CN-121974470-A - Biogas slurry pretreatment method and device based on pear tree leaf fertilizer and drip irrigation fertilizer

CN121974470ACN 121974470 ACN121974470 ACN 121974470ACN-121974470-A

Abstract

The invention relates to the technical field of biogas slurry treatment, in particular to a biogas slurry pretreatment device based on pear tree leaf fertilizer and drip irrigation fertilizer, which comprises a reaction tank, a functional tank arranged in the reaction tank, wherein a functional body is slidably arranged on the inner wall of the functional tank, a mixed allocation area is formed between the bottom of the functional body and the inner bottom of the functional tank, a functional channel penetrating to the bottom of the functional body is formed in the top of the functional body, an acid injection component for adding acid liquid into the mixed allocation area, a plurality of liquid inlet tanks are penetrated and formed on the outer wall of the functional tank in the mixed allocation area, the liquid inlet tanks are positioned below the liquid level of the reaction tank, the functional body seals the liquid inlet tanks in an initial state, the functional body moves upwards and opens the liquid inlet tanks in an acid adjustment state, the acid injection component moves downwards to seal the liquid inlet tanks, the mixed acid adjustment of biogas slurry can be effectively realized, the biogas slurry can be accurately monitored, and a PH sensor can be maintained on line.

Inventors

Kang Weiheng
WANG ZHIWEI
KANG LIRUI
YANG YANG
XIE SHOUJIANG
LIU HUAN
ZHAO DEPING
ZHAO XIWU

Assignees

濮阳市盛鑫达农业发展有限公司

Dates

Publication Date: 20260505
Application Date: 20260116

Claims (10)

1. Biogas slurry pretreatment device based on pear tree leaf fertilizer and drip irrigation fertilizer, which is characterized by comprising: A reaction tank (1), a functional tank (2) arranged in the reaction tank, wherein a functional body (3) is slidably arranged on the inner wall of the functional tank (2); a mixing and blending area is formed between the bottom of the functional body (3) and the bottom in the functional pool (2), and a functional channel (12) penetrating to the bottom of the functional body (3) is formed at the top of the functional body; an acid injection assembly for adding acid solution into the mixing and blending area; the outer wall of the functional pool (2) in the mixing and blending area is provided with a plurality of liquid inlet tanks (6) in a penetrating way, and the liquid inlet tanks (6) are positioned below the liquid level of the reaction pool (1); In an initial state, the functional body (3) seals a plurality of liquid inlets (6); Under the acid adjusting state, the functional body (3) moves upwards and opens the liquid inlet groove (6), the acid injection assembly works, the functional body (3) moves downwards to seal the liquid inlet groove (6), and in the continuous downward moving process, the mixed liquid is output upwards through the functional channel (12) and is transferred into the reaction tank (1), and mixing and pre-dilution are completed.
2. The biogas slurry pretreatment device based on pear tree leaf fertilizer and drip irrigation fertilizer according to claim 1 is characterized in that a functional cavity (14) is formed in the functional body (3), a liquid inlet (8) communicated with the interior of the reaction tank (1) is formed in the inner wall of the functional cavity (14), a liquid discharge groove (7) is formed in the inner wall of the functional tank (2) above the liquid inlet groove (6) in a penetrating manner, the liquid discharge groove (7) and the liquid inlet groove (6) are arranged in a staggered manner, a PH sensor (15) is fixedly arranged at the inner top of the functional cavity (14), the liquid discharge groove (7) is located above the liquid level of the reaction tank (1), and a liquid discharge port (9) is formed in the inner cavity wall at the lowest position of the functional cavity (14) in a penetrating manner; in the working state, when the functional body (3) moves downwards to a preset position, the liquid inlet (8) is in butt joint with the liquid inlet groove (6), the functional cavity (14) receives the mixed liquid to be detected from the reaction tank (1), and the glass electrode of the PH sensor (15) is positioned in the mixed liquid; in a stop-measurement state, when the functional body (3) moves upwards to a preset position, the liquid outlet (9) is in butt joint with the liquid outlet groove (7), and the measured mixed liquid is released back into the reaction tank (1); a monitoring assembly for monitoring the occurrence of drift or misalignment of the readings of the PH sensor (15).
3. The biogas slurry pretreatment device based on pear tree leaf fertilizer and drip irrigation fertilizer according to claim 2, wherein the monitoring assembly comprises a second liquid supply pipeline (19) connected with an external buffer pump source, the second liquid supply pipeline (19) penetrates into the functional cavity (14) from the top of the functional body (3), when the functional body (3) moves upwards to the highest position in a monitoring state, the liquid discharge port (9) is sealed by the inner wall of the functional pool (2), the pump source works, standard buffer is pumped into the functional cavity (14), and if the PH sensor (15) reads a correct value slowly or reads drift, the PH sensor (15) can be firstly determined to be failed; a cleaning assembly for rinsing the glass electrode of a PH sensor (15).
4. The biogas slurry pretreatment device based on pear tree leaf fertilizer and drip irrigation fertilizer according to claim 3, wherein the cleaning assembly comprises an annular pipeline (16) surrounding the periphery of the glass electrode, a plurality of spray holes facing the outer wall of the glass electrode are formed in the annular pipeline (16), a first liquid supply pipeline (17) is fixedly installed in the functional cavity (14), one end of the first liquid supply pipeline (17) is cut with the periphery of the annular pipeline (16) and fixedly communicated with the periphery, and the other end of the first liquid supply pipeline (17) penetrates through the top of the functional body (3) to be associated with an external deionized water pump source and a chemical cleaning liquid pump source.
5. The biogas slurry pretreatment device based on pear tree fertilizer and drip irrigation fertilizer according to claim 4, wherein the functional channel (12) comprises a necking section and a cylindrical section, the necking section gradually narrows from bottom to top, the cylindrical section and the necking section are in smooth transition, the necking section is in a frustum shape, the top of the functional body (3) is in a truncated cone shape, a targeting sputtering disk (13) is fixedly arranged at the top of the functional body (3) above the cylindrical section through a supporting rod, the lower part of the targeting sputtering disk (13) is in a hollowed-out shape, the targeting sputtering disk (13) is in an arch-shaped design, and a water diversion groove is formed in the peripheral outer edge.
6. The biogas slurry pretreatment device based on pear tree leaf fertilizer and drip irrigation fertilizer according to claim 5, wherein a water breaking disc (18) is fixedly arranged at the lower opening of the necking section, the water breaking disc (18) is in a grid design, and the cross beam of the water breaking disc (18) and the lower part of the stile are in a sharp water breaking design.
7. The biogas slurry pretreatment device based on pear tree leaf fertilizer and drip irrigation fertilizer according to claim 5, wherein the acid injection assembly comprises a nozzle opening (11) arranged on the functional pond (2), the nozzle opening (11) is positioned below the liquid inlet groove (6), and an included angle is formed between the nozzle opening (11) and the central axis of the functional pond (2), and the included angle is in the range of fifteen degrees to thirty degrees.
8. The biogas slurry pretreatment device based on pear tree leaf fertilizer and drip irrigation fertilizer according to any one of claims 1-7, wherein an assembly plate (4) is fixedly arranged at the top of the reaction tank (1), a device box (5) is arranged on the assembly plate (4), a cylinder assembly is fixedly arranged on the device box (5), and the output end of the cylinder assembly is in transmission connection with the top of the functional body (3).
9. The biogas slurry pretreatment method based on the pear tree leaf fertilizer and the drip irrigation fertilizer comprises the biogas slurry pretreatment device based on the pear tree leaf fertilizer and the drip irrigation fertilizer, and further comprises a stirring structure in a reaction tank (1), and is characterized by further comprising the following steps: S1, primary mixing, namely starting a stirring structure in a reaction tank (1), driving a functional body (3) to move upwards and enter an acid regulation state, and simultaneously throwing acid liquor into a mixing and blending area by utilizing an acid injection assembly, so that biogas slurry objects in the reaction tank (1) enter the mixing and blending area through a liquid inlet tank (6), and primary mixing and pre-diluting of the acid liquor are implemented by utilizing the height difference; s2, strong mixing, namely enabling the functional body (3) to move up and down in a reciprocating manner, so that biogas slurry objects in the reaction tank (1) enter a mixing and blending area and then are output into the reaction tank (1) through the functional channel (12) to form forced reflux, and meanwhile, forced mixing is completed; S3, PH value measurement, namely after mixing to a certain extent, utilizing the functional body (3) to downwards displace to a preset position, enabling the liquid inlet (8) to be in butt joint with the liquid inlet groove (6), enabling the functional cavity (14) to receive biogas slurry to be measured from the reaction tank (1), enabling the glass electrode of the PH sensor (15) to be positioned in the mixed liquid, and completing independent PH value measurement of a biogas slurry object; And S4, repeatedly adjusting the pH value, and repeating the steps S1 to S3 when the pH value does not reach the standard interval.
10. The biogas slurry pretreatment method based on the pear tree leaf fertilizer and the drip irrigation fertilizer according to claim 9, wherein in the step S3, the method further comprises the following steps: When a larger error occurs to the PH value and the deviation from the estimated result is too large, the functional body (3) is made to enter a monitoring state, when the functional body (3) is driven to move upwards to the highest position, the liquid outlet (9) is closed by the inner wall of the functional pool (2), a pump source works at the same time, standard buffer solution is pumped into the functional cavity (14), and if the PH sensor (15) reads the correct value slowly or reads the drift, the PH sensor (15) can be firstly determined to have faults, and further detection is carried out; And T2, in a cleaning mode, even after fine filtration is carried out on the biogas slurry, lipid or protein and the like remain in the biogas slurry, the gel layer outside the glass electrode is polluted, the precision is affected, and at the moment, a deionized water pump or a chemical cleaning liquid pump is driven to wash the outside of the glass electrode through an injection hole on the annular pipeline (16).

Description

Biogas slurry pretreatment method and device based on pear tree leaf fertilizer and drip irrigation fertilizer Technical Field The invention relates to the technical field of biogas slurry treatment, in particular to a biogas slurry pretreatment method and device based on pear tree leaf fertilizer and drip irrigation fertilizer. Background Along with the development of ecological agriculture and circular economy, biogas slurry is used as an organic liquid fertilizer rich in organic matters and nutrient elements such as nitrogen, phosphorus and potassium, the recycling utilization of the organic liquid fertilizer on economic crops such as pear trees is increasingly emphasized, the integration of water and fertilizer is realized through drip irrigation or leaf surface spraying, the important direction of improving the value of the biogas slurry and realizing precise fertilization is realized, however, the biogas slurry is required to be effectively pretreated before being directly applied, one of key links is the adjustment of pH value, the biogas slurry is in weak alkaline, and acid liquid is required to be added to adjust the pH value of the biogas slurry to the optimal range (such as pH 6.0-7.5) for absorbing nutrients of crops so as to avoid the alkalization of soil and promote the effectiveness of the nutrients such as phosphorus, iron and zinc. At present, in the pretreatment process of large-scale biogas slurry, the pH adjustment is usually carried out by directly injecting acid liquor (such as phosphoric acid, citric acid and the like) into a storage or blending tank, the method has obvious technical defects, the treatment effect is severely restricted, an instantaneous high-concentration reaction zone is easily formed near an addition point after the direct injection, the intense acid-base neutralization reaction in the zone can instantaneously release heat, the concentration product of calcium, magnesium, phosphate radical and other ions in the biogas slurry instantaneously exceeds the solubility product, thus a large amount of inorganic salt crystallization precipitation of calcium phosphate, magnesium phosphate and the like is caused, the precipitates not only cause nutrient loss, but also are more easily adhered to the tank wall, the pipeline and the inside of a pump valve, form a scale layer which is difficult to clean, and are the primary reasons for causing the blockage of a drip irrigation system. Disclosure of Invention The invention provides a biogas slurry pretreatment method and device based on pear tree leaf fertilizer and drip irrigation fertilizer, which can effectively realize mixed acid regulation of biogas slurry, can accurately monitor the biogas slurry, and can simultaneously maintain a PH sensor on line. In order to achieve the above object, the present invention provides the following technical solutions: Biogas slurry pretreatment device based on pear leaf fertilizer and drip irrigation fertilizer includes: The acid injection device comprises a reaction tank, a functional tank, an acid injection assembly, a plurality of liquid inlet tanks, an acid injection assembly, a functional body, an acid adjusting assembly and a functional body, wherein the functional tank is arranged in the reaction tank, the functional body is arranged on the inner wall of the functional tank in a sliding manner, a mixing and blending area is formed between the bottom of the functional body and the inner bottom of the functional tank, a functional channel penetrating through the bottom of the functional body is formed in the top of the functional body, the acid injection assembly is used for adding acid liquid into the mixing and blending area, the outer wall of the functional tank in the mixing and blending area is provided with the plurality of liquid inlet tanks in a penetrating manner, the liquid inlet tanks are positioned below the liquid level of the reaction tank, the functional body seals the plurality of liquid inlet tanks in an initial state, the functional body moves upwards and opens the liquid inlet tanks in an acid adjusting state, the functional body moves downwards to seal the liquid inlet tanks, and enables the mixed liquid to be output upwards through the functional channel and transferred into the reaction tank in a continuous downward moving process, so that mixing and pre-dilution are completed. Optionally, a functional cavity is formed in the functional body, a liquid inlet communicated with the interior of the reaction tank is formed in the inner wall of the functional cavity, a liquid discharge groove is formed in the inner wall of the functional tank above the liquid inlet in a penetrating manner, the liquid discharge groove and the liquid inlet groove are arranged in a staggered manner, a PH sensor is fixedly arranged at the inner top of the functional cavity, the liquid discharge groove is located above the liquid level of the reaction tank, a liquid outlet is formed in the in