Blended fertilizer production equipment and method

Abstract

The invention discloses bulk blending fertilizer production equipment and a bulk blending fertilizer production method. The equipment comprises a mixed material conveying device and a plurality of weighing and discharging devices, the plurality of solid weighing and discharging devices and the plurality of liquid weighing and discharging devices are arranged in the conveying direction of the aggregate conveying structure; each weighing and discharging device comprises a material storage container, a weighing structure and a discharging and conveying structure, the material storage container is installed on a support through the weighing structure, and the material storage container of the solid weighing and discharging device discharges solid raw materials to the material collecting and conveying structure through the discharging and conveying structure; a material storage container of the liquid weighing and discharging device is used for discharging a liquid raw material to the stirring and mixing structure through a discharging and conveying structure. Dynamic weightlessness monitoring is carried out from the weighing and discharging stage to the mixing and conveying stage, continuous production of the blended fertilizer is achieved, meanwhile, it is guaranteed that all components in the blended fertilizer are accurately proportioned, and therefore the production efficiency of the blended fertilizer product is improved, and meanwhile the quality consistency of the blended fertilizer product can be improved.

Description

Technical Field

[0001] This invention relates to the field of fertilizer production equipment technology, and in particular, to a blended fertilizer production equipment and method. Background Technology

[0002] Traditional blended fertilizer production methods are intermittent mixing methods, using computer-controlled static batching equipment to transport various raw materials to their respective lifting silos, and then to a mixing machine for mixing according to the specified ratio. After being mixed evenly, the mixture is sent to packaging equipment for weighing and packaging. This type of blended fertilizer production equipment has insufficient production capacity, and the various components in the produced fertilizer are unstable and prone to segregation, making the production process relatively extensive. Summary of the Invention

[0003] The purpose of this invention is to provide a blended fertilizer production equipment and method to solve the technical problems of insufficient production capacity and unstable deviation of various components in fertilizers in existing blended fertilizer production equipment.

[0004] The above-mentioned objectives of the present invention can be achieved by the following technical solutions:

[0005] This invention provides a blended fertilizer production equipment, including a mixing and conveying device and multiple weighing and discharging devices. The mixing and conveying device includes a material collection and conveying structure and a mixing and blending structure. The discharge end of the material collection and conveying structure is located above the inlet end of the mixing and blending structure. The multiple weighing and discharging devices include multiple solid weighing and discharging devices arranged along the conveying direction of the material collection and conveying structure and liquid weighing and discharging devices extending into the mixing and blending structure. Each weighing and discharging device includes a storage container, a weighing structure, and a discharging and conveying structure. The storage container is mounted on a support via the weighing structure. The storage container of the solid weighing and discharging device discharges solid raw materials to the material collection and conveying structure via the discharging and conveying structure. The storage container of the liquid weighing and discharging device discharges liquid raw materials to the mixing and blending structure via the discharging and conveying structure.

[0006] In an embodiment of the present invention, the material collection and conveying structure includes a material collection and conveying belt, and a plurality of the solid weighing and discharging devices are arranged along the conveying direction of the material collection and conveying belt; the material discharge and conveying structure of the solid weighing and discharging device includes a material discharge and conveying belt, which is installed between the storage container of the solid weighing and discharging device and the material collection and conveying belt and arranged parallel to the material collection and conveying belt.

[0007] In an embodiment of the present invention, the storage container of the solid weighing and discharging device is provided with a mounting frame, and the discharge conveyor belt of the solid weighing and discharging device is mounted on the mounting frame.

[0008] In an embodiment of the present invention, the discharge and conveying structure of the liquid weighing and discharging device includes a plurality of spray heads, which are connected to the storage container of the liquid weighing and discharging device; the mixing and stirring structure includes a spiral stirring conveyor, and the plurality of spray heads extend into the spiral stirring conveyor and are arranged along the conveying direction of the spiral stirring conveyor.

[0009] In an embodiment of the present invention, the spiral blades of the spiral mixer conveyor are provided with a plurality of mixing holes spaced apart along their spiral direction.

[0010] In an embodiment of the present invention, the spiral blades of the spiral mixer conveyor have multiple spiral segments connected along its spiral direction, and the pitch of the multiple spiral segments is progressively reduced.

[0011] In an embodiment of the present invention, the weighing structure includes a plurality of weighing sensors, which are arranged at intervals along the circumference of the storage container.

[0012] In an embodiment of the present invention, the blended fertilizer production equipment further includes a control device, which is electrically connected to the material collection and conveying structure, the mixing and blending structure, and the weighing structure and the discharge and conveying structure of each of the weighing and discharging devices.

[0013] In an embodiment of the present invention, the blended fertilizer production equipment further includes a container and multiple feeding bins. The mixing conveying device and multiple weighing and discharging devices are installed inside the container, and the discharge end of the mixing conveying device extends out of the container. The multiple feeding bins are installed on the top of the container and above the storage containers of the multiple solid weighing and discharging devices.

[0014] In an embodiment of the present invention, the blended fertilizer production equipment further includes a dust removal device, which is installed on the container.

[0015] This invention also provides a method for blending fertilizer, using the aforementioned blending fertilizer production equipment. The method includes the following steps: during the feeding process of the feeding and conveying structures of the plurality of weighing and feeding devices, the method further includes the following steps: the plurality of weighing structures collect weights at a preset collection frequency; based on the weights collected by the plurality of weighing structures, calculate the weight loss of the plurality of raw materials; and based on the weight loss of the plurality of raw materials and the preset weight ratio of the plurality of raw materials, control the conveying parameters of the feeding and conveying structures of the plurality of weighing and feeding devices.

[0016] In an embodiment of the present invention, during the feeding process of the feeding and conveying structures of the plurality of weighing and feeding devices, the blending fertilizer method further includes the following steps: calculating the feeding speed of the feeding and conveying structures of the plurality of weighing and feeding devices based on the weight loss of the plurality of raw materials and the sampling frequency; controlling the conveying speed of the collecting and conveying structure based on the feeding speed of the feeding and conveying structures of the plurality of weighing and feeding devices; and controlling the stirring speed of the mixing structure based on the feeding speed of the feeding and conveying structures of the plurality of weighing and feeding devices.

[0017] The features and advantages of this invention are:

[0018] The blended fertilizer production equipment and method of the present invention involves a storage container mounted on a support via a weighing structure. This allows the weighing structure to collect the weight of the material stored in the storage container in real time as it is fed from the storage container to the mixing conveyor via a material conveying structure. The weight loss of the material is then calculated based on this weight loss and the conveying parameters of multiple feeding conveyors are controlled according to the weight loss and a preset weight ratio. By dynamically monitoring the weight loss from the weighing and feeding stage to the mixing conveying stage, continuous production of blended fertilizer is achieved while ensuring accurate proportions of various components in the blended fertilizer. This improves both the production efficiency and the quality consistency of the blended fertilizer product. Furthermore, multiple weighing and feeding devices are arranged along the conveying direction of the mixing conveyor, allowing the mixing conveyor to mix the various raw materials more evenly along its conveying direction, thus improving the quality of the blended fertilizer.

[0019] The blended fertilizer production equipment and method of the present invention, by arranging multiple solid weighing and feeding devices along the conveying direction of the collecting and conveying structure, can feed multiple solid raw materials into the collecting and conveying structure along the conveying direction of the collecting and conveying structure. During the conveying process, the multiple solid raw materials are initially blended. By setting the discharge end of the collecting and conveying structure above the inlet end of the mixing and blending structure and extending the liquid weighing and feeding device into the mixing and blending structure, one or more liquid raw materials are fed into the mixing and blending structure. The mixing and blending structure is then used to blend the multiple solid raw materials and liquid raw materials after initial blending, thereby improving the uniformity of the distribution of liquid raw materials and enabling the liquid raw materials to adhere to the surface of the solid raw materials and encapsulate the solid raw materials. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1This is a schematic diagram of the fertilizer blending equipment in this invention.

[0022] Figure 2 This is a perspective view of the fertilizer blending equipment in this invention.

[0023] Figure 3 This is a schematic diagram of the solid weighing and feeding device in this invention.

[0024] Figure 4 This is a schematic diagram of the liquid weighing and dispensing device in this invention.

[0025] Figure 5 This is a front view of the spiral stirring conveyor in this invention.

[0026] Figure 6 This is a top view of the spiral stirring conveyor in this invention.

[0027] In the picture:

[0028] 1. Mixing and conveying device; 11. Collecting and conveying structure; 111. Collecting and conveying belt; 12. Mixing and stirring structure; 121. Spiral mixer conveyor; 1211. Spiral blades; 1212. Mixing trough; 1213. Rotary shaft drive motor; 1214. Mixing hole; 1215. Large mixing hole; 1216. Small mixing hole; 1217. Rotary shaft;

[0029] 2. Weighing and feeding device; 21. Solid weighing and feeding device; 22. Liquid weighing and feeding device;

[0030] 201. Storage container; 2011. Storage hopper; 2012. Liquid storage tank;

[0031] 202. Weighing structure; 2021. Weighing sensor; 2022. Weighing platform;

[0032] 203. Material feeding and conveying structure; 2031. Material feeding and conveying belt; 2032. Material feeding and conveying belt drive motor; 2033. Mounting frame; 2034. Conveying pipeline; 2035. Diaphragm pump;

[0033] 204. First support;

[0034] 205. Second support;

[0035] 3. Feeding bin;

[0036] 4. Container; 41. Container frame; 42. Container body. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Implementation Method 1

[0039] like Figure 1 , Figure 3 and Figure 4 As shown, the present invention provides a blended fertilizer production equipment, including a mixing and conveying device 1 and multiple weighing and discharging devices 2; the multiple weighing and discharging devices 2 are arranged along the conveying direction of the mixing and conveying device 1; each weighing and discharging device 2 includes a storage container 201, a weighing structure 202 and a discharging and conveying structure 203, the storage container 201 is mounted on a support through the weighing structure 202, and the raw materials in the storage container 201 are discharged to the mixing and conveying device 1 through the discharging and conveying structure 203.

[0040] In the blended fertilizer production equipment of the present invention, the storage container 201 is mounted on a support via a weighing structure 202. This allows the weighing structure 202 to collect the weight in real time during the process of the material stored in the storage container 201 being fed to the mixing conveying device 1 via the material conveying structure. The weight loss of the material is then calculated based on the weight loss, and the current weight ratio of various raw materials is determined based on the weight loss. The feeding speed of the discharging conveying structure 203 is then controlled based on the current weight ratio, thus enabling more precise control of the ratio of various raw materials fed by multiple weighing and discharging devices 2. Furthermore, the multiple weighing and discharging devices 2 are arranged along the conveying direction of the mixing conveying device 1, thereby allowing the mixing conveying device 1 to mix the multiple raw materials more evenly along its conveying direction, improving the quality of the blended fertilizer.

[0041] like Figure 1 As shown, in an embodiment of the present invention, the mixing and conveying device 1 includes a material collection and conveying structure 11 and a mixing and conveying structure 12. The discharge end of the material collection and conveying structure 11 is located above the inlet end of the mixing and conveying structure 12. The plurality of weighing and discharging devices 2 include a plurality of solid weighing and discharging devices 21 arranged along the conveying direction of the material collection and conveying structure 11 and a liquid weighing and discharging device 22 extending into the mixing and conveying structure 12. The storage container 201 of the solid weighing and discharging device 21 discharges solid raw materials to the material collection and conveying structure 11 through the discharge conveying structure 203, and the storage container 201 of the liquid weighing and discharging device 22 discharges liquid raw materials to the mixing and conveying structure 12 through the discharge conveying structure 203.

[0042] The blended fertilizer production equipment of the present invention, by arranging multiple solid weighing and feeding devices 21 along the conveying direction of the collecting and conveying structure 11, can feed multiple solid raw materials into the collecting and conveying structure 11 along the conveying direction of the collecting and conveying structure 11. During the conveying process, the multiple solid raw materials are initially mixed. By setting the discharge end of the collecting and conveying structure 11 above the feed end of the mixing and blending structure 12 and extending the liquid weighing and feeding device 22 into the mixing and blending structure 12, one or more liquid raw materials are fed into the mixing and blending structure 12. The mixing and blending structure 12 is used to mix the multiple solid raw materials and liquid raw materials after initial mixing, thereby improving the uniformity of the distribution of liquid raw materials and enabling the liquid raw materials to adhere to the surface of the solid raw materials and coat the solid raw materials.

[0043] Specifically, such as Figure 2 As shown, to reduce dust levels, the blended fertilizer production equipment also includes a container 4 and multiple feeding hoppers 3. A mixing conveyor 1 and multiple weighing and discharging devices 2 are installed inside the container 4, with the discharge end of the mixing conveyor 1 extending from the container 4. Multiple feeding hoppers 3 are installed on the top of the container 4 and correspondingly arranged above the storage containers 201 of the multiple solid weighing and discharging devices 21. The blended fertilizer production equipment also includes a dust removal device, which is installed on the container 4. Among these, combined with... Figure 1 and Figure 2 As shown, container 4 has a frame 41 and a container body 42 mounted on the frame 41.

[0044] like Figure 3 As shown, to improve the weighing accuracy of the weighing structure 202, the weighing structure 202 includes multiple weighing sensors 2021. These multiple weighing sensors 2021 are arranged at intervals along the circumference of the storage container 201, which helps improve weighing accuracy. The number of weighing sensors 2021 may be, but is not limited to, four as in this embodiment. The specific structure and working principle of the weighing sensors 2021 are the same as in the prior art and will not be detailed here. The weight collected by the weighing structure 202 may be, but is not limited to, the average weight collected by the multiple weighing sensors 2021. The storage containers 201 of the multiple weighing and discharging devices 2 can be mounted on the same support via their weighing structures 202, or they can be mounted on different supports. As in this embodiment, the storage containers 201 of each solid weighing and discharging device 21 are respectively mounted on the first support 204 above the material collection and conveying structure 11 via their weighing structures 202. A weighing platform 2022 is mounted on a second bracket 205 via multiple weighing sensors 2021. The storage container 201 of the liquid weighing and discharging device 22 is placed on the weighing platform 2022 and located to the side of the mixing structure 12.

[0045] The number of solid weighing and feeding devices 21 is not specifically limited, and multiple solid weighing and feeding devices 21 can be selected as needed to feed different types of solid raw materials into the mixing and conveying device 1, or multiple solid weighing and feeding devices 21 can be selected to feed the same type of solid raw material into the mixing and conveying device 1. The liquid weighing and feeding device 22 is preferably set to one. When there are multiple types of liquid raw materials, the multiple liquid raw materials can be mixed in the storage container 201 of the liquid weighing and feeding device 22, and then the mixed liquid raw materials are fed into the mixing and stirring structure 12 by its discharge and conveying structure 203 to be mixed with the mixed solid raw materials.

[0046] like Figure 1 As shown, the size and type of the storage containers 201 of each solid weighing and feeding device 21 can be the same or different, and the size and type of the discharging and conveying structures 203 of each solid weighing and feeding device 21 can also be the same or different. In this embodiment, a total of seven solid weighing and feeding devices 21 are provided, six of which have larger capacities to facilitate weighing solid raw materials with a higher proportion, such as urea, potassium chloride, and diammonium phosphate, while the other has a smaller capacity to facilitate weighing solid raw materials with a smaller proportion, such as trace elements.

[0047] In addition, such as Figure 3 As shown, in order to improve the accuracy of the weight loss weighing and feeding of the weighing and feeding device 2 and further improve the accuracy of the proportion of various raw materials, in the embodiment of the present invention, the feeding and conveying structure 203 of the weighing and feeding device 2 is installed on the storage container 201 of the weighing and feeding device 2, so that the weight collected by the weighing structure 202 includes the weight of the feeding and conveying structure 203, which also includes the raw materials that are conveyed from the storage container 201 to the feeding and conveying structure 203 but not fed into the mixing and conveying device 1, thereby ensuring that the weight loss of the raw materials calculated based on the weight is equal to the weight of the raw materials actually fed into the mixing and conveying device 1 by the feeding and conveying structure 203.

[0048] Specifically, such as Figure 3 As shown, the storage container 201 of the solid weighing and discharging device 21 is a hopper, and the discharging and conveying structure 203 of the solid weighing and discharging device 21 is mounted on the hopper via a mounting bracket 2033 and is located below the discharge port of the hopper. Figure 4 As shown, the storage container 201 of the liquid weighing and discharging device 22 is a liquid storage tank 2012, and the discharge and conveying structure 203 of the liquid weighing and discharging device 22 is installed on the liquid storage tank 2012 through the conveying pipeline 2034 and is connected to the liquid storage tank 2012.

[0049] like Figure 1As shown, in order to enable various solid raw materials to be more evenly distributed on the material collection and conveying structure 11, and to facilitate the subsequent mixing structure 12 to mix the various fixed raw materials more evenly, in this embodiment of the invention, the material collection and conveying structure 11 includes a material collection conveying belt 111, and the material discharge conveying structure 203 of the solid weighing and discharging device 2 includes a material discharge conveying belt 2031. The material discharge conveying belt 2031 is installed between the storage container 201 of the solid weighing and discharging device 2 and the material collection conveying belt 111 and is arranged parallel to the material collection conveying belt 111.

[0050] like Figure 4 As shown, in order to enable the liquid raw material to be more evenly coated on the solid material, in the embodiment of the present invention, the discharge and conveying structure 203 of the liquid weighing and discharging device 22 includes multiple spray heads, which are connected to the storage container 201 of the liquid weighing and discharging device 22; the mixing structure 12 includes a spiral mixing conveyor 121, and multiple spray heads extend into the spiral mixing conveyor 121 and are arranged along the conveying direction of the spiral mixing conveyor 121.

[0051] Specifically, such as Figure 5 and Figure 6 As shown, the spiral mixing conveyor 121 has a mixing trough 1212, a rotating shaft 1217 installed inside the mixing trough 1212, and spiral blades 1211 installed on the rotating shaft 1217. The mixing trough 1212 is provided with a top slot for multiple spray heads to extend into. The number of spray heads is preferably three to six. The spray flow rate of the multiple spray heads can decrease sequentially along the conveying direction. As in this embodiment, the spray flow rate of the first spray head accounts for 30% to 40% of the total spray flow rate of the multiple spray heads, and decreases by 5% to 10% sequentially along the conveying direction. The spiral blades 1211 of the spiral mixing conveyor 121 are divided into multiple spiral blade units every 360 degrees of rotation, and the spiral channels of the spiral blades 1211 are also correspondingly divided into multiple spiral channel units. The multiple spray heads extend into multiple spiral channel units, that is, they are all located between two adjacent spiral units, and preferably at the exact center position between two adjacent spiral units. Furthermore, in embodiments of the present invention, the spiral mixing conveyor 121 is inclined upward from its input end to its output end, thereby lifting and conveying the material to subsequent packaging equipment. The inclination angle of the spiral mixing conveyor 121 is preferably between 21° and 27°.

[0052] like Figure 5As shown, in order to improve the mixing effect of the spiral mixing conveyor 121, in the embodiment of the present invention, the spiral blades 1211 of the spiral mixing conveyor 121 are provided with a plurality of mixing holes 1214 at intervals along their spiral direction. This allows a portion of the material to be backed from the mixing holes 1214 to the previous spiral channel unit and stirred again during the process of the spiral blades 1211 rotating to mix and convey the various raw materials forward. This improves the uniformity of mixing the various materials.

[0053] Furthermore, such as Figure 6 As shown, in some embodiments of the present invention, the plurality of mixing holes 1214 include a variety of mixing holes with different diameters. Specifically, the plurality of mixing holes 1214 includes a plurality of large mixing holes 1215 with larger diameters and a plurality of small mixing holes 1216 with smaller diameters. The plurality of large mixing holes 1215 are correspondingly distributed on the same side of the plurality of spiral blade units 1211, and the plurality of small mixing holes 1216 are correspondingly distributed on the other side of the plurality of spiral blade units 1211, relative to the mixing holes. In one specific embodiment of the present invention, the diameter of the large mixing holes 1215 is 120 mm, and the diameter of the small mixing holes 1216 is 60 mm.

[0054] In addition, combined Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the spiral blades 1211 of the spiral mixer conveyor 121 have multiple spiral segments connected along its spiral direction. The pitch of the multiple spiral segments is gradually reduced, so that the spiral channels of the multiple spiral segments also gradually narrow, thereby forming a multi-stage mixing effect.

[0055] The number of helical blade 1211 units in each helical segment can be one or more, and the number can be equal or unequal. In this embodiment, the first helical segment has two helical blade 1211 units with a pitch of 500 mm, the second helical segment has two helical blade units with a pitch of 450 mm, the third has two helical blade units with a pitch of 400 mm, and the fourth helical segment has one helical blade 1211 unit with a pitch of 300 mm.

[0056] like Figure 1As shown, in an embodiment of the present invention, the blended fertilizer production equipment further includes a control device, which is electrically connected to the material collection and conveying structure 11, the mixing and stirring structure 12, and the weighing structure 202 and discharge conveying structure 203 of each weighing and discharging device 2. By setting up the control device, the automation level of the blended fertilizer production equipment and the quality of the blended fertilizer can be further improved. The control device includes, but is not limited to, controlling the start / stop and conveying speed of the material collection and conveying structure 11, controlling the start / stop and stirring speed of the mixing and stirring structure 12, analyzing and processing the weight collected by the weighing structure 202 of each weighing and discharging device 2, and controlling the start / stop and conveying speed of the discharge conveying structure 203.

[0057] Specifically, the feeding conveyor belt 2031 is driven by the feeding belt drive motor 2032, the collecting conveyor belt 111 is driven by the collecting belt drive motor, and the rotating shaft 1217 is driven to rotate by the rotating shaft drive motor 1213. The control device can control the frequency of the corresponding motors through a frequency converter, thereby controlling the conveying speed of the feeding conveyor belt 2031, the conveying speed of the collecting conveyor belt 111, and the stirring speed of the spiral blades 1211. Multiple spray heads are connected to the conveying pipeline 2034, and a diaphragm pump 2035 is installed on the conveying pipeline 2034. The control device controls the output flow rate of the diaphragm pump 2035 by controlling the frequency of the motor of the diaphragm pump 2035, thereby controlling the total spray flow rate of the multiple spray heads.

[0058] Implementation Method 2

[0059] This invention also provides a method for blending fertilizers, using blending fertilizer production equipment. The blending fertilizer production equipment in this embodiment is identical in its specific structure, working principle, and beneficial effects to the blending fertilizer production equipment in Embodiment 1, and will not be repeated here.

[0060] Combination Figure 1 , Figure 3 and Figure 4 As shown, the blending fertilizer method of the present invention includes the following steps:

[0061] According to the composition of the fertilizer to be produced, various raw materials are fed into the storage containers 201 of multiple weighing and feeding devices 2 respectively; the material collection and conveying structure 11 is started; the mixing and blending structure 12 is started; the material discharge conveying structure 203 of multiple weighing and feeding devices 2 is started in sequence along the conveying direction of the mixing and conveying device 1, and the material discharge conveying structure 203 of multiple weighing and feeding devices 2 feeds the various raw materials in multiple storage containers 201 into the mixing and conveying device 1.

[0062] The timing of sequential activation of the feeding and conveying structures 203 of the multiple weighing and discharging devices 2 can be controlled based on the interval between the multiple feeding and conveying structures 203 and the conveying speed of the collecting and conveying structure 11. In this embodiment of the invention, the mixing and stirring structure 12 includes a spiral mixing conveyor 121. To achieve stable and continuous discharge, the conveying speed of the spiral mixing conveyor 121 is controlled to be the same as the conveying speed of the collecting and conveying structure 11.

[0063] Combination Figure 1 , Figure 3 and Figure 4 As shown, in an embodiment of the present invention, during the feeding process of the feeding and conveying structure 203 of the plurality of weighing and feeding devices 2, the method for blending fertilizer further includes the following steps:

[0064] Multiple weighing structures 202 collect weights at a preset sampling frequency; based on the weights collected by the multiple weighing structures 202, the weight loss of various raw materials is calculated; based on the weight loss of various raw materials and the preset weight ratio of the multiple raw materials, the conveying parameters of the feeding and conveying structures 203 of the multiple weighing and feeding devices 2 are controlled.

[0065] The blended fertilizer method of the present invention achieves continuous production of blended fertilizer while ensuring the precise proportion of various components in the blended fertilizer through dynamic weight loss monitoring from the weighing and feeding stage to the mixing and conveying stage. This improves both the production efficiency and the quality consistency of the blended fertilizer products.

[0066] Specifically, the weight loss of various raw materials can include real-time weight loss, i.e., the difference between the previously collected weight and the currently collected weight, or cumulative weight loss, i.e., the difference between the initially collected weight and the currently collected weight. The feeding speed of the feeding conveyor structure 203 can be adjusted by adjusting the conveying parameters of the feeding conveyor structure 203. Therefore, controlling the conveying parameters of the feeding conveyor structures 203 of multiple weighing and feeding devices 2 based on the weight loss of various raw materials and the preset weight ratio of multiple raw materials includes the following steps: calculating the current weight ratio of various raw materials based on the weight loss of various raw materials, and determining whether the current weight ratio is consistent with the preset weight ratio; if yes, then controlling the feeding conveyor structures 203 of multiple weighing and feeding devices 2 to maintain the current conveying parameters; if no, then reducing the conveying parameters of the feeding conveyor structure 203 corresponding to the raw material with a currently high weight ratio, and / or increasing the conveying parameters of the feeding conveyor structure 203 corresponding to the raw material with a currently low weight ratio.

[0067] Combination Figure 1 , Figure 3 and Figure 4As shown in the embodiments of the present invention, the conveying parameters of the feeding and conveying structure 203 of the multiple weighing and feeding devices 2 include the conveying speed of the feeding conveyor belt 2031 and the total spray flow rate of the multiple spray heads. Specifically, the conveying speed of the feeding conveyor belt 2031 is controlled by controlling the power frequency of the feeding belt drive motor 2032; the faster the conveying speed, the faster the feeding speed. The output flow rate of the diaphragm pump 2035 is controlled by controlling the power frequency of the motor of the diaphragm pump 2035, thereby controlling the total spray flow rate of the multiple spray heads.

[0068] Combination Figure 1 , Figure 3 and Figure 4 As shown, in an embodiment of the present invention, during the feeding process of the feeding and conveying structure 203 of the multiple weighing and feeding devices 2, the method for blending fertilizer further includes the following steps: calculating the feeding speed of the feeding and conveying structure 203 of the multiple weighing and feeding devices 2 based on the weight loss and sampling frequency of the various raw materials; controlling the conveying speed of the collecting and conveying structure 11 based on the feeding speed of the feeding and conveying structure 203 of the multiple weighing and feeding devices 2; and controlling the stirring speed of the mixing structure 12 based on the feeding speed of the feeding and conveying structure 203 of the multiple weighing and feeding devices 2.

[0069] The feeding speed refers to the weight of raw materials fed from the feeding conveyor structure 203 to the mixing conveyor device 1 per unit time. The preset sampling frequency is the interval between two consecutive samplings. Therefore, the current feeding speed can be calculated by calculating the weight loss based on the weights collected in the two samplings and the interval between the two samplings. For example, if the sampling frequency is 0.5s, the weight collected in the previous sampling is W1, and the weight collected in the next sampling is W2, then the weight loss is (W1 - W2), and the feeding speed is 2 (W1 - W2) per second.

[0070] like Figure 1 As shown, the thickness of each layer of solid raw material can be controlled by controlling the conveying speed of the collecting conveyor structure 11. With the same discharge speed of the discharging conveyor structure 203, a slower conveying speed of the collecting conveyor structure 11 results in a thicker layer of raw material, while a faster conveying speed results in a thinner layer. Therefore, controlling the conveying speed of the collecting conveyor structure 11 according to the discharge speed ensures a suitable layer thickness, which is beneficial for the initial mixing of multiple layers of solid raw materials and, consequently, for uniform mixing in the mixing structure 12. In this embodiment, the mixing speed of the mixing structure 12 is the rotation speed of the rotating shaft 1217, which also determines the conveying speed of the spiral mixing conveyor 121. Therefore, controlling the mixing speed of the mixing structure 12 according to the discharge speed ensures uniform mixing and stable continuous discharge.

[0071] Combination Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the conveying parameters of the feeding and conveying structures 203 of multiple weighing and feeding devices 2 are controlled according to the weight loss of multiple raw materials and the preset weight ratio of multiple raw materials. Specifically, this includes the following steps: calculating the current weight ratio of multiple solid raw materials based on the weight loss of each solid raw material; determining whether the current weight ratio of multiple solid raw materials is consistent with its preset weight ratio; if so, controlling the feeding and conveying structures 203 of multiple solid weighing and feeding devices 21 to maintain the current conveying parameters; if not, reducing the conveying parameters of the feeding and conveying structures 203 corresponding to the solid raw materials with a high current weight ratio, and / or increasing the conveying parameters of the feeding and conveying structures 203 corresponding to the solid raw materials with a low current weight ratio, until the current weight ratio of multiple solid raw materials meets the requirements. The requirements are as follows: the weight ratio of the liquid material must be consistent with the preset weight ratio; the total weight loss of various solid materials is calculated based on the weight loss of each solid material; the current weight ratio of the liquid material to the total solid material is calculated based on the weight loss of the liquid material and the total weight loss of various solid materials; it is determined whether the current weight ratio is consistent with the preset weight ratio. If so, the discharge conveying structure 203 of the liquid weighing and discharging device 22 is controlled to maintain the current conveying parameters; if the weight ratio of the liquid material is too high, the conveying parameters of the discharge conveying structure 203 of the liquid weighing and discharging device 22 are reduced; if the weight ratio of the liquid material is too low, the conveying parameters of the discharge conveying structure 203 of the liquid weighing and discharging device 22 are increased; until the current weight ratio of the liquid material to the total solid material is consistent with the preset weight ratio.

[0072] In addition, during the process of feeding raw materials into the storage container 201, the weight can be collected by the weighing structure 202 and the amount of raw materials to be added in the storage container 201 can be calculated based on the weight. Furthermore, during the feeding process of the discharging conveyor structure 203, the remaining amount of raw materials in the storage container 201 can be calculated based on the weight. If the remaining amount is insufficient, the discharging conveyor structure 203 can be controlled to stop feeding and then feeding can be carried out to ensure the continuity of subsequent batching production.

[0073] Combination Figure 1 , Figure 3 and Figure 4 As shown, in order to better understand and implement the blending fertilizer equipment and method of the present invention, a specific embodiment is provided as follows:

[0074] The raw material feeding equipment feeds three solid materials into three storage hoppers 2011, and the liquid storage tank 2012 containing the liquid raw material is placed on the weighing platform 2022 by a forklift. The three solid materials are urea, potassium chloride and diammonium phosphate; the liquid raw material is a liquid fertilizer in the prior art; the preset weight ratio of the three solid raw materials is 2:2:1, and each ton of mixed solid raw materials contains 20 kg of liquid fertilizer, that is, the preset weight ratio of liquid fertilizer to total solid raw materials is 1:50.

[0075] Urea is laid flat on the ground via the discharge conveyor belts 2031 of the first and second solid weighing and discharging devices 21 and then onto the collection conveyor belt 111. Potassium chloride is laid flat on the ground via the discharge conveyor belts 2031 of the third solid weighing and discharging device 21 and then onto the collection conveyor belt 111. Diammonium phosphate is laid flat on the ground via the discharge conveyor belts 2031 of the fourth solid weighing and discharging device 21 and then onto the collection conveyor belt 111.

[0076] The control device adjusts the initial frequency of the drive motors 2032 of the first and second discharge conveyor belts 2031 to 40Hz, and controls the weighing sensors 2021 of the corresponding weighing structures 202 to collect and feedback the weight at a frequency of 0.5s, thereby calculating the weight loss of urea. The control device adjusts the initial frequency of the drive motor 2032 of the third discharge conveyor belt 2031 to 50Hz, and similarly controls the weighing sensors 2021 of the corresponding weighing structures 202 to collect and feedback the weight at a frequency of 0.5s, thereby calculating the weight loss of potassium chloride. Similarly, the control device controls the initial power frequency of the motor of the fourth discharge conveyor belt 2031 to 50Hz, and calculates the weight loss of diammonium phosphate.

[0077] The current weight ratio of various solid raw materials is calculated based on the weight loss of urea, potassium chloride, and diammonium phosphate. The frequency of multiple feeding belt drive motors 2032 is controlled based on the current weight ratio and the preset weight ratio of the three solid raw materials until the current weight ratio is consistent with its preset weight ratio.

[0078] The aggregate conveyor belt consists of two layers of urea, one layer of potassium chloride, and one layer of diammonium phosphate, arranged from bottom to top for initial mixing. The mixed solid raw materials then enter the spiral mixer conveyor 121 for further mixing. The conveying speed of the spiral mixer conveyor 121 is controlled to match the conveying speed of the aggregate conveyor belt. Simultaneously, the diaphragm pump 2035 is controlled to transport the liquid fertilizer to multiple spray heads, which then spray it onto the mixed solid raw materials in the spiral mixer conveyor 121. Similarly, the corresponding weighing structure 202 is controlled to collect the weight at a frequency of 0.5 seconds and provide feedback. The weight loss of the liquid fertilizer is then calculated based on the weight.

[0079] Specifically, the total weight loss of the three solid raw materials is calculated based on their weight loss; the current weight ratio of the liquid fertilizer to the total weight loss of the three solid raw materials is calculated based on the weight loss of the liquid fertilizer and the total weight loss of the three solid raw materials; then, based on the current weight ratio and the preset weight ratio of the liquid fertilizer to the total weight loss of the solid raw materials, the output flow rate of the diaphragm pump 2035 is controlled to control the total spray flow rate of the multiple spray heads until the current weight ratio matches its preset weight ratio.

[0080] The fertilizer, after being mixed by the spiral mixer conveyor 121, is output to the packaging equipment for packaging.

[0081] Verification revealed that the weight ratio deviation of each raw material in the blended fertilizer produced in this embodiment is ≤0.2%, and the production capacity of the blended fertilizer equipment of this invention covers a range of 10t / h to 150t / h.

[0082] The above descriptions are merely a few embodiments of the present invention. Those skilled in the art can make various modifications or variations to the embodiments of the present invention based on the content disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A blended fertilizer production equipment, characterized in that, Includes a mixing and conveying device and multiple weighing and discharging devices; The mixing and conveying device includes a material collection and conveying structure and a mixing and conveying structure. The discharge end of the material collection and conveying structure is located above the inlet end of the mixing and conveying structure. The plurality of weighing and discharging devices include a plurality of solid weighing and discharging devices arranged along the conveying direction of the material collection and conveying structure and a liquid weighing and discharging device extending into the mixing and conveying structure. Each of the weighing and feeding devices includes a storage container, a weighing structure, and a feeding and conveying structure. The storage container is mounted on a support via the weighing structure. The storage container of the solid weighing and feeding device feeds solid raw materials to the collecting and conveying structure via the feeding and conveying structure. The storage container of the liquid weighing and feeding device feeds liquid raw materials to the mixing and stirring structure via the feeding and conveying structure.

2. The blended fertilizer production equipment as described in claim 1, characterized in that, The material collection and conveying structure includes a material collection conveyor belt, and a plurality of the solid weighing and discharging devices are arranged along the conveying direction of the material collection conveyor belt; the material discharge conveying structure of the solid weighing and discharging device includes a material discharge conveyor belt, which is installed between the storage container of the solid weighing and discharging device and the material collection conveyor belt and is arranged parallel to the material collection conveyor belt.

3. The blended fertilizer production equipment as described in claim 2, characterized in that, The storage container of the solid weighing and discharging device is provided with a mounting frame, and the discharge conveyor belt of the solid weighing and discharging device is mounted on the mounting frame.

4. The blended fertilizer production equipment as described in claim 1, characterized in that, The discharge and conveying structure of the liquid weighing and discharging device includes multiple spray heads, which are connected to the storage container of the liquid weighing and discharging device. The mixing structure includes a spiral mixer conveyor, and a plurality of spray heads extend into the spiral mixer conveyor and are arranged along the conveying direction of the spiral mixer conveyor.

5. The blended fertilizer production equipment as described in claim 4, characterized in that, The spiral blades of the spiral mixer conveyor are provided with multiple mixing holes spaced apart along their spiral direction.

6. The blended fertilizer production equipment as described in claim 4, characterized in that, The spiral blades of the spiral mixer conveyor have multiple spiral segments connected along its spiral direction, and the pitch of the multiple spiral segments is arranged to decrease segment by segment.

7. The blended fertilizer production equipment as described in claim 1, characterized in that, The weighing structure includes multiple weighing sensors, which are arranged at intervals along the circumference of the storage container.

8. The blended fertilizer production equipment as described in claim 1, characterized in that, The blended fertilizer production equipment also includes a control device, which is electrically connected to the material collection and conveying structure, the mixing and blending structure, and the weighing and discharging structure of each of the weighing and discharging devices.

9. The blended fertilizer production equipment as described in claim 1, characterized in that, The blended fertilizer production equipment also includes a container and multiple feeding bins. The mixing conveying device and multiple weighing and discharging devices are installed inside the container, and the discharge end of the mixing conveying device extends out of the container. The multiple feeding bins are installed on the top of the container and are correspondingly arranged above the storage containers of the multiple solid weighing and discharging devices.

10. The blended fertilizer production equipment as described in claim 9, characterized in that, The blended fertilizer production equipment also includes a dust removal device, which is installed on the container.

11. A method for blending fertilizers, characterized in that, The method for producing blended fertilizer using the blended fertilizer production equipment as described in any one of claims 1 to 10 includes the following steps: According to the composition of the fertilizer to be produced, various raw materials are fed into the storage containers of the multiple weighing and feeding devices; Start the material collection and conveying structure; The mixing structure is activated; The material discharge conveying structures of multiple weighing and discharging devices are sequentially activated along the conveying direction of the mixing and conveying device, and the material discharge conveying structures of multiple weighing and discharging devices discharge multiple raw materials from multiple storage containers to the mixing and conveying device. The method for blending fertilizer further includes the following steps during the feeding process of the feeding and conveying structure of the multiple weighing and feeding devices: The multiple weighing structures collect weight at a preset sampling frequency; The weight loss of various raw materials is calculated based on the weights collected by the multiple weighing structures. Based on the weight loss of the various raw materials and the preset weight ratio of the various raw materials, the conveying parameters of the feeding and conveying structure of the multiple weighing and feeding devices are controlled.

12. The method for blending fertilizers as described in claim 11, characterized in that, During the material feeding process of the feeding and conveying structure of the multiple weighing and feeding devices, the blending fertilizer method further includes the following steps: Based on the weight loss of the various raw materials and the sampling frequency, the feeding speed of the feeding and conveying structure of the multiple weighing and feeding devices is calculated; The conveying speed of the collecting conveying structure is controlled according to the feeding speed of the feeding conveying structure of the plurality of weighing and feeding devices; The mixing speed of the mixing structure is controlled according to the feeding speed of the feeding and conveying structure of the multiple weighing and feeding devices.

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