A biogas slurry and biogas residue conveying and proportioning device for fertilization

Abstract

The present invention relates to the technical field of fertilizer proportioning, and specifically discloses a biogas slurry and biogas residue conveying and proportioning device for fertilization. The device includes a floating biogas slurry conveying assembly and a biogas residue conveying assembly located within a vehicle-mounted biogas slurry tank, each for independently conveying biogas slurry and bottom-layer biogas residue, respectively. A proportional valve in a negative pressure proportioning mechanism dynamically adjusts the delivery ratio of the biogas slurry and biogas residue, ensuring a precise and controllable mixing ratio. Through two-stage proportioning and mixing, the proportioned biogas slurry and biogas residue mixture can be mixed again with solid fertilizer in a confluence tank in accordance with a specific ratio to form an efficient and precise fertilizer material. A fertilizer hopper and a quantitative distributor are also provided for accurately adding fixed fertilizer, and fertilization of crops is achieved through a fertilizer discharge pipe and plowshare. Through precise proportioning, dynamic adjustment, and two-stage mixing, the present invention significantly improves fertilization efficiency and resource utilization, reduces environmental pollution, and is suitable for large-scale agricultural production.

Description

Technical Field

[0001] The present invention relates to the technical field of fertilizer proportioning, and in particular to a biogas slurry and biogas residue conveying and proportioning device for fertilization. Background Art

[0002] The transport of biogas slurry and biogas residue for fertilization involves mixing the biogas slurry and biogas residue produced in a biogas digester in a specific ratio and transporting them to farmland for application as organic fertilizer to crops. The middle layer of a biogas digester is liquid (clear biogas in the upper middle portion, suspended liquid in the lower half), commonly referred to as biogas slurry. The bottom layer is a muddy sediment, referred to as biogas residue. Biogas slurry and biogas residue differ significantly in their physical form, nutrient content, and microbial composition. Biogas slurry primarily consists of water, available nitrogen (such as ammoniacal nitrogen and nitrate nitrogen), available phosphorus, available potassium, and various trace elements. It is also rich in microorganisms and organic acids. The available nitrogen in biogas slurry is rapidly absorbed by crops, promoting rapid growth. Available phosphorus and potassium help improve crop disease resistance and yield. Trace elements and organic acids help improve soil structure and fertility. Biogas residue is primarily composed of organic matter, cellulose, hemicellulose, lignin, and a small amount of minerals, along with a certain amount of microorganisms and humus. The organic matter in biogas residue needs to be gradually released through mineralization to provide long-term nutrients for crops. Cellulose and lignin help improve soil structure and enhance its water and fertilizer retention capacity, while microorganisms and humus help promote soil microbial activity and improve soil fertility. Therefore, biogas slurry and biogas residue each have their own unique roles in the fertilization process and need to be mixed in a specific ratio to fully realize their fertilizer effects.

[0003] Existing technologies, such as Li Wenzhe's article "Design and Experiment of a Liquid and Sludge Submersible Fertilizer Applicator," published in the November 2014 issue of the Journal of Agricultural Machinery, Vol. 45, No. 11, proposes a liquid biogas fertilizer submersible fertilization machine. This machine utilizes a towed tanker truck equipped with a distributor that prevents blockage and distributes biogas fertilizer through a rotor. It can complete multiple operations, including soil loosening and fertilization, in a single trip. This device utilizes a direct mixing and delivery of biogas liquid and biogas residue. Specifically, biogas liquid and biogas residue are directly mixed and delivered to farmland using a simple mixing or pumping device. While this method allows for liquid biogas fertilizer application, the mixing ratio cannot be precisely controlled.

[0004] Using this direct mixing method for fertilization operations makes it difficult to ensure uniform mixing of the biogas slurry and biogas residue, and the effects after fertilization vary greatly; and since the ratio cannot be accurately controlled, it may lead to excessive use of biogas slurry or biogas residue, resulting in waste of resources; unreasonable ratios and mixing methods may lead to the discharge of biogas slurry and biogas residue, causing pollution to the environment.

[0005] Therefore, it is necessary to develop a biogas slurry and biogas residue conveying and proportioning device for fertilization. Summary of the Invention

[0006] In response to the above-mentioned defects and problems, the present invention provides a biogas slurry and biogas residue conveying and proportioning device for fertilization, the purpose of which is to respectively convey independent biogas slurry and biogas residue to a negative pressure proportioning mechanism through a floating biogas slurry conveying component and a biogas residue conveying component, control the output ratio of biogas slurry and biogas residue through the negative pressure proportioning mechanism, and accurately control the ratio of biogas slurry to biogas residue, so that the biogas slurry and biogas residue achieve a reasonable and effective ratio, thereby improving the fertilization effect and resource utilization.

[0007] The solution adopted by the present invention to solve its technical problems is: a device for conveying and proportioning biogas slurry and biogas residue for fertilization, comprising a floating biogas slurry conveying component, a biogas residue conveying component and a negative pressure proportioning mechanism, the floating biogas slurry conveying component and the biogas residue conveying component are arranged in a vehicle-mounted biogas slurry tank, the floating biogas slurry conveying component is used to independently output biogas slurry, the floating biogas slurry conveying component comprises a floating suction head, a suction hose and a biogas pipe, the floating suction head located in the vehicle-mounted biogas slurry tank is connected to the external biogas pipe through the suction hose; the biogas residue conveying component is used to independently output biogas residue; the negative pressure proportioning mechanism comprises a proportional valve, a suction pump and a cache box, the output ends of the floating biogas slurry conveying component and the biogas residue conveying component are respectively and independently connected to the two input ends of the proportional valve, the proportional valve is used to control the conveying ratio of biogas slurry and biogas residue, the suction pump is connected to the output end of the proportional valve, and the proportioned and mixed biogas slurry and biogas residue are conveyed to the cache box.

[0008] The top of described outer cover is hinged on the base, and the bottom of described outer cover is hinged on the base, and the bottom of described outer cover is hinged on the base, and the top of described outer cover is hinged on the base, and the bottom of described outer cover is hinged on the base;

[0009] Preferably, an integrated seat is installed on the top of the upper top plate, the sludge pipe and the air pipe are sleeved in the integrated seat, and a top protective cover is sleeved above the integrated seat.

[0010] Preferably, a long sliding sleeve is provided on the lower edge of the top of the outer sliding cover, and the outer sliding cover is slidably mounted on the vertical rod of the fixed frame through the long sliding sleeve. A short sliding sleeve is provided on the upper edge of the bottom of the inner sliding cover, and the inner sliding cover is slidably mounted on the vertical rod of the fixed frame through the short sliding sleeve. The side spring is installed between the long sliding sleeve and the short sliding sleeve.

[0011] Preferably, the rubber ring and filter screen assembly includes a rubber ring, a steel ring and a filter screen, the rubber ring is fixed to the bottom of the steel ring, the steel ring is fixedly installed on the lower edge of the bottom of the inner sliding cover, and the filter screen is installed in the steel ring.

[0012] Preferably, the proportional valve includes a valve body, a valve core and a driving member. The valve core is mounted in the valve body. A slurry inlet and a sludge inlet are provided on the valve body. The slurry outlet and the sludge outlet are connected to the suction pump through a collecting pipe, and radial liquid holes and radial mud holes are provided on the valve core. The driving member is used to control the axial movement of the valve core and adjust the delivery ratio of the slurry and sludge.

[0013] Preferably, it also includes a biogas-fertilizer mixing mechanism, which includes a flow valve, a fertilizer hopper, a quantitative distributor, a junction tank and a fertilizer discharge pipe. The flow valve is used to control the flow of biogas slurry and residue transported from the buffer box to the junction tank. The fertilizer hopper supplies fertilizer to the quantitative distributor. The quantitative distributor is used to discharge the fertilizer into the junction tank in a quantitative manner. The fertilizer discharge pipe is installed at the output end of the junction tank.

[0014] Preferably, the cache box is a cylindrical structure with a tangential inlet at the top of the cache box, a stirring rod provided in the cache box, and a concentration meter installed in the cache box, with signals connected between the concentration meter and the proportional valve and the controller.

[0015] Preferably, it further comprises a traction unit, which comprises a tractor and a frame, and the floating biogas slurry conveying component, the biogas residue conveying component, the negative pressure proportioning mechanism and the vehicle-mounted biogas slurry tank are located on the frame.

[0016] The beneficial effects of the present invention are as follows: the present invention uses independent floating biogas slurry conveying components and biogas residue conveying components to convey biogas slurry and biogas residue respectively, ensuring that the biogas slurry and biogas residue will not mix during the conveying process; the floating biogas slurry conveying component only sucks surface biogas through the floating suction head to ensure that the output biogas slurry is clear; the biogas residue conveying component outputs biogas residue separately to ensure the purity of the biogas residue, thereby avoiding the problem that traditional direct mixing cannot accurately control the ratio.

[0017] The proportional valve in the negative pressure proportioning mechanism controls the axial movement of the valve core through a servo motor to dynamically adjust the delivery ratio of the biogas slurry and the biogas residue. The proportional valve can accurately control the ratio of the biogas slurry and the biogas residue, and dynamically adjust the delivery flow of the biogas slurry and the biogas residue according to actual needs, thereby achieving a precise ratio of the biogas slurry and the biogas residue, ensuring that the mixed biogas slurry and biogas residue mixture has a reasonable ratio, and realizing an effective ratio of the biogas slurry and the biogas residue. The precise ratio enables the biogas slurry and the biogas residue to give full play to their respective fertilizer efficiency characteristics after mixing, and the quick-acting nitrogen of the biogas slurry and the organic matter of the biogas residue can work synergistically to improve the fertilization effect while avoiding waste of resources.

[0018] The present invention has a two-stage proportioning and mixing function. In the first stage, the biogas slurry and biogas residue are mixed in proportion through a proportional valve to form a biogas slurry-biogas residue mixture. The second stage is to mix the biogas slurry-biogas residue mixture with solid fertilizer again in proportion in a combining tank, which can meet the nutritional needs of different crops.

[0019] By connecting the controller with the proportional valve, flow valve and quantitative distributor signals, the delivery ratio of liquid biogas and sludge, as well as the delivery volume of the liquid biogas and sludge mixture and solid fertilizer can be dynamically adjusted according to the detection results of the concentration meter. The ratio can be adjusted at any time according to actual needs, so that the device can adapt to different crops, soils and fertilization requirements, thereby improving the applicability and practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the frame structure of the present invention;

[0022] Figure 3 It is a side view of the rack;

[0023] Figure 4 is a flow chart showing the connections of the components of the present invention;

[0024] Figure 5 It is a schematic diagram of the specific structure of the proportional valve;

[0025] Figure 6 This is a schematic diagram of the structure of the pulse-type biogas residue conveying component;

[0026] Figure 7 It is an internal cross-sectional view of a pulsed digestate conveying assembly;

[0027] Figure 8 It is a cross-sectional schematic diagram of a pulsed biogas slag conveying assembly;

[0028] Figure 9 This is a schematic diagram of the structure of the pulse-type biogas slag conveying component assembled into the vehicle-mounted biogas liquid tank.

[0029] In the figure: 1. Tractor; 2. Frame; 3. On-board biogas slurry tank; 4. Floating biogas slurry conveying assembly; 41. Floating suction head; 42. Suction hose; 43. Biogas slurry pipe; 5. Pulse biogas residue conveying assembly; 51. Fixing frame; 52. Upper top plate; 53. Lower top plate; 54. Outer sliding cover; 55. Inner sliding cover; 56. Biogas residue pipe; 57. Air pipe; 58. Side spring; 59. Transverse pipe; 591. Through-hole partition; 592. Mud chamber; 593. Air chamber; 510. Outer hose; 511. Inner hose; 512. Piston; 513. Through hole; 514. Transverse spring; 515. Connecting pipe; 516. Rubber ring ; 517, steel ring; 518, filter screen; 519, long sleeve; 520, short sleeve; 521, integrated seat; 522, top protection cover; 6, negative pressure proportioning mechanism; 61, suction pump; 62, buffer box; 63, proportional valve; 631, valve body; 632, valve core; 634, biogas slurry inlet; 635, biogas slurry outlet; 636, biogas residue inlet; 637, biogas residue outlet; 638, collecting pipe; 639, radial liquid hole; 640, radial mud hole; 65, driving part; 7, biogas-fertilizer mixing mechanism; 71, flow valve; 72, fertilizer hopper; 73, quantitative distributor; 74, confluence trough; 75, fertilizer discharge pipe. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and examples.

[0031] Example 1: In the prior art, biogas slurry and biogas residue are typically transported and fertilized using a direct mixing method. Specifically, biogas slurry and biogas residue in a biogas tank are directly mixed using a simple stirring or pumping device and then transported to farmland. Although this operation is simple, the mixing ratio of biogas slurry and biogas residue cannot be precisely controlled, resulting in unstable fertilization results. Furthermore, direct mixing makes it difficult to ensure uniform mixing of biogas slurry and biogas residue, leading to large variations in fertilization results. Furthermore, the inability to precisely control the mixing ratio may lead to excessive use of biogas slurry or biogas residue, resulting in a waste of resources. Furthermore, improper mixing and mixing may cause the discharged biogas slurry and biogas residue to pollute the environment.

[0032] To address the above issues, this embodiment provides a biogas slurry and biogas residue conveying and proportioning device for fertilization, comprising a floating biogas slurry conveying assembly 4, a biogas residue conveying assembly, a negative pressure proportioning mechanism 6, a biogas-fertilizer mixing mechanism 7, and a traction unit. The device aims to address the problem of accurately and rationally proportioning biogas slurry and biogas residue for delivery. The floating biogas slurry conveying assembly 4 and the biogas residue conveying assembly respectively convey the biogas slurry and biogas residue to the negative pressure proportioning mechanism 6. A biogas residue proportioning valve 63 precisely controls the biogas slurry-to-slag ratio, achieving a reasonable and effective proportion of the biogas slurry and biogas residue.

[0033] like Figure 1-3As shown, the traction unit includes a tractor 1 and a frame 2. The floating biogas slurry conveying component 4, the biogas residue conveying component, the negative pressure proportioning mechanism 6, and the biogas fertilizer mixing mechanism 7 are all arranged on the frame 2. A vehicle-mounted biogas slurry tank 3 is installed on the frame 2. The biogas slurry and biogas residue in the external biogas tank are transported to the vehicle-mounted biogas slurry tank 3 by a pump. The middle of the biogas tank is liquid (the upper middle part is clear liquid, and the lower half is suspended liquid), which is usually called biogas slurry, and the bottom is muddy sediment, which is called biogas residue. The same is true for the biogas slurry and biogas residue in the vehicle-mounted biogas tank 3.

[0034] like Figure 4 As shown, the floating biogas slurry conveying assembly 4 is used to independently output biogas slurry, including a floating suction head 41, a suction hose 42 and a biogas slurry pipe 43. The floating suction head 41 is loaded into the vehicle-mounted biogas slurry tank 3 and can realize floating suction of biogas slurry. The floating suction head 41 is connected to the biogas slurry pipe 43 through the suction hose 42. The floating suction head 41 only sucks the top layer of biogas slurry, and the biogas slurry outputted to the outside is clear.

[0035] The biogas residue conveying component is used to independently output the biogas residue. The biogas residue conveying component can adopt an existing sludge suction device. For example, a bottom trough is installed at the bottom of the vehicle-mounted biogas liquid tank 3, and the inner bottom of the bottom trough is connected to the biogas residue pipe 56 to output the biogas residue separately.

[0036] like Figure 2-4 As shown, the negative pressure proportioning mechanism 6 includes a proportional valve 63, a suction pump 61 and a cache box 62. The proportional valve 63 and the suction pump 61 are both installed on the top of the vehicle-mounted biogas slurry tank 3. The output ends of the floating biogas slurry conveying component 4 and the biogas residue conveying component extend out of the top of the vehicle-mounted biogas slurry tank 3 and are independently connected to the two input ends of the proportional valve 63. The proportional valve 63 is used to control the conveying ratio of biogas slurry and biogas residue, and to proportion and mix the biogas slurry and biogas residue. The suction pump 61 is connected to the output end of the proportional valve 63 to convey the proportioned and mixed biogas slurry and biogas residue to the cache box 62. The cache box 62 is fixedly mounted on the frame 2.

[0037] The cache box 62 can adopt a horizontal structure, and a stirring rod is provided in the cache box 62. The stirring rod is driven by an external motor and can stir the sludge and sludge mixture in the cache box 62 to ensure uniform mixing. A concentration meter is installed in the cache box 62 to detect the concentration of the sludge and sludge mixture in real time, and the concentration meter is connected to the controller signal. The concentration of the sludge and sludge mixture is detected by the concentration meter, and the proportional valve 63 can be dynamically adjusted at any time, thereby dynamically adjusting the delivery flow rate of the sludge and sludge to ensure that the concentration of the mixture is always within a reasonable range.

[0038] like Figure 4-5As shown, the proportional valve 63 includes a valve body 631, a valve core 632 and a driving member 65. The driving member 65 adopts a servo motor. The valve core 632 is mounted in the valve body 631, and a liquid biogas inlet 634 and a liquid biogas outlet 635, as well as a sludge inlet 636 and a sludge outlet 637 are correspondingly provided on the valve body 631. The output end of the liquid biogas pipe 43 is connected to the liquid biogas inlet 634, the output end of the sludge pipe 56 is connected to the sludge inlet 636, the liquid biogas outlet 635 and the sludge outlet 637 are connected to the suction pump 61 through the collecting pipe 638, and the proportional valve 63 is connected to the controller signal.

[0039] A radial liquid hole 639 and a radial mud hole 640 are provided through the valve core 632, and the driving member 65 is used to control the axial movement of the valve core 632, control the delivery flow of the biogas slurry and biogas residue, and adjust the delivery ratio of the biogas slurry and biogas residue. The biogas slurry and biogas residue in the vehicle-mounted biogas slurry tank 3 can be pumped to the proportional valve 63 through the negative pressure suction of the suction pump 61. After the biogas slurry and biogas residue are proportioned through the proportional valve 63, the biogas slurry and biogas residue mixture is transported to the buffer box 62, thereby realizing a reasonable and effective proportion of the biogas slurry and biogas residue.

[0040] A liquid channel is formed between the radial liquid hole 639 and the liquid manure inlet 634 and the liquid manure outlet 635, and a sludge channel is formed between the radial mud hole 640 and the sludge inlet 636 and the sludge outlet 637. The servo motor controls the axial movement of the valve core 632 to adjust the size of the liquid channel and the sludge channel, thereby adjusting the conveying flow rate of the liquid and sludge.

[0041] For example, there are five adjustment states:

[0042] When the biogas liquid channel is fully open, the biogas residue channel is fully blocked, and the output of biogas liquid is at its maximum. At this time, only biogas liquid is output.

[0043] When the biogas liquid channel begins to decrease and the biogas residue channel begins to increase, the biogas liquid channel is larger than the biogas residue channel, and the output of biogas liquid is greater than the output of biogas residue;

[0044] When the size of the biogas slurry channel and the biogas residue channel is the same, the output of the biogas slurry and the biogas residue is the same;

[0045] When the biogas liquid channel continues to decrease and the biogas residue channel continues to increase, the biogas residue channel is larger than the biogas liquid channel, and the output of the biogas residue is greater than the output of the biogas liquid;

[0046] When the biogas liquid channel is completely blocked, the biogas residue channel is fully open, and the output of biogas residue is maximum. At this time, only biogas residue is output.

[0047] like Figure 2-4As shown, the biogas-fertilizer mixing mechanism 7 includes a flow valve 71, a fertilizer hopper 72, a quantitative distributor 73, a confluence trough 74 and a fertilizer discharge pipe 75. The fertilizer hopper 72, the quantitative distributor 73 and the confluence trough 74 are fixedly mounted on the frame 2 from top to bottom. The fertilizer discharge pipe 75 is mounted at the output end at the bottom of the confluence trough 74, and a plowshare is provided on the front side of the fertilizer discharge pipe 75. The plowshare can be adjusted vertically by sliding. A lock hole and a lock pin are provided on the frame 2, and the plowshare can be locked after sliding adjustment.

[0048] The cache box 62 is connected to the confluence tank 74 through a pipeline, and can transport the mixed sludge and biogas residue mixture to the confluence tank 74. The flow valve 71 is installed on the pipeline between the cache box 62 and the confluence tank 74. The flow valve 71 controls the flow of the sludge and biogas residue mixture transported from the cache box 62 to the confluence tank 74. The fertilizer hopper 72 supplies solid fertilizer (biofertilizer) to the quantitative distributor 73, and the quantitative distributor 73 can discharge the fertilizer into the confluence tank 74 in a quantitative manner, and the quantitative distributor 73 can adjust the delivery amount of solid fertilizer. The quantitative distributor 73 adopts the existing technology and its structure is not described in detail.

[0049] Flow valve 71 and quantitative distributor 73 are connected to the controller signal. These valves are dynamically adjustable: they can dynamically adjust the delivery rate of the biogas slurry and biogas residue mixture, while the quantitative distributor 73 can dynamically adjust the delivery rate of solid fertilizer. These valves are used to re-mix the biogas slurry and biogas residue mixture with the solid fertilizer in the appropriate proportions and transfer them to the confluence tank 74.

[0050] This solution has two-stage proportioning and mixing. The first-stage proportioning is that the biogas liquid and the biogas residue are proportioned and mixed in the proportional valve 63 to form a biogas liquid-biogas residue mixture. The second-stage proportioning is that the biogas liquid-biogas residue mixture and the solid fertilizer are proportioned and mixed in the confluence tank 74, finally realizing two-stage proportioning and mixing.

[0051] The four floating biogas slurry conveying components only suck and convey the surface biogas slurry, and the biogas residue conveying components only suck and convey the bottom biogas residue. By sucking and then proportioning separately, a precise proportioning effect can be achieved. Although the existing technology can adopt the method of direct stirring and mixing and then sucking and conveying, it is impossible to achieve precise control of the proportion. The design features of this scheme require the biogas slurry and biogas residue to be separated, proportioned and then mixed, so as to facilitate precise control of the mixing ratio.

[0052] There are significant differences between sludge and biogas residue in physical form, nutrient composition and microbial composition. The fast-acting nitrogen in sludge can be quickly absorbed by crops, while the organic matter in biogas residue needs to be gradually released through mineralization. Biogas sludge and biogas residue have their own functions and cannot be used separately. They need to be mixed in a certain proportion. The biogas sludge and biogas residue are respectively transported outward by the floating biogas sludge conveying component 4 and the biogas residue conveying component, and are proportioned by the proportional valve 63 and then transported to the buffer box 62. The biogas sludge and biogas residue mixture is mixed with solid fertilizer in proportion in the confluence tank 74 by the biogas-fertilizer mixing mechanism 7, and then discharged through the fertilizer discharge pipe 75.

[0053] Preferably, the biogas slag conveying component is sucked and conveyed through the biogas slag pipe 56. The biogas slag pipe 56 may be easily blocked and the amount of biogas liquid entering is large. The biogas liquid and biogas slag in the on-board biogas tank 3 are mixed. When the biogas slag is sucked alone by the biogas slag, a large amount of biogas liquid may be sucked in by the biogas slag pipe 43. In addition, the biogas slag suction by the pipeline is also prone to blockage. Therefore, the biogas slag conveying component can also adopt another structure. The biogas slag conveying component is a pulse biogas slag conveying component 5, such as Figure 9 As shown, the pulsed biogas residue conveying assembly 5 is placed at the bottom of the vehicle-mounted biogas liquid tank 3. Figure 6-8 As shown, the pulse-type sludge conveying assembly 5 includes a fixed frame 51, an upper top plate 52, a lower top plate 53, an outer sliding cover 54, an inner sliding cover 55, a sludge pipe 56, an air pipe 57 and a side spring 58. The upper top plate 52 and the lower top plate 53 are respectively fixedly installed on the top and bottom of the fixed frame 51, and can support the entire fixed frame 51. The outer sliding cover 54 and the inner sliding cover 55 are respectively and independently slidably installed on the fixed frame 51, wherein the inner sliding cover 55 is nested on the inner side of the outer sliding cover 54, and the two constitute an inner and outer nested sliding structure, and both can slide axially relative to the fixed frame 51, and an anti-slip part is also provided between the inner sliding cover 55 and the outer sliding cover 54 to prevent the inner sliding cover 55 from detaching from the outer sliding cover 54.

[0054] The top and bottom of the inner sliding cover 55 are penetrated from top to bottom, and a rubber ring filter assembly is installed at the bottom of the inner sliding cover 55 . The side spring 58 is provided between the outer sliding cover 54 and the inner sliding cover 55 , and the side spring 58 can support the outer sliding cover 54 .

[0055] A top cavity is provided inside the upper top plate 52, in which a transverse pipe 59 is fixedly installed. The interior of the transverse pipe 59 is divided into a mud cavity 592 and an air cavity 593 by a perforated partition plate 591. The sludge pipe 56 and the air pipe 57 are respectively connected to the mud cavity 592 and the air cavity 593 of the transverse pipe 59, and the mud cavity 592 and the air cavity 593 of the transverse pipe 59 are respectively connected to the interior of the outer sliding cover 54 through an outer hose 510 and an inner hose 511. The outer hose 510 can extend to the bottom of the outer cover, and the air pipe 57 is connected to the external atmosphere, which is a natural air pipe 57.

[0056] like Figure 7As shown, a piston 512 is mounted in the air cavity 593 of the transverse tube 59, and a through hole 513 is radially penetrated on the piston 512, which matches the air pipe 57. A transverse spring 514 is connected between the piston 512 and the perforated partition 591. In the initial state, the piston 512 will be elastically pushed by the transverse spring 514 to seal the air pipe 57 and the inner hose 511. A stop is also provided in the transverse tube 59 to limit the piston 512 to ensure that the piston 512 blocks the air pipe 57, and a connecting pipe 515 is connected between the air pipe 57 and the air chamber, one end of the connecting pipe 515 is connected to the air chamber in front of the piston 512, and the other end is connected to the air pipe 57. The piston 512 can move under the action of negative pressure, so that the through hole 513 is connected to the air pipe 57 and the inner hose 511, thereby relieving the pressure inside the outer sliding cover 54.

[0057] like Figure 6 As shown, an integration seat 521 is installed on the top of the upper top plate 52, and the integration seat 521 is used to integrate and restrain the biogas residue pipe 56 and the air pipe 57, and a top protective cover 522 is set above the integration seat 521, and the restrained biogas residue pipe 56 and the air pipe 57 extend out of the top of the vehicle-mounted biogas liquid tank 3. At the same time, an auxiliary integration seat 521 is also provided on the top of the vehicle-mounted biogas liquid tank 3, which also integrates and restrains the biogas residue pipe 56 and the air pipe 57.

[0058] like Figure 6 As shown, a long sliding sleeve 519 is fixed to the top lower edge of the outer sliding cover 54, and the outer sliding cover 54 is slidably mounted on the vertical rod of the fixed frame 51 through the long sliding sleeve 519. A short sliding sleeve 520 is fixed to the bottom upper edge of the inner sliding cover 55, and the inner sliding cover 55 is slidably mounted on the vertical rod of the fixed frame 51 through the short sliding sleeve 520. The side spring 58 is installed between the long sliding sleeve 519 and the short sliding sleeve 520.

[0059] The fixing frame 51 is placed on the inner bottom of the vehicle-mounted biogas slurry tank 3 as a whole. The bottom of the vehicle-mounted biogas slurry tank 3 is a conical structure. The biogas residue is all deposited on the inner bottom of the vehicle-mounted biogas slurry tank 3. The outer sliding cover 54 and the inner sliding cover 55 are covered with biogas residue. In the initial state, the inner sliding cover 55 is in a bottom-drop state. When the suction pump 61 is working, the outer sliding cover 54 and the inner sliding cover 55 are in a negative pressure state. The biogas residue close to the bottom plane of the bottom of the vehicle-mounted biogas residue tank is sucked into the outer sliding cover 54 by the negative pressure and transported out through the biogas residue pipe 56. When the biogas residue cannot be pumped out, the amount of biogas residue extracted becomes less, and the speed of extracting biogas residue becomes slower, resulting in the ratio not being reached, as the negative pressure is sucked, the negative pressure inside the inner sliding cover 55 and the outer sliding cover 54 will gradually increase. Under the action of the negative pressure, the outer sliding cover 54 will gradually move downward toward the inner sliding cover 55, and compress the side spring 58, so that the outer sliding cover 54 and the inner sliding cover 55 are in a pressed state. When the inner sliding cover 55 is compressed to a certain extent, the negative pressure inside the outer sliding cover 54 increases. At this time, under the action of the increased negative pressure, the piston 512 in the cross tube 59 is moved by the negative pressure, so that the through hole 513 of the piston 512 is connected to the air pipe 57 and the inner hose 511, and the outside atmosphere is introduced into the outer sliding cover 54. At the moment when the outer sliding cover 54 is admitted, the pressure inside the outer sliding cover 54 is released, and the outer sliding cover 54 is pushed upward by the side spring 58 to bounce open, which will drive the inner cover to move upward, and the piston 512 is reset to block the air pipe 57 again. During the suction process, the outer sliding cover 54 and the inner sliding cover 55 work in a continuous up and down pulse fluctuation. The outer sliding cover 54 is sucked down by the negative pressure and then bounces up again due to the pressure relief. The frequency is 0.5-1 times per second. Through dynamic pulse suction, the biogas residue at the bottom of the vehicle-mounted biogas slurry tank 3 with the highest purity can be continuously sucked away.

[0060] That is to say, when sucking the sludge, it is always a dynamic pulse suction. The outer sliding cover 54 moves upward and the inner sliding cover 55 moves upward, and then the inner sliding cover 55 falls, and the sludge is sucked into the outer sliding cover 54 through the inner sliding cover 55. When the sludge cannot be sucked out, the negative pressure inside the outer sliding cover 54 becomes greater, and the outer sliding cover 54 is compressed and moved downward by the negative pressure. Then the outer sliding cover 54 introduces air and is depressurized, and then bounces up again, repeating the cycle.

[0061] When sucking the sludge, the interior of the outer sliding cover 54 and the inner sliding cover 55 are both in a negative pressure state, so the sludge can be sucked out without introducing the outside atmosphere. When the sludge cannot be sucked out, the movement of the piston 512 will realize the pressure relief inside the outer sliding cover 54, so that the outer sliding cover 54 moves up and continues to suck the sludge.

[0062] As long as the sludge cannot be sucked out or the amount of sludge sucked out is small, the negative pressure inside the inner sliding cover 55 will increase, the outer sliding cover 54 will move down, and then the piston 512 will be moved open by the negative pressure, and the outside air will be introduced into the outer cover to relieve the pressure, and the outer cover will bounce up. The working process of the outer sliding cover 54 and the inner sliding cover 55 is dynamic pulse suction.

[0063] By setting up the pulse-type biogas residue conveying component 5, the biogas residue in the bottom layer of the on-board biogas liquid tank 3, that is, the biogas residue with the highest purity, can be constantly sucked, so that the biogas liquid and the high-purity biogas residue are mixed in proportion, and no blockage will occur when sucking the biogas residue at the bottom layer, because the outer sliding cover 54 and the inner sliding cover 55 are constantly fluctuating. If a blockage occurs and the biogas residue cannot be sucked out, the outer cover will automatically pop up and move. In addition, although the biogas residue is sucked out in a pulse-type manner, normal suction of the biogas residue can be achieved under continuous conditions, and the introduction of external air will not affect the ratio of biogas liquid and biogas residue.

[0064] Compared with ordinary suction of biogas residue, pulse suction of biogas residue has the characteristics of anti-clogging and is not prone to clogging. It has a dynamic pulse suction effect, reduces the amount of biogas liquid entering, increases the amount of biogas residue entering, and improves the ratio accuracy. Through the pulse suction of biogas residue, the transportation efficiency and stability of biogas residue are improved, and the biogas residue is prevented from being blocked during the suction process.

[0065] This solution aims to solve the following problems: (1) the effective ratio of biogas slurry and biogas residue; (2) the high purity of the biogas residue, which facilitates the accurate calculation of the ratio, and the reliability of biogas residue suction, which will not cause blockage due to continuous pulse suction.

[0066] Example 2: A biogas slurry and biogas residue conveying and proportioning device for fertilization in this embodiment is described centering on the differences from Example 1.

[0067] In this embodiment, the cache box 62 can adopt a cylindrical structure. When the cache box 62 adopts a cylindrical structure, a tangential inlet is opened at the top of the cache box 62. The proportioned sludge and sludge mixture can enter the cache box 62 along the tangential inlet, and has a rotational mixing effect on the inner wall of the cache box 62. The sludge and sludge mixture after rotational mixing is output outward through the bottom of the cache box 62.

[0068] Example 3: A biogas slurry and biogas residue conveying and proportioning device for fertilization in this embodiment is described centering on the differences from Example 1.

[0069] In this embodiment, Figure 6-7 As shown, the rubber ring filter screen assembly includes a rubber ring 516, a steel ring 517 and a filter screen 518. The rubber ring 516 is fixed to the bottom of the steel ring 517. The steel ring 517 is fixedly installed on the bottom lower edge of the inner sliding cover 55, and the filter screen 518 is installed in the steel ring 517. The filter screen 518 is a large-mesh filter screen 518, which can filter the sludge.

[0070] Example 4: A biogas slurry and biogas residue conveying and proportioning device for fertilization in this embodiment is described centering on the differences from Example 1.

[0071] In this embodiment, a feed filter 518 is provided at the top inlet of the vehicle-mounted biogas slurry tank 3. When the biogas slurry and biogas residue in the biogas slurry pool are transported to the vehicle-mounted biogas slurry tank 3, the biogas residue can be filtered through the feed filter 518 to intercept larger debris, and an opening and closing flange cover is installed at the bottom of the vehicle-mounted biogas slurry tank 3. The opening and closing flange cover can be used to open the vehicle-mounted biogas slurry tank 3 and clean the interior. The biogas slurry and biogas residue are corrosive, so when the biogas slurry and biogas residue are used up, the interior of the vehicle-mounted biogas slurry tank 3 needs to be cleaned.

[0072] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A biogas slurry and biogas residue conveying and proportioning device for fertilization, characterized in that: The invention comprises a floating biogas slurry conveying component (4), a biogas residue conveying component and a negative pressure proportioning mechanism (6); the floating biogas slurry conveying component (4) and the biogas residue conveying component are arranged in a vehicle-mounted biogas slurry tank (3); the floating biogas slurry conveying component (4) is used to independently output biogas slurry; the floating biogas slurry conveying component (4) comprises a floating suction head (41), a suction hose (42) and a biogas slurry pipe (43); the floating suction head (41) located in the vehicle-mounted biogas slurry tank (3) is connected to an external biogas slurry pipe (43) via the suction hose (42); The liquid pipe (43) is connected; the biogas residue conveying assembly is used to independently output biogas residue, and the biogas residue conveying assembly is a pulse biogas residue conveying assembly (5), which includes a fixed frame (51), an upper top plate (52), a lower top plate (53), an outer sliding cover (54), an inner sliding cover (55), a biogas residue pipe (56), an air pipe (57) and a side spring (58); the upper top plate (52) and the lower top plate (53) are respectively installed on the top and bottom of the fixed frame (51), and the outer sliding cover (54) and the inner sliding cover (55) are respectively slidably mounted on the fixing frame (51), and the inner sliding cover (55) is slidably nested inside the outer sliding cover (54), the top and bottom of the inner sliding cover (55) are penetrated, and a rubber ring filter assembly is installed at the bottom of the inner sliding cover (55), and the side spring (58) is provided between the outer sliding cover (54) and the inner sliding cover (55); a transverse tube (59) is installed inside the upper top plate (52), and the interior of the transverse tube (59) is divided into a mud chamber (592) by a perforated partition (591) and an air cavity (593), the biogas residue pipe (56) is communicated with the mud cavity (592), the air pipe (57) is communicated with the air cavity (593), and the mud cavity (592) and the air cavity (593) are communicated with the interior of the outer sliding cover (54) through an outer hose (510) and an inner hose (511), respectively; a piston (512) is provided in the air cavity (593) of the transverse pipe (59), and the piston (512) is provided with a radially penetrating through hole (513), and the through hole (513) cooperates with the air pipe (57). The piston (512) can be elastically pushed by the transverse spring to seal the air pipe (57), and a connecting pipe (515) is further connected between the air pipe (57) and the air chamber; the negative pressure proportioning mechanism (6) comprises a proportional valve (63), a suction pump (61) and a buffer box (62); the output ends of the floating biogas slurry conveying component (4) and the biogas residue conveying component are independently connected to the two input ends of the proportional valve (63), and the proportional valve (63) is used to control the conveying ratio of biogas slurry and biogas residue. The biogas residue suction pump (61) is connected to the output end of the proportional valve (63) to convey the proportioned and mixed biogas slurry and biogas residue into the buffer box (62).

2. A biogas slurry and biogas residue conveying and proportioning device for fertilization according to claim 1, characterized in that: An integrated seat (521) is installed on the top of the upper top plate (52), the biogas residue pipe (56) and the air pipe (57) are sleeved in the integrated seat (521), and a top protective cover (522) is sleeved above the integrated seat (521).

3. The biogas slurry and biogas residue conveying and proportioning device for fertilization according to claim 1, characterized in that: A long sliding sleeve (519) is provided at the lower edge of the top of the outer sliding cover (54), and the outer sliding cover (54) is slidably mounted on the vertical rod of the fixed frame (51) through the long sliding sleeve (519). A short sliding sleeve (520) is provided at the upper edge of the bottom of the inner sliding cover (55), and the inner sliding cover (55) is slidably mounted on the vertical rod of the fixed frame (51) through the short sliding sleeve (520). The side spring (58) is installed between the long sliding sleeve (519) and the short sliding sleeve (520).

4. The biogas slurry and biogas residue conveying and proportioning device for fertilization according to claim 1, characterized in that: The rubber ring filter assembly comprises a rubber ring (516), a steel ring (517) and a filter (518), wherein the rubber ring (516) is fixed to the bottom of the steel ring (517), the steel ring (517) is fixedly mounted on the lower edge of the bottom of the inner sliding cover (55), and the filter (518) is mounted inside the steel ring (517).

5. The biogas slurry and biogas residue conveying and proportioning device for fertilization according to claim 1, characterized in that: The proportional valve (63) comprises a valve body (631), a valve core (632), and a driving member (65). The valve core (632) is sleeved in the valve body (631). A biogas liquid inlet and outlet and a biogas residue inlet and outlet are provided on the valve body (631). The biogas liquid outlet (635) and the biogas residue outlet (637) are connected to the suction pump (61) via a collecting pipe (638). A radial liquid hole (639) and a radial mud hole (640) are provided on the valve core (632). The driving member (65) is used to control the axial movement of the valve core (632) to adjust the delivery ratio of the biogas liquid and the biogas residue.

6. The biogas slurry and biogas residue conveying and proportioning device for fertilization according to claim 1, characterized in that: The biogas-fertilizer mixing mechanism (7) is further included. The biogas-fertilizer mixing mechanism (7) includes a flow valve (71), a fertilizer hopper (72), a quantitative distributor (73), a merging tank (74) and a fertilizer discharge pipe (75). The flow valve (71) is used to control the flow of biogas liquid and biogas residue transported from the buffer box (62) to the merging tank (74). The fertilizer hopper (72) supplies fertilizer to the quantitative distributor (73). The quantitative distributor (73) is used to discharge the fertilizer into the merging tank (74) in a quantitative manner. The fertilizer discharge pipe (75) is installed at the output end of the merging tank (74).

7. The biogas slurry and biogas residue conveying and proportioning device for fertilization according to claim 1, characterized in that: The cache box (62) is a cylindrical structure, with a tangential inlet opened at the top of the cache box (62), a stirring rod arranged in the cache box (62), and a concentration meter installed in the cache box (62), and a signal connection between the concentration meter and the proportional valve (63) and the controller.

8. The biogas slurry and biogas residue conveying and proportioning device for fertilization according to claim 1, characterized in that: It also includes a traction unit, which includes a traction vehicle (1) and a frame (2). The floating biogas slurry conveying component (4), the biogas residue conveying component, the negative pressure proportioning mechanism (6) and the vehicle-mounted biogas slurry tank (3) are located on the frame (2).

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