CN215505528U - Evaporation system of ammonium nitrate production line - Google Patents
Evaporation system of ammonium nitrate production line Download PDFInfo
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- CN215505528U CN215505528U CN202121244325.6U CN202121244325U CN215505528U CN 215505528 U CN215505528 U CN 215505528U CN 202121244325 U CN202121244325 U CN 202121244325U CN 215505528 U CN215505528 U CN 215505528U
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Abstract
The utility model relates to an evaporation system of an ammonium nitrate production line. This evaporation system includes the flash tank, the one-level evaporimeter, the evaporation separator, first solution tank, second grade evaporimeter and second solution tank, the discharge gate of flash tank passes through the feed inlet intercommunication of pipeline and one-level evaporimeter, the gas outlet of one-level evaporimeter passes through the air inlet intercommunication of pipeline and evaporation separator, the liquid outlet of one-level evaporimeter passes through the feed inlet intercommunication of pipeline and first solution tank, the liquid outlet of evaporation separator and the feed inlet intercommunication of first solution tank, the discharge gate of first solution tank passes through the feed inlet intercommunication of conveying pipeline and second grade evaporimeter, be equipped with the delivery pump on the conveying pipeline, the discharge gate of second grade evaporimeter passes through the feed inlet intercommunication of pipeline and second solution tank, the one-level evaporimeter includes first casing and sets up the first heat transfer coil at first casing. Compared with the prior art, the method can fully utilize the energy generated by the ammonium nitrate production system, and has low energy consumption and high energy utilization rate.
Description
Technical Field
The utility model belongs to the technical field of ammonium nitrate production systems, and particularly relates to an evaporation system of an ammonium nitrate production line.
Background
Ammonium Nitrate (NH)4NO3) Is colorless and odorless transparent crystal or white crystal, is easy to dissolve in water, and is easy to absorb moisture and agglomerate. Ammonium nitrate has wide application in industrial and agricultural production and national defense, is a high-efficiency nitrogen solid fertilizer, can adapt to soil with various properties, and can not remain substances which can damage the soil fertility after nitrogen is absorbed by plants; meanwhile, ammonium nitrate is a water-soluble and quick-acting nitrogen fertilizer, is used as a base fertilizer and an additional fertilizer for crops, has obvious yield increase effect on various crops, is particularly suitable for grain crops such as wheat, paddy, corn and the like and economic crops such as vegetables, cotton, fruit trees and the like, and is one of ideal nitrogen fertilizers.
At present, the main production method of ammonium nitrate is to utilize nitric acid and ammonia to perform neutralization reaction under normal pressure to form dilute ammonium nitrate solution, then evaporate the dilute ammonium nitrate solution to obtain concentrated ammonium nitrate solution, and then perform crystallization granulation, cooling and other procedures to obtain ammonium nitrate products. However, the existing calcium ammonium nitrate solution evaporation system has the defects of high operation cost, high energy consumption, low energy utilization rate and the like.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems, the utility model provides an evaporation system of an ammonium nitrate production line, which aims to solve the technical problems of high energy consumption and low energy utilization rate of the existing ammonium nitrate evaporation system.
The utility model discloses an evaporation system of an ammonium nitrate production line, which adopts the technical scheme that:
an evaporation system of an ammonium nitrate production line comprises a flash tank, a first-stage evaporator, an evaporation separator, a first solution tank, a second-stage evaporator and a second solution tank, wherein a discharge port of the flash tank is communicated with a feed port of the first-stage evaporator through a pipeline, a gas outlet of the first-stage steam generator is communicated with a gas inlet of the evaporation separator through a pipeline, a liquid outlet of the first-stage evaporator is communicated with a feed port of the first solution tank through a pipeline, a liquid outlet of the evaporation separator is communicated with a feed port of the first solution tank, a discharge port of the first solution tank is communicated with a feed port of the second-stage evaporator through a feed pipe, a conveying pump is arranged on the feed pipe, a discharge port of the second-stage evaporator is communicated with a feed port of the second solution tank through a pipeline, the first-stage evaporator comprises a first shell and a first heat exchange coil arranged on the first shell, be equipped with on the first casing with first intake pipe and the first outlet duct of first heat exchange coil pipe both ends intercommunication, the second grade evaporimeter includes the second casing and sets up second heat exchange coil pipe in the second casing, be equipped with on the second casing with second intake pipe and the second outlet duct of second heat exchange coil pipe both ends intercommunication, the second intake pipe is kept away from the one end of second casing and air heater's gas outlet intercommunication, air heater's first air inlet and middling pressure steam conduit intercommunication, air heater's second air inlet and third intake duct intercommunication.
As a further improvement to the above technical solution, the first solution tank includes a tank body, the feed delivery pipe includes a trunk pipe and two branch pipes, two of the branch pipes are communicated with the trunk pipe through a three-way joint, two of the branch pipes are respectively provided with the delivery pump, two of the branch pipes are communicated with the lower end of the tank body, and the trunk pipe is communicated with the feed inlet of the second-stage evaporator.
As a further improvement to the technical scheme, the lower end of the groove body is provided with a discharge pipe.
As a further improvement to the technical scheme, an overflow pipe is arranged at the upper end of the groove body.
As a further improvement to the technical scheme, the gas outlet of the flash tank is communicated with the waste gas pipeline through a pipeline, and the gas outlet of the steam separator is communicated with the waste gas pipeline through a pipeline.
The utility model provides an evaporation system of an ammonium nitrate production line, which has the following beneficial effects compared with the prior art:
when the evaporation system of the ammonium nitrate production line is used, a dilute ammonium nitrate solution is added into the flash tank, the dilute ammonium nitrate solution is subjected to primary evaporation, the dilute ammonium nitrate solution flowing out of the flash tank enters the primary evaporator, and the primary evaporator is used for primary evaporation of the dilute ammonium nitrate solution. And the gas flowing out of the first-stage evaporator enters a steam separator, the liquid in the first-stage evaporator enters a first solution tank, and the ammonium nitrate separated by the steam separator enters the first solution tank. The ammonium nitrate solution in the first solution tank enters the secondary evaporator through the conveying pipe, and the ammonium nitrate solution further evaporated by the secondary evaporator enters the second solution tank. In the process, the high-temperature gas used in the first-stage evaporator is the high-temperature gas generated in the ammonium nitrate production line, and the high-temperature gas used in the second-stage evaporator is the high-temperature gas generated by heating medium-pressure steam and the high-temperature gas generated in the ammonium nitrate production line through an air heater. The first-stage evaporator carries out first-stage evaporation on the dilute ammonium nitrate solution, and the second-stage evaporator carries out middle-stage evaporation on the ammonium nitrate solution to obtain the required high-concentration ammonium nitrate solution. Compared with the prior art, the evaporation system of the ammonium nitrate production line can perform primary evaporation by using high-temperature gas generated by the nitric acid production system, perform secondary evaporation after heating the high-temperature gas, fully utilize energy generated by the ammonium nitrate production system, and has low energy consumption and high energy utilization rate.
Drawings
FIG. 1 is a schematic diagram of an evaporation system of an ammonium nitrate production line of the present invention;
FIG. 2 is an enlarged view of a portion of the schematic diagram of the evaporation system of the ammonium nitrate production line of FIG. 1;
reference numbers in the figures: 1. a flash tank; 2. a first-stage evaporator; 3. an evaporative separator; 4. a first solution tank; 5. a secondary evaporator; 6. a second solution tank; 7. an air heater; 8. a branch pipe; 9. a delivery pump; 10. a trunk pipe; 11. a discharge pipe; 12. an overflow pipe; 13. a trough body; 14. a stirring rod; 15. a first intake pipe; 16. a first air outlet pipe; 17. a second intake pipe; 18. a second air outlet pipe; 19. a medium pressure steam line; 20. and a third air inlet pipe.
Detailed Description
The utility model is described in further detail below with reference to the following figures and detailed description:
the embodiment of the evaporation system of the ammonium nitrate production line comprises a flash tank 1, a primary evaporator 2, an evaporation separator 3, a first solution tank 4, a secondary evaporator 5 and a second solution tank 6, wherein a discharge port of the flash tank 1 is communicated with a feed port of the primary evaporator 2 through a pipeline, an air outlet of the primary evaporator is communicated with an air inlet of the evaporation separator 3 through a pipeline, a liquid outlet of the primary evaporator 2 is communicated with a feed port of the first solution tank 4 through a pipeline, a liquid outlet of the evaporation separator 3 is communicated with a feed port of the first solution tank 4, a discharge port of the first solution tank 4 is communicated with a feed port of the secondary evaporator 5 through a feed pipe, the feed pipe is provided with a delivery pump 9, a discharge port of the secondary evaporator 5 is communicated with a feed port of the second solution tank 6 through a pipeline, the primary evaporator 2 comprises a first shell and a first heat exchange coil arranged in the first shell, the first shell is provided with a first air inlet pipe 15 and a first air outlet pipe 16 which are communicated with two ends of the first heat exchange coil, the second-stage evaporator 5 comprises a second shell and a second heat exchange coil arranged in the second shell, the second shell is provided with a second air inlet pipe 17 and a second air outlet pipe 18 which are communicated with two ends of the second heat exchange coil, and one end, far away from the second shell, of the second air inlet pipe 17 is communicated with the air heater 7. The air heater 7 comprises a shell, a heating element is arranged in the shell, and a first air inlet, a second air inlet and an air outlet are formed in the outer wall of the shell. Wherein, the first air inlet of the air heater 7 is communicated with the medium-pressure steam pipeline 19, the second air inlet of the air heater 7 is communicated with the second air inlet pipe 17, and the air outlet of the air heater 7 is communicated with the third air inlet pipe 20.
In this embodiment, the first solution tank 4 includes a tank body 13, a stirring rod 14 is assembled in the tank body 13 in a rotating manner, and a driving motor for driving the stirring rod to rotate is fixedly connected to the upper end of the tank body. The inside of cell body installs the coil pipe of arranging along cell body circumference, is connected with the pipeline with the coil pipe intercommunication on the cell body for heat the inside solution of cell body. The conveying pipeline comprises a trunk pipeline 10 and two branch pipelines 8, the two branch pipelines 8 are communicated with the trunk pipeline 10 through three-way joints, conveying pumps 9 are respectively arranged on the two branch pipelines 8, the end parts of the two branch pipelines 8 are communicated with the lower end of the groove body, and the trunk pipeline 10 is communicated with a feed inlet of the second-stage evaporator 5. The lower end of the tank body is provided with a discharge pipe 11, and the upper end of the tank body is provided with an overflow pipe 12. The lower end of the first solution tank 4 is provided with a collection tank into which the lower end of a discharge pipe 11 is inserted, and the lower end of an overflow pipe 12 is communicated with the discharge pipe 11.
In this embodiment, second solution tank 6 includes the cell body, and the drain pipe is installed to the lower extreme of cell body, and the inside of cell body is rotated and is equipped with the stirring rod, fixedly connected with drive on the cell body stirring rod pivoted driving motor. The tank body is internally provided with a coil pipe which is arranged along the circumferential direction of the tank body in a ring mode, and the tank body is provided with a pipeline communicated with the coil pipe and used for heating the solution in the tank body.
In this embodiment, the gas outlet of the flash tank 1 is communicated with the waste gas pipeline through a pipeline, and the gas outlet of the steam separator is communicated with the waste gas pipeline through a pipeline.
When the evaporation system of the ammonium nitrate production line is used, a dilute ammonium nitrate solution is added into the flash tank 1, the dilute ammonium nitrate solution is subjected to primary evaporation, the dilute ammonium nitrate solution flowing out of the flash tank 1 enters the primary evaporator 2, and the primary evaporator 2 is used for primary evaporation of the dilute ammonium nitrate solution. The gas flowing out of the first-stage evaporator 2 enters a steam separator, the liquid in the first-stage evaporator 2 enters the first solution tank 4, and the ammonium nitrate separated by the steam separator enters the first solution tank 4. The ammonium nitrate solution in the first solution tank 4 enters the secondary evaporator 5 through the feed delivery pipe, and the ammonium nitrate solution further evaporated by the secondary evaporator 5 enters the second solution tank 6. In the process, the high-temperature gas used in the first-stage evaporator 2 is the high-temperature gas generated in the ammonium nitrate production line, and the high-temperature gas used in the second-stage evaporator 5 is the high-temperature gas generated by heating medium-pressure steam and the high-temperature gas generated in the ammonium nitrate production line by the air heater 7. The first-stage evaporator 2 performs first-stage evaporation on the dilute ammonium nitrate solution, and the second-stage evaporator 5 performs middle-stage evaporation on the ammonium nitrate solution to obtain the required high-concentration ammonium nitrate solution.
The utility model provides an evaporation system of an ammonium nitrate production line, which has the following advantages compared with the prior art: the evaporation system of the ammonium nitrate production line can perform primary evaporation by using high-temperature gas generated by the nitric acid production system, perform secondary evaporation after heating the high-temperature gas, fully utilize energy generated by the ammonium nitrate production system, and has low energy consumption and high energy utilization rate.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The evaporation system of the ammonium nitrate production line is characterized by comprising a flash tank, a first-stage evaporator, an evaporation separator, a first solution tank, a second-stage evaporator and a second solution tank, wherein a discharge port of the flash tank is communicated with a feed inlet of the first-stage evaporator through a pipeline, a gas outlet of the first-stage evaporator is communicated with a gas inlet of the evaporation separator through a pipeline, a liquid outlet of the first-stage evaporator is communicated with a feed inlet of the first solution tank through a pipeline, a liquid outlet of the evaporation separator is communicated with a feed inlet of the first solution tank, a discharge port of the first solution tank is communicated with a feed inlet of the second-stage evaporator through a feed delivery pipe, a delivery pump is arranged on the feed delivery pipe, a discharge port of the second-stage evaporator is communicated with a feed inlet of the second solution tank through a pipeline, the first-stage evaporator comprises a first shell and a first heat exchange coil pipe arranged on the first shell, be equipped with on the first casing with first intake pipe and the first outlet duct of first heat exchange coil pipe both ends intercommunication, the second grade evaporimeter includes the second casing and sets up second heat exchange coil pipe in the second casing, be equipped with on the second casing with second intake pipe and the second outlet duct of second heat exchange coil pipe both ends intercommunication, the second intake pipe is kept away from the one end of second casing and air heater's gas outlet intercommunication, air heater's first air inlet and middling pressure steam conduit intercommunication, air heater's second air inlet and third intake duct intercommunication.
2. The evaporation system of ammonium nitrate production line of claim 1, wherein the first solution tank comprises a tank body, the feed delivery pipe comprises a trunk pipe and two branch pipes, two branch pipes are communicated with the trunk pipe through a tee joint, the two branch pipes are respectively provided with the delivery pump, the end parts of the two branch pipes are communicated with the lower end of the tank body, and the trunk pipe is communicated with the feed inlet of the second-stage evaporator.
3. The evaporation system of ammonium nitrate production line as claimed in claim 2, characterized in that the lower end of the tank body is provided with a discharge pipe.
4. The evaporation system of ammonium nitrate production line of claim 3, characterized in that, the upper end of the trough body is provided with an overflow pipe.
5. The evaporation system of ammonium nitrate production line of claim 1, wherein the gas outlet of the flash tank is communicated with the waste gas pipeline through a pipeline, and the gas outlet of the steam separator is communicated with the waste gas pipeline through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121244325.6U CN215505528U (en) | 2021-06-04 | 2021-06-04 | Evaporation system of ammonium nitrate production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121244325.6U CN215505528U (en) | 2021-06-04 | 2021-06-04 | Evaporation system of ammonium nitrate production line |
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| Publication Number | Publication Date |
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| CN215505528U true CN215505528U (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121244325.6U Active CN215505528U (en) | 2021-06-04 | 2021-06-04 | Evaporation system of ammonium nitrate production line |
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| CN (1) | CN215505528U (en) |
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2021
- 2021-06-04 CN CN202121244325.6U patent/CN215505528U/en active Active
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