water tube boilers for hospitals

Industrial water tube boilers for hospitals 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.

Tai Chi, Jiaozuo City, Jiaozuo City Sports Center is one of important sports infrastructure, a total area of ​​11.73 hectares, held several international events. With strict management in Henan Province for air emissions of pollutants, Jiaozuo City, also launched the governance of coal-fired water tube boilers for hospitalss, thermal power and other equipment. Jiaozuo Sports Center actively cooperate with municipal workers, took the lead from coal to gas activities, the serious pollution of the original extent of coal-fired boilers to replace gas boilers. Gas boiler cleaning binding understanding of the market, to achieve cooperation with the finalization fast boiler by providing a fast side 2.8MW integrally condensing gas hot water boiler (WNS2.8-1.0 / 95/70-YQ), it is used to Sports Center provides heating and hot water.

Thermal efficiency and fire the water tube boilers for hospitals with a boiler efficiency of how to enhance the long-term course of their work, some of its parts will be some failures, which requires the relevant staff on a regular basis of its examination, so it will not affect the work of the boiler effectiveness. Also note that regular maintenance of the boiler, so as to improve the thermal efficiency of the boiler efficiency and the use of fire. Supporting domestic heating boiler feed, Fan efficiency is about 85%, with the heating boiler supporting GC boiler feed pump efficiency of 40% to 62%. And GC type commonly used to pump efficiency at 47% to 48% or less, indicating delivery, the lead fan efficiency, especially for pump efficiency is not high, great energy saving potential. Domestic manufacturing pumps and fans continue to produce some of the delivery of energy-efficient boiler, induced draft fan and feed pump. For example, suitable for 2 ~ 20t / h boiler supporting 5-48 series fans, the best total pressure efficiency up to 87.5%, energy-saving effect is obvious. For the current low in use efficiency, energy consumption of delivery, induced draft fan and feed pump, should improve the efficiency of technological transformation through various means or replacing new and efficient products. The new design of the boiler room should try to use energy-efficient delivery, induced draft fan and feed pump, supporting reasonable auxiliary boiler. So as to effectively reduce the power consumption of auxiliary boilers, improving the net efficiency of the boiler. Improve the efficiency of the boiler with fire, smoke and heat in addition to try to reduce exergy loss, so that the fuel combustion, the major measures to reduce the exergy loss in the furnace, i.e., combustion and heat transfer processes exergy destruction. Combustion process things with fire damage is due to the burning uncontrolled chemical energy into heat caused. The only feasible measures to minimize this damage by fire is to increase the combustion temperature. The main pathway is reduced heat transfer process irreversible exergy loss is to increase the average temperature of the working fluid absorbs heat. The working fluid in a steam boiler heat absorption, the liquid to go through a phase change to the gaseous state. In the phase transition, the working fluid temperature and pressure have strict constraints, I need to raise the temperature of this phase will have to simultaneously increase the pressure. Working fluid temperature and elevated pressure, will increase the average temperature of the working fluid absorbs heat, the fire 1KG steam with the value increase, of course, also marks improve the taste of steam, thereby increasing the fire boilers with efficiency.

Fangkuai Boiler Company answer: oil-gas water tube boilers for hospitals furnace negative pressure gauge indicator value suddenly increased; furnace black, from the fire hole can not see the flame; furnace combustion sound disappeared; flame monitor to send out fire signal; Air temperature, air pressure drops sharply, water level drops first and then rises, etc., all of which are extinguished. As a result of auxiliary engine accident cause extinguishment, such as induced fan, blower power interruption, also send out accident signal; if the fuel supply is interrupted, the fuel pressure of the oil-fired boiler is reduced to zero.

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