liquid level in the water storage container. The water storage container is configured to drain water when the detection result of the first liquid level sensor is greater than a preset liquid level value.

7. The feces and sewage treatment system according to claim 2, characterized in that: The aeration unit comprises: Aeration containers for storing fecal wastewater; An aeration pipeline, one end of which is connected to an external air supply device, and the other end of which extends below the liquid level of the feces and sewage in the aeration container to aerate the feces and sewage with a gas medium, wherein the gas medium includes ozone.

8. The feces and sewage treatment system according to claim 7, characterized in that: The evaporation unit comprises: An evaporator, the evaporator is connected to the aeration container through a pipeline, the evaporator is also provided with a first discharge port and a first steam outlet, the first discharge port is used to discharge the evaporated material, and the first steam outlet is connected to the steam condenser; The evaporation component is arranged in the evaporation kettle to evaporate the feces and sewage.

9. The fecal wastewater treatment system according to claim 8, characterized in that: The evaporation assembly includes a first evaporation coil, the first evaporation coil is in communication with the heat pump unit, and the heat pump unit is further configured to provide a heat exchange medium to the first evaporation coil.

10. The fecal wastewater treatment system according to claim 8, characterized in that: The drying unit comprises: A drying box, the drying box is connected to the first discharge port through a pipeline, the drying box has a second discharge port and a second steam outlet, the second discharge port is used to discharge the dried material, and the second steam outlet is connected to the steam condenser; A heating element is disposed in the drying box and is used to heat the material to evaporate the water in the material.

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