JP2006223980A - Steam-jet spraying device and thickening crushing dryer using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thickening crushing dryer with a steam-jet spraying device which prevents dew condensation in beginning of operation and increases dealing amount so that the whole of apparatus can be operated stably and efficiently. <P>SOLUTION: The dryer has a steam-flow adjustment part (2) for adjusting a steam-flow of high temperature and high pressure, a steam spraying nozzle (10) for spraying a steam from the steam-flow adjustment part (2), a high-temperature air supplying part (20) for supplying a high-temperature air, an ejector (15), having an air supplying opening (16) supplied with the high-temperature air, wherein steam sprayed from the steam spraying nozzle and the high-temperature air are mixed and its mixture gas is sprayed from a first spraying opening (19, 19a), and a drying chamber (35) wherein the first spraying opening of the ejector is opened inside and also a treating material is crushed and dried by the mixture gas being sprayed from the spraying opening. The high-temperature air is supplied to have a positive pressure near the air supplying opening of the ejector and the drying chamber has a second spraying opening, which sprays the high-temperature gas, supplied without passing the ejector from the high-temperature air supplying part, inside the drying chamber. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a steam jet injection device suitable for use in drying of okara, food residue, biological treatment surplus sludge and sewage sludge after water treatment, volume reduction of waste liquids related to electronics industry, and the like. The present invention relates to a concentrated pulverization drying apparatus.

  In recent years, from the viewpoint of laws and regulations including the Food Recycling Law, there is an increasing need for volume reduction of waste at the site of occurrence. Concentration crushing and drying equipment using conventional steam jet type drying equipment crushes the treated material such as waste by shock waves by forcibly colliding supersonic flow air with the treated material, thereby maximizing the evaporation surface area. Turn into. And the processed material can be efficiently dried by carrying out the airflow drying of the processed material crushed in this way on hot air (refer patent document 1). The concentration pulverization drying apparatus using this vapor jet injection apparatus has already been commercialized as a USS dryer and is commercially available with the following configuration.

  As shown in FIG. 9, the processed material is supplied from a raw material inlet 101 in the drying chamber 100 by, for example, a screw conveyor, a conveyance pump, or the like. The supplied processed material is pulverized by the high-speed air generated by the ejector 102, wound up along the inner wall in the drying chamber 100, and air-dried. When drying is completed, the product enters the separator (cyclone) 104 through the dried product and the exhaust discharge path 103, the dried product and air are separated, and the dried product is carried out.

On the other hand, the high-temperature air supplied from the burner is supplied to the air supply port 102 a of the ejector 102. As shown in FIG. 10, saturated steam is ejected from the steam injection nozzle 105 as supersonic steam, and the supersonic steam sucks high-temperature air supplied to the air inlet 102a using negative pressure, A mixed gas of high-temperature air and steam is jetted toward the processing object via the user 102b. After that, it passes through the drying chamber 100, and the separator 104 separates the dried product and air, and exhaust processing is performed.
JP-A-10-29358 (page 2-4, FIGS. 7 and 8)

  As described above, the conventional steam jet injection device and the concentration pulverization drying device using the same use the nozzle 105 using steam in order to blow the ultra-high speed hot air into the drying chamber 100, but the blown air is humid. Therefore, there is a problem that condensation tends to occur. Further, the ejector 102 that blows steam into the drying chamber 100 takes in high-temperature air from the air supply port 102a using negative pressure. As a result, the energy of the ejector 102 is used and consumed for both sucking hot air and blowing it into the drying chamber 100. For this reason, since only the amount of suction air equivalent to the amount of steam from the steam injection nozzle 105 can be fed into the diffuser, the steam ratio is large and the dew point temperature of the ejected air becomes high.

  On the other hand, in order to generate a shock wave capable of exerting a sufficient pulverizing effect on the processed material, a supersonic flow with a sufficient amount of steam is required, and in order to generate this supersonic flow, the throat of the diffuser is required. It is necessary to narrow the part. As a result, the amount of blown air is further reduced, and there arises a problem that the heat radiation required by the dryer and the exchange heat required by the processed product cannot be sufficiently ensured. For example, the conventional steam jet injection device has a sufficient crushing action when processing a processed material of about 250 kg for a time, while the temperature of hot air supplied by the ejector 102 is about 600 ° C. Could not supply enough heat for drying.

  This tendency becomes more conspicuous as the equipment becomes larger.As a result, the exhaust temperature decreases, causing condensation at the start of operation, clogging due to condensation on the equipment surface such as the rotary valve, or condensation when using a bag filter. Problems occurred, and depending on the conditions, these devices could not be used, or heat insulation or steam tracing was required, making it difficult to operate as a device.

  In order to solve these problems, attempts have been made to increase the temperature of the diff user's blown air, that is, the hot air is supplied to the ejector intake section. There is a problem that the heat source supply mechanism for the dryer needs to be reviewed when the apparatus becomes large. In addition, the conventional steam jet injection device has installed a venturi burner that burns at a negative pressure near the ejector as the high-temperature air source. However, when the operation for increasing the combustion amount is performed, When it collapsed, it became difficult to burn under negative pressure, causing the fire to go out, and there was a problem that stable operation was not possible.

  The present invention was made to solve such problems, and can reliably prevent condensation at the start of operation and condensation on the surface of the accessory device, and can also increase the amount of processing, Accordingly, it is an object of the present invention to provide a steam jet injection device capable of stably and efficiently operating the entire device and a concentration pulverization drying device using the same.

  In order to solve the above-mentioned problems, the means employed by the present invention includes a steam flow adjusting unit that adjusts the steam flow by being supplied with high-temperature and high-pressure steam, and a jet attached to the downstream of the steam flow adjusting unit. A steam injection nozzle, a high-temperature air supply unit that supplies high-temperature air, and a steam that is attached to the steam injection nozzle and that is supplied with high-temperature air from the high-temperature air supply unit and that is injected from the steam injection nozzle In a vapor jet injection device including an ejector that mixes high-temperature air supplied from a high-temperature air supply unit and injects a mixed gas, the high-temperature air has a positive pressure at least in the vicinity of an air supply port of the ejector. It is to be supplied.

  The amount of high-temperature air supplied has been increased by supplying high-temperature air that has been supplied to the ejector as negative pressure or maximum isobaric pressure so that it is at least positive pressure in the vicinity of the air supply port of the ejector. Thus, the vapor ratio of the mixed gas of steam and high-temperature air mixed in the ejector decreases. For this reason, the humidity of the exhaust gas after the pulverization and drying of the processed material is significantly reduced, and the blown air volume is also dramatically increased.

  In the above-described steam jet injection device, for example, the high-temperature air supply unit has at least a damper for adjusting the flow velocity and is adjusted by a damper, or has at least a blower and adjusts the positive pressure by changing the rotation speed of the blower. Do. The pressure adjustment of the high-temperature air can be easily and reliably performed by a damper or by changing the rotational speed of the blower.

  In the above-described vapor jet injection device, the flow rate of the mixed gas at the outlet of the ejector is desirably 100 m to 350 m per second. Even if the mixed gas is suppressed to a flow velocity in this range below the supersonic speed, a sufficient pulverization effect is recognized for a processed material that does not require a large pulverizing force, while the flow velocity at the ejector outlet is suppressed in this way. The pressure loss can be reduced, and the injection air volume can be increased. As a result, the supply flow rate of the high-temperature air increases, the steam ratio decreases, and the humidity of the exhaust gas after pulverization and drying of the processed product further decreases.

  Further, the means employed by the present invention includes a steam flow adjusting unit that adjusts the steam flow by being supplied with high-temperature and high-pressure steam, a steam injection nozzle that is attached downstream of the steam flow adjusting unit and injects steam, and a high temperature A high-temperature air supply unit that supplies air, a supply port that is attached to the steam injection nozzle and is supplied with high-temperature air from the high-temperature air supply unit, and is supplied from the steam and high-temperature air supply unit that are injected from the injection nozzle An ejector that mixes high-temperature air and injects a mixed gas from the first injection port, and the first injection port of the ejector is opened inside, and a processed gas is contained and processed by the mixed gas that is injected from the injection port. In a concentration pulverization drying apparatus using a steam jet injection device provided with a drying chamber for pulverizing and drying an object, the drying chamber has a second injection port, and the second injection port is a high-temperature air supply unit. From Eji In that to inject hot air supplied without passing through Kuta to the drying chamber.

  In this way, by directly injecting high-temperature air supplied to the drying chamber without an ejector into the drying chamber, the humidity of the exhaust gas after pulverization and drying of the processed material is greatly reduced, and the temperature of the equipment is also reduced. Can be significantly increased.

  In the concentration pulverization drying apparatus using the steam jet injection device, it is desirable that the high-temperature air is supplied so as to have a positive pressure at least near the air supply port of the ejector. Conventionally, by supplying high-temperature air that has been supplied as negative pressure or isobaric pressure into the ejector so as to have a positive pressure at least in the vicinity of the air supply port of the ejector, steam mixed in the ejector and high-temperature air The vapor ratio of the mixed gas decreases, and the humidity of the exhaust gas after pulverization and drying of the processed product further decreases.

  In the concentration pulverization drying apparatus using the above-described vapor jet injection apparatus, the drying chamber is formed in a cylindrical shape, and the mixed gas and / or the high-temperature air is 20 ° inward from the circumferential tangential direction to the inside of the drying chamber or from the tangential direction to the inside. It is desirable to be injected within the range. Thus, by injecting the mixed gas and / or high-temperature air into the inside of the drying chamber formed in a cylindrical shape within the range of 20 ° from the circumferential tangential direction or from the tangential direction to the rotation center side, A stable airflow can be formed, and the airflow can be further accelerated. Thereby, grinding | pulverization of a processed material and stirring drying of the pulverized processed material can be performed efficiently. This mixed gas and / or hot air is preferably injected in the range of 10 ° from the tangential direction to the inside, and more preferably injected substantially in the tangential direction.

  In the concentration pulverization / drying apparatus using the vapor jet injection device, for example, the first injection port and / or the second injection port have an opening formed in a circular shape or a slit shape.

  In the concentration pulverization drying apparatus using the vapor jet injection device, it is desirable that a plurality of the first injection ports and / or the second injection ports are provided. By disposing a plurality of injection ports, the air volume into the drying chamber can be further increased, and the humidity of the exhaust gas after pulverization and drying of the processed product can be further reduced.

  In the concentration pulverization drying apparatus using the vapor jet injection device, high-temperature air can be injected from the second injection port without injecting the mixed gas from the first injection port. By doing so, for example, a large amount of high-temperature air can be supplied into the drying chamber as preheating at the start of operation, and thus condensation at the start of operation can be reliably prevented.

  A steam jet injection device according to the present invention includes a steam flow adjusting unit that adjusts a steam flow by being supplied with high-temperature and high-pressure steam, a steam injection nozzle that is attached downstream of the steam flow adjusting unit and injects steam, and high-temperature air A high-temperature air supply unit for supplying the steam and a supply port for supplying high-temperature air from the high-temperature air supply unit while being attached to the steam-injection nozzle, and supplying the steam injected from the steam-injection nozzle and the high-temperature air supply unit And an ejector for injecting a mixed gas by mixing with the high-temperature air to be supplied, and the high-temperature air is supplied at a positive pressure at least in the vicinity of the air supply port of the ejector. The humidity of the mixed gas of steam and high-temperature air mixed in the ejector can be drastically reduced, and the blown air volume can be dramatically increased to greatly increase the throughput. It exhibits an excellent effect that it is.

  Along with this, for example, it is possible to reliably prevent condensation at the start of operation and condensation on the surface of the accessory equipment of a concentration pulverization drying apparatus using this vapor jet injection apparatus, and the entire apparatus is stable and efficient. Driving.

  Further, the concentration pulverization drying apparatus using the steam jet injection device of the present invention includes a steam flow adjusting unit that adjusts the steam flow by being supplied with high-temperature and high-pressure steam, and a steam flow adjusting unit that is attached downstream of the steam flow adjusting unit. A steam injection nozzle that injects, a high-temperature air supply unit that supplies high-temperature air, and an air supply port that is attached to the steam injection nozzle and that is supplied with high-temperature air from the high-temperature air supply unit. An ejector that mixes the steam and high-temperature air supplied from the high-temperature air supply unit to inject the mixed gas from the first injection port, and the first injection port of the ejector is opened inside, and the processed material is accommodated therein. And a drying chamber that crushes and drys the processed product with the gas mixture injected from the injection port, the drying chamber has a second injection port, and the second injection port is ejected from the high-temperature air supply unit. Not through Since jetting the hot air supplied to the drying chamber, together with the humidity of the exhaust gas after grinding and drying the treated product can be significantly reduced, it is possible to raise the temperature of the equipment.

  Therefore, dew condensation at the start of operation of the apparatus and dew condensation on the surface of the accessory device can be surely prevented, and an excellent effect that the entire apparatus can be operated stably and efficiently is achieved.

  BEST MODE FOR CARRYING OUT THE INVENTION A best mode for carrying out a steam jet injection apparatus and a concentration pulverization drying apparatus using the same according to the present invention will be described in detail with reference to FIGS.

  As shown in FIG. 1, a steam flow adjusting unit 2 that adjusts a high-temperature and high-pressure steam flow supplied from the outside is disposed in a concentration pulverization drying apparatus 1 using a steam jet injection device. That is, a steam pipe 3 for introducing high-temperature and high-pressure steam from the outside, a pressure-reducing valve 4 for reducing the pressure of the steam, a flow rate adjusting valve 5 for adjusting the flow rate of steam, and a flow rate for measuring the flow rate of steam A pressure gauge 7 for measuring the steam pressure and a steam pipe 8 for supplying the adjusted steam to the steam injection nozzle 10 in the ejector 15 are arranged.

  A high temperature air supply unit 20 for supplying high temperature air is disposed in the concentration pulverization drying apparatus 1. That is, an air pipe 21 for introducing air from the outside, a flow rate adjusting valve 22 for adjusting the flow rate of the introduced air, a blower 23 for supplying the introduced air to the high-temperature air generator 24, and the introduced air A high-temperature air generator 24 for generating high-temperature air by heating, a burner 25 for heating air introduced from outside in the high-temperature air generator 24, a fuel supply pipe 26 for supplying fuel to the burner 25, and high-temperature air generation A thermometer 27 for measuring the temperature of the hot air generated in the device 24, a pressure gauge 28 for measuring the pressure of the hot air, an ejector hot air pipe 29 for introducing the hot air into the ejector 15, a hot air Are provided with a drying chamber high-temperature air pipe 30 for introducing the air into the drying chamber 35 to be described later, and a flow rate adjusting valve 31 for adjusting the flow rate of the high-temperature air to the drying chamber 35. .

  A raw material inlet 41 is provided near the tip of the ejector 15 in the drying chamber 35, and a processed material as a raw material is introduced from the raw material inlet 41 through a conduit 43. Further, a flow rate adjusting valve 42 for adjusting the flow rate of the processed material is disposed in the conduit 43. A dry product and an exhaust discharge path 44 are connected to the drying chamber 35, and a thermometer 45 for measuring the temperature of the exhaust gas and a pressure gauge 46 for measuring the pressure of the exhaust gas are arranged. The dried product and exhaust discharge path 44 is connected to a separator (cyclone) 50 for separating the dried product and the exhaust gas, and a dried product discharge port 51 is provided at the bottom of the separator 50. An exhaust pipe 52 for discharging exhaust gas to the outside, a flow rate adjusting valve 53 for adjusting the flow rate of exhaust gas, and a blower 54 for discharging the exhaust gas to the outside are connected to the separator 50 in this order. .

  FIG. 2 shows the internal structure of the ejector 15 and the steam injection nozzle 10 described above. The steam injection nozzle 10 is attached downstream of the steam flow adjusting unit 2 and injects the steam supplied from the steam flow adjusting unit 2 into the ejector 15 from the injection port 11 as a high-speed steam flow. The flow velocity of the vapor flow at the injection port 11 is normally set to be supersonic. An ejector 15 is attached coaxially with the steam injection nozzle 10. An air supply port 16 for supplying high-temperature air from the above-described high-temperature air supply unit 20 is disposed in the ejector 15 on the upstream side of the injection port 11 of the steam injection nozzle 10.

  A throat portion 17 of the ejector 15 is disposed on the downstream side of the injection port 11 of the steam injection nozzle 10, and a diffuser 18 is formed on the downstream side of the throat portion 17. The mixed gas of the steam injected from the steam injection nozzle 10 and the high-temperature air supplied from the high-temperature air supply unit 20 has the highest speed at the throat unit 17 and is decelerated and increased to a required flow rate by the diffuser 18 to be injected. Jetted from the mouth 19. The flow velocity at the injection port (outlet) 19 of the mixed gas ejector is adjusted to 100 m to 350 m per second.

  Even if the mixed gas is suppressed to a flow velocity in this range of less than supersonic speed, a sufficient pulverization effect is recognized for a processed material that does not require a large pulverization force, while the flow velocity at the outlet of the ejector 15 is thus suppressed. As a result, the pressure loss can be reduced and the air volume can be increased. As a result, the amount of hot air supplied increases, and the vapor ratio in the mixed gas further decreases. Note that the flow velocity at the injection port 19 of the ejector 15 of the mixed gas may be less than 100 m per second or higher than 350 m per second, for example, supersonic speed.

  The high temperature air supplied from the high temperature air supply unit 20 is supplied so as to have a positive pressure at least in the vicinity of the air supply port 16 of the ejector 15. This positive pressure adjustment can be performed by changing the rotational speed of the blower 23 shown in FIG. By changing the rotational speed of the blower, the pressure adjustment of the high-temperature air can be easily and reliably performed.

  In addition, as shown in FIG. 8, the damper (high temperature air supply part) 32 for flow velocity adjustment is provided between the air blower 23a and the high temperature air generator 24a, and the said positive pressure adjustment can also be performed with this damper 32. FIG. For example, the damper 32 includes a variable louver-like plate, and adjusts the positive pressure by changing the angle of the plate. The damper 32 also easily and reliably adjusts the pressure of high-temperature air. be able to. The positive pressure adjustment method is not limited to these.

  As described above, in the present steam jet injection device, the high-temperature air that has been conventionally supplied as a negative pressure or a maximum isobaric pressure in the ejector is supplied so as to have a positive pressure at least in the vicinity of the air inlet 16 of the ejector 15. . As a result, the flow rate of the high-temperature air is significantly increased. As a result, the vapor ratio of the mixed gas of the steam mixed in the ejector and the high-temperature air is decreased, and the humidity is significantly decreased. Along with this, the humidity of the exhaust gas after pulverization and drying of the processed product in the drying chamber 35 is also greatly reduced, and the amount of blown air can be dramatically increased to greatly increase the processing amount. As a result, condensation at the start of operation of the apparatus and condensation on the surface of the accessory device can be reliably prevented, and the entire apparatus can be operated stably and efficiently.

  As shown in FIGS. 3 and 4, in addition to the ejection port 19 of the ejector 15 described above, the high temperature air is directly supplied to the drying chamber 35 from the high temperature air supply unit 20 without passing through the ejector 15. The injection port 48 of the high temperature air injection nozzle 47 is disposed. The flow rate of the high-temperature air injected into the drying chamber 35 through the high-temperature air injection nozzle 47 is performed by the flow rate control valve 31 disposed on the upstream side.

  As shown in FIG. 4, the opening of the injection port 19 of the ejector 15 and the injection port 48 of the high temperature air injection nozzle 47 are formed in a circular shape. The drying chamber 35 is provided with a raw material inlet 37 and a dried product and exhaust outlet 38. As shown in FIGS. 6 and 7, a scraper 40 that is rotated by a rotor 39 is provided inside the drying chamber 35, and the scraped product is scraped off the inner wall of the drying chamber 35.

  As shown in FIG. 3, the injection angle θ1 of the mixed gas injected from the injection port 19 of the ejector 15 and the injection angle θ2 of high temperature air injected from the injection port 48 of the high temperature air injection nozzle 47 are short cylindrical. In the circumferential tangential direction or in the range of 20 ° inward from the tangential direction, preferably in the range of 10 ° inward from the tangential direction, more preferably substantially in the tangential direction. Is set to be

  In this way, the air flow in the drying chamber 35 can be further accelerated by injecting the mixed gas and high-temperature air into the drying chamber 35 formed in a short cylindrical shape at an angle as close to the circumferential tangential direction as possible. In addition, the processed product can be pulverized and the pulverized processed product can be efficiently stirred and dried. Note that the injection angle θ1 of the mixed gas injected from the injection port 19 of the ejector 15 and the injection angle θ2 of high-temperature air injected from the injection port 48 of the high-temperature air injection nozzle 47 are not necessarily limited to the above ranges. Need not be set.

  Further, as shown in FIG. 5, the injection port 19a of the ejector 15a and the injection port 48a of the high-temperature air injection nozzle 47a are, for example, in the direction of the central axis 36 of the drying chamber 35 in which the opening is formed in a short cylindrical shape. It can also be formed into a flat slit shape. In this way, by forming the injection port 19a of the ejector 15a and the injection port 48a of the high temperature air injection nozzle 47a in the above-described circular shape or slit shape, the mixed gas or high temperature air is optimally injected into the drying chamber 35. be able to. Thereby, not only grinding | pulverization of the processed material accommodated in an inside but the drying can further be accelerated | stimulated.

  A plurality of these circular or slit-shaped injection ports can be provided regardless of FIGS. 4 and 5. By providing a plurality of injection ports, it is possible to further increase the air volume into the drying chamber, further reduce the humidity of exhaust gas after pulverization and drying of the processed material, and increase the processing volume. be able to.

  As described above, according to the concentration pulverization drying apparatus using the present steam jet injection apparatus, the drying chamber 35 is directly injected into the drying chamber 35 with high-temperature air supplied without the ejector 15. The humidity in 35 can be greatly reduced. As a result, the humidity of the exhaust gas after pulverization and drying of the processed product in the drying chamber 35 is greatly reduced, and condensation at the start of operation of the apparatus and condensation on the surface of the attached device can be reliably prevented, and the entire apparatus can be prevented. Can be operated stably and efficiently.

  Further, it is possible to inject only the high temperature air from the high temperature air injection nozzles 47 and 47a without injecting the mixed gas from the injection ports 19 and 19a of the vapor injection nozzle 10. By doing so, for example, a large amount of high-temperature air can be supplied into the drying chamber 35 as preheating at the start of operation, thereby reliably preventing condensation at the start of operation. However, such use is not necessarily limited to that at the start of operation, and can be widely used when it is desired to keep the temperature of the entire apparatus high.

  The above-described steam jet injection device and the concentration pulverization drying device using the same are merely examples, and various modifications can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention. .

  Among the best modes for carrying out the invention described above, the experimental results when the high-temperature air supplied from the high-temperature air supply unit 20 is supplied as a positive pressure in the vicinity of the air supply port 16 of the ejector 15 are as follows. Show.

(Invention) (Conventional)
Mass before treatment (kg / hr) 300 202
Moisture before drying (WB) (%) 85 ←
Moisture before drying (DB) (%) 566.7 ←
Mass after treatment (kg) 49.7 33.5
Moisture after drying (WB) (%) 9.5 ←
Moisture after drying (DB) (%) 10.5 ←
Evaporated water content (kg / hr) 250.3 168.5
LPG usage (Nm ³ / hr) 10.2 5.9
Dryer supply air amount (kg / hr) 1800 530
Same temperature (° C) 500 900
Same as above Absolute humidity (kg / kg) 0.028 0.046
Injection steam volume (kg / hr) 430 ←
Same temperature (° C) 151.1 ←
Same as above Vapor pressure (kg / cm ² G) 4 ←
Dryer exhaust air volume (kg / hr) 1800 530
Same temperature (° C) 144 144.5
Same as above Absolute humidity (kg / kg) 0.406 1.175
Dew point temperature (° C) 76 88.5

Thus, even in the same drying chamber 35, the processing amount of the processed material is increased by about 50% from 202 kg to 300 kg per hour, and the absolute humidity of the exhaust air of the dryer 35 is conventionally 1.175 kg / It is clear that what was kg was drastically reduced to 0.406 kg / kg in the present invention, and that the dew point temperature was 88.5 ° C in the past, but was reduced to 76 ° C in the present invention. became.

It is a block diagram which shows the steam jet injection apparatus of this invention, and the concentration pulverization drying apparatus using the same. It is sectional drawing which shows the steam jet injection apparatus of FIG. It is a front view which shows the drying chamber of FIG. It is sectional drawing in the arrow line VI-VI of FIG. FIG. 5 is a cross-sectional view showing an injection port different from FIG. 4. It is front sectional drawing which shows the drying chamber of FIG. It is sectional drawing in the arrow VII-VII of FIG. It is a block diagram which shows the vapor jet injection apparatus different from FIG. 1, and the concentration crushing drying apparatus using the same. It is a block diagram which shows the conventional steam jet injection apparatus and the concentration pulverization drying apparatus using the same. It is sectional drawing which shows the steam jet injection apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Concentration grinding | pulverization drying apparatus 2 using a steam jet injection apparatus 2 Steam flow adjustment part 3 Steam pipe 4 Pressure reducing valve 5 Flow control valve 6 Flowmeter 7 Pressure gauge 8 Steam pipe 10 Steam injection nozzle 11 Injection port 15, 15a Ejector 16 Supply air Port 17 Throat section 18 Diffuser 19, 19a Injection port 20 High temperature air supply section 21 Air pipe 22 Flow rate adjusting valve 23, 23a Blower 24, 24a High temperature air generator 25 Burner 26 Fuel supply pipe 27 Thermometer 28 Pressure gauge 29 Ejector high temperature air Pipe 30 Drying chamber high-temperature air pipe 31 Flow rate adjusting valve 32 Damper 35 Drying chamber 36 Central shaft 37 Raw material inlet 38 Dry product and exhaust outlet 39 Rotor 40 Scraper 41 Raw material inlet 42 Flow rate adjusting valve 44 Dry product and exhaust exhaust path 45 Thermometer 46 Pressure gauge 47, 47a High temperature air injection nozzle 48, 48a Injection port 50 Separator 51 Dry product Discharge port 52 Exhaust pipe 53 Flow rate adjusting valve 54 Blower 100 Drying chamber 101 Raw material inlet 102 Ejector 102a Air supply port 102b Diffuser 103 Dry product and exhaust discharge path 104 Separator 105 Steam injection nozzles θ1, θ2 Injection angle

Claims (9)

  A steam flow adjusting unit (2) that adjusts the steam flow by being supplied with high-temperature and high-pressure steam, a steam injection nozzle (10) that is attached downstream of the steam flow adjusting unit and injects the steam, and high-temperature air A high-temperature air supply unit (20) for supplying air and an air supply port (16) attached to the vapor injection nozzle and supplied with the high-temperature air from the high-temperature air supply unit, and injected from the vapor injection nozzle In the vapor jet injection device comprising: an ejector (15) that mixes steam and the high-temperature air supplied from the high-temperature air supply unit to inject the mixed gas, the high-temperature air is at least supplied to the ejector. A steam jet injection device, characterized in that it is supplied so as to have a positive pressure in the vicinity of a mouth.   The high-temperature air supply unit has at least a damper (32) for adjusting a flow velocity and adjusts the positive pressure by changing the rotational speed of the fan by using the damper or at least a fan (23). The vapor jet injection device according to claim 1, wherein the vapor jet injection device is performed.   The steam jet injection device according to claim 1 or 2, wherein a flow velocity of the mixed gas at an outlet (19, 19a) of the ejector (15) is 100 m to 350 m per second.   A steam flow adjusting unit (2) that adjusts the steam flow by being supplied with high-temperature and high-pressure steam, a steam injection nozzle (10) that is attached downstream of the steam flow adjusting unit and injects the steam, and high-temperature air A high-temperature air supply unit (20) for supplying air and an air supply port (16) attached to the vapor injection nozzle and supplied with the high-temperature air from the high-temperature air supply unit, and injected from the vapor injection nozzle An ejector (15) that mixes steam and the high-temperature air supplied from the high-temperature air supply unit and injects the mixed gas from a first injection port (19, 19a), and the first of the ejector inside. And a drying chamber (35) for containing a processed product, containing the processed product, and pulverizing and drying the processed product with the mixed gas injected from the injection port. In the concentration pulverization drying apparatus, the drying chamber has a second injection port (48, 48a), and the second injection port is supplied from the high-temperature air supply unit without passing through the ejector. A concentration pulverization drying apparatus using a steam jet spraying device, wherein the steam is sprayed into the drying chamber.   The concentration using the steam jet injection device according to claim 4, wherein the high-temperature air is supplied so as to have a positive pressure at least in the vicinity of the air supply port (16) of the ejector (15). Crushing and drying equipment.   The drying chamber (35) is formed in a cylindrical shape, and the mixed gas and / or the high-temperature air are injected into the drying chamber in a circumferential tangential direction or in a range of 20 ° from the tangential direction to the inside. A concentration pulverization drying apparatus using the steam jet injection device according to claim 4 or 5.   The said 1st injection port (19, 19a) and / or the said 2nd injection port (48, 48a) are any one of the Claims 4 thru | or 6 by which an opening part is formed in circular shape or slit shape. A concentration pulverization drying apparatus using the vapor jet injection apparatus according to claim 1.   The plurality of the first injection ports (19, 19a) and / or the second injection ports (48, 48a) are arranged as claimed in any one of claims 4 to 7. Concentration pulverization drying apparatus using a steam jet injection apparatus. 9. The high-temperature air is injected from the second injection port (48, 48a) without injecting the mixed gas from the first injection port (19, 19a). A concentration pulverization drying apparatus using the vapor jet injection apparatus according to any one of the above.

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