58results about How to "Solve slagging" patented technology

The invention discloses a biomass solid formed fuel anti-slagging additive and a preparation method thereof, which belongs to the technical field of renewable energy sources and is used for solving the problems that straw biomass solid formed fuel has high alkali metal content, is slagged in the combustion process and the like. The anti-slagging additive mainly comprises 15% to 25% of magnesium carbonate, 20% to 30% of alumina and 45% to 65% of the calcium carbonate, different formula ratio is made according to different biomass raw materials; and the anti-slagging additive is added into different biomass raw materials according to the proportion of 1% to 5%. The preparation method comprises the following steps: the calcium carbonate is firstly put into a special container, the container keeps dry, then alumina is added, finally the magnesium carbonate is added, the mixture is ground and evenly mixed for 10 to 15 minutes with the grinding particle size less than 1 mm, and then a finished product is obtained. The additive can solve the problem of slagging in the combustion process of the formed fuel and increases the combustion efficiency of the formed fuel.

The invention is high-efficiency and low-pollution biomass high-temperature combustion boiler and belongs to the boiler technical field. The invention comprises a biomass granule feeding device, a fuel even distribution plate, a cross flue tube, a radiate diversion block, an air nozzle in sections, a cyclone dust collector, a liquid drainage pool, a furnace, and a heat convection chamber. The invention is characterized in that a hopper of the biomass granule feeding device is arranged above the boiler for pre-drying; radiate diversion blocks are arranged in good order in the boiler; the pre-heated high-temperature is injected upwards into a hearth from the nozzle sections in a tangential direction to realize the staged and swirl combustion; the bottom is equipped with a gas, liquid and solid phase high-temperature cyclone segregator; the central high-temperature flue gas flows through a central flue tube to the upper cross flue tube and then enters the annular clearance between the furnace and the boiler wall and the hot convection chamber from below the boiler wall. The invention combines characteristics of biomass fuel and comprehensively absorbs the advantages of high-temperature air combustion, staged combustion, cyclone combustion, cyclone dust collection, liquid drainage, flue gas recirculation and other technologies, so the invention can realize the clean and high-efficiency use of the renewable energy of biomass.

The invention provides a device and a process for preparing natural gas by virtue of double-fluidization bed gasification of a biomass. The device comprises a burning carrier heating unit, a pyrolysis gasification unit, a biological carbon/carrier separation and conveying unit and a methane synthesis and tar returning unit, wherein the pyrolysis gasification unit is connected with the burning carrier heating unit, the biological carbon/carrier separation and conveying unit and the methane synthesis and tar returning unit. The other components are converted into methane gas as much as possible while the biological carbon is obtained, the content of methane in a pyrolysis product is about 10%, the pressure for subsequent synthesis is reduced, the tar in hydrolysis gas is used as a fuel for a double-fluidization bed, and the problems that combustion cannot be stabilized at a low temperature and alkali metals causes scorification in a high-temperature state when other double-fluidization beds adopt biological carbon combustion can be avoided to ensure that the temperature of a combustion furnace can be controlled very flexibly. The device and the process provided by the invention fully use different pyrolysis products of the biomass, can realize treatment of various biomasses, and are wide in raw material application range.

The invention discloses an automatic high-efficient biomass granular fuel combustor, which belongs to the technical field of renewable energy sources. The technical scheme comprises a slag-breaking and ash-removing mechanism (2) and a combustion liner (3), the slag-breaking and ash-removing mechanism (2) which is connected with a motor (9) via a movable port (14) is mounted in the combustion liner (3), and consists of a fuel-pushing screw (11), a combustion stirring screw (12) and an ash-slag discharge screw (13), and different air inlets are arranged at three positions on the cylinder of the combustion liner (3), which correspond to the slag-breaking and ash-removing mechanism (2). The combustor effectively avoids the slagging phenomenon in the process of granular fuel combustion, realizes the granule conveying, stirring, slag breaking, ash removing and the like, increases the combustion efficiency, and is applicable to different types of granular fuels such as crop straws and forestry residues, and the invention provides a guarantee for the promotion of the development of the biomass pellet fuel industry in China.

The invention provides a biomass-forming fuel solid-phase low-temperature gas-phase high-temperature combustion device and belongs to the technical field of biomass combustion. The biomass-forming fuel solid-phase low-temperature gas-phase high-temperature combustion device is characterized in that a feeding opening of a smoldering region (3) communicates with a discharging opening of a hearth (1), a discharging opening of the smoldering region (3) communicates with a cooling region (4), a furnace grate (13) is arranged on the lower portion of the hearth (1), a crushing mechanism (2) for crushing materials is arranged on the furnace grate (13), the furnace grate (13) is connected with a rotating mechanism for disturbing biomass fuel so that carbon powder can fall into the smoldering region (3) to be smoldered, meanwhile the block-shaped biomass fuel is made to move to the middle of the furnace grate (13), and the crushing mechanism (2) is used for crushing the block-shaped biomass fuel into the carbon powder and then enabling the carbon powder to fall into the smoldering region (3) to be smoldered. By the adoption of the biomass forming fuel solid-phase low-temperature gas-phase high-temperature combustion device, the problems of coking, slag bonding, the high gas-solid pollutant emission and invalid ash fertilizer existing in combustion equipment for agricultural waste such as straw are solved fundamentally.

The invention discloses a method for removing gas-phase potassium ions in biomass flue gas by utilizing ammonium phosphate. The method comprises the following steps of: adding quantitative ammonium phosphate additive onto a material layer of a fire grate of a boiler or into the hearth of the boiler by virtue of a spraying device in a biomass combustion device, and carrying out a reaction on the ammonium phosphate additive as well as gas-phase potassium chloride and potassium carbonate in the flue gas at a set temperature to generate potassium phosphate, so as to remove the gas-phase potassium ions in the biomass combustion flue gas. By adopting the method for removing gas-phase potassium ions in biomass flue gas by utilizing ammonium phosphate, potassium ions in the flue gas when biomass fuel combusts can be effectively removed, the problems that ash is deposited on a biomass boiler heating surface and the biomass boiler heating surface is slagged and corroded can be avoided, and removal of NOx can be promoted by amino groups produced when ammonium phosphate is heated and decomposed.

The invention discloses a high-temperature high-dust content high-corrosion waste heat boiler of metallurgical industry. A high-temperature platen superheater and a low-temperature platen superheater are arranged in a cooling room I and a cooling room II respectively; a convection evaporation tube platen I, a convection evaporation tube platen II and a convection evaporation tube platen III are arranged in a cooling room III, a cooling room IV and a cooling room V respectively; platen heating surfaces are longitudinally arranged in the cooling rooms; a high-temperature radiation settling room and each cooling room are formed by membrane walls and communicated in a staggered manner; an ash bucket is arranged at the lower part of each heating surface; the collected dust is conveyed out of the boiler by a slag extractor. The high-dust content high-temperature flue gas generated in a metallurgical production process sequentially enters the high-temperature radiation settling room, multi-level cooling rooms and an economizer to realize heat energy recovery of a convection bank; the superheated steam generated by the waste heat boiler is applied to enterprise production. The waste heat boiler disclosed by the invention has the advantages of simple production technology, convenience in maintenance and safe and stable operation and is suitable for popularization and application in the waste heat recovery of high-dust content high-temperature flue gas in the metallurgical and chemical industries.

The invention provides a replacement-free plate rib type steel plate flame cutting platform. The platform comprises a ground platform support frame; transverse steel plates and vertical steel plates are mounted on the ground platform support frame; multiple first clamping grooves are arranged on the vertical steel plates at equal intervals; transverse steel plates are arranged in the first clamping grooves, so that the transverse steel plates and the vertical steel plates form a latticed structure; multiple second clamping grooves are formed in the transverse steel plates; support pieces are mounted in the second clamping grooves, are cylinders with cones at the tops, and are clamped in the second clamping grooves through through grooves; the support pieces are arranged on the transverse steel plates in a lattice manner to form support planes; and the top ends of all the support pieces are positioned on the same horizontal plane. The platform is simple in structure, can use specificity of the support pieces for solving such problems as damage, lagging and tumor hanging in the steel plate cutting process of factories, reduces the replacement frequency of the support plates of the cutting platform, prolongs the service life of a cutting machine, and improves the production safety.

The embodiment of the invention discloses a stove capable of preventing slagging. The stove comprises a combustion chamber in which an ignition rod is arranged, a slag-out rod connected with a feed rod and is positioned in the combustion chamber, a hearth which is arranged on the top of the combustion chamber and is communicated with the combustion chamber, a hopper of which the bottom is provided with an emptying port communicated with a feed pipe, and an air distribution chamber communicated with an air inlet of the combustion chamber; the feed pipe is connected with the feed port of the combustion chamber; the feed rod is arranged in the feed pipe and is provided with a feed spiral sheet; a slag-out spiral sheet is arranged on the end of the slag-out rod far away from the feed rod, and a plurality of slag crushing nails are arranged at one end of the slag-out rod close to the feed rod; and the external wall of the emptying port is provided with a feed motor and the output end of the feed motor is connected with the feed rod. The stove capable of preventing slagging, which is provided by the embodiment of the invention, solves the slagging problem of the stove in the combustion process.

The invention relates to the technical field of chemical equipment, in particular to a gas distributor and a gasification furnace. The gas distributor can distribute part of airflow passing through horizontal openings along a vertical direction as required, so that the distribution of a flow field can be optimized, a flow dead zone caused by uneven distribution of the flow field can be avoided, smooth slag discharge can be realized, and the operation and maintenance cost of the gasification furnace can be reduced. The embodiment of the invention provides a gas distributor, which comprises a conical distribution plate with a slag discharge port at the bottom; the conical distribution plate is provided with a plurality of horizontal openings penetrating through inner and outer annular surfaces; the horizontal openings of the conical distribution plate corresponding to a first fluidization area are positioned on the inner side of the conical distribution plate and are connected with a gasdistribution structure respectively; and the gas distribution structure is used for re-distributing the air flow introduced into the horizontal openings of the conical distribution plate corresponding to the first fluidization area, so that the air flow passing through the horizontal openings of the conical distribution plate corresponding to the first fluidization area is uniformly dispersed ina vertical direction. The gas distributor provided by the embodiment of the invention is used for distributing gas in the gasification furnace.

The invention discloses a preparation method and application of a composite metal oxide catalyst for coal gasification. According to the preparation method, lanthanum nitrate, nitrate metal salt A, ferric nitrate and nitrate metal salt B are added into water and mixed evenly to prepare a metal nitrate solution; then EDTA (ethylene diamine tetraacetic acid) and citric acid are mixed evenly, the pHvalue is adjusted to 7-9, and the mixture is stirred evenly in a constant temperature water bath to prepare a precursor solution; the metal nitrate solution is added to the precursor solution, and stirring is performed until a wet gel is formed; and the composite metal oxide catalyst is obtained by drying, calcining and cooling. The composite metal oxide catalyst for coal gasification can not onlyeffectively increase the gasification rate of coal, with the conversion rate reaching 90%; but also maintain the original structure and catalytic activity after the reaction, so that reutilization can be achieved through recycling.

The present invention relates to the technical field of combustion equipment, in particular to a biomass particle combustion furnace. A combustion chamber is internally provided with two fire grates,and rotating shafts of the two fire grates respectively extend out of a furnace body and are connected with a fire grate transmission mechanism. An ash clearing auger is arranged in an ash falling bin, and one end of an auger shaft of the ash clearing auger extends out of the furnace body and is connected with an ash clearing transmission mechanism. An ash outlet of the ash clearing auger is arranged on the other side away from the furnace body and a feeding device. A storage bin of the feeding device is arranged at the side upper part of the combustion bin, and the storage bin is arranged above an upper feeding auger. The discharge end of a lower feeding auger is arranged at the side upper part of the combustion bin in the furnace body, and the upper feeding auger and the lower feeding auger are connected with a feeding transmission mechanism. The grate rotating with fixed axis realizes dynamic combustion and solves the slagging problem. The ash removal auger and the synchronous transmission mechanism for feeding and ash removal can solve the problem that accumulated ash cannot be cleaned in time.

The invention belongs to the technical field of biomass application and particularly relates to a parallel mixed combustion system and method. The parallel mixed combustion system is composed of a biomass direct-fired boiler and a pulverized coal fired boiler, wherein biomass fuel in a storage bin enters the biomass direct-fired boiler through a conveying device and combusts on a fire grate to generate heat which is exchanged with heat of a superheater, and the generated low-parameter steam is conveyed to an inlet of a low-temperature reheater of the pulverized coal fired boiler through a steam conveying device; and smoke of the biomass direct-fired boiler is conveyed to the front side of an induced draft fan of the pulverized coal fired boiler after passing through a coal economizer, an air preheater and a dust collector, is introduced to a chimney and is discharged into the atmosphere. According to the parallel mixed combustion system, a biomass combustion system is completely separated from a coal combustion system, and the low-parameter steam generated by the biomass direct-fired boiler is conveyed to the coal fired boiler, so that parameters and the overall conversion efficiency are increased.

The invention discloses a primary air opposite-flushing device for preventing a boiler rear wall water cooling wall from slagging and corroding. The device comprises primary air opposite-flushing nozzles arranged on a rear wall of a boiler in a layered manner, and the primary air opposite-flushing nozzles and turbulent combustors arranged on a front wall of the boiler in a layered manner are arranged in a one-to-one opposite manner. The primary air opposite-flushing nozzles and primary air pipes of the turbulent combustors are positioned on the same central axis; and the primary air opposite-flushing nozzles are connected with an opposite-flushing air mother pipe through pipelines with valves. On one hand, the rear wall water cooling wall can be prevented from being scoured by pulverized coal, the problems of slagging and high-temperature corrosion are solved, the primary air speed and the secondary air rotational flow strength of the turbulent combustors on the front wall can be flexibly adjusted by combining the unit load and the fire coal quality, and the adherence atmosphere of the rear wall water cooling wall does not need to be considered; and on the other hand, under the condition that the amount of air entering a hearth is certain, part of air enters the hearth through the primary air opposite-flushing nozzles of the rear wall, the air staged combustion effect can be achieved, and NOx generated by combustion is reduced.

The invention relates to a vent plug for ventilation and stirring of the bottom of a smelting furnace. The vent plug is installed on the bottom of a furnace body of the smelting furnace and comprisesa ventilating core which is made of a high-temperature resisting material and is internally provided with air holes, the lower end face of the ventilating core is provided with a groove, and the groove is internally provided with an insertion hole. One end of a high-temperature resisting seamless pipe is provided with a first end expanding disk, the end portion of the high-temperature resisting seamless pipe is inserted into the insertion hole of the ventilating core, and the first expanding disk is located in the groove. A first refractory castable cured structural body is formed by curing high-strength refractory castable filled in the groove. A second refractory castable cured structural body is formed by curing high-strength refractor castable wrapping the ventilating core, the first refractory castable cured structural body and the outer surface of high-temperature resisting seamless pipe. The invention further relates to the metal smelting furnace comprising the vent plug. The vent plug is provided with multiple structures preventing the ventilating core from disengaging and multiple sealing structures and can reinforce the fixation of the ventilating core and the high-temperature resisting seamless pipe, and the service life of the whole furnace body is prolonged.

The invention discloses a composite biomass gasification furnace, which mainly comprises a gasification reaction chamber and a carbon layer gasification chamber for high-temperature reaction to generate fuel gas to form a composite gas. A biomass fuel is firstly subjected to a high-temperature cracking gasification reaction in the gasification reaction chamber to generate the fuel gas, the biomassfuel which is not completely reacted in the gasification reaction chamber is converted into biomass carbon which falls into the carbon layer gasification chamber, and then the high-temperature biomass carbon is subjected to an oxidation reduction reaction with incoming air below and water vapor generated by high temperature in a sealed water tank to generate carbon monoxide and hydrogen, so thatthe biomass fuel is converted into the fuel gas as much as possible. The composite biomass gasification furnace is characterized in that the structure is scientific, ingenious and compact, and a feedhopper with a double-layer structure can prevent the fuel gas from escaping during feeding. A hopper-cone-shaped material pulling disc prevents bridging and arching of a stock bin; a air supply pipe serves as a middle air inlet channel, and air inletting is more uniform without dead angles; a sealed water tank can prevent the fuel gas from leaking during ash discharge; and a slag breaking fire grate is extruded to break coking blocks formed by biomass ash at high temperature.

The invention provides a process method for cooperatively treating hazardous waste through rotary kiln incineration and oxygen-enriched side-blown reduction smelting. The process method comprises the following steps that firstly, the hazardous waste is conveyed into a rotary kiln to be incinerated to obtain rotary kiln incineration hot slag; and then the rotary kiln incineration hot slag obtained in the previous step, a reducing agent and a flux are fed into a side-blown converter and then are subjected to reduction smelting to obtain matte alloy and solid waste. The process method for cooperatively treating the hazardous wastes through rotary kiln incineration and side-blown converter reduction smelting and a corresponding process device are provided, so that resource recycling of wastes of hazardous waste treatment and reduction and harmlessness of waste emission are realized, the advantages of being low in investment, energy-saving, consumption-reducing, low in operation cost, easy to popularize and the like are achieved, and reduction, harmlessness and resource recycling in a real sense are realized.

The invention discloses a fuel dealkalization device and a method and a circulating fluidized bed gasification device and a method thereof, and the fuel dealkalization device is a bubbling fluidized bed and comprises a fuel inlet which is located at the upper part of the fuel dealkalization device and is used for conveying fuel to the fuel dealkalization device; an auxiliary gasifying agent inlet positioned at the lower part of the fuel dealkalization device and used for conveying an auxiliary gasifying agent to the fuel dealkalization device, wherein the fuel and the auxiliary gasifying agent are subjected to dealkalization reaction under heating; a dealkalized solid fuel overflow port positioned at the upper part of the fuel dealkalization device and used for outputting the dealkalized solid fuel generated by the dealkalization reaction; and an alkali-rich fuel gas outlet is positioned at the upper part of the fuel dealkalization device and used for outputting alkali-rich fuel gas generated by the dealkalization reaction. The invention further provides the fuel dealkalization method and the circulating fluidized bed gasification device and the method thereof. The method solves the technical problem of slag bonding caused by high alkali metal content of the high-alkali coal, realizes safe and reliable utilization of the high-alkali coal, and has a wide market application prospect.

The invention provides a downlink high-temperature gasified product chilling device which comprises a gasifying section, a chilling section and a cooler section. The gasifying section is used for generating a gasified product. The chilling section is used for chilling the gasified product generated by the gasifying section to enable the gasified product to be cured fast and lose cohesiveness. The cooler section is used for further cooling the product chilled by the chilling section and recovering waste heat. High-temperature synthesis gas with molten ash is chilled by low-temperature chilling gas nearby an outlet of a gasifying furnace, the temperature falls abruptly below an ash fusion point, the surface of slag is cured instantly, the slag is gathered to a center area to descend under carrying of chilling gas flow, the ash is prevented from falling into a synthesis gas cooler in a slag form to the maximum, and the situation that ash particles make contact with the water cooling wall face of the synthesis gas cooler and cause contamination is effectively prevented. Water vapor is adopted as the chilling gas, the shift reaction can be promoted, the volume fraction of H2 in the synthesis gas is greatly increased, and loads and shift cost of a follow-up shift system are greatly reduced. The system is easy to operate and has a large-scale application and popularization prospect.