SU1315723A1 - Combustion apparatus - Google Patents

Abstract

The invention relates to the combustion of fuel (t) and m, b, used in thermal power plants. The invention allows to increase the efficiency and. reliability of the furnace. The gas intake port 4 is located in the lower part of the chamber (K) 3 afterburning over the upper slope 6 overpressure 5. After the last unburned particles T enter K 3 where the burnout T ends and the gases are cooled. Due to the suction of flue gases through the window 4, unburned particles through the recirculation pipeline 8 enter the K 1 combustion, which contributes to a deeper burning out of T. The suction of gases through the window 4 allows the flow structure to be organized in K 3, as a result the entire cross section of K 3, This in turn leads to an increase in the average residence time of flue gases in the short circuit, 1 Il. S (L coed ND 00

Description

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This invention relates to fuel combustion and can be used in thermal power plants.

The purpose of the invention is to increase efficiency and reliability.

The drawing shows the furnace, a longitudinal section.

The firebox contains a shielded vortex combustion chamber 1 with pulverized burners 2 and after-burning chamber 3 with a gas intake window 4, interconnected by means of a clamp 5 formed by the upper 6 and lower 7 slopes. The gas intake port A is located in the lower part of the chamber 3 afterburning over the upper chute 6 of the clamp 4 and connected to the burners 2 by the gas pipeline 8 of recirculation equipped with a threaded device 9.

The furnace works as follows.

Fuel and air are fed through the burner 2 into the volume of chamber 1, where most of the fuel particles are burned, circulating in a vortex flare. The flue gas stream containing volatile ash and unburned fuel particles then passes through pinch 5 into the afterburning chamber 3, in which the fuel burns out and the gases are cooled to the temperature required by the process technology by transferring heat from the flame to the screen. Due to the suction of flue gases through the window A, unburned particles contained in these gases, via the recycling gas pipeline 8, enter the combustion chamber 1, which ensures an increased circulation ratio of combustible material and, consequently, contributes to a deeper ignition of the fuel.

Editor M. Blanan

Compiled by V. Kruglovsky

Tehred A. Kravchuk Proofreader S. Shekmar

Order 2337/38 Circulation 494 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

o

57232

The suction of gases through the window 4, located above the upper slope 6 of the clamp 5, allows you to organize a continuous flow structure in the afterburner 3 5, resulting in a flow

The flue gases turn out to be fairly evenly distributed (at speeds) over the entire section of chamber 3. This leads to an increase in the average residence time of the flue gases in the afterburning chamber, which improves the efficiency of the combustion process as a whole by reducing the final mechanical underburn of fuel. Due to the gas suction through the window 4, a more uniform dynamic and thermal effect of the torch on the front walls of the afterburning chamber 3 is achieved, which increases the reliability of the screens and, therefore, the furnace as a whole. Placing the gas intake window 4 in the zone of moderate torch temperatures also increases the reliability of the furnace by reducing the likelihood of slagging of the window.

Claims (1)

Invention Formula five 0 five A firebox containing a vortex combustion chamber with pulverized coal burners and afterburners connected to each other by means of a pinch formed by the upper and lower slopes, as well as a gas intake window connected by a gas pipeline equipped with a traction device, with a combustion chamber characterized in that increase in economy and reliability, gas intake The window is located in the lower part of the afterburning chamber above the upper chute.