SE502142C2 - Generator for generating gas in gas generator - Google Patents

Abstract

The invention relates to a gas generation portion for generating gas from solid fuels. In order to provide the best possible gasification process with regard to the nature of the fuel used at the time, the generation portion is adjustable and controllable within a wide range by the area of the gas take (1) as well as the distance between the primary air nozzle (9) and the gas take (1) being adjustable. To reduce fuel consumption, waste heat and exhaust gases are recovered and utilized in the gasification process.

Description

-x UI 50 55 å_502 142 '_- is exposed to a solid fuel 6 through the opening 2 on cylinder 1, which agree in terms of surface and shape. The grid image of the grid surface, i.e. hole diameter and distance from the hole center to the hole center are structurally critical to achieve both qualitative and quantitative correct gas generation. Cylinder 3 can be equipped with several different grid surfaces, which make it possible to achieve the best gasification process for the solid fuel at the moment by rotating the shaft 4.

Primary air comes primarily from an ambient air and secondarily through a radiator water heat exchanger 7 heated by an internal combustion engine, which is in constant use for the primary air needed for the gas generator, its temperature is regulated by the internal combustion engine radiator water thermostat, tertiary by a heat exchanger. A primary air nozzle 9 is placed between two holders with longitudinal recesses, which can be designed straight or in an arc.

The primary air nozzle consists of a pipe whose ends are closed. A longitudinal slot aims to be able to spread maximum air over the grid surface. At both ends are placed axes whose task is to be able to run along the shape of the recesses. The primary air nozzle is fed to the primary air nozzle via a primary air duct 10. The entire primary air unit can be actuated by a lifting device 11, so that the primary air nozzle can be adjusted closer and farther from the opening 2 and the grid surface 5. By actuating a damper 12, exhaust gas is regulated -temperature air heat exchanger 8 temperature. With heated primary air, a significant excess heat is obtained, which in turn results in an increased reduction temperature. In order not to cause this elevated temperature to cause incipient destruction of the materials exposed to oxidation and reduction, a certain amount of the combustion engine exhaust gases 15 are returned, which consist of carbon dioxide, which when it comes into contact with glowing coals undergoes an endothermic reduction to carbon monoxide. The exhaust gases are captured by a "catcher" inserted in the exhaust line. This traps the exhaust gases, which come under overpressure and are led in a line to an ejector nozzle 15 located at the bottom of a cyclone cleaner 14. This ejector is adapted so that a certain overpressure or underpressure occurs, so that the exhaust stream is able to return - carry the carbon particles that continuously end up at the bottom of the cyclone cleaner. Returning exhaust gases and carbon particles are introduced into the gasification process via a line 16 to the primary air duct and to the primary air nozzle. The returning amount of exhaust gas causes a reduction in the temperature. This is raised again by the action of the damper 12, which primarily gives an increased exhaust gas-primary air heat exchanger temperature, secondarily a: 1O-satisfied reduction temperature. Once again, it is reduced by the return of more exhaust gases. Due to the increased demand for exhaust gas return, it is required that the ejector nozzle 15 is made variable, so that it can let more exhaust gases but still maintain the purification process by picking up carbon particles from the bottom of the cyclone cleaner and / or that exhaust gases are returned directly with impact of a damper 17 via a line 18 to the primary air duct 1%.

Thus, a point is found where the reduction temperature can no longer be maintained by means of the exhaust gas-primary air heat exchanger with the consequence that the calorific value of the gas decreases with a concomitant reduction in power on the engine. Instead of or with exhaust gas recirculation, water, water vapor or superheated steam may serve as a reduction temperature regulator. Water is injected before the primary air enters the exhaust-primary air heat exchanger for steam generation. Its dosing is controlled by a device 19 which pumps or by means of negative pressure it is obtained that water is let in before the exhaust-primary air heat exchanger through line 20.

If only water is to be supplied, this is dosed by means of the device 19 but now via a line 21 to a point after the exhaust primary air heat exchanger. The water can also be preheated by allowing the water to undergo an electric heater.

Claims (6)

1C 20 25 50 55 so2 142 1 4 PATENT REQUIREMENTS A gas generator for generating gas from solid fuels, comprising a primary air nozzle for supplying primary air and a gas outlet for discharging generated gas, characterized in that a. The gas outlet consists of a fixed cylinder at one end and has a pipeline for connected to the other end and has an opening * ~ of the jacket surface, a second rotatable cylinder (E) the fixed cylinder (1) and that b. a primary air duct (10) is connected to the primary air nozzle (9) , the distance of which to the fixed cylinder is adjustable. Gas generator according to Claim 1, characterized in that the primary air nozzle (9) consists of a tube with closed ends, which has a longitudinal recess for primary air distribution and the fixed air duct (10) connected thereto. ear-bound primary A gas generator according to claim 1, characterized in that exhaust gases from combustion of the generated gas are returned to the primary air via a damper (17). Gas generator according to claim 1, characterized by an exchanger (8) for heating the primary air. Gas generator according to Claim 4, characterized by a radiator water heat exchanger and / or an exhaust heat exchanger, in that the temperature of the exhaust heat exchanger (8) is regulated by means of a damper (12). A gas generator according to claim 1, characterized in that a controlled amount of exhaust gases is returned to the primary air by means of an ejector (15) located at the bottom of a cyclone cleaner (14) connected to the gas outlet. A gas generator according to claim 1, characterized in that it is loaded with fuel from a fuel magazine connected to the gas generator through a pipeline.