First, the stainless steel reaction tank failure phenomenon: shell damage (corrosion, cracks, perforation) Failure causes: 1, by the media radiation (pitting, intergranular corrosion); 2, thermal stress affects the cracks or alkali embrittlement; 3, wear thinning or uniform corrosion.　　Treatment: 1, the use of corrosion-resistant materials lining the shell needs to be relined or local patch welding; 2, welding to eliminate stress, cracks to be repaired; 3, more than the design of the minimum allowable thickness, the need to replace the body.　　

Second, the stainless steel reaction tank failure phenomenon: over-temperature and over-pressure Trouble causes: 1, instrumentation failure, control is not strict; 2, misoperation; raw materials are not properly proportioned; resulting in a violent reaction; 3, due to poor heat transfer or stirring performance, resulting in a side reaction; 4, the inlet valve malfunction of the inlet pressure is too large, high pressure.　　Treatment: 1, check, repair the automatic control system, strict implementation of the operating procedures; 2, according to the operating law, to take emergency pressure, according to the specified quantitative timing feeding, to prevent misuse; 3, increase the heat transfer area or remove the scaling, improve the heat transfer effect of the repair of the stirrer, improve the mixing efficiency; 4, shut down the total steam valve, cut off the steam to repair the valve.　　

Third, the stainless steel reaction tank failure phenomenon: seal leakage Trouble causes: packing seal 1, stirring shaft at the packing wear or corrosion, resulting in too large a gap; 2, improper location of the oil ring or oil blockage can not form an oil seal; 3, the gland is not pressed, filler quality is poor, or used for a long time; 4, packing box corrosion.　　To pay attention to the mechanical seal 1, dynamic and static ring end face deformation, bruises; 2, end face pressure is too large, the friction side of the thermal deformation; 3, the sealing ring is not the right choice of material, not enough compression force, or the V-shaped sealing ring installed in reverse, the loss of sealing; 4, the axis of the static ring and the perpendicularity of the ring end face error is too large; 5, the operation of the pressure, temperature instability, hard particles into the friction side; 6, the amount of axial string more than the target; 7, mounted or glued to the movable and static ring set of the joints Leakage.　　Treatment: packing seal 1, replace or repair the mixing shaft, and processed on the machine tool to ensure the roughness; 2, adjust the position of the oil ring, clean the oil circuit; 3, compression packing, or replacement of packing; 4, repair or replacement; Mechanical Seal 1, replacement of friction or regrinding; 2, adjust the ratio of the pressure should be appropriate to strengthen the cooling system, and timely take away the heat; 3, sealing ring selection, installation, be reasonable, and to have sufficient Compression force; 4, shut down, re-alignment, to ensure that the degree of non-perpendicularity is less than 0.5mm; 5, strict control of process indicators, particles and crystals can not enter the friction vice; 6, adjustment, overhaul so that the amount of shaft tampering to meet the standard; 7, improve the installation process, or the amount of excess surplus should be appropriate, or adhesive should be good, firm.　　

Fourth, stainless steel reaction tank failure phenomenon: kettle has an abnormal murmur Trouble causes: 1, stirrer friction kettle accessories (snake tube, thermometer tube, etc.) or scrape the wall; 2, the stirrer is loose; 3, the lining bulging, and stirrer impact; 4, stirrer bending or bearing damage.　　Treatment: 1, downtime maintenance to find the right, so that the agitator and accessories have a certain distance; 2, downtime inspection, tighten the bolts; 3, repair the bulge, or replacement of the lining; 4, overhaul or replacement of shafts and bearings.　　

Fifth, stainless steel reaction tank failure phenomenon: enamel agitator off Trouble causes: 1, corroded by the medium fracture; 2, the motor rotates in the opposite direction.　　Treatment: 1, replace the enamel shaft or repair with fiberglass; 2, shut down to change the direction.　　

Six, stainless steel reaction tank failure phenomenon: enamel kettle flange leakage Trouble causes: 1, flange porcelain surface damage; 2, choose the gasket material is unreasonable, the installation of the joint is not correct, empty, wrong shift; 3, loose or insufficient number of cards.　　Treatment: 1, repair, anti-corrosion paint or resin; 2, according to the process requirements, select the gasket material, gasket interface to lap, position should be uniform; 3, according to the design requirements, there is a sufficient number of cards, and should be tightened.　　

Seven, stainless steel reaction tank failure phenomenon: porcelain surface scale burst and microporous Trouble causes: 1, jacket or stirring shaft tube into the acidic impurities, resulting in hydrogen embrittlement phenomenon; 2, the porcelain layer is not dense, there are microporous hidden trouble. Treatment: 1, neutralized with sodium carbonate, flushed with water or repair, serious corrosion needs to be replaced; 2, a small number of microporous can be repaired, serious update.　　Eight, stainless steel reaction tank failure phenomenon: motor current exceeds the rated value Trouble causes: 1, bearing damage; 2, low temperature in the kettle, viscous material; 3, the spindle speed is faster; 4, the stirrer diameter is too large.　　Treatment: 1, replace the bearings; 2, adjust the temperature according to operating procedures, the viscosity of the material can not be too large; 3, control spindle