57results about How to "Avoid resynthesis" patented technology

The invention relates to a regenerative combustion device. The regenerative combustion device comprises at least three regenerative combustors connected with a furnace hearth and a controller capable of controlling the regenerative combustors, the regenerative combustors are switched by the controller to be alternately used for combustion or smoke exhaust, and therefore the number of the regenerative combustors, used for smoke exhaust, of the device is larger than the number of the regenerative combustors, used for combustion, of the device at any time. Compared with the prior art, the regenerative combustion device is smooth in smoke exhaust, stable in furnace pressure, high in overall flue gas waste heat recovery rate and even in temperature distribution in a furnace, high-temperature low-nitrogen oxide combustion is achieved, more energy is saved, environmental protection is achieved better, and the device is safer.

The invention relates to a progressive switchover heat storage type combustion device. The progressive switchover heat storage type combustion device comprises at least five heat storage type combustors connected with a hearth and a controller capable of controlling the heat storage type combustors. The controller switches over the heat storage type combustors, so that the heat storage type combustors are alternately used for combustion or smoke exhaust, and the number of the heat storage type combustors used for smoke exhaust is made to be larger than that of the heat storage type combustors for combustion at any moment; in combustion production, when the controller switches over any heat storage type combustor, at least another heat storage type combustor maintains combustion work. Compared with the prior art, in the steering process of the device, the phenomena of detonation and furnace blast are effectively avoided, the safety performance is better, and the energy-saving effect is more obvious.

The invention relates to a smoke gas purification device by a semidry process, which is provided with an independent desuperheating tower, comprising a reaction tower provided with an smoke inlet box, a smoke gas outlet, a venturi tube type tower wall arranged on a tower bottom, a water injector arranged on the tower wall and a nozzle for lime dry powder and revert dust; and the smoke gas outlet is connected with an inertia separator, an activated carbon mixer, a bag-type dust remover and a draught fan. The invention is characterized in that the invention is also provided with the desuperheating tower which is provided with a boiler smoke gas inlet manifold, a single-stage water injector, an ash bucket with an ash hole and a gas flue; the gas flue of the desuperheating tower is connected with the smoke inlet box into one unit. The boiler smoke gas disperses within the two towers for cooling, thereby improving the adaptability of a system to a load; the boiler smoke gas particularly can be cooled down urgently to a set temperature in the desuperheating tower; and the reaction tower can be humidified only by evaporation with a little water to complete a deacidifying reaction and remove dioxin, thereby avoiding the disadvantages of scale formation on the tower wall of the prior reaction tower and bag burning of the bag-type dust remover, guaranteeing a sustaining and stable smokepurification process and having the advantages of good purification effect and low energy consumption.

The invention discloses a device and method for treating solid waste with thermal plasma, which includes a plasma melting pyrolysis furnace, a thermal plasma generating device, a working gas preparation and supply device, a feeding device, slag discharge and molten metal Emission device, exhaust gas purification treatment system and corresponding measurement and control system. The invention can completely destroy the toxic and harmful organic components in various solid wastes, prevent them from being re-synthesized, and at the same time basically convert the wastes into useful gases, stable, non-leaching toxic glassy slag and recyclable Metal components; and the amount of flue gas generated during the disposal process is very small, the purity of the usable gas is higher, the cost of tail gas purification is lower, and the tail gas can meet the emission requirements of air quality standards after purification.

The invention discloses a device for extracting fiberglass from the nonmetallic materials of a waste printing circuit board as well as an industrial production technique. The device is connected with an electric heater (2), a fluidized bed reactor (5), a first grade cyclone separator (6), a second grade cyclone separator (7), an intermediate frequency heater (3) and a B draught fan (8) in sequence from an A draught fan (1) to a liquid dust remover (9); a feed device (4) is arranged on the fluidized bed reactor (5). In the technique for extracting fiberglass from the nonmetallic materials of awaste printing circuit board, firstly high temperature thermal decomposition is carried out in the fluidized bed; then multi-grade separation is carried out in the cyclone separator for obtaining thefiberglass; then high temperature decomposition is carried out on a gas product in the intermediate frequency heater; finally, a sharp quenching lye absorbing treatment is carried out; the technique can effectively push and promote the broad utilization of the nonmetallic materials in the waste printing circuit board. The fiberglass extracted by the industrial production technique can be used formanufacturing the compound materials of various fiberglasses for realizing the recycling of the nonmetallic materials of the waste printing circuit board with high added value.

The invention discloses a household garbage classified gasification system with rotary kiln gasification and plasma fusion capability. The household garbage classified gasification system comprises a rubbish feeder, a rotary kiln type pyrolysis vaporizer, a metal sorting machine, a crusher, a high-temperature cyclone separator, an ash hopper, an ash feeder, a plasma fusion furnace and an air preheater; household garbage is sequentially subjected to the pyrolysis gasification, metal sorting and crushing of the rotary kiln type pyrolysis vaporizer and the further gasification treatment of the plasma fusion furnace; the low-temperature rotary kiln vaporizer and the high-temperature plasma fusion furnace can be effectively combined, and the ash generated by pyrolysis and gasification of the rotary kiln vaporizer is fused by virtue of taking plasma torch as a high-quality heat source; the household garbage classified gasification system can effectively take the heat of synthesis gas and the gas fume generated by the fusion furnace as an outer heat source of the rotary kiln vaporizer so as to heat the air entering in the plasma fusion furnace, the comprehensive energy use efficiency is improved, and the secondary pollution problem of dioxin and heavy metal is avoided.

The invention provides a control method of regenerative combustion equipment. The method includes an igniting step, a starting step, a combustion step and a switching step. The method overcomes the technical bias that the regenerative combustion equipment is controlled in pairs with a traditional method and achieves an unexpected energy-saving technical effect, and the phenomena that in an existing high-temperature air combustion technology, detonation and furnace explosion happen easily in the reversing process, and fuel waste is serious are effectively avoided.

The invention provides a control method of a regenerative combustion device. The method includes a starting step, a combustion step, a switching step and a circulation step. Compared with the prior art, the method has the outstanding technical effects of being smooth in smoke exhaust, stable in furnace pressure, small in temperature difference, good in heating quality, remarkable in energy-saving effect and little in pollutant discharge. Thus, the method belongs to an environment coordination type regenerative combustion technology.