Domestic sewage resource utilization equipment

Abstract

The invention relates to the technical field of sewage treatment, and discloses domestic sewage resource utilization equipment which comprises a black water fermentation device, a grey water storage device, a monitoring assembly, a mixing device, a pump set and a controller. A black water inlet and a supernatant outlet are formed in the black water fermentation device. And the grey water storage device is provided with a grey water inlet and a grey water outlet. The monitoring assembly comprises a first nitrogen content detection device for monitoring the nitrogen content in the supernate and a second nitrogen content detection device for monitoring the nitrogen content in the grey water. And the mixing device is provided with a supernate mixing inlet and a grey water mixing inlet. The pump set comprises a first water pump and a second water pump, the first water pump is arranged on a communicating pipeline between the supernate outlet and the supernate mixing inlet, and the second water pump is arranged on a communicating pipeline between the grey water outlet and the grey water mixing inlet. The first nitrogen content detection device, the second nitrogen content detection device, the first water pump and the second water pump are all in communication connection with the controller.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a domestic sewage resource utilization device. Background Art

[0002] Domestic sewage includes black water and gray water. Black water refers to high-concentration domestic sewage produced by flushing toilet feces, and gray water refers to low-concentration domestic sewage such as kitchen water, laundry and bathing water other than toilet flushing water. The current method of resource utilization of black water and gray water is mainly to ferment black water and mix it with gray water, and use the mixed liquid as fertilizer water to irrigate crops. However, the nutrient composition of black water and gray water is quite different, and the current mixing ratio of black water fermentation products and gray water is quite random, resulting in an imbalance in the nutrient ratio of fertilizer water, which has a poor promoting effect on crop growth and even causes damage to crops in some cases.

[0003] Therefore, there is an urgent need for a domestic sewage resource utilization device to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a domestic sewage resource utilization device to ensure that the nitrogen content in the mixed liquid meets the needs of irrigation and fertilization.

[0005] In order to achieve the above object, the present invention provides a domestic sewage resource utilization device, which comprises: A black water fermentation device, which is used for fermenting black water, and is provided with a black water inlet for black water to enter and a supernatant outlet for supernatant generated by black water fermentation to be discharged; A grey water storage device, which is used to store grey water, wherein the grey water storage device is provided with a grey water inlet for grey water to enter and a grey water outlet for grey water to flow out; a monitoring assembly including a first nitrogen content detection device for monitoring the nitrogen content in the supernatant and a second nitrogen content detection device for monitoring the nitrogen content in the grey water; a mixing device, on which a supernatant liquid mixing inlet and a gray water mixing inlet are provided, the supernatant liquid mixing inlet is communicated with the supernatant liquid outlet, and the gray water inlet is communicated with the gray water outlet; A pump group, comprising a first water pump and a second water pump, wherein the first water pump is arranged on a communication pipeline between the supernatant liquid outlet and the supernatant liquid mixing inlet, and the second water pump is arranged on a communication pipeline between the grey water outlet and the grey water mixing inlet; A controller, wherein the first nitrogen content detection device, the second nitrogen content detection device, the first water pump and the second water pump are all communicatively connected to the controller, and the controller is used to determine the mixing ratio of the supernatant and the gray water according to the monitoring value of the first nitrogen content detection device, the monitoring value of the second nitrogen content detection device and the preset value of the nitrogen content of the fertilizer water, and control the first water pump and the second water pump to pump the supernatant and the gray water into the mixing device according to the mixing ratio, and the supernatant and the gray water are mixed in the mixing device to form a mixed liquid.

[0006] As an improvement of the above technical solution, a mixing chamber is provided in the mixing device, and the supernatant mixing inlet and the gray water mixing inlet are both connected to the mixing chamber; The monitoring assembly further comprises a phosphorus content detection device and a liquid level detection device, wherein the phosphorus content detection device is disposed in the mixing chamber and is used to monitor the phosphorus content in the mixed liquid, and the liquid level detection device is used to monitor the liquid level of the mixed liquid in the mixing chamber; The domestic sewage resource utilization equipment also includes a phosphate fertilizer adding device, and the phosphate fertilizer adding device is arranged on the mixing device; The phosphorus content detection device and the phosphate fertilizer adding device are both communicatively connected to the controller, and the controller is also used to determine the volume of the mixed liquid in the mixing chamber according to the monitoring value of the liquid level detection device, and control the phosphate fertilizer adding device to add phosphate fertilizer to the mixed liquid according to the monitoring value of the phosphorus content detection device, the preset value of the phosphorus content of the fertilizer water and the volume of the mixed liquid in the mixing chamber.

[0007] As an improvement of the above technical solution, the domestic sewage resource utilization equipment also includes a potassium fertilizer adding device, which is arranged on the mixing device. The potassium fertilizer adding device is communicatively connected to the controller, and the controller is also used to control the potassium fertilizer adding device to add potassium fertilizer to the mixed liquid according to the volume of the mixed liquid in the mixing chamber and a preset value of the potassium content of the fertilizer water.

[0008] As an improvement of the above technical solution, the monitoring component further includes a pH value measuring instrument, which is arranged in the mixing chamber and is used to monitor the pH value of the mixed liquid; The domestic sewage resource utilization equipment also includes a pH regulating device, and the pH regulating device is arranged on the mixing device; The pH meter and the pH adjusting device are both communicatively connected to the controller, and the controller is also used to control the pH adjusting device to add pH adjusting reagent to the mixed liquid according to the measured value of the pH meter, the volume of the mixed liquid in the mixing chamber, and the preset pH value of the fertilizer water.

[0009] As an improvement of the above technical solution, it also includes a supernatant storage tank, which is provided with a supernatant storage cavity, a supernatant collection port and a supernatant supply port, the supernatant collection port and the supernatant supply port are both connected to the supernatant storage cavity, the supernatant outlet is connected to the supernatant collection port, the supernatant supply port is connected to the supernatant mixing inlet, the first nitrogen content detection device is arranged in the supernatant storage tank, and the first water pump is arranged on the connecting pipeline between the supernatant supply port and the supernatant mixing inlet.

[0010] As an improvement of the above technical solution, it also includes: a supernatant supply pipeline, which is disposed in the supernatant storage cavity, and one end of which is in communication with the supernatant storage cavity, and the other end of which is in communication with the supernatant supply port; a first float, which is arranged at one end of the supernatant supply pipeline communicating with the supernatant storage chamber and floats on the water surface in the supernatant storage chamber to drive the one end of the supernatant supply pipeline communicating with the supernatant storage chamber to float up and down as the liquid level in the supernatant storage chamber changes; A grey water supply pipeline, wherein a grey water storage chamber is provided in the grey water storage device, the grey water inlet and the grey water outlet are both in communication with the grey water storage chamber, the grey water supply pipeline is provided in the grey water storage chamber, one end of the grey water supply pipeline is in communication with the grey water storage chamber, and the other end of the grey water supply pipeline is in communication with the grey water storage chamber; A second float is arranged at one end of the grey water supply pipeline connected to the grey water storage chamber, and floats on the water surface in the grey water storage chamber to drive the end of the grey water supply pipeline connected to the grey water storage chamber to float up and down as the liquid level in the grey water storage chamber changes.

[0011] As an improvement of the above technical solution, the supernatant supply pipeline includes a first pipe joint and a first supply pipe, one end of the first supply pipe is connected to the supernatant supply port, and the other end is connected to the bottom of the first float through the first pipe joint, and a first liquid inlet port is provided on the side wall of the first pipe joint; The grey water supply pipeline includes a second pipe joint and a second supply pipe, one end of the second supply pipe is connected to the grey water outlet, and the other end is connected to the bottom of the second float via the second pipe joint, and a second liquid inlet port is provided on the side wall of the second pipe joint.

[0012] As an improvement of the above technical solution, it also includes a stirrer, which is arranged in the mixing device and is communicatively connected with the controller.

[0013] As an improvement of the above technical solution, it also includes a fertilizer water supply pipeline, the mixing device is provided with a fertilizer water supply port, one end of the fertilizer water supply pipeline is connected to the fertilizer water supply port, and the pump group also includes a third water pump arranged on the fertilizer water supply pipeline, and the third water pump is communicatively connected to the controller.

[0014] As an improvement of the above technical solution, it also includes a sprinkler irrigation device, and the fertilizer water supply pipeline is connected to the sprinkler irrigation device.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The domestic sewage resource utilization equipment of the present invention monitors the nitrogen content in the supernatant and the gray water respectively through the monitoring components, and takes the nitrogen content as the basis for judging the mixing ratio of the supernatant and the gray water, so that the nitrogen content in the mixed liquid formed by mixing the supernatant and the gray water is close to or even equal to the preset value of the nitrogen content of the fertilizer water, thereby ensuring that the nitrogen content in the mixed liquid meets the needs of irrigation and fertilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a domestic sewage resource utilization device provided by an embodiment of the present invention; Figure 2 yes Figure 1 The enlarged view of point A in the middle; Figure 3 yes Figure 1 The enlarged view of point B in the middle; Figure 4 yes Figure 1 Enlarged view of point C in the middle.

[0017] In the figure: 11. Black water fermentation device; 111. Black water inlet; 112. Supernatant liquid outlet; 12. Grey water storage device; 121. Grey water inlet; 122. Grey water outlet; 123. Grey water storage chamber; 13. Monitoring component; 131. First nitrogen content detection device; 132. Second nitrogen content detection device; 133. Phosphorus content detection device; 134. Liquid level detection device; 135. PH value measuring instrument; 14. Mixing device; 141. Supernatant liquid mixing inlet; 142. Ash water mixing inlet; 143. Mixing chamber; 144. Fertilizer water supply port; 15. Pump group; 151. First water pump; 152. Second water pump; 153. Third water pump; 16. Phosphate fertilizer adding device; 17. Potash fertilizer adding device; 18. PH adjustment device; 19. supernatant storage tank; 191. supernatant storage chamber; 192. supernatant collection port; 193. supernatant supply port; 20. supernatant liquid supply pipeline; 201. first pipe joint; 2011. first liquid inlet port; 202. first supply pipe; 21. First float; 22. Grey water supply pipeline; 221. Second pipe joint; 2211. Second liquid inlet port; 222. Second supply pipe; 23. Second float; 24. Agitator; 25. Fertilizer and water supply pipeline; 26. Filter device; 27. Black water collection pipeline; 28. Grey water collection pipeline. DETAILED DESCRIPTION

[0018] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0021] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0022] like Figure 1-Figure 4 As shown, this embodiment provides a domestic sewage resource utilization device, including a black water fermentation device 11, a gray water storage device 12, a monitoring component 13, a mixing device 14 and a pump group 15.

[0023] The black water fermentation device 11 is used for fermenting black water. The black water fermentation device 11 is provided with a black water inlet 111 for black water to enter and a supernatant outlet 112 for supernatant generated by black water fermentation to be discharged.

[0024] The grey water storage device 12 is used to store grey water, and is provided with a grey water inlet 121 for grey water to enter and a grey water outlet 122 for grey water to flow out. The monitoring component 13 includes a first nitrogen content detection device 131 for monitoring the nitrogen content in the supernatant and a second nitrogen content detection device 132 for monitoring the nitrogen content in the grey water.

[0025] The mixing device 14 is provided with a supernatant liquid mixing inlet 141 and a gray water mixing inlet 142 . The supernatant liquid mixing inlet 141 is communicated with the supernatant liquid outlet 112 , and the gray water mixing inlet 142 is communicated with the gray water outlet 122 .

[0026] The pump group 15 includes a first water pump 151 and a second water pump 152 . The first water pump 151 is disposed on a connecting pipe between the supernatant liquid outlet 112 and the supernatant liquid mixing inlet 141 , and the second water pump 152 is disposed on a connecting pipe between the grey water outlet 122 and the grey water mixing inlet 142 .

[0027] The first nitrogen content detection device 131, the second nitrogen content detection device 132, the first water pump 151 and the second water pump 152 are all connected to the controller for communication. The controller is used to determine the mixing ratio of the supernatant liquid and the gray water according to the monitoring value of the first nitrogen content detection device 131, the monitoring value of the second nitrogen content detection device 132 and the preset value of the nitrogen content of the fertilizer water, and control the first water pump 151 and the second water pump 152 to pump the supernatant liquid and the gray water into the mixing device 14 according to the mixing ratio, and the supernatant liquid and the gray water are mixed in the mixing device 14 to form a mixed liquid. Specifically, the first water pump 151 pumps the supernatant liquid into the mixing device 14 through the supernatant liquid mixing inlet 141, and the second water pump 152 pumps the gray water into the mixing device 14 through the gray water mixing inlet 142.

[0028] The black water in this embodiment refers to high-concentration domestic sewage generated by flushing toilet feces, and the grey water refers to low-concentration domestic sewage such as kitchen water, laundry and bathing water other than toilet flushing water. The black water fermentation device 11 in this embodiment is an underground integrated three-compartment septic tank.

[0029] It can be understood by those skilled in the art that the supernatant produced by black water fermentation has too high a nutrient concentration. In order to avoid damage to crops, it needs to be diluted for use, while the nutrient concentration in gray water is low and it is difficult to meet the needs of fertilization. In this embodiment, the supernatant and gray water are mixed to obtain a mixed solution. The nutrient concentration of the mixed solution is between that of the supernatant and the gray water, which is more suitable for fertilizing crops. Among the nutrients such as nitrogen, phosphorus and potassium required for crop growth, nitrogen is required in the largest amount. Nitrogen fertilizer is also the most commonly used fertilizer in crop planting, and the nitrogen content of various nutrients suitable for crops in black water and gray water is generally the highest. Therefore, in this embodiment, the nitrogen content in the supernatant and gray water is monitored respectively by the monitoring component 13, and the nitrogen content is used as the basis for judging the mixing ratio of the supernatant and gray water, so that the nitrogen content in the mixed solution formed by the mixture of the supernatant and gray water is close to or even equal to the preset value of the nitrogen content of the fertilizer water, thereby ensuring that the nitrogen content in the mixed solution meets the needs of irrigation and fertilization, and will not be too high or too low. The preset value of the nitrogen content of the fertilizer water can be specifically set according to the type of plant that needs to be irrigated.

[0030] In the present embodiment, the first nitrogen content detection device 131 and the second nitrogen content detection device 132 are both online total nitrogen analyzers. The online total nitrogen analyzer is an existing product, and its structure and principle are not described in detail here.

[0031] Furthermore, if Figure 1 and Figure 3As shown, a mixing chamber 143 is provided in the mixing device 14, and the supernatant mixing inlet 141 and the gray water mixing inlet 142 are both connected to the mixing chamber 143. The monitoring component 13 also includes a phosphorus content detection device 133 and a liquid level detection device 134. The phosphorus content detection device 133 is arranged in the mixing chamber 143 to monitor the phosphorus content in the mixed liquid, and the liquid level detection device 134 is used to monitor the liquid level of the mixed liquid in the mixing chamber 143. The domestic sewage resource utilization equipment also includes a phosphate fertilizer adding device 16, which is arranged on the mixing device 14 and is used to add phosphate fertilizer to the mixed liquid. The phosphorus content detection device 133 and the phosphate fertilizer adding device 16 are both connected to the controller for communication. The controller is also used to judge the volume of the mixed liquid in the mixing chamber 143 according to the liquid level in the mixing chamber 143, and control the phosphate fertilizer adding device 16 to add phosphate fertilizer to the mixed liquid according to the monitoring value of the phosphorus content detection device 133, the preset value of the phosphorus content of the fertilizer water and the volume of the mixed liquid to obtain a secondary mixed liquid. Specifically, the controller determines the amount of phosphate fertilizer required to increase the phosphorus content in the mixed liquid to the preset value of the phosphorus content in the fertilizer water based on the phosphorus content in the mixed liquid, the preset value of the phosphorus content in the fertilizer water, and the volume of the mixed liquid in the mixing chamber 143, and then controls the phosphate fertilizer adding device 16 to add the required amount of phosphate fertilizer to the mixed liquid.

[0032] Generally, the phosphorus content in black water and gray water is low, resulting in that the phosphorus content in the mixed solution is difficult to meet the needs of crops for phosphorus. In order to meet the needs of crops for phosphorus, a phosphorus content detection device 133 is provided in this embodiment to monitor the phosphorus content in the mixed solution formed by mixing the supernatant and the gray water, and phosphorus fertilizer is added to the mixed solution according to the phosphorus content in the mixed solution, the preset value of the phosphorus content of the fertilizer water, and the volume of the mixed solution in the mixing chamber 143, so that the phosphorus content in the mixed solution is also close to or reaches the preset value of the phosphorus content of the fertilizer water, thereby ensuring that the phosphorus content in the mixed solution meets the needs of irrigation and fertilization, and solving the problem of too low phosphorus content in the mixed solution. The preset value of the phosphorus content of the fertilizer water can be specifically set according to the type of plant that needs to be irrigated.

[0033] The phosphorus content detection device 133 in this embodiment is an online total phosphorus analyzer. The online total phosphorus analyzer and the liquid level detection device 134 are both existing equipment in the field, and their specific structures and principles are not repeated here.

[0034] Furthermore, if Figure 1 and Figure 3As shown, the domestic sewage resource utilization equipment provided in this embodiment also includes a potash fertilizer adding device 17, which is arranged on the mixing device 14 and is used to add potash fertilizer to the mixed liquid in the mixing device 14. The potash fertilizer adding device 17 is connected to the controller in communication, and the controller is also used to control the potash fertilizer adding device 17 to add potash fertilizer to the mixed liquid according to the volume of the mixed liquid in the mixing chamber 143 and the preset value of the potassium content of fertilizer water, so as to obtain three mixed liquids. Generally, the potassium content in the supernatant and gray water of black water fermentation is extremely low and can be ignored. Therefore, in this embodiment, the potassium content in the mixed liquid is regarded as zero, and the potassium fertilizer amount required to increase the potassium content in the mixed liquid to the preset value of the potassium content of fertilizer water is directly determined according to the volume of the mixed liquid in the mixing chamber 143 and the preset value of the potassium content of fertilizer water, and the required amount of potash fertilizer is added to the mixed liquid, so that the potassium content in the mixed liquid is also close to or reaches the preset value of the potassium content of fertilizer water, thereby ensuring that the potassium content in the mixed liquid meets the needs of irrigation and fertilization, and solving the problem of too low potassium content in the mixed liquid. The preset value of the potassium content of fertilizer water can be specifically set according to the type of plants that need to be irrigated.

[0035] Furthermore, if Figure 1 and Figure 3As shown, the monitoring component 13 also includes a pH meter 135, which is disposed on the mixing device 14 and is used to monitor the pH value of the mixed liquid in the mixing device 14. The domestic sewage resource utilization equipment also includes a pH regulating device 18, which is disposed in the mixing chamber 143 and is used to add a pH regulating agent to the mixed liquid. The pH meter 135 and the pH regulating device 18 are both communicatively connected to the controller, and the controller is also used to control the pH regulating device 18 to add a pH regulating agent to the mixed liquid in the mixing device 14 according to the measurement value of the pH meter 135, the volume of the mixed liquid in the mixing chamber 143, and the preset pH value of the fertilizer water, so as to obtain a fourth mixed liquid, that is, fertilizer water. When fertilizing crops, if the pH value of the fertilizer water is too low or too high, it will have an adverse effect on the soil and crops. The black water supernatant is generally acidic, the gray water is generally alkaline, the acidity and alkalinity of phosphate fertilizers vary depending on the type, and the acidity and alkalinity of potash fertilizers also vary depending on the type. Therefore, the tertiary mixed liquid obtained after the supernatant and black water are mixed and the phosphate fertilizer and potash fertilizer are added may be acidic or alkaline. In order to avoid the tertiary mixed liquid having a pH value that is too high or too low, a pH value measuring instrument 135 is provided on the mixing device 14 in this embodiment to measure the pH value of the tertiary mixed liquid, and the pH value of the tertiary mixed liquid is adjusted to the pH preset value of the fertilizer water according to the measurement result and the volume of the mixed liquid in the mixing chamber 143. The type and amount of the pH adjusting reagent required for controlling the pH value of the tertiary mixed liquid are finally controlled. The pH adjusting device 18 is added to the tertiary mixed liquid in the amount of the pH adjusting reagent. Specifically, the pH reagent includes an acidic pH reagent and an alkaline pH reagent. In this embodiment, the acidic pH reagent is hydrochloric acid, and the alkaline pH reagent is sodium hydroxide.

[0036] It should be noted that the mixed liquid in the mixing device 14 to which phosphate fertilizer and potassium fertilizer have been added and the pH value has been adjusted needs to be used up completely before the next mixing of the supernatant and the ash water is carried out to avoid the mixing of the potassium fertilizer added last time and the potassium fertilizer added next time, which may cause the potassium content in the mixed liquid to be too high.

[0037] Those skilled in the art can understand that the volume of the mixed liquid corresponding to different liquid levels in the mixing device 14, the preset value of the nitrogen content of the fertilizer water, the preset value of the phosphorus content of the fertilizer water, the preset value of the potassium content of the fertilizer water, and the preset value of the pH of the fertilizer water are all pre-stored in the controller.

[0038] Alternatively, if Figure 1 and Figure 2As shown, the domestic sewage resource utilization equipment provided in this embodiment also includes a supernatant storage tank 19, and the supernatant storage tank 19 is provided with a supernatant storage cavity 191, a supernatant collecting port 192 and a supernatant supply port 193, the supernatant collecting port 192 and the supernatant supply port 193 are both connected to the supernatant storage cavity 191, the supernatant outlet 112 is connected to the supernatant collecting port 192, the supernatant supply port 193 is connected to the supernatant mixing inlet 141, the first nitrogen content detection device 131 is arranged in the supernatant storage tank 19, and the first water pump 151 is arranged on the connecting pipeline between the supernatant supply port 193 and the supernatant mixing inlet 141. A supernatant storage tank 19 is arranged between the black water fermentation device 11 and the mixing device 14. The supernatant produced by fermentation in the black water fermentation device 11 overflows to the supernatant storage tank 19 through the supernatant outlet 112, and is accumulated and stored in the supernatant storage tank 19. The first water pump 151 extracts the stored supernatant from the supernatant storage tank 19, so that when it is necessary to extract the supernatant for mixing with the gray water, a larger amount of supernatant can be extracted at one time, and the supernatant can also be re-precipitated to a certain extent in the supernatant storage tank 19.

[0039] Furthermore, if Figure 1 , Figure 2 and Figure 4 As shown, the domestic sewage resource utilization device provided in this embodiment also includes a supernatant supply pipeline 20, a first float 21, a gray water supply pipeline 22 and a second float 23. The supernatant supply pipeline 20 is arranged in the supernatant storage chamber 191, and one end is connected to the supernatant storage chamber 191, and the other end is connected to the supernatant supply port 193. The first float 21 is arranged at one end of the supernatant liquid supply pipeline 20 connected to the supernatant liquid storage chamber 191, and floats on the water surface in the supernatant liquid storage chamber 191, so as to drive the end of the supernatant liquid supply pipeline 20 connected to the supernatant liquid storage chamber 191 to float up and down with the change of the liquid level in the supernatant liquid storage chamber 191, so that the end of the supernatant liquid supply pipeline 20 connected to the supernatant liquid storage chamber 191 can always remain below the liquid surface of the supernatant, and the supernatant in the supernatant liquid storage chamber 191 is transported to the mixing device 14 through the supernatant liquid supply pipeline 20, and the first water pump 151 can extract the supernatant from the upper layer of the supernatant in the supernatant storage chamber 191, while ensuring that the liquid inlet of the supernatant liquid supply pipeline 20 keeps in contact with the supernatant, preventing the precipitation at the bottom of the supernatant storage chamber 191 from entering the supernatant liquid supply pipeline 20.

[0040] A grey water storage chamber 123 is provided in the grey water storage device 12, and the grey water inlet 121 and the grey water outlet 122 are both connected to the grey water storage chamber 123. The grey water supply pipeline 22 is provided in the grey water storage chamber 123, and one end is connected to the grey water storage chamber 123, and the other end is connected to the grey water outlet 122. The second float 23 is provided at one end of the grey water supply pipeline 22 connected to the grey water storage chamber 123, and floats on the water surface in the grey water storage chamber 123, so as to drive the end of the grey water supply pipeline 22 connected to the grey water storage chamber 123 to float up and down with the change of the liquid level in the grey water storage chamber 123. While ensuring that the liquid inlet of the grey water supply pipeline 22 is in contact with the grey water, the sediment at the bottom of the grey water storage chamber 123 is prevented from entering the grey water supply pipeline 22.

[0041] Furthermore, if Figure 1 , Figure 2 and Figure 4 As shown, the supernatant collection port 192 is disposed at the lower part of the supernatant storage chamber 191 to reduce the disturbance of the upper supernatant in the supernatant storage chamber 191 when the supernatant enters the supernatant storage chamber 191, and further prevents the sediment at the bottom of the supernatant storage chamber 191 from entering the supernatant supply pipeline 20. The grey water inlet 121 is disposed at the lower part of the grey water storage chamber 123 to reduce the disturbance of the upper grey water in the grey water storage chamber 123 when the grey water enters the grey water storage chamber 123, and further prevents the sediment at the bottom of the grey water storage chamber 123 from entering the grey water supply pipeline 22.

[0042] Furthermore, if Figure 1 , Figure 2 and Figure 4 As shown, the supernatant supply pipeline 20 includes a first pipe joint 201 and a first supply pipe 202. One end of the first supply pipe 202 is connected to the supernatant supply port 193, and the other end is connected to the bottom of the first float 21 through the first pipe joint 201. A first liquid inlet port 2011 is provided on the side wall of the first pipe joint 201. The supernatant in the supernatant storage chamber 191 enters the first pipe joint 201 through the first liquid inlet port 2011, and enters the first supply pipe 202 through the first pipe joint 201. The gray water supply pipeline 22 includes a second pipe joint 221 and a second supply pipe 222. One end of the second supply pipe 222 is connected to the gray water outlet 122, and the other end is connected to the bottom of the second float 23 through the second pipe joint 221. A second liquid inlet port 2211 is provided on the side wall of the second pipe joint 221. The grey water in the grey water storage chamber 123 enters the second pipe joint 221 through the second liquid inlet port 2211 , and enters the second supply pipe 222 through the second pipe joint 221 .

[0043] Furthermore, if Figure 1 , Figure 2 and Figure 4As shown, the first float 21 and the second float 23 are both hemispherical, with the spherical surface of the first float 21 and the second float 23 facing upward and the bottom surface facing downward, the top of the first pipe joint 201 is fixedly connected to the bottom surface of the first float 21, and the top of the second pipe joint 221 is fixedly connected to the bottom surface of the second float 23. The inverted hemispherical first float 21 and the second float 23 can more stably support the supernatant supply pipeline 20 and the gray water supply pipeline 22. Preferably, the first pipe joint 201 is fixed to the center of the bottom surface of the first float 21, and the second pipe joint 221 is fixed to the center of the bottom surface of the second float 23.

[0044] Alternatively, if Figure 1 and Figure 3 As shown, the domestic sewage resource utilization equipment provided in this embodiment also includes an agitator 24, which is arranged in the mixing device 14 and is communicatively connected to the controller. The controller is also used to control the agitator 24 to stir the mixed liquid in the mixing chamber 143 to accelerate the dispersion and dissolution of potash fertilizer, phosphate fertilizer and pH adjusting agent, and improve the mixing speed.

[0045] Alternatively, if Figure 1 and Figure 3 As shown, the domestic sewage resource utilization equipment provided in this embodiment also includes a fertilizer water supply pipeline 25, the mixing device 14 is provided with a fertilizer water supply port 144, one end of the fertilizer water supply pipeline 25 is connected to the fertilizer water supply port 144, and the pump group 15 also includes a third water pump 153 provided on the fertilizer water supply pipeline 25, and the third water pump 153 is connected to the controller in communication. The three mixed solutions of the axis after the pH value adjustment are completed are fertilizer water, and the third water pump 153 extracts fertilizer water from the mixing device 14 through the fertilizer water supply pipeline 25 and supplies it to the outside.

[0046] Furthermore, the domestic sewage resource utilization equipment provided in this embodiment also includes a sprinkler device, and the fertilizer water supply pipeline 25 is connected to the sprinkler device. The third water pump 153 supplies fertilizer water to the sprinkler device through the fertilizer water supply pipeline 25 to sprinkle the crops.

[0047] Alternatively, if Figure 1 , Figure 2 and Figure 4 As shown, the domestic sewage resource utilization equipment provided in this embodiment also includes a black water collection pipeline 27 and a gray water collection pipeline 28. One end of the black water collection pipeline 27 is used to collect black water generated by each household, and the other end is connected to the black water inlet 111 of the black water fermentation device 11, and is used to collect the black water generated by each household to the black water fermentation device 11 for fermentation. One end of the gray water collection pipeline 28 is used to collect gray water generated by each household, and the other end is connected to the gray water inlet 121 of the gray water storage device 12 through the filter device 26, and is used to collect the gray water generated by each household to the gray water storage device 12.

[0048] The working principle of the domestic sewage resource utilization equipment provided in this embodiment is as follows: The black water generated by each household is collected to the black water fermentation device 11 through the black water collecting pipe 27, and the gray water generated by each household is collected to the gray water storage device 12 through the gray water collecting pipe 28. The black water fermentation device 11 ferments the black water to obtain a supernatant, and the supernatant overflows to the gray water storage device 12. The controller determines the mixing ratio of the supernatant and the gray water according to the monitoring value of the first nitrogen content detection device 131, the monitoring value of the second nitrogen content detection device 132 and the preset value of the nitrogen content of the fertilizer water, and mixes the supernatant and the gray water according to the mixing ratio to obtain a mixed liquid.

[0049] After the supernatant and the gray water are mixed, the phosphorus content of the mixed liquid is detected, and the volume of the mixed liquid in the mixing chamber 143 is judged according to the monitoring value of the liquid level detection device 134, and the phosphate fertilizer adding device 16 is controlled to add phosphate fertilizer to the mixed liquid according to the monitoring value of the phosphorus content detection device 133, the preset value of the phosphorus content of the fertilizer water and the volume of the mixed liquid in the mixing chamber 143 to obtain a secondary mixed liquid.

[0050] Then, according to the volume of the mixed liquid in the mixing chamber 143 and the preset value of the potassium content of the fertilizer water, the potassium fertilizer adding device 17 is controlled to add potassium fertilizer to the secondary mixed liquid to obtain a tertiary mixed liquid.

[0051] Finally, the pH value of the tertiary mixed liquid is measured, and the pH adjusting device 18 is controlled to add the pH adjusting agent to the tertiary mixed liquid according to the measured value of the pH value meter 135, the volume of the mixed liquid in the mixing chamber 143 and the preset pH value of the fertilizer water to obtain a fourth mixed liquid, that is, the fertilizer water.

[0052] The nitrogen content, phosphorus content, potassium content and pH value of the fertilizer water obtained in this embodiment are close to or equal to the preset values, which ensures the fertilization effect of the fertilizer water and will not cause damage to crops and soil.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. Domestic sewage resource utilization equipment, characterized in that: include: A black water fermentation device (11) for fermenting black water, wherein the black water fermentation device (11) is provided with a black water inlet (111) for black water to enter and a supernatant outlet (112) for supernatant generated by black water fermentation to be discharged; A grey water storage device (12) for storing grey water, wherein the grey water storage device (12) is provided with a grey water inlet (121) for grey water to enter and a grey water outlet (122) for grey water to flow out; A monitoring component (13), comprising a first nitrogen content detection device (131) for monitoring the nitrogen content in the supernatant and a second nitrogen content detection device (132) for monitoring the nitrogen content in the grey water; A mixing device (14) having a supernatant liquid mixing inlet (141) and a grey water mixing inlet (142) provided thereon, wherein the supernatant liquid mixing inlet (141) is in communication with the supernatant liquid outlet (112), and the grey water inlet (121) is in communication with the grey water outlet (122); A pump group (15), comprising a first water pump (151) and a second water pump (152), wherein the first water pump (151) is arranged on a communication pipeline between the supernatant liquid outlet (112) and the supernatant liquid mixing inlet (141), and the second water pump (152) is arranged on a communication pipeline between the grey water outlet (122) and the grey water mixing inlet (142); A controller, wherein the first nitrogen content detection device (131), the second nitrogen content detection device (132), the first water pump (151) and the second water pump (152) are all communicatively connected to the controller, and the controller is used to determine the mixing ratio of the supernatant liquid and the gray water according to the monitoring value of the first nitrogen content detection device (131), the monitoring value of the second nitrogen content detection device (132) and the preset value of the nitrogen content of the fertilizer water, and control the first water pump (151) and the second water pump (152) to pump the supernatant liquid and the gray water into the mixing device (14) according to the mixing ratio, and the supernatant liquid and the gray water are mixed in the mixing device (14) to form a mixed liquid.

2. The domestic sewage resource utilization equipment according to claim 1 is characterized in that: A mixing chamber (143) is provided in the mixing device (14), and the supernatant mixing inlet (141) and the grey water mixing inlet (142) are both in communication with the mixing chamber (143); The monitoring component (13) further comprises a phosphorus content detection device (133) and a liquid level detection device (134); the phosphorus content detection device (133) is arranged in the mixing chamber (143) and is used to monitor the phosphorus content in the mixed liquid; the liquid level detection device (134) is used to monitor the liquid level of the mixed liquid in the mixing chamber (143); The domestic sewage resource utilization equipment further comprises a phosphate fertilizer adding device (16), wherein the phosphate fertilizer adding device (16) is arranged on the mixing device (14); The phosphorus content detection device (133) and the phosphate fertilizer adding device (16) are both communicatively connected to the controller, and the controller is also used to determine the volume of the mixed liquid in the mixing chamber (143) based on the monitoring value of the liquid level detection device (134), and to control the phosphate fertilizer adding device (16) to add phosphate fertilizer to the mixed liquid based on the monitoring value of the phosphorus content detection device (133), the preset value of the phosphorus content of the fertilizer water, and the volume of the mixed liquid in the mixing chamber (143).

3. The domestic sewage resource utilization equipment according to claim 2 is characterized in that: It also includes a potash fertilizer adding device (17), the potash fertilizer adding device (17) being arranged on the mixing device (14), the potash fertilizer adding device (17) being communicatively connected to the controller, and the controller being further used to control the potash fertilizer adding device (17) to add potash fertilizer to the mixed liquid according to the volume of the mixed liquid in the mixing chamber (143) and a preset value of the potassium content of the fertilizer water.

4. The domestic sewage resource utilization equipment according to claim 3 is characterized in that: The monitoring component (13) further comprises a pH value measuring instrument (135), wherein the pH value measuring instrument (135) is arranged in the mixing chamber (143) and is used to monitor the pH value of the mixed liquid; The domestic sewage resource utilization equipment further comprises a pH regulating device (18), wherein the pH regulating device (18) is arranged on the mixing device (14); The pH value measuring instrument (135) and the pH adjusting device (18) are both communicatively connected to the controller, and the controller is also used to control the pH adjusting device (18) to add a pH adjusting agent to the mixed liquid based on the measurement value of the pH value measuring instrument (135), the volume of the mixed liquid in the mixing chamber (143), and the preset pH value of the fertilizer water.

5. The domestic sewage resource utilization equipment according to any one of claims 1 to 4, characterized in that: The invention also comprises a supernatant storage tank (19), wherein the supernatant storage tank (19) is provided with a supernatant storage chamber (191), a supernatant collection port (192) and a supernatant supply port (193); the supernatant collection port (192) and the supernatant supply port (193) are both in communication with the supernatant storage chamber (191); the supernatant outlet (112) is in communication with the supernatant collection port (192); the supernatant supply port (193) is in communication with the supernatant mixing inlet (141); the first nitrogen content detection device (131) is arranged in the supernatant storage tank (19); and the first water pump (151) is arranged on a communication pipeline between the supernatant supply port (193) and the supernatant mixing inlet (141).

6. The domestic sewage resource utilization equipment according to claim 5 is characterized in that: Also includes: a supernatant supply pipeline (20), which is disposed in the supernatant storage chamber (191), one end of which is in communication with the supernatant storage chamber (191), and the other end of which is in communication with the supernatant supply port (193); a first float (21), which is arranged at one end of the supernatant supply pipeline (20) communicating with the supernatant storage chamber (191) and floats on the water surface in the supernatant storage chamber (191) to drive the end of the supernatant supply pipeline (20) communicating with the supernatant storage chamber (191) to float up and down as the liquid level in the supernatant storage chamber (191) changes; A grey water supply pipeline (22), wherein a grey water storage chamber (123) is provided in the grey water storage device (12), the grey water inlet (121) and the grey water outlet (122) are both in communication with the grey water storage chamber (123), and the grey water supply pipeline (22) is provided in the grey water storage chamber (123), with one end in communication with the grey water storage chamber (123) and the other end in communication with the grey water outlet (122); A second float (23) is arranged at one end of the grey water supply pipeline (22) communicating with the grey water storage chamber (123), and floats on the water surface in the grey water storage chamber (123), so as to drive the end of the grey water supply pipeline (22) communicating with the grey water storage chamber (123) to float up and down as the liquid level in the grey water storage chamber (123) changes.

7. The domestic sewage resource utilization equipment according to claim 6 is characterized in that: The supernatant liquid supply pipeline (20) comprises a first pipe joint (201) and a first supply pipe (202); one end of the first supply pipe (202) is connected to the supernatant liquid supply port (193), and the other end is connected to the bottom of the first float (21) via the first pipe joint (201); a first liquid inlet port (2011) is provided on the side wall of the first pipe joint (201); The grey water supply pipeline (22) comprises a second pipe joint (221) and a second supply pipe (222); one end of the second supply pipe (222) is in communication with the grey water outlet (122), and the other end is connected to the bottom of the second float (23) via the second pipe joint (221); a second liquid inlet port (2211) is provided on the side wall of the second pipe joint (221).

8. The domestic sewage resource utilization equipment according to any one of claims 1 to 3, characterized in that: It also includes a stirrer (24), the stirrer (24) being arranged in the mixing device (14), and the stirrer (24) being communicatively connected to the controller.

9. The domestic sewage resource utilization equipment according to any one of claims 1 to 3, characterized in that: It also includes a fertilizer water supply pipeline (25), the mixing device (14) is provided with a fertilizer water supply port (144), one end of the fertilizer water supply pipeline (25) is in communication with the fertilizer water supply port (144), and the pump group (15) also includes a third water pump (153) provided on the fertilizer water supply pipeline (25), and the third water pump (153) is in communication connection with the controller.

10. The domestic sewage resource utilization equipment according to claim 9, characterized in that: It also includes a sprinkler irrigation device, and the fertilizer water supply pipeline (25) is connected to the sprinkler irrigation device.

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