Wet flue gas desulphurization special compound synergist SGR-1201 SGR-1201 Wet FGD enhancement additive 1. Product Introduction "wet flue gas desulphurization special compound synergist" can also be called "wet desulphurization synergist compound" is designed for power plants, steel mills, cement plants and other uses of limestone - gypsum wet sulfur dioxide removal process and developed a product. .. 2 Technical Index Appearance white or gray-brown powder PH (1%) 2.88 3 product action principle and effect 3.1 desulfurization process involves mainly limestone - gypsum wet flue gas desulfurization system involves the following three processes: Limestone dissolution, absorption of sulfur dioxide, oxidation of sulfite to sulfate. Involved in major chemical reaction is as follows: 3.2 to add the product on wet desulfurization (wet FGD) intensify the effect produced by the effect of Figure 3.3 (a) composite desulphurization synergist by changing the nature of the gas-liquid contact interface, reducing the mass transfer resistance; ( 2) passing the hydrogen ions promote limestone dissolution buffer pH fluctuations and maintain system stability, improve the efficiency of desulfurization; (3) inhibiting the absorption site sulfite oxidation, to prevent the blend mixing sulfite and calcium sulfate scale formation; (4) by Calcium sulfate crystals rhetorical surface, improving gypsum dewatering rate. Therefore, after using the desulphurization synergist, work can be done two ways: First, stop the pump under the premise of improving the stability of system operation (PH is relatively stable, the desulfurization efficiency is relatively stable), expanding coal space, improve desulfurization rate; Second, in addition to the above aspects, to ensure the stable operation of the desulfurization efficiency and system premise, if you disable a single slurry circulating pump, the daily electricity savings are considerable, but also can reduce the amount of limestone, so saving energy . 4 Use once or in batches adding 4.1 to pit at the absorber, can put forward specific proposals in accordance with the actual situation of the power plant; 4.2 dosage may be based on the actual functioning of the FGD system desulfurization synergist specifically recommend the best Canadian union dosing, the general dosage between 200ppm-1500ppm; 4.3 synergist wet desulfurization desulfurization tower circulating composite slurry PH value of 5.5 to 5.8 in the desulfurization control better the maximum value PH is preferably no more than 6.0. 5 Packaging and storage of the product is sealed in plastic bags packaging, net weight 25Kg, can be determined according to user needs. At room temperature, stored in a cool, dark, dry place, away from fire, heat, should oxidants, reducing agents, alkaline substances stored separately. To complete transportation package, loaded to secure, on the way to prevent rain, sun, heat. Storage period of twelve months. 6 Safety and Protection This product is a powder Gigalight attention to labor protection, the need to wear a protective mask when artificially added to prevent dust entering the respiratory tract to cause injury; contact with skin and eyes rinse with plenty of water. 7 7.1 Wet Compound of product performance limestone desulfurization activity of the synergist in Table 7.1 Wet desulfurization synergist compound limestone Limestone Dissolution Rate of dissolution time (min) no synergist additives increase dissolution rate of 30% 13.5 12.5 7.4% 50% 31.0 23.0 25.8% 60% 28.5% 80% 48.0 34.3 / 68.2 - Referring to the power industry standard DL / T 943-2005 "wet flue gas desulphurization with limestone powder reaction rate determination", using 250 mesh limestone powder, wet desulfurization measured influence of adjuvant (Table 3) the rate of limestone dissolution. As can be seen from Table 7.1, adding the wet composite desulfurization system synergist, limestone dissolves significantly faster, ie wet desulphurization synergist compound has the effect of promoting the dissolution of limestone. According to Limestone - gypsum wet flue gas desulfurization principle, we can see if the system of limestone dissolution speed, the system can provide more calcium short time, you can speed up the absorption of sulfur dioxide, improve system desulfurization rate. 7.2 wet desulphurization synergist cushioning properties of composite Figure 7.2 wet desulphurization synergist cushioning compound (a-wet composite desulphurization synergist; b-alien-like desulphurization synergist) desulfurization tower pH and dissolved limestone slurry system for conversion of sulfur dioxide calcium sulfate crystals further contradiction between the low pH is conducive to the limestone dissolution, but is not conducive to sulfur dioxide absorption; high pH is conducive to the absorption of sulfur dioxide, but is not conducive to the limestone dissolution. A lot more practice, pH maintained at 5.5-5.8, most conducive to the removal of sulfur dioxide. The implication, if the pH is about 5.5 times longer, the higher the sulfur dioxide removal efficiency of the system. May be added gradually to the system through the inner acid (dilute hydrochloric acid or dilute sulfuric acid volume) to quantitatively evaluate, in a certain pH range, the more the volume of acid is added, the better the buffering system. Figure 7.2 shows, wet composite desulfurization desulfurization synergist synergist with a buffer of a performance comparison chart. Difficult to see from the figure, the wet desulfurization desulfurization synergist buffered composite curve is relatively flat, so pH5.5 larger space (an increase of about 59%), so wet desulphurization synergist with excellent cushioning properties. 7.3 Wet composite desulfurization gypsum slurry settling synergist affecting the performance of the composite figure 7.3a different wet desulfurization gypsum slurry settling synergist concentration on properties of the composite figure 7.3b affect wet desulfurization gypsum slurry synergist concentration on settling performance schematic forced oxidation limestone - gypsum wet flue gas desulfurization system, only the bottoms of calcium sulfite crystalline regions more than 95% conversion of calcium sulfate, calcium sulfate is possible to avoid the formation of calcium sulfite scale mixed body, even so forced oxidation tube, slurry circulating pump, etc. is difficult to avoid the formation of calcium sulfate Gouwu. Figure 7.3 shows the system with and without added synergist added wet desulfurization gypsum composite settlement situation, visible desulfurization gypsum dispersion synergist can improve system performance, and the higher the concentration dispersion synergist more obvious, 600ppm-1000ppm increase is not obvious. Slurry dispersion better, the wall is not easy to jam, slurry circulation pump fouling wear, forced oxidation pipe plug fouling, dirt and other hazards incident tower wall less likely to occur, the system is stable natural extension of the operation cycle. And in doing sedimentation experiments, the additive is less than clear that the bottom of the bottle gag 600ppm with a small amount of hard Gouwu difficult to remove, it is recommended to use this desulphurization synergist concentration can not be too low.