7 results about "Limewater" patented technology

The application discloses a preparation method of silane composite nano C-S-H for hydrophobic modification of a concrete surface and application thereof, and relates to the field of building engineering materials. In the prior art, silane is prone to self-polymerization in a strong alkali environment, is difficult to be stably compounded with nano C-S-H, and cannot realize the synergistic effect of hydrophobicity and densification during the construction window period of fresh concrete. The application comprises the following steps: preparing a silane hydrolysis solution A, mixing ethanol, water and n-octyl triethoxysilane in a mass ratio of 50:1:(1.5-2.5), first hydrolyzing in an acid to adjust the pH, and then adjusting to near neutrality by an alkali; preparing a surface aminated dispersion solution B, dispersing nano C-S-H in an alkaline medium, adjusting the solid content and the pH by saturated lime water, and adding gamma-aminopropyl triethoxysilane to react; adding the liquid A into the liquid B to condense, and adjusting the solid content and the pH after alcohol removal. The technical scheme realizes the improvement of hydrophobicity, anti-permeability and chlorine ion resistance, and the obtained suspension is used for concrete surface treatment, so that the synergistic improvement of rapid hydrophobicity and surface layer densification can be realized.

The application discloses a method for treating and utilizing large-particle waste sand in ammonia-alkali method alkali waste liquid, and the process is as follows: treating the large-particle waste sand, reducing the content of soluble salt in the waste sand through water washing, controlling the content of soluble salt in the waste sand to be less than or equal to 2%, designing the mixing proportion of the waste sand lime cement soil, replacing the soil in the cement lime soil with different amounts of waste sand, keeping the mass ratio of the admixture lime and cement unchanged in each test, and decreasing the content of the soil corresponding to the waste sand proportion gradient; carrying out the compaction test on the materials in each group under different target moisture contents, obtaining the maximum dry density and the optimum moisture content of the sample; determining the waste sand replacement interval of the waste sand lime cement soil meeting the strength and the optimum proportion of the waste sand lime cement soil material; and preparing the waste sand lime cement soil for paving the roadbed or the base of the road. The application solves the phenomenon of pipe grinding in the process of filling the well with the alkali waste liquid, prepares the road material according to the designed proportion of the large-particle waste sand and the lime soil, reduces the cost of the alkali waste liquid, and changes the large-particle waste sand into the road raw material.

The utility model belongs to the field of waste gas treatment, specifically is a kind of environmental protection type desulfurization device, including tower body, the bottom of tower body is installed slurry pool;The side of slurry pool is equipped with delivery pump, the slurry in slurry pool can be extracted by delivery pump;The output end of delivery pump is fixed with delivery pipe, the inside of tower body is equipped with spray tray, the inside of spray tray is equipped with cavity, delivery pipe and spray tray are fixed, delivery pipe and cavity are connected, the bottom of spray tray is equipped with multiple atomizing nozzles, slurry is distributed to the nozzle below in cavity, nozzle is sprayed lime water slurry in the inside of tower body, waste gas needs to flow below spray tray, and from the air pipe to flow to the top of spray tray, rely on above-mentioned structure setting, to this can improve waste gas distribution uniformity and lime slurry spraying uniformity, improve waste gas and lime slurry reaction uniformity, to further improve desulfurization treatment effect.

The application discloses a desulfurization and denitrification method for industrial waste gas. In the desulfurization and denitrification method for industrial waste gas, a desulfurization and denitrification device is used to perform desulfurization and denitrification treatment on the industrial waste gas, lime water and waste gas are respectively output by lime water nozzles and waste gas nozzles arranged in rotation, the lime water is arranged above the waste gas, so that the lime water and the waste gas are in mutual contact during the falling of the lime water and the rising of the waste gas, the lime water and the waste gas are fully mixed and contacted, the lime water and the waste gas are fully reacted, meanwhile, the upward thrust generated when the waste gas is sprayed is used to support the small droplets of the lime water output by the lime water nozzles, the falling time of the lime water in the air is prolonged, the contact reaction time of the lime water and the waste gas is further prolonged, the utilization rate of the lime water is improved, and the desulfurization and denitrification effect on the industrial waste gas is improved.

This invention belongs to the field of natural gas desulfurization technology, specifically relating to a multi-stage desulfurization device for recovering sulfur-containing natural gas tail gas. It includes an inlet pipe, a desulfurization mechanism, a stirring mechanism, and a purification mechanism. The desulfurization mechanism controls a gas pump to draw natural gas tail gas into the gas transmission pipe through the inlet pipe. Lime solutions inside the first, second, and third tanks sequentially adsorb sulfur dioxide from the tail gas upon contact, thus achieving multi-stage desulfurization and improving the desulfurization effect. The stirring mechanism, controlled by a servo motor, rotates the stirring blades to agitate the lime solution, further enhancing the desulfurization effect. The purification mechanism uses activated carbon plates to adsorb water vapor and impurities in the tail gas, reducing odor emissions. Baffles reduce the speed of the tail gas movement within the fourth tank, increasing the contact time between the tail gas and the activated carbon plates, thereby improving the purification effect.

This invention discloses an alternating injection self-regulating plugging method and conveying device for oil extraction, including a combustion furnace. A first connecting pipe is fixedly connected to one side of the top of the combustion furnace, and an air inlet pipe is fixedly connected to the bottom of the first connecting pipe. A water guide pipe is provided on the side of the air inlet pipe away from the combustion furnace. A sliding mechanism is provided between the air inlet pipe and the water guide pipe. This invention, through the provided sliding mechanism and the first scraping mechanism, can, when self-regulating plugging is required for oil extraction, alternately inject flue gas, after purification, cooling, and compression, with limewater sluice into the oil well for displacement oil extraction. This avoids the problems of existing profile control and sealing technologies, which mainly rely on injecting foam, gel, or solid particle plugging agents into the injection well to prevent gas channeling. These methods suffer from insufficient strength, short effective period, and inconsistencies between the plugging and channeling locations, resulting in low efficiency and high cost. This invention improves oil displacement efficiency.

The application discloses a pyrolysis device for selective catalytic denitration coupled with carbon capture, which comprises a shell and a disturbance tube, the shell has a thermal decomposition chamber and a carbon capture chamber, the thermal decomposition chamber is used for pyrolyzing ammonium carbamate powder and generating pyrolysis gas of carbon dioxide and ammonia, the shell has a slaked lime water inlet, a pyrolysis gas outlet and a solid outlet which are communicated with the carbon capture chamber, the slaked lime water inlet is used for slaked lime water to enter the carbon capture chamber to adsorb carbon dioxide in the pyrolysis gas discharged by the thermal decomposition chamber, one end of the disturbance tube extends into the carbon capture chamber, and a gas outlet hole is arranged on the outer peripheral wall of the disturbance tube, and the disturbance tube is used for disturbing slaked lime water solution in the carbon capture chamber. Compared with urea ammonia production, the ammonia production efficiency is increased by 6.4% to 27.2%, the average increase is 16.8%, the ammonia production energy consumption is reduced by 32% to 38.8%, meanwhile, the denitration efficiency of the mixed gas generated into a flue gas selective catalytic denitration reactor can be increased by 3.2% to 4%.