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The pH of the slurry in the absorption tower may not be too high or too low. If it is too high, it will react with sulfur dioxide. If it is too low, it may react with calcium ions to form salts. Generally, the pH value should be controlled at 6. At this time, SO2 can be effectively absorbed. However, its deficiency is due to fouling and fouling, which affects the operation efficiency of the desulfurization system and is not conducive to the efficient development of desulfurization. If the pH is controlled at 4 If it is too low, it may affect the absorption of SO2 and cause equipment corrosion. The scientific pH range should be 5-6.
2 Adjust the reaction time of desulfurizer and flue gas
During the actual flow of flue gas, there will be some contact with the limestone slurry, and the reaction will occur during the contact process. The degree of reaction depends on the contact time. Selecting a circulation pump with a relatively high lift can mobilize the long-term contact between the two to promote the reaction. Increase desulfurization efficiency.
3 Grasp the liquid-gas ratio
The larger ratio between liquid and gas means that the two can be effectively eliminated, thereby speeding up desulfurization. However, it should be pointed out that a gas-liquid equilibrium will be formed between SO2 and the absorption liquid. If the proportion of liquid and gas exceeds the specified range, the desulfurization work will become slow, and the SO2 related gas will not be able to completely and fully react with limestone. At this time, only the circulation reaction can be carried out. At this time, we can think of ways to increase the number of slurry circulation so as to ensure full contact and complete reaction between calcium carbonate and sulfur dioxide, and finally ensure the removal rate of sulfur dioxide.
4 Limestone Particle Size and Purity
In order to ensure that the reaction is carried out efficiently and thoroughly, the size of the limestone should be controlled so that it can reach a finer state and increase its absorption rate. The fineness is: more than 90% of the limestone can pass through the 325-mesh sieve, and the purity must reach over 90%. .
5 Oxidized air volume
In desulfurization, oxygen will be incorporated, which will cause sulfite ions to become sulfate ions. If oxygen continues to rise, CaSO4?2H2O will be formed more quickly, thereby accelerating the desulfurization rate. Therefore, an additional oxidation fan may be attempted.
6 Control smoke concentration
Smoke will inevitably incorporate a certain amount of soot, which will affect the efficient desulfurization, so that the calcium ions in limestone can not be dissolved efficiently, the soot contains heavy metals, and it may also hinder the reaction between calcium ions and hydrogen nitrite ions, if Too much soot content will affect the slurry reaction efficiency, affecting the desulfurization efficiency, so to control the desulfurization equipment inlet dust, the amount should be below 200mg/m3.
7 grasp the temperature of the flue gas
Generally speaking, before the flue gas formally enters the absorption tower, the temperature must be controlled so that the sulfur dioxide gas can be effectively contacted with the slurry and the desulfurization efficiency can be accelerated. Usually, the temperature of the flue gas should be controlled at about 60°C, and then the absorption operation should be started based on this temperature. The temperature of the flue gas at the inlet of the tower should also be at 80°C.
This Machine can produce C or Z shaped steel channels.Now C/Z section are widely used for steel constructure,workshop,warehouse,commerial building.
Our factory is specialized in different kinds of Roll Forming Machine ,also we can design the machine according to you products details.
The detail of Purlin Roll Forming Machine pls see belows:
Rolling Speed 8-12m/min(not include cutting time)
Rolling Thickness 0.3mm-0.8mm
Shaft Diameter 75mm
Roller Stations About 18 stations
Roller Material 45# forged steel(coated with chrome)
Effective Width 820mm
Feeding Coil Width 1000mm
Raw Material Color painted coils
Cutting(Blade) Material Cr12
Motor Power 4KW
Hydraulic Station 4KW
Dimension 7500X1300X1400(mm)
Total Weight 5.6T
Equipment List
1 Decoiler
2 Feeding Device
3 Main Forming Machine
4 Hydraulic Step Press Device
5 Hydraulic Cutting Device
6 Hydraulic Station
7 PLC Computer Control System
8 Output Table
Purlin Roll Forming Machine
Purlin Roll Forming Machine,Purlin Roof Roll Forming Machine,C/Z Purlin Roll Forming Machine,Full Automatic Purlin Roll Forming Machine
HEBEI HANMAC MACHINE CO., LTD. , https://www.chinahanmac.com