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

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 through the 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 can effectively 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 and effectively reduce the operating intensity for the staff.

The invention relates to an integrated electrolysis nitrogen and phosphorus removal wastewater treatment method, which realizes to remove the nitrogenous and phosphorus nutrition salt and organic pollutants in wastewater in same electrolytic tank. The invention adopts graphite and iron plate as electrodes, alternates electrolysis phosphorus removal and electrolysis nitrogen removal process by alternating the electrode polarities to remove the nitrogenous and phosphorus nutrition salt and organic pollutants in wastewater. The invention performs optimization and integration according to the change characteristics of the parameters including electrolysis time, current density, pH value, pollutants removal rate in the electrolysis phosphorus removal and electrolysis nitrogen removal process, can remove the nitrogenous and phosphorus nutrition salt and organic pollutants in wastewater in high efficiency in short time without adding any medicament in the process, achieves the advantages of small occupation area, short treatment time and high pollutants removal efficiency.

The invention discloses an artificial wetland system taking oyster shell-waste brick-zeolite as composite filler. The invention relates to a sewage treatment device, and discloses an artificial wetland ecological treatment device applicable to the treatment of various sewages such as domestic wastewater, livestock and poultry breeding wastewater and landfill leachate. The system disclosed by the invention comprises a vertical undercurrent artificial wetland device and wetland filler, wherein the wetland filler is implemented in a large particle size grading difference 'obverse and reverse particle size mixing' filling mode and taking oyster shell, waste bricks and zeolite which are large in specific surface area, good in nitrogen and phosphorus adsorption capacity and high in volume of organism holding, so that the sustainable, efficient and stable operation of an artificial wetland ecosystem is ensured. The artificial wetland system disclosed by the invention has the advantages of low cost, low energy consumption, high nitrogen and phosphorus removal efficiency, small land-occupied area, simple structure, convenient operation management and the like, is not easy to jam, and can be combined with ecological construction and urban greening functions.

The invention relates to a device for waste heat recovery based on control over outlet smoke temperature. According to the device, a smoke adjusting baffle and a bypass flue are arranged in an original flue and a temperature sensor is arranged in the flue; the bypass flue is communicated with a smoke heat exchanger and the smoke heat exchanger is connected with a steam pocket; the steam pocket is communicated with an air heat exchanger in an air side flue through a saturated steam output pipe and the air heat exchanger is further communicated with the steam pocket through a condensate water input pipeline so that circulation can be formed; a condensate water circulation pump is arranged on the condensate water input pipeline; a liquid level sensor is arranged on the air heat exchanger; the steam pocket is provided with a steam pocket pressure sensor. The outlet smoke temperature is controlled by the adjusting baffle, smoke is shunted by the adjusting baffle, and therefore it is guaranteed that the temperature of the discharged smoke is stabilized at a set value; according to control over the steam pressure of the steam pocket, the backflow speed of condensate water is controlled to control the heat exchange area of a heat exchange system, and therefore control over the heat exchange power of the heat exchangers is achieved.

The invention belongs to the technical field of heating and ventilation systems, and particularly relates to a cleaning area ventilation system and a differential pressure adjusting method. The cleaning area ventilation system comprises a plurality of first partition plates, a plurality of second partition plates, a plurality of air treatment units, a plurality of air conveying valves and a plurality of air inlet valves, a cleaning area is divided into a plurality of partitions by the first partition plates, each partition is divided into a plurality of cleaning chambers by the second partition plates, each cleaning chamber is provided with an air inlet and an air outlet, the air treatment units are in one-to-one correspondence to the partitions, each air treatment unit comprises an air conditioning unit, an air conveying pipeline and an air returning pipeline, the air conveying valves are in one-to-one correspondence to the air treatment units, each air conveying valve is used for controlling the air amount conveyed by the air conditioning unit into the air conveying pipelines, the air inlet valves are in one-to-one correspondence to the cleaning chambers, and each air inlet valveis used for controlling air amount conveyed by the air conveying pipeline into the cleaning chambers. The cleaning area ventilation system conveniently adjusts differential pressure of the cleaning chambers, time and labor are saved, and production efficiency is improved.

The invention provides an air conditioner frequency control method and an air conditioner, and relates to the technical field of air conditioners. A limiting frequency Fmax is set by using a first difference value delta T1 between an indoor temperature Tai and a set temperature Ts; and a compressor is controlled to operate at the limiting frequency Fmax to prevent operation of the air conditionerat the highest frequency under any conditions. Compared with the prior art, the operation frequency upper limit of the compressor can be determined according to the difference value between the indoortemperature and the set temperature, namely actual refrigeration/heating load, so that the cold/heat demands can be met, and meanwhile, the energy consumption can be saved as much as possible.

The invention relates to a coal-charging and coke-discharging flue gas integration dust-removal process for a side coal-charging coke oven. A two-way connector valve is arranged on an oven column for the coke oven, the flue gas generated during the coal charging process of the coke oven and the flue gas generated during the coke discharging process of the coke oven enter in a common flue gas pipeline respectively through the two-way connector valve, and the dust removal is performed through a filtering type flue gas dust-removal device connected with the flue gas pipeline; the tar adsorption adopts a method that active powder adsorbent is sprayed in the flue gas pipeline, and the flue gas is discharged into atmosphere through a ventilator after being filtered and purified in a filtering type flue gas purification device; and the filtering type flue gas purification device performs off-line dust-cleaning regeneration after finishing coke discharging until the next coke discharging of the coke oven. No dust deposits in the process pipeline, the tar adsorption is complete, the dew point is not reached, the filter bag dust-cleaning regeneration is good, and the system is reliable and stable, thereby effectively ensuring the normal running of the coke oven with flue gas dust removal.

The invention relates to a synchronous degradation process and device for COD (Chemical Oxygen Demand) and N (Nitrogen) of high concentration wastewater in a same pool. Two aerating devices are arranged at the bottom of a biochemical pool which is divided into a first cell aerating area and a second cell aerating area with different dissolved oxygen control by a functional separating wall. Wastewater and a return liquid are mixed and aerated at the water inlet of the first cell aerating area, the mixed liquid at the tail end of the first cell aerating area flows into the second cell aerating area and is aerated, and degradation of COD and N is carried out in the first and second cell aerating areas. A part of mixed liquid at the tail end of the second cell aerating area returns to the water inlet of the first cell aerating area while the other part flows into a cement separating device. Cleaned water after cement separation is discharged. The dissolved oxygen control range of the first cell aerating area is 0.1-0.5mg/L, the dissolved oxygen control range of the second cell aerating area according to property of wastewater is 0.1-1.8mg/L. The invention has the benefits that the COD removal efficiency of the biological synchronous denitrification process is improved, synchronous degradation of COD and N in the same pool is realized, and the process can be applied to domestic wastewater treatment. Therefore, the invention is more applied to high concentration industrial wastewater treatment with COD and N.

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.

The invention discloses two-stage backflow simultaneous nitrogen and phosphorus removal device and technology for denitrification phosphorus removal, shortcut nitrification and anaerobic ammonia oxidation of municipal sewage, and belongs to the field of sewage treatment. Municipal sewage enters an anaerobic/anoxic reactor after passing through a regulating reservoir; phosphorus-accumulating bacteria finish storage and phosphorus release of polyhydroxybutyrate (PHB) by using inflow chemical oxygen demand (COD) under an anaerobic condition; phosphorus-rich supernatant enters inside a middle reservoir through a water decanter, and is injected into a moving bed membrane bioreactor by a lift pump after the water quantity is adjusted; autotrophic nitrogen removal of the shortcut nitrification and anaerobic ammonia oxidation is achieved by alternate operation of low-oxygen aeration and anoxic agitation; the processed effluent enters the anaerobic/anoxic reactor again under the action of a suction pump; denitrification phosphorus removal is achieved after phosphorus-accumulating sludge containing the PHB and autotrophic denitrification effluent containing nitrate nitrogen are mixed. Simultaneous nitrogen and phosphorus removal of low-carbon municipal sewage is achieved by using coupling of three functional microorganisms for denitrification phosphorus removal, shortcut nitrification and anaerobic ammonia oxidation, and the two-stage backflow simultaneous nitrogen and phosphorus removal device has the advantages of being high-efficiency and energy-efficient, stable to run, and low in sludge yield.

The invention provides a control method capable of promoting a supercritical unit to participate in wind power dissipation, and belongs to the field of wind turbine set tuning control. The method aimsto solve the problem that an existing supercritical unit control technology cannot guarantee stable operation parameters in a unit, and the problem of heat storage needed for tracking the large-scalepower change of the unit can be rapidly and accurately supplemented. According to the method, the wind power signals are collected periodically, and the collected wind power signals are used for constructing a periodic boiler input acceleration signal BIR, and the constructed boiler input acceleration signal BIR is added into a boiler load instruction BM; and the absolute value of the steam pressure deviation signal delta pT is compared with a threshold value A; when |Delta pT|<=A, and Delta pT*Delta f(0, the energy of a power grid source is homeopathic, and the turbine load command TM is corrected, and the corrected turbine load command TM' is output to the turbine in the supercritical unit, and when |Delta pT|)A, the boiler load command BM added into the boiler input acceleration signalBIR is corrected, and the corrected boiler load command BM' is obtained. The method is suitable for the supercritical unit participating in grid frequency modulation.

The invention relates to recycling of afterheat of smoke of a steam boiler, and in particular relates to a device and method for recycling the afterheat of the smoke of the steam boiler that varies frequently in load. The device comprises at least one buffering water tank (1); a discontinuous water supply inlet (11) is formed in one side of the bottom part of the buffering water tank (1); a continuous circulating cold water outlet (13) connected with one side of a circulating water pump (2) is formed in the other side of the bottom part of the buffering water tank (1); the other side of the circulating water pump (2) is connected with an inlet of a heat exchanger (3); an outlet of the heat exchanger (3) is connected with a continuous circulating hot water inlet (14) at the other side of the top part of the buffering water tank (1); a discontinuous water supply outlet (12) is formed in one side of the top part of the buffering water tank (1). With the adoption of the device for recycling the afterheat, the energy saving efficiency can be raised by more than 9% compared with that of the whole original system.

The invention discloses a working mode switching control method of an electronic product circuit containing an FPGA, and the method comprises the steps of: performing switching to a second working mode after the FPGA is powered on under the condition that an operation parameter of the electronic product circuit is smaller than a first preset value needed by the operation of a first working mode, wherein the second working mode is used for correcting the operation parameter value based on an FPGA configuration circuit; performing switching to the first working mode when the operation parameteris corrected to the first preset value; and in the second working mode, enabling the FPGA configuration circuit to execute the working method. On the basis of judgment of the operating parameter, whenthe condition of entering the first working mode is not met, the operating parameter is corrected by switching to the second working mode until the condition of entering the first working mode can bemet, and then working is performed in the first working mode, so that the auxiliary effect of starting the first working mode is achieved, and the influence of the operation parameter on the first working mode is avoided.