94results about How to "Continuous stable operation" patented technology

The invention provides a tubular pyrohydrolysis treatment method and device for sludge. The device consists of five main systems, namely a feeding system, a modification system, a dehydration system, a heat exchange system, and a purification system; and by adopting a catalyst injecting mode, the sludge is directly heated with medium pressure steam and is subjected to pyrohydrolysis at medium temperature, the remaining heat in the hydrolysis process is fully recycled, and a liquid-solid mixture is obtained, so not only supports of controllable components are provided for a compound fertilizer, but also a filter cake which is subjected to liquid-solid separation has an adjustable moisture content, namely the moisture content of the raw sludge can be reduced to 40 to 60 percent from about 80 percent. Compared with the prior art, the device has the advantages that: the structure is simple, the device can be continuously and stably operated, the sludge pyrohydrolysis temperature is 210 to 250 DEG C, the reaction time is 10 to 20 minutes, the reduction and harmless treatment of the sludge can be economically, quickly and effectively achieved, the sludge can be treated on a large scale, and a novel approach is provided for the sludge treatment and the energy recycling of equipment.

The invention discloses a novel fluidized bed semicoke production system and a process thereof. The novel fluidized bed semicoke production system comprises a drying system and a dry distillation system, wherein the feed end of the drying system is connected with a feeding device, the tail gas of the drying system is reclaimed after passing through at least one stage of drying and dust removing device, and the drying system is connected with a heat source; both the discharge end of the drying system and the discharge end of the drying and dust removing device are connected with the feed end of the dry distillation system; and after passing through at least one stage of dust removing device, one path of the pyrolysis gas of the dry distillation system is used as the fluidizing medium of the dry distillation system for closed circulation, one part of the other path passing through at least one stage of condensing device is evacuated, the other part is burnt and then used as the heat source of the system, and the discharge end of the dry distillation system is connected with a finished product area. After lignite is processed and upgraded by adopting the technology, low-temperature semicoke as solid fuel and low-temperature coal tar as a derivative with good stability, low sulfur content and high heat value can be produced. Meanwhile, the novel fluidized bed semicoke production system has high heat utilization ratio, no environment pollution and high comprehensive utilization level of resources, can be continuous and stable to operate and realizes large-scale production.

The invention provides an ore-dressing method for recovering nickel from ore-washing slurry of copper-nickel sulfide ore. The method comprises the following steps: performing a gravity concentration process on the ore-washing slurry; storing and dewatering the ore sand of the gravity concentrate; performing an open-circuit grinding process; performing a main program check screening process; performing a closed-circuit grinding process on unqualified grains; adding drugs in qualified grains and then performing a flotation process, wherein after performing the processes of coarse selecting, scavenging and finely selecting, the nickel concentrate grade is 6%-8%, the copper grade is 1%-1.6%, the grade of nickel in tailings is less than or equal to 0.2%, and the grade of copper in tailings is less than or equal to 0.04%; and then concentrating and dewatering the gravity concentrate tailings by using a concentrating machine; performing a slurry flotation process; adding a dispersing agent after adjusting the slurry with high concentration; and adding an ore-dressing reagent in stage adding manner, wherein the nickel concentrate grade is 4%-7% and the copper grade is 0.8%-1.5%. The ore-dressing method has the advantages of low cost, high production efficiency and high comprehensive recovery rate of valuable metal. The ore-dressing method is an ideal ore-dressing method for recoveringnickel from ore-washing slurry of copper-nickel ore.

An ion exchange process for preparing glycose features that multiple cationic resin columns are parallelly connected into a group, multiple anionic resin columns are parallelly connected into a group, and both groups are connected via buffer tank and pump. Its advantages are regeneration of any resin column without stopping production, low cost for regeneration and saving resin by 30%.

An embodiment of the invention discloses a stepless speed-up type wind power generation system. A wind wheel is connected with a stepless speed regulating mechanism through a spindle, the stepless speed regulating mechanism is connected with a three-level differential planet gear speed-up mechanism through a first-stage planet carrier of the three-level differential planet gear speed-up mechanism, the three-level differential planet gear speed-up mechanism is connected with a generator through a high-speed shaft, input energy of the wind wheel is wind energy, output kinetic energy of the wind wheel is input into the spindle, output kinetic energy of the spindle is input to the stepless speed regulating mechanism, the stepless speed regulating mechanism can control and change an input rotating speed continuously in a stepless mode, stabilizes an output rotating speed and outputs the speed to the follow-up three-level differential planet gear speed-up mechanism, the three-level differential planet gear speed-up mechanism transmits input power to the high-speed shaft through speed-up transmission with a certain transmission ratio, the rotating speed of the high-speed shaft is the same as the rotating speed of the generator so as to output the kinetic energy into the generator, and the generator converts the energy input by the high-speed shaft into electric energy and sends the electric energy to a power grid.

The invention discloses a process for hydrogen production by adsorption catalysis of crude synthetic gas and a device thereof. The process comprises the following steps: 1) mixing water vapor and the crude synthetic gas according to a water-carbon mol ratio of 2 to 6, adding a reduced reforming catalyst with an adsorption function, and carrying out a reforming hydrogen-producing reaction in a fluidized state; 2) oxidizing the reforming catalyst after a high-temperature combustion reaction so as to remove carbon deposit and sulfur-containing components on the reforming catalyst, and heating the reforming catalyst so as to release CO2 and realize regeneration; and 3) subjecting the regenerated reforming catalyst to in-situ reduction at 400 to 900 DEG C, subjecting the reduced reforming catalyst to circulating production of hydrogen, i.e., a product. According to the invention, the crude synthetic gas containing coal tar and sulfur can be further converted into hydrogen, so sulfur removal and coal tar separation of the crude synthetic gas are saved, and the selection range of hydrogen-producing raw gases is greatly broadened; through in-situ reduction of the reforming catalyst, a reduction procedure is not needed to be additionally arranged; and the device provided by the invention saves the use of auxiliary equipment like a degassing tank and a reduction reactor, so procedures are greatly simplified.

The invention provides a method and a device for preparing sodium methoxide by coupling steam permeation and alkaline process. The method is characterized in that the produced methanol-water mixture in the alkaline type sodium methoxide production process is separated by a steam permeation membrane separation device and a technique, and the separated high-purity methanol is directly used for the production of the sodium methoxide. The device and the method have the advantages that the steam permeation membrane separation is used for the steam recycling of sodium methoxide, so that the traditional rectification methanol recycling tower is replaced; compared with the prior art, the anhydrous methanol can be completely recycled and reutilized, so as to ensure the stable and continuous runningof the reaction process; the operation elasticity is improved, the energy consumption is decreased, and the running cost, land occupation area and investment cost are reduced; the operation of the whole set of device is simple and convenient, and the running is stable.

The invention discloses a deep evaporating method for a phenol hydroxylated liquid detarring tower, which comprises the following steps of: (1) feeding at a lateral line liquid phase material inlet in a rectifying tower, and pumping the tower bottoms in the rectifying tower into a bottom reboiler and a double-shaft stirring reboiler by a bottom material outlet through a circulating pump; (2) after heating the materials entering from the tower into the double-shaft stirring reboiler, changing the volatile components into steam and then distilling the steam entering the rectifying tower by a lateral line gas phase material inlet through a pipeline, changing a top gas phase of the rectifying tower into condensate after heat exchange with a condenser and soft water, and extracting part of condensate from a material extracting port on a side wall of the tower top; and (3) changing the soft water in the condenser into steam after the soft water exchanges heat with the top gas phase of the rectifying tower, and then enabling the soft water to enter a steam drum through a pipe, and conveying the steam in the steam drum to other low pressure steam users when the steam pressure reaches the set pressure. According to the method, the stability of the product quality and the running reliability of the devices are improved.

A process for preparing WO3 nanocrystals from tungsten halide by HF plasma CVD method includes the oxidizing reaction in HF plasma jet, and sudden cooling.

The invention relates to a DMF (dimethyl formamide) waste gas water-washing recycling device for manufacturing of copper-clad plates. The device comprises a filter, a flow meter, a fan, a water-washing tower, a multi-stage circulating water pump, multiple circulating liquid storage tanks and a control system, wherein the filter is connected with the flow meter; the flow meter is connected with the fan; the fan is connected with the water-washing tower; the water-washing tower comprises a wind inlet, a wind-equalizing pore plate, multiple sprayers, a tower plate and a waste gas outlet; the multiple circulating liquid storage tanks are connected with the tower plate; the multiple circulating liquid storage tanks are also connected with the multiple sprayers through the multi-stage circulating water pump; a groove is formed around the outer edge of the tower plate; a circular opening is formed in the middle of the tower plate; the diameter of the circular opening is smaller than that of the inner edge of the groove; multiple rows of flow-guiding inclined plates are supported on the upper end surface of the tower plate; multiple steel plates for fixing the flow-guiding inclined plates are arranged on the upper end surfaces of the flow-guiding inclined plates. The DMF waste gas water-washing recycling device for manufacturing of copper-clad plates makes airflow distribution more uniform, reduces resistance of the tower plate, and adopts multi-stage independent circulating absorption, with the DMF absorbing rate reaching up to 98.5%.

The invention discloses a nesting device used in a nesting process for a highly-vacuum multilayer heat-insulating LNG tank for a ship and relates to the field of manufacturing the highly-vacuum multilayer heat-insulating LNG tank for the ship. The nesting device comprises a self-powered tractor which comprises a chassis, two traveling speed reducers, two traveling motors, a flange half shaft, a coupler and a rotating motor, two driving wheels and two driven wheels are mounted on the lower portion of the chassis, a shaft of each driving wheel is connected with an output shaft of one traveling speed reducer, and an input shaft of each traveling speed reducer is connected with one traveling motor. The tractor can draw an inner container to be in horizontal linear motion on a rail, so that nesting and horizontal axial positioning of the inner container and an outer shell are facilitated; the tractor also can drive the inner container to rotate, so that peripheral positioning of the inner container and the outer shell can be assisted during nesting; the nesting device is continuous and stable in operation in the process of nesting, scratching risk is avoided, and low-temperature performance of the highly-vacuum multilayer heat-insulating LNG tank which is produced finally is unaffected.

A crystallization process for glucose production features several horizontal crystallizers connected serially for continuous feeding, continuous crystallization and continuous discharging. The stable continuous operation of the crystallization process is maintained by controlling the material inlet temperature, discharging temperature and other several main parameters. Compared with the traditional crystallization process, the present invention has the advantages of low investment in equipment, high production efficiency, continuous stable operation of crystallization process, high product quality and high yield of crystallized glucose.

Provided is an operation device capable of being mounted on a small electronic apparatus and allowing various kinds of operations. A film-like reinforcing member 4 formed of PET or the like is fixed to the undersurface of an elastic member 2 formed of silicone rubber, and a detection means 20A is fixed to its lower part. An operation surface 10 formed of a resin layer having low friction resistance is formed on a surface of the elastic member 2. When the operation surface 10 corresponding to switch parts S1-S5 is pressed, the elastic member 2 and the reinforcing member 4 are locally deformed, and projections 5a-5e turn on the switch parts S1-S5 provided for the detection means 20A. Since the output voltage of an extraction pattern 26 is different on the basis of ON states of the switch parts S1-S5, which switch part is operated can be detected from the output voltage.

The invention relates to a method for recycling a crude product triethylamine in AKD (alkyl ketene dimer) production. The method comprises steps as follows: a, the crude product triethylamine is subjected to crude separation by a decanter; b, the crude product triethylamine enters the top of an evaporator after preheated by a preheater, heavy components enter a revaporizer, residual triethylamine is continuously evaporated in the revaporizer, and the heavy components are discharged from a tower bottom; c, light components continuously enters a rectifying tower after evaporation, and trace moisture in triethylamine is removed according to the azeotropic distillation principle; and d, trace solid particles in the crude product triethylamine evaporation process are removed by a filter arranged at the tower bottom. The crude product triethylamine in the AKD production process is treated and reused in AKD production, waste water and waste residue emission pollution is avoided, gas-phase feeding is adopted, steam consumption is reduced, further, triethylamine recycling rate is high, the production cost of an AKD product is reduced, and more remarkable economic benefits are achieved.

The invention relates to a continuous low-energy consumption acetonitrile refining process which comprises the following steps of: continuously refining crude acetonitrile in a decyanation tower, a chemical treatment kettle, a drying tower, a finished product tower and a tail gas absorbing tower and removing impurities to obtain a qualified acetonitrile product. The chemical treatment kettle comprises three same kettles which are connected with one another in parallel; the three kettles respectively run through process control to accept feeding, reacting and discharging and circularly operate, so that the whole chemical treatment kettle continuously feeds and discharges and continuously refines acetonitrile; and the drying tower and the finished product tower are used for heat integration. Compared with the prior art, the continuous low-energy consumption acetonitrile refining process has the advantages of continuous and stable operation, reduced production energy consumption, reduced operation expense, improved economic benefit and the like.

The invention relates to an electric four-way plug valve. The technical scheme includes that the electric four-way plug valve comprises a valve, a main feed inlet, a side feed outlet I, a side feed outlet II, a bypass outlet, a plug, a valve stem, a valve bonnet, a support, a packing gland, packing box blowing devices, a valve cavity blowing device, an electric head, a worm, a worm gear, an upperfriction disc, a lower friction disc, a transmission lead screw, a disc spring and a connector. The electric four-way plug valve has the advantages that the electric four-way plug valve is positionedon a coke tower bottom oil inlet pipeline of a device and is used for switching the flow directions of raw oil, accordingly, the raw oil from a heating furnace can be assuredly timely switched from acoke tower filled with coke to another preheated coke tower to continue to be operated, the device can be continuously and stably operated, is easy to electrically control, low in steam consumption, simple in structure and convenient to operate, and the manufacturing cost and the production and operation costs of the device can be reduced to a great extent.

In a method of using a catalyst for selective catalytic reduction to remove nitrogen oxide included in flue gas, a catalyst module element and a catalyst module are provided which have excellent wear resistance, durability, thermal shock resistance and impact resistance, stable and continuous operation is provided by prevention of damage of a catalyst, and the fracture of the catalyst is caused by the flow velocity of the flue gas. A method for manufacturing the catalyst module element and the catalyst module are also provided. The catalyst module has excellent wear resistance, durability, thermal shock resistance and impact resistance, and damage of the catalyst is minimized, even if impact is applied to the flow velocity of the flue gas containing coal dust when the flue gas passes through a catalyst reactor, and thus shortening of life is suppressed, stable operation can be realized. The removal efficiency of the nitrogen oxide is excellent, and the manufacturing method is simple.