32results about How to "Running energy saving and environmental protection" patented technology

The invention relates to a public wireless communication network-based intercom system, a registration and control method thereof. The intercom system comprises public communication terminals and private communication terminals accessing to a public wireless communication network respectively, wherein each public communication terminal consists of one or more management units and one or more doorphones; each private communication terminal consists of one or more communication terminals of an indoor unit of each unit owner and / or a mobile phone and / or a PSTN public telephone network; and the management unit and the door phone are provided with registration information used for realizing communicating junction between each public communication terminal and each private communication terminal, and among the public communication terminals respectively. The intercom system has the advantages of low cost, maintenance-free system networks, flexible networking, rich functions of indoor unit type, convenient selection for the owner, convenient system upgrade, convenient introduction of a third-party service and the like.

A chain type environment-friendly double-drum biomass particle gasifying burning hot-water boiler comprises a furnace, an upper chain grate drum and a lower chain grate drum. A pre-heating burning closed arc-shaped arch, a pre-heating burning net-shaped arc-shaped arch wall, a high-temperature radiation burning arc-shaped arch wall, a high-temperature radiation burning closed top arch connected with the tops of the pre-heating burning net-shaped arc-shaped arch wall and the high-temperature radiation burning arc-shaped arch wall, an arc-shaped smoke return arch and a convection residue-depending burning arc-shaped hearth are sequentially arranged in the furnace from the front. A smoke-return high-radiation inclined elongated heated arch is arranged on the upper portion of the convection residue-depending burning arc-shaped hearth. The upper drum and the lower drum are arranged on the back of the furnace and are connected by a heated pipe beam. Heated water-cooling wall pipes are distributed on two sides of the furnace, and the upper ends and the lower ends thereof are respectively connected with an upper heated water circulating pipe and a lower heated water circulating pipe connected with the upper drum and the lower drum. A high-radiation heated pipe is arranged below the high-radiation heated arch and connected with the lower drum. The chain type environment-friendly double-drum biomass particle gasifying burning hot-water boiler can burn gas and tar sufficiently and overcome the difficulty of blocking of a flue and the pipe beam, and is safe, reliable, energy-saving, environment-friendly and long in service life.