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Design calculation of wet scrubber

Views: 68     Author: China Xicheng     Publish Time: 2021-07-24      Origin: China Xicheng

After receiving the quotation for the wet scrubber, the customer often puts forward the quotation is too high, so many customers do not know the scrubber, but habitually give the conclusion that the price is too high, it seems that something is wrong, the technical team will pass the data Provide detailed basis and configuration of wet scrubber quotation.


Affect the wet scrubber quotation-product material

The scrubber quotation is based on the material and specifications. The wet scrubber materials mainly include PP polypropylene plastic, SS304 stainless steel, FRP glass fiber reinforced plastic, carbon steel lined rubber, etc., under normal temperature and pressure, the PP material scrubber is used The most extensive, relatively low price cost, easy to process.

Spray scrubber

Affect quotation-specifications

Secondly, another factor that affects the price is the size specifications. The larger the size (diameter and height), the more materials and labor costs, and the higher the quotation. In fact, the larger the size and specifications, the greater the amount of waste gas to be treated. Large, proportional to the quoted price.

Technical Parameter Table :

Air volume
(M3/H)
Size
(mm)
THK
(mm)
Drain outlet
(mm)
Water tank
size(mm)
Inlet and 
outlet size
(mm)
Pump
(KW)
Wind
resistance
 (Pa)
3000 800    8    DN32 600*700*H700      315 0.75 500
5000 1000    8    DN40 600*800*H700      400  1.5  500
8000 1200    8    DN40 600*1000*H700      500  2.2 500
10000 1500   10    DN40 700*1000*H700       550  2.2 500
12000 1600   10    DN50 700*1000*H700      600 3.75 500
15000 1800   10    DN50 700*1200*H700      650 3.75 500
20000 2000   10    DN50 700*1200*H700      750  5.5 500
25000 2200   10    DN50 700*1200*H700      950  5.5 600
30000 2500   12    DN65 700*1200*H700     1000  5.5 600
35000 2700   12    DN65 1000*700*H700     1100 7.5 600
40000 2900   12    DN65 1000*700*H700     1200 7.5 600
45000 3000   12    DN65 1000*700*H700     1250  7.5 600


Affect the quotation-structure configuration

Finally, the key that affects the quotation depends on the configuration. The higher the configuration, the higher the price of the scrubber. Usually the scrubber includes tower body, packing, packing layers, integrated water tank, circulating pump, circulating water pipe, overflow pipe, drain pipe, water inlet ball valve, transparent liquid level pipe, the above is the configuration of conventional wet scrubber system.


The scrubber quotation is based on the tower diameter and height. The diameter and height are calculated based on the total air volume and treatment concentration of the exhaust gas. From a design perspective, the quotation should be based on the exhaust gas volume. Users can ask about 10,000 cubic meters per hour. What is the size of the wet scrubber and how much is the price? What parts are included.


Calculation method of wet scrubber quotation

Example: Select the wet scrubber model and give an accurate quotation. If the customer’s workshop has a designed exhaust volume of 10,000 cubic meters per hour, and the designed flow rate through the empty tower is 2 meters per second, the diameter of the scrubber will be 1.33 after calculation. Meters, the diameter is 1.4 meters through regularization. Single-layer spray design, the exhaust gas inlet diameter is 500mm, and the total height of the tower can be designed to be 4600mm.

exhaust gas cleaning system

With detailed air volume and scrubber diameter data quotations, it can be accurately calculated. The calculation method is to disassemble the plates. The thickness of the scrubber bottom plate is 12mm, the thickness of the tower body is 8mm, and the wall thickness of the water tank is 10mm. Filler chooses ø76 rosette, except The fog layer chooses ø50 multi-faceted hollow sphere. The material costs incurred above, plus production costs and company profits are the quotations. Take the 10,000 air volume tower diameter of 1.4 meters to calculate, with vertical anticorrosive circulating pumps and inlet and outlet pipes. The quotation is about 25,000 yuan.


Wet scrubber extension reading

The size of the scrubber is directly proportional to the capacity of the air volume. The larger the scrubber, the more air volume it can handle, and vice versa. For example, a circular spray tower of φ1.5-H4.2 (m) can handle air volume between 8000-10000, and is usually suitable for a space between 30㎡-33㎡ (the net height of the space is 3m, and the workshop needs to handle the air volume) ). Air volume calculation formula: equipment air volume = room volume (length × width × height) × ventilation constant (60-100 times), the constant here can be determined according to the working time.

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