51results about How to "Save gas cost" patented technology

A gas divided flow supplying apparatus, including a control valve 3, a pressure type flow control unit 1a connected to a process gas inlet 11, a gas supply main pipe 8 connected to the downstream side of control valve 3, a plurality of branched pipe passages 9a, 9n connected in parallel to the downstream side of main pipe 8, opening and closing valves 10a, 10n interposed in the respective branched pipe passages 9a, 9n, orifices 6a, 6n provided on the downstream sides of valves 10a, 10n, a temperature sensor 4 provided near the process gas passage between the control valve 3 and the orifices 6a, 6n, a pressure sensor 5 provided in the process gas passage between the control valve 3 and the orifices 6a, 6n, divided gas flow outlets 11a, 11n provided on the outlet sides of the orifices 6a, 6n, and an arithmetic and control unit 7.

A material mixture for producing a fireproof material, including spinel and zirconium oxide and a coarse-grained fraction with a weight fraction of greater than 50% and a fine-grained fraction, wherein the coarse-grained fraction includes coarse grains with dimensions larger than 20 μm and the fine-grained fraction includes fine grains with dimensions smaller than 20 μm.

The invention discloses a device and method for preparing multi-bottle mixed gas, belonging to the field of mixed gas distribution. The device includes dilution gas raw material gas cylinders, component gas raw material gas cylinders, weighing devices, pressure reducing valves, first ball valves, second ball valves, high vacuum baffle valves, vacuum pressure gauges, vacuum pumps, venting control valves, exhaust Empty pipelines, raw material gas main pipelines, precision pressure gauges, product gas manifolds, needle valves, and product gas cylinders; the product gas manifold contains multiple gas pipelines, and the number of needle valves and product gas cylinders is the same as the number of gas pipelines. The quantity is equal. The steps of the method are as follows: Step 1, pipeline connection; Step 2, pipeline evacuation; Step 3, pipeline gas replacement; Step 4, mixed gas preparation; Step 5, pipeline evacuation. The low-concentration gas is prepared by using the device and method of the invention, which reduces the weighing error, improves the gas distribution accuracy, has fast gas distribution speed, is suitable for mass production, and saves the gas distribution cost. And the device is simple, and the method is easy to operate.

A gas detection apparatus A comprises a signal processing circuit 20, a Wheatstone bridge circuit 21, integrating circuits 22 and 23, a differential amplification circuit 24, a direct current power supply circuit 25, a heater voltage application circuit 26. The Wheatstone bridge circuit 21 is configured of parallel combination of series circuits: one composed of a catalytic combustion type gas sensor 1 and a load resistor R1, and the other composed of a resistor R2, a variable resistor VR1 and a resistor R3. The heater voltage application circuit 26 is configured to generate a pulsed heater voltage by switching a direct current voltage of the direct current power supply circuit 25 through a transistor TR1 for applying the pulsed heater voltage to the Wheatstone bridge circuit 21. The integrating circuit 22 integrates a voltage at a connection point between the gas sensor 1 and the load resistor R1. The integrating circuit 23 integrates a voltage at a connection point between the variable resistor VR1 and the resistor R3. The differential amplification circuit 24 is configured to amplify a differential voltage between the output voltages of the integrating circuits 22 and 23. The signal processing circuit 20 is configured to determine a concentration of a flammable gas from an output voltage of the differential amplification circuit 24.

The invention provides a controllable discharge ablation method for a combustible difficult-to-process material and with adjustable combustion-supporting gas concentration. The method is characterizedin that a mixed gas medium provided by a special combustion-supporting gas concentration adjustable gas supply device is introduced before processing; during processing, inter-pole voltage required to breakdown the mixed gas medium is supplied to two poles through a pulse power supply, and required energy is provided for melting and gasification of an inter-pole workpiece material; after a metalmaterial forms a high-temperature molten material, the high-temperature molten material and combustion-supporting gas in the mixed gas medium are subjected to a severe oxidation chemical reaction, a large amount of chemical energy is generated, extra ablation energy is introduced for efficient material ablation, and therefore the material removal rate of the combustible difficult-to-process material is improved under the condition that the discharge energy of the pulse power supply is certain. By means of the special gas supply device, the concentration of the combustion-supporting gas participating in the oxidation reaction is controlled, the explosion phenomenon caused by violent combustion in the processing process is avoided, the damage of a machined workpiece is avoided, and controllable and efficient processing of the combustible difficult-to-process material is achieved.

A gas appliance includes a burner, a gas valve, and a control device, wherein the gas valve includes a valve body, a flow regulator, a hot film anemometer, and a stepper motor. The valve body communicates with the burner and a gas source. The flow regulator is driven by the stepper motor to change a gas flow rate supplying to the burner. The hot film anemometer is disposed in the valve body and includes a probe exposed to the outlet passage. The control device executes a control method for the gas valve: sensing the gas flow rate in the outlet passage with the hot film anemometer; comparing the gas flow rate sensed by the hot film anemometer with a predetermined gas flow rate, and controlling the stepper motor to drive the flow regulator based on the comparison result, whereby to stabilize the gas flow rate.

The invention discloses an ignition control method for a gas water heater and a wall-hanging stove with adaptive flue pressure change. The ignition control method for the water heater and the wall-hanging stove with the adaptive flue pressure change includes the following steps that S1, when the gas water heater or the wall-hanging stove is on standby, a hot water tap is turned on, a fan is started, and an actual fan rotation speed is obtained; S2, a size relation between the actual fan rotation speed and a theoretical fan rotation speed is judged, and the theoretical fan rotation speed is a fan rotation speed when external pressure of the flue of the gas water heater or the wall-hanging stove is equal to internal pressure of the flue, the actual fan rotation speed is the fan rotation speed when the external pressure of the flue of the gas water heater or the wall-hanging stove is not equal to the internal pressure of the flue; and S3, the fan rotation speed and ignition logic of the gas water heater or the wall-hanging stove are adjusted according to the judgment result of S2, so that the gas water heater or the wall-hanging stove can be ignited and operated normally; and the rotation speed of the fan can be compensated quickly according to blockage of the flue or the external wind pressure and a high and reliable ignition success rate is realized.