Apparatus for injecting dry solid particles into a liquid including noise muffling means

Claim 1

In an injection apparatus for use in injecting dry solid particles into a liquid the combination comprising: first means including a nozzle and having an outlet for directing a fluid containing entrained dry solid particles toward a liquid, and for greatly reducing the velocity of the fluid without appreciably reducing the velocity of the particles, and muffling means comprising a cup-shaped member having a first plate secured to the discharge end of said nozzle with an opening in said first plate in register with said discharge end, said first plate having a peripheral depending baffle, and a buoyancy chamber secured to said first plate and comprising inner and outer walls closed at one end by an end plate and open at the other end for receiving said depending baffle in spaced relation to said inner and outer walls and said end plate, whereby said inner and outer walls, said end plate, and said baffle cooperate to provide a tortuous path for said exhaust fluid for muffling noises produced thereby, and said closed end of said buoyancy chamber is partially immersed in the liquid for muffling the noise generated by the fluid and by the high velocity particles striking and entering the liquid.