JPS63297495A - Counter current-cocurrent dual use type dryer - Google Patents

Abstract

PURPOSE:To provide the titled dryer dually usable for asphalt plant for new aggregates and for recycle plant for waste aggregates, designed to make changeover between dryer burner, changeover dumper and changeover chute. CONSTITUTION:When operating as an asphalt plant using new aggregates a, the dryer 5 is heated using a burner 7 at the rear of said dryer 5; a duct 12 is closed through a changeover dumper 13, and the new aggregates dried in the dryer 5 is fed, through a changeover chute 20, to an asphalt-specific plant B. On the other hand, when operating as a recycle plant using waste aggregates b, the dryer 5 is heated using a burner 6 at the front of said dryer; a duct 11 is closed through the changeover dumper 13, and the waste aggregates b dried in the dryer 5 is fed, through the changeover chute 20, to a recycle-specific plant C.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an asphalt plant using new aggregate,
The present invention relates to a dual-purpose heating dryer for a recycling plant that uses seat aggregates such as pavement waste material (hereinafter simply referred to as seat aggregates).

[Conventional technology]

Conventionally, an asphalt plant that uses new aggregate and a recycling plant that recycles seat aggregate have been structured separately.

Such asphalt plants and recycling plants are shown in FIGS. 2 and 3.

Figure 2 shows an asphalt plant, which consists of an aggregate storage tank 3, a feeding belt conveyor 4, a dryer 5, a burner 7, a hot elevator 22, a vibrating screen 23
, mixer 25, stone powder silo 26, stone powder elevator 27,
29 asphalt tanks, 8 heavy oil tanks, 1 cyclone
5, bag filter 16, silencer 18, exhaust fan 17,
and chimneys 19 etc. are arranged in a systematic manner.

In addition, Figure 3 shows a recycling plant.
The plant consists of a sitting aggregate supply bin 42, an input belt conveyor 4, a burner 6, a dryer 5, a charge hopper 43, a skip 32, a surge bin 33, a heavy oil tank 8, a cyclone 15, a bag filter 16, an exhaust fan 17, and a silencer 1.
8, chimney 19, etc. are arranged in a systematic manner.

[Problem that the invention seeks to solve]

However, the conventional asphalt plants and recycling plants mentioned above are structured separately and systematically, so
When using new materials and waste aggregates, two types of plants must be installed side by side, and the number of equipment, site, operators, etc. are twice as many as in the case of a single asphalt plant or recycling plant. There was a problem.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an asphalt mixture manufacturing apparatus that doubles as a dryer and an exhaust gas treatment device that is attached to the dryer.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is provided with a cold aggregate storage section and a cold aggregate transport section, in which waste aggregates such as paving roadbed waste materials are disposed before and after a dryer for heating and drying cold aggregates. A cold aggregate heating section consisting of a heating burner and a Neuner for heating new material is provided, a duct for each burner is installed in this heating section, these ducts are connected, and a switching damper is installed at this joint. , an exhaust gas purification device is installed at the rear of the switching damper, a switching chute is provided at the heated aggregate discharge section of the dryer, and an asphalt-only plant and a recycling-only plant are branched from the switching chute. do.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

Note that the same parts as those in the conventional example are given the same reference numerals, and the description thereof will be omitted.

FIG. 1 shows a dryer that has both an asphalt plant and a recycling plant. That is, the equipment up to the switching chute 20 belongs to both the asphalt plant and the recycling plant, and the equipment after the switching chute 20 is divided into individual systems of each plant.

3 is a cold aggregate storage tank, in which fresh material (a) and waste aggregate (b) are stored.
) can be stored. Reference numeral 4 denotes an input belt conveyor for conveying new pre-material (a) and/or waste aggregate, etc.) into the dryer 5. A burner 6 for heating waste aggregate is installed at the front of the dryer 5, and a burner 7 for heating new pre-material is installed at the rear.Both burners 6 and 7 are supplied with fuel from a heavy oil tank 8. Piping is done. 9.10 is a gear pump.

Ducts 11 and 12 are installed from the front and rear of the dryer 5, and both ducts 11 and 12 are switching dampers 130.
The parts are joined together and connected to the duct 14. Duct 1
The devices after 4 are dust collectors equipped with an exhaust gas purification device.

15 is a cyclone, and the dryer 5 is used to dry the new material (a) and/or
Gas containing dust, which is generated when waste aggregates or waste aggregates are heated and dried, is separated into large-sized particles and exhaust gas containing fine particles. 16 is a bag filter, and the exhaust gas is purified here. 17 is an exhaust fan, 18 is an exhaust fan 1
The purified exhaust gas is discharged into the atmosphere by the exhaust fan 17 via the silencer 18 and the chimney 19.

On the other hand, from the rear of the dryer 5, a path is connected to a switching chute 20 for moving new material (a) and/or waste aggregate, etc., and from the switching chute 20 to an asphalt-only plant B and a recycling-only plant C. Branched out.

A hot elevator 22 transports the new material (a) heated and dried by the dryer 5 upward, and feeds it into the vibrating sieve 23. The fresh material (a) is classified into particle sizes by the vibrating sieve 23 and supplied to the measuring tank 24 below.

A mixer 25 is arranged below the measuring tank 24.

A stone powder silo 26 stores stone powder. The stone powder is transported by a stone powder elevator 27 and fed into the mixer 25 via a stone powder measuring tank 28. Further, 29 is an asphalt tank, and the mixer 2 is connected to this tank 29.
5 hairsfards are supplied.

The mixer 25 mixes the new material <a), stone powder, and asphalt, and loads the truck 30 hairsphard mixture from the bottom thereof.

On the other hand, the single recycling plant C is branched off from the switching system 20 as described above. 31 is a skip packet, and 32 is a skip. Skip packet 31
The waste aggregate (b) loaded in is transported to a surge bin 33 by a skip 32. The recycled seat aggregate (b) stored here is supplied to the mixer 25 described above.

The dual-purpose dryer according to the embodiment of the present invention is configured as described above, and when operating as an asphalt plant using the new preform material (a), the new preform material heating burner 7 at the rear of the dryer 5 is used. is used to heat the dryer 5, the duct 12 is closed by the switching damper 13, and the new preform material (a) heated and dried in the dryer 5 is sent to the asphalt-only plant B by the switching chute 20.

On the other hand, when operating as a recycling plant using waste aggregate (b), the dryer 5 is heated using the waste aggregate heating burner 6 at the front of the dryer 5, and the switching damper 13
The duct 11 is closed by the switching chute 20.
Waste aggregate heated and dried by dryer 5 (b)
is sent to recycling plant C.

〔Effect of the invention〕

As explained above, in the present invention, by switching the dryer burner, switching damper, and switching chute, the plant can be operated as an asphalt plant or a recycling plant. This allows a single dryer to heat both new material and waste aggregate. Further, the dust collector and the exhaust gas device can be used for both an asphalt plant and a recycling plant. Additionally, since it can also be used as a dryer, residual heat can be used effectively. The installation area of the plant is a little more than that of one asphalt plant, and equipment costs and power consumption are also reduced. These improve the effective operating rate of the plant.

[Brief explanation of drawings]

FIG. 1 is a system diagram of an embodiment of the present invention, FIG. 2 is a system diagram of a conventional asphalt plant, and FIG. 3 is a system diagram of a conventional recycling plant. B Niasfald stand-alone plant C: Recycling stand-alone plant (a): New material et al.): Waste aggregate 3: Cold aggregate storage tank 4: Input belt conveyor 5: Dryer
6: Burner for heating waste aggregate 7; Burner for heating new aggregate 8: Heavy oil tank 9.10: Gear pump 11.1
2: Duct 13: Switching damper 14; Duct
15: Cyclone 16: Bag filter
17: Exhaust fan 18: Silencer 19: Chimney 20: Switching chute 22: Hot elevator 23
: Vibrating sieve 24: Measuring tank 25: Mixer
26 Two stone powder silos 27: Stone powder elevator 28
: Stone powder measuring tank 29: Electrically heated asphalt tank 30/truck 31: Skip packet 32
:Skip 33: Surgibin patent applicant
Nichi-Chinese Iron Works Co., Ltd. Representative Masu Kobori (and 2 others) 'jAI Figure 3 Exit

Claims (1)

[Claims] 1. Equipped with a cold aggregate storage section and a cold aggregate transport section, and a burner for heating waste aggregate such as paving roadbed waste material and a burner for heating new material, respectively, before and after the dryer that heats and dries the cold aggregate. A cold aggregate heating section is provided, a duct for each burner is installed in this heating section, these ducts are connected, a switching damper is provided at this connection section, and an exhaust gas purification device is installed at the rear of the switching damper. A counter-current/co-current dryer, characterized in that a switching chute is installed in the heated aggregate discharge section of the dryer, and an asphalt-only plant and a recycling-only plant are branched from the switching chute.