Abstract: A method and apparatus for the treatment of a waste gas containing dust and chemical contaminants are disclosed. The apparatus includes a combination of a cooling/dust-eliminating chamber and a chemical treatment chamber in a single container. The first mentioned chamber is provided with sprayers for the cooling liquid, a perpendicular bulkhead or pipes, a collecting plate for the cooling liquid and gas-dispersing pipes in a special configuration, so that the dust-liquid separation can be efficiently effected without badly affecting the chemical treatment of the gas. Thus, the apparatus can be minimized in size as a whole and made economically attractive.

Abstract: A method and apparatus for the treatment of a waste gas containing dust and chemical contaminants are disclosed. The apparatus includes a combination of a cooling/dust-eliminating chamber and a chemical treatment chamber in a single container. The first mentioned chamber is provided with sprayers for the cooling liquid, a perpendicular bulkhead or pipes, a collecting plate for the cooling liquid and gas-dispersing pipes in a special configuration, so that the dust-liquid separation can be efficiently effected without badly affecting the chemical treatment of the gas. Thus, the apparatus can be minimized in size as a whole and made economically attractive.

Abstract: A process for the production of a coal-water mixture, which comprises dry-pulverizing coal under supply of hot air to form pulverized coal in which the proportion of particles having a particle size smaller than 200 .mu.m is at least 90%, in which the proportion of particles having a particle size smaller than 10 .mu.m is 10 to 60%, and making the pulverized coal and the hot air sucked in a mixed-air water jet stream.

Abstract: An improved compact apparatus for gas-liquid contact and separation by precipitation of solids therein, which essentially comprises a splash separating section, a solid-gas-liquid contact section and a solid depositing section formed in a single reaction vessel, in which gas is blown into the vessel through a gas disperser having a gas outlet opened below the liquid surface in said solid-gas-liquid contact section and caused to undergo contact with the phase of a suspension forcibly circulated from said solid depositing section formed below said solid-gas-liquid contact section, whereby the precipitated solids are prevented from depositing the inner surface of the vessel and other attendant members.

Abstract: A gas-liquid contacting apparatus for removing sulfur dioxide from a flue gas is provided which comprises a vessel for receiving therein a liquid aqueous absorbent in a continuous phase; gas sparger means having an opening means at one end thereof, the gas sparger means extending vertically from above the surface of the aqueous absorbent liquid and through the surface such that the opening means is positioned below the surface wherein the opening means comprises notch means formed in the side walls of the gas sparger means and an open end of the gas sparger means; air sparger means in the aqueous absorbent, below the gas sparger means; outlet means for the gas after it contacts the aqueous absorbent, the outlet means being located above the level of the aqueous absorbent; reactant inlet means into the vessel; aqueous absorbent inlet means into the vessel; and outlet means for the reaction products and spent aqueous absorbent.

Abstract: A method for removing sulfur dioxide from flue gases by simultaneous absorption and oxidation in an aqueous absorbent. An enclosed body of an aqueous liquid absorbent for the sulfur dioxide is provided and the flue gas is sparged into an upper portion of the liquid absorbent to form a first zone thereof. An oxygen-containing gas is introduced into a lower portion of the liquid absorbent to form a second zone of the liquid absorbent that is below the first zone of the liquid absorbent and which has an apparent density that is higher than that of the first zone. The oxygen-containing absorbent from the second zone is circulated to the first zone near the point of the flue gas introduction and an alkaline material reactive with the sulfur dioxide in the liquid absorbent is introduced into the body of liquid absorbent thereby fixing the sulfur dioxide in the liquid absorbent in the form of a sulfate. The sulfate is subsequently removed from the body of aqueous liquid absorbent.

Abstract: A single-vessel apparatus for desulfurization of flue-gas containing gaseous sulfurous acid, in which the flue gas is contacted with an absorption liquid to thereby have the sulfurous acid content in the flue gas absorbed by said absorption liquid and, at the same time, oxidized by an oxygen-containing gas and further fixed, comprising: a gas dispersing plate member; a weir member; said gas dispersing plate member and said weir member forming in the single vessel first and second zones, the first one being a zone in which the flue gas is contacted with and absorbed by the absorption liquid, the second one being a reservoir of the absorption liquid; a flue gas introduction portion for feeding flue gas from below said gas-dispersing plate member to said first zone; a pipe through which to feed a sulfurous acid gas-fixing agent into the vessel; a pipe for discharging the absorption liquid; a treated gas-discharging outlet; a liquid-raising pipe disposed between a lower portion of said second zone and the flue ga