SU1513300A1 - Waste heat boiler - Google Patents

Abstract

The invention relates to waste heat boilers and allows for increased heat transfer. The duct is divided by a longitudinal partition 2 into the firebox (T) 5 and convective chamber (K) 6. In the lower part T 5 and K 6 are communicated through window 7, which is installed by distributing the pipes of the partition 2 into the festoon. Combustion products (PS) generated during the combustion of fuel in the burner 4 move towards the window 7, where they meet with the flow of exhaust gases moving through the gas duct. Feston inhibits the flow of PS from T 5, which causes an increase in statistical pressure in the latter. The PS flow then takes on a self-oscillatory character, which increases the completeness of the combustion of fuel. 2 Il.

Description

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The invention relates to energy and can be used to recover the heat of the waste gases of various process plants.

The purpose of the invention is to intensify heat transfer.

FIG. G depicts a waste heat boiler, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The waste-heat boiler contains a flue with a ceiling 1, divided by a longitudinal partition 2, made of pipes 3 of heating surfaces, on a furnace 5 equipped with a burner 4 and a convective chamber 6 connected through a gas passage 7 located at the bottom of the furnace 5 and formed by the wiring into the festoon bent to the side of the furnace 5 pipes 3 partitions 2. The partition 2 adjoins the ceiling 1, on which the burner 4 is installed. Bent to the side of the furnace 5 pipes 3 form under the furnaces 5 and divorced into a festooned with a staggered arrangement.

The waste heat boiler works as follows.

Fuel (gaseous or liquid) from the burner 4 enters the furnace 5, where it is burned. The products of combustion of fuel in the lower part of the firebox 5 brake vehicle. The barrier is in the form of a festoon formed by vodka of pipes 3 arranged in a checkerboard pattern. The braking process is enhanced by suppressing the oncoming flow of flue gases from the flue duct to the furnace 5 through the window 7. Owing to the sudden braking, an abrupt increase in the static pressure in the furnace 5 occurs. -. adds and adopts auto-oscillator

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pulsation character, resulting in an increase in the completeness of fuel burnout.

Passing through the festoon from the pipes 3 of the heating surfaces and transferring some of the heat to them, the combustion products are mixed with the waste gas stream and enter the convection chamber 6, where heat is transferred to the convective heating surfaces.

A change in the mode of operation of a technological installation is compensated by increasing or decreasing the amount of fuel burned, whereby the waste-heat boiler produces a heat carrier of constant parameters.

The result of the firing of the furnace 5 in the form of an inclined festoon from pipes of heating surfaces installed in a staggered manner and the supply of a counter flow of flue gases under the festoon results in an increase in the fuel burnup in the waste heat boiler and uniform mixing of the combustion hot gas installations. The result of this is an increase in the efficiency of the recovery boiler.

Claims (1)

Invention Formula ° The waste-heat boiler containing a flue with a ceiling, divided by a longitudinal partition made of pipes of a heating surface, into a furnace equipped with a burner and a convection chamber connected to each other through a gas passage opening located in the lower part of the furnace - u and with the fact that, in order to intensify heat exchange, the gas-transmission window is formed by wiring into the festoon the partition pipes bent to the side of the furnace, adjacent to the ceiling, on which the burner plate is installed trio. 40 -A noSepHtjmo 4f v ji liiiiiiii.i iitNKNMSHSHNHS: (ig.2