LT6131B - Installation for sewage sludge recovery and recycling into ecological products - Google Patents

Abstract

The invention is related to the field of sewage sludge recovery-recycling. A metal vessel (1) is designated for loading sewage sludge, while a screw conveyor (4) is mounted for delivering it to an incineration boiler (3) in the first combustion chamber (2). A collector (9) is designated for collecting produced biogas and is connected to a supply line that supplies biogas as fuel to an internal combustion engine connected to an electricity generator (10). For the combustion of the evolved combustible gas, the main gas burner (11) is installed in the second combustion chamber (6) and an additional plasma-gas burner (13) connected with a plasma source and gas tank (14) is mounted. A spatial channel grating (12) is designated for heating ambient air entering the burner (11).

Description

The invention relates to the field of utilization and recycling of sewage sludge and can be used for the production of heat and electricity.

The closest known invention to the technical solution disclosed in RU patent no. 2182884, TPKK: F 23 G 5/027, F 23 G 7/00, publ. 2002 for the disposal of organic, municipal and municipal waste consisting of a recovery hopper, conveyor, pyrolysis reactor with reaction chamber, gas distribution systems, combustion chamber at the bottom of the pyrolysis reactor, and ash collection vessel. The pyrolysis reactor is heated by combustion of a gas mixture consisting of feed air and recycle gas released during pyrolysis.

A well-known technical solution does not allow an efficient recovery process to be achieved due to insufficient heating temperature. In addition, the functional capabilities of a known technical solution are limited.

The purpose of the invention is to ensure an ecological and efficient recovery - recycling process by raising the heating temperature and to extend the functional possibilities by utilizing the ecological products obtained during the utilization.

The invention is illustrated in the drawing, which shows a schematic diagram of a sewage sludge utilization - recycling plant into organic production, where 1 metal vessel for sewage sludge loading, 2 - first combustion chamber, 3 - sewage sludge burning boiler, 4 - sewage sludge transport screw conveyor, 5 - electric engine, 6 - Second combustion chamber, 7 - Particle collector, 8 filter, 9 - Biogas collector, 10 - Power generator, 11 - Main gas burner, 12 - Spatial duct for supply air from the heating grate, 13 - Universal plasma- gas burner, 14 - plasma source and gas tank, 15 ash feeder with screw conveyor and electric motor 17, 16 - ash bin, 17 - electric motor, 18 - chimney, 19 - chimney draft regulator, 20 - power supply line.

A metal vessel 1 is used for loading sewage sludge and a screw conveyor 4 is provided for transporting and supplying sewage sludge to the sewage sludge boiler 3 in the first combustion chamber 2, which is driven by an electric drive powered by an electric motor 5. To transport it from sewage sludge a screw conveyor 4 located in the second combustion chamber 6 for separating particulates, a particulate trap 7 located beneath the screw conveyor 4, and a biogas hopper 9 for collecting biogas obtained from the incineration of sewage sludge and for separating the minor undesirable impurities a supply line supplying biogas as fuel for an internal combustion engine (not shown), to which an electrical generator is connected burner 11. For heating the incoming air from the ambient to the burner 11, there is provided a spatial ducted supply air heating grate 12. In addition to the main gas burner 11, the second combustion chamber 2 is additionally equipped with a universal plasma gas burner 13 connected to a plasma source and gas vessel 14. activation of the burner 13 would be required if the main gas burner 11 was not in operation. The ash from the ash feeder 15 to the ash bin 15 was transported in an ash feeder 15 with an electric drive powered by an electric motor. 17. In addition, the ash collection box 16 is equipped with ash filtering elements (not shown). Chimney 18 with draft regulator 19 is installed for removal and disposal of combustion products.

The unit operates as follows.

First, sewage sludge is loaded into the metal vessel 1. It is then transported from the metal vessel 1 by screw conveyor 4 to the first combustion chamber 2 via the second combustion chamber 6. The transported sewage sludge dries and dries and enters the sewage sludge combustion boiler 3 located in the first combustion chamber 2. The sewage sludge transported by the screw conveyor 4 not only dries but also removes particulate matter and other minor impurities. The particulates are collected by the hopper 7 and the finer impurities are prevented by the filter 8. The combustible gas from the combustion of solid fuels in the first combustion chamber 2 enters the main gas burner 11. Also, the main burner 11 enters air from the heated 12. The flammable gas mixture formed in the main burner 11 burns at a high temperature up to 2800 ° C. Sewage sludge combustion boiler 3 with sewage sludge heats up from the resulting heat. In this way the heat treatment of sewage sludge takes place, whereby biogas is released. Biogas from the sewage sludge combustion boiler 3 is collected by a biogas collector 9, which feeds it as fuel to the internal combustion engine.

(not shown in the drawing), which in turn drives an electric generator 18. In this way, mechanical energy is converted into electrical power. In the event of malfunction of the main gas burner 11, the universal plasma gas burner 13 is activated. The ash from the ash feeder 15 is pushed out by the screw conveyor and fed to the ash bin 16. The disposal of sewage sludge takes place according to a process control program.

An important advantage of the present invention is that the unit for recycling sewage sludge into organic production provides an economical, environmentally friendly and efficient process. Particularly the efficiency of the process is influenced by the high heat of combustion resulting from the combustion of the flammable gas mixture at high temperatures (about 2800 ° C). Products such as ash and biogas from the disposal process are environmentally friendly and suitable for further use. Namely, the claimed technical solution solves the use of the separated biogas as a fuel, which enables easy access to cheap electricity and meeting the needs of consumers without any additional costs. Because biogas has a low calorific value compared to natural gas, it can also be used to generate thermal energy.

Claims (3)

DEFINITION OF INVENTION 1. Sewage sludge recovery unit - a plant for recycling organic products, consisting of an organic material storage tank and a recovery vessel, a combustion chamber with a burner, waste gas diverting elements, an ash collecting vessel, characterized in that it consists of a sewage sludge loading vessel which an electric propeller driven by a second combustion chamber and connected to a first combustion chamber containing a sewage sludge combustion vessel connected to a biogas collector, from which a biogas is supplied as fuel to an internal combustion engine connected to an electric generator; in addition, the second combustion chamber is provided with a spatial ducting of supply air from the ambient heating grate and the main gas burner will burn a mixture of flammable gas formed by solid fuel combustion in the first combustion chamber and air heated from the surrounded duct air heating grate , incineration and heating of the sewage sludge incinerator. 2. The sewage sludge utilization - recycling unit according to claim 1, characterized in that the second combustion chamber is additionally equipped with a plasma gas burner connected to a plasma source and a gas cylinder. 3. A sewage sludge recovery / recycling plant according to claim 1, characterized in that a particle collector and a fine particulate filter are located beneath the screw conveyor provided in the second combustion chamber.