SU1723411A1 - Installation for evaporating and decontaminating liquid wastes - Google Patents

Abstract

The essence of the invention is a plant for evaporation and neutralization of liquid waste. : - .. Outlet air outlet - AAL with water holding vessel 1 / combustion device 4 of submersible combustion with a burner device, exhaust gas duct 8 of the furnace, devices, pipeline for supplying outflow of effluent. The exhaust gas flue duct is made of two cylinders, the axes of which are displaced one relative to the other, with the axis of the outer cylinder coinciding with the vertical axis of the tank, and the axis of the inner cylinder is displaced towards the burners. The space between the cylindrical wall of the tank and the outer cylinder in the upper part of it is connected to the combustion device. In the upper part of the space there is a feed inlet of the pipeline for the initial sewage, and in the lower part - inlet air. 5 il. SL C

Description

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The invention relates to environmental protection and can be used in various sectors of the industry for immobilizing wastewater.

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

FIG. 1-5, an installation for evaporation and disposal of liquid wastes is presented, a general view and sections.

The installation includes a tank 1 with a cylindrical wall 2 and a conical bottom 3. The combustion device A is in the form of an annular tunnel with an air duct 5, a burner device 6, nozzles 7 for end-15 centralized effluent, a discharge duct 8. The duct 8 is limited two cylinders, axles. which are displaced one relative to another :: - large external. cylinder 9, the axis of which coincides with the vertical axis of the container, and the internal smaller cylinder .10, whose axis is displaced towards the placement of the burner device 6. The space bounded by the cylindrical wall 2 of the container 1 and 25 by the external large cylinder 9. is associated with the space air, the box 5 of the furnace device 4 and has placed in. in the upper part, the inlet pipes of the source: effluent, and in the lower part - inlet and air inlets.

The installation works as follows. Zom, -

Initial flows through supply pipelines - cuttings of the source drain pipe enter the space. Between the cylindrical wall .2 of the container 1 and the outer cylinder 9 of the exhaust duct 8 of the combustion device 4. An air flow is fed to the lower part of the space through the nozzles 40 of the air inlet. The passage through the source effluent, the air evaporates the lightly boiling organics from them, selects heat, from the Wall 9 of the flue gas duct 8 of the furnace device 4. The light boil organic material 45 enters the air duct 5 of the furnace device 4 together with air and through the burner device b - inside the furnace device 4, where fuel and concentrated effluent flows through nozzles 7 .. 50 Fire treatment products of lightly boiled organic matter and concentrated effluents through the exhaust gas duct 8 enter the bubble evaporator in the tank 1, a layer of effluent, give off heat to the effluent for 55 evaporating the ballast — water and at the same time being washed away from the mineral waste. . sa Concentrated wastewater is pumped through the volume of the combustion device 4 through the Nozzles 7.-Waste pz; l; Azov

the mixture passes through a separator and, if necessary, a heat exchanger.

One of the main elements of the installation - the evaporator - works on the principle of centrifugal-foam evaporator, without a gas distribution grid. Due to the absence of a gas distribution grid, the reliability of the evaporator is high, but this requires a uniform distribution of gas throughout the evaporator volume, which is ensured by a variable cross section of the flue gas discharge pipe. The displacement of the axes of the cylinders 9 and 10 of the flue gas duct towards the burner device results in equality of resistance along the length of the annular combustion chamber.

The use of the proposed plant allows increasing the degree of neutralization and reliability of operation due to pretreatment of the source effluent in the allocated space with air (stripping of light boiling organics), concentration of the source effluent in a bubbling foam evaporator and treatment of concentrated effluent in the fire chamber, i.e. the disposal process takes place with much less blistering of the treated effluent. The reliability of operation is enhanced by the fact that the main processes take place at lower temperatures: hot combustion products have a much smaller surface contact. The proposed design allows for a stepwise operation and, for each stage, optimum working conditions. The annular tunnel furnace allows to increase the intensity of the mixture formation processes at low energy costs, volume loads at low loads across the cross section, which ensures an adequate residence time in the reaction volume. The displacement of the axes of the outer and inner cylinders of the flue gas duct allows to obtain an even distribution of hot products in the evaporator volume, which minimizes energy costs and reliability of operation. The connection of the space between the cylindrical wall of the tank and the outer cylinder with the air duct of the combustion device makes it possible to increase the degree of neutralization of boiling organic matter, as it enters with the combustion air into the high-temperature zone.

Thus, the design of the installation ensures the highest degree of neutralization and reliable operation by ensuring optimal flow conditions.

all stages of the process: good conditions for mass transfer and high temperature are created in the reaction zone, where drains with a high concentration of harmful impurities and with a reduced amount of ballast are fed; Stripping of light boiling organics is carried out with combustion air, which increases the degree of neutralization and reliability of equipment operation; the fire treatment products of the concentrate are washed with the original effluent. The equipment for the evaporation and neutralization of liquid wastes, containing a container, a furnace, a submerged combustion device with a burner, a flue gas outlet of the furnace, a feedstock supply pipe, different from. the fact that, in order to increase: the degree of deactivation and reliability in operation, the exhaust gas flue duct is made of two cylinders, the axis

which are offset one relative to another, and the axis of the outer cylinder is the same. gives the vertical axis of the container, and the axis

the inner cylinder is displaced in direction to the burner, with the space between the cylindrical wall of the tank and the outer cylinder in its upper part connected to the combustion device, s the upper part of the space

The inlet pipe of the initial sewage pipe was installed, and in the lower part -. air inlets.

Claims (1)

Formulation system for evaporation and neutralization of liquid waste, containing a tank, furnace, submersible 15 combustion device with a burner device, a flue gas outlet duct, a source for supplying waste water, o t l and chayushchaya with. I am the one. what. in order to increase the degree of neutralization and reliability in operation, the exhaust gas duct of the furnace yct5 device is made of two cylinders, for which they are offset one from the other, the axis of the outer cylinder coinciding with the vertical axis of the tank, and the axis of the inner cylinder shifted towards the burner devices, and the space between the cylindrical wall of the tank and the outer cylinder in its upper part is connected to the combustion device, in the upper part of the space is the inlet pipe of the source pipe currents, and the bottom of the air supply pipes.