9results about How to "Improve concentration uniformity" patented technology

The present invention relates to the technical field of ozone generators, and more specifically, to an ozone generator with a concentration adjustment function. The ozone generator comprises a box body and an ozone generating module arranged inside the box body. An exhaust plate is provided for sliding inside the box body near the open end. An exhaust grille is provided on the surface of the exhaust plate. The exhaust plate is used to slide in a sealed manner inside the box body through a power component to change the space capacity of the box body. Exhaust guide components are provided near the four edges of the outer surface of the exhaust plate. When the exhaust plate slides inside the box body, the four exhaust guide components gather inward, so that ozone is gathered and discharged from the box body. The exhaust plate of the present invention slides inside the box body to compress the ozone storage space. At the same time, it drives the exhaust guide components to gather inward, so that ozone is gathered and discharged, so that the ozone concentration is further increased, and the ozone with high concentration is specially purified toward a certain environment with the help of the exhaust guide components, thereby improving the air purification efficiency.

This invention belongs to the field of quartz glass preparation technology, and discloses a blowtorch for quartz glass preparation and a method for preparing quartz glass. The blowtorch for quartz glass preparation includes a raw material chamber, a first annular oxygen chamber, an annular hydrogen chamber, and at least two first mounting chambers. Each first mounting chamber is provided with a first adjusting tube, which extends into the annular hydrogen chamber. The first adjusting tube includes a first straight tube and a second straight tube, with the second straight tube fixed to one end of the first straight tube and inclined relative to it. Multiple first adjusting tubes are selectively arranged in the same first mounting chamber, and the inclination angles of the second straight tubes relative to the first straight tubes are all different. This invention, without changing the basic structure of the blowtorch for quartz glass preparation, can flexibly adjust the coverage area of ​​the oxyhydrogen flame, making the temperature distribution on the deposition surface more uniform, improving the uniformity of hydroxyl concentration, and thus improving the optical uniformity of the product.

The present application relates to the technical field of detection device, specifically to a chloroacetic acid specific gravity testing device and testing method, which comprises a rack, the inner wall of the rack is fixedly installed with an inner cylinder arranged vertically, the inside of the inner cylinder is sequentially provided with a sample storage cavity, a liquid distribution cavity, a liquid storage cavity and a waste discharge cavity from top to bottom, the inside of the liquid storage cavity is installed with a liquid feeding module, the circumferential surface of the inner cylinder is fixedly installed with a group of testing mechanisms arranged in a circumferential array, the circumferential surface of the inner cylinder and the position above the testing mechanisms are slidingly connected with a lifting ring, the upper part of the inner cylinder is fixedly installed with a vertical screw rod driving module, and the circumferential surface of the screw rod driving module is drivingly connected with the lifting ring. The present application has the beneficial effect that the single-station monitoring structure of the traditional specific gravity testing device is changed into a multi-station detection structure through the arrangement of multiple testing mechanisms, and multiple testing mechanisms can simultaneously perform specific gravity detection of the same testing liquid in the same detection mode during work.

The invention relates to the technical field of aluminum ash treatment, and discloses an electrolytic aluminum hazardous waste aluminum ash treatment process which comprises the following steps: step 1, collecting and pretreating aluminum ash; 2, physical separation; step 3, chemical leaching; step 4, ammonia water recovery and concentration; step 5, precipitation reaction; and step 6, roasting treatment. According to the method, the concentration of the aluminum ions is monitored in real time and is ensured to be within the range of 0.1-0.5 mol / L, the stable concentration of the aluminum ions in the ammonia water is kept, in the fourth step, the ammonia gas is collected by adopting a spray tower, the ammonia water is concentrated through a membrane separation technology, selection of the membrane separation technology and operation conditions are optimized, the concentration uniformity of the ammonia water is further improved, and the concentration uniformity of the ammonia water is further improved. In the third step, sodium hydroxide with the concentration of 3-5 mol / L is used for leaching, the reaction temperature is controlled to be 60-80 DEG C, the reaction lasts for 2-4 hours, the concentration of aluminum ions is kept to be 0.1-0.5 mol / L, and the beneficial effect that ammonia water enrichment is uniform and stable in the large-scale electrolytic waste aluminum denitration treatment link is achieved.

The application discloses a kind of jet structure and plasma etching machine.The jet structure includes air inlet pipe cover, can be communicated with gas source;Jet member is detachably connected with air inlet pipe cover, and jet member and air inlet pipe cover form accommodating space after being connected;Gas path switching member is movably arranged in accommodating space;Wherein, gas path switching member is provided with gas through hole group, jet member is provided with jet hole group, the number of gas through hole group and jet hole group is multiple group, and each group of jet hole group corresponds a group of gas through hole group, the jet direction of each group of jet hole group is different, based on the movable setting of gas path switching member, the conduction of jet hole group and its corresponding gas through hole group can be switched to the conduction of another jet hole group and another gas through hole group.The jet structure can realize multiple direction jet, with the continuity movement of gas path switching member, the jet structure can also realize the periodic jet of multiple directions, improve plasma concentration uniformity, so that the uniformity of plasma etching is improved.

The utility model discloses a silicon carbide epitaxial wafer growth carrying disc, which comprises a main body carrying disc, a heat insulation ring and a graphite ring, the middle part of the main body carrying disc is convexly provided with an inner ring convex ring, the heat insulation ring is provided with a circular ring-shaped supporting part, the supporting part is arranged above the inner ring convex ring, the graphite ring is arranged at the edge position of the main body carrying disc, and the graphite ring is arranged above the inner ring convex ring. And the top of the graphite ring is higher than the top of the heat insulation ring. During epitaxial growth, the substrate is placed on the supporting part of the heat insulation ring, and the silicon carbide substrate is isolated from direct contact with the main body carrying disc through the heat insulation ring, so that a solid heat transfer path is isolated, and epitaxy is carried out only by using gas heat transfer and heat radiation as an epitaxy heat source, so as to obtain a more uniform temperature field; the epitaxial wafer has better concentration uniformity, and the quality of the silicon carbide epitaxial wafer is improved.

This utility model discloses a coagulation tank with a flow guiding structure, relating to the field of composite diaphragm production equipment. By setting inlet and outlet at the bottom of the tank, and cooperating with inlet guide plates, outlet guide plates, and diaphragm flow field protection guide plates, the horizontal flow field is transformed into a vertical flow field, reducing the impact on the composite diaphragm and solving the problems of uneven diaphragm thickness and unstable surface resistivity in the prior art. This utility model has a simple structure, can significantly improve the preparation quality of composite diaphragms, and is suitable for the industrial production of composite diaphragms for alkaline electrolytic cells.

The utility model provides a dry-mixed mortar filling machine, which relates to the technical field of dry-mixed mortar filling machines, and comprises a processing box, the bottom end of the processing box is fixedly connected with a bearing plate, the bottom end of the processing box is movably connected with a sealing cover, the middle of the sealing cover is connected with a limiting disc in a penetrating manner, and the top end of the limiting disc is fixedly connected with a protective shell. Two sets of sliding grooves are formed in the surface of the protective shell, through cooperation of a rotating motor, a gear and a bevel gear, the rotating motor is started to enable the gear and the bevel gear to rotate, then a vertical shaft and a rotating shaft can work while the gear rotates, and the using effect of the whole equipment is further improved; and an adjusting block moves along the interior of a sliding groove, operation adjustment can be conducted on a stirring blade, bonded mortar can be stirred conveniently, and the uniformity degree of the concentration of the stirred mortar is improved.

The invention relates to the technical field of stem cell extraction, in particular to a plant stem cell extraction method. Comprising the following steps: SS01, grinding, taking freeze-dried plant tissues, carrying out fine grinding and wall breaking to obtain tissue fine powder, S02, extracting, putting the tissue fine powder obtained in the step SS01 into a subcritical extractor, extracting to obtain an extraction mixed solution, SS03, purifying, separating and purifying the extraction mixed solution obtained in the step SS02 to obtain a tissue stock solution, SS04, preparing a stock solution, sS03, carrying out centrifugal separation on the tissue stock solution obtained in the step SS03, taking a lower turbid solution to obtain a stem cell stock solution, SS05, extracting, and carrying out sampling extraction on the stem cell stock solution obtained in the step SS04 by using plant stem cell extraction equipment in different periods, in different regions and in different times. The stem cell extraction equipment disclosed by the invention has the beneficial effects that during sampling, through the arrangement of structures such as the back-cleaning pipe, the back-cleaning flow channel and the back-cleaning hole, the stem cell extraction equipment can realize self-cleaning of the extraction equipment when the stem cell extraction equipment is used for sampling in different regions and times or in different times.