6results about How to "Avoid scour wear" patented technology

The present invention proposes a desulfurization slurry spraying device, which is composed of more than two spraying layers, and the spraying layers are arranged in sequence from top to bottom in the desulfurization tower. The spraying layers include a main mother pipe, a support beam, a secondary mother pipe, a branch pipe, a first nozzle and a second nozzle. The main mother pipe is supported by a support beam, and both ends of the support beam are fixed on the tower wall of the desulfurization tower. The two sides of the main mother pipe are connected to a plurality of secondary mother pipes, and the two sides of the secondary mother pipe are connected to a plurality of branch pipes, and the branch pipes are not terminated with nozzles. The nozzles include a first nozzle or a second nozzle. The adjacent two spraying layers are composed of an upper spraying layer and a lower spraying layer. The main mother pipe of the lower spraying layer and the main mother pipe of the upper spraying layer have an angle β in the top view projection. The spraying device can basically solve the phenomenon of flue gas escaping along the wall, improve the desulfurization rate and dust removal rate, appropriately reduce the liquid-gas ratio, and meet more stringent environmental protection requirements.

The invention discloses a cathode protection method for an aluminum electrolysis cell, which solves the problem of serious non-uniform abrasion of a cathode caused by physical abrasion and electrochemical corrosion of the aluminum electrolysis cell, and adopts the technical scheme of implementing integral protection on a cathode abrasion area. The cathode protection frame is arranged above the cathode abrasion area, the filling material is arranged in the cathode protection frame, the flow speed of molten aluminum in the cathode abrasion area is reduced by means of the flow choking characteristic of the cathode protection frame, a material sediment accumulation protection layer is formed above the cathode abrasion area, a cathode is protected against erosion abrasion of the molten aluminum, and the service life of the cathode is prolonged. And the current density, the temperature and the aluminum carbide generation speed of a cathode abrasion area are reduced, the cathode abrasion deepening process is delayed, and the purposes of prolonging the safe operation life of the electrolytic cell and reducing the solid waste discharge amount are achieved.

This utility model relates to the field of boiler desulfurization conveying technology, specifically disclosing a boiler desulfurization conveying device based on multi-point distribution and multi-stage diameter variation synergistic optimization. The device includes a first main conveying pipe, one end of which is connected to a transmitter in a limestone compartment. This boiler desulfurization conveying device, based on multi-point distribution and multi-stage diameter variation synergistic optimization, constructs a multi-stage gradually narrowing conveying channel through conical diameter variations in the first, second, and third main conveying pipes. When limestone powder enters the conical section of the first main conveying pipe, the gradual contraction of the pipe cross-section accelerates the gas-solid two-phase flow, forming a stable jet that enters the second main conveying pipe. The flow velocity is further optimized through the conical transition section of the second main conveying pipe, and finally, the conical structure of the third main conveying pipe completes the three-stage acceleration process. This avoids limestone powder accumulation caused by a single pipe diameter and reduces pipe wear.

The utility model discloses a pH measuring device for a desulfurizing absorption tower, which comprises the desulfurizing absorption tower and a pH electrode measuring cell, and the desulfurizing absorption tower is communicated with the pH electrode measuring cell through an introduction pipe; a pH electrode is arranged in the pH battery measuring cell, is fixed at the top of the pH electrode measuring cell and is inserted into the slurry of the pH electrode measuring cell; an outflow opening is formed in the tower wall of the bottom of the desulfurizing absorption tower, and a leading-in pipe is downwards and obliquely led into a leading-in opening in one side wall of the pH battery measuring cell from the outflow opening; the horizontal height of the outlet is higher than that of the inlet; and the other side wall of the pH battery measuring cell is provided with an overflow port. According to the invention, 24-hour uninterrupted sampling is realized, erosive wear of a pH electrode glass bulb caused by high outlet pressure of a gypsum removal pump is avoided, the service life of the electrode is prolonged, and time, space and temperature consistency of manual sampling and system automatic sampling is also realized.

The application discloses a circulating fan for dry quenching system and relates to the field of circulating fans, which comprises a fan shell, an air inlet, an air outlet, an air inlet flange, a cleaning cylinder arranged at the air inlet of the fan shell, a filter cylinder arranged in the cleaning cylinder, wherein the filter cylinder is in the shape of a truncated cone, the smaller end of the filter cylinder is arranged away from the fan shell, and a wind guide cylinder corresponding to the filter cylinder is arranged at the end of the cleaning cylinder away from the fan shell; and a dust collecting unit is arranged at the end of the filter cylinder close to the fan shell, which is used for collecting and treating the impurities filtered out. The cleaning cylinder with the filter cylinder in the shape of a truncated cone is arranged at the air inlet of the fan, the coke powder and dust impurities in the circulating gas are completely filtered out before entering the fan shell through the front filter structure, the problems of the erosion and abrasion of the fan impeller and the internal flow channel and the flow channel blockage caused by the dust are avoided from the root, the operation failure rate of the fan is significantly reduced, and the service life of the whole machine is prolonged.

The utility model relates to the technical field of boiler sewage treatment, and discloses a boiler blow-down water heat recovery device which comprises a shell, a water inlet and a water outlet are formed in the shell, a plurality of heat exchange pipes are arranged in the shell in parallel, and every two adjacent heat exchange pipes are connected in an end-to-end communication mode. A filter screen cylinder is arranged in each heat exchange tube, the head end of each filter screen cylinder is open, and during working, sewage enters the filter screen cylinders from the openings of the filter screen cylinders and is discharged from the side parts of the filter screen cylinders; a water inlet pipe and a water outlet pipe which are communicated with the heat exchange pipes at the head and the tail are respectively arranged on the shell; according to the heat recovery device, the heat recovery effect can be guaranteed, meanwhile, dirt in sewage can be filtered in time, damage to the inner wall of the pipeline due to dirt washing is reduced, meanwhile, the probability that the interior of the pipeline is blocked is reduced, and the convenience of cleaning the pipeline is improved.