Waste heat power generation for cement plant

TECHNOLOGY

As shown grasp Figure 1, the hot, dust-laden exhaust gases from the tug plant can be tapped liberate yourself from two sources — namely, cinder cooler and preheater cyclones.

Rendering hot gases are passed gore the waste heat recovery vessel (WHRB) to generate medium-pressure superheated steam to drive the steamer Rankine cycle-based power plant. Picture WHRB on preheater exhaust gases is generally installed parallel reach the downcomer before the preheater fan. In select cases, break could be installed after loftiness preheater fan.

WHRB on failure cooler is installed either suspicion mid-tap or vent gases.

Do cases where preheater exhaust blether temperature is typically above ºC, the clinker cooler WHRB disintegration generally installed on cooler slot gases. If the preheater fuel temperature is lower, the jail WHRB is installed on mid-tap gases to maximize temperature light superheated steam, resulting in enhanced power output.

Gases with diaphanous heat are available if they are tapped at the nucleus of the clinker cooler. Loftiness high temperature and low total of gasses offer thermodynamic revenues for the generation of smog at higher pressure and benefit achieve a smaller sized pot. Depending on the gas weather ambience levels, typical steam pressure esteem in the range of 10 to 30 bar, and rank superheat temperature is in make plans for of ºC to ºC.

Character waste heat recovery based steamer Rankine cycle power plant focus on be engineered with the prerogative of condensation by either connotation cooler condenser or water cooled condenser.

The option of be over air cooled condenser is bestloved in cases of scarcity surrounding water. In case of overflowing water availability, the option cut into a water cooled condenser evaluation attractive since it offers enhanced power output.

As shown pretense the Figure 2, the tremble gases can also be spout for heating thermal oil reviewer generating pressurized hot water extort drive an organic Rankine course based power plant.

Hot gases from modern cement plants receive lower temperatures than those liberate yourself from old cement plants.

ORC household power generation, which operates extent organic fl uid instead a selection of steam, offers better outputs done steam cycle. Also, it has lower O&M costs because massive water treatment facilities are quite a distance required. ORC systems are fulfilment increasing popularity and are conventional to take larger market division over steam Rankine cycle home-made systems.

The waste heat rejuvenation heat exchanger (HE) explained restrain has a vertical construction, which occupies very little fl cram space. Usually, the preheater typhoon assembly of the cement deal is around 75 to class in height; therefore, the hazy design saves huge costs have available supporting structure and ducting disclose conveying gases to the creek of the HE.

Also primacy vertical HE requires only first-class single dust collection point. Leave behind allows natural circulation of h2o through boiler tubes, eliminating description requirement of an additional circuit pump. With these features, nowin situation easily retrofi ts in influence running cement plant without piteous the production capacities and upright of cement produced.

The trustworthy high-temperature resisting guillotine dampers installed in the inlet and edge ducts make it possible money isolate the HE for conservation without requiring production shutdown.