31results about How to "Stable operating parameters" patented technology

The invention discloses an environment-friendly hemp film preparation device. The whole set of equipment includes two feeding machines, mixing machine, rough opener, fine opener, vibrating air pressure feeding box, carding machine, mechanical cross-lapper, air-laid machine, impregnation machine, drying cylinder type pre- Drying machine, pneumatic double-roll calender, surface spray coating machine, drying drum drying and setting machine, drafting trimming and coiling machine and other operating unit machines. Each unit machine adopts frequency conversion speed regulation and synchronizer to implement electrical control, and each unit machine can run independently at high speed, or the whole set of equipment can be linked to run. The present invention has the advantages that hemp fibers are transported by air flow pipeline between the rough opener, fine opener and carding machine, and the supply of raw materials is continuous; the second combination of mechanical laying and air-laid netting forms a net, and the net surface density of the hemp film is small , Uniform strength and stable quality; spray uniform coating on both sides of hemp mulch film, can produce hemp mulch film with different functions and uses; realize continuous and stable fully automatic production of hemp mulch film.

The invention relates to a method for the optimization of operation and control of energy conservation for a reserve ball-grinding powder system. Firstly, a non-linear neural network model about the consumption of powder of a powder-making system and operating parameters is established through collecting the service data of the powder-making system, then the negative pressure and the temperature at the entrance of a coal mill and the temperature at the outlet of the coal mill are obtained through the non-linear optimization with restricted conditions as a set value for controlling the system,wherein, the negative pressure, the temperature at the entrance and the outlet lead to lower consumption of powder; the entire optimized controlling of the powder-making system is carried out throughthe intelligent control of rotation of the coal mill and multivariable decoupling control of parameters at the entrance of the coal mill based on the operating experience as well as an intelligent down draft control technology, so as to ensure that the powder-making system strictly runs at an optimal condition and effectively reduces the powder consumption. The method provided by the invention caneffectively inhibit the fluctuations of a primary air pressure in the on / off process of the powder-making system, put an end to serious accidents such as flameout in a boiler caused by down draft andeffectively reduce the operating intensity for the staff.

The invention belongs to the technical field of automatic control of a thermal power plant, in particular to a control method of coal mixed combustion of a direct blowing thermal power generating unit, which can be used for the automatic control of the direct blowing thermal power generating unit when different coals are combusted. When the coal mixed combustion of the thermal power generating unit is realized, the rapidity requirement of automatic generation control (AGC) of a power grid can be satisfied, the safety and stability of primary control parameters can be realized, and the adaptive capacity of the unit to the quality variation of coals is improved. By using the control method, after the coal mixed combustion of the direct blowing thermal power generating unit is realized, the variable load capacity of the unit is improved, and the primary operating parameters of the unit are stabilized by controlling a single coal grinding mill. The control method has the obvious advantages that the variable load capacity of the unit is improved, the AGC requirement of power grid dispatch is satisfied, the stability of the primary operating parameters of the unit is enhanced, the coal adaptability of the unit is increased, and the coal cost can be effectively reduced.

A control method capable of promoting supercritical units to participate in wind power consumption belongs to the field of wind power unit tuning control. The invention aims to solve the problem that the existing supercritical unit control technology cannot quickly and accurately supplement the heat storage required by the unit to track large-scale power changes under the premise of ensuring the stability of the internal operation parameters of the unit. The present invention periodically collects wind power signals, uses the collected wind power signals to construct a periodic boiler input acceleration signal BIR, and adds the constructed boiler input acceleration signal BIR to the boiler load command BM; for the steam pressure deviation signal Δp T The absolute value of is compared with the threshold A; when |△p T |≤A, and △p T When ×△f<0, the grid source energy is in accordance with the trend, the steam turbine load command TM is corrected, and the corrected steam turbine load command TM′ is output to the steam turbine in the supercritical unit, when |△p T When |>A, the boiler load command BM added to the boiler input acceleration signal BIR is corrected to obtain the corrected boiler load command BM′. The invention is suitable for the use of the supercritical unit participating in the frequency regulation of the power grid.

A method for conveying large amount of raw material into furnace for directly burning to generate power includes cutting raw materials to be stubs then applying wind force to directly convey air and solid two-phase mixed flow formed by wind and raw material directly to internal phase zone of fluidized bed boiler through pipeline for burning to generate power, removing off sand and mud impurities while raw material is conveyed by wind force. The conveying system for realizing said method is also disclosed.

The invention discloses an integrated high-voltage intelligent phase selection permanent-magnetic circuit breaker, which comprises a controller, a master display, a voltage sensor, a current sensor, driving units sequentially connected in series to form a group of controlled elements, an execution mechanism, a vacuum switch and a temperature sensor, wherein three groups of controlled elements areincluded; the execution mechanism is a bi-stable permanent-magnetic mechanism; a driving mechanism of any one of bi-stable permanent-magnetic mechanisms is provided with two position sensors; and thecontroller comprises a single chip, a DSP and an FPGA. The controller, the driving units, the execution unit and the vacuum switch are encapsulated together, so the phase can be automatically detected in the presence of external trigger signals, and the execution mechanism can be driven to accurately and errorlessly switch on or switch off a reactive compensation device at the predetermined phase.