JP2007283202A - Wet type apparatus for collecting dust and garbage drying system equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-price wet type apparatus for collecting dust that recovers water contained in the emission gas and utilizes it as replenishment water and a low-price and compact garbage drying system equipped with the same. <P>SOLUTION: The wet type apparatus 8 for collecting dust is comprised of a sealed casing 70 for storing a treatment liquid W equipped with a gas suction port 71 and a gas discharge port 73, a cooler 74 disposed in a gas flow path 77 that allows a gas to flow from the gas suction port 71 to the gas discharge port 73 for cooling gas in the gas flow path 77. The wet type apparatus 8 for collecting dust removes dust from the gas in the gas flow path 77 by the treatment liquid W and dehumidifies the gas by causing moisture contained in the gas to condense by the cooler 74. The cooler 74 is disposed in the casing 70. Water resulting from the condensation of the moisture contained in the gas by the cooler 74 is recovered in the casing 70 and utilized as the treatment liquid W. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wet dust collector and a garbage drying system including the wet dust collector.

  Conventionally, wet dust collectors have been used for the purpose of collecting dust such as exhaust gas discharged from various devices. A wet dust collector is a device that removes dust from the gas by bringing the gas containing the dust into contact with a liquid.

  Usually, a wet dust collector is provided with a sealed casing, and a flow path through which a gas containing dust is circulated is formed inside the casing. The flow path is formed to meander up and down, and the lower side of the member forming the flow path is immersed in a liquid for collecting dust (hereinafter referred to as processing liquid).

  The gas introduced into the casing comes into contact with the processing liquid when passing through the flow path. At this time, dust contained in the gas is removed by the treatment liquid. And the gas which flowed out of the flow path is discharged | emitted from a casing as collected gas.

  By the way, the processing liquid after dust removal has a high dust concentration. However, when the dust concentration is increased, the dust removal performance of the processing liquid is significantly reduced. In view of this, in the wet dust collector, a part of the processing liquid is periodically extracted and replenished with new water to dilute the processing liquid and prevent a reduction in dust removal performance.

  However, the wet dust collector as described above has a problem that the amount of water consumption increases because a large amount of water must be replenished from the outside along with the dust collecting operation. On the other hand, in exhaust gas, there is exhaust gas containing a lot of water, such as exhaust gas discharged from boilers, garbage drying devices, etc., and it is possible to effectively use these contained water as part of the treatment liquid. It was desired.

  Therefore, conventionally, there has been proposed a wet dust collector that condenses and recovers moisture contained in the exhaust gas having such a high moisture content and uses it as makeup water for the wet dust collector (see, for example, Patent Document 1). .

  The wet dust collector includes a wet dust collector that removes dust in the exhaust gas, a supercooler that condenses moisture contained in the exhaust gas, a condensed water storage tank that stores condensed water, and a condensed water storage tank that stores the condensed water. A replenishing water supply line and a replenishing water supply pump for replenishing the wet condensed dust collector to the wet dust collector are provided.

JP 2001-327830 A

  However, in the wet dust collector, in order to recover the moisture in the exhaust gas, a supercooler, a condensed water storage tank, a makeup water supply line, and a makeup water supply pump must be provided outside the wet dust collector. There is a problem that the apparatus becomes large and expensive.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a wet dust collector that collects moisture contained in exhaust gas and uses it as makeup water, and a garbage drying system including the wet dust collector. The aim is to reduce the size and to provide these at a low cost.

  The wet dust collector according to the present invention includes an air inlet and an air outlet, a gas flow path extending from the air inlet to the air outlet, and a sealed casing for storing a processing liquid, A flow path forming member that partitions and forms part of the gas flow path so as to pass through the processing liquid, and is installed in the gas flow path, and the gas in the gas flow path is cooled and included in the gas And a cooler for condensing moisture.

  As described above, the wet dust collector includes a cooler. Therefore, the gas in the gas flow path can be dehumidified by removing dust with the treatment liquid and condensing the moisture contained in the gas with the cooler. The cooler is provided in the casing. Therefore, the moisture in the gas condensed by the cooler can be collected in the casing and used as it is as the processing liquid. Therefore, according to the wet dust collector, it is not necessary to replenish a large amount of water from the outside as in the prior art, and the running cost can be reduced. Furthermore, the provision of the cooler in the casing eliminates the need for a replenishment pump that transports replenishment water into the casing, and allows the entire apparatus to be reduced in size.

  It is preferable that the cooler is installed above the liquid level of the processing liquid so that the condensed water naturally falls toward the processing liquid stored in the casing.

  Thereby, the water condensed by the cooler is recovered smoothly. As in the prior art, condensed water can be recovered without providing a pump or the like, and the apparatus can be downsized. Moreover, such a wet dust collector can be provided at low cost.

  The cooler is preferably formed so as to guide the gas from above to below.

  This makes it easier for the condensed moisture to fall on the gas flow. Therefore, the condensed water can be collected more smoothly.

  By the way, in the wet dust collector, gas is introduced into the processing liquid to remove dust, and thus the gas after dust removal has a relatively high moisture content and high humidity. In addition, when the gas has an odor discharged from a garbage dryer or the like, it is necessary to deodorize in addition to dehumidification before exhausting. Here, when performing catalyst deodorization, it is necessary to heat gas to predetermined temperature beforehand. However, when the humidity of the gas is high, the temperature hardly rises even when heated, and the amount of heat consumed for heating to a predetermined temperature increases. Moreover, even if it is heated and deodorized, if there is a lot of moisture in the gas, white smoke is produced when exhausting. Furthermore, when exhausting a gas having a high moisture content using an exhaust duct or the like, condensation or rust may occur in the exhaust duct. Even if the gas is to be reused as a heat source for drying garbage such as garbage, if the moisture content is high, the garbage is given water in reverse, which may hinder drying and is not useful.

  Therefore, it is preferable that the cooler is installed in a downstream portion of the gas flow path with respect to the processing liquid.

  Thus, the gas can be dehumidified after dust removal. Therefore, it becomes possible to reduce the humidity of the gas discharged from the wet dust collector. Therefore, even if the gas is exhausted, it does not turn into white smoke, and the amount of heat consumed for deodorization can be reduced. In addition, when the gas is reused in a garbage dryer or the like, since the humidity is low, the object to be dried can be effectively dried.

  The cooler is preferably a plate heat exchanger.

  Generally, it is preferable to use a plate heat exchanger with high heat exchange efficiency as the cooler. However, the plate heat exchanger has a property that the heat exchange efficiency is lowered when dust or the like is adsorbed, and is not suitable for heat exchange of gas mixed with dust.

  However, in the present wet dust collector, the gas is cooled after dust removal. Therefore, the gas passes through the cooler in a clean state that does not contain dust. Thereby, it can prevent that dust etc. adsorb | suck to a cooler. Therefore, in the present wet dust collector, a plate type heat exchanger having high heat exchange efficiency can be suitably used as the cooler.

  The casing is partitioned into a first space in which the flow path forming member is disposed and the intake port faces, a second space in which the cooler is disposed, and a third space in which the exhaust port faces. And at least the lower portions of the first and second spaces in which the processing liquid is stored communicate with each other while the gas flows in the order of the first space, the second space, and the third space. A partition member that forms a flow path; and in plan view, the second space and the third space are laterally adjacent to each other, and each of the second and third spaces is a part of the partition member It is preferable that the first space is adjacent to the first space in the vertical direction.

  Thus, in plan view, the second space and the third space are adjacent to each other in the horizontal direction, and the second space, the third space, and the first space are adjacent to the first space in the vertical direction. . With such an arrangement of each space, the wet dust collector can be miniaturized.

  The garbage drying system according to the present invention includes a drying device that dries garbage by heating, and the wet dust collector that removes dust contained in gas generated from the garbage in the drying device; It is equipped with.

  According to the garbage drying system, by using the wet dust collector, moisture contained in the gas generated from the garbage can be collected in the wet dust collector and used as replenishment water for the processing liquid. . Therefore, unlike the prior art, it is not necessary to supply a large amount of water to the wet dust collector from the outside, and the running cost can be reduced.

  A garbage drying system according to the present invention includes a dryer having a garbage storage chamber formed therein, and having an introduction portion for introducing gas into the garbage storage chamber, and a heating unit configured to heat the garbage in the garbage storage chamber. The heating device of 1, a gas return passage for guiding at least part of the gas generated from the garbage in the garbage storage chamber to the introduction part, and dust contained in the gas in the gas return passage is removed, A wet dust collector, and a second heating device for heating the gas downstream of the wet dust collector in the gas return passage.

  According to the above garbage drying system, the gas generated from the garbage flows out from the garbage storage chamber into the gas return passage, is removed by the wet dust collector, and is further heated by the second heating device, so that the garbage is accommodated. Returned to the room. Therefore, the gas generated from garbage can be reused as a heat source. Further, since the garbage is heated by both the first heating device and the return gas, the garbage can be sufficiently heated and dried. By the way, a large amount of moisture is contained in the gas generated from garbage and wet-collected. When heating such a high-humidity gas, a greater amount of heat is required than for a low-humidity gas. However, according to the system, since the return gas can be dehumidified in the wet dust collector, the amount of heat consumed by the second heating device can be reduced. Therefore, according to the present invention, a garbage drying system with low heat consumption and high drying performance can be provided at low cost.

  The garbage drying system according to the present invention includes a dryer that forms a garbage storage chamber therein, a first heating device that heats the garbage in the garbage storage chamber, and the garbage in the garbage storage chamber. More than the exhaust passage for exhausting at least a part of the generated gas to the outside, the wet dust collector for removing dust contained in the gas in the exhaust passage, and the wet dust collector in the exhaust passage A deodorizing device that includes a second heating device that heats the gas on the downstream side and deodorizes the gas in the exhaust passage heated by the second heating device using a catalyst.

  According to the above garbage drying system, the gas generated from the garbage flows out from the garbage storage chamber to the exhaust passage, is removed by the wet dust collector, and is further heated by the second heating device and exhausted to the outside. The By the way, a large amount of moisture is contained in the gas generated from garbage and wet-collected. Exhausting such a high-humidity gas causes white smoke or condensation, causing problems such as rusting in the exhaust duct. However, according to the system, since the gas can be dehumidified in the wet dust collector, it is possible to prevent the exhaust gas from becoming white smoke and to prevent condensation. Moreover, the amount of heat consumed by the second heating device in the deodorizing device can be reduced by lowering the humidity of the gas.

  The dryer has an introduction part for introducing gas into the garbage storage chamber, and the upstream side of the second heating device in the exhaust passage is used as the deodorizing device in the exhaust passage. A heat exchanger for exchanging heat with the gas on the downstream side, and a portion of the exhaust passage downstream of the heat exchanger and upstream of the second heating device, and the gas in the exhaust passage It is preferable that a gas return passage that partially leads to the introduction portion of the garbage storage chamber is provided.

  According to the above garbage drying system, the gas in the exhaust passage can be heated using the second heating device for the deodorizing device as a heating source. Therefore, waste heat due to deodorization can be used effectively. In the system, part of the gas in the exhaust passage heated by the heat exchanger is returned to the garbage storage chamber. Therefore, the gas generated from garbage can be reused as a heat source. By the way, in order to exhaust the gas generated from garbage, it is indispensable to deodorize, and a large amount of heat is required to deodorize. Therefore, the greater the amount of exhaust from the system, the greater the amount of heat consumed in the system and the higher the running cost. However, according to the present garbage drying system, the amount of gas exhaust discharged from the system can be reduced by reusing the exhaust gas as described above. Therefore, a garbage drying system with low heat consumption and high drying performance can be provided at low cost.

  As described above, according to the present invention, it is possible to reduce the size of a wet dust collector that collects moisture contained in exhaust gas and uses it as make-up water and a garbage drying system including the wet dust collector, and to reduce these costs at a low cost. Can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the garbage processing apparatus 1 according to the embodiment includes a garbage pulverizing system 2 and a garbage drying system 3. The garbage processing apparatus 1 is an apparatus that pulverizes and refines the garbage in the garbage crushing system 2, then heats and drys the garbage in the garbage drying system 3 and discharges it as dried garbage.

  The garbage pulverizing system 2 includes a pulverizer 4 for pulverizing the garbage, and a garbage hopper 5 for collecting the garbage crushed by the pulverizer 4. The garbage hopper 5 is connected to the garbage flow path 52 of the dryer 6 to be described later via the garbage supply pipe 16.

  The garbage drying system 3 includes a dryer 6, a boiler 7, a wet dust collector 8, a deodorizing device 20, and a heat exchanger 23.

  The dryer 6 has a double cylindrical structure including an inner cylinder 32 and an outer cylinder 33. The inner cylinder 32 is provided inside the outer cylinder 33 and is arranged coaxially with the outer cylinder 33. The inner cylinder 32 defines a garbage flow path 52 through which garbage flows in the inner cylinder 32, and a vapor flow path 50 is formed outside the inner cylinder 32 and inside the outer cylinder 33. .

  A cylindrical rotating shaft 36 is provided at the center of the inner cylinder 32. The rotating shaft 36 extends in the vertical direction in the garbage flow path 52. A plurality of discharge ports 56 are formed in the lower portion of the outer peripheral surface of the rotation shaft 36. However, the configuration of the dryer 6 is not limited to this.

  Fuel such as kerosene is used for the boiler 7. Although illustration is omitted, the boiler 7 is provided with an air intake part for taking in combustion air and a water supply part for taking in water. The boiler 7 generates steam by boiling water taken from the water supply unit.

  A steam discharge part (not shown) of the boiler 7 and the steam flow path 50 of the dryer 6 are connected via a steam pipe 11. Moreover, the steam flow path 50 and the water supply part of the boiler 7 are connected via the water distribution pipe 12.

  The wet dust collector 8 has an air inlet 71 and an air outlet 73 and includes a sealed casing 70 that stores the processing liquid W. The intake port 71 of the wet dust collector 8 is connected to the garbage channel 52 of the dryer 6 via the gas pipe 13. In the casing 70, a cooler 74 for cooling the gas flowing into the casing 70 from the gas pipe 13 is provided. The detailed configuration of the wet dust collector 8 will be described later.

  The exhaust port 73 of the wet dust collector 8 and the heat exchanger 23 are connected via a first exhaust pipe 85. The first exhaust pipe 85 is provided with an intake fan 40. The heat exchanger 23 includes a low temperature side flow path and a high temperature side flow path, and exchanges heat between the fluid in the low temperature side flow path and the fluid in the high temperature side flow path. The first exhaust pipe 85 is connected to the upstream end of the low temperature side flow path of the heat exchanger 23. On the other hand, the other end side of the low temperature side flow path of the heat exchanger 23 is connected to the deodorizing device 20 via the second exhaust pipe 86.

  The deodorizing device 20 contacts a gas containing odor supplied from the second exhaust pipe 86 through the wet dust collector 8 (hereinafter referred to as “odorous exhaust gas”) with the oxidation catalyst, and is harmful to the odorous exhaust gas. It is a device for oxidative decomposition of gas. In order to exert the catalytic function of the oxidation catalyst, it is preferable to preheat the odor exhaust gas to around 300 degrees Celsius. Therefore, the deodorizing apparatus 20 includes a heater 24 that preheats the odorous exhaust gas, and a catalyst tank 25 that oxidatively decomposes the odorous exhaust gas using an oxidation catalyst. In addition, the heater 24 may be integrally formed with the deodorizing apparatus 20, and is good also as a different body. Further, as the heater 24, any one that heats a gas, such as a heater or a heat exchanger, may be used. As the oxidation catalyst, a noble metal such as platinum or palladium and an oxide such as iron, manganese or nickel are appropriately used depending on the kind of harmful gas contained in the odor exhaust gas.

  The deodorizing device 20 and the upstream end of the high-temperature side flow path of the heat exchanger 23 are connected via a third exhaust pipe 87. As a result, the high-temperature gas heated and deodorized by the deodorizing device 20 is supplied into the high-temperature channel of the heat exchanger 23. Further, the other end portion of the fourth exhaust pipe 88 whose one end portion opens in the atmosphere is connected to the downstream side of the high temperature side flow path of the heat exchanger 23. As a result, after being discharged from the garbage flow path 52, the dust collected and dehumidified by the wet dust collector 8 and deodorized and detoxified by the deodorizer 20 is exhausted into the atmosphere.

  On the other hand, the gas return pipe 21 is connected to the middle part of the second exhaust pipe 86. The other end of the gas return pipe 21 is connected to the rotating shaft 36 of the dryer 6. Thereby, after being discharged from the garbage flow path 52, part of the gas collected and dehumidified by the wet dust collector 8 and heated in the heat exchanger 23 is a cylindrical rotating shaft of the dryer 6. 36. The gas introduced into the rotary shaft 36 is supplied into the dust channel 52 through the discharge port 56.

  The garbage path 52 of the dryer 6 is connected to the collector 10 via the garbage discharge pipe 17. The collector 10 temporarily stores dry waste after drying.

  Next, the configuration of the wet dust collector 8 will be described.

  As shown in FIG. 2, the wet dust collector 8 is composed of a bottom plate E whose central portion is bent into a valley shape, four flat side plates A to D, and a flat top plate F. The closed casing 70 having a substantially rectangular parallelepiped shape is provided. Hereinafter, for convenience of explanation, the four side surfaces A to D of the casing 70 are referred to as a left side plate A, a front plate B, a right side plate C, and a back plate D as shown in the figure.

  An intake port 71 for introducing gas is formed in the left side plate A of the casing 70. The intake port 71 is slightly above the vertical center of the left side plate A and is formed at the end on the front plate B side. The gas pipe 13 is connected to the intake port 71. An exhaust port 73 through which gas is led out is formed in the right side plate C of the casing 70. The exhaust port 73 is slightly above the vertical center of the right side plate C and is formed at the end on the back plate D side. A first exhaust pipe 85 is connected to the exhaust port 73. A drain pipe 27 for discharging the processing liquid W is connected to the bottom of the right side plate C of the casing 70.

  As shown in FIG. 3, the processing liquid W is stored inside the casing 70. An overflow pipe 72 for discharging the increased processing liquid W is connected to the back plate D of the casing 70. Therefore, the height of the liquid level WL of the processing liquid W is equal to or lower than the overflow pipe 72. The overflow pipe 72 is provided at a position lower than the intake port 71.

  A partition member 75 is disposed inside the casing 70. As shown in FIG. 4, the partition member 75 includes a first partition portion 75a extending in the vertical and horizontal directions, and a second partition portion 75b extending above the center portion in the vertical direction of the first partition portion 75a and rearward from the center portion. And. As shown in FIG. 3, the partition member 75 includes a first partition portion 75 a that spans between the left side plate A and the right side plate C, and a second partition portion 75 b that includes the first partition portion 75 a and the back plate D. It is installed so that it can be bridged between. The upper ends of the first partition 75a and the second partition 75b are in contact with the top of the casing 70 without any gap. The lower end of the first partition 75a is positioned above the bottom of the casing 70 and below the liquid level WL, and the lower end of the second partition 75b is positioned above the liquid WL. Yes. With such a shape, the partition member 75 partitions the first space R1 in front of the first partition portion 75a by the first partition portion 75a and the space behind the first partition portion 75a by the second partition portion 75b. Is partitioned into a second space R2 on the left side plate A side and a third space R3 on the right side plate C side (see FIG. 4). The aforementioned intake port 71 is formed in the first space R1, and the exhaust port 73 is formed in the third space R3.

  As shown in FIG. 4, a plurality of flow path forming plates 57 a to 57 d are fixed to the surface of the partition member 75 on the first space R <b> 1 side.

  As shown in FIG. 5, the first flow path forming plate 57 a is disposed at a position spaced apart from the left side plate A in the right direction above the intake port 71, and extends in the vertical direction in parallel with the left side plate A. Yes. The upper end portion of the first flow path forming plate 57a is bent and extends leftward, and is in contact with the upper portion of the intake port 71 of the left side plate A without a gap. On the other hand, the lower end portion of the first flow path forming plate 57a is bent toward the right diagonally downward direction, and further bent to extend to the right.

  The second flow path forming plate 57b is disposed vertically below the first flow path forming plate 57a and extends in the vertical direction in parallel with the left side plate A. The upper end portion of the second flow path forming plate 57b is bent toward the upper right and then further bent and extends to the right. The bent portion extending in the right direction of the second flow path forming plate 57b is shorter in the left-right direction than the bent portion extending in the right direction of the first flow path forming plate 57a, and has a length of about a quarter. Is formed. A gap 41 extending in the left-right direction is formed between the lower end bent portion of the first flow path forming plate 57a and the bent portion of the second flow path forming plate 57b.

  The third flow path forming plate 57c is disposed at a position spaced a predetermined distance in the right direction from the vertical portion of the first flow path forming plate 57a and the vertical portion of the second flow path forming plate 57b, and the first flow path forming plate 57a. And the vertical portion of the second flow path forming plate 57b extend in the vertical direction. The upper end portion of the third flow path forming plate 57c is located below the central portion of the first flow path forming plate 57a in the up-down direction, bent toward the left obliquely upward direction, and further bent to the left. It extends. The left end of the bent portion of the third flow path forming plate 57c is located to the right of the vertical portion of the first flow path forming plate 57a and to the left of the right end of the bent portion of the first flow path forming plate 57a. ing. The bent portion of the third flow path forming plate 57c extends in parallel with the lower bent portion of the first flow path forming plate 57a at a position away from the lower bent portion of the first flow path forming plate 57a. On the other hand, the lower end portion of the vertical portion of the third flow path forming plate 57c is located at substantially the same height as the lower end portion of the vertical portion of the second flow path forming plate 57b.

  The fourth flow path forming plate 57d extends rightward from the first flow path forming plate 57a above the vertical central portion of the vertical portion of the first flow path forming plate 57a. The right end portion of the fourth flow path forming plate 57d is bent obliquely downward to the right. The fourth flow path forming plate 57d extends in parallel with the bent portion of the third flow path forming plate 57c at a position away from the bent portion of the third flow path forming plate 57c. A discharge port 58 is formed by the right end portion of the fourth flow path forming plate 57d and the right end portion of the third flow path forming plate 57c.

  The first flow path forming plate 57a, the second flow path forming plate 57b, the third flow path forming plate 57c, and the fourth flow path forming plate 57d are gas flow channels 77 that allow gas to flow from the intake port 71 to the exhaust port 73. A part of (see FIG. 6) is partitioned to pass through the processing liquid W. Note that these flow path forming plates 57a to 57d are classified and described for convenience of description, and some or all of them may be integrated. In addition, some or all of the flow path forming plates 57a to 57d may be a combination of a plurality of plates. Further, the shape of the gas flow path 77 is not limited at all, and the number of flow path forming plates forming the gas flow path 77 is not limited at all. The member forming the gas flow path 77 is not limited to the plate-like member, and may be another member such as a block body.

  As shown in FIG. 3, a cooler 74 is installed in the second space R2 partitioned by the first partition 75a and the second partition 75b. The cooler 74 is installed so as to be positioned below the top of the casing 70 and above the liquid level WL of the processing liquid W in the vertical direction. The cooler 74 is in contact with the first partition 75a, the second partition 75b, the left side plate A, and the back plate D without a gap, and divides the second space R2 into two spaces.

  As shown in FIG. 7, the cooler 74 includes a plate heat exchanger and includes a plurality of heat transfer plates 74 a installed in parallel in the vertical direction. As shown in FIG. 3, a water supply pipe 74b for guiding the cooling water to the heat transfer plate 74a is connected to the end of the cooler 74 on the side of the back plate D. The water supply pipe 74 b penetrates the back plate D from the outside of the casing 70 and is connected to the cooler 74. On the other hand, a drain pipe 74c for discharging cooling water that has circulated through the heat transfer plate 74a is connected to the end of the front plate B of the cooler 74. The drain pipe 74 c is bent and extends leftward, and extends through the left side plate A to the outside of the casing 70. The water supply pipe 74 b is connected to a cooling water supply device (not shown) outside the casing 70. With such a structure, the heat transfer plate 74a of the cooler 74 is cooled by the cooling water introduced from the water supply pipe 74b. Thereby, the gas flowing into the second space R2 is cooled by the heat transfer plate 74a when passing through the cooler 74 from the upper side to the lower side. At this time, moisture in the gas is condensed into water droplets and falls toward the liquid level WL of the processing liquid W.

  An automatic water supply device 60 is provided on the right side plate C of the casing 70. The automatic water supply device 60 includes a tank 61, a water supply pipe 63 connected to the front side surface of the tank 61, and a ball tap type automatic opening / closing mechanism 62 that opens and closes the flow path of the water supply pipe 63. In the present embodiment, the water supply pipe 63 is connected to a water pipe (not shown), and tap water is supplied from the water supply pipe 63 as necessary. Accordingly, when the liquid level WL becomes lower than the predetermined position, the water supply pipe 63 is released by the automatic opening / closing mechanism 62, and the tap water is supplied into the casing 70 through the water supply pipe 63. However, in the present wet dust collector 8, as described above, moisture in the gas in the casing 70 is condensed and replenished to the processing liquid W, so the automatic water feeder 60 hardly operates. It is replenished when the processing liquid W is pulled out in a large amount.

  The above is the configuration of the garbage disposal apparatus 1. Next, the operation of the garbage disposal apparatus 1 will be described.

  As shown in FIG. 1, the high-temperature steam supplied from the boiler 7 flows through the steam pipe 11 and then flows into the steam channel 50 of the dryer 6. The steam flowing downward through the steam channel 50 exchanges heat with the garbage in the garbage channel 52 and heats the garbage. At this time, the steam is cooled and condensed to become condensed water. The condensed water is discharged through a discharge port (not shown), and returned to the water supply unit (not shown) of the boiler 7 through the water distribution pipe 12. The condensed water returned to the boiler 7 is heated and evaporated by the boiler 7, and becomes steam again, and is supplied to the steam flow path 50 of the dryer 6 through the steam pipe 11.

  The garbage to be treated is first put into the pulverizer 4, pulverized by the pulverizer 4, and then collected in the garbage hopper 5. The garbage collected in the garbage hopper 5 is conveyed to the garbage flow path 52 of the dryer 6 by a screw (not shown).

  The garbage conveyed in the garbage channel 52 is conveyed upward in the garbage channel 52. At this time, the garbage is heated by the steam in the steam channel 50 through the wall surface of the inner cylinder 32. The garbage is agitated by a blade 57 attached to the rotary shaft 36 in the garbage flow path 52. As a result, water contained in the garbage is evaporated and the garbage is dried.

  On the other hand, the exhaust gas (high-humidity gas mixed with dust) generated in the garbage channel 52 is introduced into the wet dust collector 8 through the gas pipe 13. The exhaust gas is collected in the wet dust collector 8 and dehumidified, passes through the first exhaust pipe 85, and exchanges heat with steam discharged from the deodorizer 20 described later in the heat exchanger 23. I do. At this time, since the steam discharged from the deodorizer 20 is in a high temperature state of about 300 degrees Celsius due to heating before the deodorization in the deodorizer 20, the exhaust gas after passing through the wet dust collector 8 is heated.

  In this way, in the heat exchanger 23, the heated exhaust gas passes through the second exhaust pipe 86 and is introduced into the heater 24 of the deodorizer 20. The exhaust gas heated to around 300 degrees Celsius in the heater 24 is sent into the catalyst tank 25 and deodorized.

  The exhaust gas after deodorization passes through the third exhaust pipe 87 and exchanges heat with the exhaust gas after passing through the wet dust collector 8 described above in the heat exchanger 23. After heat exchange, the deodorized exhaust gas passes through the fourth exhaust pipe 88 and is exhausted to the atmosphere.

  On the other hand, in the heat exchanger 23, part of the heated exhaust gas passes through the gas return pipe 21 and is introduced into the cylindrical rotating shaft 36 of the dryer 6. The exhaust gas introduced into the rotary shaft 36 is supplied into the dust channel 52 through the discharge port 56. The exhaust gas supplied into the garbage flow path 52 comes into direct contact with the garbage, thereby directly heating the garbage without passing through the medium.

  Next, the operation of the wet dust collector 8 will be described in detail.

  As shown in FIG. 6, the exhaust gas is introduced into the casing 70 by the operation of the intake fan 40 (see FIG. 1). When the intake fan 40 (see FIG. 1) is operated, air is sucked from the exhaust port 73 toward the first exhaust pipe 85, and the atmospheric pressure in the third space R3 in the casing 70 drops. Since the third space R3 communicates with the first space R1 via the second space R2, the atmospheric pressure in the first space R1 decreases as the atmospheric pressure in the third space R3 decreases. Thereby, a negative pressure is also generated in the gas pipe 13 connected to the intake port 71, and the exhaust gas is sucked into the casing 70 from the intake port 71 by the negative pressure.

  As shown in FIG. 5, the exhaust gas sucked into the casing 70 first flows into the space defined by the first flow path forming plate 57a in the first space R1. At this time, the pressure on the discharge port 58 side is lower than the pressure on the suction port 71 side in the flow path forming plates 57a to 57d in the first space R1. Therefore, when the intake fan 40 is stopped, the height (solid line) of the liquid level WL that is the same at any position in the casing 70 becomes higher on the right side plate C side, and on the left side plate A side, the first flow path forming plate. It becomes lower than the gap 41 formed by 57a and the second flow path forming plate 57b (two-dot chain line). Thereby, the exhaust gas flows into the fourth flow path forming plate 57d side through the gap 41 and flows into the processing liquid W.

  As shown in FIG. 6, the exhaust gas flowing into the processing liquid W is discharged from the discharge port 58 while being removed by the processing liquid W, and rises in the first space R <b> 1. Thereafter, the air is sucked into the second space R2 by the intake fan 40 (see FIG. 1) and flows into the second space R2. The exhaust gas that has flowed into the second space R2 is sucked toward the third space R3 and passes through the cooler 74 downward from above. At this time, heat is exchanged with the cooling water in the heat transfer plate 74a via the heat transfer plate 74a of the cooler 74, and cooling is performed. As a result, the moisture in the gas is condensed to form water droplets and naturally falls toward the liquid level WL of the processing liquid W.

  The exhaust gas dehumidified by the cooler 74 flows into the third space R3 from below the cooler 74. The exhaust gas flowing into the third space R3 is discharged from the exhaust port 73 to the first exhaust pipe 85 (see FIG. 1) by the intake fan 40 (see FIG. 1).

  By the way, as described above, when the moisture in the exhaust gas is condensed and recovered in the processing liquid W, the water level of the processing liquid W increases. Therefore, when the processing liquid W reaches a predetermined water level or higher, the processing liquid W is automatically discharged from the overflow pipe 72 to the outside of the casing 70. Thereby, since the process liquid W is always replaced | exchanged for a small amount, it becomes possible to maintain the process liquid W in a comparatively beautiful state.

  On the other hand, when the wet dust collector 8 is operated for a long time, sludge is deposited on the bottom of the treatment liquid W. Therefore, after a certain amount of operation time has elapsed, the sludge is discharged from the drain pipe 27 together with the treatment liquid W. The treatment liquid W mixed with sludge discharged from the casing 70 is returned to the hopper 5 (see FIG. 1) by using a transfer device (not shown) or the like, so that it is sent to the dryer 6 (see FIG. 1) together with garbage. Can be dried.

  As described above, the wet dust collector 8 according to this embodiment includes the cooler 74. Therefore, in the apparatus 8, the gas in the gas flow path 77 can be removed by the processing liquid W, and the moisture contained in the gas can be condensed to dehumidify the gas. The cooler 74 is provided in the casing 70. Therefore, the moisture in the gas condensed by the cooler 74 can be recovered in the casing 70 and used as a processing liquid. Therefore, according to the wet dust collector 8, it is not necessary to replenish the treatment liquid W with a large amount of water as in the prior art, and the running cost can be reduced. Further, by providing the cooler 74 in the casing 0, the entire apparatus can be reduced in size.

  Further, in the present wet dust collector 8, the gas in the gas flow path 77 circulates in the cooler 74 from the upper side to the lower side, and is discharged toward the liquid level of the processing liquid W below the cooler 74. It will be. Therefore, the condensed water generated by being cooled by the cooler 74 is guided to the treatment liquid W by natural fall. Therefore, unlike the prior art, condensed water can be recovered without providing a pump or the like, and the apparatus can be miniaturized. Moreover, such a wet dust collector 8 can be provided at low cost. Further, since the gas flows in the cooler 74 from the upper side to the lower side, the condensed water is likely to fall downward along the gas flow. For this reason, the condensed water can be collected smoothly.

  In the garbage drying system 3 according to this embodiment, when performing catalyst deodorization, it is necessary to heat the gas to a predetermined temperature in advance. However, in the wet dust collector, gas is introduced into the processing liquid to remove dust, so that the gas after dust removal has a relatively high moisture content and high humidity. When the humidity of the gas is high, the temperature hardly rises even when heated, and the amount of heat consumed for heating to a predetermined temperature increases. Moreover, even if it is heated and deodorized, if there is a lot of moisture in the gas, white smoke is produced when exhausting. Furthermore, when exhausting a gas having a high moisture content using an exhaust duct or the like, condensation or rust may occur in the exhaust duct. Even if the gas is to be reused as a heat source for drying garbage such as garbage, if the moisture content is high, the garbage is given water in reverse, which may hinder drying and is not useful.

  However, in the present wet dust collector 8, the cooler 74 is installed in the second space R <b> 2 on the downstream side of the treatment liquid W in the gas flow path 77. Therefore, in this wet dust collector 8, gas is dehumidified after dust removal. As a result, the humidity of the gas discharged from the wet dust collector 8 can be lowered. Therefore, white smoke can be prevented even if the gas is exhausted. In addition, the amount of heat consumed (the amount of power consumed by the heater 24) required for deodorization can be reduced. Moreover, since the gas discharged | emitted from this wet dust collector 8 is low in humidity, it is suitable as a heat source for drying garbage in the dryer 6, and the gas can be reused.

  As the cooler, it is preferable to use a plate heat exchanger from the viewpoint of miniaturization of the apparatus and heat exchange efficiency. However, the plate heat exchanger has a property that the efficiency of heat exchange decreases when dust or the like is adsorbed, and is not suitable for heat exchange of gas mixed with dust.

  However, in this wet dust collector 8, the gas is cooled after dust removal. Therefore, the gas passes through the cooler 74 in a clean state that does not contain dust. Thereby, dust etc. can be prevented from adsorbing to the cooler 74. Therefore, in the present wet dust collector 8, it is possible to use a plate heat exchanger having high heat exchange efficiency as the cooler 74.

  In the casing 70 of the wet dust collector 8, the first space R1 is partitioned in front of the first partition 75a by the first partition 75a of the partition member 75, and the first partition is formed by the second partition 75b. A space behind 75a is partitioned into a second space R2 on the left side plate A side and a third space R3 on the right side plate C side. Therefore, in plan view, the second space R2 and the third space R3 are adjacent to each other in the left-right direction, and the second space R2 and the third space R3 are adjacent to the first space R1 in the front-rear direction. With such a spatial configuration, according to the present wet dust collector 8, the apparatus can be miniaturized.

  According to the present garbage drying system 3, the gas generated from the garbage is removed by the wet dust collector 8, further heated by the heater 24, and returned to the garbage flow path 52. Therefore, the gas generated from garbage can be reused as a heat source. Moreover, since garbage is heated by both the vapor | steam of the vapor | steam flow path 50, and the said return gas, garbage can be fully heat-dried. By the way, a large amount of moisture is contained in the gas generated from garbage and wet-collected. When heating such a high-humidity gas, a greater amount of heat is required than for a low-humidity gas. However, according to the system 3, since the return gas can be dehumidified in the wet dust collector 8, the amount of heat consumed by the heater 24 can be reduced. Therefore, according to the present garbage drying system 3, it is possible to provide the garbage drying system 3 with low heat consumption and high drying performance at low cost.

  Further, according to the garbage drying system 3, the gas generated from the garbage is removed by the wet dust collector 8, and further heated by the heater 24 and exhausted to the outside. By the way, a large amount of moisture is contained in the gas generated from garbage and wet-collected. Exhausting such a high-humidity gas causes white smoke or condensation, causing problems such as rusting in the exhaust duct. However, according to the system 3, since the gas can be dehumidified in the wet dust collector 8, it is possible to prevent the exhaust gas from becoming white smoke and to prevent dew condensation. Moreover, the amount of heat consumed by the heater 24 of the deodorizing device 20 can be reduced by lowering the humidity of the gas.

  Furthermore, according to the garbage drying system 3, the gas in the 1st exhaust pipe 85 can be heated by using the heater 24 for the deodorizing apparatus 20 as a heating source. Therefore, waste heat due to deodorization can be used effectively. In the system 3, a part of the gas heated by the heat exchanger 23 is returned into the garbage flow path 52. Therefore, the gas generated from garbage can be reused as a heat source. By the way, in order to exhaust the gas generated from garbage, it is indispensable to deodorize, and a large amount of heat is required to deodorize. Therefore, the greater the amount of exhaust from the system 3, the greater the amount of heat consumed in the system 3 and the higher the running cost. However, according to the present garbage drying system 3, the amount of gas exhausted from the system 3 can be reduced by reusing the exhaust gas as described above. Therefore, the garbage drying system 3 with low heat consumption and high drying performance can be provided at low cost.

  The wet dust collector 8 can also be used in systems other than the garbage drying system 3. In particular, dust removal of dusty high-humidity gas is suitably performed. In other systems, the running cost can be reduced by reducing the amount of water used.

  Moreover, in the garbage drying system 3 which concerns on this embodiment, the high temperature vapor | steam produced | generated by the boiler 7 is made to flow in into the steam flow path 50 of the dryer 6, and heat exchange with the garbage in the garbage flow path 52 is carried out. Therefore, it was supposed to heat the garbage. However, the heating source (first heating device) for drying the garbage is not limited to the high-temperature steam generated by the boiler 7 or the like. For example, heating may be performed using an electric heater or a gas burner. Even in this case, the above-described effects can be exhibited.

  As described above, the present invention is useful for a wet dust collector and a garbage drying system including the wet dust collector.

It is a lineblock diagram of a garbage processing device concerning this embodiment. It is an external view of a wet dust collector. It is an internal perspective view of a wet dust collector. It is a figure which expands and shows the partition member and flow-path formation board in FIG. It is front sectional drawing of a wet dust collector. It is a figure which shows a gas flow path in the internal perspective view of a wet dust collector. It is a figure which expands and shows the cooler in FIG.

Explanation of symbols

3 Garbage drying system 6 Dryer 7 Boiler (heating device, first heating device)
8 Wet dust collector 13 Gas piping (exhaust passage)
20 Deodorizer 21 Gas return pipe (gas return passage)
23 Heat exchanger 24 Heater (second heating device)
32 Inner cylinder (partition member)
50 Steam channel 52 Garbage channel 56 Discharge port (introduction part)
57a Flow path forming plate (flow path forming member)
57b Flow path forming plate (flow path forming member)
57c Flow path forming plate (flow path forming member)
57d Flow path forming plate (flow path forming member)
70 Casing 71 Intake port 73 Exhaust port 74 Cooler 75 Partition member 77 Gas passage 85 First exhaust pipe (exhaust passage)
86 Second exhaust pipe (exhaust passage)
87 Third exhaust pipe (exhaust passage)
88 4th exhaust pipe (exhaust passage)
R1 first space (first space)
R2 second space (second space)
R3 3rd space (3rd space)
W Treatment liquid WL Liquid surface

Claims (10)

An air inlet and an air outlet are formed, a gas flow path from the air inlet to the air outlet is provided therein, and a sealed casing for storing a processing liquid;
A flow path forming member that partitions and forms a part of the gas flow path through the treatment liquid;
A cooler that is installed in the gas flow path and cools the gas in the gas flow path to condense moisture contained in the gas;
Wet dust collector equipped with.   2. The wet collector according to claim 1, wherein the cooler is installed above the liquid level of the treatment liquid so that the condensed moisture naturally falls toward the treatment liquid stored in the casing. Dust equipment.   The wet cooler according to claim 2, wherein the cooler is configured to guide the gas from above to below.   The wet cooler according to any one of claims 1 to 3, wherein the cooler is installed in a portion of the gas flow path downstream of the processing liquid.   The wet cooler according to claim 4, wherein the cooler comprises a plate heat exchanger. The casing is partitioned into a first space in which the flow path forming member is disposed and the intake port faces, a second space in which the cooler is disposed, and a third space in which the exhaust port faces. And at least the lower portions of the first and second spaces in which the processing liquid is stored communicate with each other while the gas flows in the order of the first space, the second space, and the third space. A partition member for forming a flow path;
In plan view, the second space and the third space are laterally adjacent to each other, and each of the second and third spaces is vertically separated from the first space with a part of the partition member as a boundary. The wet dust collector according to claim 4 or 5, which is adjacent to the direction. A drying device for drying the garbage by heating;
The wet dust collector according to any one of claims 1 to 6, wherein dust contained in gas generated from garbage in the drying device is removed,
Garbage drying system equipped with. A drier having an introduction part for forming a garbage storage chamber inside and introducing gas into the garbage storage chamber;
A first heating device for heating the garbage in the garbage storage chamber;
A gas return passage for guiding at least part of the gas generated from the garbage in the garbage containing chamber to the introduction part;
The wet dust collector according to any one of claims 1 to 6, wherein dust contained in the gas in the gas return passage is removed.
A second heating device for heating the gas downstream of the wet dust collector in the gas return passage;
Garbage drying system equipped with. A dryer forming a garbage storage chamber inside;
A first heating device for heating the garbage in the garbage storage chamber;
An exhaust passage for exhausting at least part of the gas generated from the garbage in the garbage containing chamber to the outside;
The wet dust collector according to any one of claims 1 to 6, which removes dust contained in the gas in the exhaust passage,
A second heating device for heating a gas downstream of the wet dust collector in the exhaust passage, and deodorizing the gas in the exhaust passage heated by the second heating device using a catalyst; A deodorizing device,
Garbage drying system equipped with. The dryer has an introduction part for introducing gas into the garbage storage chamber,
A heat exchanger for exchanging heat between the gas upstream of the second heating device in the exhaust passage and the gas downstream of the deodorizing device in the exhaust passage;
A gas that is connected to a portion of the exhaust passage downstream of the heat exchanger and upstream of the second heating device, and guides a part of the gas in the exhaust passage to the introduction portion of the garbage storage chamber A return passage,
The garbage drying system of Claim 9 provided with these.

Images