8results about How to "Guaranteed dwell time" patented technology

This invention relates to an enhanced denitrification device, specifically an enhanced denitrification device using a combined electrolysis-microelectrolysis-anaerobic process, comprising a denitrification container and an external power supply. The inner cavity of the denitrification container is divided into a wastewater treatment zone and an anaerobic water collection zone by a water collection control grid. The wastewater treatment zone has an inlet at the top, and the water collection control grid has a water collection outlet connecting the wastewater treatment zone and the anaerobic water collection zone. The anaerobic water collection zone has a sludge discharge outlet and a water outlet on its side. The wastewater treatment zone is filled with iron-carbon microelectrolysis packing material. Several electrode plates are also spaced apart within the wastewater treatment zone, with anode and cathode plates alternating. The anode plates are connected to the positive terminal of the external power supply, and the cathode plates are connected to the negative terminal of the external power supply. Compared with existing technologies, this invention solves the problems of high energy consumption in external power supply-driven electrolysis and limitations of iron-carbon microelectrolysis in existing technologies, achieving a combined use of external power supply electrolysis and iron-carbon microelectrolysis, providing enhanced denitrification capability for wastewater with a low carbon-to-nitrogen ratio and lower energy consumption.

The invention provides a system and a method for preparing mesophase pitch, the system for preparing mesophase pitch comprises a prepolymerization reactor and a continuous condensation separation reactor, the middle upper part of the continuous condensation separation reactor is provided with a feed inlet, an extraction port and an overflow port, the overflow port is positioned above the feed inlet, and the extraction port is communicated with the prepolymerization reactor. A lead-in port and a discharge port are respectively formed in the lower part and the bottom of the shell; the discharge port of the prepolymerization reactor is communicated with the feed port of the continuous condensation separation reactor through a pipeline, the overflow port is communicated with the feed inlet of the prepolymerization reactor through a pipeline, and the extraction port is communicated with the introduction port through a pipeline. According to the system and the method for preparing the mesophase pitch, the problem that continuous refining is difficult in the mesophase pitch preparation process can be solved, and the uniform quality of the obtained mesophase pitch product can be ensured.

The present application relates to the technical field of wastewater treatment device, specifically, disclose a kind of wastewater purification treatment device for phosphate production, it include: main body, first interception pipe and second interception pipe being interconnected, staggeredly installed in main body;By magnetic mutual attraction, stirring component and guide component, wherein, stirring component is movably placed in first interception pipe and second interception pipe, for stirring wastewater;Guide component is outside first interception pipe and second interception pipe, can be along the circulation movement of the distribution path of first interception pipe and second interception pipe;Driving assembly is used to drive guide component;Evaporation assembly is used to input water vapor into main body;Guide component can drive stirring component to move, improve the flow efficiency of wastewater in first interception pipe and second interception pipe, also can clean the inner wall surface of first interception pipe and second interception pipe, ensure the cleanliness of inner wall surface.

The application discloses a fabric wrinkle-removing and shaping processing equipment and belongs to the technical field of fabric processing, and aims to solve the problems of unstable guiding, inconvenient pressure adjusting, uneven ironing, untimely drying and inaccurate winding control of the existing fabric wrinkle-removing and shaping equipment, which leads to poor processing efficiency and quality. Technical scheme points are as follows: the equipment comprises a rack, a fixed plate, a bearing seat II, a driving shaft and a winding roller arranged in the rack, a guiding assembly arranged in the rack, a control cabinet and a servo motor arranged on one side of the rack, a connecting plate, a U-shaped frame and a pressing assembly arranged at one end of the rack, a side plate and two groups of ironing assemblies arranged on one side of the connecting plate, and a hot air blower arranged in the rack. The guiding assembly realizes stable fabric conveying, the pressing assembly can flexibly adjust the pressing strength, the ironing assemblies realize synchronous and uniform ironing, the hot air blower dries the ironed fabric, and the servo motor accurately controls the winding speed. The equipment realizes integrated fabric processing, is suitable for various fabrics, and improves the processing efficiency and wrinkle-removing and shaping quality.

The invention relates to the technical field of preparation processes of battery-grade lithium carbonate, and discloses a preparation system of battery-grade lithium carbonate and a preparation method of the battery-grade lithium carbonate. Comprising a pulping tank, a homogenizing pump, a first reactor, a carbonization buffer tank, a first circulating pump, a filter, an ion exchange device, a delivery pump, a second reactor, a slurry buffer tank, a second circulating pump and post-treatment equipment which are sequentially connected through a main pipeline, the first proportioning valve is connected with the pulping tank through a first return pipeline, a second proportioning valve is arranged between the first circulating pump and the filter, the second proportioning valve is connected with the first reactor through a second return pipeline, and a third proportioning valve is arranged between the second circulating pump and the post-treatment equipment; and the third proportioning valve is connected with the second reactor through a third reflux pipeline. The preparation process is simplified, the use cost is reduced, and the preparation efficiency is improved.

This utility model discloses a double-n-type compact heating furnace, belonging to the field of heating furnace technology. It includes a vertically arranged radiant section and a convection section, as well as a horizontally arranged transition section. The radiant section houses a radiant furnace tube assembly. A burner for heating the radiant furnace tube assembly is located at the bottom of the radiant section. The radiant section and the convection section are connected through the transition section to form an n-type heating furnace. The double-n-type compact heating furnace provided by this utility model, with its radiant and convection sections forming an n-type structure, not only makes the overall structure compact and eliminates the need for a complex flue at the bottom of the radiant section, but also overcomes the drawbacks of traditional top-mounted convection section furnaces being too tall and requiring extensive steel structure support, and traditional bottom-mounted convection section furnaces occupying too much space, through mutual support between the two. Simultaneously, the n-type radiant furnace tubes in the radiant section allow the process medium to flow in several n-shaped patterns within the furnace, ensuring residence time while fully utilizing the tube space and significantly improving heating efficiency.

The application discloses a kind of synergistically processing large wind volume low concentration waste gas and small wind volume high concentration waste gas incineration system and its operating method, in the method, high concentration waste gas and low concentration waste gas are not premixed in advance, set up separate incineration chamber for processing high concentration waste gas, incineration chamber is not set up regenerative bed, built-in burner, burner is high concentration waste gas as fuel, with low concentration oxygen-containing waste gas as combustion-supporting wind.Set up three regenerative incineration chambers for processing low concentration waste gas, each regenerative incineration chamber inlet and outlet are provided with lift valve, when normal operation, the opening and closing of each lift valve is controlled by time sequence, one is as air inlet chamber, one is as air outlet chamber, one is as purging chamber.In this way, it is ensured that all waste gas can be discharged up to standard, and the safety and cost optimization of operation process are ensured.The safety hazard and high energy consumption problems existing when traditional RTO technology simultaneously processes high concentration and low concentration waste gas are solved.

The present application provides a hydroformylation reaction device, a hydroformylation reaction method and application thereof. Under the hydroformylation condition, vinyl acetate and synthesis gas are reacted in a first reaction unit, the obtained liquid phase is cooled and then returned to the first reaction unit, the remaining part is sent to a second reaction unit for continuous reaction with another synthesis gas, the liquid phase obtained by the continuous reaction is sent to a gas-liquid separation unit, the separated synthesis gas is discharged, the liquid phase is sent to a separation unit for separation, the catalyst, the crude product and the solvent are separated, and the catalyst and the solvent are circulated back to the first and second reaction units respectively. The hydroformylation reaction method provided by the present application can control the return amount of the catalyst and the solvent and respectively regulate the catalyst concentration of the two reaction zones, so as to ensure the residence time and the reaction effect.