At present, annual domestic energy consumption in Japan, for example, amounts to the equivalent to about 400 million kl in heavy oil, most of which are however imported. In the meantime, thermal energy utilization in its industries accounts for 50% only, while the rest of the thermal energy remains unused to be discharged to the atmosphere. ZG waste heat boilers, or

utilize these unused heats effectively in such ways as steam generation, hot water supply, oil & air heating and further power generation, thereby contributing to energy and cost savings.

There is a more potential in a cement factory for electric power generation using waste heat recovery boiler compared to the other industries. A case study has been done at a cement factory having two units, 1600 TPD and 5500 TPD, identified three waste heat rejections at 176 °C, 330 °C and 420 °C and designed a suitable power plant configuration.

In this work, an attempt has been made to quantify the power generation capacity with plant analysis. It has been resulted that 12.5 MW of power can be produced with the available heat recovery against a cement factory demand of 15 MW. The available process heat for cement production and power generation has been estimated at a capacity range from 5000 to 9000 TPD. The analysis recommended a low steam pressure for power generation at above said heat recovery gas temperature.

ZG as a heat recovery boiler manufacturer in china with 70 years research history,can design waste heat recovery steam boiler and waste heat recovery hot water boiler can meet various appliacation.Between this two type boilers,generally,

and other industries,while hot water boiler usually used for heating company.

ZG fuel gas heat recovery involves the heat recovered through condensation of water vapor. Nearly all exhaust gases contain some moisture in the vapor form. As the exhaust stream cools, it eventually reaches its "dew point" and from then on water vapor begins to condense. In doing so, large amount of recoverable heat is released.

In fact, the heat required to convert water from liquid to vapor form is approximately five and a half times the heat required to bring water from just above the freezing point to its boiling point.

In a typical natural gas fired boiler, the flue gas contains roughly 12% of water vapor and at that concentration, the "dew point" is around 135F. The FLU-ACE tower cools the exhaust gases below the dew point temperature, forcing water vapor to condense and hence,waste heat recovers nearly all of the heat content.

Conventional economizers can cool exhaust gases to about 275F and recover only a small fraction of the total waste heat. In most cases the fuel gas heat recovery can recover five to six times more heat than typical indirect contact economizer.

The ability to recover ZG waste heat is one of the fuel gas heat recovery manufacturer with great strengths and advantages. With the high efficiency condensing heat recovery tower, the hot and humid exhaust gases cool well below their dew point temperatures, releasing not only the majority of the available heat, but also yielding significant amounts of reusable hot water.

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