JPH08152121A - Power plant by refuse incineration - Google Patents

Abstract

PURPOSE: To provide a power plant which is capable of reducing a running cost to an extremely lower extent compared with the application of gas or kerosene or the like by using oil collected from waste plastics as a reduction combustion fuel in a refuse incinerator. CONSTITUTION: Waste gas exhausted from a refuse incinerator 1 is supplied to a boiler 2 where generated steam is supplied to a steam turbine 5, thereby driving a generator 6 and generating a specified power. On the one hand, after the exhausted steam from the steam boiler 5 is condensed with a condenser 7, it is heated with a water supply plant 8 and an economizer 9 and then water is supplied to the boiler 2 once again. In this case, a fuel supply device 10 separates vinyl chloride or the like from fractionated waste plastics with a vinyl chloride separation device. The waste plastics from which vinyl chloride is separated and removed, is heated with an oil processing device 12 at a high temperature and then the heated oil is cooled and oil is processed. Furthermore, the collected oil is supplied to a reduction combustion area of the refuse incinerator 1 with a fuel pump 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generation facility for waste incineration.

[0002]

2. Description of the Related Art There is a power generation facility that uses steam generated by waste heat from a refuse incinerator to generate power. As shown in FIG. 2, this type of power generation equipment has a boiler 52 that generates steam by the heat of the exhaust gas from the refuse incinerator 51, and water is sprayed onto the exhaust gas that exits the boiler 52 to cool it to a predetermined temperature. Temperature control tower 53, fly ash in the exhaust gas cooled to a predetermined temperature in temperature control tower 53, and slaked lime are added to the exhaust gas exiting temperature control tower 53 to remove products that have reacted with harmful components such as hydrogen chloride. A bag filter 54, a steam turbine 55 driven by steam generated in the boiler 52, a generator 56 driven by the steam turbine 55, and a condenser 57 of exhaust steam discharged from the steam turbine 55. When,
It is composed of a water supply facility 58 for heating and degassing the condensed water discharged from the condenser 57 to supply the economizer 59 and the boiler 52 with water.

In the refuse incinerator 51,
In order to suppress the NO _X generated in the waste incinerator 51,
A fuel such as gas or kerosene is supplied near the exit of the primary combustion zone (primary combustion chamber) to re-combust (also referred to as reburning) to form a reducing combustion zone in the furnace, and an upper part of Complete combustion was performed by supplying secondary combustion air.

[0004]

However, according to the structure of the conventional power generation equipment for waste incineration, the waste incinerator 51 is used.
Since gas or kerosene is used as the fuel for reducing combustion in the above, there is a problem that the running cost is high.

Therefore, an object of the present invention is to provide a power generation facility by incineration that can solve the above problems.

[0006]

In order to solve the above problems, a power plant for refuse incineration according to the present invention comprises a refuse incinerator, and a boiler for guiding exhaust gas generated in the refuse incinerator to generate steam. Power generation consisting of a steam turbine driven by steam generated in this boiler and a generator driven by this steam turbine, and a reduction combustion zone is formed near the outlet of the primary combustion zone in the refuse incinerator. In the equipment, a fuel supply device that supplies fuel to the above reduction combustion zone, a vinyl chloride separation device that separates vinyl chlorides from waste plastic crushed by a crusher, and a vinyl chloride separation device that separates vinyl chlorides It is composed of an oilification device that oilizes waste plastic.

[0007]

According to the above construction, since the oil recovered from the waste plastic is used as the fuel for the reduction combustion in the refuse incinerator, the running cost is lower than the case of using gas or kerosene.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 1, the power generation equipment according to the present embodiment includes a refuse incinerator 1, a boiler 2 that guides the exhaust gas generated in the refuse incinerator 1 to generate steam, and an exhaust gas discharged from the boiler 2. Water is sprayed onto a specified temperature (a temperature at which the bag filter described later can be used, for example 170 ° C)
Temperature control tower 3 for cooling to a certain degree), fly ash in the exhaust gas cooled to a predetermined temperature by the temperature control tower 3 and slaked lime added to the exhaust gas exiting the temperature control tower 3 to form harmful gas components such as hydrogen chloride. A bag filter 4 for removing the reacted products, a steam turbine 5 driven by the steam generated in the boiler 2, a generator 6 driven by the steam turbine 5, and a steam turbine 5 discharged from the steam turbine 5. Exhaust steam condenser 7
And a water supply facility 8 for heating and degassing the condensate discharged from the condenser 7 to supply the economizer 9 and the boiler 2.

Further, in this power generation facility, in order to suppress NO _X generated in the refuse incinerator 1, fuel is supplied near the outlet of the primary combustion zone (primary combustion chamber) and the reducing combustion zone is introduced into the furnace. A fuel supply device 10 for forming and reburning (also referred to as reburning) is provided.

In this fuel supply device 10, after the waste plastics that have been separated and collected are crushed by a crusher, the waste plastics are separated again, and vinyl chloride separation is performed to separate vinyl chlorides from the separated waste plastics. A device 11, an oiling device 12 that heats the waste plastic from which vinyl chlorides have been separated and removed by the vinyl chloride separating device 11 to a high temperature (350 to 450 ° C.), and then cools it to oil, and this oil The fuel pump 13 supplies the recovered oil recovered by the gasification device to the reduction combustion region of the refuse incinerator 1. Needless to say, the waste incinerator 1 corresponding to this reduction combustion region is provided with the recovered oil supply nozzle 14.

In the above structure, the exhaust gas discharged from the refuse incinerator 1 is sent to the boiler 2, where steam is generated. Then, this steam is supplied to the steam turbine 5 to drive the generator 6 and generate a predetermined electric power. The exhaust steam discharged from the steam turbine 5 is transferred to the condenser 7
After being reconstituted with water, the water is heated by the water supply facility 8 and the economizer 9, and then supplied to the boiler 2 again.

By the way, in the refuse incinerator 1, the waste is primarily burned by the primary combustion air, but in the vicinity of the outlet of the primary combustion region, the recovered oil separated and recovered from the waste plastic is supplied as fuel and reduced. Burning takes place. Then, in the upper portion thereof, secondary combustion air is further supplied to perform complete combustion, and N contained in the exhaust gas.
Generation of O _X is suppressed.

The secondary combustion air is heated by, for example, a heat exchanger 15 provided on the way of the exhaust gas discharge path, and the heated secondary combustion air is supplied into the refuse incinerator 1.

As described above, since the recovered oil recovered from the waste plastic is used as the fuel for the reduction combustion in the refuse incinerator 1, the running cost is much higher than that when gas or kerosene is used. Become cheap.

[0015]

As described above, according to the structure of the present invention, since the oil recovered from the waste plastic is used as the fuel for the reduction combustion in the refuse incinerator, compared with the case of using gas or kerosene. , Running cost can be very cheap.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a power generation facility according to an embodiment of the present invention.

FIG. 2 is a diagram showing a schematic configuration of a power generation facility in a conventional example.

[Explanation of symbols]

 1 Waste Incinerator 2 Boiler 5 Steam Turbine 6 Generator 10 Fuel Supply Device 11 Vinyl Chloride Separation Device 12 Oilification Device 13 Fuel Pump

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiro Suto 5-3-28 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd.

Claims (1)

[Claims] 1. A refuse incinerator, a boiler that guides exhaust gas generated in the refuse incinerator to generate steam, a steam turbine driven by the steam generated in the boiler, and a steam turbine driven by the steam turbine. In a power generation facility that is composed of a generator and a reduction combustion zone is formed near the outlet of the primary combustion zone in the refuse incinerator, a fuel supply device that supplies fuel to the reduction combustion zone is crushed by a crusher. Waste incineration characterized by being composed of a vinyl chloride separator that separates vinyl chloride from the waste plastic that has been separated, and an oilizer that oilizes the waste plastic from which vinyl chloride has been separated by the vinyl chloride separator Power generation equipment by.