Liquid ammonia filling and unloading device

Abstract

The utility model discloses a kind of liquid ammonia filling and unloading device, including compressor, ice machine system, liquid ammonia unloading universal crane pipe and tank car;The ice machine system includes ammonia condenser, liquid ammonia storage tank and power saver;The compressor is connected with the ammonia condenser, the ammonia condenser is connected with the liquid ammonia storage tank, the liquid ammonia storage tank is connected with the power saver, the power saver is connected with the ammonia cooler of low-temperature methanol washing system, the ammonia cooler of low-temperature methanol washing system is connected with the compressor;The power saver is connected with the tank car through liquid ammonia unloading universal crane pipe. Advantage is: simple operation process can effectively guarantee the safety and high efficiency in the filling, unloading process of liquid ammonia.

Description

Technical Field

[0001] This utility model relates to the field of liquid ammonia filling and unloading technology, and in particular to a liquid ammonia filling and unloading device. Background Technology

[0002] Liquid ammonia is widely used in the modern coal chemical industry. However, its production and use are often located at different sites. Therefore, liquid ammonia filling and unloading are common in ammonia production and refrigeration processes. Ammonia is a colorless, toxic gas with a pungent odor. Safety is paramount in all ammonia-related production operations.

[0003] The start-up and shutdown processes and daily losses in ammonia refrigeration systems require the periodic replenishment of liquid ammonia. Furthermore, liquid ammonia needs to be transported to tank trucks during sales and system maintenance. Currently, liquid ammonia filling and unloading methods are often unidirectional, resulting in cumbersome procedures and inefficient safety monitoring. There is an urgent need for a device that integrates multiple functions, including liquid ammonia filling and unloading, to effectively ensure safety and efficiency during these processes. Utility Model Content

[0004] The purpose of this invention is to provide a liquid ammonia filling and unloading device, thereby solving the aforementioned problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A liquid ammonia filling and unloading device includes a compressor, an icing system, a liquid ammonia unloading universal arm, and a tank truck; the icing system includes an ammonia condenser, a liquid ammonia storage tank, and an energy-saving device; the compressor is connected to the ammonia condenser, the ammonia condenser is connected to the liquid ammonia storage tank, the liquid ammonia storage tank is connected to the energy-saving device, the energy-saving device is connected to the ammonia cooler of a low-temperature methanol washing system, and the ammonia cooler of the low-temperature methanol washing system is connected to the compressor; the energy-saving device is connected to the tank truck via the liquid ammonia unloading universal arm.

[0007] Preferably, the device includes two refrigeration systems, namely refrigeration system A and refrigeration system B. Refrigeration system A includes an ammonia condenser A, an economizer A, and a liquid ammonia storage tank A that maintains a high liquid level. Refrigeration system B includes an ammonia condenser B, an economizer B, and a liquid ammonia storage tank B that maintains a low liquid level. The compressor is connected to the ammonia condenser A and the ammonia condenser B. The ammonia condenser A and the ammonia condenser B are respectively connected to the liquid ammonia storage tank A and the liquid ammonia storage tank B. The liquid ammonia storage tank A and the liquid ammonia storage tank B are respectively connected to the economizer A and the economizer B. The economizer A and the economizer B are respectively connected to the ammonia cooler A and the ammonia cooler B of the low-temperature methanol washing system. The ammonia cooler A and the ammonia cooler B of the low-temperature methanol washing system are connected to the compressor. The economizer B is connected to the tank truck via a liquid ammonia unloading universal arm.

[0008] Preferably, the power-saving device B is connected to a temporary pipeline via a drain valve, and a liquid ammonia unloading universal arm is installed at the end of the temporary pipeline, which is connected to the tank truck.

[0009] Preferably, both liquid ammonia storage tank A and liquid ammonia storage tank B are connected to a liquid ammonia replenishment pipeline.

[0010] The beneficial effects of this invention are: 1. The operation process is simple, effectively ensuring the safety and efficiency of liquid ammonia filling and unloading. 2. Compared with the original operation, the device can unload the remaining liquid ammonia to a tank truck for disposal, avoiding waste of liquid ammonia and saving production costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the liquid ammonia filling and unloading device in an embodiment of this utility model. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0013] like Figure 1 As shown in this embodiment, a liquid ammonia filling and unloading device is provided, including a compressor, an icing system, a liquid ammonia unloading universal arm, and a tank truck; the icing system includes an ammonia condenser, a liquid ammonia storage tank, and an energy-saving device; the compressor is connected to the ammonia condenser, the ammonia condenser is connected to the liquid ammonia storage tank, the liquid ammonia storage tank is connected to the energy-saving device, the energy-saving device is connected to the ammonia cooler of a low-temperature methanol washing system, and the ammonia cooler of the low-temperature methanol washing system is connected to the compressor; the energy-saving device is connected to the tank truck via the liquid ammonia unloading universal arm.

[0014] Specifically, the device includes two refrigeration systems, namely refrigeration system A and refrigeration system B. Refrigeration system A includes an ammonia condenser A, an economizer A, and a liquid ammonia storage tank A that maintains a high liquid level. Refrigeration system B includes an ammonia condenser B, an economizer B, and a liquid ammonia storage tank B that maintains a low liquid level. The compressor is connected to the ammonia condenser A and the ammonia condenser B. The ammonia condenser A and the ammonia condenser B are respectively connected to the liquid ammonia storage tank A and the liquid ammonia storage tank B. The liquid ammonia storage tank A and the liquid ammonia storage tank B are respectively connected to the economizer A and the economizer B. The economizer A and the economizer B are respectively connected to the ammonia cooler A and the ammonia cooler B of the low-temperature methanol washing system. The ammonia cooler A and the ammonia cooler B of the low-temperature methanol washing system are connected to the compressor. The economizer B is connected to a temporary pipeline via a drain valve. A liquid ammonia unloading universal arm is installed at the end of the temporary pipeline, and the liquid ammonia unloading universal arm is connected to the tank truck.

[0015] In this embodiment, both liquid ammonia storage tank A and liquid ammonia storage tank B are connected to replenishing liquid ammonia pipelines.

[0016] In this embodiment, the icing system provides cooling capacity to the cryogenic methanol washing system during normal production. In the icing system, liquid ammonia in liquid ammonia storage tanks A and B is sent to ammonia coolers A and B in the cryogenic methanol washing system through power savers A and B, respectively. The gaseous ammonia from ammonia coolers A and B is then compressed by a compressor, and after compression, it is cooled by ammonia condensers A and B and stored in liquid ammonia storage tanks A and B. This process is continuously repeated, providing a continuous cooling capacity to the cryogenic methanol washing system.

[0017] When the ice machine system is shut down for maintenance, the liquid ammonia stored in the ice machine system needs to be unloaded into a tank truck. A temporary pipeline is connected after the drain valve at the bottom of the economizer B. The temporary pipeline is led to a designated open area, and a liquid ammonia unloading universal loading arm is installed at the end of the temporary pipeline. The liquid ammonia unloading universal loading arm is connected to the tank truck. By pressurizing the liquid ammonia storage tank B, the liquid ammonia is pressed into the economizer B using the pressure difference, and then sent to the tank truck through the temporary preparation pipeline.

[0018] When the liquid ammonia in the ice machine system is lost naturally and needs to be replenished, liquid ammonia is sent to liquid ammonia storage tanks A and B in the ice machine system through the replenishment liquid ammonia pipeline.

[0019] In this embodiment, the device significantly reduces the waste of liquid ammonia compared to the original operation. The original operation involved controlling the liquid ammonia storage tanks of two refrigeration systems: one maintained at the high limit and the other at the low limit. Excess liquid ammonia was stored as much as possible in the ammonia cooler of the cryogenic methanol washing system, while the liquid ammonia in the low-limit storage tank B was drained and burned through a flare. Compared to the original operation, this liquid ammonia filling and unloading device can unload the remaining liquid ammonia in the low-limit storage tank B to a tank truck for disposal, avoiding waste and saving production costs.

[0020] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0021] This invention provides a liquid ammonia filling and unloading device. The operation is simple and effectively ensures safety and efficiency during the filling and unloading process. Compared to traditional methods, this device can unload excess liquid ammonia into tank trucks, avoiding waste and saving production costs.

[0022] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A liquid ammonia filling and unloading device, characterized in that: The system includes a compressor, an ice machine system, a liquid ammonia unloading universal arm, and a tank truck. The ice machine system includes an ammonia condenser, a liquid ammonia storage tank, and an energy-saving device. The compressor is connected to the ammonia condenser, the ammonia condenser is connected to the liquid ammonia storage tank, the liquid ammonia storage tank is connected to the energy-saving device, the energy-saving device is connected to the ammonia cooler of the low-temperature methanol washing system, and the ammonia cooler of the low-temperature methanol washing system is connected to the compressor. The energy-saving device is connected to the tank truck via the liquid ammonia unloading universal arm.

2. The liquid ammonia filling and unloading device according to claim 1, characterized in that: The device includes two refrigeration systems, namely refrigeration system A and refrigeration system B. Refrigeration system A includes an ammonia condenser A, an economizer A, and a liquid ammonia storage tank A that maintains the high liquid level. Refrigeration system B includes an ammonia condenser B, an economizer B, and a liquid ammonia storage tank B that maintains the low liquid level. The compressor is connected to the ammonia condenser A and the ammonia condenser B. The ammonia condenser A and the ammonia condenser B are respectively connected to the liquid ammonia storage tank A and the liquid ammonia storage tank B. The liquid ammonia storage tank A and the liquid ammonia storage tank B are respectively connected to the economizer A and the economizer B. The economizer A and the economizer B are respectively connected to the ammonia cooler A and the ammonia cooler B of the low-temperature methanol washing system. The ammonia cooler A and the ammonia cooler B of the low-temperature methanol washing system are connected to the compressor. The economizer B is connected to the tank truck via a liquid ammonia unloading universal arm.

3. The liquid ammonia filling and unloading device according to claim 2, characterized in that: The power-saving device B is connected to a temporary pipeline via a drain valve. A liquid ammonia unloading universal arm is installed at the end of the temporary pipeline, and the liquid ammonia unloading universal arm is connected to the tank truck.

4. The liquid ammonia filling and unloading device according to claim 1, characterized in that: Both liquid ammonia storage tank A and liquid ammonia storage tank B are connected to replenishment liquid ammonia pipelines.

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