CN214937113U - Compound fertilizer production system with simple structure - Google Patents
Compound fertilizer production system with simple structure Download PDFInfo
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- CN214937113U CN214937113U CN202120420016.3U CN202120420016U CN214937113U CN 214937113 U CN214937113 U CN 214937113U CN 202120420016 U CN202120420016 U CN 202120420016U CN 214937113 U CN214937113 U CN 214937113U
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Abstract
The utility model discloses a simple structure's compound fertilizer production system belongs to compound fertilizer production technical field. The system comprises a tail gas treatment device, a reactor, a granulation device, a drying device and a cooling device, wherein the tail gas treatment device comprises a granulation tail gas washer, a cyclone dust collector, a bag type dust collector, a comprehensive washing tower, a large circulation tank and a small circulation tank; the granulation tail gas washer is connected with the large circulation tank; the comprehensive washing tower is divided into three sections from bottom to top, a lower spray head is arranged in the lower section of the comprehensive washing tower, an upper spray head and a demister are arranged in the middle section of the comprehensive washing tower, and a partition plate is arranged between the lower section and the middle section of the comprehensive washing tower; the cyclone dust collector is connected with the lower air inlet, the bag type dust collector is connected with the upper air inlet, the granulation tail gas washer is connected with the middle air inlet, the middle liquid outlet is connected with the small circulation groove, the small circulation groove is connected with the upper spray head and the large circulation groove, and the lower spray head is connected with the large circulation groove.
Description
Technical Field
The utility model belongs to the technical field of compound fertilizer production, in particular to compound fertilizer production system of simple structure.
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 existing compound fertilizer production system generally comprises a tail gas treatment device, a reactor (specifically, a reaction kettle, a tubular reactor or a combination thereof), a granulation device (specifically, a rotary drum granulator, a rotary table granulator and the like), a drying device (specifically, a fluidized bed and the like), a cooling device (specifically, a cooling roller) and the like which are sequentially connected through a pipeline, and the existing compound fertilizer production system further comprises a crushing device, a material returning device, a coating device, a packaging device and the like according to needs. Wherein, tail gas processing apparatus includes granulation tail gas scrubber (being used for handling dry tail gas (containing a large amount of ammonia and a large amount of dust)), stoving tail gas dust isolating construction (being used for separating the dust in the stoving tail gas (containing a small amount of ammonia and a small amount of dust (granule is great)) and the dust in the cooling tail gas dust isolating construction (being used for separating the dust in the cooling tail gas (containing a small amount of dust (granule is less)), etc., granulation tail gas scrubber passes through the tail gas exit linkage of pipeline with the prilling granulator, stoving tail gas dust isolating construction passes through the tail gas exit linkage of pipeline with drying device, cooling tail gas dust isolating construction passes through the tail gas exit linkage of pipeline with cooling device. Among the prior art, in order to realize guaranteeing that the tail gas of emission is up to standard, generally need carry out multistage processing to granulation tail gas and stoving tail gas, general granulation tail gas is through tertiary processing, and stoving tail gas is through two-stage processing, then needs four spray towers, and the structure is complicated and takes up an area of great.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the embodiment of the utility model provides a simple structure's compound fertilizer production system, this system only needs two spray towers and two circulation grooves to realize tail gas treatment, simple structure, and it is less to take up an area of according to the characteristics of various tail gases. The technical scheme is as follows:
the embodiment of the utility model provides a compound fertilizer production system with simple structure, this system includes tail gas processing apparatus and reactor, prilling granulator, drying device and cooling device that connect gradually through the pipeline, tail gas processing apparatus includes granulation tail gas scrubber, stoving tail gas dust separation structure and cooling tail gas dust separation structure, granulation tail gas scrubber is connected with the tail gas outlet of prilling device through the pipeline, stoving tail gas dust separation structure is connected with the tail gas outlet of drying device through the pipeline, cooling tail gas dust separation structure is connected with the tail gas outlet of cooling device through the pipeline; the tail gas treatment device also comprises a comprehensive washing tower 1, a large circulation tank 2 and a small circulation tank 3, wherein a liquid inlet of the granulation tail gas washer is connected with the large circulation tank 2 through a pipeline with a granulation circulating pump 4; the comprehensive washing tower 1 is divided into three sections from bottom to top, the inner upper part of the lower section 5 is provided with a lower spray nozzle 51, the inner upper part of the middle section 6 is provided with an upper spray nozzle 61 and a demister 62, the top of the upper section 7 is open, and a partition plate 8 through which gas can pass but liquid cannot pass is arranged between the lower section 5 and the middle section 6; the exhaust port of the drying tail gas and dust separating structure is connected with the lower air inlet 52 at the lower part of the lower section 5 through a pipeline, the exhaust port of the cooling tail gas and dust separating structure is connected with an upper inlet 71 at the lower part of the upper section 7 through a pipeline, the exhaust port of the granulation tail gas scrubber is connected with a middle air inlet 63 at the lower part of the middle section 6 through a pipeline with a fan 9, a middle liquid outlet 64 at the bottom of the middle section 6 is connected with the small circulating tank 3 through a pipeline, the small circulating tank 3 is connected with the upper spray head 61 and the large circulating tank 2 through a pipeline with an upper circulating pump 10 and a valve group, the lower spray nozzle 51 is connected with the large circulation tank 2 through a pipeline with a lower circulating pump 11, the large circulation tank 2 is connected with a washing liquid outlet of a granulation tail gas washer, a lower liquid outlet 53 at the bottom of the comprehensive washing tower 1, a phosphoric acid storage tank and a reactor through pipelines, and the small circulation tank 3 is connected with a process water recovery system and a sulfuric acid storage tank through pipelines.
Specifically, the embodiment of the present invention provides a large circulation tank 2 located below the granulation tail gas scrubber and the comprehensive washing tower 1 and having a stirrer therein, a small circulation tank 3 located above the large circulation tank 2 and located below the middle liquid outlet 64.
Wherein, the embodiment of the utility model provides an in granulation tail gas scrubber is including the venturi scrubber 12 and the granulation scrubbing tower 13 that connect gradually, the air inlet of venturi scrubber 12 passes through the pipeline and is connected with granulation device's tail gas exit, granulation scrubbing tower 13's gas vent passes through the pipeline and is connected with well air inlet 63, the lotion export of venturi scrubber 12 and granulation scrubbing tower 13 bottom all is connected with big circulating groove 2 through the pipeline, big circulating groove 2 is connected with venturi scrubber 12 and the shower nozzle in the granulation scrubbing tower 13 through the pipeline of taking granulation circulating pump 4.
Wherein, the embodiment of the present invention provides a diameter of the middle section 6 is larger than a diameter of the lower section 5, and a diameter of the middle section 6 is larger than a diameter of the upper section 7.
Specifically, the upper section 7 in the embodiment of the present invention is a cylindrical structure, and the lower section 5 is a cylindrical structure and has a bottom in a tapered shape with a large top and a small bottom; the middle section 6 is of a cylindrical structure, the diameter of the upper end of the middle section is gradually reduced from bottom to top, and the diameter of the lower end of the middle section is gradually reduced from top to bottom.
Wherein, the embodiment of the utility model provides an in 8 level settings of baffle and its upside be equipped with an at least communicating pipe 14, 14 vertical settings of communicating pipe are with lower part section 5 and middle part section 6 intercommunication, the upper end of communicating pipe 14 is than well liquid outlet 64 height.
Preferably, the number of communication pipes 14 in the embodiment of the present invention is one and the middle portion of partition plate 8 is located, umbrella-shaped cover 15 is disposed directly above communication pipe 14, umbrella-shaped cover 15 and communication pipe 14 are coaxially disposed, and the diameter of bottom of umbrella-shaped cover 15 is larger than that of communication pipe 14.
Specifically, the embodiment of the present invention provides an upper and lower two-layer upper nozzle 61 arranged side by side in the middle section 6, and the demister 62 is disposed between the two-layer upper nozzle 61.
Specifically, the embodiment of the utility model provides an in stoving tail gas dust separation structure be cyclone, cooling tail gas dust separation structure is bag collector.
Specifically, the embodiment of the utility model provides an in liquid outlet 64, process water recovery system and sulphuric acid storage tank pass through the pipeline and are connected with the top of little circulating bath 3, the bottom of little circulating bath 3 passes through the access connection of pipeline and last circulating pump 10.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the embodiment of the utility model provides a simple structure's compound fertilizer production system, this system only need two spray towers and two recycle tanks can realize tail gas treatment according to the characteristics of various tail gases, simple structure, take up an area of lessly.
Drawings
FIG. 1 is a schematic block diagram of a compound fertilizer production system with a simple structure provided by the embodiment of the utility model;
fig. 2 is a schematic structural diagram of an exhaust gas treatment device provided by an embodiment of the present invention.
Wherein, 1 comprehensive washing tower, 2 large circulation tanks, 3 small circulation tanks, 4 granulation circulating pumps, 5 lower sections, 6 middle sections, 7 upper sections, 8 clapboards, 9 fans, 10 upper circulating pumps, 11 lower circulating pumps, 12 Venturi scrubbers, 13 granulation washing towers, 14 communicating pipes and 15 umbrella-shaped covers;
a lower spray head 51, a lower air inlet 52 and a lower liquid outlet 53;
61 an upper spray head, 62 a demister, 63 a middle air inlet and 64 a middle liquid outlet;
71 an upper inlet;
granulating tail gas A, drying tail gas B, cooling tail gas C, phosphoric acid D, removing the phosphoric acid E from a reactor, removing process water F and removing sulfuric acid G from the reactor.
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. 1-2, the embodiment of the utility model provides a compound fertilizer production system of simple structure, this system include tail gas processing apparatus and the reactor (specifically can be reation kettle, tubular reactor or its combination) that connects gradually through the pipeline, prilling granulator (specifically can be rotary drum granulator or carousel granulator etc.), drying device (specifically can be fluidized bed etc.) and cooling device (specifically can be cooling drum) etc. still have reducing mechanism, returning charge device, diolame device and packing plant etc. as required. Wherein, tail gas processing apparatus includes granulation tail gas scrubber (being used for handling dry tail gas (containing a large amount of ammonia and a large amount of dust)), stoving tail gas dust isolating construction (being used for separating the dust in the stoving tail gas (containing a small amount of ammonia and a small amount of dust (granule is great)) and the dust in the cooling tail gas dust isolating construction (being used for separating the dust in the cooling tail gas (containing a small amount of dust (granule is less)), etc., granulation tail gas scrubber passes through the tail gas exit linkage of pipeline with the prilling granulator, stoving tail gas dust isolating construction passes through the tail gas exit linkage of pipeline with drying device, cooling tail gas dust isolating construction passes through the tail gas exit linkage of pipeline with cooling device. The structure of the aforementioned compound fertilizer production system is basically the same as that of the existing compound fertilizer production system, and the difference lies in that:
the tail gas treatment device in the embodiment further comprises a comprehensive washing tower 1 (used for realizing re-washing of the granulation tail gas, washing of the drying tail gas and discharging of the cooling tail gas (the temperature of the gas upwards output from the lower section 5 and the middle section 6 is high, the gas is high in humidity and can be mixed with the cooling tail gas, the temperature and the humidity are reduced, and the content of particles (which are very low) in the cooling tail gas) is diluted), a large circulation tank 2 (used for realizing washing liquid circulation of the whole tail gas treatment device) and a small circulation tank 3 (used for realizing independent circulation of the middle section 6), wherein a liquid inlet of the granulation tail gas washer (output to a corresponding spray head) is connected with the large circulation tank 2 through a pipeline with a granulation circulation pump 4. The comprehensive washing tower 1 is divided into three sections from bottom to top (a lower section 5, a middle section 6 and an upper section 7 from bottom to top), the upper part in the lower section 5 is provided with a lower spray nozzle 51 (used for realizing the treatment of the dry tail gas), the upper part in the middle section 6 is provided with an upper spray nozzle 61 and a demister 62 (used for realizing the further treatment of the granulation tail gas and the dry tail gas), the top of the upper section 7 is open (used for realizing the evacuation of gas, which is equivalent to a chimney and has longer requirement), and a separation plate 8 which can pass gas (upwards) but can not pass liquid is arranged between the lower section 5 and the middle section 6 (the lower section 5 and the middle section 6 are divided into two cavities and horizontally arranged). Wherein, the exhaust port of the drying tail gas and dust separating structure is connected with the lower air inlet 52 at the lower part of the lower section 5 through a pipeline, the exhaust port of the cooling tail gas and dust separating structure is connected with the upper air inlet 71 at the lower part of the upper section 7 through a pipeline, and the exhaust port of the granulating tail gas scrubber is connected with the middle air inlet 63 at the lower part of the middle section 6 through a pipeline with a fan 9. The middle liquid outlet 64 at the bottom of the middle section 6 is connected with the small circulation tank 3 through a pipeline, the small circulation tank 3 is connected with the upper spray head 61 and the large circulation tank 2 through a pipeline with an upper circulation pump 10 and a valve set (gating and adjusting the flow), and the lower spray head 51 is connected with the large circulation tank 2 through a pipeline with a lower circulation pump 11. The large circulation tank 2 is connected with a washing liquid outlet of the granulation tail gas washer, a lower liquid outlet 53 at the bottom of the comprehensive washing tower 1, a phosphoric acid storage tank and a reactor through pipelines, and the small circulation tank 3 is connected with a process water recovery system (used for collecting process water of a compound fertilizer production system or a whole phosphorus chemical industry system) and a sulfuric acid storage tank (also can be a phosphoric acid storage tank) through pipelines.
Specifically, referring to fig. 2, the large circulation tank 2 in the embodiment of the present invention is located below the granulation tail gas scrubber (venturi scrubber 12 and granulation scrubber 13) and the comprehensive scrubber 1 to reduce the use of the pump and is provided with the stirrer therein, and the small circulation tank 3 is located above the large circulation tank 2 and below the medium liquid outlet 64 to reduce the use of the pump. Among them, the large circulation tank 2 in the present embodiment has a large volume, and the small circulation tank 3 has a small volume.
Wherein, refer to fig. 2, the embodiment of the utility model provides an embodiment's granulation tail gas scrubber is including venturi scrubber 12 (vertical setting) and granulation scrubbing tower 13 that connect gradually in order to promote the tail gas treatment effect, venturi scrubber 12's air inlet passes through the pipeline and is connected with prilling granulator's tail gas exit, granulation scrubbing tower 13's gas vent passes through the pipeline and is connected with well air inlet 63, venturi scrubber 12 and granulation scrubbing tower 13 bottom's lotion export all are connected with big circulating groove 2 through the pipeline, big circulating groove 2 is connected with the shower nozzle of (upper portion) in venturi scrubber 12 and the granulation scrubbing tower 13 through the pipeline of taking granulation circulating pump 4.
Wherein, the embodiment of the utility model provides an in middle part section 6's diameter be greater than the diameter of lower part section 5, middle part section 6's diameter is greater than the diameter of upper portion section 7. Further, the diameter of the lower section 5 is larger than the diameter of the upper section 7.
Specifically, referring to fig. 2, the upper section 7 in the embodiment of the present invention is a cylindrical structure, and the lower section 5 is a cylindrical structure and has a bottom portion in a tapered shape with a large top and a small bottom. The middle section 6 is a cylindrical structure, the diameter of the upper end of the middle section is gradually reduced from bottom to top (forming a reducing cone), and the diameter of the lower end of the middle section is gradually reduced from top to bottom (forming a reducing cone). The upper section 7, the middle section 6 and the lower section 5 are arranged coaxially.
Wherein, see fig. 2, the embodiment of the utility model provides an in baffle 8 (be located the top of reducing circular cone, specifically be with 6 inner wall complex plectanes of middle part section) level set up and its upside be equipped with an at least communicating pipe 14 (specifically be the pipe), 14 vertical settings communicating pipe communicate lower part section 5 with middle part section 6 (be equipped with on the baffle 8 with 14 complex round holes communicating pipe), the upper end of communicating pipe 14 is higher than well liquid outlet 64 (the liquid level of middle part section 6 is lower than the upper end of communicating pipe 14 promptly, it can not pass through to realize gaseous also liquid).
Preferably, referring to fig. 2, in the embodiment of the present invention, the number of the communicating pipes 14 (coaxially disposed with the middle section 6) is one, and the middle portion of the partition plate 8 is disposed at the middle part, an umbrella-shaped cover 15 (large in the upper part and small in the lower part) is disposed right above the communicating pipe 14 to avoid blocking and uniformly distribute the gas around, and the diameter of the umbrella-shaped cover 15 and the diameter of the communicating pipe 14 are coaxially disposed and the diameter of the bottom of the umbrella-shaped cover 15 is larger than that of the communicating pipe 14.
Specifically, the embodiment of the present invention provides two layers of upper nozzles 61 (one or more upper nozzles 61 are provided on each layer) arranged side by side from top to bottom in the middle section 6, and the demister 62 (which may be a wire mesh demister) is provided between the two layers of upper nozzles 61.
Specifically, the embodiment of the utility model provides an in stoving tail gas dust separation structure be cyclone, cool off tail gas dust separation structure is bag collector.
Specifically, the embodiment of the utility model provides an in well liquid outlet 64, process water recovery system and sulphuric acid storage tank pass through the pipeline and are connected with the top of little circulating bath 3, the bottom of little circulating bath 3 (can be the toper bottom) is through the access connection of pipeline with last circulating pump 10, goes up the export of circulating pump 10 and divides two tunnel outputs.
Wherein, set up fan, pump, valve or flowmeter etc. as required on the pipeline between the aforesaid each structure.
Through tests, the ammonia concentration in the tail gas can be reduced to 80mg/m3The mass concentration of the particles is less than 200mg/m3。
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 (10)
1. A compound fertilizer production system with a simple structure comprises a tail gas treatment device, and a reactor, a granulating device, a drying device and a cooling device which are sequentially connected through pipelines, wherein the tail gas treatment device comprises a granulating tail gas washer, a drying tail gas and dust separating structure and a cooling tail gas and dust separating structure; it is characterized in that the preparation method is characterized in that,
the tail gas treatment device also comprises a comprehensive washing tower (1), a large circulation tank (2) and a small circulation tank (3), wherein a liquid inlet of the granulation tail gas washer is connected with the large circulation tank (2) through a pipeline with a granulation circulating pump (4); the comprehensive washing tower (1) is divided into three sections from bottom to top, the upper part in the lower section (5) is provided with a lower spray nozzle (51), the upper part in the middle section (6) is provided with an upper spray nozzle (61) and a demister (62), the top of the upper section (7) is open, and a partition plate (8) through which gas can pass but liquid cannot pass is arranged between the lower section (5) and the middle section (6); the exhaust port of the drying tail gas and dust separation structure is connected with a lower air inlet (52) at the lower part of a lower part section (5) through a pipeline, the exhaust port of the cooling tail gas and dust separation structure is connected with an upper air inlet (71) at the lower part of an upper part section (7) through a pipeline, the exhaust port of the granulation tail gas scrubber is connected with a middle air inlet (63) at the lower part of a middle part section (6) through a pipeline with a fan (9), a middle liquid outlet (64) at the bottom of the middle part section (6) is connected with a small circulation groove (3) through a pipeline, the small circulation groove (3) is connected with an upper spray head (61) and a large circulation groove (2) through a pipeline with an upper circulation pump (10) and a valve set, the lower spray head (51) is connected with the large circulation groove (2) through a pipeline with a lower circulation pump (11), and the large circulation groove (2) is connected with a washing liquid outlet of the granulation tail gas scrubber through a pipeline, The lower liquid outlet (53) at the bottom of the comprehensive washing tower (1), the phosphoric acid storage tank and the reactor are connected, and the small circulation tank (3) is connected with the process water recovery system and the sulfuric acid storage tank through pipelines.
2. Compound fertilizer production system with simple structure according to claim 1, characterized in that the large circulation tank (2) is located below the granulation tail gas scrubber and the comprehensive washing tower (1) and is provided with a stirrer therein, and the small circulation tank (3) is located above the large circulation tank (2) and is located below the middle liquid outlet (64).
3. Compound fertilizer production system with simple structure of claim 1, characterized in that, granulation tail gas scrubber is including venturi scrubber (12) and granulation scrubbing tower (13) that connect gradually, the air inlet of venturi scrubber (12) is through the tail gas exit linkage of pipeline with the prilling granulator, the gas vent of granulation scrubbing tower (13) is connected with well air inlet (63) through the pipeline, the lotion export of venturi scrubber (12) and granulation scrubbing tower (13) bottom all is connected with big circulating tank (2) through the pipeline, big circulating tank (2) are connected with the shower nozzle in venturi scrubber (12) and the granulation scrubbing tower (13) through the pipeline of taking granulation circulating pump (4).
4. Compound fertilizer production system with simple structure according to claim 1, characterized in that the diameter of the middle section (6) is larger than the diameter of the lower section (5) and the diameter of the middle section (6) is larger than the diameter of the upper section (7).
5. Compound fertilizer production system with simple structure as claimed in claim 4, characterized in that the upper section (7) is of cylindrical structure, the lower section (5) is of cylindrical structure and its bottom is of conical shape with big top and small bottom; the middle section (6) is of a cylindrical structure, the diameter of the upper end of the middle section is gradually reduced from bottom to top, and the diameter of the lower end of the middle section is gradually reduced from top to bottom.
6. Compound fertilizer production system with simple structure according to claim 4, characterized in that baffle (8) set up horizontally and its upper side is equipped with at least one communicating pipe (14), communicating pipe (14) vertical setting is with lower section (5) and middle part section (6) intercommunication, the upper end of communicating pipe (14) is higher than well liquid outlet (64).
7. Compound fertilizer production system with simple structure according to claim 6, characterized in that the number of communicating pipes (14) is one and it is located in the middle of baffle (8), an umbrella-shaped cover (15) is located directly over communicating pipes (14), umbrella-shaped cover (15) and communicating pipes (14) are coaxially located and the diameter of its bottom is larger than the diameter of communicating pipes (14).
8. Compound fertilizer production system with simple structure as in claim 1, characterized in that two layers of upper nozzles (61) are arranged side by side up and down in the middle section (6), and the demister (62) is arranged between the two layers of upper nozzles (61).
9. The compound fertilizer production system with a simple structure as claimed in claim 1, wherein the drying tail gas and dust separating structure is a cyclone dust collector, and the cooling tail gas and dust separating structure is a bag type dust collector.
10. Compound fertilizer production system with simple structure as claimed in claim 1, characterized in that the medium liquid outlet (64), the process water recovery system and the sulfuric acid storage tank are connected with the top of the small circulation tank (3) through pipelines, and the bottom of the small circulation tank (3) is connected with the inlet of the upper circulation pump (10) through pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202120420016.3U CN214937113U (en) | 2021-02-26 | 2021-02-26 | Compound fertilizer production system with simple structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120420016.3U CN214937113U (en) | 2021-02-26 | 2021-02-26 | Compound fertilizer production system with simple structure |
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| CN214937113U true CN214937113U (en) | 2021-11-30 |
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| CN202120420016.3U Active CN214937113U (en) | 2021-02-26 | 2021-02-26 | Compound fertilizer production system with simple structure |
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2021
- 2021-02-26 CN CN202120420016.3U patent/CN214937113U/en active Active
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