Abstract:
PURPOSE: A coal gasifier using downer region in circulating fluidized bed reactor is provided to increase selectivity of generated gas through the separation of a combustion region and a gasification region, thereby increasing conversion efficiency of coal. CONSTITUTION: The coal gasifier comprises an ascending pipe(21) for causing a combustion reaction of coal, primary and secondary cyclones(22) connected to an upper end of the ascending pipe for collecting solid particles, a flow supply device(23) connected to a lower end of the cyclone for enabling uniform injection of the solid particles, a descending pipe(24) extending downward from the flow supply device for causing gasification of coal, a gas/solid separator(25) connected to a lower end of the descending pipe, and a solid recirculating portion(26).
Abstract:
PURPOSE: A thermogravimetric analyzer is provided to precisely measure variation of size and weight of solid particles by using a heating tube and a porous sample basket. CONSTITUTION: A thermogravimetric analyzer includes a preheating tube(10), a heating tube(17), a porous sample basket(15), and an electronic balance(21). The preheating tube(10) is installed between a reaction gas vessel(34) and the heating tube(17) so as to preheat reaction gas before reaction gas is fed into the heating tube(17). A flowmeter(32) is provided to adjust a flow rate of reaction gas injected into the heating tube(17) through a reaction gas injection part(26). The heating tube(17) is fixed by means of a flange(11) and includes a temperature measuring section(12) and an electric heating wire(14). The temperature of the heating tube(17) is controlled by means of a temperature controller(13).
Abstract:
본 발명은 하단 천공된 드래프트관을 갖는 내부순환유동층 가스화 반응기에 관한 것이다. 좀 더 구체적으로, 본 발명은 구멍이 하단에 형성된 드래프트관을 반응기체 주입분산판과 밀착설치하여 높은 발열량의 가스를 생성하며, 동시에 경사진 수증기 주입분산판을 반응기 하단에 설치하여 애뉼러스 부분의 고체입자 움직임을 원활케 하는 내부순환유동층 가스화 반응기에 관한 것이다. 본 발명의 가스화기를 사용하면, 유동층 입자의 순환특성을 유지하면서, 높은 발열량의 가스를 생성할 수 있다.
Abstract:
A medium circulating combustion furnace using a circulation layer of a dual path is provided to sufficiently secure reaction of medium particles by increasing the stay time of the medium particles in an air reactor. A medium circulating combustion furnace using a circulation layer of a dual path includes a bubble flow layer air reactor(22), a bubble flow layer reduction reactor(21), two medium circulating ascent pipes(23), a non-mechanical valve(24), and a cyclone(25). The bubble flow layer air reactor provides a heat radiating reaction region for oxidizing a metal. The bubble flow layer reduction reactor provides a heat absorbing reaction region for reducing a metal oxidation material. Solid particles are circulated between the two bubble flow layers and are moved to another reaction region.
Abstract:
PURPOSE: To maximize UV irradiation efficiency on reactive gas and photocatalyst, by substituting quartz tube for conventional borosilicate tube of photocatalytic reactor as well as locating UV lamp outside of ascending tube, thereby improving photocatalytic decomposition efficiency of trichloroethylene. CONSTITUTION: The reactor comprising an ascending pipe(21) consisting of quartz tube and filled up with photocatalyst, a porous dispersion plate(23) equipped at the lower end part of the ascending tube, a reaction gas injection part(28) equipped at the terminal end of the porous dispersion plate, a cyclone(26) connected to the upper end portion of the ascending pipe, a descending pipe(25) equipped at the lower end part of the cyclone, a loop-seal shaped recirculating equipment connected to the porous dispersion plate and equipped at the end of the descending tube, a reaction gas discharge part(27) equipped at the upper end part of the cyclone and ascending tube and an ultraviolet rays lamp(22) equipped at the outer part of the ascending tube. The method comprises steps of (a) filling up the ascending tube of the reactor with the photocatalyst; (b) putting VOCs gas into the reaction gas injection part; and (c) applying the ultraviolet rays to the ascending tube.
Abstract:
PURPOSE: A two-dimensional fluidized-bed photocatalytic reactor is provided which has an annulus shaped narrow gap, and a method is provided which photodecomposes nitrogen oxide (NO) using the improved two-dimensional fluidized-bed photocatalytic reactor. CONSTITUTION: The two-dimensional fluidized-bed photocatalytic reactor comprises an annulus part (28) consisting of two quartz tubes each of which have different diameters; a porous dispersion plate (21) supporting photocatalysts (24) at the lower part of the annulus part; a reactive gas infusion part (25) installed under the porous dispersion plate; a reactive gas discharging part (27) installed at the upper part of the annulus part; and an ultraviolet ray lamp (23) installed inside the quartz tube having a smaller diameter out of the quartz tubes (22), wherein the photocatalysts (24) are one or more catalysts selected from the group consisting of TiO2, SnO2, ZnO, WO3, Fe2O3, CdS, MoS2, CdSe and MoSe2 which are coated on silica gel. The method for photodecomposable nitrogen oxide (NO) comprises the steps of filling photocatalysts into the annulus part of the two-dimensional fluidized-bed photocatalytic reactor; infusing nitrogen oxide (NO) into a reactive gas infusion part; and irradiating ultraviolet rays.