30results about How to "Stable furnace pressure" patented technology

The invention relates to the technical field of heating furnaces of heat treatment equipment applied in the steel rolling industry, in particular to a high-efficiency intelligentized heating furnace control method. The method adopts a PLC (programmable logic controller) system for field control and an upper computer operating system communicating and connected with the PLC system to form an intelligent control system, and moreover, the intelligent control system is utilized to efficiently, scientifically and intelligently control a heat furnace. The method is characterized in that the intelligent control system controls and sets the heating furnace in the following six aspects: (1) furnace temperature control; (2) internal pressure control; (3) air-fuel ratio control; (4) safety protection system control; (5) adoption of an human-machine interface (HMI) on the intelligent control system; (6) history data recording. The method can reasonably control heating temperature, furnace temperature and furnace pressure at each stage in real time, increases the heating utilization rate, has an outstanding effect in saving energy and reducing consumption, increases the production efficiency, reduces the production cost, and prolongs the furnace service life.

The invention discloses an optimized air-distribution control system for an industrial furnace. A combustor is connected with a fuel valve and an air valve connected with a hot air tube, a flue is connected with the inlet of a heat exchanger, and the outlet of the heat exchanger is connected with an induced draft fan set driven by an induced draft speed governor. A bypass valve is arranged betweena cold air tube and the hot air tube, and the cold air tube is connected with an air outlet of an air blower set driven by an air blast speed governor. An outlet of a sampling tube is connected withan flue gas oxygen concentration analyzer; a signal output end of the flue gas oxygen concentration analyzer is connected with a first signal input end of a controller, a second signal output end of the controller is connected with a control signal input end of the induced draft speed governor, a furnace pressure duct is connected with a pressure transmitter a signal output end of which is connected with the second signal input end of the controller, the first signal output end of the controller is connected with the control signal input end of the air blast speed governor, and a communicationport of the controller is connected with a human-computer interface. The invention controls the rotate speed of the induced draft fan set and the air blower set driven by the speed governors throughdetecting the pressure and flue gas oxygen concentration values in the furnace on line so that the furnace is in the optimized air-distribution state all the time.

The invention relates to the technical field of carbon roasting furnace smoke pollutant treatment, in particular to a carbon roasting furnace smoke pollutant heat storage incineration furnace and a treatment method thereof. The carbon roasting furnace smoke pollutant heat storage incineration furnace comprises a combustion chamber, heat storage chambers, a reversing system, a reverse burning system and a purging system; two sets of heat storage chambers are provided; each set of heat storage chambers comprises more than three heat storage chambers; the two sets of heat storage chambers are symmetrically arranged on the two sides of the incineration furnace; the heat storage chambers directly communicate with the combustion chamber; the two sets of heat storage chambers communicate by the reversing system; and the heat storage chambers communicate with an exhaust pipe through the reverse burning system. A heat storage technology is applied to the carbon roasting furnace smoke pollutanttreatment, and comprises heat storage, combustion oxygenolysis, combustion heat relief, purging and reverse burning; smooth incineration of carbon roasting furnace smoke pollutants can be guaranteed;the smoke emission accords with the air pollution release standard; the heat storage energy saving characteristic is achieved; the energy consumption is reduced; and the treatment cost is reduced.

The invention provides an energy-saving combustion and waste heat recovery system of a quick aluminum melting furnace. The energy-saving combustion and waste heat recovery system of the quick aluminummelting furnace comprises a furnace body, a combustion system and a waste heat recovery system. The furnace body comprises a vertical melting furnace and a transverse holding furnace. The combustionsystem comprises a first fuel spray nozzle, an ignition nozzle and an air spray nozzle, wherein the air spray nozzle is used for guiding the preheated air into the holding furnace in the mode that thepreheated air serves as the combustion-supporting gas. The waste heat recovery system comprises a first heat storage chamber, a second heat storage chamber and a reversing device. The purposes that the heat storage chamber on one side stores the waste heat generated by combustion of the melting furnace, the heat storage chamber on the other side preheats the combustion-supporting gas of the holding furnace, and the operation is alternatively conducted according to the preset time cycle are achieved. The problems that in the prior art, a melting furnace and a holding furnace are low in waste heat recovery efficiency and high in the waste heat recovery difficulty, and due to the fact that the combustion temperature in the melting furnace is high, thermal power type NOX is prone to being generated when the air serves as the combustion-supporting gas are effectively solved, the overall energy consumption of the combustion system is reduced, the flue gas of the system is effectively balanced, and the waste heat recovery efficiency is improved.

The invention provides an automatic furnace-pressure control system for a forging heating furnace. A pressure detector (2) is mounted in the furnace body of the forging heating furnace, a gas flowmeter (3) is mounted in a smoke exhaust duct of the forging heating furnace, the signal output end of the pressure detector (2) and the signal output end of the gas flowmeter (3) are in signal connection with a signal input end of a PLC controller (4), and the signal output end of the PLC controller (4) is in signal connection with a frequency converter (1-1) of a smoke exhaust fan. The automatic furnace-pressure control system for the forging heating furnace has the advantages that due to the adopted technical scheme, a control signal is transmitted to the frequency converter (1-1) of the smoke exhaust fan so that the frequency converter (1-1) regulates the rotating speed of the smoke exhaust to control the smoke exhaust amount, and therefore, the purposes of stabilizing the furnace pressure, saving the energy consumption, reducing the smoke exhaust temperature and reducing noise are achieved.

The invention provides an oxygen-fuel combustion system for a steel rolling heating furnace. The oxygen-fuel combustion system comprises the heating furnace, a fuel system, a combustion-supporting system, a nitrogen purging system, a smoke exhaust system and a control system. The heating furnace comprises a preheating section, a heating section and a soaking section. Total-oxygen flameless combustors are arranged on the side walls of the upper heating area and the lower heating area of the heating section, and the total-oxygen flameless combustors are arranged in an up-and-down layered and left-and-right staggered mode. Total-oxygen flameless combustors are arranged on the side walls of the upper heating area and the lower heating area of the soaking section, and the total-oxygen flameless combustors are arranged in an up-and-down layered and left-and-right staggered mode. Total-oxygen flameless combustors are arranged on the end wall of the heating area on the upper portion of the soaking section and are horizontally arranged in a single-layer mode. The control system comprises a blank tracking system, an intelligent temperature control system, a hearth pressure control system, a linkage alarm protection system and a blank heat preservation rolling waiting system. The combustion efficiency and the heat transfer efficiency of the steel rolling heating furnace are improved, and the purposes of improving productivity, saving fuel, reducing emission and improving product quality are achieved.

The invention discloses a premixed regenerative combustion device. The premixed regenerative combustion device comprises a furnace body, wherein a hearth is arranged in the furnace body; three branch pipes are arranged at the lower part of the hearth and sequentially connected with a first regenerative chamber, a second regenerative chamber and a third regenerative chamber from left to right; the first regenerative chamber is fixedly connected with an induced draft fan through a flue gas pipeline; a flue gas reversing valve is arranged in the flue gas pipeline; a first gas pipeline is mounted at the lower part of the first regenerative chamber; a gas valve is arranged in the first gas pipeline; a control wrench is mounted on the outer side of the gas valve; a second gas pipeline and a combustion-supporting gas pipeline are correspondingly arranged on the left side and the right side of the lower part of the second regenerative chamber; and a combustor is arranged in each of the first regenerative chamber, the second regenerative chamber and the third regenerative chamber. The premixed regenerative combustion device is smooth in smoke discharging, stable in furnace pressure, high in total flue gas waste heat recovery rate, and uniform in in-furnace temperature distribution, realizes high-temperature nitric oxide combustion and is more energy-saving, environment-friendly and safer.

The invention relates to a system and method for rotary pyrolysis treatment of domestic sludge. The system comprises a sludge pyrolyzing furnace and a fluidized bed in sequential arrangement, wherein a reaction chamber, a tray and a burner are arranged in the sludge pyrolyzing furnace; the tray is rotatably arranged at the bottom of the reaction chamber; the burner is arranged above the tray in the reaction chamber; a pyrolysis raw material inlet and a pyrolysis oil gas outlet are formed in the top of the sludge pyrolyzing furnace; a pyrolysis carbon outlet is formed in the bottom of the sludge pyrolyzing furnace; and the fluidized bed is used for receiving and activating pyrolyzed carbon. The technical scheme of the invention avoids the problems of the original fluidized bed pyrolysis technology that lots of dust is generated by insufficient pyrolysis of pyrolysis raw materials, some solids being fluidized enter a pipeline and a dust removal system along with the pyrolysis gas and cause blocking and heavy dust and further lead to fault pause and maintenance; and in the invention, a relatively good pyrolysis effect and direct resource utilization can be realized while the cost is low.

The invention discloses a high temperature ejector. The high temperature ejector comprises an ejector shell, a first cone pipe section, an isometric pipe section and a second cone pipe section which are sequentially communicated with one another, wherein the diameter of the rear end of the first cone pipe section is less than that of the front end of the first cone pipe section; the diameter of the rear end of the second cone pipe section is greater than that of the front end of the second cone pipe section; the front end of the ejector shell is provided with a furnace gas suction inlet, and the rear end of the second cone pipe section is provided with a furnace gas exhaust hole; a power pressure inlet is inserted into the ejector shell from the outside of the ejector shell, and the outlet of the power pressure inlet is arranged on a communicating part of the ejector shell and the first cone pipe section; the outlets of first and second protective nitrogen gas input pipes outside the ejector shell are communicated with the ejector shell; the ejector shell is supported and fixed on a first fixed support, and the second cone pipe section is arranged on a sliding support in a supporting manner. The high temperature ejector provided by the invention has the advantages that the negative pressure purification of furnace gas is changed into positive pressure purification, the furnace pressure of a calcium carbide furnace is relatively stable, the operation rate of the calcium carbide furnace is improved, and the yield is increased.

The invention relates to a furnace pressure control method and device for an annealing furnace. The furnace pressure control method is applied to each furnace section of the annealing furnace, an injecting pipeline for injecting protection gas is arranged at each furnace section, and a flow controller is arranged on each injecting pipeline. The furnace pressure control method comprises the following steps that the current furnace pressure value of the annealing furnace is obtained, whether the furnace pressure value meets the pre-set furnace pressure range is judged, when the pre-set furnace pressure range is met, based on the furnace pressure value, the flow correction coefficient of the injecting pipeline in a target furnace section and the flow rating of the corresponding injecting pipeline, and the flow correction value for correcting the flow controlled by the flow controller on the corresponding injecting pipeline is obtained; and based on the flow correction value, correcting control is conducted on the corresponding flow controller, so that the furnace pressure of the annealing furnace is stabilized, and the quality of strip steel in the annealing furnace is ensured.

The invention relates to an efficient energy-saving boiler, and relates to the technical field of boiler manufacture. The efficient energy-saving boiler comprises a hot water boiler and a waste heat recovery furnace. The hot water boiler comprises an enlarged hearth and a hot water furnace barrel which are connected with each other and which form a T-shaped structure. The waste heat recovery furnace is in a T-shaped structure and is provided with an annular water chamber. The opening end of the waste heat recovery furnace is sleeved on the hot water furnace barrel of the hot water boiler, and the periphery of the opening end of the waste heat recovery furnace is flexibly connected to the periphery of the connection of the hot water furnace barrel and the enlarged hearth in a sealed manner. The efficient energy-saving boiler has the advantages of simplicity of cleaning, convenience, high heat energy utilization rate and the like.

The invention discloses a TFT liquid crystal glass kiln furnace pressure stabilizing device which comprises a steel flue assembly, a condensate cleaning assembly is arranged in a condensate pipe opening of the steel flue assembly in a telescopic mode, a condensate falling pipeline assembly is fixedly arranged at the bottom of the steel flue assembly, and when condensate exists on the top of the steel flue inlet pipe, an upper gate valve is opened, a lower gate valve is closed, it is ensured that the whole steel flue is still in a closed state, and thus it is ensured that the furnace pressure is stable, telescopic translation of the semicircular condensate receiving disc in the steel flue inlet pipe is achieved through rotation of the first driving motor and cooperation of the internal thread translation block and the translation screw rod, and when the condensate is cleaned, the semi-circular condensate receiving disc extends into an inlet pipe of the steel flue, the condensate scraper rotates in the semi-circular condensate receiving disc in a scraping mode through rotation of the second driving motor and cooperation of the scraper rotating rod and the hexagonal guide rod, and scraped condensate falls into the semi-circular condensate receiving disc.