61results about How to "Stable furnace temperature" patented technology

The invention discloses a method for burning sludge in chain grate. A sludge feeding port is arranged on rear arch on the side surface of the chain grate used in the method; and coal and sludge are respectively added into the furnace of the chain grate. The method comprises following steps: adding the coal into the grates of the chain grate through a coal valve from a coal scuttle in front of thechain grate; preheating, drying, and burning the coal sequentially along with the movement of the grates of the chain grate; uniformly adding the squeezed and dewatered sludge alone from the sludge feeding port into the chain grate, wherein the sludge falls onto the grates in a position in the vicinity to the rear arch at 1 / 2 to 3 / 4 the tail section of the furnace of the chain grate; and ignitingand burning the sludge added in the position by the temperature of the tail section of the furnace of the chain grate when the coal burning is substantially ended, wherein the added amount of the sludge is calculated and adjusted in real time according to the heat value of the coal and the temperature when the added amount is stabilized. The chain grate can ensure complete burning of coal when used for burning various kinds of sludge with heat energy utilization value, thus effectively utilizing the heat value of the sludge and improving the heat efficiency of the chain grate.

The invention discloses a filling bed COREX stove braise preparing and blowing method which comprises the following steps of: a) putting mine run coal which is applicable to melting in the COREX stove and producing reducing gas into a run coal bin by crushing and screening the mine run coal into crushed coal; b) milling the crushed coal to minus 200 meshes and above 60 percent by a coal-milling device provided by a coal feeder and carrying out drying at the same time; and c) putting the finished braise into a pulverized coal bunker after the separation of gas and powder; loading the braise into 2 or 3 coal injecting tanks sequentially; transporting the braise to a distributor mechanism positioned at the top of a melting gasification furnace of the COREX stove by using pressured gas after the processes of pressurizing fluidization and gas supplement; distributing the braise to the blowing branch pipe which is led to the oxygen tuyere of the melting gasification furnace; spraying the braise into the melting gasification furnace by a coal injection gun. The method has the advantages that the in-place digestion and utilization of powder sifted range coal of the filling bed COREX stoveis realized; and the total coal consumption of the COREX stove can be reduced by replacing part range coal; therefore, the cost of production is reduced; more optimized COREX melting reduction process and more flexible operation are realized.

The invention discloses a combined protection smelting furnace and a smelting method. The combined protection smelting furnace consists of a big furnace body, a small furnace body and a water gas system, wherein the big furnace body is heated by alternating current, water gas is injected into the big furnace body, ores are arranged in the big furnace body, and the small furnace body is communicated with the big furnace body; the water gas system is provided with a water gas generator, a purifier, a cooler and a pressure-increasing pump. The water gas of which the pressure is increased is led into a rectangular annular pipe and a plurality of vertical spraying pipes above the big furnace body, and is sprayed into the ores during smelting. Carbon oxide and hydrogen in the water gas reduce metal oxides in the ores into metal, so that the metal recovery rate is greatly improved; inert gases in the water gas protect the reduced metal against decomposition, so that residual metal in exhausted tail gas after smelting is none, and air is not polluted; metal content in waste residue is greatly reduced, and the requirement of environment friendliness on a building material is met; the small furnace body can increase the space and time for metal deposition of slag liquid, and the improvement of metal recovery rate is promoted; the smelting process is continuously and automatically performed, so that compared with the current method that smelting and emission are performed one furnace by one furnace by continuously increasing and reducing an alternating-current electrode, the smelting method has the advantages that about 15 percent of electric energy is saved and the efficiency is greatly improved, and the method can be used for smelting various metals, such as copper, from the ores.

The invention relates to a device for semiconductor laser unit Zn impurity source diffusion. The device comprises a first diffusion heating furnace and a second diffusion heating furnace which are arranged on a track in sequence. The first diffusion heating furnace is in the shape of a groove with one end sealed. The second diffusion heating furnace is in the shape of a hollow-out ring. The position, at one end of the track, behind the second diffusion heating furnace is provided with a support. The support is provided with a quartz tube with one end sealed and the other end open. A first thermocouple and a second thermocouple are sequentially arranged in the quartz tube in the longitudinal direction. The front-half portion of a quartz boat is arranged on the first thermocouple. The rear-half portion of the quartz boat is arranged on the second thermocouple. According to the device, the separation of a diffusion source and a chip is adopted, a double-temperature area is adopted to control the temperature of the diffusion source and the temperature of the chip, and during the diffusion process, the temperature of the diffusion source and the temperature of the chip are controlled so that the stability of a furnace temperature can be guaranteed; GaAs on the surface layer of the chip of a laser unit is prevented from decomposing in large quantity under the diffusion temperature, so that a high-concentration surface layer which has the advantages of being bright in surface, even in distribution of the Zn concentration, good in repeatability, and free of damage is obtained.

The invention relates to the field of power generation coupling of power plants and clean coal production, and discloses a method and system for power generation coupling production of clean coal in power plants. The method comprises: (1) indirectly heating the raw coal with the first flue gas at 800-1200° C. The second flue gas at 800-1200°C of the power plant boiler indirectly heats the converted coal to remove impurities from the coal to obtain the second flue gas, the second pyrolysis gas and the impurity-removed coal; (3) the first pyrolysis gas After merging with the second pyrolysis gas, tar is removed to obtain tar and coal gas; the coal gas is returned to the burner of the power plant boiler in the form of return air, and the first flue gas and the second flue gas are combined into return flue gas and sent to the power plant boiler Used for power generation; (4) dry-cooling the de-miscellaneous coal to obtain clean coal. While realizing the normal power generation and production of the power plant, low-rank raw coal is produced into clean coal.