54results about How to "Improved heat recovery" patented technology

The invention discloses a device for detecting trace sugar and a method thereof. The detecting device comprises a singlechip control module, a digital display module, a temperature detecting module and an electrical conductivity detecting module; the digital display module, and the temperature detecting module and the electrical conductivity detecting module are respectively connected with the singlechip control module. The detecting method comprises the following steps: (1) measuring the temperature and the electrical conductivity of condensed water with sugar; and (2) by using the condensedwater corresponding to the relevant sugar contained numerical relation under the condition of different temperatures and electrical conductivity, substituting the measured temperature and electrical conductivity in a formula to calculate and obtain the sugar content of water. The method can realize on-line measurement of trace sugar, improve precision and efficiency of detection, not only solve the safety problem of the reutilization of the condensed water formed by the evaporation of the prior cane juice and improve the utility ratio of the water and recovery heat energy, but also reduce thepollution of discharged condensed water and has good environmental protection effect.

The invention belongs to the field of urea preparation, and particularly relates to an energy-saving urea production system and a production process thereof. The system comprises a CO2 compressor, an ammonium carbamate pump, a liquid ammonia pump and a urea synthesizer. The system is characterized in that the CO2 compressor is connected with the ammonium carbamate pump and the liquid ammonia pump, the liquid ammonia pump is connected with the urea synthesizer, a falling-film countercurrent medium-pressure decomposing tower and a heater, an ammonium carbamate condenser, an ammonium carbamate separator, a three-stage medium-pressure absorption tower and an evaporative ammonia refrigeration recoverer, a liquid ammonia buffer tank, an inert gas scrubber, a tail-gas ammonia cleaning fine purifier, a low-pressure decomposing tower and a heater, a dimethyl liquid preheater, a horizontal low-pressure absorber, a falling film type pre-evaporator, a one-stage evaporator and a one-stage evaporative condenser, a two-stage evaporator and a two-stage evaporative condenser, and a process wastewater desorption and hydrolysis tower are sequentially connected behind the urea synthesizer in sequence. The energy-saving urea production system has the advantages of low investment, low energy consumption, simple operation, high elasticity and the like, thereby the process technology has considerable economic benefit and social benefit.

The invention relates to an evaporative heat exchanger for recovering heat dissipation from the surface of components and a household miniature cogeneration device. The evaporation heat exchanger is used to recover heat dissipation from the surface of components in the household micro cogeneration device. In the closed box of the household miniature cogeneration device, the evaporating heat exchanger includes an evaporating section and a condensing section, and the evaporating section has interconnected fluid channels, and the fluid channels are filled with absorbing components For the working fluid that dissipates heat on the surface, the condensation section is set on the return water pipeline of the domestic micro cogeneration device, and the evaporation section and the condensation section are connected through a working fluid exchange pipeline. Compared with the prior art, the evaporative heat exchanger of the present invention is used to recover the surface heat dissipation of the components in the household micro cogeneration device, which not only increases the heat recovery, but also avoids the attenuation of power generation capacity and the decline of energy efficiency caused by the intake air of the prime mover as the cooling medium The problem.

The invention relates to an ascending pipe waste heat insertion-type temperature control thermal expansion decoking heat pipe guiding-out method and device, and belongs to the technical field of coking furnace ascending pipe raw gas waste heat recycling. According to the technical scheme, a steam outlet pipe (13) and a water inlet pipe (14) are bent together to be of an L-type structure (1), the end of the horizontal segment of the L-type structure is provided with a detachable connector (22), the end of the perpendicular segment is provided with an anti-coking head (24), the steam outlet pipe is connected with a steam pocket (9), the water inlet pipe is connected with a water inlet system, raw gas and the water inlet pipe are isolated through the steam outlet pipe, the temperature of the exterior of the steam outlet pipe is not lower than the coking temperature, and meanwhile steam ascends gradually to heat inflowing water, so that the inflowing water is completely gasified. According to the ascending pipe waste heat insertion-type temperature control thermal expansion decoking heat pipe guiding-out method and device, the temperature is detected through a high-temperature thermocouple in the heat exchange process, the water yield of the inflowing water is controlled, and therefore coking of the exterior of the device is avoided; raw gas waste heat can be recycled, completely independent installation is achieved, the problems that a heat exchange device inside an ascending pipe is prone to coking, the ascending pipe is prone to explosion, installation is difficult, and the replacement and maintenance cost is high are solved, and the heat exchange amount is large.