An automated fertilizer production system

Abstract

An automatic fertilizer production system relates to the field of fertilizer production. It comprises 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# drum precision screening device, a particle polishing machine and a finished product packaging device connected in sequence; the rotary drum granulation production line comprises a batching device, a rotary drum granulation device, a 1# dryer, a 1# cooler, a drum coarse screening device, a 2# drum precision screening device, a 2# dryer, a 2# cooler, a drum fine screening device, a particle polishing machine and a finished product packaging device connected in sequence. The production system adopts the extrusion granulation production line and the rotary drum granulation production line for cooperation, meets the customized demand of multiple formulas, combines the first dust treatment line and the second dust treatment line, reduces pollution, realizes green production, improves resource utilization rate and saves manufacturing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fertilizer production, in particular to an automatic fertilizer production system. BACKGROUND

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

[0003] With the rapid development of modern agriculture, chemical fertilizer as the core guarantee of crop yield, its demand is increasing year by year. Compound fertilizer has become the mainstream product in the fertilizer market because of its balanced nutrients and efficient application. However, the core problem of current fertilizer production system is that the equipment coordination is poor, the segmented control leads to discontinuous production process, and the failure rate is high; the flexible production capacity is weak: it is difficult to quickly respond to the customized demand of small batch and multiple formula; the resource utilization rate is low: the energy consumption and pollution problem is prominent, which does not meet the green manufacturing trend. SUMMARY

[0004] The present application provides an automatic fertilizer production system, which aims to solve the above problems in the prior art.

[0005] The automatic fertilizer production system provided by the present application comprises:

[0006] Comprise:

[0007] The extrusion granulation production line, the rotary drum granulation production line, the first dust treatment line and the second dust treatment line;

[0008] The extrusion granulation production line is connected with the first dust treatment line, and the rotary drum granulation production line is connected with the first dust treatment line and the second dust treatment line;

[0009] The extrusion granulation production line comprises a batching device, an extrusion granulation device, a 1# roller precision screening device, a particle polishing machine and a finished product packaging device connected in sequence;

[0010] The mixing time of the batching device is 15-45 min, the extrusion pressure of the extrusion granulation device is 8-25 MPa, and the mesh number of the 1# roller precision screening device is 20-40 mesh;

[0011] The rotary drum granulation production line comprises, in sequence, a batching device, a rotary 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 granule polishing machine, and a finished product packaging device, wherein the drum coarse screening device is connected to a large-particle pulverizer;

[0012] The rotary drum granulation device has a steam pressure of 0.3-0.6 MPa, the 1# dryer has a temperature of 80-120℃, the 1# cooler has a cooling time of 10-30 min, the drum coarse screening device has a screen mesh of 4-10 meshes, the 2# drum fine screening device has a screen mesh of 20-40 meshes, the 2# dryer has a temperature of 60-100℃, the 2# cooler has a cooling time of 8-20 min, the drum fine screening device has a screen mesh of 40-60 meshes, and the large-particle pulverizer has a pulverized particle size of 1-3 mm.

[0013] The first dust treatment line comprises, in sequence, a pulse dust removal device, a gravity settling device, and a tail gas washing device.

[0014] The pulse dust removal device has a filtering air speed of 0.8-1.5 m / min, the gravity settling device has a settling chamber air speed of 0.2-0.5 m / s, the tail gas washing device has a liquid-gas ratio of 1.5-3.0 L / m³, and the tail gas washing device adopts a two-stage spraying system, wherein the first-stage spraying has a pH value of 6.5-7.5, the second-stage spraying has a pH value of 7.5-8.5, and the washing liquid has a recycling use cycle of 12-24 hours.

[0015] The second dust treatment line comprises a drying cyclone online dust collector and a cooling cyclone online dust collector, wherein the drying cyclone online dust collector and the cooling cyclone online dust collector are both connected to the gravity settling device, and the gravity settling device is connected to the tail gas washing device.

[0016] The drying cyclone online dust collector has an inlet air speed of 15-25 m / s, and the cooling cyclone online dust collector has an inlet air speed of 12-20 m / s.

[0017] Further, the batching device is used to batch the chemical fertilizer by weight, and after batching, the chemical fertilizer is conveyed to the extrusion granulation device for extrusion granulation, the extrusion granulated chemical fertilizer is conveyed to the 1# drum fine screening device for screening, the screened chemical fertilizer is conveyed to the granule polishing machine, and the polished chemical fertilizer is conveyed to the finished product packaging device.

[0018] Further, 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 conveyed to the pulse dust removal device, the qualified chemical fertilizer granules screened by the 1# drum fine screening device are conveyed to the granule polishing machine, and the polished chemical fertilizer is conveyed 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 re-extrusion granulation.

[0019] Further, the 1# dryer is connected with a 1# hot blast furnace, and the 2# dryer is connected with a 2# hot blast furnace.

[0020] Further, the drum granulator is connected with a boiler.

[0021] Further, the batching device is used for batching fertilizers by weight, and after the batching is completed, the fertilizers are transported to the drum granulator, the granulated fertilizer particles are transported to the 1# dryer for drying, the dried fertilizer particles are transported to the 1# cooler, and after being cooled, the fertilizer particles are transported to the drum coarse screening device, the coarsely screened fertilizer particles are transported to the 2# drum fine screening device, the finely screened fertilizer particles are transported to the 2# dryer and the 2# cooler after being dried and cooled, and then the fertilizer particles are transported to the drum fine screening device, and after being finely screened, the fertilizer particles are transported to the particle polishing machine and then to the finished product packaging device.

[0022] Further, after being screened by the drum coarse screening device, large-particle fertilizers, dust, fine powder and small-particle fertilizers are obtained, the large-particle fertilizers are transported to the large-particle pulverizer, the large-particle fertilizers are returned to the drum granulator for re-granulation after being pulverized by the large-particle pulverizer, the dust is transported to the pulse dust removal device, and the fine powder and the small-particle fertilizers are transported to the 2# drum fine screening device; after being screened by the 2# drum fine screening device, dust, fine powder and small-particle fertilizers are obtained, the dust is transported to the pulse dust removal device, the fine powder is returned to the drum granulator for re-granulation, and the small-particle fertilizers are transported to the 2# dryer.

[0023] Further, after being further finely screened by the drum fine screening device, finished product fertilizer particles and undersize small particles are obtained, the finished product fertilizer particles are transported to the particle polishing machine, and then to the finished product packaging device after being polished by the particle polishing machine, and the undersize small particles are transported to the particle polishing machine, and then to the finished product packaging device after being polished by the particle polishing machine.

[0024] Further, the 1# dryer and the 2# dryer are connected with the drying cyclone online dust collector, the 1# cooler and the 2# cooler are connected with the cooling cyclone online dust collector, the dust generated by the 1# dryer and the 2# dryer is collected by the drying cyclone online dust collector and then transported to the gravity settling device, the dust generated by the 1# cooler and the 2# cooler is collected by the cooling cyclone online dust collector and then transported to the gravity settling device, and the large-particle dust is collected by the gravity settling device, and the small-particle dust enters the tail gas washing device.

[0025] The application has the advantages of high equipment synergy, strong flexible production capacity, effective utilization of resources, low manufacturing cost and high production efficiency.

[0026] The extrusion granulation production line and the rotary drum granulation production line are combined together in the application, the extrusion granulation production line can quickly respond to the customized demand of small batch and multiple formulas, small batch production is carried out by using the extrusion granulation production line, and large batch production is carried out by using the rotary drum granulation production line, the extrusion granulation production line and the rotary drum granulation production line both use the batching device to meet the customized demand 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 the production process continuity; the first dust treatment line and the second dust treatment line treat the dust of the whole production system, reduce pollution, and realize green production; at the same time, the fine powder after screening and the unqualified large particle material are recycled and returned to be granulated again in the production system, the resource utilization rate is improved, and the manufacturing cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a principle structure diagram of the automatic fertilizer production system of the application;

[0028] Figure 2 It is a principle structure diagram of the extrusion granulation production line of the application;

[0029] Figure 3 It is a principle structure diagram of the rotary drum granulation production line of the application;

[0030] Figure 4 It is a principle structure diagram of the first dust treatment line of the application;

[0031] Figure 5 It is a principle structure diagram of the second dust treatment line of the application. DETAILED DESCRIPTION

[0032] The content of the application will be further described below in combination with examples. The examples are not used to limit the protection scope of the application. The modification or replacement of the method, step or condition of the application without departing from the essence of the technical scheme of the application all belong to the range of the application.

[0033] If not specifically indicated, the equipment, device and process method used in the examples are all conventional equipment, device and process method known by those skilled in the art.

[0034] The specific implementation of the application will be described below in combination with a preferred embodiment of the application:

[0035] As Figure 1 shown in the overall structure schematic diagram of an embodiment of the application, the embodiment includes an extrusion granulation production line, a rotary drum granulation production line, a first dust treatment line and a second dust treatment line;

[0036] The extrusion granulation production line is connected with the first dust treatment line, and the drum granulation production line is connected with 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 in the whole production system, and discharge after treatment by a pulse dust removal device, a gravity settling device and a tail gas washing device, the filtering air speed of the pulse dust removal device is controlled at 0.8-1.5 m / min, the wind speed of the settling chamber of the gravity settling device is controlled at 0.2-0.5 m / s, the liquid-gas ratio of the tail gas washing device is 1.5-3.0 L / m3, the tail gas washing device adopts a two-stage spraying system, the pH value of the first-stage spraying is 6.5-7.5, the pH value of the second-stage spraying is 7.5-8.5, and the washing liquid recycling period is 12-24 hours;

[0037] As Figure 2 , the embodiment includes an extrusion granulation production line, which includes a batching device, an extrusion granulation device, a 1# drum precision screening device, a particle polishing machine and a finished product packaging device connected in sequence; the batching device is used for batching fertilizers by weight, the batching time of the batching device is 15-45 min, and the fertilizers are conveyed to the extrusion granulation device for extrusion granulation after batching is completed, the extrusion pressure is 8-25 MPa, the fertilizers after extrusion granulation are conveyed to the 1# drum precision screening device for screening, the screen mesh size is 20-40 meshes, and the fertilizers are conveyed to the particle polishing machine after screening is completed, and then conveyed to the finished product packaging device for packaging and then stored in the warehouse; wherein, the 1# drum precision screening device is connected with a pulse dust removal device, the dust generated by the 1# drum precision screening device is conveyed to the pulse dust removal device, the qualified fertilizer particles after precision screening of the 1# drum precision screening device are sent to the particle polishing machine, and then conveyed to the finished product packaging device for packaging after the particle polishing machine, and the fine powder after precision screening of the 1# drum precision screening device is returned to the extrusion granulation device for re-extrusion granulation, recycling and re-granulation, thereby improving the resource utilization rate and saving the manufacturing cost;

[0038] As 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 the large particle crusher, the 1# dryer is connected to the 1# hot air furnace, the 2# dryer is connected to the 2# hot air furnace, and the drum granulation device is connected to the boiler; the batching device is used to batch the fertilizer according to weight, and after the batching is completed, it is transported to the drum granulation device with a steam pressure of 0.3-0.6MPa. The granulated fertilizer particles are transported to the 1# dryer for drying at a drying temperature of 80-120°C. The dried fertilizer particles are transported to the 1# cooler for a cooling time of 10-30min. After cooling, they are transported to the drum coarse screening device with a screen mesh of 4-10 meshes. The coarsely screened fertilizer particles are transported to the drum The granules are sent to the 2# drum fine screening device with a mesh size of 20-40. The finely screened fertilizer granules are then passed through the 2# dryer at a temperature of 60-100°C and the 2# cooler for a cooling time of 8-20 minutes. After drying and cooling, they are transported to the drum fine screening device with a mesh size of 40-60. After fine screening, they are transported to the particle polishing machine and then to the finished product packaging device. The drum coarse screening device screens the granules to obtain large-particle fertilizer, dust, fine powder and small-particle fertilizer. 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. 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. The 2# drum fine screening device screens the granules to obtain dust, fine powder and small-particle fertilizer. 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. The small-particle fertilizer is transported to the 2# dryer.

[0039] 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 5The overall structure of the embodiment of the present application is shown in a schematic diagram, which 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 a tail gas washing device; a 1# dryer and a 2# dryer are both connected to the drying cyclone online dust collector, the inlet air speed of the drying cyclone online dust collector is 15-25 m / s, a 1# cooler and a 2# cooler are both connected to the cooling cyclone online dust collector, the inlet air speed of the cooling cyclone online dust collector is 12-20 m / s, the dust generated by the 1# dryer and the 2# dryer is collected by the drying cyclone online dust collector and then transported to the gravity settling device, the dust generated by the 1# cooler and the 2# cooler is collected by the cooling cyclone online dust collector and then transported to the gravity settling device, and the large-particle dust is collected by the gravity settling device, and the small-particle dust enters the tail gas washing device.

[0040] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any modification, equivalent replacement and improvement made by any person skilled in the art within the technical range disclosed by the present application, as long as it is within the spirit and principle of the present application, should be covered within the protection scope of the present application.

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 No. 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 15-45 minutes, the extrusion pressure of the extrusion granulation device is 8-25 MPa, and the mesh size of the 1# drum fine screening device is 20-40 meshes; The drum granulation production line includes a batching device, a drum granulation device, a No. 1 dryer, a No. 1 cooler, a drum coarse screen device, a No. 2 drum fine screen device, a No. 2 dryer, a No. 2 cooler, a drum fine screen device, a particle polisher, and a finished product packaging device, which are connected in sequence. The drum coarse screen 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 size of the drum coarse screening device is 4-10 mesh, the mesh size of the 2# drum fine screening 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 size of the drum fine screening 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 sedimentation device, and an exhaust gas scrubbing 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 scrubber has a liquid-to-gas ratio of 1.5-3.0L / m³, and the tail gas scrubber uses a two-stage spray system with a first-stage spray pH value of 6.5-7.5 and a second-stage spray pH value of 7.5-8.

5. The scrubbing liquid is recycled for 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, which is connected to an exhaust gas scrubber; 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; 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.

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 2, characterized in that 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. After passing through the particle polishing machine, they are transported to the finished product packaging device for packaging. 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 3, 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 4, characterized in that , the rotary drum granulation device is connected to the boiler.

6. An automated fertilizer production system according to claim 5, characterized in that 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 dried fertilizer particles 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 then 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. After passing through the particle polisher, they are transported to the finished product packaging device.

7. An automated fertilizer production system according to claim 6, 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 granulation 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 granulation device for re-granulation, and the small-particle fertilizer is transported to the 2# dryer.

8. An automated fertilizer production system according to claim 7, characterized in that The drum fine screening device further 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 completion of 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 completion of packaging.

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