30results about How to "Stable furnace pressure" 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 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 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 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.

The invention discloses a fast forging hot cutting production system. The fast forging hot cutting production system comprises a heating device, a hot cutting device, a forging and pressing device andheat treatment equipment which are sequentially arranged. The hot cutting device comprises a material cutter, a material pressing mechanism, a material overturning and pushing device and a hot cutting workbench. The hot cutting device is connected with a heating furnace of the heating device, and a thermal insulation sleeve is arranged above the hot cutting workbench. The material cutter and thematerial pressing mechanism are arranged inside the thermal insulation sleeve. A first conveying device is arranged inside the heating device. A second conveying device is arranged between the hot cutting device and the forging and pressing device. By adoption of the integrated production line process, the steps of heating, hot cutting and forging are executed coherently, heat treatment after forging can be conducted continuously, the transfer link of the middle link is omitted, and production efficiency and production capacity are improved. Due to design of the hot cutting device, the hot cutting temperature is guaranteed, raw materials are tightly pressed, deformation and burrs are avoided, and full-automatic conveyance can be realized.

The invention relates to a box-type gas heat treatment furnace, which includes a furnace shell and a furnace. The furnace shell is a rectangular box-shaped body. The furnace shell is provided with a material inlet and a material outlet. There is a high-temperature flue gas inlet; the inside of the furnace shell is provided with an annular flue gas passage, the left and right sides of the flue gas passage are connected with the furnace, and the outside of the furnace shell is provided with a vertical flue connected with the flue gas passage; The material storage rack is placed under the high-temperature flue gas inlet and communicates with the flue gas passage, and the two ends of the material storage rack are respectively airtightly connected with the inner wall of the furnace shell. The present invention cancels a plurality of flue gas exhaust pipes provided on the traditional heat treatment furnace, directly adds a flue gas channel inside the furnace shell, and sets a vertical flue connected with the flue gas channel outside the furnace shell, so that the heat exchange in the furnace The final flue gas enters the flue gas channel and is output through the vertical flue, which simplifies the pipeline arrangement and reduces the production cost. The pressure of the flue gas circulation in the furnace is uniform, the heat utilization rate is high, and the heat loss is small.

The invention discloses a closed forging device for shaft products. The closed forging device comprises a feeding device, a first transferring manipulator, a forging and pressing device, a second transferring manipulator and a heat treatment device which are arranged in sequence. The forging and pressing device is provided with a closed forging mold. The closed forging mold comprises a lower moldbody and an upper mold body with a convex part at the lower end. The outer wall of the convex part is attached to the mold cavity of the lower mold body. The lower mold body is provided with an ejection rod. The first transferring manipulator and the second transferring manipulator are arranged on the base, rotatably connected with the base and separately connected with a rotation driving device.Shaft products are forged in a closed forging mode, so that flanges and leftovers are avoided, and the rejection rate is low; and integrated conveying, forging, pressing and heat treatment is achieved, so that production efficiency and product quality are improved; and materials are saved, and labor cost is reduced.

The invention provides a device for improving smoke discharge capability of a heat-accumulation-type stove kiln. The device is characterized in that a heat-accumulation-type nozzle brick is divided into an upper semi part, a lower semi part and an outer sleeve; the upper semi part and the lower semi part of the nozzle brick are fixed together through the outer sleeve, and are provided with unidirectional auxiliary channels with corresponding axes; the cross section of the channel at the upper semi part of the nozzle brick is elliptic; the cross section of the channel at the lower semi part of the nozzle brick is round; a spherical space is arranged at the joint part of the upper semi part and the lower semi part of the nozzle brick of the auxiliary channel, and occupies half of the upper semi part of the nozzle brick and half of the lower semi part of the nozzle brick; and a fire-resistant ball is put in the spherical space. According to the invention, under the condition that the invariable normal nozzle orifice area and flow rate of smoke are ensued, the smoke discharge area is increased, the smoke exhaust capability is improved, the smoke rate flowing through a heat accumulation chamber is increased, the stove pressure stability is ensured, and the recycling and utilization efficiency of smoke sensible heat is improved; and simultaneously the problem that electricity energy is wasted by adopting an ultra large draught fan is solved.

The invention discloses a heat accumulating type combustion control system and a control method. The heat accumulating type combustion control system comprises an upper industrial personal computer, a lower computer, a combustion fan regulating switch, a smoke exhaust fan regulating switch, a burner front valve, a sensor group and an igniter. Configuration software is installed in the upper industrial personal computer. The upper industrial personal computer is connected with the lower computer. The burner front valve comprises a burner front gas switch, a burner front combustion air switch and a burner front smoke exhaust switch. The lower computer is connected with the combustion fan regulating switch, the smoke exhaust fan regulating switch, the burner front valve, the sensor group and the igniter. The lower computer detects the working states of the sensor group and the igniter and transmits the working states to the upper computer; the upper computer conducts comprehensive processing according to the working states of the sensor group and the igniter and the configuration software and sends an instruction to the lower computer; the lower computer controls a heat accumulating combustor. The invention further discloses the control method of the combustion control system. The heat accumulating type combustion control system is uniform in exhaust gas temperature, good in temperature control accuracy and low in energy consumption.

The invention discloses an automatic intelligent double cross limiting range combustion control method for a heating furnace, and belongs to the technical field of heating furnace combustion control. By combining temperature self-learning, fuzzy control and PI parameter self-learning, the intelligent double cross limiting range control in the combustion process of the heating furnace is realized,the problem of control accuracy of the combustion of the heating furnace is effectively solved, and a hot rolling production requirement is well met. The method has the advantages that: gas and air flow rates are reasonably, accurately and quickly regulated and controlled, the regulating function of a regulating valve is effectively realized, and the temperature of a hearth of the heating furnaceis reasonably and accurately controlled.

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 relates to a recycling system of smoke gas energy for realizing high-temperature and low-oxygen combustion, belonging to the technical field of industrial furnaces. The system comprises a heating furnace, a continuous heat recovering apparatus, a chimney, a high-pressure blower, a coal gas compressor and a high-temperature and low-oxygen combustor; high-temperature smoke gas generated by the heating furnace firstly enters the continuous waste heat recovering apparatus deposited in the middle of a gas duct so that funnel temperature of the smoke gas is reduced to above dew point temperature via absorbing physical heat of the smoke gas, the smoke gas is discharged via the chimney; in the opposite direction of smoke gas flow, air and coal gas are pumped from the other end of the continuous heat recovering apparatus via the high-pressure positive blower and the coal gas compressor; the continuous residual heat recovering apparatus pre-heats the cold air and cold coal gas at 550 DEG C to 900 DEG C in contra-flow with the smoke gas. High-temperature air, high-temperature coal gas and partial smoke gas are organized to be combusted by the high-temperature and low-oxygen combustor, thereby realizing stable combustion in low-oxygen condition and reducing oxidation loss of iron works. The invention has the advantages of solving the problem of high energy consumption of industrial furnace, low yield and having obvious economic and social benefits.