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New Patents VII 5123739 METHOD OF MONITORING CEMENT KILN AND THE APPARATUS THEREFOR Takeyoshi Takenouchi, Masumi Nakagawa, Oumiya, Japan assigned to Mitsubishi Mining & Cement Company Ltd There is provided a method of monitoring a firing condition in a cement kiln, by measuring an intensity of spectrum of a radiation which radiation is emitted from a clinker being fired in a cement kiln, and processing the intensity of the spectrum to produce a parameter for monitoring the condition in the kiln, by correcting the in- tensity profile of the spectrum by interpolating a profile (range) which is deformed by the absorp- tion with alkali atom(s) in an atmosphere of the kiln. Further, the absorption intensity of the spectrum at a sodium absorption wavelength and potassium absorption wavelength should be continuously measured and corrected by inter- polating so as to produce a parameter for monitoring. An apparatus for monitoring a ce- ment kiln, comprises an optical head collector equipped at a kiln hood of the kiln, to collect a radiation from a clinker being fired in the kiln, an optical fiber for transmitting the collected radiation, a spectrophotometer for analyzing the collected radiation, which is connected to said optical fiber, and, a processor for processing said intensity of the spectrum measured by said spectrophotometer, outputing the processed data, and controlling the operation of the spectrophotometer. Further, the apparatus has said optical collector and said optical fiber mounted respectively on each of a plurality of the cement kilns, and a transfer switch(s) for selecting an optical head and an optical fiber connecting the kiln to be monitored, and then, a plurality of the cement kilns can be monitored. 5124363 AQUEOUS AIR FOAMS OF POLYHYDROXY POLYMER Richard M Stern assigned to Minnesota Mining and Manufacturing Company A method of treating hazardous material or other substrate with an aqueous air foam, com- prising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water- soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol struc- tures capable of complexation with the borate anion, B(OH)4-, (b) polyvalent ionic complexing agent, such as borax, which crosslinks said poly- mer by hydrogen-bonding complexation, (c) foaming agent to impart persistence to the fluid air foam generated upon aeration of said solu- tion or dispersion, (d) a pH modifier, such as sodium hydroxide or acetic acid, to impart an appropriate pH to the solution or dispersion necessary for time-controlled formation of gel- led or viscous air foam from the fluid air foam, and (e) water as the major component of said aqueous solution or dispersion by weight; (2) aerating said aqueous solution or air-entrained, low density foam (or air foam) which is gelable or becomes viscous, generally at least 5 seconds after its formation; and (3) spraying, contacting or otherwise applying said fluid, aqueous air foam to exposed surface of said hazardous material or other substrate. 5125572 HOT WATER HEATING CONTROL SYSTEM William Piegari assigned to General Electric Engineering Inc A hot water heat control system for a building having a given boundary layer heat loss charac- teristic is described. The heating system, which includes a water heating device, a water circula- tion loop, and a mechanism for varying the amount of heat to the loop, is controlled by a unique valve arrangement. In the best mode, the valve arrangement controls the water tempera- ture supplied to the perimeter heater in response sensed changes of ambient environmental condi- tions. In one system configuration, a controller is used to control the flow of heated circulating water in response to the sensed weather para- meters. The valve controller has a flow timer for variably establishing flow periodicity between a minimum flow time and a maximum flow time. The valve controller also has a base cycle timer for variably establishing base cycle periodicity between a minimum base time and a maximum base time. In this form of the system, a selector is provided, responsive to the building heat equip- ment, for selecting flow time and base cycle time. A valve operator operates in response to the valve controller and opens and closes the water control valve. The system includes zone monitoring for sensing a zone condition variable selected from wind effect, solar radiation effect, other boundary layer disturbances and the com- bined effect of two or more thereof. Thus, hot

5125572 Hot water heating control system

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Page 1: 5125572 Hot water heating control system

New Patents VII

5123739

METHOD OF MONITORING CEMENT KILN AND THE APPARATUS THEREFOR

Takeyoshi Takenouchi, Masumi Nakagawa, Oumiya, Japan assigned to Mitsubishi Mining & Cement Company Ltd

There is provided a method of monitoring a firing condition in a cement kiln, by measuring an intensity of spectrum of a radiation which radiation is emitted from a clinker being fired in a cement kiln, and processing the intensity of the spectrum to produce a parameter for monitoring the condition in the kiln, by correcting the in- tensity profile of the spectrum by interpolating a profile (range) which is deformed by the absorp- tion with alkali atom(s) in an atmosphere of the kiln. Further, the absorption intensity of the spectrum at a sodium absorption wavelength and potassium absorption wavelength should be continuously measured and corrected by inter- polating so as to produce a parameter for monitoring. An apparatus for monitoring a ce- ment kiln, comprises an optical head collector equipped at a kiln hood of the kiln, to collect a radiation from a clinker being fired in the kiln, an optical fiber for transmitting the collected radiation, a spectrophotometer for analyzing the collected radiation, which is connected to said optical fiber, and, a processor for processing said intensity of the spectrum measured by said spectrophotometer, outputing the processed data, and controlling the operation of the spectrophotometer. Further, the apparatus has said optical collector and said optical fiber mounted respectively on each of a plurality of the cement kilns, and a transfer switch(s) for selecting an optical head and an optical fiber connecting the kiln to be monitored, and then, a plurality of the cement kilns can be monitored.

5124363

AQUEOUS AIR FOAMS OF POLYHYDROXY POLYMER

Richard M Stern assigned to Minnesota Mining and Manufacturing Company

A method of treating hazardous material or other substrate with an aqueous air foam, com- prising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water- soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol struc-

tures capable of complexation with the borate anion, B(OH)4-, (b) polyvalent ionic complexing agent, such as borax, which crosslinks said poly- mer by hydrogen-bonding complexation, (c) foaming agent to impart persistence to the fluid air foam generated upon aeration of said solu- tion or dispersion, (d) a pH modifier, such as sodium hydroxide or acetic acid, to impart an appropriate pH to the solution or dispersion necessary for time-controlled formation of gel- led or viscous air foam from the fluid air foam, and (e) water as the major component of said aqueous solution or dispersion by weight; (2) aerating said aqueous solution or air-entrained, low density foam (or air foam) which is gelable or becomes viscous, generally at least 5 seconds after its formation; and (3) spraying, contacting or otherwise applying said fluid, aqueous air foam to exposed surface of said hazardous material or other substrate.

5125572

HOT WATER HEATING CONTROL SYSTEM

William Piegari assigned to General Electric Engineering Inc

A hot water heat control system for a building having a given boundary layer heat loss charac- teristic is described. The heating system, which includes a water heating device, a water circula- tion loop, and a mechanism for varying the amount of heat to the loop, is controlled by a unique valve arrangement. In the best mode, the valve arrangement controls the water tempera- ture supplied to the perimeter heater in response sensed changes of ambient environmental condi- tions. In one system configuration, a controller is used to control the flow of heated circulating water in response to the sensed weather para- meters. The valve controller has a flow timer for variably establishing flow periodicity between a minimum flow time and a maximum flow time. The valve controller also has a base cycle timer for variably establishing base cycle periodicity between a minimum base time and a maximum base time. In this form of the system, a selector is provided, responsive to the building heat equip- ment, for selecting flow time and base cycle time. A valve operator operates in response to the valve controller and opens and closes the water control valve. The system includes zone monitoring for sensing a zone condition variable selected from wind effect, solar radiation effect, other boundary layer disturbances and the com- bined effect of two or more thereof. Thus, hot

Page 2: 5125572 Hot water heating control system

VIII New Patents

water perimeter heating with zone condition variable compensation, is provided without using internal building temperature as a para- meter.

5125747

OPTICAL ANALYTICAL INSTRUMENT AND METHOD

HAVING IMPROVED CALIBRATION

Emile Sayegh, Eric F Mooney assigned to Tytronics Inc

Optical analytical instruments to determine a physical parameter of a fluid, and methods of operation of such instruments, are shown. These employ a source of suitable optical radiation, a detector means, means defining a zone for the fluid, means defining an optical path from the radiation source through the fluid zone to the detector means, and reading and control cir- cuitry. At least two readings of optical energy that has been influenced by the fluid are taken without there having occurred substantial change to the fluid. During one of the readings a filter of known absorbance is included in the op- tical path so that the respective reading represents a calibration reading. A calibration- value-determining means is constructed first to compare, effectively, the two readings to remove the effect of the fluid from the value of the calibration reading, second, to compare, effec- tively the residual value of the calibration reading to a known value based on the known absorbance of the filter, and, third, on the basis of the second comparison, to make a calibration adjustment based on values derived while the fluid sample remained unchanged in the fluid zone. Novel software implementations of the determinations are shown. Specific examples of instruments and methods implementing these features shown are a dual lamp, no-moving part in-line spectrophotometer, a no-moving part reflection colorimeter capable of on-line or off- line operation, a scatter or fluorescence detecting implementation and a turbidimeter.

5126567

ELECTRET GAMMA[X-RAY LOW LEVEL DOSIMETER

John C Dempsey, Lorin R Stieffassigned to Rad Elec Inc

A small enclosed ion chamber with an elec- trostatically charged electret attached to the in- ner chamber wall. Filtered holes in the chamber permits radon in the ambient air in the chamber to enter or exit by diffusion. Positive or negative ions (depending on the polarity of the electret charge) formed in the chamber air by the passing of gamma radiation or X-rays move to and col- lect on the electret surface by virtue of its elec- trostatic attraction to ions of opposite polarity. These ions neutralize the ions of opposite polarity on the electret and cause a measurable reduction in its surface voltage which reduction is proportional to the dose of gamma and/or X- ray incidence on the chamber. The reduction of the electret surface voltage is used to calculate the dose of gamma or X-ray radiation incident upon the chamber during a known exposure period. In one embodiment, a sealed radioactive- gas-tight flexible-wall container, such as a bag, surrounds the chamber to prevent any ambient radon from entering the ion chamber. In addi- tion, an absorbent such as activated charcoal can be included in the bag to remove any radon cap- tured within the sealed chamber. Removal of this radon removes its undesirable contribution to the gamma/X-ray dose signal and thereby en- hances the accuracy of the monitor.

5128539

APPARATUS HAVING REDUCED BACKGROUND FOR MEASURING

RADIATION ACTIVITY IN AEROSOL PARTICLES

John C Rodgers, Andrew McFarland, Carlos Oritz, William H Marlow assigned to The United States of America as represented by the United States Department of Energy

Apparatus having reduced background for measuring radiation activity in aerosol particles. A continuous air monitoring sampler is described for use in detecting the presence of alpha-emitting aerosol particles. An inlet frac- tionating screen has been demonstrated to remove about 95% of freshly formed radon pro- geny from the aerosol sample, and approx- imately 33% of partially aged progeny. Addition of an electrical condenser and a modified dichotomous virtual impactor are expected to produce considerable improvement in these numbers, the goal being to enrich the transuranic (TRU) fraction of the aerosols. This offers the possibility of improving the signal-to-noise ratio for the detected alpha-particle energy spectrum in the region of interest for detecting TRU