67results about How to "Stable economic operation" patented technology

The invention discloses a fluidized bed boiler control and combustion optimization system. The problem that a fluidized bed boiler system is not easy to control for a long time is solved. According to a method, a control strategy of combining an advanced control algorithm and a conventional control algorithm is adopted, and continuous, economical and stable operating of the boiler system is guaranteed; multivariable model-free adaptive control is adopted, and decoupling control of the fuel quantity and the air supply quantity over the bed temperature under the variable load work condition is achieved; and a nerual network technique is adopted for building a boiler combustion prediction model, online calculation of the boiler efficiency and NOX and SOX emissions is achieved, a multi-objective optimization function is constructed according to the prediction result, a combustion self-optimization algorithm is adopted, the flue gas oxygen content and the bed temperature are optimized constantly so as to adapt to work condition changes, and a fluidized bed boiler can operate in an optimal combustion area.

The invention discloses an optimal control method for a grinding process in a cement plant. By collecting grinding process signals and taking the advanced control as the core, the method realizes automatic control of material level and material level distribution, automatic control of circulating load and ventilation and also realizes optimization of material level of every bin in the mill, optimization of material velocity, optimization of circulating load and ventilation and also realizes output control of feed quantity, rotational speed of a powder-choosing machine and the rotational speed of a fan. The method optimizes the whole grinding process and realizes maximum time-production operation of the grinding process and minimum grinding unit consumption. At the same time, the failure of the grinding process is diagnosed, the safety of the grinding process is estimated, the grinding process is evaluated and analyzed, and the reasonable suggestion is given to the operation of the grinding process, thus assuring a continual, stable, safe and economical operation of the grinding process. The method can be widely used in the grinding process in the cement plant or in similar grinding processes in other fields.

The invention discloses a load coordination control method for a header system boiler, relating to the load coordination control method for boilers at power station. The invention solves problem of unstable vapor pressure in a main vapor pipe of the header system operation boiler adjusted by manpower currently and realizes an automatic adjustment of pressure of the main pipe. The pressure load of the main pipe in the system adjusts control mode of each boiler in coordination with DCS; then according to overall load demand of the system, load given value of each boiler is adjusted by increment and sent to the DCS of each boiler of the system; the adjustment method of the load given value of each boiler is that: when load difference of each boiler of the system is over big and the load needs increasing, the load given value of the boiler with minimum load needs increasing; when the load needs decreasing, the load given value of the boiler with maximum load needs decreasing and the given value is fixed. The load coordination control method for the header system boiler has the advantages of being able to effectively control fluctuation of the pressure of the main pipe within +/-0.1MPa.

The invention discloses a corrosion and scale inhibitor for treating circulating cooling water. The corrosion and scale inhibitor is composed of the following raw materials in percentage by mass: 3-15% of polyaspartic acid, 0-8% of organic phosphine, 2-10% of phosphine carboxylic acid, 5-10% of carboxyl group-containing polymer, 1-3% of copper corrosion inhibitor, 0-16% of zinc salt and the balance of water. The corrosion and scale inhibitor disclosed by the invention is low in phosphorus content and biodegradable, and no water body eutrophication is caused by pollution discharge; the corrosion and scale inhibitor has excellent corrosion and scale inhibition properties and can effectively improve the heat exchange effect of a central air conditioning refrigerating unit when being applied in a central air conditioning circulating cooling water system, the average temperature difference of a condenser is not larger than 1.0 DEG C and the average temperature difference of an evaporator is not larger than 2.4 DEG C, and thus safe, stable and economical operation of the unit is ensured.

The invention discloses a wastewater treatment energy conservation optimization method based on an improved local search immune genetic algorithm. The method comprises following steps: designing a proportional-integral controller for dissolved oxygen concentration in an aeration tank and nitrate nitrogen in an anoxia pool; determining an energy conservation optimization function and an energy conservation target in consideration of water output and energy consumption; proposing an improved local search immune genetic algorithm; solving dynamically controlled set values of dissolved oxygen and nitrate nitrogen; minimizing and optimizing energy consumption cost on the premise that the water output satisfies the emission standard. According to the method, the improved local search immune genetic algorithm is adopted; an optimized target function with minimum blowing machine energy consumption and pumping energy consumption and with wastewater quality being as a constraint is established; a cycle time of a quarter of a day which is used as the controller reference value is seen as the controlled object, and a dynamically adjusted optimizing strategy is carried out; optimized results of the local search immune genetic algorithm are added to the off-line solving of the controller reference values, and therefore, energy consumption in wastewater treatment is remarkably reduced on the premise that water output quality is guaranteed.

The invention discloses a diesel power generation system applied to an isolated sea island microgrid. The diesel power generation system applied to the isolated sea island micro-grid comprises a controller, a monitoring system, a switch device and a protecting and monitoring device, wherein the controller integrates a grid connecting function, a machine connecting function, a multi-machine load distributing function, a unit quiescent load operation function, a generator power adjusting function, a data acquisition function, a display function and a remote communication function and adjusts the parameters of a speed controller and the parameters of a voltage regulator in a digital control mode, the monitoring system is used for monitoring the controller, a power system and an oil circuit system and displaying, the switch device comprises a remote communication interface and an electric operating mechanism, and the protecting and monitoring device comprises a remote communication interface and is used for conducting protection according to the state of a diesel generating unit. According to the diesel power generation system applied to the isolated sea island micro-grid, a communication protocol of the diesel power generation system is converted into a communication mode adaptable to the isolated sea island micro-grid through a protocol converting device, and information interaction is carried out between the diesel power generation system and the micro-grid through a data switching exchanger. Due to the fact that the diesel power generation system is obtained through the improvement of a traditional diesel power generation system in the power supply mode of the isolated sea island micro-grid, and cost and investment of micro-grid project construction are saved.

The invention relates to a method for removing O2, N2 and dimethyl ether from olefin streams, mainly solving the problems that in the MTO (methanol to olefin) product separation process in the prior art, the operating temperature is high, olefin is easy to polymerize, the olefin loss is large, the existence of O2 which results in poisoning of a C2 hydrogenation catalyst and enters the olefin product to influence the product quality is not considered, and the existence of N2 results in high cold amount consumption of a demethanizer. The method provided by the invention comprises the following steps: (a) an olefin stream I containing O2, N2, CH4, ethylene, ethane, propylene, propane, dimethyl ether and C4+ hydrocarbon is provided; (b) the olefin stream I enters the demethanizer, a stream II is obtained from the tower top, and a stream III is obtained from the tower bottom; (c) the stream III enters a dethanizer, a stream IV is obtained from the tower top, and a stream V is obtained from the tower bottom; and (d) the stream V enters a depropanizer, a stream VI is obtained from the tower top, and the dimethyl ether and the C4+ hydrocarbon are obtained from the tower bottom. The technical scheme better solves the problems and can be applied to the industrial production of olefin from oxygen-containing compounds.

The invention is a depth-type sand filter, the size of sand gradually diminishing with the flow direction of the normal filtering fluid. It leads the fluid to the inlet of the sand filter through the pipeline, firstly holds back big suspension through big sand area, then holds back medium suspension through medium sand area, finally eliminates most fine suspension through fine sand area, and then makes the fluid flow out from the outlet. It is composed of wall body, filtering sand and ground leak; the wall body is set with inlet and outlet, the ground leak is set under the wall body, the filtering sand is spread in the liquid flow direction in turn according to the size. It can adopt upflow and downflow modes. It can stably and economically run in a wide range. It is applied to economical sand filtering field, especially the field where the sand filter is used infrequently or discontinuously.

A counter flow type heat exchanger provided with flat tubes comprises the flat tubes and fins, wherein sealing strips are mounted on two sides of each fin; the flat tubes and the fins are arranged alternatively in parallel; and the flowing directions of the flat tubes are parallel to the flowing directions of the fins outside the flat tubes, so that counter flow heating exchange is formed. The counter flow type heat exchanger provided with the flat tubes is compact in structure, small in occupied space, high in pressure resistance grade and wide in application range and can be used for an evaporator and a condenser taking carbon dioxide as a refrigerant, particularly large-scale heat exchange capability can be formed, the counter flow type heat exchanger is applicable to an evaporator and a condenser of a central air conditioner, the efficient evaporator and condenser allowing the refrigerant to pass through micro channels and water to flow from the outside of the micro channels are obtained, and energy is saved.

The invention discloses a fuzzy PID type bionic boiler energy-saving control system, which includes a control room, an on-site parameter collection device and a controlled site. The photoelectric isolation device is connected to the boiler control center station; the control room includes the boiler control center station, photoelectric isolation device, frequency converter, hand-held device, control console, industrial computer and printer, frequency converter, hand-held device, control console, and industrial computer Both the printer and the boiler control center station are connected, and the controlled site includes the combustion control system, the water supply control system and the furnace pressure control system. The invention guarantees the safe, stable and economical operation of the boiler, realizes the intelligentization of the boiler, automatic optimization control, and achieves the purposes of protecting the environment, greatly improving the combustion efficiency of the boiler, and saving energy.

The invention discloses a flow-equalizing self-stabilization air quantity measuring device, relates to an air quantity measuring device, and aims to solve problems of high fluctuation of measurement results, poor stability and inaccurate measured data of a measuring device due to the fact that an existing pulverizing system of a boiler is compact in arrangement, mounting space for an inlet of a coal mill is narrow, the measuring device is mounted difficultly and the air quantity of the inlet of the coal mill is uneven and unstable. A first ventilating duct, an air flow equalizer and a second ventilating duct of the flow-equalizing self-stabilization air quantity measuring device are linearly arranged and are sequentially communicated with one another, a plurality of spacers are fixedly connected into a flow equalizing area, a through hole is machined on a side wall of a testing area of the air flow equalizer, a speed testing tube penetrates through the through hole, portions of a tube body of the speed testing tube positioned outside the side wall of the testing area are respectively communicated with two differential pressure tubes and two cleaning air tubes, the speed testing tube is provided with a plurality of air inlet holes positioned on the side wall of the tube body in the testing area, a temperature transmitter is arranged inside the air flow equalizer, and a pressure transmitter is perpendicularly mounted on the outer side wall of the air flow equalizer. The flow-equalizing self-stabilization air quantity measuring device is used for measuring air quantities of inlets of coal mills.

The invention provides a wet type static solid strip-shaped anode dust collecting plate. The strip-shaped anode dust collecting plate is characterized in that a pole plate is composed of solid strip-shaped bodies, the strip-shaped bodies are horizontally arranged and are woven through ropes or connected by a single layer of plywood, necessary gaps are formed among the strip-shaped bodies, and the sizes of the gaps are determined by liquid holdup, surface tension, liquid film thickness and solid-liquid characteristics. The strip-shaped anode dust collecting plate provided by the invention has the advantages that a horizontal water film is uniform by virtue of the capillary phenomena of the gaps; the gaps internally contain liquid to increase the liquid holdup of the pole plate so as to keep a liquid film stable; the gaps can penetrate through the two sides of the pole plate and can transmit the pressure fluctuation of airflow on the two sides of the pole plate, then the water film is driven to vibrate, and thus dust is prevented from precipitating on the pole plate.

The invention discloses an electric power system static state estimation method considering PMU branch current phasor. The method is characterized by, to begin with, listing measurement equations according to known data in a system; then, configuring a PMU device to the system according to a requirement for enabling the system to reach observability after calculation; and applying the data obtained by the PMU to the system. The method, mainly based on the PMU data and supplemented by supplement of SCADA data and PMU pseudo-measurement data obtained after measurement transformation as well as PMU-similar data to data of a PMU observability insufficient point, enables the system reach observability, so that the estimation precision of the system is improved. The method can obtain accurate data under the condition of configuring less PMU data, and by making full use of the PMU measurement data, can carry out state estimation better.

The invention provides a distributed control method and device of micro-grid cost optimization. The method comprises the steps of S1, obtaining a local output voltage and current, and obtaining an output voltage and current of an adjacent micro-source; S2, based on a cost optimization control strategy, calculating the power and the tiny-increasing rate of each micro-source, and making the tiny-increasing rate of the local micro-source be equal to that of the adjacent micro-source through PI adjustment to ensure that the cost of the micro-grid is the lowest. According to the distributed control method and device of the micro-grid cost optimization, through the cost optimization control strategy, it is guaranteed that a generator with a low cost in a system has a preferable generation right; by constructing a Lagrangian function, an optimal generation power of each micro-source is obtained, and through the PI adjustment, the tiny-increasing rate of all micro-sources in the micro-grid is identical, so that the total generation cost of the whole system is made to be the lowest. On this basis, based on the distributed voltage recovery strategy, through the PI adjustment, an output voltage value of each micro-source is equal to an output voltage reference value, and voltage recovery is thus conducted.

The invention discloses a method for detecting the stability and the economic property of a mining main ventilator in real time. The method comprises the following steps: 1, an air volume sensor detects the air volume of the main ventilator in real time, and a data acquisition device acquires a real-time air volume signal detected by the air volume sensor and transmits the signal to a computer in real time; 2, the computer receives the real-time air volume signal transmitted by the data acquisition device, and compares the real-time air volume signal with a main ventilator stability and economic property evaluation model when the rotating speed, pre-constructed by the computer, of the main ventilator is n minute to obtain a comprehensive stability and economic property operation state of the main ventilator. According to the method, the steps are simple, and the method is convenient to implement and low in cost; the stability and the economic property of the main ventilator are effectively combined together, so that the stable and economic operation of the main ventilator can be realized favorably, and the use effect is good.

The invention discloses a surface ash clearing device of a pipe heat exchanger. The clearing device comprises a heat exchanger pipe bundle arranged in a smoke channel, a dust-removing hole plate, a driving connection rod, a smoke resistance sensor, a motor and a controller. The dust-removing hole plate is provided with a plurality of through holes, a heat exchanger pipe outer ring of the heat exchanger pipe bundle respectively penetrates through the through holes, two ends of the driving connection rod are respectively connected with the dust-removing hole plate and a motor rotating shaft, the output end of the controller is connected with the control signal input end of the motor, the smoke resistance sensor is arranged in the smoke channel, and the signal output end is connected with the signal input end of the controller. The clearing device is capable of effectively and conveniently clearing surface ash of heat exchanger pipes, avoids the shortcoming of a traditional ash blowing mode, and ensures stable and economical operation of a boiler.

The invention provides a rail transit operation and maintenance management system based on a micro-service architecture, and the system comprises an infrastructure-as-service layer, which provides rail transit business data for an application-as-service layer, through a deployed first micro-service, and responds to an operation and maintenance management control instruction; and the application-as-service layer which calls a second micro-service correspondingly deployed by a service module associated with the rail transit service data to perform service processing, provides service processinginformation display and operation and maintenance management control instruction operation prompts for the user through the front-end service application, and returns an operation and maintenance management control instruction to the infrastructure-as- service layer. According to the scheme provided by the embodiment of the invention, by reasonably designing the micro-service architecture, key facilities and equipment in rail transit are subjected to omnibearing whole-process management and control, different operation and maintenance requirements of rail transit operation and maintenance management can be met by deploying different micro-services, the management level of operation and maintenance management is improved, and normal, safe and efficient operation of the facilities and equipment is guaranteed.

The invention relates to a coal-fired unit source network win-win frequency adjusting method based on a UCPS. The method includes the following steps that firstly, when power grid frequency is smaller than a set low frequency value or ACE is smaller than an allowable value, a control system makes generator unit locking or weakening output be reduced; secondly, when the power grid frequency is higher than a set high frequency value or the ACE is smaller than the allowable value, the control system makes the generator unit locking or weakening output be increased; thirdly, when the power grid frequency is smaller than the set low frequency value or the ACE is smaller than the allowable value, the unit with high energy releases energy so as to reach to a balance state, and meanwhile outputs more electric energy to a power grid; fourthly, when the power grid frequency is higher than the set high frequency value or the ACE is smaller than the allowable value, the unit with low energy accumulates energy so as to reach to the balance state, and meanwhile outputs less electric energy to the power grid. Compared with the prior art, the coal-fired unit source network win-win frequency adjusting method has the advantages that under the condition that safety of coal-fired units is guaranteed, power grid power and frequency control auxiliary service requirements are met, and meanwhile stable and economical operation of the generator units is kept.

The invention discloses a multi-FACTS (flexible alternating-current transmission system) structure based chain structure high-voltage grid security control method. The chain structure high-voltage grid security control method mainly comprises establishing a power system model and a dynamic element model on the basis of transient stability; establishing a coordinated optimization model considering coordination among multiple FACTS for the chain structure high-voltage grid on the basis of the power system model and the dynamic element model; and solving the optimal solution of the coordinated optimization model. The multi-FACTS structure based chain structure high-voltage grid security control method can overcome the defects of low reliability, poor coordination and stability and the like in the prior art and has the advantages of high reliability, good coordination and stability.

The invention belongs to the technical field of automatic instruments and apparatuses, and provides a multi-stage scheduling automation system. The system comprises a first-stage automatic monitoringmodule, a second-stage automatic monitoring module, a third-stage automatic monitoring module and a fault monitoring module. The multi-stage scheduling automation system is designed to realize the data acquisition of different equipment and different acquisition modes. Meanwhile, acquired data are transmitted to a data management center, so that the centralized management of data is realized. Different clients can browse data in respective authority ranges according to the authorities of the clients. As a result, the management and the maintenance of database data are facilitated.