14results about "Coke ovens heating" patented technology

The novel sludge carbonization device comprises a heating furnace, a heated furnace, an outer gear ring, a motor, a gear and an outer gear ring, the heated furnace comprises a heated furnace body, a mounting partition plate and a heated differential furnace tube, a heated cavity is formed in the heated differential furnace tube, and the outer gear ring is sleeved on the heated furnace body. A connecting shaft and a differential gear are arranged at one end of each heated differential furnace tube, and an inner gear ring meshed with all the differential gears is arranged on the heating furnace; according to the utility model, the heated furnace is formed by uniformly distributing the plurality of heated differential furnace tubes, and the heated gaps are arranged between the adjacent heated differential furnace tubes, so that the tube walls of all the heated differential furnace tubes can be heated in high-temperature smoke, the heated furnace rotates and heats in the heating furnace, and meanwhile, the heated differential furnace tubes realize differential rotation relative to the rotation speed of the heating furnace; when the heated differential furnace tube passes through the lowest position for direct heating every time, the heating positions are different, so that the whole heated differential furnace tube is uniformly heated, and the carbonization efficiency is improved.

The utility model discloses an oxygen content control device for a microwave cracking furnace, particularly relates to the technical field of microwave cracking furnaces, and comprises a microwave cracking furnace body, one side of the microwave cracking furnace body is fixedly communicated with an oxygen inlet pipe, the top of the microwave cracking furnace body is provided with a nitrogen release mechanism, and an oxygen control mechanism is arranged in the oxygen inlet pipe; the nitrogen release mechanism comprises a nitrogen tank which is installed on the top of the microwave cracking furnace body. According to the utility model, the nitrogen release mechanism and the oxygen control mechanism are arranged, the oxygen content is accurately controlled, and uniform injection and flow of nitrogen are beneficial to uniform transfer of heat, so that the temperature in the furnace is more uniform, and the safety problem caused by oxygen fluctuation is avoided; according to the method, the situation that due to excessive oxygen, materials are excessively oxidized, and the quality and the yield of cracking products are affected can be avoided, the situation that due to too little oxygen, the cracking reaction is affected can be prevented, and in the biomass cracking process, biochar, biogas and bio-oil products with higher quality can be obtained.

This process is for the sustainable production of pyrolysis oil containing liquid hydrocarbons from plastic materials, preferably waste materials. The process is characterized by the use of solar radiation to heat a heat transfer fluid (such as molten salt) at multiple temperature levels for use in a pyrolysis device requiring higher temperatures. The heat transfer fluid returning from the device is sent back to the respective solar radiant heater, thereby closing the loop. The process is therefore characterized by having at least two loops of heat transfer fluid. The plastic material enters a first pyrolysis reactor, heated at a moderate temperature by a first thermal fluid containing molten salt. The generated gas is then transferred to a second pyrolysis reactor, heated to a higher temperature by a second thermal fluid also containing molten salt. The unique setup of the process and associated plant, which synergistically exploits the special properties of the pyrolysis process and the solar collector, allows for high exergy efficiency. In particular, the present invention takes advantage of the fact that pyrolysis is carried out in two stages: the first stage requires a large amount of energy but at a moderate temperature. Only the second stage requires a high-temperature energy source, which requires a high concentration of solar energy; however, the pyrolysis process devised requires only a small amount of energy in this stage. This maximizes the yield of the process in terms of the resulting product (amount of pyrolysis oil per solar radiant power).

To provide a control apparatus and method using a pyrolysis raw material and product image information.SOLUTION: A pyrolysis reaction method comprises: a raw material input step of acquiring first data while inputting a raw material; a pyrolysis reaction step of moving the raw material while pyrolyzing the same; a reaction product discharge step of acquiring second data while discharging a pyrolysis reaction product; an image sample collection step of additionally securing the number of image samples of the first data and the second data; a DB storage step of normalizing the secured image samples into time-series data and storing RGB code values in a DB; a labeling step of assigning labels to the first data and the second data based on the stored DB values; a data processing step of generating third data as estimated moisture content and fourth data as estimated calorific value by utilizing the first data and the second data; and a control value derivation step of deriving control values for pyrolysis temperature and pyrolysis time required to ensure a calorific value-based quality of the pyrolyzed reaction product based on the third data and the fourth data.SELECTED DRAWING: Figure 1

The application discloses a biomass pyrolysis method and device driven by solar heat and photovoltaic green electricity, which comprises a solar light condensing unit, a spectrum separation unit is arranged on an exit path of the solar light condensing unit, and the spectrum separation unit separates light energy into a first wave band and a second wave band; a photoelectric conversion unit and a photo-thermal conversion unit are arranged on an output path of the spectrum separation unit; the photoelectric conversion unit converts the first wave band into electric energy output; the photo-thermal conversion unit converts the second wave band into thermal energy output; wherein the photo-thermal conversion unit and the photoelectric conversion unit cooperate to pyrolyze biomass materials; by separating solar radiation into short-wave light and long-wave light and guiding the short-wave light and the long-wave light to photovoltaic power generation and photo-thermal heating paths respectively, step-by-step efficient utilization of full spectrum of solar energy is realized, and the energy conversion efficiency of a unit area is greatly improved.

A process for producing pyrolysis oil containing liquid hydrocarbons from plastic materials, preferably waste materials. The process is characterized by the use of an energy source, preferably of an intermittent nature (and variable intensity), such as solar radiation. The plastic material enters a pyrolysis reactor heated by a molten salt thermal fluid. The molten salt is heated by the intermittent source to a temperature that is not fixed but varies within a predetermined range. In particular, when the available amount of the energy source is equal to or exceeds a predetermined maximum value, the temperature of the molten salt is increased to the upper limit of the range. Conversely, when the available amount of the energy source is equal to or lower than a predetermined minimum value, the temperature of the molten salt is decreased to the lower limit of the range. For intermediate availability values, the temperature can also be intermediate, for example, by following a linear profile. The pyrolysis temperature follows the temperature of the molten salt. On the other hand, the pyrolysis pressure is adjusted to be higher (at least 2.5 bara) for lower pyrolysis temperatures and lower (up to 2 bara) for higher pyrolysis temperatures. Surprisingly, it has been discovered that by operating in a specific manner, the quality of the resulting pyrolysis oil remains constant even when the pyrolysis temperature fluctuates widely.

The invention discloses a method and system for preparing furan compounds through continuous catalytic pyrolysis of biomass, and belongs to the field of chemical engineering. The system comprises a two-stage fixed bed reactor integrated microwave radiation device, a coupled catalyst cyclic regeneration device and the like, and SSZ-13 and SAPO series microporous zeolite catalysts which are prepared by microwave heating and multi-section temperature control technologies in combination with acid strength gradient configuration. The agricultural and forestry waste rich in cellulose and hemicellulose is converted into furan compounds such as furfural, 5-hydroxymethylfurfural and 5-methylfurfural within a short retention time. The process has the characteristics of high pyrolysis efficiency, good product selectivity, low environmental burden and suitability for continuous production, can realize recycling high-value conversion of agricultural and forestry wastes, and has remarkable industrialization potential and green chemical advantages.

The application discloses a low-temperature plasma reinforced coal fluidized bed hydrogenation pyrolysis device and method, and belongs to the field of coal pyrolysis technology. The low-temperature plasma reinforced coal fluidized bed hydrogenation pyrolysis device comprises a reaction tube body, a heating furnace, a product collecting device and a low-temperature plasma generator. The lower end of the reaction tube body is provided with a feeding port for hydrogen-rich gas carrying coal powder to enter. The lower end of the product collecting device is connected with the upper end of the reaction tube body in a butt joint mode, and the upper end of the product collecting device is provided with a discharging pipe. The low-temperature plasma generator can form a discharge area in the reaction tube body, and can activate part of the hydrogen-rich gas in the discharge area to generate low-temperature plasma. Free radicals in the low-temperature plasma can stabilize free radicals generated in the coal pyrolysis process. The application can effectively solve the problems of harsh activation conditions and high energy consumption of hydrogen-rich gas in the traditional hydrogenation pyrolysis, effectively reduce the generation of semi-coke, and improve the tar yield.

Process for producing a pyrolysis oil which comprises liquid hydrocarbons from plastic material, preferably waste material, sustainably. The process is characterized by the use of solar radiation which is used to heat a heat transfer fluid (like molten salts) at multiple temperature levels, so as to use the hotter heat transfer fluid to the pyrolysis devices that require higher temperature. The heat transfer fluid returning from said devices is sent back to the respective solar radiation heaters, thus closing the loops. The process is therefore characterized by having at least two loops of the heat transfer fluid. The plastic material enters a first pyrolysis reactor, heated with a first thermal fluid with molten salts at a moderate temperature, and the gases produced are brought into a second pyrolysis reactor also heated with a second thermal fluid with molten salts, to higher temperature. The particular setup of the process and of the relative plant, which synergistically exploits some specific characteristics of the pyrolysis process and of the solar collectors, allows to obtain a high exergetic efficiency. In particular, the fact that the pyrolysis according to the invention is carried out in two stages is exploited: in a first stage a high amount of energy is required, but at a moderate temperature. Only in the second stage is a high temperature energy source required, which requires a high concentration factor; however, due to the way the pyrolysis process was conceived, the amount of energy required at this stage is minor. This allows to maximize the yield of the process in terms of product obtained (quantity of pyrolysis oil per solar radiation power).

The invention provides a flexible chain type microwave pyrolysis device and a pyrolysis method. The flexible chain type microwave pyrolysis device comprises a closed shell, a chain type transmission mechanism, a flexible reaction net, a flexible scraping plate, a baffle, a heating plate and a microwave generator. The chain type transmission mechanism drives the flexible reaction net to annularly move, and raw materials directly fall on the reaction net to be heated and pyrolyzed without crushing pretreatment; a microwave generator heats the reaction area, and a heating plate and a wave-absorbing material on the surface of the flexible reaction net strengthen heat transfer; and the flexible scraping plate in the separation area strips residues through vibration scraping, and automatic residue discharging is achieved. The device can avoid bonding and blocking of raw materials, is efficient in heating, flexible in regulation and control, adaptive to various strip-shaped organic wastes such as waste paper strips and waste plastic lines, high in pyrolysis product quality, stable in operation and environment-friendly, and the treatment cost is remarkably reduced.

The invention relates to the technical field of coke oven discharging, in particular to a coke oven discharging structure with an in-oven temperature and pressure compensation function, which comprises a coke oven body and a discharging structure which is positioned on the coke oven body and is used for pushing out coke, compensating in-oven temperature by combining high-temperature flue gas and compensating in-oven pressure by extracting hot gas, and the discharging structure comprises an oven cover seat, a heating cavity and a heat storage cavity are formed in the furnace cover seat; according to the invention, waste heat of high-temperature flue gas produced normally by the coke oven is stored by the ceramic heat accumulator, no extra energy is needed after discharging, heat is released by the heat accumulator, and high-temperature gas is returned to supplement the oven temperature, so that extra consumption is avoided, the heat matching degree is high, and the influence of temperature drop on subsequent coking is reduced; and meanwhile, the furnace cover seat moves to drive the piston plate to pump high-temperature gas, the gas is returned through the one-way valve and the spring during resetting, and synchronous partial supplement of temperature and pressure is realized by matching with heat release of the heat accumulator, so that the temperature and pressure in the furnace are quickly recovered, and the coking efficiency is improved.

The invention relates to the technical field of energy utilization and biomass pyrolysis reactors, in particular to a biomass pyrolysis reaction device and method. The device comprises a biomass pyrolysis reactor and a circulating heat conduction assembly, and the biomass pyrolysis reactor and the circulating heat conduction assembly are connected through a heat supply pipe and a heat return pipe to form a heat supply circulating pipeline; the heat supply pipe is provided with a heat supply valve, and the heat return pipe is provided with a heat return valve for opening and closing a heat supply and heat return passage. The circulation heat conduction assembly comprises a heat supply box, a heat exchange box and heating equipment. The heat supply box and the heat exchange box are connected through a first guide pipe and a second guide pipe to form a heating circulation pipeline. The heating device is installed on the first guide pipe to heat the heat-conducting medium, the first guide pipe is provided with an air inlet for introducing inert gas and leading to the heat supply box, and the second guide pipe is provided with a heating circulating valve. The device further comprises a control system used for detecting the temperature of the heat supply circulation pipeline and the temperature of the heating circulation pipeline and regulating and controlling opening and closing of all the valves, switching of the two circulation pipelines is achieved, and therefore controllable switching of heat conduction medium preheating circulation and heat supply circulation is achieved.

Process for producing a pyrolysis oil comprising liquid hydrocarbons from plastic material, preferably waste material. The process is characterized by the use of an energy source preferably of an intermittent nature (and of variable intensity), such as for example solar radiation. The plastic material enters a pyrolysis reactor, heated with a molten salt thermal fluid. Said molten salts are heated by said intermittent source to a temperature that is not fixed but variable within a predetermined range. In particular, when the availability of the energy source is equal to or beyond a predetermined maximum value, the temperature of said molten salts is brought to the upper end of said range. Conversely, when the availability of the energy source is equal to or lower than a predetermined minimum value, the temperature of said molten salts is brought to the lower end of said range. For intermediate availability values, the temperature can also be brought to intermediate values, for example by following a linear profile. The pyrolysis temperature follows the temperature of the molten salts. The pyrolysis pressure, on the other hand, is modulated so that it is higher (at least 2.5 bara) when the pyrolysis temperature is lower and lower (no more than 2 bara) when the pyrolysis temperature is higher. Surprisingly, it has been discovered that by operating in the specified way, the quality of the pyrolysis oil obtained is kept constant, even for significant variations in the pyrolysis temperature.

The application discloses a production process of high-combustion-efficiency coke and belongs to the technical field of coking. The process comprises the following steps: S1, controlling the granularity and moisture of coal; S2, spraying preparation A containing an iron source, a calcium source and citric acid, and realizing anchoring of active components through low-temperature solidification; S3, coating preparation B containing micro SiO2 and a pore-forming agent, and constructing connected channels; S4, controlling the charging density; S5, adopting three-stage temperature rising coking of 350-450 DEG C, 450-600 DEG C and 950-1100 DEG C; and S6, immersing in slurry containing calcium carbonate and kaolin, and performing surface layer treatment. Through the anchoring catalysis of preparation A, the channel construction and skeleton maintenance of preparation B and the ash film inhibition of the surface layer slurry, and the coupling of the three-stage thermal system, the coke can keep low diffusion resistance and high reaction interface utilization rate in the whole combustion cycle, and high-combustion-efficiency is realized, that is, fast ignition, stable combustion and full burnout.