SU1530882A1 - Installation for combusting waste water dresidues - Google Patents

Abstract

This invention relates to wastewater incineration devices and can be used in various industries and households. The aim of the invention is to reduce the energy intensity of the plant by using the heat of the ash for drying and dewatering the sludge. A cyclone 3 is installed between the furnace 1 and the drum dryer 17, which precipitates hot ash, the temperature of which is 800 ° C, on the lower grid 6 of a belt filter press, where it contacts through the grid 8 with a wet sludge, heats it and simultaneously absorbs moisture from the sediment. 1 il.

Description

The invention relates to devices for the incineration of sewage sludge from sewage treatment plants and can be applied, for example, in different industrial and household sectors.

The aim of the invention is to reduce the energy intensity of the installation by using the heat of the ash to dry and dewater the sewage sludge.

The drawing shows a sewage sludge incinerator.

The installation contains a fluidized bed furnace 1 connected by pipeline 15 2 to cyclone 3 to precipitate ash into bunker A. A screw conveyor 5 is built into the bottom of bunker 4, which distributes the ashes uniformly along the width of the bottom grid 6 of the three-mesh press filter 20.

Another screw conveyor 7 is designed to distribute the wet sludge on the grid 8, 11 pressed by the grid 9.25

Grids 6, 8 and 9 with sediment and ash enclosed between them are directed through pressing 10 and leading 11 shafts. Over the press shafts 10 is installed suction cap 12.30

Conveyors 13 and 14 respectively are used for unloading wet ash and dried sludge.

Cyclone 3 with pipeline ID is connected with gases through pipeline 15 ppp - together with sediment gives: transpsftoa 14 to loading chamber 16 of the rotary drum dryer 17.

Jaz dryers 17 sediment enters the furnace 1 and burns.

Ash from the slope 3 is deposited in the hopper 4 and the screw conveyor 5 is distributed over the width of the lower screen 6, and the sediment by the screw conveyor 7 is distributed along the grid 8.

Thus, the hot ash is separated with sediment mesh 8, and all three grids 6, 8 and 9 of the filter press together with the prisoners inside their EULA and sediment move to the area of the press rolls 10 with alternating loads. In this zone, tola, which is highly hygroscopic, absorbs a part of the moisture from the sludge and dries the sludge, heating it with its temperature, and there is intense evaporation of moisture, which is removed through the suction cap 12 to the recovery and purification section.

Then ash is transported by conveyor 13 to a dump, and sediment by conveyor 14 enters the charging chamber 16 of the rotary drum dryer 17. The humid air from the drum dryer 17 also, as well as from under the extraction hood 12, through the tube from the loading chamber 16 is drum - 35 enters the recuperative dryer compartment 17. The drum dryer 17 and the cap 12 by the pipeline 18 are in communication with the gas recovery and cleaning unit.

The installation works as follows.

In the steady-state burning of sludge in the furnace, along with the flue gases, the unburned mineral part of the sludge (ash) is removed, which reaches 50% of the total sludge in relation to sewage sludge from the pulp and paper industry.

Since the burning process of inert sand in the furnace usually takes place at temperatures up to 900 ° C, the exhaust flue gases and ash have a temperature slightly below 800 ° C.

The flue gases along with the ash through pipeline 2 enter the cyclone 3, where the main part of the ash is captured and the rest of it together with the chimneys40

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walkie-talkies and cleaning.

The design of the device makes it possible to significantly save energy by incinerating sewage sludge by using the heat of the precipitated (ash) precipitated mine-HepioibHof. Placing a cyclone between a furnace and a drum dryer over a three-mesh filter press allows you to apply a zero to one of grids of filter presses and in case of contact between grids, carry out heat and hygroelectric from ash to sediment.

Claims (1)

Image formula A sewage sludge incinerator, containing a fluidized bed furnace, a drum dryer, transport units and pipelines, in order to reduce the energy intensity of the installation by using heat from the ash for drying and sludge dewatering, the plant is equipped with gases through the pipeline 15 PPP - gives together with the sediment: transpsftoya 14 into the loading chamber 16 of the continuous drum dryer 17. Jaz dryers 17 sediment enters the furnace 1 and burns. Ash from the slope 3 is deposited in the hopper 4 and the screw conveyor 5 is distributed over the width of the lower grid 6, and the sediment by the screw conveyor 7 is distributed on the grid 8. Thus, the hot ash is separated with sediment mesh 8, and all three grids 6, 8 and 9 of the filter press together with the prisoners inside their EULA and sediment move to the area of the press rolls 10 with alternating loads. In this zone, tola, which is highly hygroscopic, absorbs a part of the moisture from the sludge and dries the sludge, heating it with its temperature, and there is intense evaporation of moisture, which is removed through the suction cap 12 to the recovery and purification section. The ash is then removed by the conveyor 13 and the sediment is transported by the conveyor 14 into the loading chamber 16 of the rotary drum dryer 17. The humid air from the drum dryer 17 also, as well as from under the extraction hood 12 five 0 five walkie-talkies and cleaning. The design of the device makes it possible to significantly save energy by burning sewage sludge due to the use of heat from the precipitated ash (ash) collected by the mypioibHof. Placing a cyclone between a furnace and a tumble dryer over a three-mesh filter press allows you to feed a zero to one of filter presses and in contact with the grids to carry out heat and hygroelectric from ash to sediment. Image formula An installation for incinerating sewage sludge containing a fluidized bed furnace, a drum dryer, transport bodies and pipelines, in order to reduce the energy intensity of the installation by using the heat of ash for drying and dewatering sludge waste, the unit is equipped with a cycle 1530882 the bottom and a three-installed under it between the furnace boiling with a mesh belt filter press, a bed and a drum dryer.