Synthesis gas humidifier and heating and humidifying method

Abstract

The invention discloses a synthesis gas humidifier and a heating and humidifying method. The synthesis gas humidifier comprises a shell, a wind distributor, porous filler, atomizing nozzles, a demister and a liquid level measuring device; an exhaust pipe is arranged at the top of the shell; a water inlet pipe is arranged below the exhaust pipe in the shell; a horizontal annular pipe is arranged at the port of the water inlet pipe; the atomizing nozzles are uniformly distributed on the annular pipe; the demister is disposed between the water inlet pipe and the exhaust pipe; a drain pipe is arranged at the bottom of the shell; an air inlet pipe is arranged above the drain pipe; an annular wind distributor is horizontally arranged at the port of the air inlet pipe; and the porous filler is installed between the wind distributor and the atomizing nozzles. Air is uniformly and upwards fed fro the low-temperature synthesis gas fuel from the annular wind distributor of the air inlet pipe; high-temperature water is uniformly sprayed on the porous filler from top to bottom; the synthesis gas contacts with water on the surface of the porous filler for heating and humidification; and after the droplets going upwards with the gas flow are removed by the demister, the synthesis gas is sent out by the exhaust pipe. The invention is used for heating and humidifying the synthesis gas fuel of gas turbine and has advantages of compact structure, small capacity and flexible adjustment.

Description

technical field [0001] The invention relates to fuel technology, and relates to a syngas humidifier and a heating and humidifying method, which are used in a gas turbine syngas fuel supply system. Background technique [0002] Integrated gasification gas-steam combined cycle (IGCC) technology is an advanced power generation technology that realizes clean and efficient utilization of coal and reduces emissions. In modern gas turbine power generation technology, NOx is the main pollutant causing environmental pollution. For IGCC, the syngas produced by the gasification process is purified and used as fuel gas for the gas turbine, and the high combustion temperature in the combustion chamber will lead to the generation of a large amount of thermal NOx, polluting the environment, so measures must be taken to control system NOx emissions. [0003] Lowering the combustion temperature to reduce thermally generated NOx by injecting a diluent into the cleaned syngas fuel is a simple...

AI Technical Summary

Problems solved by technology

However, when the gas processing capacity is constant, the volume of the filler is limited by the liquid flooding velocity and the specific contact area. Only by increasing the volume of the filler can the processing capacity of the working fluid be increased, which increases the size of the entire device accordingly.

As mentioned earlier, this is detrimental to the variable operating conditions of the gas turbine as well as the system as a whole

There are also problems with the uniformity of water distribution or wetting performance of the filler. When the system load is small, the water flow into the humidifier decreases, which will cause the surface of the filler to not be completely wetted, thereby reducing the contact area between the gas and liquid, which is not conducive to transmission. Heat and mass transfer

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