supermarket steam atmospheric pressure fire tube boiler

Second, understand the problem in the steam supermarket steam atmospheric pressure fire tube boiler with a reasonable, now select the boiler or pay attention to cost-effective, low cost is often directly affect the purchase and use of present boilers, this means, for now focus on market-related steam boilers not an easy thing, understand the relevant price, determine the relevant form, and add to the analysis of the design, it can be said that, directly or indirectly, on the way to buy now understand that the quality of the boiler and general image, in accordance with Shop now for the boiler is to say get the latest performance.

Industrial supermarket steam atmospheric pressure fire tube boiler scale remaining after pickling cleaning operation of boiler scale, and in particular the sulfate scale silicate scale even pickling method, it is difficult disposable washed. Residual scale much rougher than the surface of scale-free surface, a rough surface has a plurality of cavities, and the cavity was a stagnation region, where the scale easily concentrated, deposited, raw knot. Based on the above-mentioned negative factors, the boiler pickling, the handling of the residual scale is necessary. 2 2.1 descaling methods and principles sodium humate salt and so synergy, the purpose of removal of old scale during operation. 2.2 Principle dirt into CaC3 water residue. I play a dissolution of silicate. NaOH silicate scale is difficult to dissolve and react to produce soluble sodium silicate. The higher the temperature of the boiler water containing alkali solution, the above reaction is carried out more easily. An organic phosphonate of chelation and lattice distortion effect. Organic phosphonates and not only in aqueous solution Ca2-, Mg2- form a stable chelate compound, but also have been formed, and CaCO3 crystals phosphonic acid), since chelation Ca2-, so that CaCO3 scale layer many voids, reduce the interaction between the scale layer, the hard scale becomes debris in the pot of water to the boil, it played a role in the erosion and the dispersion, together with the waste water drain. The use of renewable organic polycarboxylate self-release effect and the descaling effect. Organic polycarboxylate heat transfer surface can form a film with such a film which is co-precipitated layer of scale grows to a certain extent will break, and the heat transfer surface away together with the scale, come off. Sodium humate by osmosis. Sodium humate has a strong penetration effect, can penetrate into the scale and the metal contact surface with calcium, magnesium metathesis reaction, the surface adhesion decreases old scale and metal fall off. Application Examples Example 3 a factory a KZL2-8 Horizontal package boilers, raw ground water, 10.Mg2 + hardness meter), although the water treatment equipment, due to poor water quality, combined with improper operation, junction raw scale, covering area of ​​more than 90%, the average thickness of 45mm, the thickest of 11mm. after pickling, whichever residual scale, through experiments, is determined sulfate scale. By its nature, the program uses the following: ⑶ epileptic), then cast added Na2C3, will increase the alkalinity boiler water to 18), an amount calculated as follows: G = the amount of V ° (D-D of the standard) MG-Na2C3 of , g; V- boiler water capacity, m3 (2t / h boiler by 4 meter) D required to achieve standard pan of water alkalinity, mmol / L (OH, D assay time of a pot of water alkalinity, mmol molar mass / L-NaC3 of persons Na2C3 after the above-described embodiment the dosage amount, than before dosing boiler water turbidity increases, first, because the agent itself increases the salt content, the second is the scale under the effect of the agent, gradually slag into water. over time, gradually reduce turbidity, running six months later, most of the remaining scale is removed a few off the bottom of the drum, into the soft dirt, water residue will easily become excluded. example two factory Taiwan KZL4-10 horizontal packaged boiler, no water quality testing prior to installation, commissioning a mistake softening equipment, water quality criteria is not met, resulting in the installation of new boilers three months after the operation, Wall Sheung scale portion is blocked, and the emergence of squib, replacing the 6, the remainder of the scale Of about 4mm, the individual parts 7 ~ 8mm. After pickling, the scale remaining large as replenishment of water in the furnace of the trona 3.5mmol / L, when the multi-alkalinity boiler was maintained at 15 ~ 20mmol / L or so ( OH, F COT), so there is no dosing Na2C3, adding only a HEDMP, HEMA and sodium humate, running four months, a significant reduction in the residual scale. problem most exposed parts of the metal to be noted that dosage .4 agent to remove residual main scale, must be strictly controlled boiler feed water or demineralized water hardness 0.03mmol / L or less (by Shi Ca2 ' "1Mg2 ten dollars), into the pot to prevent hardness scale and consumption of new raw junction agent. For this purpose, examples of a case of re-commissioning the softening equipment, examples of two direct replacement softening equipment, and analysis of operating personnel have been trained .5 conclusion after more residual scale boiler pickling, do not allow continuous pickling can be adopted pot-treatment method to solve.

Distinctive feature low nitrogen gas supermarket steam atmospheric pressure fire tube boiler is lower NOx emissions. Nitrogen oxides cause acid rain and the greenhouse effect major hazards, our country is in deep renovation. In Beijing, Zhengzhou, Xi'an, 30mg limit nitrogen oxide emissions in the area so strict, we must use low nitrogen gas boiler technology in order to join the normal start.

Fangkuai Boiler is based on low-nitrogen energy-saving and environmental protection. It focuses on the development trend and uses universal excellent technology, products and services. According to such a method, it is now applicable to the development of society around the world, promotes cutting-edge work in the future manufacturing industry, and maintains the ideal use of customers in various industries.

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