SU1451463A1 - Apparatus for reburning waste gases - Google Patents

Abstract

The invention relates to environmental protection and can be used for the disposal of waste gases containing significant amounts of combustible toxic impurities in the mining, oil producing and other industries. The purpose of the acquisition is to increase the productivity of the device by using the heat generated during the combustion of high-energy waste gases. Around the outflow channel 11 of high-temperature gases and the afterburning chamber 10 on both sides of the exhaust channel are made spiral-shaped collectors 8 with nozzles 9 for supplying additional waste gas. The arrangement of nozzles for supplying additional waste gas permits the supply of cold waste gas in small portions and displace it with hot gas. The nozzles cover the entire volume of their hot gases. The mixing zone of the combustion chamber and the discharge channel. By utilizing the heat of high-calorific gases without preheating additional gases in the heat exchanger, the flow rate of the gas passing through the heat exchanger is reduced, and the volumes of regenerative heat exchangers are reduced. The performance of the device is increased without increasing the volume of the afterburning chamber. 1 il. i (L

Description

The invention relates to the protection of the environment and can be used for the disposal of waste gases containing a significant amount of combustible toxic impurities in the mining, oil and other industries.

The aim of the invention is to increase the productivity of the device due to the use of heat generated during the combustion of high-calorie waste gases.

The drawing shows a device for afterburning waste gases.

The device comprises a heat-insulated housing 1, regenerative chambers 2, filled with a nozzle, a crossover valve 3, pipes 4 and 5 of purified and waste gas, respectively, pipe 5 is branched into the main 6 and bypass 7 pipelines with spiral collectors 8 having nozzles 9 for supplying waste gas to afterburning chamber 10 on both sides of the discharge channel II. The outlet channels have pinches 12. The burner 13 is installed in the afterburner 10.? The device is equipped with a regulating choke 14 and a thermocouple 15 located in the outlet channels.

A device for afterburning waste gases works as follows.

Using the burner 13, the device is heated to a predetermined temperature and through the waste gas pipe 5 through the main pipe 6, the crossover valve 3, the waste gas is supplied to one of the regenerative chambers 2. In the regenerative chamber, the waste gas is heated and, at the ignition temperature, combustible toxic gas components burn out.

Since gases contain a significant amount of combustible components and, when they are burned, the temperature will be higher than the neutralization temperature of toxic impurities, the further process of thermal neutralization of gases occurs without additional heat.

After exiting the nozzle of the regenerative chamber 2, the gases pass pin 12 and enter the afterburning chamber 10, where they are intensively mixed with cold waste gases, which through the bypass pipe 7, spiral collectors 8 and nozzles 9 tangentially directed into the afterburning chamber and into the high-temperature exhaust channel 11 gases bypassing heat exchangers.

When mixing gas flows, the temperature of the gas mixture decreases, and after heating the cold waste gas above the ignition temperature of toxic combustible impurities, the temperature of the gas mixture rises, so the cold gas must be supplied sequentially in small portions.

The location of the nozzles for supplying waste gas in a spiral line in the exhaust channel and in the combustion chamber on both sides of the exhaust channel allows you to supply cold waste gas in small portions and mix it intensively with hot gas. The nozzles cover the entire volume of hot gases of the mixing zones of the combustion chamber and the exhaust channel. Here, an intensive swirling of gas flows takes place: the gas jet comes into contact with the subsequent cold stream of waste gas, the mixing and combustion process ends, and the subsequent mixing of gases begins, etc., until completely hot and cold waste gases are mixed. This can significantly increase the performance of the device. The waste gases leaving the regenerative chamber 2 are pre-mixed with cold waste gas, the final mixing takes place in the second half of the afterburner 10 and in the exhaust channel 11 of the high-temperature gases. Partially diluted in the first half of the afterburning chamber 10, the gases branch out. Part of the gas enters the exhaust channel 11 to remove high-temperature gases, where it is also mixed with cold gas · and at the neutralization temperature, toxic components of the waste gas burn out. Gases pass pinch 12, finally mix and neutralize from toxic impurities and are removed from the device for the afterburning of waste gases. The rest of the gas enters the second half of the afterburning chamber 10, is mixed with cold waste gas, passes through the afterburning chamber, pinch 12 and enters the regenerative chamber 2, the nozzle is heated, and the cooled gases are removed to the atmosphere through the crossover valve 3. After heating the second nozzle of the regenerative chamber and cooling the first by means of the crossover valve 3, the direction of gas movement changes to the opposite, etc.

An equal amount of cold waste gas is supplied to both halves of the afterburner, which eliminates the use of a switching device when changing the direction of movement of gases in the device.

The exhaust gas nozzles in the exhaust channel are made of a larger cross section, which allows one to regulate the supply of cold gas with one throttle installed in front of the exhaust channel collector. To control the thermal process, thermocouples are installed at the end of the mixing zones 15. When the temperature at the end of the afterburning chamber decreases and its temperature increases in the outlet channel, the flow of cold gas in the outlet channel and the temperature of the gas mixture at the end of the chamber increase by opening the control choke 14. the afterburning in the discharge channel is leveled, and with increasing temperature at the end of the afterburning chamber and lowering in the discharge channel by closing the throttle 14, the temperatures are equalized.

A device for afterburning waste gases can be used in the oil industry for afterburning waste gases from in-situ combustion.

Due to the use of heat of high-calorific gases without preheating an additional volume of gas in the heat exchanger, the flow rate of gas passing through the heat exchanger decreases, respectively, the volumes of regenerative heat exchangers and the energy consumption consumed by the smoke exhauster are reduced. Productivity improves without

451463 increase in the volume of the nozzle and afterburner.

Claims (1)

Claim 5 A device for the afterburning of waste gases, comprising a thermally insulated body, regenerative chambers filled with a nozzle, a combustion chamber, in the middle part of which there is a discharge channel with a high temperature gas bypassing the heat exchangers, a burner, a flap valve with pipes for cleaned and waste gases, characterized in that that, in order to increase the productivity of the device due to the 15 use of heat generated during the combustion of high-calorie waste gases, it is equipped with a high otemperaturnyh gases and afterburning chamber exhaust channel on both sides, spiraleobrazny20 E collectors with nozzles for supply of additional waste gas. Compiled by T. Lepakhin Editor M. Bandura Order 7062/35 Tehred I. Veres Proofreader L. Pilipenko Circulation 488 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 1 13035, Moscow, Zh-35 ,. Raushskaya nab., D. 4/5 Production and printing company, Uzhhorod, st. Design. 4