83results about How to "Increase cycle ratio" patented technology

A high-density pressurized fluid bed coal gasification device and a method relate to a gasification device and a method which are especially suitable for the efficient treatment of the high-sulfur, high-ash and high ash fusion point coal with high reserve volume in China and have the advantages of broad coal type adaptability, high carbon transformation ratio in the gasification process, high heat value of coal gas, low investment and excellent environment-friendly performance. A gasification reactor (1) is arranged in a pressure shell (2) and is divided into a dense-phase turbulent flow fluidizing section (9), a high-density core-annulus flow section (10) and a density rapid flow section (11) from bottom to top, and according to the gasification character of the goal with high sulfur, high ash and high ash fusion point, flow states with different features are adopted for pressurizing and sectionalized gasification from bottom to top and the pressure for gasification is 1.0-2.5MPa.

A pulverized coal pressure dense transport bed gasification method and installation of the invention relates to gasification technology and employs in-furnace desulfurization craft. Pulverized coal and desulfurizer are sent into gasification furnace through the middle and lower part of gasification furnace by a feeder, and then react with a gasifying agent. Reaction mass flow upward from the bottom of the gasification furnace, and enter into a multistage gas-solid separator from an export on the top of the gasification furnace. Most solids are separated in the gas-solid separator and enter into the low part of the gasification furnace by a high flux return feeder to continue to participate in reaction. Gas products with a small amount of solid enter into a gas cooler which can recover gas manifested heat to generate steam. The enter modes of the gasifying agent are bottom once wind and cyclone twice wind, otherwise, the reactor can also be use to burn. Because of the high-rate cycle, high solid content and high gas-solid mixing in the gasification furnace of the invention, the gasification strength and gasification rate of the gasification furnace can be improved and higher gasification efficiency and carbon conversion rate can be obtained.

The invention discloses a low-nitrogen combustion technique based on circulating fluidized bed boiler. The circulating fluidized bed boiler comprises a boiler body, a cyclone separator, a deduster, an induced draft fan, a primary air supply system and a secondary air supply system which are connected in sequence. A smoke recirculation pipe is drawn out behind the induced draft fan. The primary air supply system and the secondary air supply system are connected to the smoke recirculation pipe in parallel. A burn-out chamber is arranged at an outlet of the cyclone separator. The low-nitrogen combustion technique based on the circulating fluidized bed boiler comprises the following steps that pulverized coal enters the boiler body under the action of primary air, specifically, the amount of smoke recirculation air in the primary air accounts for 8-10% the total air amount of the primary amount, and the amount of the primary air accounts for 40-45% of the total air amount; secondary air is introduced into the boiler body through the secondary air supply system, specifically, the amount of smoke recirculation air in the secondary air accounts for 12-14% the total air amount of the secondary air; fine flying ash enters the burn-out chamber; and over fire air is introduced into the burn-out chamber. According to the low-nitrogen combustion technique based on the circulating fluidized bed boiler, the burn-out chamber is arranged at the outlet of the separator, and part of smoke is mixed into the primary air and the secondary air, so that generation of NOx is reduced.

The invention relates to an apparatus for converting a tar component and carbonaceous particles in raw gas, and a method thereof. The conversion apparatus comprises a conversion system, a material return system and a material sealing system. The conversion system is mainly composed of a solid particle distribution zone, a partial oxidation zone and an advanced treatment zone. The material return system is composed of a gas-solid shunting device, a solid particle trapping device and a vertical dipleg. The material sealing system is composed of a seal level control device, an annular seal and a material return inclined tube. A partial oxidation reduction reaction of a gasification agent, and the tar component and carbonaceous particles carried in the raw gas is carried out to convert the tar component and the carbonaceous particles into gas, so the advanced conversion treatment of the tar component and the carbonaceous particles in the raw gas is realized, and the energy conversion efficiency is greatly improved. The apparatus and the method have the technical advantages of simple operation process, low apparatus investment and running cost, high conversion rate and the like.

The present invention discloses a method for controlling water eutrophication of the 'artificial lagoon' of the Jinshan city beach, which comprises the following steps: firstly, according to the theory of trophodynamics, aquatic organisms are put into the water of the 'artificial lagoon'of the Jinshan city beach so as to adjust and control the aquatic ecosystem structure, and alga, polychetes, conches, shrimps, crabs and fishes are put into the water sequentially; and secondly, the water quality is detected and the aquatic ecology effect is evaluated. The method restrains the growth of microscopic algae, improves the water quality, improves the circulation rate of nitrogen and phosphorus elements in the ecosystem, enables more nutritive salt to be deposited in the consumers of each trophic level, and controls the growth of the phytoplankton in terms of the aspect of bottom-up effect (nutritive salt) and the aspect of the up-bottom effect (food chain), thereby achieving the aim of controlling the water eutrophication of the 'artificial lagoon' of the Jinshan city beach.

The invention provides a method for recycling chloride ions in wastewater and relates to the technical field of industrial water treatment and comprehensive utilization of resources. The method provided by the invention comprises the following steps: pre-treating chloride-containing wastewater to remove suspension matters; conveying the wastewater into an extracting tower; taking an organic amine as an extracting agent, and carrying out countercurrent extraction and desulfurization to remove the chloride ions in the wastewater; discharging raffinate from an extracting system; when the content of the chloride ions in the raffinate does not reach circulating utilization or emission standards, carrying out reflux extraction; enabling an extracting solution to enter a back extraction tower; carrying out countercurrent back extraction on an ammonium chloride solution containing ammonia to generate ammonium chloride; separating by a water washing tower, cooling and crystallizing to obtain an ammonium chloride product; returning organic amine back into the extracting tower for recycling and returning a washing solution back to the water washing tower for recycling.

The invention relates to a flue gas desulfurization technique for a descending circulating fluidized bed. The core equipment of the reactor is a reactor structure, which comprises a straight-flow streamline inlet flue, an absorbent distributor, a sound-wave soot blower, a static mixer, a reaction shell, a humidifying and activating nozzle, a tapered swirl-board gas-solid separator, a gas-solid separation guide cylinder, a desulphurized-gas outlet flue and a hyperbolic ash hopper. The reactor has a rational configuration which enables the smoke in the reactor to be fully collided and mixed with the absorbent so as to obtain a stable and even flow field, a temperature field and a pressure field. Besides, the reactor enables the absorbent to obtain with higher circulation ratio and use ratio. The invention is out of any problems such as sticking wall, scaling and bed collapsing; meanwhile, the reactor reduces the dust load of the exit flue gas obviously and also lowers the load of the bag-type dust remover at the back part greatly, thereby guaranteeing the safe, reliable and long-term operation and solving the technical problem in the semidry method flue gas desulfurization effectively.

The invention discloses a device and a method for separating CO2 by circulating fluidized bed chemical looping-combustion of coal and combustible solid waste; the device mainly comprises three portions including a burning reaction system, a separation system and an oxygen carrying reaction system, wherein the burning reaction system is a circulating fluidized bed fuel reactor (1); the separation system comprises a one-stage inertial separator (2), a one-stage inertial separator outlet (3), a one-stage dipleg (4), a two-stage cyclone separator (11), a two-stage cyclone separator outlet (10) and a two-stage dipleg (12); the oxygen carrying reaction system comprises a cross-flow moving bed air reactor (6), a fresh oxygen carrier particle feeder (5), a J-shaped material returning valve (8) and an inactive oxygen carrier particle discharger (C); the method can enable the speed of combustion reaction of coal/combustible solid waste and oxygen carrier to be matched with the speed of oxygen carrying reaction of the oxygen carrier so as to achieve the effects that burning efficiency is high, oxygen carrying capability of the oxygen carriers is strong, concentration of separated CO2 is high, and final CO2 capturing rate is high.

The invention provides a production method and device of needle coke. The production method comprises the following steps: clarified oil enters an evaporation section of a heat exchange condensation tower through a convection chamber of a heating furnace, oil and gas overflowing from the top of coke towers enters the evaporation section of the heat exchange condensation tower, the clarified oil exchanges heat with the oil and gas from the coke tower, components below wax oil in the clarified oil and circulating oil condensed from the oil and gas form combined oil; the combined oil enters one coke tower for coke generation through a four-way valve after being heated by a radiation chamber of the heating furnace, and the two coke towers are used for coke generation in turn; wax oil circulation is established in the heat exchange condensation tower, and part of the wax oil is pumped out. The device at least comprises a clarifying oil buffer tank, a raw material pump, the heating furnace,the coke towers, the heat exchange condensation tower, a radiation feeding pump, a wax oil pump, a wax oil evaporator and a wax oil cooler. The provided production method and device of the needle cokecan produce the high-quality needle coke, and have the advantages that process flow is simple, operability is high, industrial production is facilitated and the like.

The invention discloses a production method for a feed-grade calcium phosphate acidity agent; the production method includes that: excessive phosphoric acid and ground phosphorite are added in a reactor for hybrid reaction to prepare calcium dihydrogen phosphate material containing fluorine and phosphoric acid, the material is added into a dryer for drying and defluorination to prepare the defluorinated calcium phosphate acidity agent containing free phosphoric acid. The production method has the main technical advantages of quick defluorination, extremely high efficiency, resource saving, extremely low cost, environmental-friendly property, energy saving and emission reduction; the technique inevitably brings about the revolution of feed calcium phosphate acidity agent industry.

The invention relates to an Undok pulverized coal gasification furnace, in particular relates to an Undok pulverized coal gasification furnace with a nitrogen, water vapor and synthesis gas-driven material return mechanism, and aims at solving the problems of high combustible matter content in fly ashes generated by an existing Undok pulverized coal gasification furnace and caused high specific coal consumption and low carbon conversion efficiency. The Undok pulverized coal gasification furnace comprises a gasification furnace body, a pipeline, a cyclone separator, a vertical feeding channel of cyclone separator outlet, a working gas flow control valve, a working gas pipeline and a horizontal feeding channel. The Undok pulverized coal gasification furnace is applied to the field of coal chemical industry.

The invention discloses a coal slime treatment method. The treatment method comprises the following steps: enabling coal slime to enter a reactor and be in contact with temperature-regulating medium particles in the reactor, carrying out a reaction under the effect of fluidizing air, performing separating treatment on the reacted flue gas, separating the large-size temperature-regulating medium particles taken out by the flue gas, returning to the reactor, and performing subsequent treatment on ground fine powder of small-particle coal slime and temperature-regulating medium particles in a flyash form along with the flue gas. According to the coal slime treatment method disclosed by the invention, due to use of the temperature-regulating medium particles in the reactor, a stable coal slime temperature is provided, coal slime reduction, innocent treatment and high-efficiency resource utilization can be realized, oxidation burning can be performed by taking pure coal slime as the raw material for recovering the heat, and the coal slime oxidation efficiency and thermal efficiency of the device are high.

The invention relates to the technical field of sodium ion batteries, and discloses a sodium-containing oxide positive electrode material, a preparation method and application thereof, a positive plate and application thereof. The content of soluble alkali on the surface of the positive electrode material meets the following conditions: (1) m (Na2CO3) + m (NaOH) is less than or equal to 15000ppm; (2) 0.1 < = m (Na2CO3)/m (NaOH) < = 1. The surface of the sodium-containing metal oxide positive electrode material has low soluble alkali content, and when the positive electrode material is applied to a sodium ion battery, the battery can have high capacity, high rate and high safety, and sodium ion deintercalation/intercalation reaction can be continuously performed without obviously causing reduction of the battery capacity.

The invention provides a preparation method and application of an anion-cation co-doped lithium-rich manganese-based positive electrode material, which comprises the following steps: uniformly mixingprecursor powder, lithium-containing compound powder, a certain amount of alkali metal M1-containing compound powder and a certain amount of negative valence M2-containing compound powder, carrying out heat treatment at 300-600 DEG C for 3-7 hours, heating to 700-1000 DEG C, and carrying out heat treatment for 8-20 hours. The element M1 replaces Li to inhibit migration of transition metal ions tothe lithium layer so as to stabilize the structure; the element M2 replaces O, so that the release of oxygen can be inhibited. According to the anion-cation co-doped lithium-rich manganese-based positive electrode material, the interlayer spacing is enlarged, the lithium ion migration rate is increased, the structure is stable, the average working voltage is relatively high, and the rate capability and the cycle performance are good.

The invention relates to a method for improving the circulation of materials in a paper mill boiler furnace. The method for improving the circulation of the materials in the paper mill boiler furnacecomprises the following steps that the temperature of the boiler furnace and the material conveying speed of feeding are detected, and the temperature of the boiler furnace and the material conveyingspeed of the feeding are kept constant; the returning air volume and the returning air pressure are detected, and the circulating ratio is calculated; if the circulating ratio is less than a preset value, the number of air cap holes of returning air and aeration air or the bore diameters of the air cap holes of the returning air and the aeration air are increased; the returning air volume and thereturning air pressure are detected in real time, and the circulating ratio is calculated again; and the steps are cycled until the circulating ratio is greater than the preset value and the returningair volume and the returning air pressure are within a preset range. Different from the prior art, according to the method for improving the circulation of the materials in the paper mill boiler furnace, by increasing the returning air volume and decreasing the returning air pressure slightly, the circulation ratio between the materials is effectively increased, the heat load rate of a boiler isevidently accelerated, and the thermal efficiency of the boiler is promoted.