typical control circuits for shunt and series motor

... mathematical model for the VCS with electromagnetic drive and power converter control circuits for its optimal control DESPOTOVIC ´ AND STOJILJKOVIC ´ : POWER CONVERTER CONTROL CIRCUITS FOR TWO-MASS ... for mathemat- ical model formulation and for further research of both the phase angle control and switch mode control behavior for the electromagnetic vibratory conveying drive. Simulations and experimental ... voltage controlled os- cillator and controller output. This reference value is determi- nated by reference inputs, for amplitude and duration and for frequency. Both of these signals are controlled...

Ngày tải lên: 03/01/2014, 19:16

... 5-815-1 AIR FORCE AFR 19-6 AIR POLLUTION CONTROL SYSTEMS FOR BOILERS AND INCINERATORS DEPARTMENTS OF THE ARMY AND THE AIR FORCE MAY 1988 Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com ... substantially as follows: :Joint Departments of the Army and Air Force, U.S., Technical Manual TM 5-815-1/AFR 19-6, AIR POLLUTION CONTROL SYSTEMS FOR BOILERS AND INCINERATORS." If the reprint or republication ... not support combustion. Air for this type of incinerator is provided by a forced draft fan and is controlled by dampers in order to provide the proper distribution. Controlled-air incinerators...

Ngày tải lên: 20/06/2014, 17:20

... costs for the particular area should be used. The capital and operating costs of boiler and emission control equipment vary greatly depending on the type of fuel to be used. The method and cost ... fuel. Natural gas, and to a limited extent liquid petroleum (butane and propane) are ideally suited for steam generation because they lend them- selves to easy load control and require low amounts ... residues, noncombustibles, and sulfur. Analyses of gaseous fuels may be found in "Perry's Chemical Engineering Handbook”. d. Bark and wood waste. Wood bark and wood waste, such as sawdust, chips and shavings,...

Ngày tải lên: 20/06/2014, 17:20

... characterize pollutants for design controls. b. Consultation on test performance standards and witnessing tests. c. Testing of installed air pollution abatement equip- Simpo PDF Merge and Split Unregistered ... separating force for the same inlet velocity and a shorter distance for the parti- cle to migrate before reaching the cyclone walls. These units may be used singly or arranged in parallel or series ... Agency Regulations on Standards of Perform- ance for New Stationary Sources, 40 CFR 60 and subsequent revisions. The techniques are listed in table 5-1. 5.3 Meteorological and ambient air mea- surement a....

Ngày tải lên: 20/06/2014, 17:20

... gases, and the operating temperature of the cyclone. Generally, cyclones are constructed of mild steel or cast iron. (See para 7-5 for additional information on materials selection for pollution control ... effluent treatment and disposal are a. Particulate removal. Scrubbers may be used as control devices on incinerators and boilers for fly ash collection. The plate, spray, venturi, and moving bed types ... Construction of this for doing this are illustrated in figure 7-5. scrubber is more complex due to the neces- This can be used to control performance sity of the fan operating in a wet and possibly under...

Ngày tải lên: 20/06/2014, 17:20

... Merge and Split Unregistered Version - http://www.simpopdf.com TM 5-815-1/AFR 19-6 8-6 b. High voltage transformer. The standard iron core rectifiers is used for lower rated current sets, typically transformer ... amount of voltage or power input, and precipitator. Transformers are designed to withstand to control the effects of sparking. The most modern high ambient temperatures and electrical variations method ... sparking. For high temperature operation, of silicon controlled rectifiers (SCR). Other modern the most common transformer cooling method is liquid control devices are saturable reactors and thyristors immersion....

Ngày tải lên: 20/06/2014, 17:20

... inertness teristics for certain dusts and fumes, and resistance to dry and moist heat especially with less vigorous cleaning degradation, make Teflon suitable for methods. filtration and dust collection ... high and with variable dust load- ings, correct fabric pressure drop is critical for proper operation and maintenance. Simple draft gages may be used for measuring fabric pressure drop, and they ... capital charges, and operating and maintenance costs. (9) With the original fuel as a baseline, compare emissions and costs for alternate fuels. (g. Modification to boiler operations and mainte- nance. (1)...

Ngày tải lên: 20/06/2014, 17:20

... unbal- anced; and to compensate for instrument lag between operational changes. Practical minimums of excess air are 7 percent for natural gas, 3 to 15 percent for oil firing, and 18 to 25 percent for ... combustion control system to regulate and monitor the exact proportioning of fuel and air. For pulverized coal fired boilers, this may mean the additional expense of installing uniform distribution ... peak tem- peratures and contribute to reduced NO emissions. x g. Mass transportation and mixing. The con- centration of nitrogen and oxygen in the combustion zone affects NO formation. Any means...

Ngày tải lên: 20/06/2014, 17:20

... auxiliary equipment for the fluidized bed boilers. (1) Materials handling for fuel and limestone. The handling of fuel and limestone will vary depending on the source of supply and the type of delivery. ... National Primary and Secondary Ambient Air Quality Standards Part 60, Title 40, Code of Federal Regulations Environmental Protection Agency Regulations on Standards of Performance for New Stationary ... ash f. Ash-handling systems. (13) Broad tolerance to changes in coal quality (1) The ash-handling systems are similar to ash- (14) Sulfur removal w/o need for scrubbers handling systems for conventional...

Ngày tải lên: 20/06/2014, 17:20

... TECHNIQUES 5-1. Criteria standards. For the determination of possible violations In order to evaluate the nature and magnitude of air pollution, establish remedial measures, and determine control programs, ... Agency Regulations on Standards of Perform- ance for New Stationary Sources, 40 CFR 60 and subsequent revisions. The techniques are listed in table 5-1. 5.3 Meteorological and ambient air mea- surement a. ... recommended technique for obtaining the most reliable information concerning the variation of pollutant concentration in the real atmosphere. Discrete sampling can be used for plume tracking and random checking. Discrete...

Ngày tải lên: 27/06/2014, 17:20

... a standards and guidelines for a particular application pollution control device will be required. The technical and/ or supplementary standards for guidelines which and cost selection of control ... unique for Guide for Architects; and handbooks prepared by each particular site, and usually warrant expert con- government agencies such as the Naval Facilities sultation. If emission rates for ... different number. ARMY TM 5-815-1 AIR FORCE AFR 19-6 AIR POLLUTION CONTROL SYSTEMS FOR BOILERS AND INCINERATORS DEPARTMENTS OF THE ARMY AND THE AIR FORCE MAY 1988 REPRODUCTION AUTHORIZATION/ RESTRICTIONS This...

Ngày tải lên: 06/08/2014, 01:21

... costs for the particular area should be used. The capital and operating costs of boiler and emission control equipment vary greatly depending on the type of fuel to be used. The method and cost ... fuel. Natural gas, and to a limited extent liquid petroleum (butane and propane) are ideally suited for steam generation because they lend them- selves to easy load control and require low amounts ... residues, noncombustibles, and sulfur. Analyses of gaseous fuels may be found in "Perry's Chemical Engineering Handbook”. d. Bark and wood waste. Wood bark and wood waste, such as sawdust, chips and shavings,...

Ngày tải lên: 06/08/2014, 01:21

... source than before it was added. In the absence of pollutant reductions at an existing source which is within administrative control, it may be necessary to negotiate for, and probably pay for, emission ... tasks and steps required for a per- mit and estimate the costs and time incre- ments involved in the review process. Coordinate the New Source Review schedule with the facility planning schedule and ... Agency Regulations on Standards of Perform- ance for New Stationary Sources, 40 CFR 60 and subsequent revisions. The techniques are listed in table 5-1. 5.3 Meteorological and ambient air mea- surement a....

Ngày tải lên: 06/08/2014, 01:21

... separating force for the same inlet velocity and a shorter distance for the parti- cle to migrate before reaching the cyclone walls. These units may be used singly or arranged in parallel or series ... particles series. may affect the performance of a secondary collector. d. Coarse particles. when cyclones handle coarse TM 5-815-1/AFR 19-6 6-3 TM 5-815-1/AFR 19-6 6-2 efficiency curves for handling ... gas inlet design and dust discharge design, their gas handling capacity and collection efficiency, and their arrangement. Figure 6-2 illustrates the various types of gas flow and dust discharge...

Ngày tải lên: 06/08/2014, 01:21

Ngày tải lên: 06/08/2014, 01:21

Ngày tải lên: 06/08/2014, 01:21

Ngày tải lên: 06/08/2014, 01:21

Ngày tải lên: 06/08/2014, 01:21

Ngày tải lên: 06/08/2014, 01:21

Ngày tải lên: 06/08/2014, 01:21