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The method of starting the boiler during boiler startup control drum wall temperature difference of the process to be controlled in a predetermined drum wall temperature difference may take the following measures within 40 ℃: (1) water temperature before ignition can not be too high, not too fast speed, according to rules of execution. (2) water is completed, the bottom may be put into steam heating conditions. (3) strictly control the raising rate, in particular 0 ~ 0.981MPa boosting speed stage should be less than 0.014MPa / min. Rate of temperature rise not greater than 1.5 ~ 2 ℃ / min. (4) should be regularly switching angle oil gun, until the next row when four full cast oil gun, each part as far as possible evenly heated. (5) via the above-described operation can not effectively control the drum, the lower wall temperature, then when the approach or reach 40 ℃ booster should be suspended, and the sewage regularly, in order to enhance the circulating water, and stabilized until the temperature difference is less than 40 ℃ line boost.
A diffusion combustion concept: it is a relatively simple combustion of the fuel and air are fed to the combustion chamber, while mixing combustion to produce a longer flame, and exhibits mostly red and yellow. Advantages: no premixing in advance, but the gas nozzle mouth interdiffusion, and then burned. Combustion is relatively simple, no tempering, and other undesirable phenomena from the flame, the flame burning more stable. Disadvantages: Due to a longer flame, and prone to incomplete combustion occurs, so resulting in additional carbon monoxide and hydrogen compounds, the fuel can not be fully utilized, the thermal efficiency of the boiler also decreases, the boiler is difficult to achieve emission standards. Second, the combustion of partially premixed combustion air yet, compared to the diffusion combustion, having a partially premixed combustion complete combustion, the flame is short, a large thermal strength advantage, but this may cause combustion tempering, from flame from the fire phenomenon and, under good control of the primary air prerequisite, can realize a flame does not leave a range, a stable flame area is not tempered, this region can be adjusted in the heat load ratio. Partially premixed combustion in gas appliance in the civil more widely. Third, refers to the premix combustion air and fuel required for full and accurate fuel previously mixed, and then fed to the burner for combustion. Which is characterized by a short flame length, adhesion to the burning surface, or even see the flame, also known as flameless combustion. Advantages: fuel combustion more fully, higher utilization, boiler thermal efficiency are increasing. Fang fast premix gas boiler thermal efficiency can reach 108% of the combustion efficiency. At the same time, fewer air pollutants discharged, in line with our air pollution emission standards implemented. Disadvantages: Due to the need for premixing fuel and air, fuel combustion stability will be relatively worse, measures need fireworks from the flame stability and to prevent tempering.
National Day holiday just ended, Shenyang Environmental Protection Bureau threw himself into the urban environment construction. Before the onset of winter, the Shenyang municipal government will strictly control the air pollution problem. It is reported that Shenyang Environmental Protection Bureau issued out since November 1, Shenyang will strictly enforce the standards of air pollutants emission limits in particular, all the environmental standards of heating enterprises will be cleared out of the heating market.
Shenyang Environmental Protection Bureau issued "on the thermal power industry, coal-fired boilers execution of air pollutants in particular emission limits of the notice" in the next year (the "Notice") requires: Thermal power within the gamut of Shenyang, iron and steel, petrochemical industry and fuel emissions of air pollutants in coal boiler project "thirteen five" period should implement special emission limit standards.
Shenyang is also a good environmental citizen blue sky, Shenyang City this winter and will continue to adhere to "turn point furnace, load shifting blocked arteries," the implementation of standards. After heating units gradually open blocked arteries, Municipal Environmental Protection Bureau will strengthen the routine inspection of law enforcement, and pay close attention to on-line monitoring data 474 coal-fired boilers, boiler emissions of non-compliance immediately ordered to carry out rectification, and severely dealt with strictly waste-water treatment, ultra row of such acts. At the same time, the Shenyang municipal government will also heating units regularly conduct random sampling of coal quality.
It is understood, Shenyang open blocked arteries in succession since October 26 from heating. To ensure that excessive heat stable and safe operation standards, Shenyang will be fully commissioning of heating facilities, to solve problems in a timely manner to ensure the November 1 time blocked arteries heating, the temperature reaches above 18 ℃. After the blocked arteries, Shenyang will strictly implement the winter heating emergency plans to complete the repair within 6 hours general accident, complete repairs within 24 hours more accidents.
Shenyang Environmental Protection Bureau official says, the environmental protection department will be heating business day on-line monitoring, and strictly control their emissions of air pollutants. Over the years, Shenyang has been doing the heating business "remove small and large," the relevant measures, so that some can not afford to increase environmental protection facilities of small companies to large companies merge powerful, let Shenyang municipal heating more environmentally friendly. Strict implementation of the special emission limits of air pollutants standards, both national policy, but also the heating of corporate responsibility, companies must increase investment in environmental protection to ensure the discharge standards.
It is understood that this year, the Shenyang municipal heating will continue to increase the proportion of clean energy, clean coal existing store 230,000 tons, an increase of 30,000 tons last year. Shenyang City, natural gas and other clean energy heating an area of 150 million square meters, clean heating the proportion reached 45%, up 6% over last year. Reduction of 1 million tons of total coal year, 5000 tons of coal-fired boilers to complete denitrification, the city starting from November 1 particularly strict implementation of air pollutants emission limits.
When gas boiler Sheung Shui, six rules to follow: 1, substandard quality boiler feed water can not enter. 2, boiler water filling should be carried out when the ambient temperature exceeds 5 ℃, otherwise freezing measures need to be taken. 3, if the boiler body changes after the first start, before and after the Sheung Shui, the designated persons must record the value of each indicator indicates expansion, and expansion analyze whether conditions in a normal state. 4, need to have someone to monitor the discharge air collector box Sheung Shui, the separator discharge air inlet duct, the air economizer door, the door when the air in time continuous take off water to prevent water running phenomenon. 5, the system should be checked Sheung process piping, valves, whether there is a leak phenomenon; if there is, then stop Sheung observed changes in the water level in the storage tank system is determined tightness. If you find a leak or the water level drops, should stop Sheung Shui, and look for reasons to eliminate contact.