R. I. 4971 - Progress Report on Operation of Pressure-Gasification Pilot Plant Utilizing Pulverized Coal and Oxygen

				Page
Section 1 504kb	Summary and conclusions			1
	Introduction			2
	Acknowledgments			2
	Theoretical and economic considerations that make high-pressure gasification attractive			2
	Description of pilot plant			3
Section 2 476kb		Reactant nozzle development		5
		Steam-oxygen superheater		6
		Coal preheater		6
		Safety and control system		6
		Coal-feeding equipment		8
	Operating procedure			9
		Coal preparation and nature of residues obtained		12
Section 3 433kb	Discussion of operating experience with individual equipment items and implications as to future development			13
		Coal-feeding equipment		13
			Recycle compressors	13
			Coal preheater	13
			Flow control	13
		Steam-oxygen superheaters		14
			Original steam heater	14
			Present steam-oxygen superheater	14
			Oxygen-steam flow regulation	14
		Gasifier		14
			Refractory linings	15
			Cooling coils	15
			Preheating method	15
			Cross-over line	16
			Waste-heat recovery	16
			Slag collection	16
		Scrubber		16
			Water-letdown valve	16
			Packing	17
			Gas-letdown valve	17
	Results			17
		Principal calculated results		17
		Coal and residue data		19
	Accuracy of results			22
		Probable accuracy of measurements		22
			Oxygen flow	22
			Steam flow	22
Section 4 393kb			Coal flow	23
			Product-gas flow	23
			Residue measurement	23
			Other measurements	24
		Comparison of product-gas flow data and residue data		24
	Discussion of results			25
		Effect of oxygen-coal ratio		25
		Relationship between pressure and capacity		26
		Probable capacity at higher pressure		27
		Heat losses and probable economic effect in larger units		27
		Nature of sulfur content of product gas		27