NOVELTY - The plant for gasification of biomass with continuous supply, subsequent mincing and gas cleaning, comprises a compression screw (3) for continuously supplying and condensing the biomass, a screw extruder (7), in which the biomass is continuously supplied under pressure, a combustion chamber (16) through which the biomass oxygen mixture premixed uniformly with one another is supplied, an extruder or an arrangement of extruders, through which the biomass is supplied to a gasification chamber, and a high temperature metallic membrane filter through which the gas is emerged at 900 degrees C.    USE - Plant for gasification of biomass with continuous supply, subsequent mincing and gas cleaning (claimed).    ADVANTAGE - The biomass gasification plant is simple and ensures economical and safe gasification of biomass with less cost by uniform temperature distribution and good mixing of gasification components.    DETAILED DESCRIPTION - The plant for gasification of biomass with continuous supply, subsequent mincing and gas cleaning, comprises a compression screw (3) for continuously supplying and condensing the biomass, which emerges a gas impermeable clot by which steam and gases not escape opposite to the conveying direction, a screw extruder (7), in which the biomass is continuously supplied under pressure by a defibration screw (8) and gradually heated by the supply of water steam and/or pure oxygen at 200-250 degrees C or the biomass is heated after the entrance of the screw extruder through the supply of water steam (11) and/or pure oxygen at 200-250 degrees C and subjected up to a pressure of 25-30 bar, a combustion chamber (16) through which the biomass oxygen mixture premixed uniformly with one another is supplied, so that it reaches to a homogeneous explosion (optimal partial combustion) at 900 degrees C, or the oxygen is alternatively supplied within the combustion chamber, an extruder or an arrangement of extruders, through which the biomass is supplied to a gasification chamber, a high temperature metallic membrane filter through which the gas is emerged at 900 degrees C and cleaned in several steps, a catalytic device, in which the gas is innoxiously made for the deduction of remaining pollutants, an arrangement, through which small quantity of water is injected before the supply of oxygen, so that a uniform inflammation of the explosion mixture is prevented before entering into the gasification chamber. Through the warming, the lignin contained in the biomass softens or is changed to fluid. The biomass (epidermis coat and nodes of grasses) is chemically disintegrated through the supply of oxygen. Through the screw element, the defibration screw produces shear force, which separates the biomass threads from one another and is finely minced the epidermis coat and nodes based on the embrittlement through the oxygen. The water steam is additionally supplied before the discharge of the screw extruder that leads large volume of fiber-steam mixture emerging through the extruder. The oxygen necessary for the gasification of the biomass is admitted at the discharge of the screw extruder. The high temperature filter for gas cleaning exists out of thin membrane, whose area has large openings up to 40% of 1-3 mu m. The high temperature filter consists of cylindrical membranes that are arranged concentric to each other and are lined with reticules through which a large surface emerges on narrowest area. The filter step is carried out as a redundant system in alternatively operated two off-line filters and the preset maximum pressure difference is reached in on-line filter. The gas stream is conducted to a second structurally identical filter. The previous on-line filter is detached through an inlet valve of the gas stream and the dropping of the filtrate is carried out by producing a pressure difference between the filter cake and the filter membrane. The filter step (Detail X) is carried out in only one filter in sufficiently fast production of the pressure difference ( Delta p). The number of valves reduces itself on an outlet valve for the filtrate discharge. The mounting and operation of the filter (Detail Y) are identical to the ash filter (Detail X). An artificial filter cake existing out of fine particles over a gas stream is subjected on the filter membrane. The artificial filter cake is made of dolomite, serves for neutralization of sour gases, splitting of tar gases and absorption of halogen compounds and is exchanged in saturation of the filter. The gas filtration step is carried out by the supply of sufficient quantities of naturally available or artificial alkaline for disposal. The filter step (Detail Z) is similarly like the filter steps (Detail X and Y). A layer of fine nickel particle of 20-50 mu size exists itself on the membrane and is subjected and then sintered by a gas as carrier unit. All remaining hydrocarbons, methane and yet available tar gases are transformed completely in carbon monoxide and hydrogen. The nickel catalyst has fine pore through which the gas flows. An intensive contact takes place between gas area and catalyst area. The nitrogen compound like ammonia and hydrogen cyanide is transformed in atmospheric nitrogen.    DESCRIPTION OF DRAWING(S) - The figure shows a principle sketch of a biomass gasification plant with hot gas cleaning.    Compression screw (3)    Screw extruder (7)    Defibration screw (8)    Steam (11)    Combustion chamber. (16)