11results about How to "Reduce hydration" patented technology

This invention relates to the field of pulverized coal conveying and dust removal technology, specifically to a pulverized coal dust removal method, comprising: S1: Constructing a dust removal system: setting up a dust cover on a conveyor belt, setting up a pressure-reducing chamber on the dust cover, installing wear-resistant baffles at the bottom of the dust cover, and installing a dust curtain inside the dust cover; installing a dust collector at the top of the dust cover; S2: Coal conveying and primary dust removal: starting the conveyor belt to transport coal, the coal falls onto the conveyor belt, and the generated dust-laden gas forms a local high-pressure zone under the obstruction of the dust curtain, causing a portion of the dust-laden gas to undergo primary filtration through the filter components on the pressure-reducing chamber; S3: Secondary dust removal: the remaining dust-laden gas in the dust cover is sucked into the dust collector, the dust-laden gas enters below the liquid surface of the dust collector, causing the pulverized coal particles to settle and form coal slurry, which is then transported outside the dust collector, and the purified gas is discharged through the outlet. This method achieves closed-loop control of the entire process from source dust suppression to end-of-pipe treatment through two-stage synergistic dust removal, improving the dust removal effect.

The application provides an anode foil and a preparation method thereof. The preparation method comprises the following steps: providing an unformed foil, wherein the unformed foil comprises an aluminum foil base material and an aluminum powder sintering layer arranged on the surface of the aluminum foil base material; and sequentially performing the following processes on the unformed foil: water boiling, first-stage chemical conversion, second-stage chemical conversion, third-stage chemical conversion, power feeding treatment, fourth-stage chemical conversion, fifth-stage chemical conversion, first-stage heat treatment, first chemical conversion repair, first phosphoric acid treatment, second chemical conversion repair, second-stage heat treatment, third chemical conversion repair and second phosphoric acid treatment. The solutes of the electrolyte of the first-stage chemical conversion, the second-stage chemical conversion and the third-stage chemical conversion comprise citric acid, triammonium citrate, adipic acid, ammonium adipate, salicylic acid, hypophosphite, boric acid and ammonium salt, and the solvent is water. The solutes of the electrolyte of the fourth-stage chemical conversion and the fifth-stage chemical conversion comprise citric acid, triammonium citrate, sebacic acid, ammonium sebacate, salicylic acid, sodium hypophosphite, boric acid and ammonium salt, and the solvent is water. An anode foil prepared by the preparation method has a high specific capacity and a small hydration leakage current.

This invention belongs to the field of industrial solid waste resource utilization technology, and relates to a circulating fluidized bed ash-based cementitious material for road base courses and its preparation method. The raw materials for the road base course cementitious material are composed of the following mass parts: 29-43 parts of circulating fluidized bed ash, 16-27 parts of ground blast furnace slag, 3-6 parts of silica fume, 7-15 parts of P.O42.5 silicate cement, 0.1-0.4 parts of activator, and 27-30 parts of water. The circulating fluidized bed ash is prepared by mixing circulating fluidized bed fly ash and slag in a mass ratio of (2-5):(5-10). This invention effectively alleviates the problems of fast setting time and shrinkage cracking of traditional road base course cementitious materials by utilizing the characteristics of micro-expansion and long hydration time of circulating fluidized bed ash. The advantage of this invention is that it promotes the large-scale utilization of circulating fluidized bed ash and contributes to carbon emission reduction in the road sector.

The invention discloses a preparation method of a composite admixture for a high-calcium fly ash-based geopolymer. According to the additive, natural tannic acid serves as a raw material, an ATRP initiator is grafted through esterification reaction to prepare a brominated tannic acid macroinitiator (TA-Br), then the brominated tannic acid macroinitiator serves as a core, acrylic acid and polyethylene glycol methyl ether methacrylate are catalyzed to be subjected to ATRP graft copolymerization in a water-alcohol mixed system, and the core-shell structure additive with the tannic acid as the core and polycarboxylic acid as the shell is formed. According to the admixture, the retarding effect of tannic acid and the water reducing effect of polycarboxylic acid are integrated, and the problem that polycarboxylic acid in a high-calcium system is prone to failure is solved. Wherein the tannic acid core firmly adsorbs Ca < 2 + > and delays hydration, and the polycarboxylic acid shell provides high-density dispersion force, so that the problems of high water demand and short coagulation time of the high-calcium fly ash geopolymer are solved synergistically. The additive is green and environment-friendly in raw material, excellent in performance and suitable for a strong-base high-calcium geopolymer environment.

The invention discloses a water recycling control method of a water electrolysis hydrogen production system and the hydrogen production system, and the control method comprises the following steps: after a hydrogen production starting signal is received, closing a first exhaust valve; determining whether the pressure in the hydrogen-water secondary liquid separation tank is greater than a preset pressure threshold value or not, and determining whether the liquid level in the hydrogen-water secondary liquid separation tank is smaller than a first preset liquid level or not; when the pressure in the hydrogen-water secondary liquid separation tank is larger than a preset pressure threshold value and the liquid level in the hydrogen-water secondary liquid separation tank is smaller than a first preset liquid level, a first exhaust valve is opened, so that gas in the hydrogen-water secondary liquid separation tank is exhausted through a back pressure valve, and the pressure built in the hydrogen-water secondary liquid separation tank is used as driving force; and the liquid water is pressed back to the pure water storage tank through the first drain valve. According to the invention, the technical problems of hydrogen escape loss, water resource waste, high energy consumption and system complexity caused by dependence on an external water pump when high-pressure pure water containing dissolved hydrogen separated from the cathode side is recycled in the existing electrolytic hydrogen production technology can be solved.

This utility model relates to a recovery device, specifically a hydrofluoric acid tail gas recovery device, comprising a recovery tank equipped with a first cooling device. An absorption condenser is connected to the upper end of the recovery tank. The upper part of the recovery tank is connected to a workshop tail gas inlet pipe, an anhydrous hydrofluoric acid pipe, and a demineralized water pipe. The bottom of the recovery tank is connected to the input end of an absorption pump assembly via a first pipeline. The output end of the absorption pump assembly is connected to the upper part of the absorption condenser via a second pipeline. A branch pipeline connected to a hydrofluoric acid storage tank is provided on the second pipeline. This device can effectively improve the recovery and processing capacity, and the recovered hydrofluoric acid can be used as a by-product, increasing economic benefits.

This invention discloses a process for stabilizing the cooling water supply temperature of a blast furnace, relating to the field of blast furnace ironmaking equipment cooling technology. The process includes the following steps: acquiring first and second real-time operating parameters and real-time status parameters of a shared spray water system; determining the smelting load difference between the first and second blast furnaces based on the first, second, and real-time operating parameters and the real-time status parameters; generating a linkage control command when the smelting load difference meets a preset linkage trigger condition; and allocating the number of air coolers in the first and second blast furnaces to operation by adjusting the linkage control valves between the air cooler branch pipes of the first and second blast furnaces according to the linkage control command. This invention relies on the existing shared spray water system, eliminating the need for adding a large number of new spray water devices, and achieving on-demand allocation of cooling capacity only through linkage and minor equipment modifications.

This invention relates to the field of membrane separation process control technology, and provides a full-membrane method for concentrating and purifying iron phosphate by makeup water reuse regulation. The system includes a white material tank, a pre-concentration and washing unit, an intermediate white material storage tank, a washing and concentration unit, and a purified white material storage tank connected in sequence. It also includes a white material analysis module that uses solid content uniformity as a prerequisite check combined with conductivity distribution characteristics to determine the membrane inlet status into four types: normal material inlet, abnormal material flow, localized abnormal mixing, or overall high salt load. A membrane segment evaluation module assesses the effectiveness of makeup water using both desalination release degree and filtration impedance as dual indicators. Based on this, a tiered decision-making module determines the average makeup water strategy for the entire membrane segment or localized makeup water strategies and allocates makeup water to different membrane segments based on effectiveness. This system, through the coordinated control of accurate membrane inlet status identification and quantitative assessment of makeup water effectiveness, significantly reduces energy waste and concentration load caused by ineffective makeup water.

The invention belongs to the technical field of steel-making cooling water supply, provides a carbon steel continuous casting filter backwashing water treatment and recycling system and a use method thereof, and aims at treating multi-medium filter backwashing water of a carbon steel continuous casting turbid circulating water treatment system, so that the water quality of the backwashing water reaches the recycling standard, the backwashing water is recycled, and waste is turned into wealth. The treatment load of a downstream water treatment process is reduced, and the difficulty of water treatment is reduced; the water quality of downstream sewage is not too complex, the treatment is relatively simple, and the water treatment cost is reduced; the water balance of the small circulating system of the steelmaking cooling water is maintained, the water supplementing amount is reduced, the consumption of new water is reduced, the water taking cost is saved, fluorine ions in the water body are reduced, and the environment is protected.

This invention discloses a grafting propagation method for the summer wax plum 'Hongyun'. The method involves applying nitrogen fertilizer, boron fertilizer, and humic acid in the autumn of the previous year to build up energy reserves. In early March of the same year, a compound hormone of GA3+6-BA+NAA is sprayed three times. Combined with black plastic film wrapping to increase temperature and block light, black plastic film mulching to retain moisture, and ridge planting with frequent water management, the cambium layer of the wax plum rootstock and summer wax plum scion branches becomes active and ready for peeling in early spring. At this time, large-block budding is performed, resulting in high scion utilization. The buds sprout in early April, and the scions can be ready for transplanting in November of the same year. This method achieves a grafting survival rate of over 82%, which is more than 16 percentage points higher than traditional summer budding. The transplanting rate in the same year reaches 88%, the seedling cycle is shortened by one year, and the scion utilization rate is increased by 110%. This provides reliable technical support for the large-scale propagation of the rare new variety 'Hongyun'.

The utility model discloses a kind of contactless heating system based on electromagnetic technology, including heating system pipeline and the frequency conversion electronic scale removal unit connected with the outer wall of heating system pipeline;Frequency conversion electronic scale removal unit includes single-chip microcontroller control module, the control chip connected with the output end of single-chip microcontroller control module, the H bridge drive circuit connected with the output end of control chip, and the electromagnetic coil connected with the output end of H bridge drive circuit;Electromagnetic coil spiral winding is in the outer wall of heating system pipeline;Single-chip microcontroller control module is used to generate frequency-adjustable PWM square wave signal;Control chip is used to modulate PWM square wave signal;H bridge drive circuit is used to amplify modulated signal to drive electromagnetic coil to generate high-frequency alternating electromagnetic field for making the crystallization morphology of scale-forming substance in water in heating system pipeline change to form soft scale.The utility model can change the physical properties of scale-forming substance in water, realize scale inhibition and scale removal, achieve the purpose of energy saving, water saving, prolonging equipment life.