Method for deodorizing biogas slurry fertilizer

Abstract

The invention relates to the technical field of biogas slurry fertilizer deodorization, in particular to a biogas slurry fertilizer deodorization method which comprises the following steps: step 1, strain culture; 2, standing and precipitating the biogas slurry; step 3, sediment cleaning; step 4, performing harmless treatment on the gas; step 5, odor detection; and step 6, discharging and filling. Deodorization, precipitation and sterilization treatment are completed in one set of equipment, the deodorization effect is improved through mutual cooperation of multiple different deodorization strains, pollution to the environment in the production process is reduced, and the transportation convenience of the biogas slurry fertilizer after filling is improved.

Description

Technical Field

[0001] The invention relates to the technical field of deodorization of biogas slurry fertilizer, in particular to a deodorization method of biogas slurry fertilizer. Background Art

[0002] Biogas slurry fertilizer is a liquid fertilizer obtained through anaerobic fermentation of biomass. It is mainly produced by microbial decomposition of organic matter such as animal and plant residues and feces. It contains rich nutrients such as nitrogen, phosphorus, potassium and various trace elements, and has a good promoting effect on plant growth and development. Due to the large amount of impurities in biogas slurry fertilizer, it affects subsequent production.

[0003] Therefore, it is necessary to filter the impurities in the biogas slurry through an anaerobic fermentation biogas slurry impurity removal device disclosed in the utility model patent with application number 201820782057.5 and a biogas slurry filter disclosed in the invention patent with application number 200910084985.X.

[0004] However, it was also found in the actual production process that due to the strong odor of biogas slurry fertilizer, it has a great impact on the surrounding air environment when used, and after packaging, the biogas slurry fertilizer is prone to continue fermenting to produce biogas due to the presence of internal microorganisms, causing packaging leakage, resulting in poor practicality. Therefore, a deodorization method for biogas slurry fertilizer is urgently needed to improve the above problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a method for deodorizing sludge fertilizer, which can complete deodorization, precipitation and sterilization treatment in a set of equipment, improve the deodorization effect through the mutual cooperation of multiple different deodorizing bacteria species, reduce the pollution of the production process to the environment, and improve the convenience of transportation after filling of the sludge fertilizer.

[0006] A method for deodorizing biogas slurry fertilizer of the present invention comprises the following steps:

[0007] Step 1: Bacteria culture:

[0008] According to the characteristics of the bacteria, a variety of different deodorizing bacteria are cultured separately in different culture environments;

[0009] Step 2: Let the biogas slurry settle:

[0010] Discharge the biogas slurry fertilizer into the deodorization equipment and leave it in the deodorization equipment for 5-7 days to allow most of the particles in the biogas slurry fertilizer to settle;

[0011] Step 3: Sediment cleaning:

[0012] Clean the sediment at the bottom of the deodorization equipment and discharge it centrally;

[0013] Step 4: Gas harmless treatment:

[0014] To render harmless the gas generated by biogas fertilizer during the standing and deodorization process;

[0015] Step 5: Odor detection:

[0016] Detect the odor in the exhaust gas to determine the deodorization effect of the biogas fertilizer;

[0017] Step 6: Discharge and fill:

[0018] The deodorized biogas fertilizer is sterilized to kill most of the microorganisms in the biogas fertilizer and then bottled.

[0019] Preferably, the bacteria in the bacterial culture include anaerobic bacteria, aerobic bacteria and photosynthetic bacteria; the deodorizing effect is improved by the cooperation of a variety of different bacteria.

[0020] Preferably, in the gas harmless treatment, the biogas produced by the biogas slurry fertilizer is centrally burned to reduce pollution to the surrounding environment, and the heat generated by the combustion of the biogas is recovered and reused.

[0021] Preferably, during the sediment cleaning, the discharged sediment is dried by the heat generated by the combustion of biogas, and the dried sediment is mixed into dry organic fertilizer for use.

[0022] Preferably, during the discharge and filling, the biogas fertilizer in the discharge process is sterilized at high temperature, cooled to restore to normal temperature, and then filled to reduce the generation of biogas after filling.

[0023] Preferably, the deodorizing device comprises a storage mechanism, a circulating spraying mechanism and an atomizing mechanism, and the circulating spraying mechanism and the atomizing mechanism are both installed in the storage mechanism.

[0024] The storage mechanism stores the biogas slurry fertilizer, the circulating spraying mechanism circulates and sprays the biogas slurry fertilizer, and the atomizing mechanism atomizes the bacterial strains; the biogas slurry fertilizer is discharged into the storage mechanism for sedimentation, and then the biogas slurry fertilizer is circulated and sprayed by the circulating spraying mechanism, and at the same time, the bacterial strains are sprayed into the storage mechanism by the atomizing mechanism, and the circulated and sprayed biogas slurry fertilizer is deodorized, thereby improving the practicability of the deodorizing equipment.

[0025] Preferably, the storage mechanism comprises a storage tank, a feed valve, a heating pipe, a cooling pipe, a feed valve, an exhaust pipe, an odor sensor, a baffle and a sedimentation mechanism, the feed valve and the heating pipe are both installed on the storage tank, the exhaust pipe is installed on the top of the storage tank, the odor sensor and the baffle are both installed in the exhaust pipe, the cooling pipe is installed on the heating pipe, the feed valve is installed on the cooling pipe, and the sedimentation mechanism is installed at the bottom of the storage tank; the biogas slurry fertilizer is discharged into the storage tank through the feed valve, the biogas slurry fertilizer is allowed to settle in the storage tank, and then the sediment is discharged through the sedimentation mechanism, and then the biogas slurry fertilizer in the storage tank is discharged. The biogas fertilizer is deodorized, and the gas in the storage tank is discharged through the exhaust pipe. In the process of exhausting the exhaust pipe, the gas discharged from the exhaust pipe is dehumidified through the baffle, and the smell of the gas discharged from the exhaust pipe is detected by the odor sensor. After the biogas fertilizer is deodorized, the biogas fertilizer in the storage tank is discharged into the heating pipe, and the biogas fertilizer is sterilized at high temperature through the heating pipe, and then the sterilized biogas fertilizer is discharged into the cooling pipe, and the cooling pipe cools the biogas fertilizer, and then the cooled biogas fertilizer is discharged through the feed valve, thereby improving the practicability of the deodorization equipment.

[0026] Preferably, the sedimentation mechanism includes two groups of sealing plates, a first motor, a drain pipe and a drain valve, one group of sealing plates is fixedly installed at the bottom of the storage tank, the other group of sealing plates is rotatably installed at the bottom end of one group of sealing plates, and the bottom end of the other group of sealing plates is provided with a gear ring, both groups of sealing plates are provided with drain holes, the first motor is installed at the bottom of the storage tank, and the output shaft of the first motor extends to the interior of the storage tank, the top end of the output shaft of the first motor is provided with a gear, and the side end of the gear is meshed and connected with the gear ring on the other group of sealing plates; by turning on the first motor, the gear and the gear ring are transmitted to drive the other group of sealing plates to rotate, so that the two groups of sealing plates The drainage holes are misaligned, and the bottom of the storage tank is sealed by two sets of sealing plates. Then the sediment falls on the top of one set of sealing plates. After the sedimentation is completed, the first motor is turned on to drive the other set of sealing plates to rotate so that the drainage holes on the two sets of sealing plates are aligned, and then the sediment is scraped to the bottom of the storage tank through the circulating spraying mechanism. Then, the first motor is turned on again, and the other set of sealing plates is driven to rotate through the gear and the gear ring, so that the drainage holes on the two sets of sealing plates are misaligned, and the bottom of the storage tank is sealed by two sets of sealing plates. Then the drain valve is opened to discharge the sediment at the bottom of the storage tank, thereby improving the practicality of the deodorization equipment.

[0027] Preferably, the circulating spraying mechanism comprises a first circulating pipe, a scraper, a gear ring, a second motor, a gear, a second circulating pipe, a circulating pump, a liquid spray pipe and a plurality of atomizing nozzles, the first circulating pipe is rotatably mounted on the bottom end of the storage tank, and the bottom end of the first circulating pipe extends to the bottom of the storage tank, a plurality of liquid inlet holes are arranged on the top of the first circulating pipe, the scraper is mounted on the top of the first circulating pipe, and the bottom end of the scraper contacts the top end of a group of sealing plates, the gear ring is sleeved on the bottom of the first circulating pipe, the second motor is mounted on the drain pipe, the gear is mounted on the output shaft of the second motor, and the side end of the gear is meshedly connected with the side end of the gear ring, one end of the second circulating pipe is rotatably connected to the bottom end of the first circulating pipe, the other end of the second circulating pipe extends to the top of the storage tank, the circulating pump is mounted on the other end of the second circulating pipe The second motor is turned on, and the first circulation pipe is rotated through the meshing transmission of the gear and the gear ring, so that the scraper can scrape the sediment on the top of a group of sealing plates to the bottom of the storage tank. When deodorizing, the circulation pump is turned on to make the first circulation pipe discharge the biogas fertilizer in the storage tank into the second circulation pipe, and then the circulation pump is used to discharge the biogas fertilizer in the second circulation pipe into the spray pipe, and the biogas fertilizer is sprayed out through the multiple groups of atomizing nozzles. At the same time, because the multiple groups of atomizing nozzles are installed obliquely, the force of the biogas fertilizer sprayed out by the multiple groups of atomizing nozzles causes the spray pipe to rotate, so that the biogas fertilizer can be evenly sprayed, thereby improving the practicability of the deodorizing equipment.

[0028] Preferably, the atomization mechanism includes a mixing tube and a spiral blade, the mixing tube is installed on the storage tank, and one end of the mixing tube extends to the interior of the storage tank, an atomizing nozzle is provided on one end of the mixing tube, and multiple groups 24 are provided on the other end of the mixing tube; a plurality of different bacterial strains are discharged into the mixing tube through the multiple groups 24, the spiral blades guide the plurality of bacterial strains to mix the plurality of bacterial strains, and then the plurality of bacterial strains are sprayed into the storage tank through the atomizing nozzle on the mixing tube, so that the plurality of bacterial strains deodorize the biogas slurry fertilizer sprayed from the multiple groups of atomizing nozzles, thereby improving the practicability of the deodorization equipment.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. Use biological deodorization method and deodorization equipment to deodorize biogas slurry fertilizer to reduce pollution to the environment and reduce pollution to biogas slurry fertilizer;

[0031] 2. Improve production convenience by completing the precipitation, deodorization and sterilization of biogas slurry fertilizer in one set of equipment;

[0032] 3. Sterilize the discharged biogas slurry fertilizer to kill most of the microorganisms in the biogas slurry fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the deodorization process of the present invention;

[0034] Figure 2 It is a first isometric structural schematic diagram of the deodorizing device of the present invention;

[0035] Figure 3 It is a front view structural schematic diagram of the deodorizing device of the present invention;

[0036] Figure 4 It is a schematic diagram of the front cross-sectional structure of the deodorizing device of the present invention;

[0037] Figure 5 It is a partial cross-sectional structural schematic diagram of the deodorizing device of the present invention;

[0038] Figure 6 It is a second isometric structural schematic diagram of the deodorizing device of the present invention;

[0039] Figure 7 The present invention Figure 3 A schematic diagram of the enlarged structure of part A;

[0040] Figure 8 The present invention Figure 6 Schematic diagram of the enlarged structure of part B in FIG.

[0041] Markings in the attached figure: 1. storage tank; 2. feed valve; 3. heating pipe; 4. cooling pipe; 5. discharge valve; 6. exhaust pipe; 7. odor sensor; 8. baffle; 9. sealing plate; 10. first motor; 11. drain pipe; 12. drain valve; 13. first circulation pipe; 14. scraper; 15. gear ring; 16. second motor; 17. gear; 18. second circulation pipe; 19. circulation pump; 20. spray pipe; 21. atomizing nozzle; 22. mixing pipe; 23. spiral blade. DETAILED DESCRIPTION

[0042] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0043] Example

[0044] like Figure 1 As shown, the following steps are included:

[0045] Step 1: Bacteria culture:

[0046] According to the characteristics of the bacteria, a variety of different deodorizing bacteria are cultured separately in different culture environments;

[0047] Step 2: Let the biogas slurry settle:

[0048] Discharge the biogas slurry fertilizer into the deodorization equipment and leave it in the deodorization equipment for 5-7 days to allow most of the particles in the biogas slurry fertilizer to settle;

[0049] Step 3: Sediment cleaning:

[0050] Clean the sediment at the bottom of the deodorization equipment and discharge it centrally;

[0051] Step 4: Gas harmless treatment:

[0052] To render harmless the gas generated by biogas fertilizer during the standing and deodorization process;

[0053] Step 5: Odor detection:

[0054] Detect the odor in the exhaust gas to determine the deodorization effect of the biogas fertilizer;

[0055] Step 6: Discharge and fill:

[0056] The deodorized biogas fertilizer is sterilized to kill most of the microorganisms in the biogas fertilizer, reduce the biogas production by the biogas fertilizer, and then filled;

[0057] The bacterial species in the bacterial culture include anaerobic bacteria, aerobic bacteria and photosynthetic bacteria;

[0058] In the gas harmless treatment, the biogas produced by the biogas slurry fertilizer is centrally burned to reduce pollution to the surrounding environment, and the heat generated by the combustion of the biogas is recycled;

[0059] In the sediment cleaning, the discharged sediment is dried by the heat generated by the combustion of the biogas, and the dried sediment is mixed into dry organic fertilizer for use;

[0060] During the discharge and filling, the biogas slurry fertilizer in the discharge process is sterilized at high temperature, cooled to restore to normal temperature, and then filled to reduce the generation of biogas after filling.

[0061] like Figures 2 to 8 As shown, the deodorizing device includes a storage mechanism, a circulating spraying mechanism and an atomizing mechanism, and the circulating spraying mechanism and the atomizing mechanism are both installed in the storage mechanism.

[0062] The storage mechanism stores the biogas slurry fertilizer, the circulating spraying mechanism circulates and sprays the biogas slurry fertilizer, and the atomizing mechanism atomizes the bacterial strains;

[0063] The storage mechanism comprises a storage tank 1, a feed valve 2, a heating pipe 3, a cooling pipe 4, a feed valve 5, an exhaust pipe 6, an odor sensor 7, a baffle 8 and a sedimentation mechanism, wherein the feed valve 2 and the heating pipe 3 are both mounted on the storage tank 1, the exhaust pipe 6 is mounted on the top of the storage tank 1, the odor sensor 7 and the baffle 8 are both mounted in the exhaust pipe 6, the cooling pipe 4 is mounted on the heating pipe 3, the feed valve 5 is mounted on the cooling pipe 4, and the sedimentation mechanism is mounted at the bottom of the storage tank 1;

[0064] The sedimentation mechanism includes two groups of sealing plates 9, a first motor 10, a drain pipe 11 and a drain valve 12, one group of sealing plates 9 is fixedly installed at the bottom of the storage tank 1, and the other group of sealing plates 9 is rotatably installed at the bottom end of one group of sealing plates 9, and the bottom end of the other group of sealing plates 9 is provided with a gear ring, and both groups of sealing plates 9 are provided with drain holes, the first motor 10 is installed at the bottom of the storage tank 1, and the output shaft of the first motor 10 extends to the inside of the storage tank 1, and the top end of the output shaft of the first motor 10 is provided with a gear, and the side end of the gear is meshed and connected with the gear ring on the other group of sealing plates 9;

[0065] The circulating spraying mechanism comprises a first circulating pipe 13, a scraper 14, a gear ring 15, a second motor 16, a gear 17, a second circulating pipe 18, a circulating pump 19, a liquid spraying pipe 20 and a plurality of atomizing nozzles 21. The first circulating pipe 13 is rotatably mounted on the bottom end of the storage tank 1, and the bottom end of the first circulating pipe 13 extends to the bottom of the storage tank 1. The top of the first circulating pipe 13 is provided with a plurality of liquid inlet holes. The scraper 14 is mounted on the top of the first circulating pipe 13, and the bottom end of the scraper 14 contacts with the top end of a group of sealing plates 9. The gear ring 15 is sleeved on the bottom of the first circulating pipe 13. The second motor 16, a gear 17, a second circulating pipe 18, a circulating pump 19, a liquid spraying pipe 20 and a plurality of atomizing nozzles 21. The motor 16 is installed on the sewage pipe 11, the gear 17 is installed on the output shaft of the second motor 16, and the side end of the gear 17 is meshed and connected with the side end of the gear ring 15, one end of the second circulation pipe 18 is rotatably connected with the bottom end of the first circulation pipe 13, and the other end of the second circulation pipe 18 extends to the top of the storage tank 1, the circulation pump 19 is installed on the other end of the second circulation pipe 18, and the water suction port of the circulation pump 19 is communicated with the inside of the second circulation pipe 18, the spray pipe 20 is rotatably installed on the drainage port of the circulation pump 19, and multiple groups of atomizing nozzles 21 are all obliquely installed at the bottom end of the spray pipe 20;

[0066] The atomizing mechanism includes a mixing tube 22 and a spiral blade 23. The mixing tube 22 is installed on the storage tank 1, and one end of the mixing tube 22 extends to the interior of the storage tank 1. An atomizing nozzle is arranged on one end of the mixing tube 22, and a plurality of groups 24 are arranged on the other end of the mixing tube 22.

[0067] The operation process of the deodorization equipment is as follows: the biogas slurry fertilizer is discharged into the storage tank 1 through the feed valve 2, and the biogas slurry fertilizer is allowed to settle in the storage tank 1. Then, the first motor 10 is turned on, and the gear and the gear ring are used to drive the other set of sealing plates 9 to rotate, so that the drainage holes on the two sets of sealing plates 9 are misaligned, and the bottom of the storage tank 1 is sealed by the two sets of sealing plates 9. Then, the sediment falls on the top of one set of sealing plates 9. After the sedimentation is completed, the first motor 10 is turned on to drive the other set of sealing plates 9 to rotate, so that the drainage holes on the two sets of sealing plates 9 are aligned, and then the second motor 16 is turned on, and the gear 17 and the second motor 16 are driven to rotate. The gear ring 15 is meshed and driven to rotate the first circulation pipe 13, so that the scraper 14 can scrape the sediment on the top of a group of sealing plates 9 to the bottom of the storage tank 1. Then, the first motor 10 is turned on again, and the gear and the gear ring are driven to drive another group of sealing plates 9 to rotate, so that the drainage holes on the two groups of sealing plates 9 are misaligned, and the bottom of the storage tank 1 is sealed by the two groups of sealing plates 9. Then, the drainage valve 12 is opened to discharge the sediment at the bottom of the storage tank 1. Then, the circulation pump 19 is turned on to make the first circulation pipe 13 discharge the biogas slurry fertilizer in the storage tank 1 into the second circulation pipe 18, and then the circulation pump 19 is turned on to make the first circulation pipe 13 discharge the biogas slurry fertilizer in the storage tank 1 into the second circulation pipe 18. The ring pump 19 discharges the biogas fertilizer in the second circulation pipe 18 into the spray pipe 20, and sprays the biogas fertilizer through the multiple groups of atomizing nozzles 21. At the same time, since the multiple groups of atomizing nozzles 21 are installed obliquely, the force of spraying the biogas fertilizer through the multiple groups of atomizing nozzles 21 causes the spray pipe 20 to rotate, which is convenient for uniform spraying of the biogas fertilizer, and discharges a variety of different strains into the mixing pipe 22 through the multiple groups 24, so that the spiral blades 23 guide the multiple strains to mix the multiple strains, and then spray the multiple strains into the storage tank 1 through the atomizing nozzles on the mixing pipe 22, so that the multiple strains are sprayed on the multiple groups of atomizing nozzles. The biogas slurry fertilizer sprayed by 21 is deodorized, and the corresponding gas in the storage tank 1 is discharged through the exhaust pipe 6. In the process of exhausting the exhaust pipe 6, the gas discharged from the exhaust pipe 6 is dehumidified through the baffle 8, and the taste of the gas discharged from the exhaust pipe 6 is detected by the odor sensor 7. After the biogas slurry fertilizer is deodorized, the biogas slurry fertilizer in the storage tank 1 is discharged into the heating pipe 3, and the biogas slurry fertilizer is sterilized at high temperature through the heating pipe 3, and then the sterilized biogas slurry fertilizer is discharged into the cooling pipe 4, so that the cooling pipe 4 cools the biogas slurry fertilizer, and then the cooled biogas slurry fertilizer is discharged through the feed valve 5.

[0068] The main functions achieved by the present invention are: improving environmental protection, improving production convenience, and improving transportation and use safety;

[0069] 1. Improve environmental protection: Use biological deodorization method and deodorization equipment to deodorize biogas slurry fertilizer to reduce environmental pollution, while ensuring the quality of biogas slurry fertilizer and reducing the pollution of chemical substances to biogas slurry fertilizer;

[0070] 2. Improve production convenience: Improve production convenience by completing the precipitation, deodorization and sterilization of biogas slurry fertilizer in one set of equipment

[0071] 3. Improve the safety of transportation and use: sterilize the discharged biogas fertilizer to kill most of the microorganisms in the biogas fertilizer, reduce the production of biogas by the biogas fertilizer, and improve the stability of the biogas fertilizer during transportation and sales.

[0072] The installation, connection or setting methods of the deodorization method of the biogas slurry fertilizer of the present invention are all common mechanical methods, and can be implemented as long as the beneficial effects can be achieved; the heating tube 3, cooling tube 4, odor sensor 7, first motor 10, second motor 16 and circulating pump 19 of the deodorization method of the biogas slurry fertilizer of the present invention are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0073] 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 modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for deodorizing biogas slurry fertilizer, characterized in that: The following steps are involved: Step 1: Bacteria culture: According to the characteristics of the bacteria, a variety of different deodorizing bacteria are cultured separately in different culture environments; Step 2: Let the biogas slurry settle: Discharge the biogas slurry fertilizer into the deodorization equipment and leave it in the deodorization equipment for 5-7 days to allow most of the particles in the biogas slurry fertilizer to settle; Step 3: Sediment cleaning: Clean the sediment at the bottom of the deodorization equipment and discharge it centrally; Step 4: Gas harmless treatment: To render harmless the gas generated by biogas fertilizer during the standing and deodorization process; Step 5: Odor detection: Detect the odor in the exhaust gas to determine the deodorization effect of the biogas fertilizer; Step 6: Discharge and fill: The deodorized biogas fertilizer is sterilized to kill most of the microorganisms in the biogas fertilizer and then bottled.

2. A method for deodorizing biogas slurry fertilizer according to claim 1, characterized in that: The bacterial species in the bacterial species culture include anaerobic bacteria, aerobic bacteria and photosynthetic bacteria.

3. The method for deodorizing biogas slurry fertilizer according to claim 1, characterized in that: In the gas harmless treatment, the biogas produced by the biogas slurry fertilizer is centrally burned to reduce pollution to the surrounding environment, and the heat generated by the combustion of the biogas is recovered and used.

4. A method for deodorizing biogas slurry fertilizer as claimed in claim 3, characterized in that: In the sediment cleaning, the discharged sediment is dried by the heat generated by the combustion of the biogas, and the dried sediment is mixed into dry organic fertilizer for use.

5. The method for deodorizing biogas slurry fertilizer according to claim 1, characterized in that: During the discharge and filling, the biogas slurry fertilizer in the discharge process is sterilized at high temperature, cooled to restore to normal temperature, and then filled to reduce the generation of biogas after filling.

6. The method for deodorizing biogas slurry fertilizer according to claim 1, characterized in that: The deodorizing device comprises a storage mechanism, a circulating spraying mechanism and an atomizing mechanism, wherein the circulating spraying mechanism and the atomizing mechanism are both installed in the storage mechanism. The storage mechanism stores the biogas slurry fertilizer, the circulating spraying mechanism circulates and sprays the biogas slurry fertilizer, and the atomizing mechanism atomizes the bacterial strains.

7. A method for deodorizing biogas slurry fertilizer as claimed in claim 6, characterized in that: The storage mechanism comprises a storage tank (1), a feed valve (2), a heating pipe (3), a cooling pipe (4), a feed valve (5), an exhaust pipe (6), an odor sensor (7), a baffle (8) and a sedimentation mechanism, wherein the feed valve (2) and the heating pipe (3) are both mounted on the storage tank (1), the exhaust pipe (6) is mounted on the top of the storage tank (1), the odor sensor (7) and the baffle (8) are both mounted in the exhaust pipe (6), the cooling pipe (4) is mounted on the heating pipe (3), the feed valve (5) is mounted on the cooling pipe (4), and the sedimentation mechanism is mounted on the bottom of the storage tank (1).

8. A method for deodorizing biogas slurry fertilizer as claimed in claim 7, characterized in that: The sedimentation mechanism comprises two groups of sealing plates (9), a first motor (10), a sewage pipe (11) and a sewage valve (12), one group of sealing plates (9) is fixedly mounted on the bottom of the storage tank (1), the other group of sealing plates (9) is rotatably mounted on the bottom end of the one group of sealing plates (9), and a gear ring is arranged at the bottom end of the other group of sealing plates (9), both groups of sealing plates (9) are provided with sewage holes, the first motor (10) is mounted on the bottom of the storage tank (1), and the output shaft of the first motor (10) extends to the inside of the storage tank (1), the top end of the output shaft of the first motor (10) is provided with a gear, and the side end of the gear is meshed and connected with the gear ring on the other group of sealing plates (9).

9. The method for deodorizing biogas slurry fertilizer according to claim 7, characterized in that: The circulating spraying mechanism comprises a first circulating pipe (13), a scraper (14), a gear ring (15), a second motor (16), a gear (17), a second circulating pipe (18), a circulating pump (19), a liquid spraying pipe (20) and a plurality of atomizing nozzles (21), wherein the first circulating pipe (13) is rotatably mounted on the bottom end of the storage tank (1), and the bottom end of the first circulating pipe (13) extends below the storage tank (1), a plurality of liquid inlet holes are arranged on the top of the first circulating pipe (13), the scraper (14) is mounted on the top end of the first circulating pipe (13), and the bottom end of the scraper (14) contacts the top end of a group of sealing plates (9), the gear ring (15) is sleeved on the bottom end of the first circulating pipe (13), and the second circulating pipe (18) is sleeved on the bottom end of the first circulating pipe (13). The second motor (16) is mounted on the sewage pipe (11), the gear (17) is mounted on the output shaft of the second motor (16), and the side end of the gear (17) is meshedly connected with the side end of the gear ring (15), one end of the second circulation pipe (18) is rotatably connected with the bottom end of the first circulation pipe (13), the other end of the second circulation pipe (18) extends to the top of the storage tank (1), the circulation pump (19) is mounted on the other end of the second circulation pipe (18), and the water suction port of the circulation pump (19) is communicated with the inside of the second circulation pipe (18), the spray pipe (20) is rotatably mounted on the drainage port of the circulation pump (19), and a plurality of groups of atomizing nozzles (21) are all obliquely mounted on the bottom end of the spray pipe (20).

10. The method for deodorizing biogas slurry fertilizer according to claim 7, characterized in that: The atomizing mechanism comprises a mixing tube (22) and a spiral blade (23); the mixing tube (22) is mounted on the storage tank (1), and one end of the mixing tube (22) extends into the interior of the storage tank (1); an atomizing nozzle is arranged on one end of the mixing tube (22); and a plurality of groups 24 are arranged on the other end of the mixing tube (22).

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