Gas scrubber and method

A method of scrubbing and accelerating the draft of flue gases, comprising:

• leading flue gases through a flue from a source to a discharge end of the flue;
• diverting the flue gases from said discharge end of the flue into the top of a vertical passage extending a substantial length downwardly;
• producing a substantially uniform shower of gas-scrubbing at least predominately solid particulate material dispersed in the top of said passage in sufficient solid particulate material volume and individual solid particulate material particle mass to gravitate downwardly in the passage at accelerating speed and thereby effecting not only scrubbing contact of the solid particulate material with the flue gases but also causing a downdraft of the flue gases in the passage and thereby accelerating drawing of flue gases from said discharge end of the flue into said passage and improving flue draft;
• and at the lower end of said passage separating the scrubbed gases from the particulate material.