JP2001317007A - Asphalt concrete manufacturing facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an asphalt concrete manufacturing facility, in which a deodorizer is atomized at each place, where a bad odor is dispersed, the bad odor is extinguished and environment can be conserved. SOLUTION: In the asphalt concrete manufacturing facility, in which asphalt concrete is manufactured from only new timber or waste timber and new timber, a deodorizing unit 8 removing the bad odor is arranged at a site, where the asphalt concrete is exposed to the outside air, and the dispersion of the bad odor is suppressed by deodorization by the deodorizing unit 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production facility for producing asphalt mixture from asphalt pavement waste material (hereinafter referred to as "waste material") and new material, and in particular, to remove environmental odor generated from a waste material dryer. The present invention relates to asphalt mixture production equipment adapted to

[0002]

2. Description of the Related Art Asphalt production facilities have conventionally produced asphalt composites in which waste materials are reused in addition to production from new aggregates. A waste material dryer and a new material dryer for heating by a burner are installed in the asphalt mixture production equipment, and the waste material and the new material are heated and recovered as solids.

In the operation of a new material dryer, dust is generated because only new material is heated. On the other hand, when a waste material to which asphalt is attached is heated by a waste material dryer, blue smoke is generated. This blue smoke is an oily component having a bad smell, and if discharged as exhaust gas from the flue, it has a bad influence on the surrounding environment. In addition, with regard to the new material dryer, the odor of unburned gas generated when the burner is ignited and extinguished is generated, and the effect on the environment cannot be ignored.

Conventionally, odors generated in such asphalt mixture manufacturing equipment have been dealt with by providing a shielding wall around the plant or the plant body. That is, the odor emitted from the asphalt mixture material is blocked by the shielding wall so as not to leak outside, thereby preventing the odor from being diffused.

[0005]

However, in an asphalt mixture manufacturing facility, the material is not processed only in a closed container, but is taken out of the container or transferred to another container or the like. Or For this reason, the periphery of the plant or the whole body cannot be completely sealed by the shielding wall, and the occurrence of odor leakage is inevitable. Also,
Even with complete barriers, it is not possible to provide airtightness when transporting materials or at places where manufactured mixed materials are loaded into transport trucks.

[0006] As described above, although the conventional asphalt mixture production equipment is provided with a shielding wall, it is not possible to suppress the leakage of odors from various parts of the equipment, leading to environmental degradation around the plant.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an asphalt mixture production facility capable of extinguishing an odor by spraying a deodorant to various places where the odor is radiated, thereby preserving the environment.

[0008]

SUMMARY OF THE INVENTION The present invention relates to an asphalt mixture production facility for producing an asphalt mixture from only a new material or a waste material and a new material. A deodorizing unit for removal is arranged.

According to the present invention, since the odor from the portion where the asphalt mixture is exposed to the outside air is deodorized by the deodorizing unit, the emission of the odor can be suppressed as compared with the case where a shielding wall or the like is provided, and the environmental deterioration can be prevented. Can be.

In the present invention, the deodorizing unit comprises:
The apparatus may include a plurality of nozzles for spraying a deodorizing liquid containing deodorizing bacteria toward the site.

In such a configuration, the odor of the asphalt mixture can be removed by spraying a deodorizing solution containing deodorizing bacteria from a plurality of nozzles.

The deodorizing unit may include a sensor for detecting an odor and a wind pressure, and detect a wind direction by detecting the wind pressure, and spray the deodorizing liquid only from the nozzle disposed on the lee side of the portion. Good.

In such a configuration, since the spray from the nozzle flows in the leeward direction, the asphalt mixture is not wetted with the deodorizing liquid, and the temperature of these materials and new materials can be prevented from lowering.

Further, the deodorizing unit may be configured to control a supply amount or a supply time of the deodorizing liquid substantially in proportion to a magnitude of odor detection by the sensor.

With such a configuration, the degree of deodorization can be increased according to the magnitude of the odor of the material from the waste material or the new material, and the emission of the odor can be suppressed more reliably.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of an asphalt mixture production facility in one embodiment of the present invention.

In FIG. 1, a waste material skip elevator 3 is disposed between a waste material dryer 1 and a surge bin 2, and an asphalt plant main body 4 is installed beside the surge bin 2. A horizontal trolley 5 is disposed below the asphalt plant main body 4, and a composite silo 7 having a skip elevator 6 is disposed on the right side.

The material fed from the waste material dryer 1 is charged into a bucket 3a provided in the waste material skip elevator 3, and when the bucket 3a rises up the waste material skip elevator 3 and reaches just above the surge bin 2, the bucket 3a
Is charged into the surge bin 2. A transport trolley 2a that moves in the horizontal direction is disposed below the surge bin 2, and the material stored in the transport trolley 2a is loaded into the asphalt plant main body 4 from a chute 4a provided in the asphalt plant main body 4 and processed. . And
The processed mixture is conveyed to the skip elevator 6 side by the horizontal trolley 5, and is fed out to the bucket 6a which moves up and down the skip elevator 6. When the bucket 6a rises up the skip elevator 6 and reaches just above the mixture silo 7, the mixture is loaded into the mixture silo 7 by inverting the bucket 6a up and down. The mixture in the mixture silo 7 is cut out into a truck T waiting below.

In the above-mentioned equipment, when the material from the waste material dryer 1 or the mixture from the asphalt plant main body 4 is exposed to the external environment and the odor is easily diffused, it is as follows. (1) When charging the material from the waste material dryer 1 into the bucket 3a. (2) When charging a material into the surge bin 2 from the bucket 3a. (3) When charging a material from the surge bin 2 into the asphalt plant body 4. (4) When the mixture is charged from the asphalt plant main body 4 into the horizontal trolley 5. (5) When the mixture is charged from the horizontal trolley 5 into the bucket 6a. (6) When the mixture is charged from the bucket 6a into the mixture silo 7. (7) When loading a mixture from the mixture silo 7 to the truck T.

As described above, when viewed from the entire equipment, odors are radiated from the materials and the mixture mainly at a total of seven locations. Therefore, in the present invention, a deodorizing unit 8 for deodorizing is provided in each of these places. In other words, as shown by a chain line in FIG. Deodorizing units 8 are arranged above, above the bucket 6a, upper and lower ends of the composite silo 7, and above the truck T, respectively.

FIG. 2 is a schematic view showing the structure of the deodorizing unit 8, which is attached to a bucket 3a into which the material is charged from the waste material dryer 1.

The deodorizing unit 8 includes a tank 8a for storing the deodorizing liquid and a pump 8 for pumping the deodorizing liquid from the tank 8a.
b, a plurality of nozzles 8c connected to the flow path from the pump 8b and arranged around the upper part of the bucket 3a;
b and a solenoid on-off valve 8d arranged between the nozzle 8c. The drive of each of the pump 8b and the electromagnetic on-off valve 8d is controlled by the controller 8e. This drive control is based on the input of signals from a plurality of sensor units 8f (only one is shown for simplicity of explanation in the example of the figure) arranged above the bucket 3a. That is, the sensor unit 8f includes an odor detection unit that detects an odor and a wind pressure detection unit that detects a wind pressure. By including a plurality of sensor units 8f, the intensity and the wind pressure of the odor are measured, and a signal is generated. Input to the controller 8e.

FIG. 3 is a schematic plan view showing an arrangement example of the nozzle 8c and the sensor unit 8f with respect to the bucket 3a.

As shown in the figure, four sensor units 8f are arranged corresponding to the respective center portions of the four sides of the outer periphery of the bucket 3a, and a plurality of nozzles 8c are arranged so as to surround the periphery of the bucket 3a. Are arranged. The four sensor units 8f input the wind pressures at four locations around the bucket 3a to the controller 8e by the wind pressure detection unit,
The difference in wind pressure at each position is calculated to detect the wind direction. Then, the deodorizing liquid is sprayed from the plurality of nozzles 8c downstream of the bucket 3a with respect to the detected wind direction, and the odor flowing in the leeward direction is deodorized.

The configuration of the deodorizing unit 8 is the same in other parts, and deodorizes odors from waste materials and mixed materials. The deodorizing liquid stored in the tank 8a is a bacterial liquid obtained by diluting a bacterium of the genus Thiobalus or Hyphomicrobium with an appropriate solvent such as water. Bacteria of the genus exemplified are known to convert odor components to odorless substances by biochemical reactions. That is, when bacteria come into contact with odor components, the bacteria take odor components into the body and oxidize carbon, hydrogen, nitrogen, and sulfur, which are the components of the odor components, to produce carbon dioxide, water, sulfate ions, and nitrate ions. Can be converted to odors.

In the above configuration, the bucket 3a is
As shown in (1), when located at the lower end of the waste material skip elevator 3, the asphalt material dried from the waste material dryer 1 is charged into the bucket 3a. During the period from the charging of the material from the waste material dryer 1 to the completion thereof, the deodorizing unit 8
The sensor unit 8f detects the wind pressure and the odor and inputs the signal to the controller 8e. The wind pressure detectors of the four sensor units 8f detect the wind pressure and simultaneously calculate the difference between the detected wind pressures of the sensor units 8f to specify the wind direction. That is, by detecting the wind pressure at a plurality of positions, the direction in which the air flow is flowing can be known from the difference in the detected wind pressure by each sensor unit 8f. Then, for example, when the wind direction in the arrow direction is detected in FIG.
The electromagnetic opening / closing valve 8d for each of the nozzles 8c is opened and the pump 8b is operated. Thereby, the deodorizing liquid is supplied from the tank 8a and sprayed from the nozzle 8c, and
The odor component of the air flowing away from the can be removed.
Further, when the wind direction changes, the wind pressure detecting section of the sensor unit 8f detects this, and the deodorizing liquid is similarly sprayed from the nozzle 8c located downstream of the bucket 3a.

As described above, by specifying the wind direction by the wind pressure detecting section of the sensor unit 8f, the deodorizing liquid is always sprayed from the nozzles 8c arranged on the downstream side of the bucket 3a, so that the emission of odor can be prevented. Also, the bucket 3a
Since the deodorizing liquid is not sprayed from the nozzles 8c arranged on the upstream side in the wind direction, the material is not wet with the spray liquid, and the temperature of the material is prevented from lowering.

Here, the degree of the generated odor is various, and includes those having a very strong odor to those having a slight odor. In contrast, the controller 8e
Thus, optimal control can be executed. That is, when the odor is strong, timer control such as increasing the rotation speed of the pump 8b to increase the flow rate of the deodorizing liquid to enhance the deodorizing effect, or increasing the spraying time when the flow rate can be set only to a constant value, is performed. Do. If the odor is weak, the reverse operation may be performed.

As described above, when the material is charged into the bucket 3a, deodorization is performed by the deodorizing unit 8, and the odor from the material can be deodorized with the deodorizing liquid utilizing bacteria. Thereafter, the bucket 3a moves up the waste material skip elevator 3, and the odor can be prevented from being emitted by covering the bucket 3a or disposing the deodorizing unit 8 along the waste material skip elevator 3.

In other parts, the deodorizing unit 8 operates in the same manner as above, and in the part where the material or the mixture comes into contact with the outside air, the deodorizing unit 8 is deodorized by spraying the deodorizing agent from the nozzle 8c on the downstream side of the apparatus with respect to the wind direction. You. Therefore, the deodorizing liquid can be used to remove the odor at a portion where the material or the mixture is likely to come into contact with the outside air and generate an odor, so that the effect on the environment can be suppressed as compared with the conventional case where only a shielding wall is used.

[0031]

According to the present invention, a deodorizing unit is provided at a portion where an asphalt mixture produced from a new material or a waste material and a new material is exposed to the outside air, so that the source of the odor can be quickly deodorized and deodorized. As compared with the case of using a shielding wall, the emission of odor can be suppressed remarkably, and the influence on the environment can be remarkably reduced.

[Brief description of the drawings]

FIG. 1 is a schematic view of an asphalt mixture production facility showing an embodiment of the present invention.

FIG. 2 is a schematic diagram of a deodorizing unit according to the embodiment of the present invention.

FIG. 3 is a schematic plan view showing a spray distribution of a deodorizing liquid from a nozzle to a bucket.

[Explanation of symbols]

 Reference Signs List 1 waste material dryer 2 surge bin 2a transport trolley 3 waste material skip elevator 3a bucket 4 asphalt plant main body 4a chute 5 horizontal trolley 6 skip elevator 6a bucket 7 mixture silo 8 deodorizing unit 8a tank 8b pump 8c nozzle 8d solenoid valve 8e controller 8e controller 8e

Claims (4)

[Claims] 1. An asphalt mixture production facility for producing an asphalt mixture from only a new material or a waste material and a new material, wherein a deodorizing unit for removing an odor is disposed at a portion where the asphalt mixture is exposed to the outside air. Asphalt mixture production equipment characterized by the following. 2. The asphalt mixture manufacturing equipment according to claim 1, wherein the deodorizing unit includes a plurality of nozzles for spraying a deodorizing solution containing deodorizing bacteria toward the site. 3. The deodorizing unit includes a sensor for detecting an odor and a wind pressure, and detects a wind direction by detecting the wind pressure, and sprays a deodorizing liquid only from the nozzle disposed on the lee side of the portion. The asphalt mixture production equipment according to claim 2, characterized in that: 4. The asphalt mixture according to claim 3, wherein said deodorizing unit is configured to control a supply amount or a supply time of said deodorizing liquid substantially in proportion to a magnitude of odor detection by said sensor. Material production equipment.