Tubular reactor for ammonia-acid method compound fertilizer production

Abstract

The utility model belongs to the technical field of chemical fertilizer production equipment, and particularly relates to a tubular reactor for producing compound fertilizer by an ammonia-acid method, which comprises a three-way pipe, a reaction pipe and an elbow which are horizontally connected in sequence, another horizontal port of the three-way pipe is connected with an ammonia inlet pipe, an upper port of the three-way pipe is an acid inlet, the elbow is connected with a nozzle, and the nozzle is connected with the reaction pipe. An anti-blocking structure is arranged in the nozzle; the anti-blocking structure comprises an anti-blocking structure, and the rotating shaft is rotationally arranged in the inner cavity of the nozzle, a cam is fixedly installed in the middle of the rotating shaft, smashing cutters are installed on the two sides of the cam on the rotating shaft, and the smashing cutters can smash crystal substances so as to prevent the nozzle from being blocked.

Description

Technical Field

[0001] The utility model belongs to the technical field of fertilizer production equipment, and specifically relates to a tubular reactor for producing compound fertilizer using an amino acid process. Background Art

[0002] At present, the production process of compound fertilizer by amino acid method is gradually emerging, representing the latest process of compound fertilizer production. The existing method of producing ternary compound fertilizer by amino acid method includes the following steps: raw materials such as potassium chloride, monoammonium phosphate, ammonium chloride, urea, etc. are metered by microcomputer and enter the drum granulator, and ammonia and acid are directly passed into the material layer of the granulator through buried pipes, and steam is evenly sprayed on the materials in the drum granulator for granulation, and then enter the drying system in turn, and enter the screening through the cooling system after drying. The materials that have not passed through the screen are crushed and returned to the drum granulator, and the screened part enters the packaging machine, anti-caking agent is added, and it is packaged after being stored in the silo.

[0003] A Chinese patent application numbered CN201220576419.8 discloses a tubular reactor for preparing ammonia-based compound fertilizer, comprising a tee, a plurality of reaction tubes, an elbow and a nozzle connected in sequence horizontally, the upper end of the tee being an acid inlet, an ammonia inlet tube inserted into the other horizontal end of the tee, the ammonia inlet tube being inserted no less than 20 mm past the acid inlet, a steam inlet being provided on the ammonia inlet tube for preheating the tubular reactor before use and for purging after use, the tee, reaction tube, elbow and nozzle being a composite tube having an inner silicon carbide tube, a polytetrafluoroethylene material lining with a fixed silicon carbide tube in the middle and an outer steel tube, the ammonia inlet tube being a stainless steel tube lined with polytetrafluoroethylene material.

[0004] However, in the above technology, sulfuric acid and ammonia react completely in a tubular reactor, and the residual ammonium sulfate solution crystals easily clog the nozzle of the tubular reactor. The nozzle in the prior art has shortcomings. Due to its simple structure, it requires the help of external objects to clean the clogged nozzle. For this reason, an improved tubular reactor for the production of amino acid compound fertilizer is designed. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides a tubular reactor for producing compound fertilizer using the amino acid process, so as to solve the above-mentioned problems in the background technology.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A tubular reactor for producing compound fertilizer using the amino acid process, comprising a tee, a reaction tube and an elbow connected in sequence horizontally, the other horizontal end of the tee being connected to an ammonia inlet pipe, the upper end of the tee being an acid inlet, a nozzle being connected to the elbow, and an anti-blocking structure being provided inside the nozzle;

[0008] The anti-blocking structure includes a rotating shaft, which is rotatably arranged in the inner cavity of the nozzle, a cam is fixedly installed in the middle of the rotating shaft, and crushing knives are installed on both sides of the cam on the rotating shaft. The crushing knives can crush crystals to prevent the nozzle from being blocked.

[0009] By adopting the above structural design, gaseous ammonia enters the tubular reactor through the ammonia inlet pipe, sulfuric acid is transported into the tubular reactor from the acid inlet by the sulfuric acid pump, and sulfuric acid and ammonia are completely reacted in the tubular reactor and then flow out from the nozzle through the reaction tube and the elbow. In order to prevent the ammonium sulfate crystals from clogging the nozzle, an anti-clogging structure is arranged inside the nozzle. During the flow of the reactants, the ammonium sulfate crystals come into contact with the crushing knife and are crushed by the crushing knife to prevent the nozzle from being blocked.

[0010] Furthermore: the nozzle includes a connecting pipe and a discharge head, the connecting pipe, the three-way pipe and the reaction tube are flange-connected, the discharge head and the connecting pipe are threadedly connected, the discharge head is provided with a discharge hole, and a circular boss is provided inside the discharge head.

[0011] Furthermore, the rotating shaft is rotatably mounted on the connecting tube via a sealed bearing, and one end of the rotating shaft exposed from the connecting tube is connected to a knob disk.

[0012] Further: the anti-blocking structure also includes:

[0013] A push rod, the push rod is arranged along the central axis of the discharge hole, a contact plate is provided at the end of the push rod, the cam is in contact with the contact plate, and the width of the contact plate is smaller than the distance between the crushing knives on the upper and lower sides of the cam;

[0014] A spring, one end of which is fixedly connected to the boss, the push rod is inserted into the spring, and a limit plate is provided near one end of the push rod.

[0015] Furthermore: a plurality of overflow holes are provided on the limit plate, and the plurality of overflow holes are arranged in a circular array with the center of the limit plate as the center.

[0016] By adopting the above structural design, when the nozzle is clogged, the rotating shaft can be driven under the action of external force. The rotation of the rotating shaft drives the crushing knife and the cam to rotate at the same time. After the cam rotates, it moves against the contact plate, and the contact plate drives the push rod to move. Since a spring is arranged inside the discharge head, under the action of the spring and the cam, the push rod can reciprocate in the discharge hole to prevent the discharge hole from being clogged. At the same time, the rotation of the crushing knife can break up the crystals and prevent clogging.

[0017] Furthermore: the three-way pipe, reaction tube and elbow are built-in silicon carbide tubes, and the ammonia inlet pipe is a stainless steel lined with polytetrafluoroethylene material tube.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. Gaseous ammonia enters the tubular reactor through the ammonia inlet pipe, and sulfuric acid is transported into the tubular reactor from the acid inlet by the sulfuric acid pump. After sulfuric acid and ammonia react completely in the tubular reactor, they flow out from the nozzle through the reaction tube and the elbow. In order to prevent the ammonium sulfate crystals from clogging the nozzle, an anti-clogging structure is set inside the nozzle. During the flow of the reactants, the ammonium sulfate crystals come into contact with the crushing knife and are crushed by the crushing knife to prevent the nozzle from being blocked;

[0020] 2. When the nozzle is clogged, the shaft can be driven by external force. The rotation of the shaft drives the crushing knife and the cam to rotate at the same time. After the cam rotates, it moves against the contact plate, and the contact plate drives the push rod to move. Since a spring is arranged inside the discharge head, the push rod can reciprocate in the discharge hole under the action of the spring and the cam to prevent the discharge hole from being blocked. At the same time, the rotation of the crushing knife can break up the crystals and prevent blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a tubular reactor for producing compound fertilizer using the amino acid method of the utility model;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of a nozzle in an embodiment of a tubular reactor for producing compound fertilizer using the amino acid method of the utility model;

[0023] Figure 3 This is a three-dimensional structural schematic diagram of an anti-blocking structure in an embodiment of a tubular reactor for producing compound fertilizer using the amino acid method of the utility model (viewing angle 1);

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the anti-blocking structure in an embodiment of a tubular reactor for producing compound fertilizer using the amino acid method of the utility model (viewing angle 2);

[0025] The reference numerals in the drawings of the specification include:

[0026] A tee pipe (1), a reaction tube (2), an elbow (3), a nozzle (4), a connecting pipe (41), a discharge head (42), a discharge hole (421), a boss (422), an anti-blocking structure (5), a knob plate (51), a sealing bearing (511), a crushing knife (53), a cam (54), a push rod (55), a limit plate (56), an overflow hole (561), a spring (57), a contact plate (58), a rotating shaft (52), an ammonia inlet pipe (6), a steam inlet (7), and an acid inlet (8). DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1:

[0032] like Figure 1-4Specifically, a tubular reactor for producing compound fertilizer using the amino acid method comprises a tee pipe 1, a reaction pipe 2 and an elbow 3 which are connected in sequence horizontally, the other horizontal port of the tee pipe 1 is connected with an ammonia inlet pipe 6, the upper port of the tee pipe 1 is an acid inlet 8, the elbow 3 is connected with a nozzle 4, and an anti-blocking structure 5 is arranged inside the nozzle 4; the anti-blocking structure 5 comprises a rotating shaft 52, the rotating shaft 52 is rotatably arranged in the inner cavity of the nozzle 4, a cam 54 is fixedly installed in the middle of the rotating shaft 52, crushing knives 53 are installed on both sides of the cam 54 on the rotating shaft 52, and the crushing knives 53 can crush the crystals to prevent the nozzle 4 from being blocked. Gaseous ammonia enters the tubular reactor through the ammonia inlet pipe 6, and sulfuric acid is transported into the tubular reactor from the acid inlet 8 by the sulfuric acid pump. After the sulfuric acid and ammonia are completely reacted in the tubular reactor, they flow out from the nozzle 4 through the reaction tube 2 and the elbow 3. In order to prevent the ammonium sulfate crystals from clogging the nozzle 4, an anti-clogging structure 5 is arranged inside the nozzle 4. During the flow of the reactants, the ammonium sulfate crystals come into contact with the crushing knife 53 and are crushed by the crushing knife 53 to prevent the nozzle 4 from being blocked.

[0033] In this example, the nozzle 4 includes a connecting pipe 41 and a discharge head 42. The connecting pipe 41, the three-way pipe 1 and the reaction tube 2 are connected by flanges. The discharge head 42 and the connecting pipe 41 are connected by threads. The discharge head 42 is provided with a discharge hole 421, and a circular boss 422 is provided inside the discharge head 42.

[0034] In this example, the rotating shaft 52 is rotatably mounted on the connecting tube 41 via a sealed bearing 511 , and one end of the rotating shaft 52 exposed from the connecting tube 41 is connected to a knob plate 51 .

[0035] In this example, the anti-blocking structure 5 also includes: a push rod 55, which is arranged along the central axis of the discharge hole 421, and a contact plate 58 is provided at the end of the push rod 55, the cam 54 is in contact with the contact plate 58, and the width of the contact plate 58 is smaller than the distance between the crushing knives 53 on the upper and lower sides of the cam 54; a spring 57, one end of the spring 57 is fixedly connected to the boss 422, the push rod 55 is inserted in the spring 57, and a limit plate 56 is provided at one end of the push rod 55 close to the spring 57.

[0036] In this example, the limiting plate 56 is provided with a plurality of overflow holes 561, and the plurality of overflow holes 561 are arranged in a circular array with the center of the limiting plate 56 as the center. By adopting the above structural design, when the nozzle 4 is clogged, the rotating shaft 52 can be driven by an external force, and the rotation of the rotating shaft 52 drives the crushing knife 53 and the cam 54 to rotate at the same time. After the cam 54 rotates, it moves against the contact plate 58, and the contact plate 58 drives the push rod 55 to move. Since a spring 57 is provided inside the discharge head 42, under the action of the spring 57 and the cam 54, the push rod 55 can reciprocate in the discharge hole 421 to prevent the discharge hole 421 from being clogged. At the same time, the crushing knife 53 rotates to break up the crystals and prevent clogging.

[0037] In this example, the tee tube 1, the reaction tube 2 and the elbow 3 are built-in silicon carbide tubes, and the ammonia inlet tube 6 is a stainless steel tube lined with polytetrafluoroethylene.

[0038] Working principle: When the nozzle 4 is clogged, the rotating shaft 52 is driven to rotate by rotating the knob disk 51, and the rotation of the rotating shaft 52 drives the crushing knife 53 and the cam 54 to rotate at the same time. After the cam 54 rotates, it moves against the contact plate 58, and the contact plate 58 drives the push rod 55 to move. Since a spring 57 is provided inside the discharge head 42, under the action of the spring 57 and the cam 54, the push rod 55 can reciprocate in the discharge hole 421 to prevent the discharge hole 421 from being blocked. At the same time, the crushing knife 53 rotates to break up the crystals and prevent blockage.

[0039] The above are only embodiments of the utility model, and the circuits, electronic components and modules involved are all prior art, which can be fully implemented by those skilled in the art. It is needless to say that the content protected by this application does not involve improvements to software and methods. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the prior art in the field, and have the ability to apply conventional experimental means before the date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A tubular reactor for producing compound fertilizer using the amino acid process, comprising a tee (1), a reaction tube (2) and an elbow (3) connected in sequence horizontally, the other horizontal end of the tee (1) being connected to an ammonia inlet pipe (6), the upper end of the tee (1) being an acid inlet (8), characterized in that: The elbow (3) is connected to a nozzle (4), and an anti-blocking structure (5) is provided inside the nozzle (4); The anti-blocking structure (5) comprises a rotating shaft (52), the rotating shaft (52) being rotatably arranged in the inner cavity of the nozzle (4), a cam (54) being fixedly mounted in the middle of the rotating shaft (52), crushing knives (53) being mounted on both sides of the cam (54) on the rotating shaft (52), and the crushing knives (53) being capable of crushing crystals to prevent the nozzle (4) from being blocked.

2. The tubular reactor for producing compound fertilizer using the amino acid process as claimed in claim 1, characterized in that: The nozzle (4) comprises a connecting pipe (41) and a discharge head (42); the connecting pipe (41), the three-way pipe (1) and the reaction tube (2) are connected by flanges; the discharge head (42) and the connecting pipe (41) are connected by threads; the discharge head (42) is provided with a discharge hole (421); and a circular boss (422) is provided inside the discharge head (42).

3. A tubular reactor for producing compound fertilizer using the amino acid process as claimed in claim 2, characterized in that: The rotating shaft (52) is rotatably mounted on the connecting tube (41) via a sealing bearing (511), and one end of the rotating shaft (52) exposed from the connecting tube (41) is connected to a knob plate (51).

4. A tubular reactor for producing compound fertilizer using the amino acid process as claimed in claim 2, characterized in that: The anti-blocking structure (5) also includes: A push rod (55), the push rod (55) is arranged along the central axis of the discharge hole (421), a contact plate (58) is provided at the end of the push rod (55), the cam (54) is in contact with the contact plate (58), and the width of the contact plate (58) is smaller than the distance between the crushing knives (53) on the upper and lower sides of the cam (54); A spring (57), one end of the spring (57) is fixedly connected to the boss (422), the push rod (55) is inserted into the spring (57), and a limit plate (56) is provided at one end of the push rod (55) close to the spring (57).

5. A tubular reactor for producing compound fertilizer using the amino acid process as claimed in claim 4, characterized in that: The limiting plate (56) is provided with a plurality of overflow holes (561), and the plurality of overflow holes (561) are arranged in a circular array with the center of the limiting plate (56) as the center.

6. The tubular reactor for producing compound fertilizer using the amino acid process as claimed in claim 1, characterized in that: The three-way pipe (1), the reaction tube (2) and the elbow (3) are built-in silicon carbide tubes, and the ammonia inlet pipe (6) is a stainless steel tube lined with polytetrafluoroethylene.

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