CN215196802U

CN215196802U - A high tower granulation system for producing compound fertilizer

Info

Publication number: CN215196802U
Application number: CN202120869440.6U
Authority: CN
Inventors: 吴运清; 钟儒华; 袁乐斌
Original assignee: Hubei Haosite Agricultural Technology Co ltd
Current assignee: Hubei Haosite Agricultural Technology Co ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-12-17
Anticipated expiration: 2031-04-26

Abstract

The utility model discloses a high tower granulation system for producing compound fertilizer belongs to compound fertilizer technical field. Comprises a batching device, a melting tank, a mixing tank, a granulation high tower and a dust removal device; the batching device comprises a first batching bin, a first lifting structure, a spiral conveying structure, a second batching bin, a screening structure, a crushing structure, a second lifting structure, a third batching bin and a third lifting structure, and the mixing tank comprises a primary mixing tank and a secondary mixing tank; the material returning belt is respectively connected with the first lifting structure and the second lifting structure through a spiral conveying structure; first proportioning bins, first promotion structure and melting tank connect gradually, and second proportioning bins and screening structural connection, screening structure's coarse fodder export and crushing structural connection, and screening structure's fine material export and crushing structure promote the structure through the second and are connected with the one-level mixing tank, and third proportioning bins, third promote structure and second grade mixing tank and connect gradually, and melting tank, one-level mixing tank, second grade mixing tank and granulation high tower connect gradually.

Description

A high tower granulation system for producing compound fertilizer

Technical Field

The utility model belongs to the technical field of compound fertilizer, in particular to a high tower granulation system for producing compound fertilizer.

Background

The compound fertilizer is a chemical fertilizer simultaneously containing two or more nutrient elements (N, P, K, Ca, Mg, S, etc.), overcomes the defect of single content of the traditional elementary fertilizer (only containing N, P, K one element), and can be prepared by formula according to the pH value of soil and the content of the nutrient elements in the soil of different regions.

The high-tower compound fertilizer can be processed by urea, potassium salt, ammonium phosphate, return materials and the like, and other raw materials such as filler and the like can be added according to needs. Current high tower granulation system includes dosing unit, molten bath, mixing tank, granulation high tower and dust collector etc. usually, and dosing unit includes urea proportioning bins (add urea) and other raw materials proportioning bins (add other raw materials except urea), and urea proportioning bins is connected with the molten bath through promoting the structure (setting the belt of weighing), and other raw materials proportioning bins and returning charge belt are connected with the mixing tank, and the molten bath, mixing tank and granulation high tower connect gradually.

The applicant has found two problems in the preparation of compound fertilizers using the aforementioned structure:

1. when the temperature is high during the urea melting, the urea is easy to react with the ammonium phosphate in the mixing tank to obtain the biuret.

2. When producing compound fertilizer (such as balanced fertilizer) with low nitrogen content, the returned material is more, if the materials are all added into the mixing tank, the solid-liquid ratio in the mixing tank is large, the materials are easy to overflow, the temperature is not easy to adjust, and the granulation effect is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the embodiment of the utility model provides a high tower granulation system for producing compound fertilizer, the return material can be added into a melting tank or/and a primary mixing tank according to the requirement, the overflow of the mixing tank can be avoided, and the granulation effect is ensured; the feeding is adjusted, the ammonium phosphate enters the secondary mixing tank independently, the temperature of the urea is reduced, and the side reaction of the urea and the ammonium phosphate can be reduced. The technical scheme is as follows:

the embodiment of the utility model provides a high tower granulation system for producing compound fertilizer, which comprises a batching device, a melting tank, a mixing tank, a granulation high tower and a dust removal device; the batching device comprises a first batching bin, a first lifting structure, a spiral conveying structure, a second batching bin, a screening structure, a crushing structure, a second lifting structure, a third batching bin and a third lifting structure, and the mixing tank comprises a primary mixing tank and a secondary mixing tank; a feed port in the middle of the spiral conveying structure is connected with the material returning belt, and discharge ports at two ends of the spiral conveying structure are respectively connected with feed ports of the first lifting structure and the second lifting structure; the first proportioning bin, the first lifting structure and the melting tank are sequentially connected, the second proportioning bin is arranged above the screening structure and is connected with a feed inlet of the screening structure, the crushing structure is arranged below the screening structure, a coarse material outlet of the screening structure is connected with a feed inlet of the crushing structure, a fine material outlet of the screening structure and a discharge outlet of the crushing structure are connected with a feed inlet of the second lifting structure, a discharge outlet of the second lifting structure is connected with the first-stage mixing tank, the third proportioning bin, the third lifting structure and the second-stage mixing tank are sequentially connected, the melting tank, the first-stage mixing tank, the second-stage mixing tank and the granulation high tower are sequentially connected through pipelines, and a tail gas outlet of the melting tank, the first-stage mixing tank and the granulation high tower is connected with a dust removal device through pipelines; first proportioning bins is urea proportioning bins, second proportioning bins is potash fertilizer proportioning bins, third proportioning bins is the ammonium phosphate proportioning bins.

Further, the embodiment of the utility model provides an in high tower granulation system still includes emulsification device, emulsification device locates on the pipeline between second grade mixing tank and the granulation high tower, emulsification device includes vertical emulsion machine or pipeline formula emulsion machine.

Preferably, the emulsification device in the embodiment of the present invention is a pipeline type emulsification machine.

Wherein, the embodiment of the utility model provides an in all be equipped with steam heating structure on melting tank, one-level mixing tank and the second grade mixing tank, the settlement temperature of second grade mixing tank is less than the settlement temperature of one-level mixing tank.

The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the embodiment of the utility model provides a high tower granulation system for producing compound fertilizer, the returning charge can be added into the melting tank or/and the primary mixing tank as required, the overflow of the mixing tank can be avoided, and the granulation effect is ensured; the feeding is adjusted, the ammonium phosphate enters the secondary mixing tank independently, the temperature of the urea is reduced, and the side reaction of the urea and the ammonium phosphate can be reduced.

Drawings

Fig. 1 is a schematic block diagram of a high tower granulation system for producing compound fertilizer provided by the embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the embodiment of the present invention provides a high tower granulation system for producing compound fertilizer, which includes a batching device, a melting tank (for melting urea), a mixing tank (for mixing other raw materials with melted urea), a granulation high tower (for high tower granulation), and a dust removing device (for dust removal). The structure is basically the same as that of the existing high tower granulation system, except that: the dosing unit in this embodiment includes first proportioning bins, first promotion structure, auger delivery structure, second proportioning bins, screening structure (conventional structure for obtain the raw materials that accord with the feeding particle size), crushing structure (conventional structure, be used for smashing the coarse fodder and obtain the raw materials that accord with the feeding particle size), the second promotes structure, third proportioning bins and third and promotes the structure etc. and the mixing tank includes one-level mixing tank and second grade mixing tank. A feed port in the middle of the spiral conveying structure is connected with the material returning belt, and discharge ports at two ends of the spiral conveying structure are respectively connected with a feed port of the first lifting structure and a feed port of the second lifting structure; the returned materials are respectively conveyed into the first lifting structure and the second lifting structure through forward and reverse conveying of the spiral conveying structure; specifically, the return materials are fed into the first-stage mixing tank when the return materials are less and the nitrogen content is higher, and the return materials are selectively fed into the melting tank and/or the first-stage mixing tank according to the parameters such as the amount of the return materials, the nitrogen content and the fluidity of the molten liquid in other cases. First proportioning bins, first promotion structure and melting tank connect gradually. The top of screening structure and its (the discharge gate of bottom) are located to the second proportioning bins and are connected (through chute or elephant trunk etc.) with the feed inlet of screening structure, and screening structure's below is located to broken structure, and screening structure's coarse fodder export is connected (through chute or elephant trunk etc.) with broken structure's feed inlet, and screening structure's fine fodder export and broken structure's discharge gate all are connected (through chute or elephant trunk etc.) with the feed inlet that the second promoted the structure, and the second promotes the discharge gate of structure and is connected with the one-level mixing tank. Third proportioning bins, third promote structure and second grade mixing tank and connect gradually, and melting tank, one-level mixing tank (overflow output), second grade mixing tank and granulation high tower connect gradually through taking the pump line, and the tail gas outlet of melting tank, one-level mixing tank and granulation high tower all is connected with dust collector through the pipeline of taking the fan in order to carry out tail gas treatment. First proportioning bins is used for adding urea for urea proportioning bins, and the second proportioning bins is that potash fertilizer proportioning bins is used for adding potash fertilizer (still can add other raw materialss except urea and ammonium phosphate as required), and the third proportioning bins is that the ammonium phosphate proportioning bins is used for adding the ammonium phosphate (still can add the filler as required, usually for this factory production self-service, usually for whitewashed ammonium, the possibility that hardens is lower, does not usually need sieve and crushing).

Further, referring to fig. 1, the embodiment of the present invention provides a tower granulation system further comprising an emulsifying device to promote the fluidity of slurry, wherein the emulsifying device is disposed on the pipeline between the second-stage mixing tank and the granulation tower, and the emulsifying device comprises a vertical emulsifying machine or a pipeline emulsifying machine.

Wherein, the embodiment of the utility model provides an in all be equipped with steam heating structure (like steam heating jacket) on melting tank, one-level mixing tank and the second grade mixing tank, the settlement temperature of second grade mixing tank is less than the settlement temperature of one-level mixing tank in order to reduce the side reaction of phosphorus ammonium and urea.

In this embodiment, "first", "second", and "third" only have a distinguishing function, and have no other special meaning. Structures such as a flow valve, a pump and a valve are arranged on pipelines among the structures as required, and a conveying belt (preferably a weighing conveying belt) is arranged among the structures as required.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A high tower granulation system for producing compound fertilizer comprises a batching device, a melting tank, a mixing tank, a granulation high tower and a dust removal device; the automatic batching device is characterized by comprising a first batching bin, a first lifting structure, a spiral conveying structure, a second batching bin, a screening structure, a crushing structure, a second lifting structure, a third batching bin and a third lifting structure, wherein the mixing tank comprises a primary mixing tank and a secondary mixing tank;

a feed port in the middle of the spiral conveying structure is connected with the material returning belt, and discharge ports at two ends of the spiral conveying structure are respectively connected with feed ports of the first lifting structure and the second lifting structure; the first proportioning bin, the first lifting structure and the melting tank are sequentially connected, the second proportioning bin is arranged above the screening structure and is connected with a feed inlet of the screening structure, the crushing structure is arranged below the screening structure, a coarse material outlet of the screening structure is connected with a feed inlet of the crushing structure, a fine material outlet of the screening structure and a discharge outlet of the crushing structure are connected with a feed inlet of the second lifting structure, a discharge outlet of the second lifting structure is connected with the first-stage mixing tank, the third proportioning bin, the third lifting structure and the second-stage mixing tank are sequentially connected, the melting tank, the first-stage mixing tank, the second-stage mixing tank and the granulation high tower are sequentially connected through pipelines, and a tail gas outlet of the melting tank, the first-stage mixing tank and the granulation high tower is connected with a dust removal device through pipelines; first proportioning bins is urea proportioning bins, second proportioning bins is potash fertilizer proportioning bins, third proportioning bins is the ammonium phosphate proportioning bins.

2. The tower granulation system for producing compound fertilizer as defined in claim 1, further comprising an emulsifying device, wherein the emulsifying device is disposed on a pipeline between the secondary mixing tank and the granulation tower, and the emulsifying device comprises a vertical emulsifying machine or a pipeline emulsifying machine.

3. The high tower granulation system for producing compound fertilizer as claimed in claim 2, wherein the emulsifying device is a pipeline type emulsifying machine.

4. The tower granulation system for producing compound fertilizer as claimed in claim 1, wherein the melting tank, the primary mixing tank and the secondary mixing tank are provided with steam heating structures, and the set temperature of the secondary mixing tank is lower than that of the primary mixing tank.