JP2006044840A - Powder discharging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive powder discharging device capable of preventing or reducing air leakage and bites of powder grain. <P>SOLUTION: The powder discharging device is provided with a body casing 2 having a dust storage chamber 3 for storing dust from a dust inlet 2a, a dust discharge chamber 4 having a dust outlet, and a partition wall 5 vertically partitioning the dust storage chamber and the dust discharge chamber and provided with communicating ports 5b bored on both sides of the dust inlet to communicate with the dust storage chamber and dust discharge chamber; opening/closing covers 7a, 7b having opening/closing cover bodies 7e, 7f disposed in an openable/closable manner at the respective communicating ports, locking protrusion parts 7g-7j formed at the opening/closing cover bodies, and opening/closing mechanisms for putting the opening/closing cover bodies in opening operation to open the communicating ports when the locking parts are pressed in an opening direction; and a separator 6 reciprocated to the sides of a pair of communicating ports in a state of airtightly sealing the dust inlet in the dust storage chamber to push out the powder in the powder storage chamber to the sides of the pair of communicating ports, and putting the opening/closing mechanisms in opening operation to open the communicating ports when the locking parts of the opening/closing covers are pressed in the opening direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a powder that can be continuously discharged to the outside while maintaining dust-tightness in the dust collector or storage tank, such as dust collected by a dust collector or stored in a storage tank. It relates to a body discharge device.

  In general, dust collectors and dust removers, for example, separate powder or granular materials such as soot from combustion exhaust gas with an air filter such as a bag filter and store them at once. When discharging, since the inside of the dust collector has a negative pressure with respect to the outside air, it is necessary to discharge outside while maintaining airtightness with the outside air.

  As this type of conventional powder discharging apparatus such as dust, for example, there is a rotary feeder (for example, see Non-Patent Document 1). This rotary feeder forms a powder inlet at the upper end of the casing, and forms a powder outlet at the lower end, and rotates a plurality of sheets in the middle of the powder flow path in the casing connecting the powder inlet and the outlet. A rotor with blades is provided. When the powder falls from the powder inlet into the casing due to its own weight, the powder is received between the adjacent rotor blades in the circumferential direction of the rotary, and the rotor rotates by a predetermined angle to lower the powder below. It is transferred to the body inlet and discharged from the powder outlet to the outside by its own weight.

According to this type of rotary feeder, the powder inlet connected to the dust discharge port of the dust collector and the powder outlet opening to the outside air are hermetically sealed by the plurality of rotary blades of the rotary. The dust (dust) in the dust collector can be discharged to the outside (outside air) while maintaining the negative pressure inside.
"Revised 5th edition: Chemical Engineering Handbook" Editor: Japan Society for Chemical Engineering, Publisher: Maruzen Co., Ltd., issued on March 18, 1988, P870-871, P1024.

  However, in this type of conventional rotary feeder, the rotor cannot be rotated due to air leakage from the gap between the casing and the rotor blades and the biting of the powder particles, which may result in equipment damage.

  Furthermore, since only about half of the diameter direction of the powder flow path in the cylindrical casing is formed in the powder discharge path and the opposite side is not formed in the structure discharge path, the powder discharge efficiency is low.

  Further, when the rotor rotates, the outer peripheral surface of the rotor blade slides on the inner peripheral surface of the casing, so that the sliding surface is worn. For this reason, there exists a subject that the said air leak and the biting of powder particles increase increasingly. Furthermore, the process which improves the abrasion resistance of this sliding surface is required, and there also exists the subject that it is expensive.

  The present invention has been made in view of such circumstances, and its purpose is to prevent or reduce air leakage and powder particle entrapment with high powder discharge efficiency and inexpensive powder discharge. To provide an apparatus.

  A powder discharge apparatus according to claim 1 has a powder inlet for introducing powder, a powder storage chamber for storing powder, a powder discharge chamber having a powder outlet for discharging powder to the outside, Partitions are formed in the powder storage chamber and the powder discharge chamber in the vertical direction, and partition walls are formed on the both sides of the powder inlet to communicate with the powder storage chamber and the powder discharge chamber, respectively. The main body casing provided, the open / close lid main body disposed to be openable and closable at the communication ports, the locking portions formed on the open / close lid main body, An opening / closing lid provided with an opening / closing mechanism that opens the communication port by opening the opening / closing lid body when the stopper is pressed in the opening direction, and the pair of communication ports to the pair of communication ports in the powder storage chamber. This powder storage chamber moves back and forth in an airtight manner with respect to the powder inlet. A reciprocating body that pushes the powder to the side of the pair of communication ports and opens the communication port by opening the opening and closing mechanism when the locking portion of the opening and closing lid is pressed in the opening direction. It is the powder discharge apparatus characterized by the above-mentioned.

  The powder discharging apparatus according to claim 2, wherein at least one of contact surfaces where the powder storage chamber and the reciprocating body are in contact with each other is configured to be slidable. It is a powder discharge device.

  The powder discharging apparatus according to claim 3 is provided with a driving device for driving the reciprocating body.

  According to a fourth aspect of the present invention, there is provided the powder discharging apparatus according to the first aspect of the invention, wherein the locking portion is rotatably provided at one end portion pressed by the reciprocating member, 3. The powder discharging apparatus according to claim 1, wherein the powder discharge device is configured to open and open the communication port.

  The powder discharge device according to claim 5 is characterized in that the powder inlet of the powder storage chamber is connected to the dust discharge port of the dust collector for separating the dust from the exhaust gas. The powder discharging apparatus according to any one of the above.

  The powder discharge device according to claim 6 is configured such that the powder discharge chamber is connected to a transfer air ventilation pipe for passing transfer air for transferring the powder, and the powder in the powder discharge chamber is transferred for transfer. The powder discharge device according to any one of claims 1 to 5, wherein the powder discharge device is configured to be discharged from a powder discharge port by air.

  According to the present invention, between the powder inlet and the powder outlet of the main body casing is always closed by the partition wall and the normally closed opening / closing lid, while the opening / closing lid is opened by the reciprocating body, When the powder is discharged from the communication port to the powder discharge chamber, the communication port in this opening is hermetically sealed by the reciprocating body with respect to the powder inlet, so the powder inlet to the powder outlet It can be sealed hermetically at all times.

  In addition, each time the reciprocating body reciprocates to both sides of the powder inlet, the communication port on both sides of the powder inlet is opened by opening the open / close lid body, thereby dropping from the powder inlet into the powder storage chamber. In addition, since the inflowing powder can be discharged from the communication port to the powder discharge chamber and discharged from the powder outlet to the outside (outside air), the powder can be continuously discharged to the outside.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding parts are denoted by the same reference numerals.

(First embodiment)
FIG. 1 is a partially cutaway longitudinal sectional view of a dust discharge device 1 according to a first embodiment of a powder discharge device of the present invention, and FIGS. FIG.

  As shown in these drawings, the dust discharge device 1 is connected to a dust discharge port for discharging powder such as dust from a dust remover or dust collector (not shown) to the outside as dust d, or a dust outlet of a storage tank for storing this dust. A main body casing 2 that is a substantially rectangular tube-shaped sealed container, a dust storage chamber 3 that is an upper powder storage chamber, and a dust discharge chamber 4 that is a lower powder discharge chamber. And a separator 5 that is an example of a reciprocating body that reciprocates in the dust storage chamber 3 in the horizontal direction.

  The main body casing 2 forms a dust inlet 2a which is a powder inlet at a substantially central portion of the upper end portion of the upper dust storage chamber 3, and stores, for example, dust in a dust collector (not shown) in the dust inlet 2a. A dust outlet such as soot is connected, and dust d from the dust outlet of the storage tank or the like is caused to fall or flow into the dust storage chamber 3 from the dust inlet 2a mainly by its own weight.

  Moreover, the main body casing 2 forms a dust outlet 4b that opens to the outside (outside air) at a substantially central portion of the bottom 4a of the dust discharge chamber 4 below the main casing 2. The dust discharge chamber 4 has a bottom portion 4a formed in an inverted truncated pyramid-shaped rectangular tube shape whose diameter decreases toward the dust outlet 4b.

  The partition wall 5 is formed with a pair of rectangular communication ports 5a and 5b on the left and right sides of the dust inlet 2a in FIGS. 1 and 2, respectively, and the dust storage chamber 3 is connected to the dust discharge chamber 4 by the communication ports 5a and 5b. Communicating with These communication ports 5a and 5b are provided with normally closed opening and closing lids 7a and 7b, respectively, and a packing Pb for hermetically sealing the opening and closing lids 7a and 7b is provided at the opening edges of the communication ports 5a and 5b. Yes.

  The opening / closing lids 7a, 7b are attached to hinge pins 7c, 7d provided on the lower surfaces of both ends of the partition wall 5 so that the opening / closing lid bodies 7e, 7f having the same shape and size as the communication ports 5a, 5b can be opened and closed. As shown in FIG. 1, coiled normally closed springs 8a and 8b are provided on the lower surfaces of the open / close lid bodies 7e and 7f so as to urge the communication ports 5a and 5b in a direction to always close by the open / close lid bodies 7e and 7f. An open / close mechanism is configured.

  On the other hand, as shown in FIGS. 2 to 6, the opening / closing lid main bodies 7e and 7f have a pair of rod-like locking projections 7g and 7h at the inner end portions of the front and rear (in FIGS. 7i and 7j are projected. These locking protrusions 7g to 7j protrude from the inner ends of the opening / closing lid main bodies 7e and 7f toward the partition wall 5 at a required amount and at a required angle, and rollers 9a and 9b and 9c are provided at the protruding tips. And 9d are rotatably provided.

  As shown also in FIG. 1, the separator 6 is formed of a rectangular flat plate that is substantially the same size or slightly smaller than the side cross-sectional shape of the dust storage chamber 3, and has an upper end portion in FIG. A rectangular flat rubber packing 10 that is long in the front and back direction of the drawing is implanted.

  Further, both surfaces of the contact surface where the separator 6 and the partition wall 5 are in contact with each other, or one surface thereof, and at least one of both inner surfaces of the dust containing chamber 3 sliding on both side surfaces of the separator 6 in the longitudinal direction, Each is formed on a sliding surface 11 that can be slid by coating a mirror surface or a sliding material, etc., and the separator 6 slides in the dust storage chamber 3 in the lateral direction (left and right in FIGS. 1 to 6). It reciprocates between the left and right ends of the inlet 2a.

  The separator 6 is connected to a piston driving device 13 which is an example of a reciprocating driving device via a piston rod 12. One end of the piston rod 12 is fixed to the center of one side surface of the separator 6, while the other end of the piston rod 12 penetrates one side wall of the main body casing 2 in an airtight manner and extends to the outside. It is connected to a piston that does not reciprocate. In the penetrating portion where the piston rod 12 penetrates one side wall of the main casing 2, a packing Pa is provided for hermetically sealing the penetrating portion.

  The piston drive device 13 is configured to reciprocate the separator 6 between the left and right open positions where the open / close lids 7a and 7b are rotated in the opening direction to open the communication ports 5a and 5b.

  Next, the operation of the dust discharge device 1 according to this embodiment will be described.

  First, as shown in FIG. 2, when the separator 6 is driven by the piston driving device 13 to a position below one end (left end in FIG. 2) of the dust inlet 2a, the dust inlet 2a is fully opened.

  For this purpose, the dust, that is, the dust d from the dust outlet of the dust collector (not shown) or the dust outlet of the dust storage tank, that is, the dust d falls or flows into the dust storage chamber 3 of the main casing 2 by its own weight through the dust inlet 2a. At this time, since the communication ports 5a and 5b on the left and right sides of the separator 6 in FIG. 2 are sealed by the open / close lid bodies 7e and 7f, the dust inlet 2a is hermetically sealed to the outside (outside air). . For this reason, the negative pressure of the dust collector which is not illustrated connected to the dust inlet 2a or its dust storage tank can be maintained.

  Thereafter, as shown in FIG. 3, when the separator 6 gradually moves to the right side in the drawing while sliding on the sliding surface 11 of the partition wall 5, the separator 6 removes the dust d. It is pressed and moved to the right space of the storage chamber 3. As a result, as shown in FIG. 3, when the separator 6 is positioned approximately in the middle of the dust inlet 2b in the left-right direction in the figure, the dust d falls or flows from the dust inlet 2b to the left and right sides of the separator 6 in the dust storage chamber 3. .

  Next, as shown in FIG. 4, when the separator 6 moves to a position below the right end of the dust inlet 2b in the drawing, the dust inlet 2b is fully opened. For this reason, the dust d flows from the dust inlet 2b into the left space of the separator 6 in the dust storage chamber 3 in the figure. On the other hand, the dust d on the right side in FIG. 4 of the separator 6 is pressed into the right space of the dust storage chamber 3 and is moved onto the opening / closing lid body 7b on the right side in FIG.

  Thereafter, as shown in FIG. 5, when the separator 6 further moves to the right in FIG. 5, the right side in FIG. 5 of the separator 6 is the roller 9c of the pair of locking projections 7i, 7h of the right opening / closing lid 7b. , 9d. Further, as the separator 6 moves to the right side in FIG. 5, the right engaging projections 7i and 7h are further pressed rightward, so that the free end (right end) of the right opening / closing lid body 7b is a hinge pin. The normally closed spring 8b is gradually compressed in the axial direction by rotating downward about 7d.

  As a result, when the separator 6 further moves to the open position on the right side, the right end of the right opening / closing lid body 7b in the drawing rotates further downward around the hinge pin 7 against the spring force of the normally closed spring 8b, so that the fully open position. Until the right communication port 5b is fully opened.

  As a result, the dust d on the right opening / closing lid body 7b slides down on the downward inclined surface of the opening / closing lid body 7b, while the right communication port 5b in which the dust d pushed into the right space of the dust storage chamber 3 is fully opened. Are discharged into the dust discharge chamber 4. Also at this time, since the separator 6 hermetically seals the inside of the dust storage chamber 3 on the upstream side of the fully open right communication port 5b by the rubber packing 10 or the like, the dust inlet 2a is opened to the outside air. It can be hermetically sealed against the dust external outlet 4b. For this reason, the negative pressure in the dust collector which is not illustrated connected to the dust inlet 2b or its dust storage tank can be maintained. That is, the dust in the dust collector can be discharged outside while maintaining the negative pressure in the dust collector or in the dust storage tank.

  Thereafter, as shown in FIG. 6, the separator 6 gradually moves from the open position at the right end of the dust chamber 3 shown in FIG. 5 to the open position on the left end side, so that the separator 6 is below the right end of the dust inlet 2b in the figure. When the separator 6 is returned to the state, the engagement (contact) state between the separator 6 and the rollers 9c, 9d of the right engagement protrusions 7i, 7j is gradually released, so that the right opening / closing lid body 7b is a right normally closed spring. It is pressed by the spring restoring force of 8b to return to the closed position again, and the right communication port 5b is fully closed again by the right opening / closing lid body 7b.

  At this time, the dust d flows from the dust inlet 2b into the left space in FIG. 6 of the separator 6 in the dust storage chamber 3 by its own weight.

  Further, as the separator 6 moves to the left side in FIG. 6 in the dust accommodating chamber 3, the dust d is pushed and moved to the left space in the figure by the separator 6, and the left side surface of the separator 6 in the figure is the left side. When the separator 6 comes into contact with the pair of rollers 9a and 9b of the locking projections 7g and 7h and moves to the open position on the left side, as in the case of the rightward movement described above, the separator 6 is locked on the left opening / closing lid 7a. The parts 7g and 7h are pressed to the open position to compress the left-side normally closed spring 8a and fully open the left-side opening / closing lid body 7e.

  Therefore, the free end of the left opening / closing lid body 7e rotates around the left hinge pin 7c and rotates downward in the figure. As a result, the left communication port 5a is fully opened, and dust d is discharged from the left space of the dust storage chamber 3e into the dust discharge chamber 4 through the communication port 5a.

  Also at this time, since the separator 6 hermetically seals the dust storage chamber 3 on the upstream side of the fully open communication port 5a, the dust inlet 2b can be prevented from opening to the outside air.

  Therefore, the dust inlet 2b connected to the dust outlet of the negative pressure dust collector or the dust outlet of the dust storage tank is obtained by repeatedly reciprocating the separator 6 in the dust storage chamber 3 in the horizontal direction by the piston drive device 13. The dust d in the dust collector or its storage tank can be continuously discharged in a state of hermetically sealed from the outside air.

  Further, by appropriately controlling the number of reciprocations or the reciprocating speed of the separator 6 by the piston drive device 13, the amount of dust d continuously discharged from the dust outlet 4b to the outside can be easily controlled. Moreover, since both sides of the separator 6 in the dust storage chamber 3 are formed in the dust discharge passage, the discharge efficiency of the dust d can be improved.

  Furthermore, according to this dust discharge device 1, there is one separator 6 that slides on the sliding surface 11 of the partition wall 5, and a plurality of rotor blades that slide within the inner peripheral surface of the cylindrical casing are provided. Since there are fewer than the said rotary blade of the conventional rotary feeder, abrasion and air leakage of a sliding part can be reduced.

  Also, since the rotatable rollers 9a to 9d are provided at the tip ends of the locking projections 7g to 7j of the open / close lids 7a and 7b with which the separator 6 abuts, galling and wear due to the abutment are prevented or reduced. can do.

(Second Embodiment)
FIG. 7 is a schematic perspective view of a dust discharging apparatus 1A according to the second embodiment of the present invention. The dust discharge device 1A is configured by removing the dust outlet 4b of the dust discharge device 1 according to the first embodiment and sealing it, while conveying air on one side wall (right side wall in FIG. 7) of the dust discharge chamber 4. Is characterized in that the dust discharge pipe 15 is connected to the opposite wall (left side surface in FIG. 7).

  Therefore, according to the dust discharge device 1A, the air discharged from the blower pipe 14 is blown into the dust discharge chamber 4 so that the dust discharged into the dust discharge chamber 4 is transferred to the dust discharge pipe 15 by the transfer air. Can be continuously conveyed. Therefore, by piping the dust outlet end of the dust discharge pipe 15 to a required discharge destination, the dust d in the dust discharge chamber 4 can be discharged easily and quickly to the required dust discharge destination.

  Moreover, since it has the structure substantially the same as the dust discharge apparatus 1 which concerns on the said 1st Embodiment except arrange | positioning the ventilation pipe | tube 14 and the dust discharge pipe 15, it is substantially the same as the dust discharge apparatus 1 which concerns on the said 1st Embodiment. The effect of this can be achieved.

(Third embodiment)
FIG. 8 is a system diagram showing the overall configuration of the combustion flue gas treatment plant 21 according to the third embodiment of the present invention. This combustion flue gas treatment plant 21 has a dust discharge port 1 or 1A shown in FIG. 1 to FIG. 6 or FIG. 7 at a dust discharge port such as soot of a dust removing device 22 that is a dust collector or a dust discharge port of a dust storage tank. It is characterized by connecting

  As shown in FIG. 8, a combustion flue gas treatment plant 21 includes, for example, an incinerator 23 that is a combustion apparatus for incinerating combustibles such as industrial waste, a hot water cooling tower 24 that is a water-cooled flue gas cooler, an air-cooled type The first, second, third, fourth and fifth smoke exhaust ducts 28, 29, the air cooling tower 25 which is a smoke exhaust cooler, the dust removal device 22, the suction (attraction) fan 26 and the chimney 27 which is an exhaust chimney are connected. 30, 31, and 32 are sequentially connected in series.

  The incinerator 23 has an exhaust gas outlet side connected to an exhaust gas inlet of a hot water cooling tower 24 via a first smoke exhaust duct 28, and the high temperature and high pressure combustion exhaust gas (exhaust gas) from the incinerator 23 is first heated. It is cooled by the cooling tower 4.

  The hot water cooling tower 24 has an upper chamber (not shown) into which the exhaust gas from the incinerator 23 flows and a lower chamber into which the cooled exhaust gas flows. Are connected to each other by a plurality of smoke pipes, and the outer peripheral surfaces of these smoke pipes are cooled by hot water for cooling to constitute a water-cooled heat exchanger that indirectly cools the exhaust gas flowing in these smoke pipes. This water-cooled heat exchanger has a large heat absorption capacity because the refrigerant is water or hot water, and is suitable for downsizing the apparatus and quenching exhaust gas. The hot water cooling tower 24 has an exhaust gas outlet side of the lower chamber connected to an exhaust gas inlet side of the air cooling tower 25 via a second smoke exhaust duct 29.

  The air-cooling tower 25 is an air-cooled heat exchanger that cools a smoke pipe, which is a straight tubular heat exchange pipe (not shown) disposed in the main body casing, with cooling air having a required temperature. 2 is connected to the outlet side of the second smoke exhaust duct 29.

  The air cooling tower 25 is connected to the cooling air inlet at the lower portion of the main body casing of the cooling air outlet of the intake cooling fan 33 whose intake port is opened to the outside air. The outside air sucked by the cooling fan 33 is cooled by the cooling air. As a dry heat exchanger that cools the outer surface of the smoke pipe and indirectly cools the exhaust gas flowing through the smoke pipe. The air-cooling tower 25 is provided with a steam communication pipe 34 that communicates high-temperature cooling air heated by cooling the exhaust gas inside the main casing to a steam exhaust passage (not shown).

  The air cooling tower 25 has an exhaust gas outlet side connected to the dust removing device 22 via a third smoke exhaust duct 30, and neutralized via a neutralizer supply pipe 35 in the middle of the third smoke exhaust duct 30. A slaked lime feeder 36, which is an agent supply machine, is connected.

  The slaked lime feeder 36 is a joint 37 between the third smoke exhaust duct 30 and the neutralizing agent supply pipe 35 for slaked lime, which is an example of a neutralizing agent for neutralizing chlorine gas that is a raw material for dioxins in the exhaust gas. Is put into the exhaust gas.

  The dust remover 22 has a plurality of bag filters made of cloth (not shown) in its main casing, and a dust room (not shown) into which exhaust gas before dust removal flows, and a clean room into which exhaust gas after dust removal by the bag filter flows. And a dust storage tank (not shown) for storing dust or the like (dust) after dust removal processing, and the exhaust outlet side of the clean room is connected to the suction port end of the suction (attraction) fan 26 via the fourth smoke exhaust duct 31 The exhaust gas is exhausted from the chimney 27 to the atmosphere.

  And since the dust removal apparatus 22 has connected the dust inlet 2a of the said dust discharge apparatus 1 or 1A to the dust outlet of the dust discharge port or dust storage tank which is not illustrated, in this dust removal apparatus 22 thru | or the dust storage tank. With the negative pressure maintained, the dust can be continuously discharged to the outside (outside air) by the dust discharging device 1 or 1A.

1 is a partially cutaway schematic perspective view of a dust discharge device according to a first embodiment of the present invention. The principal part schematic longitudinal cross-sectional view which shows the effect | action of the dust discharge apparatus shown in FIG. 1, and shows the state which the separator drive to the left end lower position of the dust inlet. The principal part schematic longitudinal cross-sectional view which shows the effect | action of the dust discharge apparatus shown in FIG. 1, and shows the state which the separator drive to the substantially center lower position of the dust inlet. The principal part schematic longitudinal cross-sectional view which shows the effect | action of the dust discharge apparatus shown in FIG. 1, and shows the state which the separator drive to the right end lower position of the dust inlet. The principal part schematic longitudinal cross-sectional view which shows the effect | action of the dust discharge apparatus shown in FIG. 1, and shows the state which the separator drive | operated to the open position which opens the right side opening-and-closing lid main body by a separator and fully opens the right side communication port. The main part schematic longitudinal cross-sectional view which shows the effect | action of the dust discharge apparatus shown in FIG. 1, and shows the state which the separator moved backward from the open position shown in FIG. 5 to the right end lower position of a dust inlet again. The partial notch schematic perspective view of the dust discharge apparatus which concerns on the 2nd Embodiment of this invention. The system diagram which shows the whole structure of the combustion flue gas processing plant which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A Dust discharge device 2 Main body casing 2a Dust inlet 3 Dust storage chamber 4 Dust discharge chamber 4a Dust outlet 5 Bulkheads 5a, 5b A pair of communication ports 6 Separator 7a, 7b A pair of opening / closing lids 7e, 7f A pair of opening / closing lid main bodies 7g 7h, 7i and 7j Each pair of locking projections 9a and 9b, 9c and 9d Each pair of rollers 10 Rubber packing 11 Sliding surface 13 Piston drive device 14 Blow pipe 15 Dust discharge pipe

Claims (6)

A powder storage chamber having a powder inlet for introducing powder and storing powder, a powder discharge chamber having a powder outlet for discharging powder to the outside, the powder storage chamber and the powder discharge chamber And a main body casing provided with partition walls each having a communicating port communicating with the powder storage chamber and the powder discharge chamber on both sides of the powder inlet,
Opening / closing lid bodies disposed at the respective communication ports so as to be openable and closable, locking portions formed on the opening / closing lid bodies, and urging the opening / closing lid bodies in a direction to be always closed, while the locking portions are in an opening direction. An opening / closing lid provided with an opening / closing mechanism that opens the communication port by opening the opening / closing lid body when pressed;
In the powder storage chamber, reciprocating in a state of being airtightly sealed with respect to the powder inlet to the pair of communication ports, and extruding the powder in the powder storage chamber to the pair of communication ports, A reciprocating body that opens the communication port by opening the opening / closing mechanism when the locking portion of the opening / closing lid is pressed in the opening direction;
A powder discharging apparatus comprising: 2. The powder discharging apparatus according to claim 1, wherein at least one of contact surfaces where the powder storage chamber and the reciprocating body are in contact with each other is slidable. 3. The powder discharging apparatus according to claim 1, further comprising a driving device for driving the reciprocating body. The locking portion is provided so that a roller can be rotated at one end pressed by the reciprocating body, and when the roller is pressed by the reciprocating body, the opening / closing lid body is opened to open the communication port. The powder discharging apparatus according to claim 1 or 2, wherein the powder discharging apparatus is configured. The powder discharge according to any one of claims 1 to 4, wherein a powder inlet of the powder storage chamber is connected to a dust discharge port of a dust collector that separates the dust from the exhaust gas. apparatus. The powder discharge chamber is connected to a transfer air ventilation tube for passing a transfer air for transferring powder, and the powder in the powder discharge chamber is discharged from the powder discharge port by the transfer air. It is comprised, The powder discharge device of any one of Claims 1-5 characterized by the above-mentioned.

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