66results about How to "Does not affect stable operation" patented technology

The invention discloses an LCC-MMC hybrid three-terminal high-voltage direct current transmission system and a DC fault fast current limiting method thereof. The LCC-MMC hybrid three-terminal high-voltage direct current transmission system comprises a transmitting end converter station LCC and receiving end converter stations, namely, two hybrid MMCs, and redesigns a control architecture of the existing hybrid direct current transmission system. The DC fault fast current limiting method provides a fault current limiting control strategy for the LCC and the MMCs, suppresses the magnitude of fault currents of the transmitting end LCC and the receiving end MMCs by adopting an additional control strategy during the system DC fault transient process, quickly suppresses the DC fault current whena DC fault occurs in the system, and protects current converter equipment. The LCC-MMC hybrid three-terminal high-voltage direct current transmission system and the DC fault fast current limiting method thereof realize the independent control of AC-DC control through AC-DC decoupling, enable each bridge arm to output a bridge arm output voltage reference value, and realize the control of AC and DC currents at the same time; and when a direct current fault occurs, the MMCs operate near a zero direct voltage through quickly switching the transmitting end LCC into an inverting state and negatively inputting full-bridge sub-modules of the receiving end hybrid MMCs, thereby realizing elimination of the DC fault current.

The invention discloses a high-voltage direct-current transmission line high-resistance grounding fault identification method based on distributed parameters. The method comprises the following steps that step 1, direct-current line current at a rectification station side and direct-current line current at an inversion station side are monitored in real time, if the condition (||IR|-|II||) I set is satisfied in continuous 3ms, the existence of a fault point in a high-voltage direct-current transmission line is judged, and then a step 2 is conducted; step 2, fault point residual voltage URFm is calculated at the rectification station side and fault point residual voltage UIFm at the inversion station side is calculated respectively, and if URFM>=0.1IdR, an in-zone high-resistance grounding fault is judged, and a protecting outlet t1 is delayed; if URFm< 0.1IdR, an in-zone metal fault is judged, and a protecting outlet t2 is delayed. According to the high-voltage direct-current transmission line high-resistance grounding fault identification method based on the distributed parameters, the fault point residual voltage when the high-voltage direct-current transmission line grounding fault occurs is compared with initial stable voltage when high-resistance grounding fault occurs, whether the high-resistance grounding fault occurs or not is judged, so that the protecting outlet is started, the protecting outlet is not influenced by transition resistance, the shortage of protection of motion rejection when the high-resistance grounding fault occurs in a current direct-current line is compensated, and the flexibility of protection motion is improved.

The invention relates to an LCL-type grid-connected inverter parallel connection virtual impedance control method. Under weak grid conditions, a parallel connection virtual impedance control method isprovided, difference is solved between grid-connected current ig and grid-connected instruction current parameters iref to obtain a signal ei, then difference is solved between the signal ei and a current signal fed back by an inverter side virtual impedance Zp(s), a and after double-current feedback control, a PWM modulating wave signal is generated to be transmitted into a PWM generator to generate a switch signal. After parallel connection virtual impedance, a system phase margin is increased, a harmonic is obviously lowered, the robustness and the interference resisting capability of thesystem are effectively improved, it is guaranteed that grid-inlet current is not greatly influenced by grid resistance, a parallel connection inverter can still normally work under the change of gridresistance wide ranges, the harmonic is small, and the applicability is good; in the dynamic response process of transforming a half load to a full load of the grid-connected virtual impedance, compared with a traditional method, the transition time is shorter, the overshooting amount is reduced, and stable running of a grid-connected inverter system is not influenced.

The invention discloses a cascaded automatic generation control method for a hydropower station group and belongs to the technical field of hydraulic and electric engineering. The automatic generation control method comprises the following steps: selecting hydropower stations and carrying out classification and topological relation treatment on the hydropower stations; setting related initial conditions; determining a vibration zone of the hydropower stations and output correction modes; decomposing a cascaded real-time load to obtain a basic load (EDC) component and an adjusting load (ACE) component, and judging whether a cascaded EDC model is invoked or not according to real-time information deviation; constructing the cascaded EDC model to distribute the EDC component; constructing a narrow-sense cascaded AGC model to distribute the AGE component; and obtaining real-time set outputs of the cascaded hydropower stations. According to the method disclosed by the invention, the counter adjusting effect of a daily adjustment hydropower station is fully exerted to coordinate cascaded pitch peak and frequency modulation operation. The cascaded load EDC component and the ACE component are respectively distributed, so that the problem of massive load transfer is effectively avoided, and the economical benefit and the safety of the cascaded hydropower stations are ensured. Therefore, the engineering practicality of the method disclosed by the invention is further enhanced.

The invention relates to a sludge cyclone separation and activation treatment method and device. The sludge cyclone separation and activation treatment method comprises the following steps: (i) sludgebackflow separation: carrying out cyclone separation treatment on sludge so as to directionally discharge inorganic substances in the sludge as residual sludge, and returning active ingredients to abiochemical tank which comprises an anoxic tank and an aerobic tank; and (ii) internal backflow separation and activation: carrying out cyclone separation treatment on a sludge-water mixed solution atthe tail end of the aerobic tank, returning separated high-activity components to the anoxic tank for circulation, and discharging low-activity components to the aerobic tank nearby. The invention further provides the sludge cyclone separation and activation treatment device.

The invention provides a system and a method for hazardous waste incineration. The system comprises a feeding system, an incineration system, a cooling system and a flue gas treatment system which aresequentially arranged; the feeding system comprises an elevator and an SMP system which are arranged in sequence; the incineration system comprises a rotary kiln and a secondary combustion chamber which are sequentially communicated, and is used for sequentially pyrolyzing fed materials twice until the fed materials are completely pyrolyzed to obtain double-pyrolyzed flue gas; the cooling systemcomprises a cooling tower and is used for cooling the double-pyrolyzed flue gas to obtain cooled flue gas; the flue gas treatment system comprises a quench tower, a first-stage dry deacidification tower, a first-stage bag-type dust collector, a second-stage dry deacidification tower, a second-stage bag-type dust collector, a wet deacidification tower, a flue gas heater, a chimney and a first-stageactivated carbon spraying device which are connected in sequence, and further comprises a first-stage activated carbon spray device used for carrying out a series of treatments on the cooled flue gasand completely discharging the treated flue gas. The method uses the system to incinerate hazardous wastes. The system and the method can be used for incinerating hazardous wastes with high sulfur, chlorine and fluorine contents.

The invention relates to an efficient stokerfeed boiler ozonation desulfurization and denitrification integrated process system. The system mainly comprises a flue gas system, an air source oxygen generation system, an oxygen storage and supply system, an ozone generation system, a recirculating cooling water system, an ozone injection system, an absorption tower system, a process water system, a compressed air system, a magnesium oxide method flue gas desulphurization system, a gas flow measuring system, a high-low pressure distribution and control system and the like. According to the efficient stokerfeed boiler ozonation desulfurization and denitrification integrated process system, the ozonation oxidation technology is utilized for flue gas denitrification, the strong oxidizing property of ozone is utilized for oxidizing a water-insoluble nitric oxide in flue gas into freely-soluble N2O5 and other gas and absorption is performed through a follow-up absorbing device. The technology has the advantage of being high in flue gas adaptability and can remove flue gas containing high dust content, the denitrification efficiency can reach 95%, and meanwhile the denitrification efficiency can be adjusted according to on-site requirements.

The invention relates to an exception handling method for a multi-application module client in the same process. The exception handling method comprises the following steps of building functional units; building an application program domain for each functional unit Mi in boarding process P of a system S by the system S; boarding each functional unit in the corresponding application program domain; integrating each application program domain and the corresponding functional unit by the system; boarding the system and the functional units in a single process; carrying out data transfer among different functional units by a data transfer method crossing the application program domains when service relevance exists among different functional units; and downloading the functional unit by the system when the functional unit is abnormal. By the exception handling method, the influence range due to abnormality of the system can be effectively controlled, all functional modules are safely separated, the system safety is guaranteed, and the system stability is improved.

The invention relates to a blast furnace gas bypass desulfurization device, which comprises a coarse dust remover, a fine dust remover, a hydrolysis catalysis tower and a desulfurization tower, wherein the coarse dust remover, the fine dust remover, the hydrolysis catalysis tower and the desulfurization tower are sequentially communicated along the flowing direction of a gas path. The desulfurization method comprises the steps that blast furnace gas is fed into the coarse dust remover for coarse dust removal; the blast furnace gas discharged from the coarse dust remover enters the fine dust remover for fine dust removal; the blast furnace gas discharged from the fine dust remover enters the hydrolysis catalysis tower for hydrolysis catalysis so as to convert COS into H2S; and the blast furnace gas discharged from the hydrolysis catalytic tower enters the desulfurization tower to be desulfurized. The problem that SO2 after gas combustion cannot meet the environmental protection requirement due to high total sulfur caused by organic sulfur COS, inorganic sulfur H2S and the like in blast furnace gas is solved; and carbonyl sulfide (COS) in the blast furnace gas is efficiently converted into inorganic sulfur (H2S) through hydrolysis by utilizing the characteristics, residual pressure and temperature of the blast furnace gas, and the total sulfide removal rate reaches 90% or above.

The invention provides a block clearing device for a combustion chamber negative pressure sampling pipeline. The block clearing device comprises a sampling pipe, a coil, a block clearing assembly andan anti-falling frame, wherein the sampling pipe comprises an inner sampling pipe and an outer sampling pipe, one end of the inner sampling pipe downwards obliquely penetrates through a heat preservation wall and extends into a combustion chamber, and the other end of the inner sampling pipe is arranged outside the heat preservation wall and is welded with one end of the outer sampling pipe into awhole sampling pipe; the anti-falling frame is welded on the inner wall of a welding part between the inner sampling pipe and the outer sampling pipe; the coil is uniformly wound on the outer wall ofthe middle part of the sampling pipe, and the two ends of the coil are electrically connected with a polarity reversing switch; and the block clearing assembly is arranged inside the sampling pipe and can slide back and forth along the two ends of the sampling pipe, the block clearing assembly is provided with a first magnet and a second magnet in an embedded mode, and the opposite faces of the first magnet and the second magnet are in a same polarity. The block clearing device for the combustion chamber negative pressure sampling pipeline does not need to withdraw main protection, an end cover of the sampling pipe does not need to be opened, and the purpose of efficient block clearing of the sampling pipeline can be achieved no matter the load of the unit; and in addition, the normal sampling is not affected under a working and a stopping state, the stable operation of the unit is not affected, the device is not limited by time, and the operation is simple.

This invention relates to a charge method based on general packet wireless service, which sets up a comprehensive gateway between GPRS core network and data network for calculating data service flow and analyzing data service content, the GPRS core network is communicated with the data network via said comprehensive gateway, the new device of which is butt-jointed with GPRS core network and data network by the original standard interface. So, it's not necessary to upgrade and reform the present GPRS core net devices or the present data network device, the new comprehensive gateway device unifies the flow charge and content charge into a same collection point to finish it.

The invention discloses a fluidized bed gasification furnace deslagging method and a device, and the fluidized bed gasification furnace deslagging device comprises a gasification furnace, wherein oneregion in the gasification furnace is defined as a gasification reaction region and is used for carrying out a gasification reaction; an ash cooling area which is communicated with the gasification reaction region, wherein cooling gas is introduced into the ash cooling area; and a slag discharging machine which is arranged in the ash cooling area and is used for quantitatively discharging ash slaggenerated by the gasification reaction. By arranging the ash cooling area communicated with the gasification reaction region and arranging the slag discharging machine in the ash cooling area, the problems of sealing leakage and operation faults of the slag discharging machine at high temperature are effectively solved, and high-temperature ash generated by the pressurized fluidized bed gasification furnace is cooled, quantified and stably discharged.

The invention relates to a glass-sealed voltage regulation diode, a tube core and a manufacturing method thereof. The tube core comprises a silicon wafer, a passivation protection layer, a first electrode and a second electrode. Arc-shaped gaps are formed around the front surface of the silicon wafer; an island area is formed in the center, a first electrode is attached to the center island area on the front face of a silicon wafer, a second electrode is attached to the back face of the silicon wafer, a passivation protection layer avoids the first electrode and is attached to an arc notch ofthe silicon wafer, and the passivation protection layer is of a three-layer composite structure and sequentially comprises a first silicon dioxide layer, a PSG layer and a second silicon dioxide layerfrom the silicon wafer to the outside. The diode further comprises a first tungsten column, a second tungsten column, a glass outer cover, a first lead end and a second lead end on the basis of the tube core, the first tungsten column and the second tungsten column are respectively welded with the first electrode and the second electrode, and the first lead end and the first lead end are respectively welded with the first tungsten column and the second tungsten column; the glass outer cover is packaged on the outer sides of the first tungsten column and the second tungsten column and used forprotecting the tube core. The diode is low in thermal resistance and high in reliability.

The invention relates to the field of delayed coking processes in petrochemical industry, and discloses a delayed coking apparatus and a method for processing a catalytic oil slurry. The apparatus comprises a residue oil pre-heating unit (1), an oil slurry pre-heating unit (2), a coke tower (3), a fractionation tower (4) and a product collecting system (5), wherein the residue oil pre-heating unit(1) is used for pre-heating a residue oil raw material, the oil slurry pre-heating unit (2) is used for pre-heating a catalytic oil slurry raw material, the coke tower (3) is connected to the residueoil pre-heating unit (1) and the oil slurry pre-heating unit (2), and is used for heating and reacting the residue oil raw material and the catalytic oil slurry raw material, the fractionation tower(4) is connected to the coke tower (3), and is used for separating the reaction product, and the product collecting system (5) is connected to the fractionation tower (4), and is used for collecting the reaction product. According to the present invention, the apparatus can operate for a long period, the oil slurry pre-heating unit is easy to clear and repair, and the economic benefits can be increased.

The invention provides a treatment method of RT base production waste. According to the treatment method, aniline is taken as a solvent, at 30 to 180 DEG C, waste, with a phenazine content higher than 10%, generated in RT base production process is dissolved; a liquid phase obtained via dissolving is subjected to crystallization separation at 10 to 50 DEG C so as to obtain a solid phase product and a liquid phase product; wherein the solid phase product can be taken as a raw material of phenazine refining, and the liquid phase product can be delivered into a RT base distillation system for recycling of RT base, aniline, and azobenzene.

The invention discloses a semi-dry desulfurization process calcium-based desulfurizing agent and a preparation method thereof. The semi-dry desulfurization process calcium-based desulfurizing agent comprises the following components in percentage by weight: 8-20 percent of quicklime powder, 10-20 percent of lime kiln dust-removing powder, 60-80 percent of lime kiln sieve residue and 0.5-2 percent of admixture. The semi-dry desulfurization process calcium-based desulfurizing agent takes the lime kiln dust-removing powder, the lime kiln sieve residue and other industrial wastes as main raw materials, and through performing grading design on the particle sizes of the raw materials, the problems of high cost of the semi-dry desulfurization process calcium-based desulfurizing agent and resource utilization of wastes produced in the production of a lime kiln can be effectively solved; the prepared semi-dry desulfurization process calcium-based desulfurizing agent has higher digestive activity, desulfurization efficiency and stability and is suitable for popularization and application.

The invention provides a method for cross-physical-area multi-platform complex data center overall migration, comprising the following steps: deploying VPLEX equipment, carrying out Active-Active processing on core storage, implementing Active-Active storage packaging on a host level, and realizing pairwise Active-Active mirroring on service system data stored in each storage; employing a logicalcorrelation mapping analysis technology to design scientific and reasonable migration batches and a plan list for the problem that systems and equipment of all old machine rooms are closely associatedand cannot be migrated in batches, and implementing batch migration according to the plan and the list; cloning systems on old equipment a virtual machine on a virtualization platform by using a PtoVtechnology provided in a server virtualization technology, and implementing migration of a host machine on the virtualization platform by depending on an HA technology of the virtualization platform;using dual-computer hot standby technology to provide two physical servers for an important system with a single-point fault for deploying a database 58 and an application 59 respectively, meanwhile,establishing a cluster environment is established. Therefore, the data safety is improved.

The invention relates to a device for changing a water channel to remove iron and manganese ions in water in a forced mode. The device consists of a water inlet pipe, a water distribution plate, a filter material bed, a water flow resistance plate, a water outlet pipe, a water distribution system and a tank body, and is characterized in that the top end of the filter tank is connected with the water inlet pipe; the water distribution plate is positioned in the filter tank; the water distribution plate is horizontally centered and is arranged at the lower end of the water inlet pipe; the filter material bed is positioned at the middle section in the filter tank; the water flow resistance plate is arranged on two sides of the inner wall of the filter tank; the water distribution system is positioned below the filter material bed in the filter tank; and the water outlet pipe is connected to the bottom of the filter tank. The structure in the filter tank is changed, and the water channel is changed in a forced mode, so that the water flow is uniformly filled with the whole filter material, the filter material is fully utilized, the water distribution plate is flushed through hydraulic power, the potential energy of the water flow is reduced, and the direct impact of the water flow on the lower filter material is reduced; and due to the water flow resistance plate on the tank wall, the water flow in the filter can be uniform in water distribution, the resistance of each point in the plane is balanced, the removal rate of iron and manganese is improved, and the stable operation of the filter tank is not influenced.

The invention discloses a sludge treatment system, which comprises a drying treatment device used for drying sludge, a mixed material grinding device used for mixing the dried sludge with pulverized coal to grind a mixed material, and a gasification treatment device used for gasifying the ground mixed material; the drying treatment device is provided with a discharge port, which is communicated with the feed port of the mixing and grinding device, and the discharge port of the mixing and grinding device is communicated with the inlet of the gasification treatment device. According to the system, the sludge is subjected to drying treatment to remove moisture in the sludge, so that the problem that the heat value of the sludge with high moisture content is low is solved, the sludge disposal amount of a gasification furnace is increased, the dried sludge and pulverized coal are co-gasified by utilizing a mature dry pulverized coal gasification furnace, new disposal equipment is not needed, the sludge disposal cost and the operation cost are reduced, and synthesis gas with high combustible components is generated; the sludge treatment system can be used for synthesizing chemicals or used as clean fuel gas while the gasified residues and other inorganic matters can be used for making bricks, and the resource utilization rate is high.

The invention provides an on-line cleaning device for a cooler. The on-line cleaning device comprises a backflow mechanism, a storage mechanism and a supply mechanism which are connected in sequence,the backflow mechanism is connected with a water return pipeline of the cooler, and the supply mechanism is connected with a water inlet pipeline of the cooler. When the cooler needs to be cleaned, awater inlet valve in the water inlet pipeline and a water return valve in the water return pipeline are closed, a feeding valve and a feeding pump 7 in the supply mechanism and a material return valvein the backflow mechanism are opened, cleaning liquid in the storage mechanism is promoted to form closed circulation between the cooler and the storage mechanism, water scale in the cooler is removed, and the reacted medicine liquid and the water scale are discharged through a discharging hole. According to the on-line cleaning device, the cooler does not need to be dismounted, online cleaning is achieved, the device is simple and efficient, and stable operation of a unit is not affected.

The invention relates to the technical field of distribution boxes, and discloses a transformer distribution box convenient for heat dissipation, which comprises a box body and a box door, the box body comprises a bottom plate, a top plate located over the bottom plate, a back plate arranged between the bottom plate and the top plate and two side plates oppositely arranged between the bottom plate and the top plate, and heat dissipation cavities are formed in the side plates; and ventilation holes communicated with the outside of the box body are formed in the cavity wall of one side of the heat dissipation cavity, heat dissipation holes communicated with the mounting cavity are formed in the cavity wall of the other side of the heat dissipation cavity, the ventilation holes and the heat dissipation holes are distributed in a staggered mode, and a cleaning assembly used for cleaning dust in the ventilation holes is arranged in the heat dissipation cavity. The mounting structure has the effect that dust is not prone to entering the mounting cavity through the ventilation holes.

The invention discloses a treatment method of hydrazine hydrate byproduct sodium chloride saline water, which comprises the following steps: a, adding an acid into hydrazine hydrate byproduct sodium chloride saline water, regulating the pH value of the saline water to be less than or equal to 4, and adding a homogeneous catalyst into the saline water; b, fully enabling the heated saline water to make contact and react with oxygen; c, adding a homogeneous catalyst into the saline water after the primary reaction, adding an acid to adjust the pH value to be less than or equal to 2, and then conducting full contact with oxygen for reaction; s5, cooling the saline water after the secondary reaction, and removing gaseous ammonia in the saline water after the secondary reaction through an ammonia nitrogen separation membrane; and s6, carrying out evaporative crystallization on the saline water, and then carrying out solid-liquid separation to obtain a solid salt product. The method has the advantages that the TOC of the solid salt product can be controlled to be 10ppm or less, the ammonia nitrogen can be controlled to be 4ppm or less, and the treatment cost is low. The prepared solid salt can be directly used as a chlor-alkali production raw material to enter an ionic membrane electrolytic cell system for use, or is matched with newly purchased raw salt in proportion to enter the ionic membrane electrolytic cell system for use, and the stable operation of the ionic membrane electrolytic cell is not influenced.