cmi 22 thailand hrsg boiler construction

Industrial cmi 22 thailand hrsg boiler construction 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.

An overview of how the steam-gas cmi 22 thailand hrsg boiler construction gas steam boiler: heat, water heated pot steam boiler with natural gas, liquefied petroleum gas, fuel gas such as city gas as fuel, the combustion in the furnace is released and allowed to vaporize into steam thermal energy conversion device. Water pan (drum) is continuously released from the combustion of a gaseous fuel energy to heat the furnace temperature is increased and produce steam under pressure. Since the boiling point of water increases with increased pressure, the pot is sealed, the expansion of water vapor generated inside the pressure limited thermodynamic formed, strictly speaking, the steam boiler is heated in water at constant pressure saturated steam drum regasification water formed, is widely used as an energy source.

Battle for winning Blue Sky, effectively improve the region's ambient air quality; Ningxia Hui Autonomous Region developed and published a "region-owned coal-fired thermal power units reconstruction plan for the ultra-low emission" (hereinafter referred to as the "Program"). "Plan" put forward plans before the end of 2020, nine companies owned coal-fired power plant 25 thermal power units for ultra low emissions transformation.

By the end of 2020, all the region's coal-fired thermal power units with self-transformation conditions by upgrading desulfurization, denitrification and dust removal facilities, the concentration of pollutants in atmospheric emissions all meet ultra-low emission requirements; long-discontinued businesses in the pre-production must be restored owned ultra-low emission coal-fired units to complete the transformation; gradually shutting down key areas do not have the conditions for the transformation of high-polluting coal-fired captive power plants; emission concentration of air pollutants new coal-fired gas turbine generator set to achieve set emission limits; the country City and Ningdong Management Committee in conjunction with the region's environmental quality improvement requirements, and actively promote the transformation of ultra-low emissions to arrange more than 65 tons of steam per hour of coal-fired boilers.

After the completion of the transformation project, owned coal-fired power plants should entrust a third party consultant for technical performance, environmental effects, equipment stability, comprehensive assessment, evaluation findings and issue.

In order to encourage enterprises to increase efforts to transform ultra-low emissions of pollutant emission concentrations below the pollutant discharge limits set by the state or place more than 50 percent, halved implement environmental tax policy. At the same time, we encourage financial institutions to give preferential credit support, to support eligible owned coal-fired thermal power enterprises to issue corporate bonds direct financing, to raise funds for ultra-low emissions and energy saving. According to the regional administration of appropriate incentive funding arrangements, to ultra-low emission reduction projects included renovation crew around them, give appropriate incentives based on emission reductions, combined with local conditions to increase financial support.

"Plan" requires all localities and departments should strengthen daily supervision and inspection of law enforcement to prevent corporate fraud, is not scheduled to complete the transformation of the self-ultra-low emission thermal power phase-out, discharge permit authorities to promptly subtract the emissions permit, for non-compliance business severely dealt with according to the law, to the public.

For different working pressures cmi 22 thailand hrsg boiler constructions, to have a separate steam pipes and water pipes, respectively. If when a combination of the main steam pipe, the steam pipe to be fitted with high pressure apparatus and the automatic depressurization safety device that prevents the low-pressure side of the overpressure. When the water pressure does not exceed 20% of the maximum pressure, the system can feed water to the boiler feed water from the total.

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