Abstract: Combustion method and apparatus for NOx reduction are capable of easily achieving NOx reduction to an exhaust NOx value of 30 ppm or under. The combustion method is to perform in combination a first NOx reduction step for suppressing generated NOx value to 60 ppm or under (at 0% O2 in exhaust gas, dry basis) by a low NOx burner, a second NOx reduction step for recirculating exhaust gas of the low NOx burner to a burning reaction zone formed by the low NOx burner, and a third NOx reduction step for adding water or steam to the burning reaction zone.

Abstract: In a method for servicing and maintaining heat supply equipment, which includes making a servicing and maintenance contract to implement equipment performance maintenance, function maintenance, abnormality recovery and a diagnosis for preventive maintenance of the heat supply equipment, providing a communication network of the heat supply equipment, a first computer of a control station and a second computer of a control center communicatable thereamong via communication means, and implementing contents of the servicing and maintenance contract based on information obtained by communications in this network, the method includes receiving abnormality occurrence data, requesting and receiving detailed information, taking measures based on analysis results of these data and information, transferring the abnormality occurrence data, and obtaining and analyzing information for diagnosis.

Abstract: Combustion method and apparatus for NOx reduction are capable of easily achieving NOx reduction to an exhaust NOx value of 30 ppm or under. The combustion method is to perform in combination a first NOx reduction step for suppressing generated NOx value to 60 ppm or under (at 0% O2 in exhaust gas, dry basis) by a low NOx burner, a second NOx reduction step for recirculating exhaust gas of the low NOx burner to a burning reaction zone formed by the low NOx burner, and a third NOx reduction step for adding water or steam to the burning reaction zone.

Abstract: There is provided a system for servicing and maintaining heat supply equipment which ensures reliable analysis and high efficiency. Heat supply equipment 1 is composed of a control unit 5 to be attached to the heat supply equipment 1, and an equipment-side modem 6 for mediating the control unit 5 and a communication line 4. A management station 3 is composed of a management unit 7 for managing the heat supply equipment 1, and a station-side modem 8 for mediating the management unit 7 and the communication line 4. Upon reception of abnormality occurrence data sent from the control unit 5, the management unit 7 further receives detailed information data on an abnormality of the heat supply equipment 1 from the control unit 5, analyses by itself the received detailed information data, and creates recovery data for recovering the heat supply equipment 1 from the abnormality.

Abstract: In heat supply equipment provided with a plurality of maintenance object units, secure and prompt servicing and maintenance is implemented and a burden on a person in charge of managing the heat supply equipment is decreased.

Abstract: There is provided a system for servicing and maintaining heat supply equipment which ensures reliable analysis and high efficiency. Heat supply equipment 1 is composed of a control unit 5 to be attached to the heat supply equipment 1, and an equipment-side modem 6 for mediating the control unit 5 and a communication line 4. A management station 3 is composed of a management unit 7 for managing the heat supply equipment 1, and a station-side modem 8 for mediating the management unit 7 and the communication line 4. Upon reception of abnormality occurrence data sent from the control unit 5, the management unit 7 further receives detailed information data on an abnormality of the heat supply equipment 1 from the control unit 5, analyses by itself the received detailed information data, and creates recovery data for recovering the heat supply equipment 1 from the abnormality.

Abstract: In heat supply equipment provided with a plurality of maintenance object units, secure and prompt servicing and maintenance is implemented and a burden on a person in charge of managing the heat supply equipment is decreased.

Abstract: A harness indicator is highly reactive to a trace amount of Ca2+, and is slow to degrade in a high temperature environment of greater than 50° C. In one embodiment, the hardness indicator contains EBT, a pH buffer, and a masking agent as main components, and an admixture of Mg-EDTA. In another embodiment, the hardness indicator contains EBT, a pH buffer, and a masking agent as main components, and an admixture of anhydrous Mg-EDTA. In another embodiment, the hardness indicator contains EBT, a pH buffer, and a masking agent as main components, and an admixture of anhydrous Mg-EDTA and potassium sorbate. In a further embodiment, the hardness indicator contains EBT, a pH buffer, and a masking agent as main components, and an admixture of Mg-EDTA and potassium sorbate. In a further embodiment, the hardness indicator contains EBT, a pH buffer, and a masking agent as main components, and an admixture of potassium sorbate.

Abstract: A liquid feeding apparatus quantitatively feeds a liquid by pressing and clogging an elastic tube between a press roller and an arc-shaped guide portion through rotational motion of the press roller. The liquid feeding apparatus includes a main unit in which the press roller is provided, and a liquid cassette which accommodates a liquid cartridge. One end of the elastic tube is connected to a reservoir for the liquid to be fed, and the other end is connected to a check valve. The liquid cassette is removably fitted to the liquid feeding apparatus so that the elastic tube is subject to pressing action of the press roller.

Abstract: The membrane deaerator according to the present invention includes a plurality of membrane deaerator modules and a water sealed vacuum pump connected thereto. These modules are series-connected between a raw water supply line and a deaeration water supply line. A first vacuum pump is connected to a first deaerator module via a deaeration line, and a second vacuum pump is connected to a second deaerator module via the deaeration line. These vacuum pumps are each provided with a seal water supply line which is used to send the raw water introduced from the water supply line thereinto as seal water to each of the first and second vacuum pumps. A discharge line for the second vacuum pump is connected to the deaeration line for the first vacuum pump. In the membrane deaerator thus formed, the deaeration performance is improved greatly, and a deaeration with dissolved oxygen concentration of several PPB can be carried out.