31results about How to "Increase velocity gradient" patented technology

The invention discloses a method for preventing an ice-slurry preparing device adopting a super-cooling method from generating ice blockage and a device thereof. An ice-making fluid firstly flows through a fluid pulsation generating device before entering a super cooler, so that flow and pressure of the ice-making fluid generate pulsation; then, the fluid is cooled and super-cooled in the super cooler, and velocity gradient near the wall surface of the super cooler is increased by virtue of the fluid pulsation, so that fluid shearing force is increased, and ice crystal particles are prevented from being adhered on the surface of the super cooler, thereby preventing ice blockage. The device comprises a pulsation generating device, a flow meter, an ice slurry generating device, an ice storage slot, an ice crystal filter device and a related valve. According to the device, the pulsation generating device is mounted in front of the super cooler, so that on one hand, pulsation of the fluid in the super cooler is reinforced, a heat exchange coefficient is increased, formation of an ice layer is avoided, heat exchange thermal resistance is reduced and heat exchange efficiency of the super cooler is integrally improved; and on the other hand, the problem that an ice slurry generating process adopting the super-cooling method is liable to generate ice blockage is solved.

The invention relates to a device and method for promoting interaction of fine particles in smoke of a coal-fired boiler.The device is characterized by comprising a rectangular channel, a shrinking and expanding throat, a turbulence clustering chamber and a smoke outlet, the rectangular channel serves as a smoke inlet, the shrinking and expanding throat comprises a gradually-shrinking part and a gradually-expanding part, the gradually-shrinking part is connected with the rectangular channel, the gradually-expanding part is connected with one end of the turbulence clustering chamber, and the smoke outlet is formed in the other end of the turbulence clustering chamber and connected with a subsequent dust removing device; a plurality of rectangular fins are arranged in the turbulence clustering chamber, every two rectangular fins form a set, n sets of fins are arranged, n is larger than or equal to 2, the two rectangular fins of each set are in a splay shape, the small opening end of the splay shape faces the smoke flow incoming direction, and the n sets of rectangular fins are sequentially arranged in the turbulence clustering chamber in the smoke flow incoming direction; an included angle ranging from 20 degrees to 60 degrees is formed between the rectangular fins and the smoke flow incoming direction, and the proportion of the length, in the width direction, of the turbulence clustering chamber to the diameter of the throat part of the shrinking and expanding throat is 6:5.

The invention discloses an oxygen supply device for aquaculture, which belongs to the technical field of aquaculture, and comprises a breeding box. The top of the breeding box is provided with an inwardly recessed chute, and the inside of the chute is movably connected to a water collection tank. There are several mesh holes, an oxygen increasing device is installed on the upper surface of the partition, an air compressor and a circulation pump are respectively arranged on the left and right sides of the breeding box, and the air compressor and the circulation pump are located above the supporting frame. The device supplies oxygen in layers to meet the oxygen demands of different aquatic products, can increase the oxygen concentration in the aquaculture water, and can also filter impurities in the water, so that the aquaculture water can be recycled.

The invention belongs to the technical field of stirring paddles, and discloses a through-flow stirring paddle. The through-flow stirring paddle includes a stirring shaft, a disc and a paddle, the center of the disc is sleeved on the stirring shaft, the paddle is arranged on the disc along the circumferential direction, and the surface of the paddle is provided with a through-flow hole, and the surface of the paddle is It is a wavy structure. During the rotation of the high-efficiency through-flow stirring paddle of the present invention, after the fluid passes through the through-flow hole, many high-speed jets will be formed behind the blades of the wave-shaped structure, and impact flows will also be formed, which destroys the periodic motion of the fluid in the mixing isolation area. Therefore, the velocity gradient of the fluid in the stirring tank is increased, the mixing effect of the materials is improved, the mixing time of the materials is shortened, and the stirring efficiency is higher than that of the existing stirring equipment.

The invention relates to the improvement of a separation inclined pipe and a clarifying / precipitating device for clarifying and precipitating in a water treatment process, which is characterized in that parallel opposite wave plates which form an inclined pipe are oppositely and adjacently arranged at intervals; the adjacent space is provided with separated inclined plate strips which are arranged up and down at intervals; and the water inlet and outlet of the inclined pipe and the separated inclined plate strips are parallel or approximately parallel. Compared with the mud-water separation of an incongruous flow of the existing inclined plate and inclined pipe, the inclined pipe provided by the invention has higher surface load, higher mud-water separation efficiency and better mud-water separation effect and can effectively separate tiny suspended matters which can not be precipitated and separated originally, the quality of the separated water is better, the muddy matters are removed completely, and the treatment is more stable. The clarifying / precipitating device provided by the invention can enhance the efficiency by above 30% and can obviously improve the water quality. The invention adopts grid turbulence flocculation, can be beneficial to improvement of the quality of the clarified / precipitated water and can realize basically powerless flocculation. The separation inclined pipe and the clarifying / precipitating device provided by the invention can be used for clarifying in various water supply treatments and recycled water treatments and for precipitating in sewage treatment.

The invention discloses a stirring tank and relates to the technical field of stirring devices. The stirring tank includes a tank body, a stirring shaft, paddles and baffles, the tank body is used to hold materials to be stirred; the axis of the stirring shaft coincides with the axis of the tank body; the paddles are arranged on the stirring shaft; the baffles are arranged on Inside the tank and located on the outer periphery of the stirring shaft, the baffle plate is provided with flow holes, and the cross section of the baffle plate is wavy. In the stirring tank of the present invention, during the stirring process of the paddle, the fluid passes through the through-flow hole to form many high-speed jets. Since the cross section of the baffle is wavy, the high-speed jets will collide with each other after passing through the baffle to form a collision flow. Therefore, the velocity gradient of the fluid in the baffle area in the stirring tank is further increased, the flow condition in the flow stagnation area behind the baffle is improved, the mixing effect of the fluid is improved, and the stirring efficiency of the stirring tank is improved.

The invention discloses a V-shaped high-efficiency clarifier, which belongs to the technical field of water treatment, and aims to solve the problems of large occupied space and low clarification efficiency of clarifier tanks in the prior art, and provide a clarifier with small space occupation and higher water clarification efficiency. high clarifier. The present invention comprises a clarification tank body, the upper end and the bottom of the clarification tank body are respectively provided with a water inlet pipe and a mud discharge pipe, and the top of the clarification tank body is provided with a plurality of partitions to divide the clarification tank body into a flocculation area and a clarification area, and the flocculation area is set in the clarification area. On the outside of the clarification zone, there is an inclined pipe sedimentation zone on the top of the clarification zone, and an opening is set on the bottom of the clarification zone, which is connected with the flocculation zone. The present invention is also provided with zigzag flocculation corridors, so that the flocculation is highly efficient, the floor space is saved, and the clarification effect is excellent.

A built-in screw type pulsating cyclone. The main purpose is to provide a cyclone separation device with high separation efficiency, small device size and convenient operation and maintenance. It is characterized in that: a discontinuous screw rod is built in the center of the cyclone separator, and the discontinuous screw rod is a hollow structure, which is composed of a helical section and an opening section distributed at intervals. The direction of the swirling flow behind the device is opposite; a backwash circular tube is nested inside the intermittent screw rod, and the opening section on the backwash circular tube corresponds to the opening section of the intermittent screw rod. The top opening of the hollow part of the screw rod and the backwashing tube is connected with the overflow port of the cyclone. Through the opening section of the screw rod and the backwashing tube, the liquid can enter the inner hollow part and move upward through the overflow port. Drain the cyclone. This cyclone can effectively solve technical problems such as small density difference between two-phase media, high viscosity of separation medium and low separation precision.