Product Description
The steel body desulfurization tower is designed, manufactured and accepted in strict accordance with the relevant provisions of JB288 "Technical Conditions for Steel Welded Atmospheric Pressure Vessels". The integral desulfurization tower is transformed and upgraded on the basis of the original composite desulfurization tower. The exterior of the main body of the equipment is welded by Q235 steel plate of 10-20mm according to different models, which is more beautiful and generous than the composite desulfurization tower, and it is not easy to leak during use; the main body lining can be made in various forms. One can be lined with granite slabs or ceramic plates, and the whole is formed with acid resistant mortar grouting to the outer shell; the other can be coated with a certain thickness of epoxy resin or glass flakes on the inner surface of the steel shell. Both forms can be delivered as a whole and installed on site; platforms, ladders, liquid supply pipelines and other supporting system systems are produced and installed on site.
The structure of the steel body desulfurization tower is smooth and flat, and has good sealing performance. It has the advantages of acid resistance, alkali resistance, corrosion resistance, wear resistance, and high temperature resistance. The service life can reach 20 years.
The flue gas is blown into the desulfurization tower by the induced draft fan, and a first-stage spray device is provided in the radial air inlet pipe of the desulfurization tower to pre-cool and pre-desulfurize the flue gas. The middle and lower parts rise evenly, and pass through the high-density spray washing reaction area and absorption reaction area formed by the three-stage spray device in sequence. The desulfurization liquid generates extremely fine mist droplets through the spiral nozzle, which provides a huge amount for the complete mixing of flue gas and desulfurization liquid. The contact area makes the gas-liquid two-phase physical and chemical reaction with sufficient mass and heat transfer, so as to achieve the efficient removal of SO2.
The desulfurization tower is equipped with a two-stage dewatering and demisting device. The flue gas after desulfurization continues to rise, and then passes through the two-layer folding plate demisting device in turn. Through the multiple impacts of mist and small droplets on the folding plate, large droplets are formed. The large droplets separate from the flue gas and fall, and the dehydrated flue gas is discharged through the flue to the chimney.
Desulfurization efficiency: ≥90% Resistance: <1200Pa
installation steps:
1. Carry out ground treatment at the designated location as the foundation, and the basic dimensions are subject to the basic layout drawing.
2. The desulfurization tower shall be made according to one section and 3 meters, and hoisted on site. According to the equipment 1, 2, 3, 4 and so on, they are installed in order from bottom to top. That is, number 1 is placed on the ground level, 2 is placed on 1, and 3 is placed on 2 in order. Installation requirements: Simplified Yuanjin is aligned inside and outside. The first section should be horizontal and vertical on the ground, and the sections should be full, tight, and airtight. Ensure verticality between sections.
3. Install 2-3 layers of atomization devices, demisters and flushing devices in the desulfurization tower. Circulation spray tower, flushing water pipe, water pump, etc. can refer to the layout drawing and be determined according to the terrain on site.
4. After the main body of the desulfurization tower is installed, it should enter the cylinder to smooth the joints.
5. The circulating sedimentation tank can refer to the basic layout drawing according to the site topography, but there must be a reaction tank, sedimentation tank and clear water tank.
Description:
1. The diameter and height of the desulfurization tower can be adjusted according to the customer's actual flue gas volume, desulfurization efficiency and site.
2. The flue gas inlet temperature is not higher than 200 ° C. If the temperature is greater than 200 ° C, a pre-cooling tower should be added.
3. Imported dust concentration <200mg / Nm3.
Working principle of magnesium oxide desulfurization liquid
The desulfurization mechanism of magnesium oxide is similar to the desulfurization mechanism of calcium oxide. Both alkaline oxides react with water to form hydroxides, and then undergo acid-base neutralization with sulfurous acid solution generated by dissolving sulfur dioxide in water. Magnesium sulfite and magnesium sulfate are reused after the recovery of SO2 or they are completely converted into sulfates by forced oxidation to make magnesium sulfate heptahydrate.
The main chemical reactions that occur during the desulfurization process are:
MgO ＋ H2O = Mg (OH) 2
Mg (OH) 2 ＋ SO2 = MgSO3 ＋ H2O
MgSO3 ＋ H2O + SO2 = Mg (HSO3) 2
MgSO3 ＋ 1 / 2O2 = MgSO4
The main reactions occurring in the regeneration phase of magnesium oxide are:
MgSO3 → MgO ＋ SO2
MgSO4 → MgO ＋ SO3
Mg (HSO3) 2 → MgO ＋ H2O ＋ 2SO2
SO2 ＋ 1 / 2O2 → SO3
SO3 ＋ H2O → H2SO4
When forced oxidation of by-products to produce MgSO4? 7H2O
MgSO3 ＋ 1 / 2O2 → MgSO4
MgSO4 ＋ 7H2O → MgSO4? 7H2O
