Automatic fertilizer production system

Abstract

An automatic fertilizer production system relates to the field of fertilizer production. Comprising an extrusion granulation production line, a rotary drum granulation production line, a first dust treatment line and a second dust treatment line, the extrusion granulation production line comprises a batching device, an extrusion granulation device, a 1 # roller fine screening device, a particle polishing machine and a finished product packaging device which are connected in sequence; the drum granulation production line comprises a batching device, a drum granulation device, a 1 # dryer, a 1 # cooler, a roller coarse screening device, a 2 # roller fine screening device, a 2 # dryer, a 2 # cooler, a roller fine screening device, a particle polishing machine and a finished product packaging device which are connected in sequence. The production system has the advantages that the extrusion granulation production line and the rotary drum granulation production line are used in cooperation, the customization requirement of multiple formulas is met, the first dust treatment line and the second dust treatment line are combined, pollution is reduced, green production is achieved, the resource utilization rate is increased, and the manufacturing cost is saved.

Description

Technical Field

[0001] The invention relates to the field of fertilizer production, in particular to an automated fertilizer production system. Background Art

[0002] Compound fertilizer is a chemical fertilizer containing two or more main nutrient elements, usually including nitrogen (N), phosphorus (P), potassium (K), and may also contain calcium, magnesium, sulfur, trace elements, etc. Compared with single fertilizers (such as urea and superphosphate), compound fertilizers have the characteristics of balanced nutrients, convenient application, and high utilization rate, and are widely used in agricultural production.

[0003] With the rapid development of modern agriculture, fertilizers are the core guarantee for increasing crop yields, and their demand is rising year by year. Compound fertilizers have become the mainstream products in the fertilizer market due to their balanced nutrients and efficient application. However, the core problems of the current fertilizer production system are: poor equipment coordination, segmented control leading to discontinuous production processes and high failure rates; weak flexible production capacity: it is difficult to quickly respond to small batches and multiple formulations of customized needs; low resource utilization: energy consumption and pollution problems are prominent, which does not conform to the trend of green manufacturing. Summary of the invention

[0004] The present invention provides an automated fertilizer production system, aiming to solve the above-mentioned problems in the prior art.

[0005] The present invention provides an automated fertilizer production system, comprising: include: Extrusion granulation production line, drum granulation production line, first dust treatment line and second dust treatment line; The extrusion granulation production line is connected to the first dust treatment line, and the drum granulation production line is connected to the first dust treatment line and the second dust treatment line; The extrusion granulation production line includes a batching device, an extrusion granulation device, a 1# drum fine screening device, a particle polishing machine, and a finished product packaging device which are connected in sequence; The mixing time of the batching device is 15-45min, the extrusion pressure of the extrusion granulation device is 8-25MPa, and the mesh number of the 1# drum fine screening device is 20-40 mesh; The drum granulation production line comprises a batching device, a drum granulation device, a 1# dryer, a 1# cooler, a drum coarse screening device, a 2# drum fine screening device, a 2# dryer, a 2# cooler, a drum fine screening device, a particle polisher, and a finished product packaging device, which are connected in sequence, and the drum coarse screening device is connected to a large particle crusher; The steam pressure of the drum granulation device is 0.3-0.6MPa, the temperature of the 1# dryer is 80-120℃, the cooling time of the 1# cooler is 10-30min, the mesh number of the drum coarse screen device is 4-10 mesh, the mesh number of the 2# drum fine screen device is 20-40 mesh, the temperature of the 2# dryer is 60-100℃, the cooling time of the 2# cooler is 8-20min, the mesh number of the drum fine screen device is 40-60 mesh, and the particle size of the large particle crusher is 1-3mm; The first dust treatment line includes a pulse dust removal device, a gravity settling device, and an exhaust gas washing device connected in sequence; The pulse dust removal device has a filtration wind speed of 0.8-1.5m / min, the gravity sedimentation device has a settling chamber wind speed of 0.2-0.5m / s, the tail gas washing device has a liquid-gas ratio of 1.5-3.0L / m³, and the tail gas washing device adopts a two-stage spray system, the first-stage spray pH value is 6.5-7.5, the second-stage spray pH value is 7.5-8.5, and the washing liquid circulation cycle is 12-24 hours; The second dust treatment line includes a drying cyclone online dust collector and a cooling cyclone online dust collector, both of which are connected to a gravity settling device, and the gravity settling device is connected to an exhaust gas scrubbing device; The inlet wind speed of the drying cyclone online dust collector is 15-25m / s, and the inlet wind speed of the cooling cyclone online dust collector is 12-20m / s.

[0006] Furthermore, the batching device is used to batch the fertilizer by weight. After batching, the fertilizer is transported to the extrusion granulation device for extrusion granulation. The fertilizer after extrusion granulation is transported to the 1# drum fine screening device for screening. After screening, it is transported to the particle polisher and then transported to the finished product packaging device through the particle polisher.

[0007] Furthermore, the 1# drum fine screening device is connected to the pulse dust removal device, the dust generated by the 1# drum fine screening device is transported to the pulse dust removal device, the qualified fertilizer particles screened by the 1# drum fine screening device are sent to the particle polishing machine, and after passing through the particle polishing machine, they are transported to the finished product packaging device for packaging, and the fine powder screened by the 1# drum fine screening device is returned to the extrusion granulation device for extrusion granulation again.

[0008] Furthermore, the 1# dryer is connected to the 1# hot air furnace, and the 2# dryer is connected to the 2# hot air furnace.

[0009] Furthermore, the rotary drum granulation device is connected to a boiler.

[0010] Furthermore, the batching device is used to batch the fertilizer by weight. After batching, it is transported to the drum granulation device. The fertilizer particles after granulation are transported to the 1# dryer for drying. The fertilizer particles after drying are transported to the 1# cooler. After cooling, they are transported to the drum coarse screening device. The fertilizer particles after coarse screening are transported to the 2# drum fine screening device. The fertilizer particles after fine screening pass through the 2# dryer and the 2# cooler. After drying and cooling, they are transported to the drum fine screening device. After fine screening, they are transported to the particle polisher, and then transported to the finished product packaging device through the particle polisher.

[0011] Furthermore, after screening by the drum coarse screening device, large-particle fertilizer, dust, fine powder and small-particle fertilizer are obtained, and the large-particle fertilizer is transported to the large-particle crusher. After being crushed by the large-particle crusher, the large-particle fertilizer is returned to the drum granulating device for re-granulation, and the dust is transported to the pulse dust removal device, and the fine powder and small-particle fertilizer are transported to the 2# drum fine screening device; after screening by the 2# drum fine screening device, dust, fine powder and small-particle fertilizer are obtained, and the dust is transported to the pulse dust removal device, and the fine powder is transported back to the drum granulating device for re-granulation, and the small-particle fertilizer is transported to the 2# dryer.

[0012] Furthermore, the drum fine screening device further fine screens the small-particle fertilizer to obtain finished fertilizer particles and small particles under the screen. The finished fertilizer particles are transported to the particle polisher, and after passing through the particle polisher, they are transported to the finished product packaging device for packaging. The small particles under the screen are transported to the particle polisher, and after passing through the particle polisher, they are transported to the finished product packaging device for packaging.

[0013] Furthermore, the 1# dryer and 2# dryer are both connected to the drying cyclone online dust collector, and the 1# cooler and 2# cooler are both connected to the cooling cyclone online dust collector. The dust generated by the 1# dryer and 2# dryer is collected by the drying cyclone online dust collector and then transported to the gravity sedimentation device. The dust generated by the 1# cooler and 2# cooler is collected by the cooling cyclone online dust collector and then transported to the gravity sedimentation device. Large particles of dust are settled and collected in the gravity sedimentation device, and small particles of dust enter the exhaust gas washing device.

[0014] The advantages of the present invention are high equipment coordination, strong flexible production capacity, effective use of resources, saving manufacturing costs, and high production efficiency. The details are as follows: The present invention combines an extrusion granulation production line and a rotary drum granulation production line together. The extrusion granulation production line can quickly respond to the customized needs of small batches and multiple formulas. The small batch is produced by the extrusion granulation production line, and the large batch is produced by the rotary drum granulation production line. Both the extrusion granulation production line and the rotary drum granulation production line adopt a batching device to meet the customized needs of multiple formulas. The switching use of the extrusion granulation production line and the rotary drum granulation production line further improves the equipment synergy and makes the production process coherent. The first dust treatment line and the second dust treatment line treat the dust of the entire production system, reduce pollution, and realize green production. At the same time, the screened fine powder and unqualified large particles in the production system are recovered and returned for re-granulation, which improves resource utilization and saves manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a principle structure diagram of an automated fertilizer production system of the present invention; Figure 2 It is the principle structure diagram of the extrusion granulation production line of the present invention; Figure 3 It is the principle structure diagram of the rotary drum granulation production line of the present invention; Figure 4 This is a schematic diagram of the first dust treatment line of the present invention; Figure 5 This is a schematic diagram of the second dust treatment line of the present invention. DETAILED DESCRIPTION

[0016] The content of the present invention is further described below in conjunction with the examples. The examples are not intended to limit the scope of protection of the present invention. Without departing from the essence of the technical solution of the present invention, modifications or substitutions made to the method, steps or conditions of the present invention all belong to the scope of the present invention.

[0017] Unless otherwise specified, the equipment, devices and process methods used in the examples are conventional equipment, devices and process methods well known to those of ordinary skill in the art.

[0018] The specific implementation of the present invention will be described below with a preferred embodiment of the present invention: like Figure 1 , as shown in the overall structural schematic diagram of an embodiment of the present invention, the embodiment includes an extrusion granulation production line, a drum granulation production line, a first dust treatment line and a second dust treatment line; The extrusion granulation production line is connected to the first dust treatment line, and the drum granulation production line is connected to the first dust treatment line and the second dust treatment line; the first dust treatment line and the second dust treatment line can collect the dust generated during the production process of the entire production system, and discharge it after being treated by the pulse dust removal device, gravity settling device and tail gas washing device to meet the standards. The pulse dust removal device filtration wind speed is controlled at 0.8-1.5m / min, the gravity settling device settling chamber wind speed is controlled at 0.2-0.5m / s, the tail gas washing device liquid-gas ratio is 1.5-3.0L / m³, and the tail gas washing device adopts a two-stage spraying system, the first-stage spraying pH value is 6.5-7.5, the second-stage spraying pH value is 7.5-8.5, and the washing liquid recycling cycle is 12-24 hours; like Figure 2 As shown in the overall structural diagram of an embodiment of the present invention, the embodiment includes an extrusion granulation production line, which includes a batching device, an extrusion granulation device, a 1# drum fine screening device, a particle polishing machine, and a finished product packaging device connected in sequence; the batching device is used to batch the fertilizer by weight, and the mixing time of the batching device is 15-45min. After the batching is completed, it is transported to the extrusion granulation device for extrusion granulation, and the extrusion pressure is 8-25MPa. The fertilizer after extrusion granulation is transported to the 1# drum fine screening device for screening, and the mesh number of the screen is 20-40 meshes. After screening, the finished products are transported to the particle polisher, and then transported to the finished product packaging device after packaging and storage; wherein, the 1# drum fine screening device is connected to the pulse dust removal device, and the dust generated by the 1# drum fine screening device is transported to the pulse dust removal device, and the qualified fertilizer particles screened by the 1# drum fine screening device are sent to the particle polisher, and then transported to the finished product packaging device after the particle polisher to complete packaging, and the fine powder screened by the 1# drum fine screening device is returned to the extrusion granulation device for extrusion granulation again, and recycled granulation is performed, thereby improving resource utilization and saving manufacturing costs; like Figure 3As shown in the overall structural diagram of an embodiment of the present invention, the embodiment includes a drum granulation production line including a batching device, a drum granulation device, a 1# dryer, a 1# cooler, a drum coarse screening device, a 2# drum fine screening device, a 2# dryer, a 2# cooler, a drum fine screening device, a particle polisher, and a finished product packaging device connected in sequence. The drum coarse screening device is connected to a large particle crusher, the 1# dryer is connected to a 1# hot air furnace, the 2# dryer is connected to a 2# hot air furnace, and the drum granulation device is connected to a boiler; the batching device is used to batch the fertilizer by weight, and after the batching is completed, it is transported to the drum granulation device, the steam pressure is 0.3-0.6MPa, the granulated fertilizer particles are transported to the 1# dryer for drying, the drying temperature is 80-120°C, the dried fertilizer particles are transported to the 1# cooler, the cooling time is 10-30min, and after cooling, they are transported to the drum coarse screening device, the mesh size is 4-10 mesh, and the coarsely screened fertilizer particles are transported To the 2# drum fine screening device, the mesh number is 20-40 meshes, and the finely screened fertilizer particles are then passed through the 2# dryer at a temperature of 60-100°C, the 2# cooler, and the cooling time is 8-20min. After drying and cooling, they are transported to the drum fine screening device with a mesh number of 40-60 meshes. After fine screening, they are transported to the particle polisher, and then transported to the finished product packaging device through the particle polisher; wherein, after screening by the drum coarse screening device, large-particle fertilizer, dust, fine powder and small-particle fertilizer are obtained, and the large-particle fertilizer is transported to the large-particle crusher with a crushing particle size of 1-3mm. After being crushed by the large-particle crusher, the large-particle fertilizer is returned to the drum granulation device for re-granulation, and the dust is transported to the pulse dust removal device, and the fine powder and small-particle fertilizer are transported to the 2# drum fine screening device; after screening by the 2# drum fine screening device, dust, fine powder and small-particle fertilizer are obtained, and the dust is transported to the pulse dust removal device, and the fine powder is transported back to the drum granulation device for re-granulation, and the small-particle fertilizer is transported to the 2# dryer; like Figure 4 , as shown in the overall structural diagram of an embodiment of the present invention, the embodiment includes a pulse dust removal device, a gravity sedimentation device, and an exhaust gas washing device connected in sequence; Figure 5As shown in the overall structural schematic diagram of an embodiment of the present invention, the embodiment includes a drying cyclone online dust collector and a cooling cyclone online dust collector. The drying cyclone online dust collector and the cooling cyclone online dust collector are both connected to a gravity settling device, and the gravity settling device is connected to an exhaust gas washing device; 1# dryer and 2# dryer are both connected to the drying cyclone online dust collector, and the inlet wind speed of the drying cyclone online dust collector is 15-25m / s; 1# cooler and 2# cooler are both connected to the cooling cyclone online dust collector, and the inlet wind speed of the cooling cyclone online dust collector is 12-20m / s; the dust generated by 1# dryer and 2# dryer is collected by the drying cyclone online dust collector and then transported to the gravity settling device; the dust generated by 1# cooler and 2# cooler is collected by the cooling cyclone online dust collector and then transported to the gravity settling device; large particles of dust are settled and collected in the gravity settling device, and small particles of dust enter the exhaust gas washing device.

[0019] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. An automated fertilizer production system, characterized in that: include: Extrusion granulation production line, drum granulation production line, first dust treatment line and second dust treatment line; The extrusion granulation production line is connected to the first dust treatment line, and the drum granulation production line is connected to the first dust treatment line and the second dust treatment line; The extrusion granulation production line includes a batching device, an extrusion granulation device, a 1# drum fine screening device, a particle polishing machine, and a finished product packaging device which are connected in sequence; The mixing time of the batching device is 15-45min, the extrusion pressure of the extrusion granulation device is 8-25MPa, and the mesh number of the 1# drum fine screening device is 20-40 mesh; The drum granulation production line comprises a batching device, a drum granulation device, a 1# dryer, a 1# cooler, a drum coarse screening device, a 2# drum fine screening device, a 2# dryer, a 2# cooler, a drum fine screening device, a particle polisher, and a finished product packaging device, which are connected in sequence, and the drum coarse screening device is connected to a large particle crusher; The steam pressure of the drum granulation device is 0.3-0.6MPa, the temperature of the 1# dryer is 80-120℃, the cooling time of the 1# cooler is 10-30min, the mesh number of the drum coarse screen device is 4-10 mesh, the mesh number of the 2# drum fine screen device is 20-40 mesh, the temperature of the 2# dryer is 60-100℃, the cooling time of the 2# cooler is 8-20min, the mesh number of the drum fine screen device is 40-60 mesh, and the particle size of the large particle crusher is 1-3mm; The first dust treatment line includes a pulse dust removal device, a gravity settling device, and an exhaust gas washing device connected in sequence; The pulse dust removal device has a filtration wind speed of 0.8-1.5m / min, the gravity sedimentation device has a settling chamber wind speed of 0.2-0.5m / s, the tail gas washing device has a liquid-gas ratio of 1.5-3.0L / m³, and the tail gas washing device adopts a two-stage spray system, the first-stage spray pH value is 6.5-7.5, the second-stage spray pH value is 7.5-8.5, and the washing liquid circulation cycle is 12-24 hours; The second dust treatment line includes a drying cyclone online dust collector and a cooling cyclone online dust collector, both of which are connected to a gravity settling device, and the gravity settling device is connected to an exhaust gas scrubbing device; The inlet wind speed of the drying cyclone online dust collector is 15-25m / s, and the inlet wind speed of the cooling cyclone online dust collector is 12-20m / s.

2. An automated fertilizer production system according to claim 1, characterized in that The batching device is used to batch the fertilizer by weight. After batching, it is transported to the extrusion granulation device for extrusion granulation. The fertilizer after extrusion granulation is transported to the 1# drum fine screening device for screening. After screening, it is transported to the particle polishing machine and then transported to the finished product packaging device through the particle polishing machine.

3. An automated fertilizer production system according to claim 1, characterized in that The 1# drum fine screening device is connected to the pulse dust removal device, and the dust generated by the 1# drum fine screening device is transported to the pulse dust removal device. The qualified fertilizer particles screened by the 1# drum fine screening device are sent to the particle polishing machine, and then transported to the finished product packaging device for packaging after passing through the particle polishing machine. The fine powder screened by the 1# drum fine screening device is returned to the extrusion granulation device for further extrusion granulation.

4. An automated fertilizer production system according to claim 1, characterized in that The 1# dryer is connected to the 1# hot air furnace, and the 2# dryer is connected to the 2# hot air furnace.

5. An automated fertilizer production system according to claim 1, characterized in that , the rotary drum granulating device is connected to the boiler.

6. An automated fertilizer production system according to claim 1, characterized in that The batching device is used to batch the fertilizer by weight. After batching, it is transported to the drum granulating device. The fertilizer particles after granulation are transported to the 1# dryer for drying. The fertilizer particles after drying are transported to the 1# cooler. After cooling, they are transported to the drum coarse screening device. The fertilizer particles after coarse screening are transported to the 2# drum fine screening device. The fertilizer particles after fine screening pass through the 2# dryer and the 2# cooler. After drying and cooling, they are transported to the drum fine screening device. After fine screening, they are transported to the particle polishing machine. After passing through the particle polishing machine, they are transported to the finished product packaging device.

7. An automated fertilizer production system according to claim 1, characterized in that After screening by the drum coarse screening device, large-particle fertilizer, dust, fine powder and small-particle fertilizer are obtained. The large-particle fertilizer is transported to the large-particle crusher. After being crushed by the large-particle crusher, the large-particle fertilizer is returned to the drum granulating device for re-granulation. The dust is transported to the pulse dust removal device, and the fine powder and small-particle fertilizer are transported to the 2# drum fine screening device; after screening by the 2# drum fine screening device, dust, fine powder and small-particle fertilizer are obtained. The dust is transported to the pulse dust removal device, and the fine powder is transported back to the drum granulating device for re-granulation, and the small-particle fertilizer is transported to the 2# dryer.

8. An automated fertilizer production system according to claim 1, characterized in that The drum fine screening device further fine screens the small-particle fertilizer to obtain finished fertilizer particles and small particles under the screen. The finished fertilizer particles are transported to the particle polishing machine, and after passing through the particle polishing machine, they are transported to the finished product packaging device for packaging. The small particles under the screen are transported to the particle polishing machine, and after passing through the particle polishing machine, they are transported to the finished product packaging device for packaging.

9. An automated fertilizer production system according to claim 1, characterized in that The 1# dryer and 2# dryer are both connected to the drying cyclone online dust collector, and the 1# cooler and 2# cooler are both connected to the cooling cyclone online dust collector. The dust generated by the 1# dryer and 2# dryer is collected by the drying cyclone online dust collector and then transported to the gravity sedimentation device. The dust generated by the 1# cooler and 2# cooler is collected by the cooling cyclone online dust collector and then transported to the gravity sedimentation device. Large particles of dust are settled and collected in the gravity sedimentation device, and small particles of dust enter the exhaust gas washing device.

Images