202results about How to "Improve carbonization efficiency" patented technology

The invention discloses a continuous biomass low-temperature pyrolytic charring method and a charring furnace thereof, belonging to the fields of biomass charring and biomass energy source utilization. The furnace body of the charring furnace adopts a screw propelling feed mode, and the power is derived from the drive of a motor; an external heating cylinder is sheathed outside an internal heating cylinder of the furnace body, the internal cylinder and the external cylinder are spaced, and the internal flue inside the sleeve has a labyrinth path to ensure heat supply from hot flue gas to pyrolytic reaction to uniformly heat a biomass raw material; and during charring, the generated flue gas supplies heat to a reaction cylinder after combustion in a combustion chamber, and the hot flue gas enters a heat exchanger device to dry the raw material after flowing through the sleeve. Through screw propelling, the method disclosed by the invention realizes continuous low-temperature pyrolytic charring reaction, and realizes accuracy control of the retention time of the biomass inside the charring furnace; and the furnace body adopts a sleeve structure, which fully utilizes the afterheat of the charring flue gas, and the reaction cylinder adopts interior heating and outer wall heating together, which enhances the uniformity characteristic of the temperature inside the reaction cylinder and prolongs the service life of an auger shaft.

The invention discloses an in-situ carbonization curing treatment method for a shallow soft ground, and belongs to the field of civil engineering ground stabilization. The method includes the steps that pretreated ground soil is broken and stirred through a crawler-type stirrer; a first curing agent and a second curing agent are mixed, the mixed curing agents are sprayed into the ground soil, and the mixed curing agents and the ground soil are evenly stirred; U-type drain boards are inserted at intervals through a board inserting device; a compacting device and a film laying device are started, and films are laid while the treated ground soil is rolled; carbon dioxide gas is injected to carry out ventilating carbonization on the compacted ground soil; the steps are repeated, and the steps of mixing the curing agents for the pretreated ground soil, inserting the drain boards, and compacting, sealing and stabilizing the treated ground soil in a carbonization mode are completed continuously. The treatment system and method are simple and reliable and capable of adapting to a complex environment, construction is safe and efficient, and quantification of the curing agents in ground treatment and resource utilization of carbon dioxide are achieved.

The present invention discloses process and apparatus for preparing pre-nucleated nano calcium carbonate. The process includes the following steps: calcining limestone to generate CaO, and slaking to form Ca(OH)2 solution; pumping Ca(OH)2 slurry into pre-nucleating reactor to generate great amount of crystal nuclei; leading the crystal nuclei into sealed carbonizing reactor and introducing CO2 to produce nano calcium carbonate slurry; filtering, and drying to for pre-nucleated nano calcium carbonate. The special apparatus is the pre-nucleating reactor, which is cylindrical and has partition board to separate into upper and lower layers and spherical porous stuffing in the upper layer. The pre-nucleating technology results in greatly raised carbonizing efficiency and makes it possible to obtain nanometer calcium carbonate crystal with small particle size and narrow size distribution.

The invention discloses a magnesite carbonization method for producing magnesium hydroxide and a calcium carbonate product, and belongs to the technical field of inorganic chemical industry. The method comprises the following steps of: calcining and grinding magnesite, mixing with water, adding CaCl2 into pulp, introducing CO2 gas, and stirring and filtering to obtain a primary filter cake and primary filtrate; adding alkali into the filtrate, and stirring and filtering to obtain a secondary filter cake and secondary filtrate; performing spray drying on the secondary filter cake to obtain Mg(OH)2; drying the secondary filtrate to obtain NaCl; adding water into the primary filter cake, introducing CO2 gas, and stirring and filtering to obtain a third filter cake and third filtrate; performing spray drying on the third filtrate to obtain CaCO3; and filtering and drying the third filter cake to obtain a product serving as a raw material for producing glass for subsequent treatment. The CaCl2 is added in the carbonization reaction process, the carbonization efficiency is improved, high-purity magnesium hydroxide and calcium carbonate products are prepared, other useful components serve as raw materials for producing glass and is subsequently treated and utilized, the production process flow is simple, the equipment requirement is low, and after the treatment, other pollution is not generated.

The invention provides a titanium carbide preparation method based on carbonization titanium extraction treatment of titanium-bearing blast furnace slag. The method comprises the steps that the titanium-bearing blast furnace slag serves as the raw material, grinding and balling are conducted, heating is conducted to 1,100 DEG C to 1,300 DEG C, methane is decomposed into hydrogen and carbon black, and a titanium carbide crude product is obtained after reduction and carbonization are conducted; the titanium carbide crude product is subjected to levigating treatment and purifying, and a more pure titanium carbide product can be obtained; the processes of the method are simple and easy to operate, due to the fact that methane is decomposed to obtain hydrogen and carbon black with high activity, hydrogen and the titanium-bearing blast furnace slag are subjected to a gas-solid reaction, and the reduction efficiency is high; meanwhile, by means of the carbon black with the high activity, the carbonization efficiency is greatly improved, the overall reaction efficiency is improved, the carbonization temperature is decreased, tail gas obtained from the reaction is used as gas fuel supply for heating of a closed-type carbide furnace, therefore, energy consumption is effectively reduced, an existing titanium-bearing blast furnace slag resource is better utilized, the added value of the titanium-bearing blast furnace slag is increased, and good industrial application value is achieved.

Provided is a carbonizing furnace capable of improving combustion efficiency of combustible gas generated by combustion of organic waste and of improving carbonization efficiency of organic waste by appropriately controlling the temperature of carbide. Provided is a pyrolytic furnace in which heating gas can be suppressed from outflowing to the outside from a gap between the upper surface of the body part of the pyrolytic furnace and the outer circumferential surface of a reaction tube where a pyrolysis reaction between carbide and a gasification agent is caused, and in which the temperature of a region where the pyrolysis reaction is caused can be suppressed from being reduced. Provided is a water gas generation system which improves thermal efficiency without using a dedicated heat source for generating water steam to be used as a gasification agent for carbide, promotes a pyrolysis reaction, and thereby, achieves the excellent heat efficiency. Provided are a hydrogen gas generation system and a power generation system which use water gas generated by a water gas generation system including a carbonizing furnace and a pyrolytic furnace and which have excellent productivity. Provided is a carbonizing furnace which improves combustion efficiency by controlling the supply amount of air being supplied to the carbonizing furnace according to the temperature of combustion gas in the carbonizing furnace, and which improves carbonization efficiency by controlling the discharge amount of carbide to be discharged to the outside according to the temperature of carbide or the deposit amount of organic waste in the carbonizing furnace, to make the temperature of carbide appropriate, and by controlling the temperature of air being supplied to the carbonizing furnace. In addition, provided is a pyrolytic furnace which blocks outflow of heating gas or water gas by providing seal portions at the attachment positions of a body part, a reaction tube, and a water gas outlet part, etc. of the pyrolytic furnace, and which maintains a pyrolysis reaction temperature by providing a pyrolysis promoting mechanism to the reaction tube. Provided is a water gas generation system which has excellent thermal efficiency and in which a combustion gas flow path is formed so as to allow combustion gas generated by a carbonizing furnace to flow through a carbonizing furnace, a pyrolytic furnace, a steam superheater, a steam generator, a dryer, and the like. Provided is a hydrogen gas generation system or a power generation system formed by combining the water gas generation system with a hydrogen purifying apparatus or a power generation equipment.

The invention discloses a carbonizing device for solid waste recycled aggregates for concrete. The device comprises a loading bin, a drum type carbonizing bin and a storage bin, wherein the loading bin and the storage bin are arranged on two ends of the drum type carbonizing bin in a sealing way; a circumferential rack is arranged on an outer surface of the drum type carbonizing bin, and is meshedwith a fixed motor transmission gear. A double-spiral turnover plate is arranged on an inner cylinder wall of the drum type carbonizing bin. The loading bin is provided with a carbon dioxide air inlet, and a feed hopper is arranged on the end part; a discharging leakage pipe is arranged on the bottom part of the storage bin. The feed hopper is sealed by a valve closed by automatic rebound, and adischarge hole is sealed by a water tank. The carbonizing device not only realizes continuous production of recycled aggregates carbonizing, but also realizes full seal of a carbonizing space, guarantees that no CO2 gas is lost during a carbonizing process, and provides a way for industrial production of solid waste recycled aggregates carbonizing. Meanwhile, according to the carbonizing device, the recycled aggregates can fully absorb the CO2 gas, and the mechanical strength of the recycled aggregates is greatly improved.

The invention discloses a method for preparing flower-sphere-shaped light calcium carbonate by using ultra-fine ground heavy calcium carbonate as a seed crystal. The method comprises the following steps: adding the ultra-fine ground heavy calcium carbonate used as the seed crystal into calcium hydroxide concentrate slurry, performing mixing, introducing carbon dioxide, and performing a carbonization reaction to obtain the flower-sphere-shaped light calcium carbonate, wherein an addition amount of the ultra-fine ground heavy calcium carbonate is 0.5-2% of a mass of the flower-sphere-shaped light calcium carbonate. According to the method provided by the invention, the flower-sphere-shaped light calcium carbonate prepared by the method is grown and arranged in a radioactive spherical shape by using the ultra-fine ground heavy calcium carbonate seed crystal as a core, the structure makes the flower-sphere-shaped light calcium carbonate have high light scattering ability, and paper whiteness and opacity can be significantly improved; and in addition, due to the induction action of the seed crystal, the efficiency of carbonization is improved, covering of un-reacted calcium hydroxide isreduced, so that the flower-sphere-shaped light calcium carbonate has extremely-narrow particle size distribution, and the spherical particles give good rheological properties to the slurry.

The invention belongs to the technical field of activated carbon manufacturing and relates to a regeneration system and preparation method for waste activated carbon, especially to a regeneration system and regeneration method for waste activated carbon. The regeneration system for waste activated carbon comprises a waste activated carbon treatment unit, a mixing and granulating unit, a drying andcarbonizing unit and a finished product cooling unit which are mounted in sequence, wherein the waste activated carbon treatment unit is used for introducing waste activated carbon and screening, mixing, neutralizing and washing the waste activated carbon; an adhesive is added into a washed secondary raw material through the mixing and granulating unit, and extrusion is conducted to form semi-finished particles, and if a fed material is granular activated carbon, treatment via the mixing and granulating unit is not needed; the particles are subjected to drying, carbonizing and activating through the drying and carbonizing unit so as to form a high-temperature finished product; and the high-temperature finished product is cooled by the finished product cooling unit to form a finished product.

The invention relates to a preparation method of an activated coke for water treatment, which comprises the following steps of: firstly, crushing coal materials until reaching proper particle diameters; then drying and dehydrating the crushed coal materials; then carrying out carbonizing treatment on a dried and dehydrated product in stages to obtain a carbonizing product, wherein the temperature in the first stage is 400-450 DEG C and the residence time is for 60-120min, the temperature in the second stage is 600-650 DEG C and the residence time is for 60-120min; and finally, carrying out activating treatment on the carbonizing product through an activating agent, and then reducing temperature to obtain the activated coke. The invention solves the technical problems that the volatilization of substances in the carbonizing product is not adequate and the large and medium pores can not be formed because the one-off carbonizing mode is utilized for the activated coke produced in the prior art, and the activated coke is not suitable for water treatment, reduces the production cost, and is a preparation method of the activated coke with excellent water treatment property for water treatment by using brown coal as the raw materials.

The invention discloses a carbonization reaction device and a carbonization reaction method for nano calcium carbonate production. The carbonization reaction device comprises a Ca(OH)2 slurry feeding tube, a carbonization tower, a stirrer, an annular gas-liquid distributor, a CO2 gas inlet tube and an emulsion dispersing machine. The carbonization reaction method comprises the following steps: (1) feeding Ca(OH)2 slurry into a reflux area of the carbonization tower; (2) continuously feeding the Ca(IH)2 slurry into the emulsion dispersing machine to mix and react with a CO2 gas, and feeding the obtained product into the reaction area of the carbonization tower; (3) continuously circulating the mixed slurry between the carbonization tower and the emulsion dispersing machine for carbonization and emulsion dispersion; (4) adding a dispersing agent, continuously circulating the mixed slurry between the carbonization tower and the emulsion dispersing machine for secondary carbonization and emulsion dispersion; and (5) stopping introduction of CO2 for reaction and operation of the emulsion dispersing machine, thereby obtaining prepared nano calcium carbonate slurry. The carbonization reaction device and the carbonization reaction method for nano calcium carbonate production are rapid in carbonization reaction speed, high efficiency, good effect, small investment and low cost.

The invention discloses a biomass pyrolytic carbonization system feeding device. The device comprises a raw material storage bin, a crushing device, an impurity removal device, a drying device and a PLC control system; the crushing device is arranged below the raw material storage bin; the impurity removal device is connected with the crushing device through a conveyor belt; the drying device is arranged below the impurity removal device; the crushing device comprises a crusher and a storage device; the storage device is arranged below the crusher; a collecting device is arranged below a vibration screen; the side of the vibration screen is provided with a conveying channel connected with the drying device; the drying device is connected with a carbonization machine through a transmission device; and the PLC control system is connected with the impurity removal device, the drying device and the transmission device. The feeding device provided by the invention is capable of improving product purity, reducing production time and improving production efficiency.

The invention relates to a system for comprehensively utilizing vanadium-titanium-magnetite to prepare titanium carbide, wherein the system includes a gas-based shaft furnace, a melting separator and a separation and purification system, and the gas-based shaft furnace includes an inlet of vanadium-titanium-magnetite oxidation pellets , reducing gas inlet and vanadium-titanium ore sponge iron outlet, melting separator includes vanadium-titanium ore sponge iron inlet, hydrogen inlet, tail gas outlet, vanadium-containing molten iron outlet and titanium carbide-rich slag outlet, and the separation and purification system includes titanium carbide-rich slag inlet And the titanium carbide outlet, the vanadium-titanium ore sponge iron outlet of the gas-based shaft furnace is connected to the vanadium-titanium ore sponge iron inlet of the melter, the tail gas outlet of the melter is connected to the reducing gas inlet of the gas-based shaft furnace, and the carbonization of the melter The titanium carbide slag outlet is connected to the titanium carbide-rich slag inlet of the separation and purification system. The invention also relates to a method of producing titanium carbide using the system. The system adopts the short-process smelting process of vanadium-titanium magnetite gas-based direct reduction-melting separation, which can make full use of TiO2 in the slag, and the obtained products have high value and are environmentally friendly.

The invention relates to a device and a method for carbonizing straw. The device comprises a tunnel kiln type carbonizing furnace body, a heating unit, a smoke dust collecting treatment unit, sintering material boxes and a rail type material carrying cart, wherein the sintering material boxes are arranged in the rail type material carrying cart; the heating unit comprises flame guns, a gas pipeline and a combustion-supporting gas pipeline which are arranged in a hearth; straw devices are arranged in the sintering material boxes in the material carrying cart and are moved to the carbonizing furnace body; after the carbonizing furnace body is closed, gas and combustion-supporting gas are supplied to the flame guns by the gas pipeline and the combustion-supporting gas pipeline in the heating unit, and the flame guns spray flame to heat the hearth; and after the temperature of the hearth is raised to 480 to 550 DEG C and is kept for 5 to 8 hours, the hearth is cooled. According to the carbonizing device, biological straw resources are utilized, and the carbonizing device has the advantages of high carbonizing ratio, low carbon discharge amount, full utilization of resources, high carbonizing efficiency, low energy consumption and the like; and the method for carbonizing the straw is simple in process and environment-friendly and is suitable for large-scale production.

The present invention provides one kind one continuous carbonizing method and apparatus. The method can treat great amount of matter without generating offensive odor, and has raised carbonizing efficiency, reduced fuel consumption and lowered cost. The continuous carbonizing apparatus includes long horizontal tunnel kiln comprising preparing zone, pre-heating zone, carbonizing zone, cooling zone and conveying zone successively; and re-burning deodorizing furnace performing heat treatment to gas exhausted from the tunnel kiln. The full carbonizing process from loading the matter to be carbonized into the storing boxes to discharging the carbonized matter is completed in the tunnel kiln.