CN220852787U - Ammonia cooling system of ammonia refrigerating device - Google Patents
Ammonia cooling system of ammonia refrigerating device Download PDFInfo
- Publication number
- CN220852787U CN220852787U CN202322615838.9U CN202322615838U CN220852787U CN 220852787 U CN220852787 U CN 220852787U CN 202322615838 U CN202322615838 U CN 202322615838U CN 220852787 U CN220852787 U CN 220852787U
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- Prior art keywords
- ammonia
- communicated
- water
- shell side
- stage cooler
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 218
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 90
- 238000001816 cooling Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000000498 cooling water Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 9
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Sorption Type Refrigeration Machines (AREA)
Abstract
The utility model discloses an ammonia cooling system of an ammonia refrigerating device, which comprises an ammonia compressor; the ammonia outlet of the ammonia compressor is communicated with the shell side inlet of the final stage cooler, the shell side outlet of the final stage cooler is respectively communicated with the shell side inlets of the three water condensers through ammonia pipelines, and the shell side outlets of the water condensers are respectively communicated with the liquid inlet of the ammonia collecting tank through liquid ammonia pipelines; the shell side outlet of the final-stage cooler is provided with a temperature sensor, the circulating water return pipe is provided with a temperature control valve, the temperature sensor is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the temperature control valve. The advantages are that: the temperature of the ammonia gas cooled by the final-stage cooler is detected in real time through the temperature sensor and fed back to the controller, when the detected temperature is higher than the set upper limit value, the opening of the temperature control valve is controlled through the controller, the flow of circulating water is increased, the temperature of the ammonia gas discharged is further controlled, and the ammonia gas condensation effect is ensured.
Description
Technical field:
The utility model relates to the technical field of synthetic ammonia production, in particular to an ammonia cooling system of an ammonia refrigerating device.
The background technology is as follows:
Ammonia refrigeration is an important process in the production process of synthetic ammonia, and the ammonia refrigeration device comprises an ammonia compressor, a water condenser and an ammonia collecting tank and is used for separating ammonia gas discharged from an ammonia synthesis tower from hydrogen gas and nitrogen gas; the temperature of ammonia gas at the outlet of the ammonia compressor set is 135.5 ℃, the ammonia gas is cooled to 50 ℃ through a final cooler at the outlet of the ammonia compressor set, then the ammonia gas is subjected to heat exchange with circulating water through a water condenser to be cooled to 25 ℃, and the ammonia gas is condensed into liquid ammonia and then enters an ammonia collecting tank.
However, due to the fact that the design allowance of the heat exchange area of the water condenser is smaller, in summer, under the conditions that the wall of the heat exchange pipe of the water condenser is scaled at the end of the device operation, and the like, the temperature of ammonia actually exiting the water condenser is up to 41 ℃, part of ammonia cannot be condensed, the pressure of an ammonia compressor and an ammonia refrigerating system is increased, so that the load of the ammonia compressor is higher, the steam consumption is increased, the refrigerating effect is reduced, the ammonia content at the inlet of a synthesis tower is higher, the conversion rate of synthesis gas entering the tower is reduced while the net value of ammonia is reduced, the circulation gas amount of the synthesis compressor is increased, the steam consumption of a steam turbine is increased, and the system load is lower.
The utility model comprises the following steps:
The utility model aims to provide an ammonia cooling system of an ammonia refrigerating device, which is favorable for ensuring the ammonia condensing effect so as to reduce energy consumption.
The utility model is implemented by the following technical scheme: an ammonia cooling system of an ammonia refrigerating device comprises an ammonia compressor, a final-stage cooler, an ammonia collecting tank and three water condensers which are connected in parallel; the ammonia gas outlet of the ammonia compressor is communicated with the shell side inlets of the final-stage cooler, the shell side outlets of the final-stage cooler are respectively communicated with the shell side inlets of the three water condensers through ammonia pipelines, and the shell side outlets of the water condensers are respectively communicated with the liquid inlet of the ammonia collecting tank through liquid ammonia pipelines; the tube side inlets of the water condensers are all communicated with a cooling water inlet tube, and the tube side outlets of the water condensers are all communicated with a cooling water outlet tube; the tube side inlet of the final stage cooler is communicated with a circulating water feeding pipe, the tube side outlet of the final stage cooler is communicated with a circulating water return pipe, a temperature sensor is arranged at the shell side outlet of the final stage cooler, the circulating water return pipe is provided with a temperature control valve, the temperature sensor is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the temperature control valve.
Further, an exhaust port at the top of the tail end of the shell side of the water condenser is communicated with the ammonia collecting tank through a tail gas pipeline, a chiller is installed at the top of the ammonia collecting tank in a communicated mode, one end of a tube side of the chiller is communicated with the ammonia collecting tank, the other end of the tube side of the chiller is communicated with a blow-down tube, and a blow-down valve is installed on the blow-down tube.
Further, install the thermometer on the liquid ammonia pipeline, ammonia pipeline with all install 8 word blind plates and lead to drench blowoff valve on the liquid ammonia pipeline.
The utility model has the advantages that: the temperature of the ammonia gas cooled by the final-stage cooler is detected in real time through the temperature sensor and fed back to the controller, when the detected temperature is higher than the set upper limit value, the opening of the temperature control valve is controlled through the controller, the flow of circulating water is increased, the temperature of the ammonia gas discharged is further controlled, and the ammonia gas condensation effect is ensured.
In summer, the three water condensers can be operated in parallel to cool down and condense ammonia, and in winter, the two water condensers can be operated in parallel to reduce the temperature of liquid ammonia at the outlet of the water condensers to 25-30 ℃, so that the load of the ammonia compressor is reduced, the steam consumption is reduced, the refrigerating effect of an ammonia refrigerating system is improved, the ammonia content of an incoming tower is reduced, the conversion rate of synthetic gas is improved, and the ammonia output is increased while the ammonia is prevented from being condensed and from escaping; and sending the condensed liquid ammonia into an ammonia collecting tank.
Description of the drawings:
Fig. 1 is a schematic structural view of the present utility model.
The components in the drawings are marked as follows: the ammonia compressor 1, the final stage cooler 2, the water condenser 3, the ammonia collecting tank 4, the ammonia pipeline 5, the liquid ammonia pipeline 6, the cooling water inlet pipe 7, the cooling water outlet pipe 8, the circulating water inlet pipe 9, the circulating water return pipe 10, the temperature sensor 11, the temperature control valve 12, the controller 13, the tail gas pipeline 14, the chiller 15, the blow-down pipe 16, the blow-down valve 17, the thermometer 18, the 8-shaped blind plate 19 and the water guiding and draining valve 20.
The specific embodiment is as follows:
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the present embodiment provides an ammonia cooling system of an ammonia refrigerating device, which comprises an ammonia compressor 1, a final stage cooler 2, an ammonia collecting tank 4 and three water condensers 3 connected in parallel; the ammonia gas outlet of the ammonia compressor 1 is communicated with the shell side inlet of the final cooler 2, and the shell side outlet of the final cooler 2 is respectively communicated with the shell side inlets of the three water condensers 3 through an ammonia gas pipeline 5; the tube side inlet of the final stage cooler 2 is communicated with a circulating water upper water pipe 9, the tube side outlet of the final stage cooler 2 is communicated with a circulating water return water pipe 10, ammonia gas discharged by the ammonia compressor 1 is sent into the final stage cooler 2, cooled by circulating water, and the cooled ammonia gas is sent into the three water condensers 3.
A temperature sensor 11 is arranged at the shell side outlet of the final-stage cooler 2, a temperature control valve 12 is arranged on the circulating water return pipe 10, the temperature sensor 11 is electrically connected with the input end of a controller 13, and the output end of the controller 13 is electrically connected with the temperature control valve 12; the temperature of the ammonia gas cooled by the final-stage cooler 2 is detected in real time through the temperature sensor 11 and fed back to the controller 13, when the detected temperature is higher than the set upper limit value, the opening of the temperature control valve 12 is controlled through the controller 13, the flow of circulating water is increased, the temperature of the ammonia gas discharged is further controlled, and the ammonia gas condensation effect is ensured.
The shell side outlets of the water condensers 3 are respectively communicated with the liquid inlet of the ammonia collecting tank 4 through a liquid ammonia pipeline 6; the tube side inlets of the water condensers 3 are all communicated with a cooling water inlet tube 7, and the tube side outlets of the water condensers 3 are all communicated with a cooling water outlet tube 8; in summer, the three water condensers 3 can be operated in parallel to cool down and condense ammonia, and in winter, the two water condensers 3 can be operated in parallel to reduce the temperature of liquid ammonia at the outlet of the water condenser 3 to 25-30 ℃, so that the load of the ammonia compressor 1 is reduced, the steam consumption is reduced, the refrigerating effect of an ammonia refrigerating system is improved, the ammonia content of an incoming tower is reduced, the conversion rate of synthetic gas is improved, and the ammonia yield is increased while the phenomenon that ammonia cannot be condensed and is leaked is avoided; the condensed liquid ammonia is fed into an ammonia collecting tank 4.
A thermometer 18 is arranged on the liquid ammonia pipeline 6, and an 8-shaped blind plate 19 and a shower guide and drain valve 20 are arranged on the ammonia pipeline 5 and the liquid ammonia pipeline 6; judging the scaling conditions of the three water condensers 3 according to the temperature of the liquid ammonia discharged by the corresponding water condensers 3 detected by the thermometer 18 at the end of the device operation, and indicating scaling phenomenon and influencing the heat exchange effect when the detected temperature exceeds the process requirement value; at this time, the corresponding 8-shaped blind plate 19 is inserted and the shower drain valve 20 is opened to isolate the corresponding water condenser 3 so as to facilitate cleaning; and the device is put into use after being cleaned, so that the cooling effect is ensured, and the stable operation of the device with high yield and low consumption is ensured.
The top exhaust port at the tail end of the shell side of the water condenser 3 is communicated with the ammonia collecting tank 4 through a tail gas pipeline 14, a chiller 15 is arranged at the top of the ammonia collecting tank 4 in a communicated manner, one end of the tube side of the chiller 15 is communicated with the ammonia collecting tank 4, the other end of the tube side of the chiller 15 is communicated with a blow-down tube 16, and a blow-down valve 17 is arranged on the blow-down tube 16; after the uncooled tail gas in the water condenser 3 is sent into the ammonia collecting tank 4 through the tail gas pipeline 14, the uncooled tail gas enters the chiller 15, the rest ammonia in the tail gas is cooled down and cooled, the condensed liquid ammonia flows back into the ammonia collecting tank 4, and the uncooled waste gas is discharged into a torch system through the blow-down pipe 16.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (3)
1. An ammonia cooling system of an ammonia refrigerating device is characterized by comprising an ammonia compressor, a final-stage cooler, an ammonia collecting tank and three water condensers which are connected in parallel;
The ammonia gas outlet of the ammonia compressor is communicated with the shell side inlets of the final-stage cooler, the shell side outlets of the final-stage cooler are respectively communicated with the shell side inlets of the three water condensers through ammonia pipelines, and the shell side outlets of the water condensers are respectively communicated with the liquid inlet of the ammonia collecting tank through liquid ammonia pipelines; the tube side inlets of the water condensers are all communicated with a cooling water inlet tube, and the tube side outlets of the water condensers are all communicated with a cooling water outlet tube;
The tube side inlet of the final stage cooler is communicated with a circulating water feeding pipe, the tube side outlet of the final stage cooler is communicated with a circulating water return pipe, a temperature sensor is arranged at the shell side outlet of the final stage cooler, the circulating water return pipe is provided with a temperature control valve, the temperature sensor is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the temperature control valve.
2. The ammonia chilling device ammonia cooling system according to claim 1, wherein an exhaust port at the top of the tail end of the shell side of the water condenser is communicated with the ammonia collecting tank through an exhaust pipeline, a chiller is installed at the top of the ammonia collecting tank in a communicated mode, one end of a tube side of the chiller is communicated with the ammonia collecting tank, the other end of the tube side of the chiller is communicated with a blow-down tube, and a blow-down valve is installed on the blow-down tube.
3. The ammonia cooling system of an ammonia refrigerating device according to claim 1, wherein a thermometer is installed on the liquid ammonia pipeline, and an 8-word blind plate and a shower drain valve are installed on the ammonia pipeline and the liquid ammonia pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322615838.9U CN220852787U (en) | 2023-09-26 | 2023-09-26 | Ammonia cooling system of ammonia refrigerating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322615838.9U CN220852787U (en) | 2023-09-26 | 2023-09-26 | Ammonia cooling system of ammonia refrigerating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220852787U true CN220852787U (en) | 2024-04-26 |
Family
ID=90785340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322615838.9U Active CN220852787U (en) | 2023-09-26 | 2023-09-26 | Ammonia cooling system of ammonia refrigerating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220852787U (en) |
-
2023
- 2023-09-26 CN CN202322615838.9U patent/CN220852787U/en active Active
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