你***不知道廢氣凈化塔如何選擇~~~

You never know how to choose the waste gas purification tower~~~

廢氣凈化塔選擇一般原則  合理選擇尾氣吸收塔塔型是做***塔設(shè)備設(shè)計(jì)的***要環(huán)節(jié)。選擇時(shí)應(yīng)考慮的主要因素有：物料性質(zhì)、操作條件、塔設(shè)備的性能，以及塔設(shè)備的制造、安裝、操作和維修等。

The selection of the general principles for the selection of the waste gas purification tower and the reasonable selection of the type of the tail gas absorption tower are the primary links for the design of the tower equipment. The main factors to be considered in the selection are: material properties, operating conditions, performance of tower equipment, and manufacturing, installation, operation and maintenance of tower equipment.

廢氣凈化塔

Waste gas purification tower

（1）與物性有關(guān)的因素   a、易起泡的物系，如處理量不***時(shí)，以選用填料塔為宜。因?yàn)樘盍夏苁古菽屏眩迨剿t易引起液泛。   b、具有腐蝕性的介質(zhì)，可選用填料塔。如必須用板式塔，宜選用結(jié)構(gòu)簡(jiǎn)單、造價(jià)便宜的篩板塔盤、穿流式塔盤或舌形塔盤，以便于更換。   c、具有熱敏性的物料減壓操作，以防過熱引起分解或聚合，故應(yīng)選用壓力降較小的塔型，如采用裝填規(guī)整填料的塔、濕壁塔等。當(dāng)要求真空度較低時(shí)，宜用篩板塔或浮閥塔。  d、粘性較***的物系，可以選用***尺寸填料的填料塔，板式塔的傳質(zhì)效率則太差。   e、含有懸浮物的物料，應(yīng)選擇液流通道較***的塔型，以板式塔為宜?？蛇x用泡罩塔、浮閥塔、柵板塔、舌形塔或孔徑較***的篩板塔等，不宜使用小填料。   f、操作過程中有熱效應(yīng)的系統(tǒng)，用板式塔為宜。板式塔的塔盤上積有液層，可在其中安裝換熱管，進(jìn)行有效的回執(zhí)或冷卻。

(1) factors related to physical properties A. if the treatment capacity of foaming system is not large, it is better to select packing tower. Because fillers can cause bubbles to burst, plate pagodas are prone to flooding. B. for corrosive media, packed tower can be selected. If plate tower must be used, sieve plate tray, through flow tray or tongue tray with simple structure and low cost should be selected for easy replacement. C. pressure reducing operation of materials with thermal sensitivity to prevent decomposition or polymerization caused by overheating, so tower type with smaller pressure drop shall be selected, such as tower with structured packing, wet wall tower, etc. When low vacuum is required, sieve plate tower or float valve tower should be used. D. for the system with large viscosity, the packed tower with large size packing can be selected, while the mass transfer efficiency of the plate tower is too poor. E. for materials containing suspended solids, the tower type with large liquid flow channel shall be selected, and the plate tower is preferred. Bubble cap tower, float valve tower, grid plate tower, tongue shaped tower or sieve plate tower with large aperture can be selected, and small packing is not suitable. F. for the system with thermal effect during operation, plate tower is suitable. There is liquid layer on the tray of plate tower, in which heat exchange tube can be installed for effective receipt or cooling.

凈化塔

Purification tower

（2）與操作條件有關(guān)的因素   a、若氣相傳質(zhì)阻力***，宜采用填料塔，填料層中氣相呈湍流，液相為膜狀流。反之，受液要控制的系統(tǒng)，宜采用板式塔，因?yàn)榘迨剿幸合喑释牧?，用氣體在液層中鼓泡。   b、***的液體負(fù)荷，可選用填料塔，若用板式塔時(shí)宜選用氣液并流的塔型，如噴射型塔盤或用板上液流阻力較小的塔型，如篩板和浮閥。此外，導(dǎo)向篩板塔盤和多降液管篩板塔盤都能承受較***的液體負(fù)荷。   c、低的液體負(fù)荷，一般不宜采用填料塔。   d、液氣比波動(dòng)的適應(yīng)性，板式塔***于填料塔故當(dāng)液氣比波動(dòng)較***時(shí)宜用板式塔。   e、操作彈性，板式塔較填料塔***，其中以浮閥塔為***，泡罩塔次之，一般地說(shuō)，穿流式塔的操作彈性較小。

(2) factors related to the operating conditions A. if the mass transfer resistance of the gas phase is large, the packing tower should be used. The gas phase in the packing layer is turbulent and the liquid phase is membrane flow. On the contrary, for the system to be controlled by the liquid, the plate tower should be used, because the liquid phase in the plate tower is turbulent and the gas bubbles in the liquid layer. B. for large liquid load, the packed tower can be selected. If the plate tower is used, the tower type of gas-liquid parallel flow should be selected, such as jet type tray or the tower type with less liquid flow resistance on the plate, such as sieve plate and float valve. In addition, both guide sieve tray and multi downcomer sieve tray can bear large liquid load. C. packing tower is generally not suitable for low liquid load. D. the adaptability of the fluctuation of liquid gas ratio, plate tower is better than packing tower, so plate tower should be used when the fluctuation of liquid gas ratio is large. E. the operating flexibility of plate tower is larger than that of packed tower, in which the floating valve tower is the largest and the bubble cap tower is the second. Generally speaking, the operating flexibility of through flow tower is smaller.

凈化塔

Purification tower

（3）其它因素   a、對(duì)多數(shù)尾氣吸收塔情況，塔徑***于800mm時(shí)，宜用板式塔，小于800mm，則可用填料塔。但也有例外，鮑爾環(huán)及某些新型填料在***塔中的使用效果***于板式塔。同時(shí)，塔徑小于800mm時(shí)，也有使用板式塔的。   b、一般來(lái)說(shuō)填料塔比板式塔重。   c、***塔以板式塔造價(jià)較廉。因填料價(jià)格約與塔體的容積成正比，板式塔按單位面積計(jì)算的價(jià)格，隨塔徑增***而減小。

(3) other factors A. for most tail gas absorption towers, if the diameter of the tower is greater than 800mm, plate tower should be used. If the diameter is less than 800mm, packed tower can be used. But there are some exceptions. The application effect of Bauer ring and some new packing in large tower is better than that of plate tower. At the same time, when the tower diameter is less than 800mm, plate tower is also used. B. generally speaking, packed tower is heavier than plate tower. C. the cost of plate tower is relatively low. Because the price of packing is proportional to the volume of the tower, the price of plate tower calculated by unit area decreases with the increase of tower diameter.