當返流與正流氣量之比要比正常值偏大時，例如環(huán)流量過大或中抽量過大，返流氣體可傳給正流空氣的冷量偏多，而正流空氣量相對返流氣量而言偏少，造成返流氣體冷量過剩。
When the ratio of the return flow to the positive flow is larger than the normal value, such as the annular flow is too large or the intermediate pumping volume is too large, the cooling capacity of the return flow gas to the positive flow air is too much, while the positive flow air is too small compared with the return flow gas, resulting in excess cooling capacity of the return flow gas.
對有器外活化條件的用戶，按下述步驟進行：1)首先將準備裝填的分子篩徹底活化、待填；
For users with external activation conditions, follow the following steps: 1) first, completely activate the molecular sieve to be filled and wait for filling;
2)拆開準備裝填分子篩的純化器頂部的空氣進口管和過濾管；
2) Disassemble the air inlet pipe and filter pipe at the top of the purifier to be filled with molecular sieve;
3)把經活化后的分子篩裝入器內，裝滿為止，并注意記下裝填分子篩的數(shù)量。為了裝填密實，可用木錘在筒體的封頭上敲擊；
3) Put the activated molecular sieve into the container until it is full, and note the quantity of filled molecular sieve. In order to fill compactly, a wooden hammer can be used to knock on the head of the cylinder;
4)分子篩裝完后，再裝回管路、過濾管和閥門。并應注意：連接法蘭的螺釘應均勻、對稱地擰緊；閥門需經脫脂后裝好填料；氮氣加溫閥的填料還應采用耐高溫的膨脹石墨或石棉線。
4) After the molecular sieve is installed, reinstall the pipeline, filter pipe and valve. It should also be noted that the screws connecting the flange should be tightened evenly and symmetrically; The valve shall be packed after degreasing; The packing of nitrogen heating valve shall also adopt high temperature resistant expanded graphite or asbestos thread.
提純設備低溫空氣分離法:先將空氣通過壓縮、膨脹降溫，直至空氣液化，再利用氧、氮的氣化溫度(沸點)不同(在大氣壓力下，氧的沸點為90K，氮的沸點為77K)，沸點低的氮相對于氧要容易氣化這個特性。
Low temperature air separation method of purification equipment: firstly, cool the air through compression and expansion until the air is liquefied, and then use the characteristic that the gasification temperature (boiling point) of oxygen and nitrogen is different (under atmospheric pressure, the boiling point of oxygen is 90K and that of nitrogen is 77K). Nitrogen with low boiling point is easy to gasify compared with oxygen.
提純設備對于中壓空分設備，出主熱交換器的低溫空氣是采用節(jié)流膨脹進入下塔的，以保證進塔空氣有一定的含濕。對低溫液體的膨脹來說，液體節(jié)流的能量損失小，膨脹機膨脹與節(jié)流膨脹的效果已無顯著差別，而節(jié)流閥的結構和操作比膨脹機要簡單得多，因此，下塔的液體膨脹到上塔時均采用節(jié)流膨脹。
Purification equipment for medium pressure air separation equipment, the low-temperature air from the main heat exchanger enters the lower tower through throttling expansion to ensure that the air entering the tower has a certain moisture content. For the expansion of low-temperature liquid, the energy loss of liquid throttling is small, and there is no significant difference between the expansion effect of expander and throttling expansion, while the structure and operation of throttle valve are much simpler than that of expander. Therefore, throttling expansion is adopted when the liquid from the lower tower expands to the upper tower.
提純設備在自清除性能上，翅片結構具有良好的自清除特性，比蓄冷器為佳；熱容量小，可縮短啟動時間；設備容積小，切換周期長，切換損失較??；阻力較小。
In terms of the self cleaning performance of the purification equipment, the fin structure has good self cleaning characteristics, which is better than the cold accumulator; Small heat capacity, which can shorten the start-up time; Small equipment volume, long switching cycle and small switching loss; Less resistance.
影響氧產量的因素，除了盡可能減少空氣損失，降低設備阻力，以增加空氣量；盡可能減少跑冷損失、熱交換不完全損失和漏損，以減少膨脹空氣量外，這里主要從調整精餾工況的角度，分析一下調整產量的方法。
The factors affecting oxygen production include reducing air loss and equipment resistance as much as possible to increase air volume; In addition to reducing the cold running loss, incomplete heat exchange loss and leakage as much as possible to reduce the amount of expanded air, this paper mainly analyzes the method of adjusting the output from the perspective of adjusting the distillation working condition.
沼氣提純設備如果氬餾分的含氮量太多，一則使粗氬純度降低，而且會導致粗氬冷凝器的溫差減小，甚至使溫差為零，此時粗氬塔便停止工作。并且，粗氬中含氮過多將給制取精氬帶來困難，所以氬餾分的抽口應該設在含氮盡量少的地方。
If the nitrogen content of argon fraction of biogas purification equipment is too much, the purity of crude argon will be reduced, and the temperature difference of crude argon condenser will be reduced or even zero. At this time, the crude argon tower will stop working. Moreover, too much nitrogen in crude argon will bring difficulties to the preparation of refined argon, so the extraction port of argon fraction should be set at the place with as little nitrogen as possible.
企業(yè)二維碼
2022-03-12
魯公網安備37011202000764號號