562results about How to "Easy to realize automatic control" patented technology

The invention relates to a positive-pressure pneumatic conveying skid for an oilfield fracturing propping agent. The positive-pressure pneumatic conveying skid for the oilfield fracturing propping agent comprises a skid frame and is characterized in that a fan power-driven system, a gas channel and sand conveying system, a delivery tank assembly, movable feeding devices and an electric control system are arranged on the skid frame. The positive-pressure pneumatic conveying skid for the oilfield fracturing propping agent has the benefits as follows: the occupied area is small, the transportation is convenient, the operation environment and the operation safety are improved, and the efficiency of operation for conveying a material to a high storage tank is improved.

The invention relates to an ultrasonic flotation method and a device and application thereof, which comprise the following steps: arranging an ultrasonic device in or outside a floatation tank body, starting the ultrasonic device when the floatation device carries out the mineral floatation, using ultrasonic waves to irradiate floatation pulp, providing a high-energy elastic mechanical wave to the pulp, initiating an ultrasonic cavitation effect, generating a large number of cavitation bubble particle flows which flow at high speed, and effectively washing the surfaces of the ore particles in the pulp to enable target ore particles to expose the fresh surfaces; at the same time, using ultrasonic energy to improve the activity of medicament in the pulp, quickening adsorption process of the medicament and the surfaces of the target ore particles to further improve the effects of breaking, restructuring and floating of mineralized bubbles in a pulp system, and thus realizing the optimization of flotation process.

An apparatus for preparing the semi-solid molten body of iron and steel is composed of a special container for molten iron or steel, temp regulator, stirrer and bottom vibrator. The linear layer of said special container contains nucleation promoter. Its method includes pouring the molten iron or steel at the temp which is 5-10 deg.C, higher than the temp of liquid-phase line into said special container, and stirring or vibrating for 1-10 min.

The invention relates to a refrigeration and freezing device and a drawer assembly thereof. The drawer assembly comprises a barrel body with the front side opened, a drawer capable of being inserted into the barrel body in a front-and-back push-and-pull manner and an electric control lock mechanism. The electric control lock mechanism is configured to be controllably switched to a locking state so as to lock the drawer to the barrel body or switched to an unlocking state so as to relieve locking on the drawer when the drawer is completely pushed into the barrel body. The electric control lock mechanism is provided with an unlocking button protruding and extending downwards, and the unlocking button is configured to be capable of enabling the electric control lock mechanism to be switched to the unlocking state from the locking state when pressed upwards. According to the refrigeration and freezing device and the drawer assembly thereof, the drawer and the barrel body can achieve automatic locking and unlocking, user operation is facilitated, and the drawer can still be unlocked when the electric control lock mechanism is powered off or breaks down.

The present invention is one kind of excavator and one kind of sand dredging boat, and relates to underwater sand excavation. The excavator is one sand dredging balance wheel with oscillating hydraulic cylinder to drive one balance wheel and the sand dredging board on the balance wheel to rotate reciprocally and periodically for cutting sand. The sand dredging boat includes one mechanical and hydraulic driving system and one conveying chain belt on the boat, and one sand dredging balance wheel in water. The present invention is superior to available chain-bucket sand dredging boat, and has separated excavating assembly and conveying assembly, hydraulic driving, 5-10 times raised production efficiency and easy control.

The invention discloses a direct steel making technique by reducing iron ore with gas, comprising: firstly, adding iron ore and prereducing mineral powder into an iron slag bath, dissolving the iron ore or the prereducing mineral powder into the slag, blowing reducing gas into the slag layer, reducing the slag containing FeO, and obtaining molten steel with carbon content less than 1.3%. CO generated in the reduction reaction is mainly used for secondary combustion to compensate heat energy needed by the reduction reaction, and the exhaust gas is used for prewarming and prereducing (the iron mineral is prereduced in very weak reducing atmosphere). The technique fully utilizes the features that the reducing gas will not carburize and siliconize the molten steel, and implements the production of molten steel from iron mineral only by one direct steel-smelting furnace. The technique of the invention has advantages of high yield, low energy consumption per ton steel, save of equipment andconstruction investment, sufficient simplification of physical distribution, and the technique avoids temperature loss of the molten iron in transport process, and easily implements continuous production and automation control.

The invention relates to a device of a boiling chlorination furnace for continuous slagging and a slagging method. The device is formed by a slagging pipe, a slagging valve, a water cooling spiral deslagging machine and a slagging tank that are sequentially connected through pipelines, the slagging valve comprises a vertical tube and a material discharge chamber that are in parallel, the material discharge chamber is communicated with the vertical tube through a hole at the bottom of the material discharge chamber, a material discharge opening is arranged at the upper part of the material discharge chamber, and the vertical tube and the bottom of the material discharge chamber are respectively provided with an air inlet. Slag forms stock columns in the vertical tube so that the device automatically seals, therefore, gas in the boiling chlorination furnace is prevented from leaking, slagging discharge rate is controlled through nitrogen flow regulation, and regulation and control of chlorination slagging rate are realized. According to the device, the boiling chlorination furnace realizes continuous slagging through a sealing and controllable manner without using a mechanical valve, therefore, the chlorination furnace is effectively prevented from leaking gas in the slagging process. The device has the advantages of being good in sealing performance, simple in operation, safe and reliable, easy to realize automatic control and the like.

The invention discloses a method for preparing chromium salt. The method is characterized by comprising the following steps: sufficiently and uniformly mixing a raw material containing chromium oxide (chrome ore or chromium slag) with sodium carbonate, carrying out oxidizing roasting at the roasting temperature of 900-1100 DEG C for 0.5-2.5 hours in an atmosphere with the oxygen content of higher than 20% by using microwaves as a heat source, leaching the roasted product with water, and preparing chromium salt from the leach solution. The chemical analysis on the clinker and leaching slag indicates that the insoluble waste slag contains less than 5% of chromium (on the basis of chromic oxide). The method reduces the chromium content in the discharged chromium slag, enhances the chromium utilization ratio in the chromium salt production process, effectively saves the chrome ore resources, and has obvious advantages of resource saving and environmental protection by using the microwaves as the heat source instead of the traditional coal and natural gas heating.

The invention provides an underground state determination method and device and a state control method and device. The underground state comprises an overflow state, a leakage state and a non-overflow and non-leakage state. The underground state determination method comprises collecting pumped drilling liquid flow parameters and real-time flow parameters of the returned drilling liquid, wherein the real-time flow parameters comprise the instantaneous quality, the instantaneous volume flow and the density of the drilling liquid; determining the instantaneous quality, the instantaneous volume flow and density change values of the pumped drilling liquid and the returned drilling liquid according to the pumped drilling liquid flow parameters and the flow parameters of the returned drilling liquid; determining the real-time underground state according to the instantaneous quality, the instantaneous volume flow and the density change values of the pumped drilling liquid and the returned drilling liquid. According to the underground state determination method and device and the state control method and device, the three parameter methods are matched with each other, meanwhile the influence of the time is considered, the instantaneous analysis, the static correction and the long time observation are performed on the parameters, and accordingly the accuracy of the judgment result can be ensured.

The invention discloses a continuous steel making process for iron ore, which comprises the following steps: by adopting a direct carbon reduction mode of liquid iron oxide, adding the iron ore or pre-reduced ore powder into slag iron bath in advance, dissolving the iron ore or the pre-reduced ore powder to form slag, then using carbon to quickly reduce the liquid iron oxide to obtain liquid iron,next blowing oxygen at the other end of a furnace to remove the carbon so as to obtain molten steel, namely realizing iron mineral addition and molten steel production in the same furnace. CO produced in the reduction reaction is mainly used for secondary combustion to compensate the heat required by the reduction reaction, and the waste gas is used for pre-heating and pre-reducing (the iron mineral can be pre-reduced in weak reducing atmosphere). The process makes full use of characteristic of high direct carbon reduction speed of the liquid iron oxide, has high production rate and low ton steel-carbon consumption, saves equipment and capital construction investment, fully simplifies material flow, avoids temperature loss of the liquid iron during transportation, and is easy to realize continuous production and automatic control.

The invention belongs to the field of heavy metal wastewater treatment, and particularly relates to an electroplating wastewater zero-discharge treatment method and system. The electroplating wastewater zero-discharge treatment method comprises the following steps: a. sending collected electroplating pretreatment wastewater into an organic wastewater collecting well, and pumping the organic wastewater in the collecting well into a regulating tank; b. respectively pumping cleaning water into a chemical reaction tank by a lifting pump, and pumping supernates in all precipitation tanks into the regulating tank; c. sending the wastewater in the regulating tank into an external membrane bioreactor and a tubular microfiltration membrane system to carry out solid-liquid separation, and sending the product water into a clear water tank; d. absorbing water from the clear water tank by using a high-pressure pump of a reverse osmosis membrane separation system, sending the produced water into a reuse water tank, sending concentrated water of the reverse osmosis membrane separation system into a reverse osmosis circulating concentration system; and e. evaporating to purify heavy metals, recovering the heavy metal salts, and enabling the distilled water to flow back into the regulating tank. The method effectively integrates the chemical precipitation technique, external membrane bioreactor technique, reverse osmosis membrane separation and concentration technique, low-temperature evaporation separation technique and the like; and in the electroplating cleaning wastewater treatment and recovery process, the water recovery rate is up to 95% above, and all the solid metal salts are recovered.

The invention relates to a magnesium alloy/carbon steel pipe composite connection method based on induction heating and electromagnetic forming. A warm electromagnetic forming method is utilized to increase the magnesium alloy forming performance, additionally, electromagnetic induction heating and electromagnetic forming are combined, the induction heating and forming functions are realized by utilizing a same coil, so as to increase the connecting efficiency of a heterogeneous metal tube and facilitate the automation control, and additionally, a warm forming process and an electromagnetic forming process are combined during forming, so that the connecting forming performance is increased. According to the magnesium alloy/carbon steel pipe composite connection method, a magnesium alloy pipe is overlapped with a carbon steel pipe, and after the magnesium alloy inner pipe reaches the set temperature through the electromagnetic induction heating of the coil, the magnesium alloy inner pipe is discharged by the electromagnetic forming coil, so that severe plastic deformation of the magnesium alloy inner pipe occurs, and the magnesium alloy inner pipe after plastic deformation collides and connects with an outer pipe. According to the method, the electromagnetic forming coil is instantaneously discharged through an energy storage capacitor, so as to generate a strong pulsed magnetic field, so that the warm inner pipe is formed at high speed under the action of electromagnetic force and collides with the carbon steel outer pipe with higher rigidity at high speed to generate combination.

A shunt-type filtering device with back wash function of the invention relates to a shunt-type liquid filtering device with back wash function. The invention is applicable to the liquid filtering field, in particular to filtering of water, oil and other liquid. The invention comprises a control valve, a filter flask, a filter element and a drain valve; the control valve is arranged at the upper part of the filter flask which is internally provided with the filter element, the lower part of the filter flask is provided with the drain valve; the drain valve is provided with a valve body which is internally provided with a piston cylinder, one side of the valve body is provided with a liquid inlet and a liquid outlet, the upper part of the valve body is provided with a valve head, an inner cavity of the valve head is provided with a barrel which is internally provided with a screw, and the lower part of the screw is provided with a piston which is arranged in the piston cylinder; the top of the screw is provided with a knob or a stepped motor; the bottom of the piston cylinder is provided with the filter element, one side of the piston cylinder is communicated with the liquid inlet, and one side of the upper end of the piston cylinder is provided with a notch which is communicated with the liquid outlet; the filter element comprises a filter screen bracket, a filter cover, a filtering membrane or a filtering screen; the bottom of the filter screen bracket is arranged on the bottom of the filter flask in a covering by the filter element, and the bottom of the filter flask is provided with a drain outlet which is communicated with the drain valve.

The invention discloses a sleeper replacing device which is composed of a rail-lifting and sleeper-push-pull device, a sleeper lifting and transporting device, a rail car, a generator, a hydraulic system box, a first camera shooting assembly, a second camera shooting assembly and a monitor. The rail car is provided with four castors and two longitudinal beams. The rail-lifting and sleeper-push-pull device, the sleeper lifting and transporting device, the generator and the hydraulic system box are arranged on the two longitudinal beams of the rail car. The rail car is dragged through an engineering van, the monitor is arranged in a cab of the dragging van, and the generator supplies power to an oil pump and a motor. By means of the sleeper replacing device, a working device can be rapidly aligned with the working position; a sleeper push-pull control mechanism is simple in structure and reliable in work; the sleeper replacing device can adapt to sleeper lifting, transporting and placing work of linear and curve rail sections; automatic program control is easy to achieve, and the sleeper replacing device is convenient to operate; the sleeper replacing device is simple in structure, reliable in performance and high in mechanization operation rate, and limited rail maintenance time can be sufficiently and reasonably used for completing the sleeper replacing work.

The invention belongs to production of track boards, and particularly relates to a pre-tensioning method prestressed concrete track board production line maintaining system and application thereof. The maintaining system comprises a steam-maintaining chamber which is arranged between working tracks matched with a mold and provided with an automatic door, a nozzle which is arranged in the steam-maintaining chamber and connected with a constant temperature water supply device, a temperature detection device and a temperature control device, wherein the temperature detection device and the temperature control device are connected with a center control device; a walking track and a transfer pulling device used for pulling a mold are arranged on the ground in the steam-maintaining chamber; thewalking track is connected with the working tracks outside the steam-maintaining chamber; the temperature and humidity detection device comprises a core temperature and humidity sensor, a surface layer temperature and humidity sensor and an environment temperature and humidity sensor; and the temperature control device comprises a steam supply device and an air cooling device. The technical problems that in the prior art, maintaining measures are simplex, and existing standard requirements cannot be met are effectively solved, and the maintaining system has the advantages that the existing standard requirements are well met, high-efficiency assembly line production can be achieved, and automatic control is achieved easily.

The invention relates to a melt direct spinning technology for producing colored polyester filament, belonging to the technical field of chemical fiber production, which mainly solves the technical problem that a melt direct spinning producing method with low cost, high yield, simple technology, easy control of color difference and good color fastness of fabrics is provided. The invention is characterized in that the modified material after drying, melting, filtering and measuring are injected before the polyester melt enters a spinning box; and the modified material and the polyester melt enter the spinning box together for spinning after even mixing in a high-efficiency static mixer. The invention has the advantages of easy infiltration of master batch into fiber, good performance of the colored polyester filament product produced through the method such as high quality, good color fastness, wash resistance and abrasion resistance, simple technology, less equipment investment, easy control of material adding, convenient realization of automatic control, and avoidance of environmental pollution.

The invention relates to a liquid membrane gold extraction-diaphragm electrolysis gold extraction process, which belongs to the metallurgy and chemical industry. The process comprises two parts, namely emulsion liquid membrane gold extraction and gold-contained enrichment diaphragm electrolysis gold extraction, wherein the emulsion liquid membrane gold extraction comprises the preparation of an emulsion liquid membrane, the extraction process of the emulsion liquid membrane, and the emulsion breaking process of a gold-contained emulsion liquid membrane. The process has the advantages that the process has a large driving force of mass transfer, few separation stages needed, and little agent consumption; the process improves the production efficiency and greatly simplifies the gold extraction technical flow; useful materials are reclaimed so as to produce no secondary pollution and achieve the more effective energy utilization; and the process is taken as unit operation, and has flexible use, convenient operation and easy realization of automatic control.

The invention relates to a method for extracting organic solvents and hydrazine sulfate from wastewater generated in synthesis of hydrazine hydrate by a ketazine method. The method comprises the following steps: converting, purifying hydrazine sulfate, rectifying and preparing isopropanol, wherein the step of conversion comprises the following steps: slowly dropping sulfuric acid into a hydrazine hydrate wastewater solution under the condition of 0-15 DEG C so as to precipitate and separate out hydrazine sulfate from the solution, and performing centrifugal filtration to obtain a crude hydrazine sulfate product; the step of purifying hydrazine sulfate comprises the following steps: filtering the crude hydrazine sulfate product, washing for 2-3 times by using cold water, and performing centrifugal filtration and drying crystallization so as to obtain a pure hydrazine sulfate product; the step of rectifying comprises the following steps: collecting filtrate and a washing liquid, feeding into a rectifying tower, rectifying when the tower top temperature is 55-56 DEG C so as to collect a pure acetone product, and rectifying when the tower top temperature is 80-82 DEG C so as to collect binary azeotrope of isopropanol-water; the step of preparing isopropanol comprises the following steps: dehydrating the binary azeotrope of isopropanol-water by using caustic soda flakes, and subsequently distilling, thereby obtaining a pure isopropanol product.