一种液氨储罐液氨泵冷泵回收装置
By designing a liquid ammonia pump cooling pump recovery device for liquid ammonia storage tanks, the problem of incomplete venting of the liquid ammonia pump cooling pump in atmospheric pressure liquid ammonia storage tanks was solved, achieving equipment protection and environmentally friendly liquid ammonia recovery, and improving production efficiency and economic benefits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJI COAL CHEM IND GROUP
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-17
AI Technical Summary
In the process of synthetic ammonia production, incomplete venting of the cold pump of the liquid ammonia pump in the atmospheric pressure liquid ammonia storage tank can cause the pump to fail to pump liquid after startup, resulting in equipment damage such as mechanical seal wear and leakage, shaft breakage, etc. At the same time, the discharged gaseous ammonia and liquid ammonia pollute the environment and cause waste of the liquid ammonia product.
Design a liquid ammonia storage tank and liquid ammonia pump cold pump recovery device, including a separation tank, an ammonia pump and cold pump, and an exhaust drain. The separation tank is installed below the ammonia pump and cold pump. It is pressurized and discharged through a nitrogen pipeline and connected to the inlet pipeline of the ammonia compressor and ice machine. A pressure gauge and a level gauge are installed. The ice machine uses negative pressure to draw in gaseous ammonia and liquid ammonia. The top of the separation tank is connected to the ammonia flare network for displacement and depressurization.
It achieves thorough venting of the cold pump, avoiding equipment damage and environmental pollution, improving the liquid ammonia recovery rate, reducing product waste, and enhancing operational efficiency and environmental quality.
Smart Images
Figure CN224507065U_ABST
Abstract
Claims
1. A liquid ammonia tank pump-around recovery apparatus comprising a knockout drum, an ammonia pump-around, and a vent line, wherein the apparatus is characterized by: The separator is provided with a recess so that its installation position is lower than that of the ammonia pump, the cold pump, and the exhaust drain. The gas phase of the separator is connected to the inlet pipeline of the ammonia compressor and the refrigeration machine. The ammonia pump and the cold pump are connected to the separator via a nitrogen pipeline for pressurization and liquid discharge. The top of the separator is connected to the ammonia flare network for replacement and depressurization.
2. The liquid ammonia pump recovery apparatus of claim 1, wherein, The separation tank is equipped with a pressure gauge.
3. The liquid ammonia storage tank liquid ammonia pump cold pump recovery device according to claim 1, characterized in that, The separation tank is equipped with a level gauge and a shut-off valve, and the shut-off valve is located on the gas phase pipeline connected to the ice machine.
4. The liquid ammonia pump recovery apparatus of claim 1, wherein, The nitrogen inlet pipe of the gas phase of the separator is equipped with a front shut-off valve, a one-way valve and a rear shut-off valve along the nitrogen flow direction. The one-way valve and the rear shut-off valve are connected to the exhaust drain via an intervalve drain valve.
5. The liquid ammonia pump recovery apparatus of claim 1, wherein, The ammonia removal flare pipeline at the top of the separator is connected to the pressure relief ammonia removal flare via an ammonia flare valve, and is also connected to the ice machine via a pipeline equipped with a high-level interlock shut-off valve and a gas-phase connection ice machine valve.
6. The liquid ammonia pump recovery apparatus of claim 1, wherein, The bottom of the separator is connected to the ammonia storage tank via a pipeline equipped with a drain valve.