8results about How to "Reduce tar" patented technology

The patent relates to the technical field of tobacco, and particularly relates to a conveying system for a paper-process sheet drying oven and the paper-process sheet drying oven. The conveying system comprises a conveying device, a first deviation rectifying device and a second deviation rectifying device. The first deviation rectifying device and the second deviation rectifying device are both used to provide displacement in a deviation rectifying direction to the conveying belt, the deviation rectifying direction is perpendicular to the length direction of the conveying belt, the distance between the first deviation rectifying device and the end driving roller is not greater than 10%, 20% or 25% of the length direction size of the transmission assembly, and the second deviation rectifying device is arranged substantially symmetrically to the middle line of the transmission assembly in the length direction of the first deviation rectifying device. The patent can better solve the deviation problem of the conveying belt, save labor cost, improve production efficiency and reduce the labor intensity of the operator. The deviation rectifying frequency of the first deviation rectifying device and the second deviation rectifying device is lower during the working process, and the first deviation rectifying device and the second deviation rectifying device are more suitable for deviation rectifying of long-distance belt conveying systems and have a longer service life.

The invention discloses surface-modified porous reconstructed tobacco particles, a preparation method thereof and a low-harm cigarette. The tobacco particles are prepared from the following raw materials in parts by weight through granulation and curing: 40-70 parts of tobacco raw materials, 20-55 parts of a filling agent, 1-8 parts of a humectant, 0.5-2.5 parts of a combustion improver, 0.05-1.5 parts of an essence material, 1-8 parts of a water-based coating material and 0.2-2 parts of nano metal oxide. The preparation process of the tobacco particles comprises the following steps: uniformly mixing the raw materials, granulating, spraying a modified mixed solution consisting of a water-based coating material and a nano metal oxide on the surfaces of the particles, and drying to obtain the tobacco particles. A low-harm cigarette formed by rolling a full-particle cigarette rod formed by curing the reconstructed tobacco particles and a cigarette filter paper rod is based on a three-dimensional honeycomb net structure of the reconstructed tobacco particles and catalytic degradation of harmful substances, and the technical problem that in the prior art, the harmful substances are reduced along with the evacuation feeling is effectively solved; and tar and other harmful components in the smoke are effectively reduced while the mellow and normal flavor of the smoke is ensured.

The present invention belongs to the field of new material technology, and relates to the preparation of carbon fiber, and specifically to a method for improving the carbon yield of viscose-based carbon fiber. The method comprises the following steps: (1) soaking the viscose yarn in water at 80 to 90°C, ultrasonically cleaning it after soaking, and then soaking it in triethanolamine and diammonium phosphate solution in turn for catalytic treatment; (2) drying the catalytically treated viscose yarn, and then pre-oxidizing and stretching it at 220 to 280°C to obtain pre-oxidized yarn; (3) carbonizing and stretching the pre-oxidized yarn in a nitrogen atmosphere, and then cooling it to room temperature to obtain viscose-based carbon fiber. The present invention inhibits the production of L-glucose tar substances during the pre-oxidation and carbonization process, reduces the amount of tar during fiber carbonization, thereby reducing the decomposition loss of carbon and improving the carbon yield of viscose-based carbon fiber.

The invention relates to a preparation method of ultralow-tar flue-cured tobacco type fine cigarettes, which comprises the following steps: selecting tobacco leaves with low sugar content and high alkali content according to a formula of a low-tar fine tobacco leaf group, and blending with low-tar high-aroma slices; determining key process parameters of the low-temperature aroma-keeping processing technology; the low-tar charging and perfuming design comprises a material liquid module and a perfuming module; the feed liquid module is mainly composed of a caramel sweet system; the perfuming module is mainly used for roasting fragrance and fruit fragrance and endows the set spicy fragrance and flower fragrance, and the effects of improving the fragrance quality, improving the sweetness and improving the taste are achieved; the low-tar fine cigarette auxiliary material is a high-adsorption and medium-ventilation dilution auxiliary material. According to the technical scheme, the flavor blending main material tobacco which is low in sugar-alkali ratio, high in alkali content, rich in fragrance, good in fragrance quality and sufficient in concentration is selected, so that the fragrance and the plumpness of smoke are increased, and the smoking satisfaction is improved; high-adsorption and medium-ventilation dilution auxiliary materials are matched, so that the aroma quality and the comfort degree of the low-tar cigarettes are improved.

This invention relates to a method for reducing tar during carbon fiber production, a method for preparing carbon fiber, and the resulting carbon fiber. The method for reducing tar during production includes drying and pre-oxidizing the precursor fiber to obtain pre-oxidized fiber, and then subjecting the pre-oxidized fiber to low-temperature carbonization. In these steps, the fiber tension is controlled based on the product of the tow number and fineness to reduce the amount of tar generated during carbon fiber preparation. After low-temperature carbonization, high-temperature carbonization is performed to obtain carbon fiber. This method for preparing carbon fiber with reduced tar during production not only effectively reduces the amount of tar generated during the production of large-tow carbon fiber, and effectively solves the problems of excessive tar and easy blockage of the low-temperature carbonization furnace exhaust outlet in existing processes for preparing large-tow carbon fiber, but also improves carbon yield and the mechanical properties of carbon fiber.

The invention discloses a municipal sludge pyrolysis carbonization treatment system and a treatment process. The system comprises a sludge treatment device, a flue gas treatment device, a pyrolysis gas purification device, a heating device, a blower, a heat exchanger and an air mixing tank. After the wet sludge is squeezed by a vertical filter press and dried in an internal heating rotary drying kiln, it is sent to a vertical pyrolysis machine for pyrolysis and carbonization. In addition to the sludge-based biochar product output system, the product pyrolysis gas enters a spray tower for separation and purification, and the purified combustible gas is all sent to a burner as a recycled heat source. The purified and separated heavy components are mixed with the sludge for secondary pyrolysis. The excess flue gas generated by the entire system is treated and discharged in compliance with the standards. The system changes the properties of the sludge through chemical reactions, meets the final treatment requirements of the sludge, has the advantages of simple production process, stable output state, no secondary pollution, etc., realizes the requirements of sludge treatment for reduction, stabilization, harmlessness and resource utilization, and meets the "four transformations" principle of sludge disposal.

A cigarette filter which includes lyocell tow made of a plurality of lyocell fibers and a binder configured to bond the lyocell fibers to each other is provided. The cigarette filter according to one embodiment of the present disclosure reduces each of tar and nicotine, which are delivered through cigarette smoke, 70 wt% to 95 wt%. The cigarette filter according to one embodiment of the present disclosure has a resistance to draw of 80 mmWG to 200 mmWG. The cigarette filter according to one embodiment of the present disclosure is filled with the lyocell tow at a packing density of 0.2 g / mL to 0.6 g / mL. The cigarette filter according to one embodiment of the present disclosure addresses basic material-related problems, such as low hardness, of the lyocell tow and, further, has excellent filtration functionality as a filter.

The present invention discloses a system and method for realizing energy utilization of Chinese medicine waste residue by using red mud solid waste, the system comprises an air reactor, a gasification reactor, a red mud multifunctional carrier supplementary feeding device, an air source, a gas-solid separator I, a preheater I, a drying device, a crushing device, a mechanical dewatering device, a biomass solid waste feeding device, a gas-solid separator II, a synthesis gas treatment system, a burner, an impurity removal device, and a preheater II; the red mud multifunctional carrier particles are oxidized in the air reactor and then enter the gasification reactor, the Chinese medicine waste residue is dehydrated, crushed, and dried and then enters the gasification reactor, the Chinese medicine residue dry particles contact and react with the red mud multifunctional carrier particles in a high temperature and oxygen-deficient environment, and are gasified to produce synthesis gas under the action of water vapor. The present invention proposes for the first time a method for simultaneously treating two solid wastes, red mud and Chinese medicine waste residue, which not only fully realizes the energy utilization of Chinese medicine waste residue, but also realizes the harmless treatment of Chinese medicine waste residue.