SU1361432A1 - Device for burning masouted fluxes - Google Patents

Abstract

The invention relates to the fire disposal of wastewater containing organic components, and can be used in the chemical, petroleum refining industry, as well as in heat and power engineering, where process waste is generated and there are heat utilizing installations with flare burning fuel, and is aimed at providing operational. economical single disposal of low-calorie waste with mechanical impurities and varying moisture content. A metal pipe 6 is introduced into the furnace 1, forming in the volume of the furnace a coil 7 with a width smaller than the diameter of the barrel of the burner 2 and a depth 2-4 times greater than the diameter of the barrel. The outlet section of the pipe 6 is located outside the coil 7 and is a nozzle 8 that is shaped as a slit. Oiled effluents are fed along the axis of a pulverized coal plume through pipe 6. Due to the thermal radiation from the caustic torch, the effluent stream inside the coil is heated to the saturation temperature of the water vapor and partially evaporated. At the same time, the rate of the vapor-liquid mixture of effluent increases, as a result of which the unwax part of the effluent is split and burned in the core of the pulverized coal plume. 3 il. 3 cl with O5 S

Description

The invention relates to the incineration of wastewater containing organic components, and can be used in thermal power plants and in industrial power engineering, where a flare method is used to burn fuel in chamber furnace devices.

The purpose of the invention is to provide efficient, cost-effective disposal of stock by mechanical impurities and varying water content in a wide range.

Figure 1 shows the structure of the device; figure 2 - node I in figure 1; on fig.Z - section A-Anafig.K

The device contains a combustion chamber 15 in the wall of which a turbulent burner 2 is installed with annular channels 3 and 4, respectively, for supplying the air-pressure mixture and secondary air, as well as a centrally located hollow barrel 5. A metal tube 6 is introduced into the furnace 1 through barrel 5 The furnace 1 along the axis of the burner 2 stretches coil 7. The outlet section of the pipe 6 is located outside the coil 7 and is a nozzle 8 made in the bidet slot.

The device works as follows.

Contaminated wastewater with a moisture content varying in a wide range (W 0.5–1.0 kg / kg) and an insoluble solids concentration of less than 5% from the accumulation point is fed to the combustion chamber 1. The effluent is pumped. and a temperature sufficient for the condition of waste transport to the zone of disposal,

A turbulent burner with a speed of 15-25 m / s is fed into the turbulent burner 2 through the annular channel 3 into the combustion chamber 1, which ignites beyond the turbulent burner 2 limit. at a speed of 20-30 m / s. At the same time, the coefficient of excess air in the flare is maintained not lower than 1.15.

At the level of entry into the combustion zone of the air-fluid mixture in the center of the combustion chamber 1, when burning solid fuel, the temperature develops above

 1600 ° C. As a result, the heat radiation power of the flame in this zone of the furnace exceeds 200–10 kcal / m. Polluted effluents brought to the border of the combustion chamber 1 are fed to the burning zone of solid fuel along the pinch torch axis (through the root of the flame). The effluent stream is introduced into the furnace chamber 1 through pipe 6, without pre-spraying the drains, then they are heated inside coil 7 of pipe 6 located in the center of the flare. Behind: due to thermal radiation of the pycnegate torch, the effluent stream inside coil 7 is heated to the temperature of the water vapor content (above 1) and partially evaporated. The flow of waste and the size of the heating surface coil 7

0 is set in such a way that the pressure of the formed vapor-liquid mixture inside the coil 7 (heating zone) by the time of spraying is 15-30 atm, and the mass vapor content is

5 leaving the heating zone (at the exit of the nozzle 8) exceeds 0.05 kg / kg. As a result of steam generation and high specific volumes of steam, the velocity of the vapor-liquid mixture of effluents

0 increases from 0.3-0.5 m / s at the entrance to coil 7 (heating zone) to 50-100 m / s at the time of spilling out at the exit of the nozzle 8. With a high-speed discharge of the vapor-liquid mixture from the nozzle 8

 Within the combustion zone of the dust, the evaporated part of the effluent is sprayed into the smallest droplets by vapor of the evaporated part of the waste. Sprayed liquid phase drains and vapors

0 are burned in the high-temperature zone of the plate-like torch due to the excess air entering the combustion chamber 1 through the annular channel 4 of the turbulent burner 2. Quantity

g of excess air is determined by the moisture of the effluent. Combustion products of coal dust and oily effluents are removed outside the combustion chamber 1.

Preheating drains them

0

five

Partial evaporation and final bleaching is carried out in the very core of the coal-dust torch outside the ignition front of the coal dust, i.e. inside the combustion chamber.

The optimum ratio of the depth of the coil (1) to the diameter of the barrel (d) is when the ratio is 1, / d ,. less than 2jO noticeably reduced surface

3 1

heating the coil, the recuperative heating of the effluents in the flare core deteriorates, the evaporation rate of the effluents inside the coil decreases, the quality of atomization of the substances decreases due to the reduced steam content, which impairs the efficiency of the combustion of the effluent. When the ratio l./d is greater than 4.0, the resistance of the spraying element (coil) increases noticeably with an increase in the thermal perception of the heating surface inside the torch, which leads to an increase in energy consumption for the supply to the furnace.

The optimal distance from the transverse nozzle of the coil of the pipe (1) to the burner embrasure is 3-5 times the barrel diameter (df,). With respect to le / dj, less than 3.0 turns of the pipe is outside the ignition front of the fuel (derived from the volume of the torch), which worsens the conditions of heating of the coil and reduces its throughput capacity and quality of threading. With a ratio greater than 5.0, the scale-resistance of the coil is reduced (the service life is reduced).

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The use of the invention allows to provide operational and economical (with minimal costs) fire disposal of low-calorie drains with mechanical impurities and varying on a large scale by the state content in the combustion chamber of the boiler equipped with round burners.

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Claims (1)

Invention Formula A device for incinerating oily effluent in a fuel plume containing a chamber furnace with a turbulent burner, characterized in that, in order to ensure efficient, cost-effective disposal of mechanical wastewater with varying moisture content in a wide range a metal pipe forming a coil in the volume of the furnace smaller than the diameter of the burner barrel and 2–4 times deeper than 25 the diameter of the barrel, the outlet nozzle of the tube being made in the form of a slit, and the distance from it is up to the embrasure of the burner 3-5 times the diameter of the barrel 1. 15 20 Editor N. Bobkova Compiled by T. Lepahina Tehred I.Popovich Proofreader O. Kravtsova Order 6214/42 Circulation 495 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