69results about How to "Improve fluidization state" patented technology

A microorganism desulfurizing and sulfur recycling method. A gas material flow containing hydrogen sulfide is fed into an absorption column and then is subjected to chemical absorption with an alkali solution sprayed from the top of the column in a counter-contact manner, wherein treated purified gas is discharged out from the top of the absorption column. A back-washing apparatus is arranged in the absorption column to wash the sulfur attached to a filling material. A rich solution, in which the hydrogen sulfide is dissolved, is fed into a rich solution tank from the bottom of the absorption column and then is fed into a bio-reactor for aeration, so that a carrier, on which desulfurization bacteria is immobilized, is fluidized and the sulfide in the absorption solution is biologically oxidized to generate elementary sulfur. The regenerated solution containing the sulfur then is fed into a settling tank through an overflow weir of the bio-reactor and a supernatant liquid is fed into a barren solution tank. The supernatant liquid then is fed back to the absorption column for being recycled through a barren solution pump. Sulfur slurry in the bottom layer is discharged through the bottom of the settling tank and then is subjected to solid-liquid separation in a centrifugal machine to obtain biological sulfur. A separated filtrate is fed back to the bio-reactor for being recycled. The bio-desulfurization technology is green and environment-friendly, is energy-saving and emission-reducing and can recycle resources, and has social, economical and environmental benefits.

The invention discloses preparation and an application of a nitrifying bacteria immobilized bioactive filler based on a polyurethane carrier, and belongs to the technical field of water treatment. The bioactive filler comprises two parts: an embedding body and the polyurethane carrier; a porous structure of the polyurethane foam carrier can provide a quite good and relatively stable living environment for microorganisms, and is beneficial for attachment and reproduction of the microorganisms. An embedding liquid is prepared by mixing a nitrifying bacteria concentrated solution and a polyvinyl alcohol solution; a whole sheet of polyurethane foam is used as the embedding carrier, the embedding liquid is immersed to the interior of the polyurethane foam by squeezing and other ways, the embedding body is formed after boric acid secondary cross-linking and is combined with the polyurethane carrier to obtain a filler shape meeting requirements, and thus the nitrifying bacteria bioactive filler is obtained. The prepared nitrifying bacteria immobilized bioactive filler not only solves the problems that nitrifying bacteria are difficult in advantage establishment, easy to lose and the like, but also improves the processing ability of a reactor, shortens the start-up time, and has broad application prospects.

The invention relates to a device and a process for preparing struvite crystals from nitrogen and phosphorus in sewage. The device comprises a reactor (5), a pH (potential of Hydrogen) controller (25), a pH regulating pump (24), an alkali liquor tank (23), a nitrogen and phosphorus containing waste water tank (22) and a secondary sedimentation tank (19), wherein the reactor (5) is composed of a reactor feed pipe (9), a reactor crystal collecting pipe (8), a reactor growth tube (3) and a reactor sediment tube (2) from bottom to top. The process comprises the steps of pumping nitrogen and phosphorus containing wastewater into the reactor (5) and pumping a magnesium chloride solution into the reactor (5) to ensure that the molar ratio of NH3-N to PO43-P to Mg <2+> in the reactor (5) is (1:1:1)-(1:1:1.3); controlling the reflux ratio between 14 and 28 and the pH equal to 6.4-9.2; and forming the struvite crystals in the reactor (5) by using the nitrogen, phosphorus and magnesium containing solution. The device disclosed by the invention has the advantages of simple structure and small floor space, is simple and easy to operate and difficult to scale, can be widely applied to preparation of the struvite crystals from the nitrogen and phosphorus containing wastewater such as coking wastewater, pig manure wastewater or sludge fermentation liquor, and is capable of realizing the resource recycling of nitrogen and phosphorus.

The invention provides a gas distributor for an ash agglomerating fluidized-bed gasification furnace. The gas distributor comprises a gasification furnace shell, a tapered distribution plate, at least three distributed injection pipes, a slagging pipe and a gas inlet pipe of a gas chamber, wherein one end of the slagging pipe is connected to the bottom of the tapered distribution plate, and is open, and the other end of the slagging pipe penetrates through the gasification furnace shell, and is connected with a gasification agent gas source. The gas distributor is characterized in that one end of each distributed injection pipe is connected to the lower part of the tapered distribution plate, and is open, and the other end of each distributed injection pipe penetrates through the gasification furnace shell, and is connected with the gasification agent gas source; and openings of the distributed injection pipes in the tapered distribution plate are symmetrically and uniformly distributed about the center of the slagging pipe. The gas distributor is high in fluidization performance, adapted to long-cycle running, simple in structure and applicable to a large-sized fluidized-bed gasification furnace.

The invention discloses a method for producing butadiene through mixing carbon C, mainly solving the problems of poor butene conversion per pass, low butadiene once through yield and large device energy consumption in the prior art. The following main technical schemes are adopted to realize the purposes: adopting a ferrite catalyst and a fluidized bed reactor reaction technology to carry out oxidative dehydrogenation on butene in a mixed carbon C so as to generate butadiene; exchanging heat with a desalted water by utilizing a gas generated after the reaction and generating a byproduct-steam, further cooling the gas to be about 110 DEG C, and filling the gas into a quench tower to remove impurities such as water, oxides and solid powder; condensing the quenched gas to be about 1.2MPa, absorbing and resolving to obtain crude butadiene; and treating the crude butadiene through utilizing a conventional butadiene extraction and separation technology so as to obtain a polymer grade butadiene product. By utilizing the method, the conversion per pass of the butene in the mixed carbon C is more than 90%, the butadiene selectivity is more than 95%, the device energy consumption is reduced by about 40%, and the device investment is saved about 20%, and the method can be applied to the field of butadiene industrial production.

The invention discloses preparation and an application of an ammonia oxidizing bacteria immobilized bioactive filler based on a polyurethane carrier, and belongs to the technical field of water treatment. The bioactive filler comprises two parts: an embedding body and the polyurethane carrier; a porous structure of the polyurethane foam carrier adsorbs a bacteria-containing embedding liquid, wherein the embedding liquid is prepared by mixing an ammonia oxidizing bacteria concentrated solution and a polyvinyl alcohol solution; a whole sheet of polyurethane foam is used as the embedding carrier, the embedding liquid is immersed to the interior of the polyurethane foam by a squeezing way, the embedding body is formed after boric acid secondary cross-linking and is combined with the polyurethane carrier to obtain a filler shape meeting requirements, and thus the ammonia oxidizing bacteria bioactive filler is obtained. The prepared ammonia oxidizing bacteria immobilized bioactive filler not only solves the problems that ammonia oxidizing bacteria are difficult in advantage establishment, easy to lose and the like, but also improves the processing ability of a reactor, shortens the start-up time, and has broad application prospects.

The invention discloses preparation and an application of a sandwich-type multilayer immobilized bioactive filler, and belongs to the technical field of water treatment. The bioactive filler is composed of two parts: embedding bodies and non-woven carriers; the embedding bodies are obtained by boric acid secondary cross-linking curing of an embedding liquid; the embedding bodies and the non-woven carriers are in alternative arrangement; fiber yarns of the non-woven carriers and the embedding bodies are combined into a stable organic whole; the embedding liquid formed by mixing a bacteria concentrated solution and a polyvinyl alcohol solution evenly coats the non-woven carriers, multiple layers of carriers are overlaid together, a layered filler having a sandwich-like structure is formed after boric acid secondary cross-linking curing, and then the granular bioactive filler is prepared through cutting the layered filler. The problems that bacteria in a traditional biochemical method are low in concentration, easy to lose and the like are solved, and moreover, the sandwich-like layered structure formed by the non-woven fabrics and the embedding bodies improves the stability of the bioactive filler, and the bioactive filler has a good application prospect.

The invention discloses an additive capable of improving utilization rate of silicon power in synthesis of methyl chlorosilane. The additive is characterized by being prepared from the following components in parts by weight through mixing: 30-70 parts of an oxide, 25-50 parts of silicon powder, 4.5-15 parts of copper powder and 0.5-5 parts of zinc powder, wherein the average particle size of the additive is 70-100mm and the weight ratio of silicon oxide to aluminum oxide to calcium oxide in the oxides is (82-87) to (7-13) to (3-7). At the later stage of a reaction between silicon powder and chloromethane in a fluidized bed, by adopting the reaction additive disclosed by the invention, the intensity of the reaction in the fluidized bed is effectively controlled and thus the quality of the reaction product can be ensured, and meanwhile, since silicon powder is in full contact with chloromethane, the conversion rate of silicon powder is improved, the generation of waste silicon powder is reduced and therefore the production benefits are further increased.

The invention relates to the technical field of low-temperature desulfurization for waste tires, in particular to a method for preparing rubber powder by desulfurizing the waste tires at low temperature through an ammonia method. The method includes the steps that after the waste tires are cut into blocks, magnetic separation, grinding, magnetic separation and grinding are carried out on the blocks to obtain powder of 80-100 meshes; the powder is treated through a circulating fluidized bed treater, ammonia gas is introduced, ammonia gas introducing speed and time are controlled, the catalytic action of microwave radiation is combined, S-S bonds and S-C bonds in the waste tires are activated by the ammonia gas, bond energy is reduced, the fracture rate is increased, and the sulfur component in the waste tires is removed. As the method for recovering and preparing the waste tires into the rubber powder is low in cost and energy consumption, the desulfurizing step can be carried out in a low-temperature environment, the high quality of the rubber powder is ensured, and the quality of rubber powder prepared by recovering the waste tires is improved.

The invention provides a mesoporous selective molecular sieve and a preparation method thereof. The mesoporous selective molecular sieve is obtained by performing alkali treatment on IM-5 zeolite with the silica-alumina ratio being 10 to 14. The preparation method comprises the following steps that the IM-5 zeolite is added into an alkali treatment solution for alkali treatment; after filtering, washing and drying, the mesoporous selective molecular sieve is obtained, wherein the alkali treatment solution comprises one or a combination of several of a NaOH solution, a KOH solution, a TPAOH solution and a TBAOH solution. The mesoporous IM-5 molecular sieve can be applied to cracking reaction; the mesoporous IM-5 molecular sieve has rich mesopores, so that in the reaction process, the catalyst fluidizing state is better; heavy oil macromolecules can easily approach to the active center; cracked products can be easily diffused; the yield of ethylene and propylene is relatively high; catalysts cannot generate carbon deposition, so that the catalysts have good catalytic activity and long service life.

The invention relates to a high-efficiency magnetic roasting boiling furnace of a sulfurous iron ore calcination acid making device. The boiling furnace provided by the invention is characterized in that the whole section in an air chamber is provided with a gas pre-sparger, the tilt angle of the charging opening is of a 35-degree groove type structure, and the distance from the bottom of the charging opening to air caps is greater than or equal to 2600 mm; a deslagging heat recovery unit is arranged for deslagging cooling and heat recovery; the air caps are arranged at high density of 80-100/m<2>, and the fluidized state of a boiling bead is optimized; and a tertiary air device is arranged along the tangential direction of a furnace body. According to the invention, the air chamber is provided with the pre-sparger and the gas distribution plate is provided with the air caps at high density, the fluidization condition is effectively improved and a boiling layer is guaranteed to be a weak oxygen state, and the flow distribution is uniform; and the tilt angle of the charging opening is improved as the 35-degree groove type structure, the charging material height is improved, the mineral aggregate is not stacked, the roasting temperature is improved, the slag disabled sulfur content is reduced, meanwhile, the inlet air is supplementally added, the sublimed sulfur is not generated, and the magnetic firing condition is met.

The invention discloses an ammonia oxidizing bacteria immobilized star-shaped bioactive filler based on a reticulate carrier, and preparation and an application thereof, and belongs to the technical field of water treatment. The star-shaped bioactive filler comprises two parts: an embedding body and the carrier; the carrier is a star-shaped reticulate carrier formed by taking polyethylene or polypropylene as a main material, adding a polyvinyl alcohol hydrophilic material and carrying out hot melting or plate hot pressing; with a reticulate structure of the carrier, the embedding body can be allowed to penetrate through meshes to form a riveting fixing structure so as to increase the filler overall stability; an embedding liquid is formed by mixing an ammonia oxidizing bacteria concentrated solution and a polyvinyl alcohol solution; the reticulate carrier is evenly coated with the embedding liquid, and the embedding body is formed after boric acid secondary cross-linking and is combined with the reticulate carrier to obtain the ammonia oxidizing bacteria bioactive filler. The prepared ammonia oxidizing bacteria immobilized star-shaped bioactive filler not only solves the problems that ammonia oxidizing bacteria are difficult in advantage establishment, easy to lose and the like, but also improves the processing ability of a reactor, shortens the start-up time, and has broad application prospects.

The invention discloses a blowing desulfurization fluidized chamber. The blowing desulfurization fluidized chamber comprises a shell (4) which comprises a desulfurizer inlet (1) and a desulfurizer outlet (3) formed in the height direction, an air supply duct (2) and an air distributing plate (6) provided with a plurality of air outlet holes (5) densely, wherein the upper edge of the air distributing plate (6) is attached to the inner wall of the shell (4) and the lower edge is connected with the desulfurizer outlet (3) so as to divide the shell (4) into a fluidized chamber (7) above the air distributing plate (6) and an air inlet chamber (8) below the air distributing plate (6); the air supply duct (2) is communicated with the air inlet chamber (8); and gas supplied from the air inlet chamber (8) enters into the air inlet chamber (8) and is sprayed into the fluidized chamber (7) through the plurality of air outlet holes (5) of the air distributing plate (6). According to the blowing desulfurization fluidized chamber disclosed by the invention, the desulfurizer is uniformly fluidized in the process of discharging the desulfurizer with a relatively good fluidizing effect, so that the desulfurizer is stable in discharging speed, the blowing process time is shortened, the spattering is reduced, and the iron loss is reduced.

The invention discloses preparation and an application of an ammonia oxidizing bacteria sandwich-type multilayer immobilized bioactive filler, and belongs to the technical field of water treatment. The ammonia oxidizing bacteria bioactive filler is composed of two parts: embedding bodies loaded with ammonia oxidizing bacteria and non-woven carriers; the embedding bodies and the non-woven carriers are alternatively arranged; fiber yarns of the non-woven carriers and the embedding bodies are combined into a stable organic whole, an embedding liquid prepared by mixing an ammonia oxidizing bacteria concentrated solution and a polyvinyl alcohol solution evenly coats the non-woven carriers, and multiple layers of carriers are overlaid together, after boric acid secondary cross-linking, the embedding liquid is cured to form the embedding bodies, and the embedding bodies are combined with the non-woven carriers to form a layered filler having a sandwich-like structure, and then the ammonia oxidizing bacteria granular bioactive filler is prepared through cutting the layered filler. The problems that the ammonia oxidizing bacteria are difficult in advantage establishment and are easy to lose are solved, the processing ability of a reactor is improved, and moreover, the sandwich-like layered structure formed by the non-woven fabrics and the embedding bodies improves the stability of the bioactive filler.

The invention particularly relates to a garden type ecological floating island for in-situ upgrading and reconstruction. The garden type ecological floating island comprises a gas collecting and releasing device, a floating island frame, a filler area, filler, a plant planting area, emergent aquatic plants, a self-control rotation control system and a motor. The ecological floating island is provided with the gas collecting and releasing device, so that the loss of dissolved oxygen is reduced; the ecological floating island is provided with the filler area, so that the sludge concentration of the system is increased, the utilization rate of dissolved oxygen is increased, and the removal rate of organic matters and nitrogen is increased; the automatic rotation control system of the ecological floating island can relieve the blockage problem; and the upper part of the floating island is the emergent aquatic plant planting area for absorbing organic matters and nitrogen in sewage, and meanwhile, the effects of beautifying and deodorizing the oxidation ditch are achieved.

The invention discloses a circulating fluidized bed gasification furnace starting system, which comprises a gasification furnace, a coal inlet system, a furnace baking gas system, a flue gas purification system and a flue gas circulation system. According to the present invention, when the furnace is started by using the method, the temperature rising and the pressure increasing of the gasification furnace are simultaneously performed, such that the condition that the temperature rising and the pressure increasing cannot be simultaneously performed in the conventional gasification furnace starting method is solved; by using the un-heated mixed gas as the coal powder conveying gas and the fluidizing agent, the coal powder in the gasification furnace can maintain a good fluidization state, the occurrence of the slagging accident in the gasification furnace can be avoided, the temperature rising and pressure increasing process can be shortened, the furnace starting time can be short, theunqualified synthesis gas volume is low, the waste of resources is reduced, and the environmental protection load of the enterprise is reduced; and the heating process mainly relies on the furnace baking gas, and the furnace baking gas has high heat efficiency, such that the coal powder consumption for ignition is reduced, and the production cost of the enterprise is lowered.

The invention relates to a tube-type fluid bed reactor in the production of chlorothalonil. The fluid bed of the reactor comprises a coil heat exchanger and a tube-type heat exchanger. The coil heat exchanger is arranged below the lower end socket of the fluid bed, and the tube-type heat exchanger is arranged between the coil heat exchanger and the barrel body of the fluid bed. Compared with the prior art, the tube-type fluid bed reactor has the advantages of high temperature, high yield, low cost and the like.

The invention discloses a novel roller dryer. The novel roller dryer is composed of a roller, a gas distributor, a rotary joint and a roller driving mechanism. The working principle of the novel roller dryer is as follows: dry gas is introduced into the roller through the rotary joint and the distributor to realize lower semicircular gas inlet and upper semicircular gas outlet in the roller, and agas inlet and a gas outlet in the roller are sequentially changed along with the rotation of the roller to form gas flow from bottom to top in the roller, so that a dried material is in an approximate fluidized state, and drying of the material is further achieved. The novel roller dryer has the advantages of being high in drying efficiency, wide in material application range, capable of meetingthe GMP standard, high in automation degree and the like, and is an ideal substitute product for traditional stirring dryers, rotary dryers, helical ribbon dryers, rake dryers, box dryers and the like.