JPH09196560A - Jet burner type dryer and grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the clogging of a filter and take out a product with desired properties which is obtained under a process in a drier and grinder for a processed material by using the jet gas of a jet burner. SOLUTION: A trap 17 and an exhaust pipe 21c having a branch valve 21 through a filter 19 are connected to the exhaust port 15 of a processing vessel 1 having a jet burner 2. A temperature detecting means 22 is provided in the exhaust port 15. A measuring means 3c of the quantity of supplied compressed air is provided in a pipeline 3a for feeding compressed air 3. The compressed air is jetted through a solenoid valve 24 from the secondary side of the filter 19 depending on the quantity of compressed air and temperature sent to a controller 23 and a filter adhesive material is shaken off, so that a passage of air can be normally maintained in the device, the quantity of supply of a processed material is controlled from the value of the temperature detecting means 22 and the processed material can be preheated. As a result, the clogging of the processed material from its supply to it discharge, the safe operation of the device can be continued and the stable recovery of the product can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating an object to be treated with a jet burner and drying and pulverizing it by utilizing a jet gas of ultra-high speed and high temperature which a jet burner has. The present invention relates to a device that makes it possible to take out a subsequent object to be processed as a product having desired properties.

[0002]

2. Description of the Related Art As a conventionally known dry crushing apparatus using a jet burner, there is an apparatus shown in FIG. Of these, the portion for drying and pulverizing the treated material is the treatment tank (1) having a closed structure, and as shown in FIG. 2, a jet burner (2) is installed on the upper portion of the treatment tank to use compressed air (3) and fuel. Kerosene (4) is injected into a cylindrical burner body (2a) which has an inner wall (5) and an outer wall (6) and has a passage (7) for cooling water CW between both walls to ignite and burn, The burned gas body (8) is ejected as a flame jet flow from the ejection port (9) in the lower part of the burner body. The ejected gas has a high temperature energy of 1900 to 2000 ° C and a flow velocity of Mach 3 to 4. As an example of this jet burner, there is JP-A-55-79919.

On the side wall of the processing tank, a processing material supply means (11) for supplying the processing material (10) into the tank is provided at a position where the processing material collides with the jetted gas in the tank and scatters.

When the treated material is supplied into the treatment tank by the treated material supply means and directly exposed to the ultra-high temperature gas body jetted from the jet burner, the treated material is instantly dehydrated and dried, and the gas body is discharged. Is separated from the surface of the processed object supplied by the kinetic energy of the object to become the object to be processed, and is scattered along the agitation flow of the gas body formed by the jet flow and the flow along the side wall of the process tank. Fly around. Further, the object to be treated is crushed by repeating collision with the side wall of the tank and mutual collision during the flight to be a product (12), while the gas body deprives energy of dehydration, drying and crushing to exhaust gas body. (13)
Then, the mixed gas body (14) in which the products are mixed is discharged from the discharge port (15) at the upper part of the processing tank to the outside of the tank.

As shown in FIG. 3 and FIG. 4, the device for drying and crushing has a cyclone (17) at the discharge port of the processing tank.
And a collector part (20) provided with a filter (19) are connected to each other, and first, a product is separated from an exhaust gas body by a cyclone, and the product is collected and collected from a cyclone recovery port (17a) at a lower part. Furthermore, the mixed gas body that mixed fine powdery products that could not be separated by the cyclone is separated into the product and the exhaust gas body by the next filter, the product is recovered from the filter recovery port (19a), and the exhaust gas body is the atmospheric air. Is released to.

[0006] In the above-mentioned treatment for recovering the object to be treated as a product, it is important not to return the moisture in the exhaust gas body to the product discharged from the treatment tank. this is,
Not only is the product recovered in a dehydrated, dried, and crushed state, but it also prevents the product from containing water and causing clogging of the filter and impairing the flow of mixed gas in the equipment. The temperature of the product discharged from the tank and the exhaust gas body is within a predetermined range, that is, 100 ° C which is the temperature to prevent condensate.
In order to maintain the above, the supply amount of the processed material is adjusted to maintain the temperature at the discharge port of the processing tank within a predetermined range. An example of the above is Japanese Patent Laid-Open No. 53-7866.

[0007]

As described above, in the prior art, in order to prevent condensate water, the temperature of the mixed gas body is maintained within a predetermined range by adjusting the amount of processed material supplied.

However, the temperature of the mixed gas body discharged from the processing tank is related to not only the supply amount of the processed material but also the amount of gas ejected from the jet burner. For example, with respect to the temperature rise of the discharge port due to the large amount of ejected gas, even if only the amount of the processed material supplied is increased, it only hinders the formation of the flow of the gas body along the side wall of the processing tank. As a result, the object to be treated is not sufficiently stirred, and the discharged object to be treated becomes inhomogeneous in both drying and crushing, which adversely affects the separation of cyclones and causes clogging in the filter section. In this filter part, there is adherence of filtered material even in the normal state,
It is necessary to remove the adhered substances, but if the above-mentioned clogging occurs in addition to the normal adhesion, the flow of the mixed gas body in the equipment is deteriorated, and the discharge of the object to be treated and the exhaust gas body from the treatment tank is deteriorated. , The condensate phenomenon of water in the exhaust gas is caused, and the filter is clogged with the condensed water and the product that is moistened by the water, which reduces the exhaust efficiency and reduces the flow velocity of the exhaust gas in the cyclone. Which adversely affects the separation efficiency, which has also been a vicious cycle of further increasing the clogging of the filter.

As described above, it is difficult to perform stable operation only by adjusting the amount of the processed material supplied in the conventional apparatus, stable operation is difficult, and the recovered product cannot be recycled for use because of inhomogeneous properties. .

Further, in order to prevent the condensate phenomenon, the piping and the collector part are covered with a heat insulating material, but in this case, the installation space of the device becomes large, which is not preferable from the economical viewpoint. .

On the other hand, the exhaust gas body filtered by the filter still retains thermal energy, and discharging it as it is is a loss from the standpoint of thermal efficiency, and also causes a problem of warming the atmosphere around the discharge part. there were.

It is an object of the present invention to provide a jet burner type dry pulverizing apparatus provided with means for stably recovering the product properties in a desired state.

Another object of the present invention is to provide a jet burner type dry crushing device which saves energy by utilizing the thermal energy of exhaust gas.

[0014]

In order to achieve the above-mentioned object, the present invention is characterized by a treatment tank equipped with a jet burner, a treatment material supply means for supplying a treatment material to the treatment tank, and a jet burner. From the processing tank, which discharges the mixed gas body that is a mixture of the object to be dried and pulverized with the gas body ejected from and the gas body that became exhaust gas due to the treatment, and the discharged product and the exhaust gas body are separated In a dry pulverizer equipped with a collector section, gas measuring means for measuring the amount of compressed air supplied to the jet burner, temperature detecting means for detecting the temperature of the mixed gas body, and impact of air pressure on the filter of the collector section. A shock is generated from the supplying means, the supply amount adjusting means for adjusting the supply amount of the processed material of the processing material supplying means, the supply amount of the compressed air obtained from the gas measuring means and the temperature obtained from the temperature detecting means. Those having a control unit for controlling the stage and supply amount adjusting means.

Another feature of the present invention is that, in the above-mentioned drying and pulverizing apparatus, preheating means for preheating the processed material to be supplied to the processing tank and the exhaust gas body are sent to the preheating means by a command from the control means. It is provided with a branch valve.

Next, the above means will be described. The amount of gas ejected from the jet burner and the temperature at which the mixed gas of the object to be treated and the exhaust gas are discharged from the treatment tank are important factors that affect the properties of the product collected in the collector part. It is also an important factor for stable and continuous normal operation of this dry pulverizer. That is, when the temperature is higher than a predetermined temperature, the processed product stays in the processing tank for a predetermined processing time or longer, or the supplied amount of the processed product is too small to be in an overheated state, or the filter is clogged to cause a mixed gas mixture. Indicates that the product is difficult to be discharged from the processing tank. As a result, the product may deteriorate such as carbonization and the filter may be damaged. vice versa,
When the temperature is lower than the predetermined temperature, the filter is likely to be clogged due to the condensed water, and the properties of the recovered product are non-uniform.

In the present invention, the amount of compressed air supplied per unit time is related to the amount of the gas body ejected from the jet burner, and the amount of the gas body ejected, the temperature of the workpiece to be supplied, the water content and the amount supplied are determined. Based on the relationship, the temperature of the mixed gas when exhausted from the processing tank is determined, and paying attention to the fact that these are factors that affect the operation of the equipment and the products to be collected, the amount of compressed air supplied per unit time. And a means for detecting the integrated amount and the temperature of the mixed gas body are provided, the detected value is given to the control means, and when the integrated amount of compressed air exceeds the amount given in advance, it is long even in a normal operating state. During operation time, the fine powder adhering to the filter is impacted by air pressure from the secondary side of the filter and shaken off to maintain the normal flow of the mixed gas body in this device at all times, and then adjust the supply amount of the processed material. Mixed It became capable of recovering the product on desired properties while maintaining the temperature of the scan body within a predetermined value. The fine powder shaken off from the filter is collected from the collection port.

Further, it is possible to preheat the processed material. This is because in order for the supplied processed product to be dehydrated and dried, the water contained in the processed product deprives the latent heat and sensible heat from the energy provided by the jit burner to become steam at a predetermined temperature. A preheating means for utilizing the residual heat energy of the body to preheat the processed material before being supplied to the processing tank was provided in the processed material supply means to enhance the sensible heat and improve the thermal efficiency. This has a great effect of eliminating energy, especially for a processed product in a frozen state.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The dry crushing apparatus 28 of the present invention will be described below.
One embodiment will be described with reference to FIG. Jet burner 2
At the outlet 15 of the treatment tank 1 equipped with the bag filter 1 through the pipe 16 and the gravity type collector 17 and the pipe 18.
The separating means 20 provided with 9 is connected, the branch valve 21 is installed at the outlet for discharging the exhaust gas body 13 from the separating means 20, and the exhaust pipe 21c is connected. In this embodiment, a cyclone is used as the gravity type collector 17.

The mixed gas body 14 passing through the discharge port 15
A means 22 for detecting the temperature of is installed. Further, the pipe 3a for sending the compressed air 3 to the jet burner 2 is provided with gas measuring means 3c for measuring the amount of compressed air supplied to the jet burner 2, and the control valve 25, the cushion tank 26, and the cushion tank 26 via the branch pipe 3b. A solenoid valve 24 is provided.

The broken line in FIG. 1 indicates the wiring, and the controller 23
And that the gas metering means 3c, the temperature detecting means 22, the motor 11a for driving the processed material supply means 11, the opening / closing motor 21a for adjusting the opening / closing amount of the branch valve 21, and the solenoid valve 24 are connected. The branch valve 21 is a pipe 21.
It connects with the preheating means 27 via b, and enables preheating of the processed material 10 supplied by the branched exhaust gas body 13.

Next, the processed material 10 to be processed by the present apparatus 28 is put into the hopper 11b provided at the upper part of the processed material supply means 11, and is supplied from the bottom of the hopper 11b to the processing tank 2. . In the present embodiment, a screw conveyor is used as the processed material supply means 11, but this device 28
Considering that many of the treated products 10 treated in 1. have a high water content, any means that does not hinder the supply to the treatment tank may be used, and a bladeless pump may be used. The supply amount of the processed material 10 is the drive motor 11 according to a command from the control device 23.
It is controlled by the rotation speed of a, and the tip of the processed material supply means 11 is
The supplied processing object 10 is in a position where it hits the gas body 8 ejected in the processing tank 2, that is, a position where it is directly exposed.

When the supplied processed material 10 hits the jetted gas body 8 having high temperature energy at an ultra high speed, the surface is dehydrated in an instant, and the difference in properties between the surface and the portion not yet dehydrated and the ultra high speed. The dehydrated and dried part is peeled off by the kinetic energy of the gas body, and the part appearing on the surface is also separated and scattered in an instant. By repeating this, the treated product 10 is dehydrated and dried to be a treated substance, and the ejected gas body 8 becomes an exhaust gas body 13 containing water contained in the treated product 10 as water vapor.

Further, the jetted gas body 8 dehydrates and drys the object to be processed 10, but the object to be processed is caused to fly in the processing tank 1 by the kinetic energy which it still has, and the collision and the flight with the inner wall of the processing tank 1 are caused. The processed objects 10 repeatedly collide with each other, and the object to be processed becomes a powdery product 12, the jetted gas body 8 is deprived of heat and kinetic energy to become an exhaust gas body 13, and a mixed gas body containing the product 12. 14 is extruded from the discharge port 15, passes through the pipe 16, enters the gravity type collector 17 of the separating means 20, and most of the product 12 is recovered, and further contains the powdered product 12. The mixed gas body 14 is a pipe 18
It is separated and collected by the bag filter 19 after passing through.

In the present device 28, in order to maintain normal operation, the product attached to the bag filter 19 is shaken off by the impact of pneumatic pressure. Therefore, of the physical quantity input to the processing tank 1, the amount of compressed air 3 supplied to the jet burner 2 by the gas measuring means 3c is detected, and the mixed gas body discharged as an indication of the operating state of the processing tank 1. The temperature of 14 is detected by the temperature detecting means 22, the solenoid valve 24 and the pipe 19a are connected to the secondary side of the bag filter 19,
When the integrated supply amount of the compressed air 3 detected by the gas metering means 3c reaches a predetermined value, the solenoid valve 24 is opened by a command from the control device 23, and the air of about 2 atm from the cushion tank 26 is used as a filter. Spray from the next side to give an impact to the bag filter 19, shake off the adhered powdered product 12, keep the street from the processing tank 1 to the exhaust pipe 21c always normal, collect the product 12 efficiently, It enables stable and continuous normal operation. When the amount of compressed air 3 supplied per unit time does not fluctuate, the solenoid valve 24 may be opened and closed periodically.

As described above, first, the processing tank 1 to the exhaust pipe 2
After processing up to 1c in a normal state without clogging, treat 10
Adjust the supply of.

Next, the supply of the processed material 10 will be described.
After the operation of the jet burner 2 in the processing tank 1 is started, the temperature of the outlet 15 is detected by the temperature detection means 22 for a while, and the motor 1 that drives the processed material supply means 11 from the detected value.
The processed material 10 is supplied while controlling the rotation speed of 1a. When the supply is further continued, the temperature of the discharge port 15 changes, but the motor 11 is detected by the temperature detecting means 22.
Since the rotational speed of a can be controlled and the amount of the processed material supplied can be adjusted to match the amount of the ejected gas, the operation can be continued in a stable state, and the product 12 can also obtain a desired normal product. be able to.

Next, preheating of the processing object 10 to be supplied will be described. Exhaust gas body 13 that has passed through a normal filter 19
Still has thermal energy, and exhaust pipe 2
It would be a loss to discharge it from the 1c to the atmosphere.
Raises the temperature inside the building where the is installed and deteriorates the work environment.
In addition, since many of the processed materials 10 have a high water content, the kinetic energy and thermal energy of the high-speed and high-temperature gas flow of the jetted gas body 8 are consumed for dehydration, and in particular, the water content becomes steam at a predetermined temperature. In order to remove sensible heat and latent heat from the ejected gas body 8,
Treated material 10 with the residual heat energy of exhaust gas body 13
Pre-heating the slag to reduce the sensible heat required for dehydration effectively uses the kinetic energy and thermal energy of the jetted gas body 8 for dehydration / drying and pulverization. Therefore, a branch valve 21 is installed at the outlet of the exhaust gas body 13 of the separating means 20, is connected to the preheating means 27 via the pipe 21b, and the branch valve 21 is opened / closed according to a command from the control device 23 to be supplied. It is possible to preheat.

[0029]

According to the present invention, the amount of compressed air supplied and the temperature of the mixed gas body are detected, and from the elapse of the operating time and the fluctuation of the temperature, from the supply to the discharge of the processed material of this device. In addition to maintaining normal operation without clogging, it was possible to continuously operate stably by controlling the supply amount of the processed material and to stably recover the product with desired properties.

Further, since the residual heat energy of the discharged gas body can be used for preheating by using it to raise the temperature of the processed material, the energy of the jetted gas body can be effectively used for dehydration / drying and pulverization. I was able to plan. In particular, it is advantageous in terms of energy consumption for the processed product in a frozen state.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional system configuration diagram of a jitt burner type dry pulverizing apparatus showing an embodiment of the present invention.

FIG. 2 is a processing tank of the embodiment of FIG. 1 equipped with a git burner.

FIG. 3 is a perspective view showing a conventional jitt burner type dry crushing device.

FIG. 4 is a system diagram showing a conventional jitt burner type dry crushing device.

[Explanation of symbols]

1: Treatment tank, 2: Jit burner, 3: Compressed air, 4: Kerosene for fuel, 8: Ejected gas body, 10: Treated substance, 11 Treated substance supply means, 12: Product, 13: Exhaust gas, 14: Mixed gas Body, 15: outlet, 17: gravity type collector, 19: filter, 20: separating means, 21: branch valve, 22: temperature detecting means, 23: control device, 24: solenoid valve, 25: control valve, 26: Cushion tank, 27: Preheating means,

Front page continued (72) Inventor Hiroshi Fujinami 4-23-8 Towa, Adachi-ku, Tokyo Hitachi Techno Engineering Co., Ltd. Environmental Transportation Systems Division (72) Inventor Masayuki Masuda 4-6, Kanda Surugadai, Chiyoda-ku, Tokyo Address, Hitachi, Ltd.

Claims (2)

[Claims] 1. A treatment tank equipped with a jet burner, a treatment material supply means for supplying a treatment material to the treatment tank, and a treatment object which has been dried and pulverized by a gas body ejecting the treatment object from the jet burner. Drying provided with an outlet for discharging a mixed gas body, which is a mixture of gas bodies which became exhaust gas by the treatment, from the processing tank, and a collector section for separating the discharged object to be treated and the exhaust gas body In the crushing device, a gas measuring unit for measuring the amount of compressed air supplied to the jet burner, a temperature detecting unit for detecting the temperature of the mixed gas body, and a unit for giving a shock by air pressure to the filter of the collector unit. A supply amount adjusting means for adjusting the supply amount of the processed material of the processing material supplying means, a supply amount of the compressed air obtained from the gas measuring means, and a temperature obtained from the temperature detecting means. A jet burner type dry pulverizing apparatus comprising control means for controlling the impact means and the supply amount adjusting means depending on the degree. 2. The dry pulverization apparatus according to claim 1, wherein a preheating means for preheating a processed material supplied to the processing tank, and a branch valve for connecting the exhaust gas body to the preheating means according to a command from the control means. A jet burner type dry crushing device characterized by being provided with.