6results about How to "Less gush" patented technology

The present application relates to the technical field of gas outburst chemical agent, in particular to a kind of methane esterification agent for preventing gas outburst and its preparation method and application method, and the methane esterification agent includes acid, I2, manganese-containing oxidizing agent and iron catalyst, relative to acid, the amount of I2 is 0.035-0.040 mol / L, the amount of manganese-containing oxidizing agent is 0.15-0.2 mol / L, and the amount of iron catalyst is 0.1-0.2 g / 100 mL;The iron catalyst is Fe-loaded MWCNTs, and the iron loading in the iron catalyst is 36-53% of the amount of MWCNTs in terms of mass content.The methane esterification agent of the present application can effectively esterify methane, and the formula and preparation method are simple and easy to operate, and the methane esterification agent has small corrosion hazard effect.

The utility model relates to the technical field of kitchen equipment, in particular to a novel seafood steaming cabinet which comprises a cabinet body, a plurality of heating pipes are fixedly installed at the bottom of the cabinet body, a plurality of symmetrically-distributed supporting blocks are fixedly connected to the inner wall of the cabinet body, a steaming box is installed on the tops of the supporting blocks in a sliding mode, and the steaming box is connected with the heating pipes. A sealing door is fixedly installed at the front end of the cabinet body, a plurality of open grooves corresponding to the steaming boxes are formed in the sealing door, a recycling assembly is installed on the outer wall of the cabinet body and comprises a top cover, a first exhaust pipe, a second exhaust pipe and a demisting plate, and the top cover is fixedly connected to the top of the cabinet body; the first exhaust pipe is fixedly connected to the rear end of the top cover, and the second exhaust pipe is fixedly connected to the top of the first exhaust pipe. According to the seafood hot steam recycling device, the problem that hot steam rushes out when seafood is taken out, and workers are scalded is solved, hot steam recycling can be achieved, and resource waste is reduced.

The utility model discloses a municipal road drainage structure with an anti-backflow function, and relates to the technical field of municipal drainage engineering. The drainage well comprises a drainage well body, the top of the drainage well body is provided with a well lid, the drainage well body is internally provided with a filter port, the top of the filter port is fixedly connected with a filter screen, and the interior of the filter port is fixedly connected with a supporting rod. When sewage in the drainage well body flows back, the buoyancy of the sewage pushes a buoyancy body to drive a lifting rod to be inserted into a sleeve rod, so that the buoyancy body blocks the bottom of a filtering opening, and a transmission mechanism is matched to drive a cover plate to drive a second drainage opening and a first drainage opening to be arranged in a staggered manner; therefore, sewage in the drainage well body is prevented from flowing out of the drainage well body through the filter port, and foreign matters such as leaves filtered at the top of the filter screen are prevented from flowing out of the drainage well body through the first drainage port and the second drainage port, so that the condition of sewage backflow in the drainage well body is effectively reduced.

This invention proposes a variable diameter measuring device for positive pressure flue gas ducts, comprising an upper mounting plate, a sliding plate, and a lower mounting plate. The lower mounting plate is connected to the flue gas duct and has a first through hole in its center. After the lower mounting plate is connected to the flue gas duct, the first through hole corresponds to the position of the measuring hole on the flue gas duct. The upper mounting plate has a second through hole in its center, which is coaxial with the first through hole. The upper mounting plate is fixed to the side of the lower mounting plate away from the flue gas duct. The sliding plate is located between the upper and lower mounting plates, and its two sides are slidably connected to the upper and lower mounting plates, respectively. There are multiple sliding plates arranged circumferentially. The ends of the sliding plates near the measuring hole form mounting holes. When the sliding plates move away from the measuring hole, the mounting holes open; when the sliding plates move closer to the measuring hole, the mounting holes close. This invention realizes the variable diameter opening and closing of the measuring hole, improving the convenience and safety of the testing equipment placement.

The present application relates to the technical field of coal mining, and provides a coal mine resource collaborative mining and full-space destruction control method for surrounding rock in a mining area, comprising the following steps: determining the horizon of a low-position thick hard basic roof rock layer based on the structural parameters of a coal seam roof; determining the arrangement position and parameters of a fracturing borehole based on the horizon of the low-position thick hard basic roof rock layer; performing fracturing borehole construction, with the horizontal section of the fracturing borehole being located in the low-position thick hard basic roof rock layer and covering the entire length of the mining face in the strike direction; performing fracturing construction in the horizontal section to form fracturing cracks and controlling the development of the fracturing cracks to make the fracturing cracks penetrate the coal seam in the vertical direction; and after the fracturing construction is completed, extracting gas through the fracturing borehole. In this way, by using the fracturing of the low-position thick hard basic roof rock layer, the coal seam gas resource recovery, gas disaster control, coal mine roof / floor water disaster prevention and control, and surrounding rock control in the mining and excavation space can be simultaneously achieved, the disaster prevention and control engineering quantity is greatly reduced, the engineering cost is reduced, and the construction period is shortened.

The invention discloses a system and method for controlling corner gas by coordinating a plugging gas wall with a magnetized active agent, comprising a gas wall component and a spray component, wherein the gas wall component is arranged on a mining channel, and the spray component is arranged near the corner, and the gas wall component is used to plug the channel where the working face is located; the spray component is used to spray the magnetic surfactant into the corner area; the gas wall component comprises a gas pipeline, a pressure gauge, an air bag, a buckle, an air charging valve, a safety valve and a pressure relief hole; the air charging valve, the safety valve and the pressure relief hole are all arranged on the air bag, and each air bag is provided with a buckle ring, and the adjacent air bags are connected with the buckle ring by the buckle, and the air bags are stacked in sequence in the height direction; the system provided in the invention has a small engineering workload during construction and operation, and can be used without the need to build additional large-scale equipment, thereby simplifying the use process and being suitable for safe and efficient use by coal mine workers.