5results about How to "Meet emissions" patented technology

The invention discloses an environment-friendly silicon material surface cleaning reagent and a preparation method thereof, the environment-friendly silicon material surface cleaning reagent comprises hydrofluoric acid, citric acid, EDTA tetrasodium, 1-hydroxyethylidene-1, 1-diphosphonic acid and pure water, and the environment-friendly silicon material surface cleaning reagent is characterized in that the citric acid accounts for 20-25%, the hydrofluoric acid accounts for 4-5%, the EDTA tetrasodium accounts for 0.5-1%, the 1-hydroxyethylidene-1, 1-diphosphonic acid accounts for 0.5-1%, and the pure water accounts for 0.5-1%. The proportion of the hydroxyethylidene diphosphonic acid is 0.5%-1%, the proportion of the pure water is 70%-73%, the chemical formula of the hydrofluoric acid is HF, the chemical formula of the citric acid is C6H8O7, the chemical formula of the EDTA tetrasodium is C10H12N2Na4O8, the chemical formula of the hydroxyethylidene diphosphonic acid is C2H8O7P2, and the chemical formula of the pure water is H2O. According to the environment-friendly silicon material surface cleaning reagent and the preparation method thereof, citric acid is used as a main material, HF and the chelating agent are matched, metal pollutants and surface oxides in a silicon material are removed, meanwhile, the reagent does not contain substances which chemically react with the silicon material, raw material loss is effectively avoided, and the raw material utilization rate is increased.

This invention relates to the field of environmental protection technology and discloses a denitrification reactor and a method for flue gas denitrification. The denitrification reactor includes an outer shell and an inner liner. Superheated steam is introduced between the outer shell and the inner liner to heat the inner liner. The inner liner is further divided into a baffled mixing zone and a catalytic reaction zone. The flue gas is first heated to the temperature required for the catalytic reaction in the baffled mixing zone, and then enters the catalytic reaction zone to react. The catalytic reaction zone is always at a high temperature, which prevents the formation of ammonium salts that cover and block the fiber pores of the tube wall during the denitrification process. Furthermore, the heat utilization is more efficient. The three processes of flue gas heating, denitrification reaction, and dust removal can be completed with a single device. It can simply and quickly heat, denitrate, and remove dust from the flue gas to meet emission requirements. The operation is simpler, the denitrification index is stable, and the equipment has a long service life, making it more suitable for industrial applications.

The utility model discloses a roof drainage siphoning device which comprises a drainage siphoning mechanism, the drainage siphoning mechanism comprises a flow guide sleeve, an installation ring is installed at the upper end of the flow guide sleeve, a retaining ring is installed above the installation ring, and a plurality of first partition pieces and second partition pieces are installed between the installation ring and the retaining ring. A central sealing disc is mounted on the inner sides of the first partition pieces and the second partition pieces, and drainage gaps are formed between the mounting ring and the central sealing disc and between the retaining ring and the central sealing disc; a drainage vertical pipe is installed below the flow guide sleeve, a self-adaptive full-flow mechanism is installed between the flow guide sleeve and the drainage vertical pipe and comprises a connecting pipe, a second limiting ring is installed on the inner side of the connecting pipe, and a supporting spring is arranged on the upper end face of the second limiting ring. According to the utility model, roof accumulated water is drained and divided, so that the full flow state in the drainage process is effectively kept, the siphon effect is further realized, and the drainage efficiency of the accumulated water is improved.

This invention belongs to the field of powder coating technology and discloses an environmentally friendly explosion-proof powder coating for simulating the feel of marble with stone texture and its preparation method. The coating is composed of environmentally friendly polyester resin, micron-sized hard phase inorganic filler, submicron-sized soft phase inorganic filler, light-colored semi-conductive inorganic phase, environmentally friendly color paste, aminosilane coupling agent, titanate coupling agent, low-migration acrylic leveling agent, polyethylene wax powder, and curing agent. By controlling the specific particle size distribution and flow level, the surface roughness Ra of the coating film is achieved to be 3-8 μm, and the coefficient of friction is 0.65-0.85, giving it a stone-like feel. At the same time, the light-colored semi-conductive inorganic phase is used to construct microscale charge discharge channels, significantly reducing the risk of dust explosion. The preparation method includes raw material premixing, melt extrusion, cooling and pressing, and crushing and grading. The resulting coating has good simulation, explosion-proof performance, and construction adaptability.

This invention discloses a pressure differential-driven passive discharge valve, belonging to the field of valve technology. The discharge valve includes a discharge valve pipe, a valve, a vent, a pneumatic component, an elastic rope, a metal bellows, a slider, a trigger, a trigger shaft, and an anti-rotation rod. The valve is rotatably mounted inside the discharge valve pipe. The vent connects the discharge valve pipe to the pneumatic component. The elastic rope connects the valve to the inner wall of the discharge valve pipe for energy storage. The pneumatic component is driven by the metal bellows. The slider engages with the lever-shaped trigger, which rotates around the trigger shaft and engages with the valve's unlocking part. When the discharge valve pipe is breached, air enters the pneumatic component through the vent. When the pressure inside the cavity reaches a set value, the metal bellows is compressed, causing the slider to actuate the trigger and unlock the valve. The elastic rope drives the valve to rotate to the normally open position defined by the anti-rotation rod. This invention requires no external power, relying on pressure differential to achieve passive opening, resulting in reliable operation and rapid response.