51 results about "Silica dust" patented technology

A system for controlling silica dust generated during the transfer of frac sand from a storage container through a conveyor system includes a system of conduits having a plurality of inlets for collecting silica dust generated at selected points along the conveyor system. An air system pneumatically coupled to the system of conduits generates a negative pressure at each of the inlets to induce the collection of silica dust at the selected points along the conveyor.

A system for controlling silica dust generated during the transfer of frac sand from a storage container through a conveyor system includes a system of conduits having a plurality of inlets for collecting silica dust generated at selected points along the conveyor system. An air system pneumatically coupled to the system of conduits generates a negative pressure at each of the inlets to induce the collection of silica dust at the selected points along the conveyor.

Embodiments of methods and systems of transferring proppant for fracking to reduce risk of production and release of silica dust at a well site are provided. An embodiment of a method can include positioning a plurality of containers each having proppant for fracking contained therein onto a conveyor at a well site, downwardly discharging proppant from each respective container of the plurality of containers, funneling proppant from the one or more outlets of each of the plurality of containers through a plurality of conveyor hoppers, receiving proppant onto the conveyor belt, conveying proppant on the conveyor to a chute, and depositing the proppant into the chute for use in a blender or other location at the well site.

The present invention is a dust collection assembly for capturing dust, debris and residue that is created during the process of drilling holes into a concrete ceiling. The dust collection assembly is used with a universal drill stand and a drill saddle which has an electric drill secured to it. The drill saddle further comprises a telescoping vacuum tube having a ceiling contact portion that encircles the drill bit at the portion of the drill bit where the drill bit enters the ceiling. As the drill bit begins to penetrate the ceiling, silica dust is generated and removed via the vacuum tube, which tube is connected to a vacuum source.

The invention belongs to the field of SiHCl3 treatment devices and relates to SiHCl3 synthetic tail gas treatment equipment, in particular to a SiHCl3 synthetic tail gas treatment device.The SiHCl3 synthetic tail gas treatment device comprises a bearing device.The bearing device comprises a bearing shell, a second adsorption device is arranged above the bearing device, and a first adsorption device is arranged between the second adsorption device and the bearing device.Due to the fact that the first adsorption device is arranged between the second adsorption device and the bearing device, an adsorption plate is arranged in the first adsorption device, a rack wheel is arranged outside the first adsorption device, a drive mechanism is arranged on the rack wheel, the first adsorption device can well adsorb and filter solid silica dust and high-boiling residue dust in gas in the first adsorption device, the solid silica dust and the high-boiling residue dust in the gas can be well filtered out, and pure gas, pure solid silica dust and pure high-boiling residue dust can be obtained, utilized and recovered.

The invention discloses a cold trap system for purifying and filling silane. The cold trap system comprises a plurality of cold trap tanks and liquid nitrogen dewars in the same quantity as the cold trap tanks and is characterized in that: the cold trap tanks are provided with sealed tank bodies; the top parts of the tank bodies are provided with air inlet pipes; the lateral upper sides of the tank bodies are provided with outlet pipes; the outlet pipe of one cold trap tank is connected with the air inlet pipe of another cold trap tank, so that all the cold trap tanks are connected in series; and the cold trap tanks can be sleeved in the liquid nitrogen dewars. When the cold trap system is used, the air inlet pipe of the first cold trap tank is connected in parallel with two valves; one valve is a silane valve and is connected with a silane air source, and the other valve is a vacuumizing and venting valve and is connected with a vacuumizing and venting system; and the outlet pipe of the last cold trap tank is connected with a busbar; and all the outlets of the busbar are connected with silane cylinders to be filled with the silane. The cold trap system adopts the cold trap tanks connected in series, fills the silane at low temperature, has the function of purifying gas, can effectively purify silane gas, prevents silica dust, and ensures the safe and normal operation of filling systems.

Polycrystalline silicon of the invention contains: (a) polycrystalline silicon fragments, wherein at least 90% of the fragments have a size from 10 to 40 mm, (b) <15 ppmw of silicon dust particles having particle sizes <400 μm; (c) <14 ppmw of silicon dust particles having particle sizes <50 μm; (d) <10 ppmw of silicon dust particles having particle sizes <10 μm; (e) <3 ppmw of silicon dust particles having particle sizes <1 μm; and (f) surface metal impurities in an amount ≦0.1 ppbw and ≧100 ppbw. A polycrystalline silicon production method of the invention includes fracturing polycrystalline silicon deposited on thin rods in a Siemens reactor into fragments; classifying the fragments by size; and treating the fragments with compressed air or dry ice to remove silicon dust from the fragments without wet chemical cleaning.

The invention discloses concrete mainly prepared from waste glass. The concrete is prepared from the following components in parts by weight: 10-30 parts of gel material, 30-40 parts of fine aggregate, 40-50 parts of coarse aggregate, 0.05-0.45 part of admixture and 3.8-16.5 parts of water, wherein the gel material comprises the following components in percentage by weight: 70-85wt% of cement, 10-20wt% of waste glass micropowder with the particle size being less than or equal to 30 micrometers and 5-10w% of silica dust; the fine aggregate is zone-II medium sand grading class waste glass powder, and the coarse aggregate is stones with the particle size being 5-16mm. The waste glass is utilized in the concrete to the maximum degree, and the cement has excellent compressive strength and mobility. The invention also provides a concrete preparation method.

A dust suppression system for a jack hammer includes a spraying device that applies a fluid spray to an area surrounding the jack hammer. The spraying device includes a bracket connected to the jack hammer and a nozzle that creates the fluid spray. The system also includes a fluid source and a pump in fluid communication with the fluid source and the spraying device. The pump directs fluid from the fluid source to the spraying device. The bracket directs fluid from the pump and the fluid source to the nozzle.

A system for controlling dust during hydraulic fracturing operations includes a manifold having a plurality of ports for capturing dust when negative air pressure is applied to the manifold. A support frame positions the manifold above a piece of hydraulic fracturing equipment receiving sand from a sand source.