Provided is an apparatus for removing smoke and poisonous gas. The apparatus includes a body configured to include a flux unit which supplies water and a nozzle which is connected to the flux unit and has a narrower width than the flux unit, a frame configured to surround the body and include a suction part for removing smoke, and a heat sensitive unit fixed to seal the nozzle. When the flux unit, nozzle and frame sprays fluid with a certain pressure at high speed through the nozzle, pressure energy of the fluid is changed to velocity energy, and a vacuum state is formed in a suction room at a low pressure due to a fast speed. In order for an operation to be performed as a vacuum ejector for sucking another fluid, the suction part is positioned surrounding the nozzle, and the frame is provided to surround the heat sensitive unit. A negative pressure explained in Bernoulli's theorem is generated to form a vacuum in the space between the nozzle and the mixing chamber, thus enabling the suction of smoke and poisonous gas. The smoke and poisonous gas are mixed with water in the mixing chamber so as to be trapped in the water or dissolved and dispersed in the water. The suction part is formed in the area which encloses the nozzle such that the suction part can operate together with a vacuum ejector. The frame is arranged so as to enclose the heat sensitive unit.

A dissolution device comprising a tubular body comprising an inlet, an outlet and a side duct, said tubular body further comprising a first chamber fluidly connected to the side duct, and a second chamber fluidly connected to said first chamber through a chamber junction conduit; and a central body comprising an inlet portion and an outlet portion, said central body being located within the tubular body and attached to said tubular body; wherein the tubular body and the central body define a passage therebetween through which fluid can flow, wherein the first chamber is further fluidly connected to the passage through a first inner conduit and to an exterior of the tubular body through the side duct, and the second chamber is fluidly connected to the passage through a second inner conduit, and wherein the dissolution device comprises two gas dissolution zones. A dissolution system comprising said the dissolution device and a stabilizer tank fluidly connected to the dissolution device.

The mixing nozzle has a throat section, a diffuser section, a gas nozzle section, a first liquid suction port, a liquid nozzle section, a second liquid suction port, a baffle plate, and a jetting port. The first liquid suction port liquidly absorbs the solution in the water storage pool from a side of the gas nozzle section toward the gas nozzle tip. The liquid nozzle section extends to the downstream side of the gas nozzle section with intervening the first liquid suction port. The second liquid suction port liquidly absorbs the solution in the water storage pool from a side of the liquid nozzle section toward the liquid nozzle tip. The baffle plate is provided such that the mixed flow mixed in the diffuser section collides in front of a downstream end of the diffuser section, and divides and reverses the mixed flow.

Disclosed is a system that uses multiple Venturi injectors in series. These Venturi injectors may inject a fluid, such as a gas or a liquid, into the liquid stream passing through the Venturi injectors. The system may include two or more Venturi injectors with an inlet port that receives an inlet liquid stream, a suction port that may passively receive a fluid, such as a gas, and an outlet port that ejects the mixture of liquid and fluid. The Venturi injectors are positioned in series along a liquid conduit, where each downstream Venturi injector is successively larger than the immediately preceding Venturi injector.