How to avoid the chemical processing enterprises boiler boiler water pollution chemical processing companies how to avoid water pollution? It is well known in the food production process, many sectors need to use boilers, such as cooking, faced with the problem of sewage treatment, also with a certain level sterilization, dry, wine and so on. In the country's growing emphasis on environmental protection, continue to increase supervision of enterprises under the enterprise adoption of what approach to avoiding disadvantages, complete sustainable development? Primary, flue gas collection equipment processing equipment. Since SMEs by financial constraints, skills, and other places, a time can not be cut all the transformation, it is possible, after passing through the coal-fired boiler exhaust gas purifying exhaust purification device tail device, such as a fume hood, an exhaust gas collection processing device, effectively to prevent the direct discharge of black smoke, a serious impact on the surrounding environment. Second, clean power conversion, such as coal gas, coal to electricity. I learned that a beer factory invested more than 10 million will replace all coal-fired boilers, gas-fired. Now, 180 tons of steam boiler plant now farewell all coal, burning a low nitrogen gas cleaning switch, effectively reduce pollution. And compared with previous coal-fired boilers, coal saving more than 80,000 tons per year business. Again, the original boiler for energy saving, skills promotion. Programming with the furnace arch, adjust the secondary air to optimize the planning aspects of the planning grate, uniformity of air distribution, so that plenty of fuel burned, burning power progress. It is understood, Shanxi, a business research and development of environmentally friendly gas-solid two-fired boiler using low-grade nitrogen incineration furnace desulfurization, flue gas purification tail, the whole active control and other skills to complete energy efficient, which means that the stop, auto-run and clean intent emissions. Eventually, equipment sewage treatment facilities. Many food processing plants because of waste water, untreated sewage discharge and perhaps willful discharge, was ordered rectification probably ordered the closure of news after another. Because food processing wastewater organics, heavy metals, a high concentration of suspended solids, wanton discharge highly contaminated water, soil and living environment. All in all, China's boiler industry, neither sunrise industry, not a sunset industry, food processing industry but indispensable industry. However, along with constantly promote the national energy saving policy, whether it is food processing enterprises, is still food machinery manufacturing enterprises, must always assume social responsibility, uphold the concept of energy saving, reduction may reduce pollutant emissions.
In response to national environmental policy development, improve the quality of people's living environment of the area, Guangdong Province, actively promote the boiler "coal to gas" action. Currently, Dongguan City, "from coal to gas," the work has entered a crucial stage, nearly two months, the city government, city atmosphere Office, the Municipal Development and Reform Bureau has organized a thorough inspection teams to supervise the Towns "coal to gas" work . Atmospheric do inspection personnel Lurui Quan admits: "From the inspection situation, many companies on the 'coal to gas' is still in the wait and see attitude, worried about the safety and cost issues."
As of March 25, Dongguan City, 26 companies of 37 coal-fired boilers (except coal-fired captive power plant boilers), it has been out of the 17 units, 14 companies were using natural gas. In addition, 12 companies of 20 coal-fired boilers, is expected to complete phase transformation within this year.
It is expected that in the near future, all industrial boilers transform the use of clean energy, Dongguan sky will be bluer.
Piezoelectric often pay attention to what is currently required boiler maintenance, boiler advanced piezoelectric often need to be applied in industrial production and daily life of boiler equipment. However, the electric boiler pressure part of mechatronics equipment running high. If the user in a timely manner to carry out boiler maintenance, oil equipment will lead the line, aging equipment, pump wear. Therefore, in the operation of the boiler, the user should pay attention to equipment maintenance. First, note that prior to detecting piezoelectric constant boiler shutdown maintenance or service, the user equipment in accordance with normal operation to achieve slow cooling shutdown procedure, while the user should use the boiler water circulation and ventilation furnace, boiler and the furnace temperature was gradually decreased. Second, note that partition is provided during maintenance, the combustion chamber and flue piezoelectric often tested to be separated from the main boiler flue or other operation of the boiler with the flue connected. And flue tightly closed, after isolation and ventilation. Further, using a blind partitioning plate device should have sufficient strength, stiffness, to avoid high pressure medium at atmospheric pressure electric boiler drum, indicating the position of the partition, to avoid confusion. Third, note that the detection device before the container inspection atmospheric pressure vessel, the user must be turned off connecting line between the container and the gas apparatus, especially in the passage of inflammable poisonous media device. Container equipment during maintenance equipment not only need to close the valve, you must also use the device Blind plate closed to prevent valve leakage, the leakage of flammable or toxic gas into the container, resulting in a fire, explosion or poisoning.
Several problems into a coal-fired boiler fuel gas boiler fired boilers changed several issues should be noted that the fuel gas boiler: fuel oil (l) high temperature corrosion of the fuel used in the boiler, containing an organic salt of a metal element as sodium, vanadium class, after combustion of the low melting point eutectic oxide crystals, generally of about 600 ℃, or even lower. These oxides sublimation at a high temperature furnace, then condensed in a lower relative temperature of the heated surface to form a high temperature corrosive fouling. Is characterized by high temperature corrosion: the metal began to appear at temperatures in excess of 580-620 deg.] C, the higher the temperature, the faster the etching. High temperature corrosion measures to prevent: l) the use of additives. Mainly magnesium, calcium oxide, hydroxide or dolomite (CaC03, MgCO3) and the like, these additives can generate a high melting point compound with the component acting in a high temperature fouling, the fouling becomes loose and shape, so as to avoid or mitigate high temperature corrosion. 2) use high temperature materials with good corrosion resistance, high temperature corrosion resistant chromium steel is better than the nickel-chromium steel. 3) coated with a protective film. Susceptible to corrosion in high temperature heating surface ceramic surface coating, a silicon carbide or silicon nitride special coatings, the heated surface may be aluminized other treatment to improve its high temperature resistance. 3) coated with a protective film. Susceptible to corrosion in high temperature heating surface and other surface-coated ceramics, silicon carbide, silicon nitride, or special coatings, the heated surface may be aluminized other treatment to improve its high temperature performance rot cloud. (2) low temperature corrosion in fuel sulfur generated during the combustion S02, since the fouling atomic oxygen present in the furnace and the convection heating surface and catalytic oxide film, SO2 is further oxidized to S03. S03 and H2S04 vapor in flue gas generated in conjunction with, the dew point of the flue gas containing the sulfuric acid vapor is greatly increased, when heated wall temperature below the dew point of sulfuric acid vapor will condense on the walls, and corrosion of the metal wall. Usually low temperature corrosion It occurs at the end of the air preheater of the boiler. Thus when burning high sulfur fuel, care must be taken to prevent low temperature corrosion. Prevent low temperature corrosion measures are: 1) low oxygen combustion. When the excess air at the outlet of the furnace lag coefficient down to 1.10 or less, for sulfur of the fuel oil used, the dew point of the flue gas will be significantly decreased, so as to avoid or mitigate low temperature corrosion. 2) use of additives. Sprayed into the furnace or flue additive in the curb generation of SO3 and to reduce the flue gas dew point temperature. Common additives solid (dolomite, limestone, magnesium oxide, and some special compound), the liquid (aqueous magnesium chloride solution, some oil soluble magnesium, calcium, zinc naphthenate compound) and a gas (ammonia gas, ammonia, three different ring) three categories. 3) raising the thermal wall temperature, so that it is higher than the dew point temperature of flue gas. Commonly used methods are: hot air recirculation inlet temperature of the air preheater increase; the installation of the heater core, air is heated by steam, a low temperature air preheater horizontal structure, the level of a horizontal pipe line is arranged an air preheater , the air flow in the pipe, the pipe between the smoke flow, erosion due to the lateral wall of the flue gas, the flue gas side heat transfer coefficient is increased to increase the wall temperature, more generally vertical wall temperature of the air preheater increase 20 ~ 25 ℃. 4) corrosion-resistant materials or corrosion resistant coating materials include glass, ceramics and the like; an anti-corrosion coating and had tried to enamel-coated surfaces like special steel anticorrosion paint. 5) timely sootblowing operation, and therefore should be a reasonable arrangement sootblowers. Fire and explosion of fuel failure (3) heating surface of the tail or incomplete combustion of atomized droplets gather in the tail of the heating surface, when it reaches ignition or explosion conditions, i.e., ignition and explosion may occur. The tail heating surface fouling aggravated by the possibility of aggregation of the oil droplets. Therefore, when coal-fired boilers into oil-fired boiler, burner should be correct and rational selection and delivery, and strictly develop from the induced draft fan. Rules and procedures for shutdown and normal operation to ensure good fuel atomization, with the wind reasonable. At each of the heating surface is arranged to be reasonable sootblowers. (4) determining the dew point temperature of flue gas is determined dew-point temperature of the flue gas has practical significance for the design and operation of flue gas dew point temperature factors influence mainly sulfur fuel ink, excess air coefficient, water vapor in the flue the amount of sulfur / cement ratio and combustion.
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