System for recovering intermediate material of compound fertilizer formula on line

Abstract

The utility model belongs to a system for recovering a compound fertilizer formula intermediate material on line. Comprising a compound fertilizer coating machine and a compound fertilizer packaging machine in a compound fertilizer production system, a first three-way change-over valve is arranged between the compound fertilizer coating machine and the compound fertilizer packaging machine, and the third end of the first three-way change-over valve is connected with a compound fertilizer quantitative adding unit through a compound fertilizer cache unit; the method has the advantages that the process design is reasonable, the packaging procedure cannot be performed during quantitative adding or returning, and the energy consumption and the cost are reduced on the premise of ensuring the quality of a compound fertilizer product.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of compound fertilizer production, specifically is a kind of system of on-line recovery compound fertilizer formula change intermediate material. BACKGROUND

[0002] In the production process of compound fertilizer, there is the production behavior of frequently changing formula, according to the statistics of major compound fertilizer enterprises, it is changed once every 2-4 days on average, although production scheduling adjusts formula change as far as possible to make formula close to, to reduce the generation of intermediate material, but each time formula changes, because compound fertilizer production system does not stop, the intermediate material retained in system (high tower mixing tank, rotary drum granulator, dryer, cooler etc.), up to 60 tons / time, to ensure the product quality of compound fertilizer, this part of material is usually packaged and transported to warehouse or raw material workshop as return material, not only affect yield, but also waste the energy of production system, increase cost. With a set of 200,000 tons / year production device, according to 3 times formula change per year, 300 days of production are counted, 6000 tons of intermediate material will be produced every year, and each compound fertilizer enterprise processes 200 yuan / ton, recovery will generate 120 yuan / year cost, cause a large amount of energy to be wasted.

[0003] Therefore, how to solve the technical problem of intermediate material generated in compound fertilizer formula change at low cost has become a technical problem to be solved by compound fertilizer enterprises. UTILITY MODEL CONTENT

[0004] In order to make up for the above shortcomings, the utility model provides a kind of system of on-line recovery compound fertilizer formula change intermediate material to solve the technical problems existing in prior art.

[0005] The technical scheme adopted by the utility model to solve its technical problems is:

[0006] A kind of system of on-line recovery compound fertilizer formula change intermediate material, the system includes compound fertilizer coating machine and compound fertilizer packaging machine in compound fertilizer production system, first three-way switch valve is equipped between compound fertilizer coating machine and compound fertilizer packaging machine, and the third end of first three-way switch valve is connected with compound fertilizer quantitative adding unit by compound fertilizer buffer unit.

[0007] The utility model discloses beneficial effect is: the utility model discloses can be applicable to the use when composite fertilizer production system conversion formula or the use when composite fertilizer packaging machine needs maintenance, by setting first three -way switch valve at the export end of composite fertilizer coating machine can satisfy when normal composite fertilizer production sends composite fertilizer granule to composite fertilizer packaging machine and realizes normal production, when changing formula or composite fertilizer packaging machine appears the failure, under the premise of composite fertilizer system not stopping, through first three -way switch valve, the fertilizer from composite fertilizer coating machine is temporarily stored to composite fertilizer buffer unit, and in the subsequent process, through calculating the nutrient of rear fertilizer, uses composite fertilizer quantitative adding unit to realize quantitative addition to the fertilizer from composite fertilizer coating machine to reach under the premise of guaranteeing composite fertilizer quality, to the effective reuse of intermediate material to reduce energy consumption and reduce the cost feature.

[0008] Further, the composite fertilizer buffer unit comprises a large-volume bin, an inlet of the large-volume bin is connected with a third end of the first three-way switch valve, and a discharge outlet of the large-volume bin is connected with a discharge valve.

[0009] Further, the large-volume bin has a volume of 65-110 cubic meters.

[0010] Further, the composite fertilizer quantitative adding unit comprises a metering belt scale arranged at least at a bottom of the discharge valve.

[0011] Further, the composite fertilizer quantitative adding unit further comprises a bucket elevator arranged between the composite fertilizer coating machine and the first three-way switch valve, and lower inlets of the bucket elevator are respectively connected with an outlet of the metering belt scale and an outlet of the composite fertilizer coating machine.

[0012] Further, a second three-way valve is arranged between the bottom of the discharge valve and the inlet of the metering belt scale, and a third end of the second three-way valve is connected with a return belt.

[0013] The system for recycling intermediate material of compound fertilizer formula on line prepared according to the technical scheme can avoid the subsequent packaging process of the intermediate material by arranging the first three-way valve between the compound fertilizer coating machine and the compound fertilizer packaging machine, and can realize the temporary storage of the intermediate material and the quantitative addition of the subsequent compound fertilizer after the formula conversion, so as to realize the characteristics of reducing energy consumption and cost under the premise of ensuring the quality of the compound fertilizer; the utility model can be used for compound fertilizer formula conversion, and the process does not need to stop the compound fertilizer production system; meanwhile, sufficient maintenance time can be provided for the maintenance of the compound fertilizer packaging machine when the compound fertilizer packaging machine fails; the bucket elevator can realize the transfer of the compound fertilizer particles and provide the buffer for the temporary storage and the quantitative addition, further, the return belt can realize the return of the material without the packaging process in time when the temporarily stored compound fertilizer particles cannot be added quantitatively, so as to avoid the caking and other defects caused by the long-time storage of the compound fertilizer particles; the utility model has the advantages of reasonable process design, quantitative addition or return of material without the packaging process, and reduction of energy consumption and cost under the premise of ensuring the quality of the compound fertilizer product. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0015] Figure 1 The structure of the present application is shown in the figure.

[0016] In the figure: 1, compound fertilizer coating machine; 2, compound fertilizer packaging machine; 3, first three-way valve; 4, large-capacity bin; 5, discharge valve; 6, metering belt scale; 7, bucket elevator; 8, second three-way valve; 9, return belt. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0018] The following will be described in combination with the drawings Figure 1The utility model discloses a further detailed description of the application is a kind of on-line recovery compound fertilizer formula intermediate material system, the system includes compound fertilizer production system in compound fertilizer coating machine 1 and compound fertilizer packaging machine 2, be equipped with first three-way switch valve 3 between compound fertilizer coating machine 1 and compound fertilizer packaging machine 2, and the third end of first three-way switch valve 3 is connected with compound fertilizer rationing unit by compound fertilizer buffer unit.The utility model can be used for compound fertilizer system conversion formula, also can be used when compound fertilizer packaging machine 2 fails, the compound fertilizer production system in the above use process can be in normal operation state, simultaneously make intermediate material enter compound fertilizer buffer unit by first three-way switch valve 3 and store, compound fertilizer buffer unit can be the way of storage tank storage, and storage tank storage can be multiple parallel intermediate storage tank or one large intermediate storage tank;Compound fertilizer rationing unit is used to make compound fertilizer in compound fertilizer buffer unit according to the quantitative mode and add to the back end of compound fertilizer coating machine 1, so as to reach the characteristics of guaranteeing that subsequent compound fertilizer meets corresponding specifications.

[0019] Further, the compound fertilizer buffer unit includes a large-capacity bin 4, the inlet of the large-capacity bin 4 is connected with the third end of the first three-way switch valve 3, and the discharge outlet of the large-capacity bin 4 is connected with a discharge valve 5. The large-capacity bin 4 in the utility model preferably can temporarily store the output of the compound fertilizer system for 3-4 hours, and the discharge valve 5 can be set to adjust the flow of the compound fertilizer particles during discharge, thereby laying a foundation for the subsequent quantitative addition of compound fertilizer.

[0020] Further, the volume of the large-capacity bin 4 is 65-110 cubic meters. The volume of 65-110 cubic meters in the utility model can temporarily store about 80-100 tons of compound fertilizer, thereby achieving the purpose of non-stop production of the compound fertilizer production system. The above setting can ensure the normal operation of the compound fertilizer production system for 3-4 hours.

[0021] Further, the compound fertilizer rationing unit includes a metering belt scale 6 arranged at the bottom of the discharge valve 5. The metering belt scale 6 can be set to weigh and convey the compound fertilizer particles from the large-capacity bin 4, thereby achieving the purpose of quantitative addition of intermediate materials.

[0022] Further, the compound fertilizer rationing unit further includes a bucket elevator 7 arranged between the compound fertilizer coating machine 1 and the first three-way switch valve 3, and the lower inlet of the bucket elevator 7 is connected with the outlet of the metering belt scale 6 and the outlet of the compound fertilizer coating machine 1, respectively. The bucket elevator 7 can be set to provide time and space for the storage and quantitative addition of fertilizer particles without affecting the normal production process of compound fertilizer, thereby ensuring the stable operation of the entire system.

[0023] Further, the second three-way valve 8 is arranged between the bottom of the discharge valve 5 and the inlet of the metering belt scale 6, and the third end of the second three-way valve 8 is connected with the return belt 9. Through the above arrangement, when the compound fertilizer particles in the large-capacity bin 4 cannot be quantitatively added, the return belt 9 can be used for timely returning, so as to avoid the problem of caking caused by long-term storage in the large-capacity bin 4. Compared with the traditional technology, the above process can save the packaging process, transportation and re-feeding process.

[0024] The working principle of the utility model is as follows: when the compound fertilizer is normally produced, the compound fertilizer particles produced in the compound fertilizer production system enter the compound fertilizer coating machine 1 for coating treatment, and the coated compound fertilizer particles enter the compound fertilizer packaging machine 2 for packaging through the bucket elevator 7 and the first three-way switch valve 3; when the compound fertilizer packaging machine 2 fails, the compound fertilizer packaging machine 2 is repaired, the first three-way switch valve 3 is switched, and the coated compound fertilizer particles enter the large-capacity bin 4 for temporary storage through the bucket elevator 7 and the first three-way switch valve 3; when the compound fertilizer packaging machine 2 can normally operate, the first three-way switch valve 3 is switched, and the compound fertilizer particles of the compound fertilizer coating machine 1 and the temporarily stored compound fertilizer particles in the large-capacity bin 4 enter the compound fertilizer packaging machine 2 for packaging through the bucket elevator 7 and the first three-way switch valve 3; when the formula needs to be converted, the first three-way switch valve 3 is switched, and the coated compound fertilizer particles enter the large-capacity bin 4 for temporary storage through the bucket elevator 7 and the first three-way switch valve 3; after the new formula product raw material is fed and operated for 3-4 hours, that is, after the formula is changed, the quality of the new product at the outlet of the granulator is tested to see whether it meets the requirements, and according to the effective content of nitrogen, phosphorus and potassium elements in the new formula, the addition amount of the temporarily stored compound fertilizer particles in the large-capacity bin 4 is determined to ensure the final compound fertilizer specification requirements. The specific process is as follows: the amount of temporarily stored compound fertilizer per kilogram is determined by conversion, the flow of temporarily stored compound fertilizer is controlled by the discharge valve 5 and the metering belt scale 6 to add to the bucket elevator 7, and the compound fertilizer in the bucket elevator 7 includes new compound fertilizer from the compound fertilizer coating machine and compound fertilizer temporarily stored in the large-capacity bin 4; the above-mentioned fertilizer enters the compound fertilizer packaging machine 2 for packaging through the first three-way switch valve 3, and the temporarily stored compound fertilizer in the large-capacity bin 4 is used up; when the temporarily stored compound fertilizer in the large-capacity bin 4 cannot be mixed with the compound fertilizer in the new formula, the compound fertilizer in the new formula enters the compound fertilizer packaging machine 2 for packaging through the bucket elevator 7 and the first three-way switch valve 3, and the compound fertilizer in the large-capacity bin 4 enters the compound fertilizer production system as raw material through the discharge valve 5, the third end of the second three-way valve 8 and the return belt 9 for recycling.

[0025] Test example

[0026] The utility model is explained in detail for the method of quantitatively adding the temporarily stored compound fertilizer in the large-capacity bin 4, and the specific process is as follows:

[0027] When the production is converted from N-P-K=22-9-9 to 15-15-15, the implementation is as follows:

[0028] First step: when the formula is changed, the material flow is as follows: the compound fertilizer particles produced in the compound fertilizer production system enter the compound fertilizer coating machine 1 for coating treatment, and the coated compound fertilizer particles enter the large-capacity bin 4 through the bucket elevator 7 and the first three-way valve 3 for temporary storage (the formula changing time is 3-4 hours);

[0029] Second step: when the new formula product raw material is fed and runs for 3-4 hours, i.e. after the formula changing is completed, and the quality of the new product at the outlet of the granulator meets the requirements, the following calculation is made: if the analysis result of the new product is 15.5-14.5-15.3, the nutrient of the new product (total nutrient 45.3, NPK single nutrient is qualified) is qualified, at this time, the amount of intermediate material 22-9-9 (the nutrient is the actual production and testing nutrient) to be added is: ① because the added intermediate material P and K nutrient is 9, which is lower than P and K nutrient in the new product 15.5-14.5-15.3, the product nutrient after addition is set to 17.3-14-14 to facilitate the calculation of the added amount, ② because P=14.5 in the new product nutrient is the lowest, the P content is used for calculation, and the other N and K element contents are also qualified, if 1000 kg of final product needs to add 22-9-9 akg, then the new product needs (1000-a) kg, the equation is: 14.5(1000-a)+9a=14x1000, the solution is a=91 kg, so the new product amount is 909 kg, the ratio of the new product and the intermediate material is: 909÷91=10:1, ③ when the actual production amount of the new product is 25 t / h, the maximum amount of intermediate material that can be added (maximum amount) is 2.5 t / h. The compound fertilizer temporarily stored in the large-capacity bin 4 is added to the normal production system (new product) through the metering belt scale 6, which is set to a certain amount (the maximum amount is calculated to be 2.5 t / h) such as 2.0 t / h, to achieve the purpose of recycling the intermediate material. Because the added amount has been calculated, it does not affect the nutrient of the final product in normal production.

[0030] Based on a set of 200,000 tons / year production device, according to the formula changing once every 3 days, and 300 days of production per year, 6000 tons of intermediate material will be produced per year, and the processing fee of each compound fertilizer enterprise is 200 yuan / ton, which will save 1.2 million yuan / year by using the device to recycle.

[0031] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A system for recycling compound fertilizer formula intermediate material on line, the system comprising a compound fertilizer coating machine (1) and a compound fertilizer packaging machine (2) in a compound fertilizer production system, characterized in that: The first three-way valve (3) is arranged between the compound fertilizer coating machine (1) and the compound fertilizer packaging machine (2), and the third end of the first three-way valve (3) is connected with the compound fertilizer buffering unit and the compound fertilizer quantitative adding unit through the compound fertilizer buffering unit.

2. The system for recycling the intermediate material of compound fertilizer formula online according to claim 1, characterized in that: The compound fertilizer buffering unit comprises a large-capacity bin (4), the inlet of the large-capacity bin (4) is connected with the third end of the first three-way valve (3), and the outlet of the large-capacity bin (4) is connected with a discharge valve (5).

3. The system for recycling online composite fertilizer replacement formula intermediate material according to claim 2, characterized in that: The large-capacity bin (4) has a volume of 65-110 cubic meters.

4. The system for recycling the intermediate material of compound fertilizer formula online according to claim 2 or 3, characterized in that: The compound fertilizer quantitative adding unit comprises a metering belt scale (6) arranged at least at the bottom of the discharge valve (5).

5. The system for recycling online composite fertilizer replacement formula intermediate material according to claim 4, characterized in that: The compound fertilizer quantitative adding unit further comprises a bucket elevator (7) arranged between the compound fertilizer coating machine (1) and the first three-way valve (3), and the lower inlet of the bucket elevator (7) is respectively connected with the outlet of the metering belt scale (6) and the outlet of the compound fertilizer coating machine (1).

6. The system for recycling online composite fertilizer replacement formula intermediate material according to claim 5, characterized in that: The second three-way valve (8) is arranged between the bottom of the discharge valve (5) and the inlet of the metering belt scale (6), and the third end of the second three-way valve (8) is connected with a return belt (9).

Images