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秦皇岛冷库扩建了一座2500~T高温库,该库方单层建筑,库房冷风机采用上进下出供液方式。机房设计中考虑到库房回气管高于循环桶进气口,因而将机房设备间地坪标高降低。采用上部带有气液分离器的卧式循环桶,以确保氨泵静液柱高度。但在投产后.严重的产生倒霜现象,即使在满负荷的情况下,开一台4AV—12.5型压缩机也极易倒霜。研究其主要原因是循环桶结构不合理所造成。按图1所示:库房抽回的气液不能很好的分离,由于气液分离器与卧式循环桶连接的管径仅为D108,库房未蒸发的液体无法回到卧式循环桶内,因而造成压缩机严重倒霜。改进后如图2所示:①将库房回气管D133直接下
Qinhuangdao Cold Storage expansion of a 2500 ~ T high-temperature storage, the library square single-storey building, warehouse cooling fan using the way up and down for the solution. Engine room design taking into account the return of the Treasury barrel is higher than the inlet of the circulation barrel, thus reducing the floor elevation of equipment room room. Use the upper horizontal cylinder with a gas-liquid separator to ensure the height of the hydrostatic column of the ammonia pump. However, after commissioning, the serious phenomenon of pouring down, even at full capacity, open a 4AV-12.5-type compressor is also very easy to pour frost. The main reason for the study is the unreasonable structure of the circular barrel. As shown in Fig. 1, the gas-liquid drawn back from the warehouse can not be well separated. Since the diameter of the gas-liquid separator connected with the horizontal circulation barrel is only D108, the liquid that is not evaporated in the warehouse can not be returned to the horizontal circulation barrel, As a result, the compressor is severely defrost. Improved as shown in Figure 2: ① the Treasury back to the trachea D133 directly