Novel method for unloading and delivering liquid ammonia

A new method, liquid ammonia technology, applied in container filling method, gas/liquid distribution and storage, equipment loaded into pressure vessels, etc., can solve the problem of large nitrogen consumption, achieve the effect of complete unloading and avoid potential safety hazards.

Active Publication Date: 2012-12-19
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This delivery method is limited by the pressure of medium and high pressure nitrogen, and requires a large amount of nitrogen consumption

Method used

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  • Novel method for unloading and delivering liquid ammonia

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited.

[0019] Liquid ammonia unloading condition: first connect the tank car connection joint 1 on the unloading pump inlet pipeline 8 and the unloading gas-phase communication pipeline 10 to the liquid ammonia tank car, open the front unloading pump inlet valve 2, the rear unloading pump inlet valve 3, unloading control Valve 11, storage tank liquid phase outlet cut-off valve 7, front gas phase communication valve 13 and unloading gas phase communication valve 5, and other valves remain closed. The liquid ammonia is transported from the tank truck to the liquid ammonia storage tank 6 through the liquid ammonia delivery pump 4 . Since the gas phase space of the liquid ammonia storage tank is connected with the gas phase space of the tank truck, the liquid ammonia delivery pump only needs to overcome the potential difference and pipeline resis...

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Abstract

The invention provides a novel method for unloading and delivering liquid ammonia. The method is implemented by only one liquid ammonia delivery pump, the liquid ammonia can be unloaded and delivered by switching relevant valves, and the liquid ammonia delivery pump is one of a barrel pump, a screw pump and a reciprocating pump. Compared with an existing method for unloading and delivering liquid ammonia, the novel method for unloading and delivering the liquid ammonia has the advantages that a liquid ammonia unloading pump can be omitted, residual ammonia in a tank car after unloading can be further absorbed, the liquid ammonia is unloaded thoroughly, environmental pollution is prevented assuredly, and potential safety hazards are avoided.

Description

technical field [0001] The invention relates to a method for unloading and conveying liquefied gas, in particular to a method for unloading and conveying liquefied ammonia. Background technique [0002] Liquid ammonia is an important chemical raw material and can be used as a refrigerant in freezing stations. The unloading and transportation of liquid ammonia is usually through compressors, pumps or other power, unloading the liquid ammonia in the tanker into the liquid ammonia storage tank; and then transporting the liquid ammonia to the user through the power equipment. [0003] At present, the methods for unloading liquefied ammonia in the factory have the following methods: the first method is to utilize the height difference to make the liquefied ammonia in the tanker flow into the storage tank by itself. The key to this method is to raise the tank car or lower the storage tank. When unloading the truck, connect the gas phase pipes between the two to balance the press...

Claims

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Application Information

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IPC IPC(8): F17D1/14F17C5/02
Inventor 穆钰君户秋义郭红红段强
Owner CHINA TIANCHEN ENG
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