Device for reducing electricity consumption of ammonia synthesis ice maker

Abstract

The utility model discloses a device for reducing electricity consumption of an ammonia synthesis ice maker, which comprises a circulating water cooler, one end of the circulating water cooler is connected with a liquid ammonia evaporator, one end of the liquid ammonia evaporator is connected with a liquid ammonia cooler, and the outlet end of the liquid ammonia cooler is connected with a gas ammonia pressurization ice maker. The device solves the problems of large ice machine consumption and high cost in the ammonia synthesis device in the prior art; the method has the characteristics of effectively reducing the cooling capacity consumption in the ammonia synthesis process and reducing the energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of ammonia synthesis equipment technology, and in particular to a device for reducing the power consumption of an ammonia synthesis ice machine. Background Technology

[0002] Ammonia synthesis is typically the last stage in a synthetic ammonia plant. Since the gaseous ammonia produced in the synthesis reaction needs to be cooled into a liquid product, liquid ammonia is used as a coolant during the cooling process. After being heated and vaporized, the liquid ammonia is generally pressurized by an ice machine and condensed back into a liquid state. Therefore, the ice machine is also a major energy-consuming device in a synthetic ammonia plant. Furthermore, the ice machine also serves to deliver gaseous ammonia to users. Reducing the electricity consumption of the ice machine significantly reduces the electricity consumption per ton of ammonia in synthetic ammonia production. Therefore, it is necessary to design a device to reduce the electricity consumption of the ice machine in ammonia synthesis to solve the aforementioned technical problems. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a device for reducing the power consumption of ice machines in ammonia synthesis, aiming to solve the problem of large ice machine consumption and high cost in existing ammonia synthesis devices; it has the characteristics of effectively reducing the cooling consumption in the ammonia synthesis process and reducing energy consumption.

[0004] To achieve the above-mentioned technical effects, the technical solution adopted by this utility model is as follows:

[0005] A device for reducing the power consumption of an ammonia synthesis ice machine includes a circulating water cooler, one end of which is connected to a liquid ammonia evaporator, one end of which is connected to the liquid ammonia cooler, and the outlet end of the liquid ammonia cooler is connected to a gaseous ammonia pressurized ice machine.

[0006] Preferably, the gaseous ammonia pressurized ice machine is connected to the tail end of the device to generate gaseous ammonia dephosphater compound fertilizer.

[0007] Preferably, a branch pipe is connected to the pipeline between the gaseous ammonia pressurized ice machine and the tail end of the device. The branch pipe is connected to the gaseous ammonia condenser, and the outlet end of the gaseous ammonia condenser delivers liquid ammonia back to the inlet end of the liquid ammonia cooler.

[0008] Preferably, in an ammonia synthesis unit, the liquid ammonia evaporator is installed on the outlet gas pipeline of the circulating water cooler.

[0009] Preferably, the bottom of the liquid ammonia evaporator is equipped with a self-regulating liquid ammonia addition function.

[0010] Preferably, the outlet of the liquid ammonia cooler is also connected to the hydrogen ammonia gas recirculation machine.

[0011] Preferably, gaseous ammonia is transported from the outlet of the liquid ammonia evaporator to the tail end of the device to generate gaseous ammonia dephosphater compound fertilizer.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] By reducing the cooling load on the ammonia cooler and decreasing the amount of liquid ammonia added and the amount of gaseous ammonia evaporated, and by simultaneously cooling through the ammonia evaporator and ammonia cooler, better heat exchange efficiency is achieved. Using liquid ammonia for heat exchange with circulating hydrogen and nitrogen gas, the evaporated gaseous ammonia has a high pressure and is directly delivered to the user, saving electricity used for external ammonia delivery from the ice machine. The reduction in inlet gaseous ammonia in the ice machine lowers the load on the ice machine's ammonia recovery system, resulting in reduced electricity consumption. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] In the diagram: 1. Circulating water cooler; 2. Liquid ammonia evaporator; 3. Liquid ammonia self-regulating unit; 4. Liquid ammonia cooler; 5. Gaseous ammonia pressurized ice machine; 6. Gaseous ammonia condenser. Detailed Implementation

[0016] Example 1:

[0017] like Figure 1 As shown, a device for reducing the power consumption of an ammonia synthesis ice machine includes a circulating water cooler 1, one end of which is connected to a liquid ammonia evaporator 2, one end of which is connected to a liquid ammonia cooler 4, and the outlet end of the liquid ammonia cooler 4 is connected to a gaseous ammonia pressurized ice machine 5.

[0018] Preferably, the gaseous ammonia pressurized ice machine 5 is connected to the tail end of the device to generate gaseous ammonia dephosphater compound fertilizer.

[0019] Preferably, a branch pipe is connected to the pipeline between the gaseous ammonia pressurized ice machine 5 and the tail end of the device. The branch pipe is connected to the gaseous ammonia condenser 6, and the outlet end of the gaseous ammonia condenser 6 delivers liquid ammonia back to the inlet end of the liquid ammonia cooler 4.

[0020] Preferably, in an ammonia synthesis unit, the liquid ammonia evaporator 2 is installed on the outlet gas pipeline of the circulating water cooler 1.

[0021] Preferably, the bottom of the liquid ammonia evaporator 2 is equipped with a liquid ammonia self-regulating device 3.

[0022] Preferably, the outlet of the liquid ammonia cooler 4 is also connected to the hydrogen ammonia gas recirculation machine.

[0023] Preferably, gaseous ammonia is transported from the outlet end of the liquid ammonia evaporator 2 to the tail end of the device to generate gaseous ammonia dephosphater compound fertilizer.

[0024] Furthermore, the liquid ammonia evaporator 2 can reduce the temperature of the gas at the outlet of the circulating water cooler 1 from about 35°C to about 20°C.

[0025] Furthermore, the process hydrogen and nitrogen gas at the outlet of the liquid ammonia evaporator 2 is connected to the liquid ammonia cooler 4. After the temperature of the gas at the inlet of the liquid ammonia cooler 4 is reduced, the amount of ammonia evaporation can be reduced, thereby reducing the power consumption of the ice machine.

[0026] Furthermore, the bottom of the liquid ammonia evaporator 2 is equipped with a liquid ammonia self-regulating device 3 to control the amount of liquid ammonia added to the liquid ammonia evaporator 2.

[0027] Furthermore, the gaseous ammonia at the outlet of the liquid ammonia cooler 4 is recovered to the gaseous ammonia pressurized ice machine 5, which then pressurizes and recovers the gaseous ammonia or sends it to the user.

[0028] Furthermore, the gaseous ammonia from the outlet of the gaseous ammonia pressurized ice machine 5 is connected to the gaseous ammonia condenser 6, condensed into liquid ammonia, and then added to the liquid ammonia cooler 4.

[0029] Furthermore, the gaseous ammonia at the outlet of liquid ammonia cooler 4 is around 0.6 MPa, which can be directly sent to phosphate compound fertilizer without going through an icing machine.

[0030] Furthermore, the amount of ammonia supplied by the liquid ammonia cooler 4 can be adjusted by the liquid ammonia self-adjustment control 3.

[0031] Example 2:

[0032] The working principle of this patent is as follows:

[0033] A liquid ammonia evaporator 2 is connected in series after the circulating water cooler 1. Liquid ammonia exchanges heat with the circulating hydrogen and nitrogen gas, lowering the temperature of the circulating hydrogen and nitrogen gas. This, in turn, lowers the temperature of the hydrogen and nitrogen gas entering the liquid ammonia cooler 4, reducing the amount of gaseous ammonia evaporated in the liquid ammonia cooler 4, and consequently reducing the amount of gaseous ammonia entering the pressurized ice machine 5 and its operating load. The gaseous ammonia evaporated by the liquid ammonia evaporator 2 is directly delivered to the user.

Claims

1. A device for reducing the power consumption of an ammonia synthesis ice machine, characterized in that: It includes a circulating water cooler (1), one end of which is connected to a liquid ammonia evaporator (2), one end of which is connected to a liquid ammonia cooler (4), and the outlet end of the liquid ammonia cooler (4) is connected to a gaseous ammonia pressurized ice machine (5).

2. The device for reducing the power consumption of an ammonia synthesis ice machine according to claim 1, characterized in that: A gaseous ammonia pressurized ice machine (5) is connected to the tail end of the device to generate gaseous ammonia dephosphater compound fertilizer.

3. The device for reducing the power consumption of an ammonia synthesis ice machine according to claim 2, characterized in that: A branch pipe is connected to the pipeline between the gaseous ammonia pressurized ice machine (5) and the end of the device. The branch pipe is connected to the gaseous ammonia condenser (6). The outlet end of the gaseous ammonia condenser (6) delivers liquid ammonia back to the inlet end of the liquid ammonia cooler (4).

4. The device for reducing the power consumption of an ammonia synthesis ice machine according to claim 2, characterized in that: For ammonia synthesis units, the liquid ammonia evaporator (2) is installed on the outlet gas pipeline of the circulating water cooler (1).

5. The device for reducing the power consumption of an ammonia synthesis ice machine according to claim 1, characterized in that: The bottom of the liquid ammonia evaporator (2) is equipped with a liquid ammonia self-regulating device (3).

6. The device for reducing the power consumption of an ammonia synthesis ice machine according to claim 1, characterized in that: The outlet of the liquid ammonia cooler (4) is also connected to the hydrogen ammonia gas recirculation machine.

7. The device for reducing the power consumption of an ammonia synthesis ice machine according to claim 1, characterized in that: The outlet end of the liquid ammonia evaporator (2) delivers gaseous ammonia to the tail end of the device to generate gaseous ammonia dephosphorization compound fertilizer.

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