Multi-stage pipeline continuous sewage acidification method and system

Abstract

The present invention provides a multi-stage continuous manure water acidification method and system, comprising: conveying manure water to be acidified into a pipeline; obtaining first pH information, first flow rate information, first liquid level information, and first solid content information of the manure water in a first region; obtaining a first acid addition amount; adding acid to the first region; ... obtaining nth pH information, nth flow rate information, nth liquid level information, and nth solid content information of the manure water in an nth region; determining that the nth pH information is greater than a preset pH value and obtaining an nth acid addition amount; adding acid to the pipeline; determining that the nth pH information is less than a preset pH value and ceasing to add acid to the nth region; and discharging the acidified manure water into a storage tank. The present invention aims to address the problems of conventional manure water acidification requiring the construction of an acidification tank, which is resource-intensive and difficult to construct, and the high power consumption of the conventional manure water acidification process.

Description

Technical Field

[0001] The present invention relates to the technical field of aquaculture manure water acidification devices, and in particular to a multi-section pipeline continuous manure water acidification method and system. Background Art

[0002] At present, the acidification technology for fertilizer water (including manure and biogas slurry) in farms mainly uses acidification tanks to carry out sequential batch acidification of the aquaculture fertilizer water. It is difficult for farms that have already been built and are in operation to spare land for the construction of supporting facilities for the construction of acidification tanks, which limits the promotion and application of fertilizer water acidification technology. At the same time, when the fertilizer water is acidified in the acidification tank, it needs to be equipped with a high-power stirring device, which has high energy consumption and increases the operating cost of the fertilizer water acidification process.

[0003] Patent application number 201811605895.6 proposes a sequential batch manure acidification, storage and treatment device and method. The device collects manure through an acidification tank for acidification. During the acidification process, a stirring device needs to be started to mix the manure, thereby realizing the automated control of the acidification process. However, the manure acidification process requires the construction of an acidification tank, which occupies additional land for supporting facilities. The stirring device consumes a large amount of electricity, which increases the operating cost of the manure acidification process.

[0004] Patent application number 202022046633.X proposes a manure and urine acidification device for livestock pens. This device uses a surface spray method to acidify the manure and urine mixture within the pens, thereby controlling ammonia levels. This device is a sequencing batch acidification device, and installing it in every livestock shed would require significant investment.

[0005] The patent application number 201821589522.X proposes a sequencing batch fertilizer water acidification treatment and storage device, which can realize the automatic control of the manure water acidification process, but the device requires a stirring process during operation, which increases the operating cost of the acidification process.

[0006] Application numbers 201811598148.4, 201911141967.0, 201911141976.X, 201911141966.6 and 201911142232.X proposed methods for acidifying septic water with alum, superphosphate and sulfuric acid. Their processes all adopted sequencing batch acidification, and the acidification process required additional stirring of the septic water, which increased the operating costs of the acidification process. Summary of the Invention

[0007] The present invention provides a multi-stage pipeline continuous manure water acidification method and system, which aims to solve the problems that traditional manure water acidification requires the construction of an acidification tank, the relocation of a manure water acidification tank consumes a lot of resources and is difficult to build, and the traditional manure water acidification process consumes a lot of electricity resources.

[0008] In view of the problems existing in the prior art, the present invention provides a multi-stage pipeline continuous sewage acidification method, comprising:

[0009] Transporting septic water to be acidified into the pipeline;

[0010] Acquire first pH information, first flow rate information, first liquid level depth information, and first solid content information of the sewage in a first area of ​​the pipeline;

[0011] Obtaining a first acid addition amount according to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information;

[0012] adding acid to the first region according to the first acid addition amount;

[0013] …

[0014] Obtaining nth pH information, nth flow rate information, nth liquid level depth information, and nth solid content information of the sewage in the nth region of the pipeline;

[0015] Determining that the nth pH information is greater than a preset pH value, and obtaining an nth acid addition amount according to the nth pH information, the nth flow rate information, the nth liquid level depth information, and the nth solid content information;

[0016] adding acid to the nth region according to the nth acid addition amount;

[0017] Determining that the nth pH information is less than the preset pH value, stopping adding acid to the nth region;

[0018] The acidified fertilizer water is discharged into the storage tank.

[0019] According to a multi-stage pipeline continuous manure acidification method provided by the present invention, obtaining a first acid addition amount according to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information includes:

[0020] Obtaining a first theoretical acid addition amount according to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information;

[0021] Obtaining a first acid addition amount according to the first theoretical acid addition amount and a first preset acid addition ratio;

[0022] Wherein, the first preset acid addition ratio is less than 1.

[0023] According to a multi-stage pipeline continuous manure acidification method provided by the present invention, obtaining the nth acid addition amount according to the nth pH information, the nth flow rate information, the nth liquid level depth information, and the nth solid content information includes:

[0024] Obtaining an nth theoretical acid addition amount according to the nth pH information, the nth flow rate information, the nth liquid level depth information, and the nth solid content information;

[0025] Obtaining an nth acid addition amount according to the nth theoretical acid addition amount and a second preset acid addition ratio;

[0026] Wherein, the second preset acid addition ratio is greater than 1.

[0027] According to a multi-stage pipeline continuous manure acidification method provided by the present invention, obtaining a first theoretical acid addition amount according to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information includes:

[0028] According to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information, a first theoretical acid addition amount is obtained based on the following formula:

[0029] V1=V2*S*a*(b / 1%)*c;

[0030] Among them, V1 is the theoretical acid addition rate, V2 is the first flow rate information, S is the liquid surface cross-sectional area, a is the conversion coefficient between the amount of acid added and the solid content of manure water at 1% when the pH value is reduced by 1, b is the first solid content information, and c is the absolute value of the difference between the preset pH value and the first pH information.

[0031] The present invention also provides a multi-section pipeline continuous sewage acidification system, comprising:

[0032] an acidizing pipeline, wherein the acidizing pipeline has an acidizing cavity;

[0033] an acidification structure comprising an acidifier storage tank and a plurality of acid adding members, each of the acid adding members being sequentially spaced apart along the axial direction of the acidification pipeline, each of the acid adding members being in communication with the acidifier storage tank and the acidification chamber, and being used for adding the acidifier into the acidification chamber;

[0034] A detection structure is provided in the acidification chamber and is corresponding to each of the acid adding members, each of the detection structures is used to detect the pH value, flow rate, liquid level and solid content of the manure in the acidification chamber;

[0035] The controller is electrically connected to the detection structure and each of the acid adding components, and is used to control the corresponding acid adding component to add acid according to the detection information of each of the detection structures.

[0036] According to a multi-section pipeline continuous sewage acidification system provided by the present invention, the acidification structure includes an acidifier delivery pipe connected to the acidifier storage tank, and the acidifier delivery pipe extends along the axial direction of the acidification pipeline;

[0037] Each of the acid adding components comprises an acid adding pump which is sequentially arranged on the acidifying agent delivery pipe, and an acidifying agent spraying head which is arranged in the acidifying chamber and communicated with the acid adding pump.

[0038] According to a multi-section pipeline continuous sewage acidification system provided by the present invention, a plurality of fins are further provided in the acidification chamber, each of the fins is arranged in a spiral, and the length of each fin is greater than the radius of the acidification pipeline.

[0039] According to a multi-stage pipeline continuous manure acidification system provided by the present invention, the acidifier storage tank has a accommodating cavity, and is provided with a solid acidifier feed port and a liquid acidifier feed port connected to the accommodating cavity. The liquid acidifier feed port is used to input liquid acidifier or water.

[0040] According to the multi-section pipeline continuous sewage acidification system provided by the present invention, a plurality of ultrasonic vibration rods are further provided in the accommodating cavity, and the ultrasonic vibration rods are sequentially spaced apart along the axial direction of the acidifier storage tank.

[0041] According to a multi-section pipeline continuous manure acidification system provided by the present invention, the acidifier storage tank further includes a negative pressure vacuum pump and a negative pressure pipeline connected to the negative pressure vacuum pump, and the negative pressure pipeline is connected to the accommodating cavity.

[0042] The multi-stage pipeline continuous manure water acidification method provided by the present invention adopts a continuous manure water acidification process and only requires a small space to complete the manure water acidification process. Compared with the sequencing batch manure water acidification process in the prior art that requires the construction of an acidification tank to carry out the acidification process, the multi-stage pipeline continuous manure water acidification method provided by the present invention only requires the use of the sewage pipeline between the manure water outlet of the breeding house or the biogas project and the manure water storage tank to transform the acidification pipeline to complete the acidification process. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 This is a schematic flow chart of the multi-stage pipeline continuous sewage acidification method provided by the present invention;

[0045] Figure 2 This is a schematic structural diagram of the multi-section pipeline continuous sewage acidification system provided by the present invention;

[0046] Figure 3 yes Figure 2 Schematic diagram of the three-dimensional structure of the intermediate acidifier storage tank;

[0047] Figure 4 yes Figure 3 A cross-sectional structural diagram of ;

[0048] Figure 5 yes Figure 2 Schematic diagram of the arrangement structure of the middle fins;

[0049] Reference numerals:

[0050] Figure numerals: 1: multi-section pipeline continuous sewage acidification system; 2: acidification pipeline; 3: acidification structure; 4: detection structure; 5: controller; 6: acidification chamber; 7: fin; 8: anti-seepage layer; 9: acidifier storage tank; 10: acid adding part; 11: acidifier delivery pipe; 12: acidifier spray head; 13: accommodating chamber; 14: solid acidifier feed port; 15: liquid acidifier feed port; 16: ultrasonic vibrating rod; 17: negative pressure vacuum pump; 18: negative pressure pipeline; 19: liquid level meter; 20: acid adding pump. DETAILED DESCRIPTION

[0051] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0052] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0053] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0054] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0055] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0056] The following combination Figure 1-Figure 5 The present invention describes a method and system for continuous sewage acidification using a multi-section pipeline.

[0057] Existing manure acidification devices or processes are all sequencing batch acidification processes, which require a certain area of ​​supporting facilities to build acidification tanks to acidify the manure. For operating farms, it is difficult to spare construction land for the construction of manure acidification tanks. In view of this, the present invention provides a multi-stage pipeline continuous manure acidification method, comprising:

[0058] S100, transporting septic water to be acidified into the pipeline;

[0059] S110, obtaining first pH information, first flow rate information, first liquid level depth information, and first solid content information of the sewage in a first area of ​​the pipeline;

[0060] S120: Obtain a first acid addition amount based on the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information;

[0061] S130, adding acid to the first region according to the first acid addition amount;

[0062] …

[0063] Sn00, obtaining the nth pH information, nth flow rate information, nth liquid level depth information and nth solid content information of the sewage in the nth area of ​​the pipeline;

[0064] Sn10. Determine that the nth pH information is greater than a preset pH value, and obtain an nth acid addition amount according to the nth pH information, the nth flow rate information, the nth liquid level depth information, and the nth solid content information;

[0065] Sn20, adding acid into the pipeline according to the nth acid addition amount;

[0066] Sn30, determining that the nth pH information is less than the preset pH value, and stopping adding acid to the nth region;

[0067] S(n+1)00. Discharge the acidified fertilizer water into the storage tank.

[0068] It should be noted that the pipeline can be formed by renovating the sewage pipeline between the manure and water outlet of the breeding house or biogas project and the manure and water storage tank. If the manure is collected by scraping, the pipeline can be renovated from the pipeline between the solid-liquid separation facility and the manure and water storage tank; if manual manure removal is used, the pipeline can be renovated from the pipeline installed between the manure and water collection main pipeline in the breeding area and the manure and water storage tank.

[0069] The pipeline is generally arranged to be long, with manure flowing in from one end and out from the other end. The technical solution provided by the present invention adopts a continuous manure water acidification process to acidify the manure water in each area of ​​the pipeline. First, first pH information, first flow rate information, first liquid level information, and first solid content information of the manure water are obtained in the first area, a first acid addition amount is calculated based on the above information, and acid is added to the first area to acidify the manure water in the area; when the manure water flows through the second area, second pH information, second flow rate information, second liquid level information, and second solid content information of the manure water are obtained in the second area, a second acid addition amount is calculated based on the above information, and acid is added to the second area to acidify the manure water in the second area; assuming that the pipeline is provided with n acid addition nodes, when the manure water flows through the nth area, if the pH value of the manure water at this time is less than the preset pH value, no acid addition is required. If the pH value of the manure water is greater than the preset pH value, the nth acid addition amount still needs to be calculated and acid addition is performed; the acid addition can be operated by an acid addition pump, which is not limited by the present invention.

[0070] It should be noted that acid addition is only carried out when the flow rate of the manure water is detected. The manure water flows into the pipeline continuously within a certain period of time. The pH value detection can be carried out after a preset time interval. When the preset time is set short enough, this detection can also be considered to be real-time. After the pH value is obtained, the amount of acid added needs to be calculated. If the real-time pH value is greater than the preset pH value, acid needs to be added according to the calculated amount of acid added. If the real-time pH value is less than the preset pH value, the area needs to stop adding acid. In this way, a continuous fertilizer water acidification process is formed, so that after multiple processes of acid addition and acidification, qualified acidified fertilizer water is finally discharged.

[0071] The multi-stage pipeline continuous manure water acidification method provided by the present invention adopts a continuous manure water acidification process and only requires a small space to complete the manure water acidification process. Compared with the sequencing batch manure water acidification process in the prior art that requires the construction of an acidification tank to carry out the acidification process, the multi-stage pipeline continuous manure water acidification method provided by the present invention only requires the sewage pipe between the manure water outlet of the breeding house or the biogas project and the manure water storage tank to be converted into an acidification pipe to complete the acidification process.

[0072] Specifically, S120, obtaining a first acid addition amount according to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information includes:

[0073] S121. Obtain a first theoretical acid addition amount according to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information;

[0074] S122, obtaining a first acid addition amount according to the first theoretical acid addition amount and a first preset acid addition ratio;

[0075] Wherein, the first preset acid addition ratio is less than 1.

[0076] In the technical solution provided by the present invention, the manure water needs to undergo multiple acidification processes. Therefore, the theoretical acid addition amount is first calculated based on the manure water parameters of the current area. The theoretical acid addition amount is then multiplied by a first preset acid addition ratio to obtain the actual first acid addition amount. The first preset acid addition ratio can be set between 0.5 and 1. This ensures the acidification effect and ensures that the manure water pH does not fall below the preset pH value. It should be noted that, assuming there are n acid addition areas, in the first to the (n-1)th acid addition areas, the theoretical acid addition amount needs to be multiplied by the first preset acid addition ratio to obtain the actual acid addition amount.

[0077] Further, Sn10, obtaining the nth acid addition amount according to the nth pH information, the nth flow rate information, the nth liquid level depth information, and the nth solid content information includes:

[0078] Sn11. Obtaining an nth theoretical acid addition amount according to the nth pH information, the nth flow rate information, the nth liquid level depth information, and the nth solid content information;

[0079] Sn12. Obtaining an nth acid addition amount according to the nth theoretical acid addition amount and the second preset acid addition ratio;

[0080] Wherein, the second preset acid addition ratio is greater than 1.

[0081] Because the nth region is near the end of the pipe, if the pH of the sewage is still below the preset pH value at this point, the amount of acid added needs to be increased to ensure that the sewage flowing out of the pipe meets the acidification requirements. Therefore, in the technical solution provided by the present invention, the second preset acid addition ratio can be selected to be a value between 1 and 1.5 to ensure the final sewage acidification effect.

[0082] Specifically, S121, the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information, obtaining the first theoretical acid addition amount includes:

[0083] According to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information, a first acid addition amount is obtained based on the following formula:

[0084] V1=V2*S*a*(b / 1%)*c;

[0085] Among them, V1 is the theoretical acid addition rate (L / min), V2 is the first flow rate information (m / s), S is the liquid surface cross-sectional area (m 2 ), a is the conversion coefficient (L / m 3 ), b is the first solid content information (%), and c is the absolute value of the difference between the preset pH value and the first pH information.

[0086] It should be noted that the cross-sectional area of ​​the liquid surface can be calculated based on the liquid surface height and the pipe parameters (height, width or radius); the three coefficients a, b, and c form a system. The change in the pH value of the manure is most closely related to the solid content of the manure, and is linear. Under normal circumstances, the constant a can be set to 0.05. The other a value can be determined by taking the average of multiple tests on the farm. The experimental calculation method is: when the solid content of the manure in the farm is b = 1%, if the pH of the tested manure changes from 8.0 to 6.0, 1‰ of the manure volume needs to be added. Therefore, when the c value is |6.0-8.0| = 2.0, the conversion coefficient a = 1‰ / (b / 1%) / c = 1‰ / 1% / 2.0 = 0.05.

[0087] Based on the above-mentioned multi-stage pipeline continuous manure acidification method, the present invention also provides a multi-stage pipeline continuous manure acidification system 1, comprising: an acidification pipeline 2, the acidification pipeline 2 having an acidification chamber 6 therein, and the acidification pipeline 2 can be formed by modifying the sewage pipeline between the manure water outlet of the breeding house or biogas project and the manure water storage tank. It should be noted that if manure is collected by scraping, the acidification pipeline 2 is formed by modifying the pipeline between the solid-liquid separation facility and the manure water storage tank; if manual manure cleaning is used, the acidification pipeline 2 is formed by modifying the pipeline installed between the manure water collection main pipeline in the breeding area and the manure water storage tank;

[0088] The acidification structure 3 includes an acidifier storage tank 9 and multiple acid adding components 10. The acid adding components 10 are arranged in sequence along the axial direction of the acidification pipeline 2. Each acid adding component 10 is connected to the acidifier storage tank 9 and the acidification chamber 6 and is used to add acidifier into the acidification chamber 6. The detection structure 4 is provided in the acidification chamber 6 and is corresponding to each acid adding component 10. Each detection structure 4 is used to detect the pH value, flow rate, liquid level and solid content of the manure in the acidification chamber 6. The controller 5 is electrically connected to the detection structure 4 and each acid adding component 10 and is used to control the corresponding acid adding component 10 to add acid according to the detection information of each detection structure 4.

[0089] It should be noted that in actual use, the real-time pH value, flow rate, liquid level, and solid content of each area of ​​the manure are obtained through the multiple detection structures 4 provided, and the acid addition amount of each corresponding acid addition member 10 is calculated, and then the manure in the area is acidified by the acid addition member 10. Generally, the actual acid addition amount will be lower than the actual theoretical acid addition amount, so the pH value of the manure is adjusted by multiple acid additions; when the manure flows through the detection structure 4 of a region, the real-time parameters of the manure are obtained through the detection structure 4, the acid addition amount is calculated, and the manure in the region is acidified by the acid addition member 10; when the manure passes through the last detection structure 4 provided (near the tail of the acidification pipe 2), the real-time pH value of the manure is obtained through the detection structure 4. If the pH value of the manure is less than the preset pH value, the acid addition is stopped. If it is greater than the preset pH value, the acid addition amount is determined again according to the real-time parameters, and the manure in the region is acidified by the acid addition member 10. However, the acid addition amount of the last acid addition member 10 needs to be greater than the theoretical acid addition amount to ensure that the pH value of the outflowing manure is less than or equal to the preset pH value. It should be noted that the entire system will start working only when the flow rate of the manure is detected. Therefore, the manure flows continuously into the acidification pipe 2 within a certain period of time, and the detection structure 4 and the acid adding component 10 also work continuously. The detection structure 4 in each area will detect the parameters of the manure once at intervals. When the time is short enough, this detection can be considered to be real-time, and then the amount of acid added is calculated. If the pH value is greater than the preset pH value, the acid adding component 10 needs to add acid according to the calculated amount of acid added. If the pH value is less than the preset pH value, the acid adding component 10 needs to stop adding acid.

[0090] Specifically, the acidification structure 3 includes an acidifier delivery pipe 11 connected to the acidifier storage tank 9 and extending axially along the acidification pipeline 2. Each acid addition unit 10 includes an acid addition pump 20, which is sequentially mounted on the acidifier delivery pipe 11 and is used to add acid to the acidification chamber 6. To ensure uniform acid addition, the acid addition unit 10 also includes an acidifier spray head 12, which is located within the acidification chamber 6 and connected to the acid addition pump 20. The present invention utilizes a multi-stage continuous acidification process, requiring only a few acid addition units 10 to complete the acidification process. This significantly reduces costs compared to conventional methods of acidifying manure and urine in aquaculture sheds, which require at least ten acid addition spray devices per shed.

[0091] It should be noted that the volume of the acidifier storage tank 9 is determined by the scale of breeding. Generally, the acid storage capacity can be set to 7 to 30 days. For a pig farm with 1,000 pigs and using dry manure cleaning to collect manure, the acidifier (sulfuric acid) is diluted by half and the dosage is 0.2% of the manure volume. The daily manure and flushing water volume is about 5m3. 3 , the daily consumption of acidifier is 10L, the acid storage tank capacity is recommended to be set at 100L~150L, ​​1000 (length) * 400 (diameter) mm; the spacing between the acid adding parts 10 is not less than 50cm; the spacing between the detection structures 4 is not less than 50cm; in the technical solution provided by the present invention, the acidifier is added at least twice during the multi-stage acidification process (that is, two acid adding parts 10 are set), but generally not more than 5 times; the shortest acidification pipeline 2 is 1m, generally not more than 100m.

[0092] Furthermore, a plurality of fins 7 are provided in the acidification chamber 6, and each fin 7 is arranged in a spiral manner to improve the stirring effect. The length of each fin 7 is greater than the radius of the acidification pipe 2. Existing manure acidification devices or processes all require stirring of the manure acidification process. As for the stirring device, a high-power power system is required to ensure its stable operation. The present invention utilizes the fluidity of manure by embedding spiral fins 7 in the acidification pipe 2 to achieve the mixing process of manure and acidifier, without the need for additional power to improve the mixing effect of manure and acidifier. From the perspective of a single fin 7, the fin 7 can slow down the flow rate of manure, disturb the manure and acidifier so that it is better mixed with the acidifier. From the perspective of the overall arrangement order, the fin 7 can increase the length and flow rate of the manure flow route, further improving the mixing effect of the acidifier and manure. In addition, the inner wall of the acidification pipe 2 is also provided with an anti-seepage layer 8 to ensure the acidification effect and acidification quality and prevent leakage.

[0093] Specifically, the acidulant storage tank 9 has a receiving chamber 13, and is provided with a solid acidulant feed port 14 and a liquid acidulant feed port 15 connected to the receiving chamber 13. The liquid acidulant feed port 15 is used to input liquid acidulant or water, making it convenient for staff to select the appropriate acidulant. The acidulant generally needs to be mixed with water, so the acidulant storage tank 9 also includes a negative pressure vacuum pump 17 and a negative pressure pipe 18 connected to the negative pressure vacuum pump 17. The negative pressure pipe 18 is connected to the receiving chamber 13, and the negative pressure vacuum pump 17 draws water and mixes the acidulant. To further improve the mixing effect, a plurality of ultrasonic vibrating rods 16 are also provided in the receiving chamber 13. Each ultrasonic vibrating rod 16 is arranged in sequence along the axial direction of the acidulant storage tank 9, and assists in mixing the acidulant and water through ultrasonic vibration. In addition, to facilitate real-time acquisition of the acid-water capacity in the receiving chamber 13, a liquid level meter 19 is also provided in the receiving chamber 13.

[0094] It should be noted that if the acidifier is a solid acidifier, the liquid acidifier feed port 15 is first connected to the water source through a pipe, and the negative pressure vacuum pump 17 is started to suck an appropriate amount of water into the accommodating chamber 13 in the form of negative pressure. After completion, the negative pressure vacuum pump 17 is turned off, and then the solid acidifier is added through the solid acidifier feed port 14. After the addition is completed, the solid acidifier feed port 14 is closed, and the ultrasonic vibration rod 16 is started for mixing for not less than 15 minutes. After mixing, the ultrasonic vibration rod 16 is turned off to complete the solid acidifier pretreatment process;

[0095] If the acidulant is a liquid acidulant, first connect the liquid acidulant feed port 15 to a water source through a pipe, start the negative pressure vacuum pump 17, and suck an appropriate amount of water into the accommodating chamber 13 in the form of negative pressure. After completion, turn off the negative pressure vacuum pump 17, then connect the liquid acidulant feed port 15 to a liquid acidulant through a pipe, start the negative pressure vacuum pump 17, and suck an appropriate amount of liquid acidulant into the accommodating chamber 13 in the form of negative pressure. After completion, turn off the negative pressure vacuum pump 17, start the ultrasonic vibration rod to mix, and the time is not less than 15 minutes. After mixing, turn off the ultrasonic vibration rod to complete the liquid acidulant pretreatment process.

[0096] The present invention adds an acidifier to the acidifier storage tank 9 in a pretreatment process, and no longer uses concentrated acid for acidification. The acidification process reduces the carbonization process of concentrated acid (especially concentrated sulfuric acid) on organic matter in the sewage, reduces the impact of bubbles generated in the acidification process on the data, and makes the acidification data more accurate. At the same time, the emission of other secondary pollutant gases caused by the addition of acid is reduced.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A multi-stage pipeline continuous sewage acidification method, characterized in that: include: Transporting septic water to be acidified into the pipeline; Acquire first pH information, first flow rate information, first liquid level depth information, and first solid content information of the sewage in a first area of ​​the pipeline; Obtaining a first acid addition amount according to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information; adding acid to the first region according to the first acid addition amount; Similarly, in the nth region of the pipeline, the nth pH information, the nth flow rate information, the nth liquid level depth information, and the nth solid content information of the sewage are obtained; Determining that the nth pH information is greater than a preset pH value, and obtaining an nth acid addition amount according to the nth pH information, the nth flow rate information, the nth liquid level depth information, and the nth solid content information; adding acid to the nth region according to the nth acid addition amount; Determining that the nth pH information is less than the preset pH value, stopping adding acid to the nth region; Discharge the acidified fertilizer water into the storage tank; Obtaining a first acid addition amount according to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information includes: Obtaining a first theoretical acid addition amount according to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information; Obtaining a first acid addition amount according to the first theoretical acid addition amount and a first preset acid addition ratio; Wherein, the first preset acid addition ratio is less than 1; Obtaining the nth acid addition amount according to the nth pH information, the nth flow rate information, the nth liquid level depth information, and the nth solid content information includes: Obtaining an nth theoretical acid addition amount according to the nth pH information, the nth flow rate information, the nth liquid level depth information, and the nth solid content information; Obtaining an nth acid addition amount according to the nth theoretical acid addition amount and a second preset acid addition ratio; Wherein, the second preset acid addition ratio is greater than 1.

2. The multi-stage pipeline continuous sewage acidification method according to claim 1, characterized in that: Obtaining a first theoretical acid addition amount according to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information includes: According to the first pH information, the first flow rate information, the first liquid level depth information, and the first solid content information, a first theoretical acid addition amount is obtained based on the following formula: V1= V2*S*a*(b / 1%)*c ; Wherein, V1 is the theoretical acid addition rate, V2 is the first flow rate information, S is the liquid surface cross-sectional area, a is the conversion coefficient between the amount of acid added and the solid content of manure water at 1% when the pH value is reduced by 1, b is the first solid content information, and c is the absolute value of the difference between the preset pH value and the first pH information.

3. The multi-stage pipeline continuous sewage acidification method according to claim 1, characterized in that: The multi-stage pipeline continuous sewage acidification system is used to implement the multi-stage pipeline continuous sewage acidification method, and the multi-stage pipeline continuous sewage acidification system includes: an acidizing pipeline, wherein the acidizing pipeline has an acidizing cavity; an acidification structure comprising an acidifier storage tank and a plurality of acid adding members, each of the acid adding members being sequentially spaced apart along the axial direction of the acidification pipeline, each of the acid adding members being in communication with the acidifier storage tank and the acidification chamber, and being used for adding the acidifier into the acidification chamber; A detection structure is provided in the acidification chamber and is corresponding to each of the acid adding members, each of the detection structures is used to detect the pH value, flow rate, liquid level and solid content of the manure in the acidification chamber; The controller is electrically connected to the detection structure and each of the acid adding components, and is used to control the corresponding acid adding component to add acid according to the detection information of each of the detection structures.

4. The multi-stage pipeline continuous sewage acidification method according to claim 3, characterized in that: The acidizing structure includes an acidizing agent delivery pipe connected to the acidizing agent storage tank, and the acidizing agent delivery pipe extends along the axial direction of the acidizing pipeline; Each of the acid adding components comprises an acid adding pump which is sequentially arranged on the acidifying agent delivery pipe, and an acidifying agent spraying head which is arranged in the acidifying chamber and communicated with the acid adding pump.

5. The multi-stage pipeline continuous sewage acidification method according to claim 4, characterized in that: A plurality of fins are further provided in the acidification chamber. The fins are arranged in a spiral manner, and the length of each fin is greater than the radius of the acidification pipe.

6. The multi-stage pipeline continuous sewage acidification method according to claim 3, characterized in that: The acidulant storage tank has a containing cavity. A solid acidulant feed port and a liquid acidulant feed port communicating with the containing cavity are provided on the acidulant storage tank. The liquid acidulant feed port is used to input liquid acidulant or water.

7. The multi-stage pipeline continuous sewage acidification method according to claim 6, characterized in that: A plurality of ultrasonic vibration rods are further provided in the accommodating cavity, and the ultrasonic vibration rods are sequentially spaced apart along the axial direction of the acidifier storage tank.

8. The multi-stage pipeline continuous sewage acidification method according to claim 6, characterized in that: The acidifier storage tank further includes a negative pressure vacuum pump and a negative pressure pipeline communicated with the negative pressure vacuum pump, and the negative pressure pipeline is communicated with the accommodating chamber.

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