JP4297432B2 - Incineration fly ash loading system - Google Patents

Description

  The present invention relates to an incineration fly ash loading system that is used when fly ash is extracted and transported as dry powder from an existing storage tank of an incinerator fly ash treatment facility.

  A large amount of fly ash is generated from incineration sites such as municipal waste, but these are usually reduced by solidification treatment, chemical treatment, and welding treatment, and the treated items are landfilled at the final disposal site. Yes.

FIG. 2 is a diagram showing a conventional system, and the outline thereof will be described.
In FIG. 2, reference numeral 1 denotes a fly ash storage tank, which is connected to the fly ash transport conveyor 2. Reference numeral 3 denotes a solidifying agent storage tank, which is supplied with a solidifying agent via a solidifying agent receiving pipe 4.

  Reference numerals 5 and 6 denote fixed-quantity feeders, and fly ash and solidifying agent supplied through these are respectively fed into the kneader 8 by the transport conveyor 7 and kneaded by the kneader 8 together with the chemical solution from the chemical solution storage tank 9. Then, it is stored in a bunker or pit via the curing conveyor 10 and is disposed to landfill.

  However, there is a limit to the life of the treatment plant, and it is often impossible to plan a new final disposal site. Some of the incineration fly ash is recycled to blocks, bricks, tiles, etc., but it has problems such as high prices and low demand. Note that there is no patent document or the like for the present invention.

  The present invention has been made to solve the above problems, and while using the above-described conventional system, fly ash is extracted from an existing storage tank as dry powder, loaded into a vacuum car, transported to a cement factory, and washed with water. The purpose is to provide an incinerated fly ash loading system that can be recycled as a raw material for cement.

  An incineration fly ash loading system according to claim 1 of the present invention includes a fly ash storage tank for storing fly ash conveyed by a conveyor from an incineration facility, a solidifying agent storage tank for storing a solidifying agent, and each of the two tanks. The first and second metering feeders that measure the fly ash and the solidifying agent respectively provided at the outlet of each of the two, and the fly ash, the solidifying agent from each of the metering feeders and the chemical solution from the chemical solution storage tank are supplied together. And a fly ash treatment facility in which a material to be kneaded from the kneader produces a landfill treatment product via a curing conveyor, the fly ash treatment facility includes dry ash with respect to a vacuum vehicle. A vacuum facility for loading the fly ash as it is, and the vacuum facility is composed of a twin screw feeder provided between the fly ash storage tank in the fly ash treatment facility and the first metering feeder. Pulling device and the stable pulling device Pneumatic transport operation that matches the capacity of the vacuum vehicle by mixing the fly ash that is provided to stably transport the discharged fly ash and the fly ash that passes through the stabilizer with the secondary air required for vacuum transport , A foreign substance removing device that is provided in the middle of the vacuum pipe to remove foreign substances in the fly ash, and a connection joint for connecting to a connection hose on the vacuum vehicle side.

  The incineration fly ash loading system according to claim 2 of the present invention is configured such that, in claim 1, hot air from a hot air generator is blown into a vacuum pipe in a front stage of a fixed amount feeder through a manual valve.

  The incineration fly ash loading system according to claim 3 of the present invention is such that in claim 1, the vacuum pipe is provided with a test tube to visually check the state of the transferred object.

  As described above, according to the present invention, the transportation direction can be switched only by selecting the operation of the stable pulling device, and the loading into the existing processing equipment and the vacuum vehicle can be selected in the rotational direction of the twin screw feeder.

FIG. 1 is a block diagram showing an embodiment of an incineration fly ash loading system according to the present invention. In FIG. 1, the same parts as those in FIG. And the characteristic part of FIG. 1 is the part 100 enclosed with the dashed-dotted line, and this part is called vacuum equipment. Others are the same as the conventional system.
In other words, while the conventional system is used as it is, the part surrounded by the alternate long and short dash line is operated, the incinerated fly ash is extracted with dry ash, loaded into a vacuum car and transported to the cement factory, and the carried fly ash is part of the cement raw material. The main point is to use recycled resources.

  The vacuum facility 100, which is a part added below, will be described. First, the hopper portion of the fly ash storage tank 1 of the conventional system is modified and shortened, a space is provided between the modified hopper and the preset amount distributor 5, and a stable extraction device comprising a twin screw feeder is provided therebetween. 11 was interposed.

In this case, an emergency and maintenance driving gate (filled portion) was provided at the hopper outlet at the bottom of the storage tank. The reason why the twin screw feeder is adopted is to make it possible to supply fly ash from the fly ash storage tank 1 to both the preset amount feeder 5 and the part added this time (vacuum equipment).
That is, forward / reverse operation is possible.

  Reference numeral 12 denotes a stabilizer composed of a cushion hopper, which is stored here as a buffer for fly ash discharged from the twin screw feeder and is controlled by a level meter 13. That is, it is trying to maintain a stable supply and operation stop for leveling control of the biaxial screw feeder, prevention of clogging, and the like. Reference numeral 14 denotes a wire mesh.

  The cushion hopper 12 is made of stainless steel so that the fly ash is not blocked, and an air ration device is provided on the inner surface and a knocker device is provided on the outer surface to prevent bridges. Further, a metal net 14 for separating foreign matters is attached inside to take measures to prevent the foreign matter from getting caught in the downstream machine and clogging in the piping.

  The metering feeder 15 is a rotary feeder type, rotates the wings with an electric motor, performs metering and air sealing, mixes the secondary air and fly ash required for vacuum transportation at the bottom flow through, and vacuums Pneumatic transportation operation that matches the car's ability.

  16 is a secondary air intake, 17 is a check valve, and 18 is a hot air generator that blows overheated air to transport the fly ash without cooling it. Measures were taken to prevent ash adhesion and coaching. 19 is a manual valve, 20 is an automatic valve, and 21 is a viewing tube for visually confirming the moving state of the contents, which is a transparent glass tube. The automatic valve is opened when the operation starts and air is introduced, and the automatic valve is closed when the operation is stopped to prevent the outside air from entering the pipe and perform sealing.

  A foreign matter removing device 22 is attached in the middle of the piping, and the foreign matter and solid matter in the fly ash are removed and collected by the wire mesh 14, and the foreign matter is batch-discharged manually. Reference numeral 23 is a connection joint, and 24 is a connection hose.

The fly ash transport from the incineration plant to the cement factory is carried out by two types of vehicles, a vacuum car and a jet pack car, and the vacuum car is sucked and loaded from the incineration site by piping and discharged by pneumatic feeding while dumping. In addition, the jet pack car is loaded from the upper hatch by natural fall, but a loading place and a dedicated storage tank are required, and the unloading is discharged by pneumatic feeding while being dumped or level.
The unloading at the cement factory is transported by pneumatic feeding with a blower installed in the car, and the same piping can be used as well, and it is received in the receiving tank of the cement factory.

Next, the operation will be described. The operation of the conventional system is performed at the incineration site, and the hazardous materials such as dioxins and heavy metals in the incineration fly ash are kneaded with chemicals in the processing equipment, so that they are processed so as not to be scattered or dissolved in water. It is transported to land and disposed of in landfills.
That is, the collected fly ash is collected in a storage tank, supplied in a fixed amount, kneaded and molded with chemicals and water in a kneader, temporarily stored in a pit or bunker by reaction curing, and put into a final disposal site by a dedicated vehicle. Reclaimed.

On the other hand, in the case of the present invention, it is branched and discharged from the incineration fly ash storage tank by a stable extraction device, level-controlled by the stabilization device, supplied by a fixed amount supply device, and fly ash is secondary at the lower part of the supply device. It is mixed with air and sent.
The fly ash to be sent is hygroscopic and vacuum sucks the outside air as secondary air. Therefore, a fly blast generator is installed to prevent the fly ash from adhering to the transport pipe and to heat the secondary air and to heat the pipe. Removal of solid matter and foreign matters in the fly ash is performed by a foreign matter removing device.
In addition, for transportation to the cement factory, it is extracted with dry ash, loaded into a vacuum car, and transported to the cement factory, so that the existing processing equipment can be used and a vacuum car is adopted.

  Incineration ash is recycled as cement raw material, the fly ash is not processed at the incineration plant, but it is safely recycled as a raw material at the cement plant, and re-scattering of dioxins and heavy metals around the disposal site It can also contribute to environmental problems such as soil contamination and the extension of disposal sites.

The block diagram which shows embodiment of the incineration fly ash loading system by this invention Diagram explaining the conventional system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fly ash storage tank 2 Fly ash transport conveyor 3 Solidifying agent storage tank 4 Solidifying agent receiving pipe 5,6 Fixed quantity feeder 7 Transport conveyor 8 Kneading machine 9 Chemical liquid storage tank
10 Curing conveyor
11 Stable extraction device (biaxial screw feeder)
12 Stabilizer (cushion hopper)
13 level meter
14 Wire mesh
15 Metering machine
16 Secondary air intake
17 Check valve
18 Hot air generator
19 Manual valve
20 Automatic valve
21 Optotube
22 Foreign material removal device
23 Connection fitting
24 connection hose

Claims (3)

  A fly ash storage tank that stores fly ash that has been transported from the incinerator by a conveyor, a solidifying agent storage tank that stores the solidifying agent, and a fly ash and a solidifying agent that are provided at the outlets of the two tanks, respectively. The first and second constant quantity feeders, the kneader supplied with the fly ash from each of the quantitative quantity feeders, the solidifying agent, and the chemical liquid from the chemical liquid storage tank, and the kneading treatment from the kneader. In the fly ash treatment facility in which the kneaded material generates a landfill treatment product via the curing conveyor, the fly ash treatment facility is added with a vacuum facility for loading the fly ash as dry ash to the vacuum vehicle, The vacuum facility includes a stable extraction device comprising a twin screw feeder provided between a fly ash storage tank in the fly ash treatment facility and a first metering feeder, and fly ash discharged from the stable extraction device. Provided for stable transport A stabilizer, a fixed quantity feeder that mixes the fly ash that has passed through the stabilizer with the secondary air required for vacuum transportation, and operates pneumatic transportation in accordance with the capacity of the vacuum vehicle, and a fly ash provided in the middle of the vacuum pipe An incineration fly ash loading system comprising a foreign matter removing device for removing foreign matter inside and a connection joint for connecting to a connection hose on the vacuum vehicle side.   2. The incineration fly ash loading system according to claim 1, wherein hot air from a hot air generator is blown into a vacuum pipe at a front stage of the fixed amount feeder through a manual valve.   In the incineration fly ash loading system according to claim 1, a vacuum tube is provided in the vacuum pipe so as to visually check the state of the package.

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