With the development of national economy and urban construction, the amount of municipal solid waste in China is increasing year by year, and the demand of urban environmental quality is increasing, municipal solid waste (msw) has become one of the difficult problems in municipal construction.
Landfill is the main method of municipal solid waste treatment, except a few of compost or other methods. However, in many large and medium-sized cities across the country, the existing landfill sites are already unable to meet the needs, and the selection of new landfill sites is increasingly far away from urban areas due to the expansion of urbanized areas, and it is difficult to move land, will inevitably increase the cost of garbage disposal.
At the same time, this traditional method not only takes up a lot of land resources, but also causes secondary pollution, and increases the traffic load of the city because of the long-distance transportation of large tonnage garbage. Moreover, with the continuous development of urban construction, this contradiction will become more and more prominent. Therefore, the effective treatment of domestic waste is a difficult problem in the current society, with the growing maturity of waste-to-energy technology, waste-to-energy incineration will be vigorously developed.
The instruments in the environmental protection power industry are widely used, from garbage cleaning, stacking, leaching, furnace combustion, to flue gas treatment and other links need: temperature, pressure and material level of online instrumentation for automatic control. These signals can be centralized to the central control room, the user can be very convenient in the central control room for remote monitoring and control of the scene. Improve the automation level of the plant, to achieve unattended, to ensure the safety of production site.
According to the different working conditions of each process link, it is necessary to use more suitable instruments for the field process, for example: in the dust removal link with the anti-rotation material level switch or tuning fork type material level switch to control the material level in the hopper, monitor and control the level of ash bin with radar level gauge or heavy hammer level gauge, monitor and control the level of auxiliary tank with floating ball level gauge or magnetic turnover level gauge during desulphurization and de-selling In addition in other links will also be used as well as the flow meter and pressure and differential pressure transmitter and so on. Air Hammer, air gun, air vibrator and other bridge-erecting equipment, can effectively improve the flow of materials, reduce the material in the bin wall, cut-off parts such as the accumulation and residue.