JP2010196775A - Piping structure and desulfurizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping structure and a desulfurizer capable of reducing abrasion in the connecting pipe part, being easily restorable, when a hole is opened in a connecting pipe part, and reducing a construction period and a cost burden. <P>SOLUTION: This piping structure has an upstream side piping part, a downstream side piping part arranged at a predetermined angle to the upstream side piping part in the vicinity of a lower end part of the upstream side piping part, and the connecting pipe part for connecting the upstream side piping part and the downstream side piping part, and makes fluid flow inside. In the piping structure, the connecting pipe part has a connecting pipe body, a projecting part projecting to the downstream side in the flow direction of the fluid on the inside of the upstream side piping part from the connecting pipe body, and a cover part detachably connected to the projecting part on the tip side of the projecting part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a piping structure in which a fluid flows inside, and a desulfurization apparatus using the piping structure.

  Depending on the installation environment of various apparatuses, it may be difficult to secure a sufficient space for installing the piping. In such a case, it is often the case that a pipe or duct having an angle with each other is bent and laid by using a connecting pipe portion such as an elbow member that is a connecting joint for branching and joining. FIG. 5 is a perspective view showing a general piping structure laid by bending. The elbow members 51a and 51b connect the two pipes. The elbow members 51a and 51b allow the piping structure to be bent and laid. However, in the case of a desulfurization device in which, for example, limestone slurry (a material in which a small amount of limestone that is gypsum and an absorbent is suspended or circulated) is circulated in the pipe, Due to the solid particles of the slurry, the inside may be worn away. The elbow members 51a and 51b will eventually be perforated as the wear progresses.

  As a conventional technique for reducing perforation due to wear of the elbow member (connection pipe part), for example, the techniques of Patent Document 1 and Patent Document 2 can be cited. In Patent Document 1, a technique for coating an undercoat film having excellent adhesion and anticorrosion properties on the inner and outer surfaces of a slurry transport pipe, etc., and coating a bituminous epoxy composition containing glass flakes thereon to improve the anticorrosion performance. It is disclosed. Further, in Patent Document 2, a method for manufacturing a pipe and a pipe joint having excellent wear resistance and impact resistance, in which the inner side of the pipe body requiring wear resistance is made of a metal-ceramic composite material and the outer side of the pipe body is made of a single metal. It is disclosed.

JP 56-134688 A JP-A 64-27762

  However, in the methods for reducing wear shown in Patent Documents 1 and 2, although the initial progress speed of wear is slightly slow, wear is similarly caused, and a failure due to peeling of the undercoat occurs, and permanent wear is prevented. It is not a countermeasure. In addition, when a hole is generated in the connecting piping part, it is not appropriate to repair the holed part from the piping structure because the work period and cost are large.

  The present invention can reduce the wear of the connection pipe part, and when the connection pipe part is perforated, it can be easily repaired. An object is to provide a structure and a desulfurization apparatus.

  (1) The present invention includes an upstream piping portion, a downstream piping portion disposed at a predetermined angle with respect to the upstream piping portion in the vicinity of a lower end portion of the upstream piping portion, and the upstream piping. A connecting pipe section that connects the pipe section and the downstream pipe section, and a fluid flows through the inside, wherein the connecting pipe section includes a connecting pipe body, and the upstream pipe from the connecting pipe body. The present invention relates to a piping structure comprising: a protruding portion that protrudes downstream in the fluid flow direction inside a portion; and a lid portion that is detachably connected to the protruding portion on the distal end side of the protruding portion.

  According to the piping structure of (1), since the connecting pipe part has the protruding part, the fluid flowing from the upstream side pipe part to the connecting pipe part decreases the flow velocity at the protruding part, and then the downstream side. It flows to the piping part. Therefore, since the pressure concerning a connection piping part can be suppressed, the wear of a connection piping part can be reduced. Moreover, since it has the cover part detachably connected with respect to the protrusion part on the front end side of the protrusion part, even if the cover part is worn by the fluid, it can be easily replaced in a short time.

  (2) The piping structure according to (1), wherein the upstream piping portion is arranged in a substantially vertical direction, and the protruding portion protrudes downward in the vertical direction.

  According to the piping structure of (2), even when the upstream piping portion is arranged in a substantially vertical direction and the flow of fluid is also affected by gravity and the flow velocity is increased, the connecting piping portion has a protruding portion. Therefore, the fluid that has flowed from the upstream side pipe portion to the connecting pipe portion flows to the downstream side pipe portion after the flow velocity is reduced at the protruding portion. Therefore, since the pressure concerning a connection piping part can be suppressed, the wear of a connection piping part can be reduced.

  (3) The present invention has a gas introduction part for introducing a sulfur-containing gas and a slurry introduction part for introducing a limestone slurry, and stores a gas-liquid contact device for bringing the sulfur-containing gas into contact with the limestone slurry, and the limestone slurry. A desulfurization device comprising a slurry reservoir, and a slurry supply pipe connecting the slurry reservoir and the gas-liquid contact device, wherein the slurry supply pipe includes an upstream pipe section and an upstream pipe section. A downstream piping portion disposed near the lower end portion with a predetermined angle with respect to the upstream piping portion, and a connecting piping portion that connects the upstream piping portion and the downstream piping portion, The connecting pipe portion includes a connecting pipe main body, a protruding portion protruding from the connecting pipe main body to the downstream side in the flow direction of the limestone slurry inside the upstream piping portion, and a protruding portion on the tip side of the protruding portion. Detachable A lid portion connected to the capacity a desulfurization apparatus having a.

  According to the desulfurization apparatus of (3), since the connecting pipe part includes the protruding part, the limestone slurry that has flowed from the upstream side pipe part to the connecting pipe part is reduced in speed after the flow rate is reduced in the protruding part. Flows to the side piping. Therefore, since the pressure concerning a connection piping part can be suppressed, the abrasion of the connection piping part by the solid particle of a limestone slurry can be reduced. Moreover, since it has the cover part detachably connected with respect to the protrusion part on the front end side of the protrusion part, even if the cover part is worn by the fluid, it can be easily replaced in a short time.

  (4) The present invention is the desulfurization apparatus according to (3), in which the upstream pipe portion is disposed in a substantially vertical direction, and the protruding portion protrudes downward in the vertical direction.

  According to the desulfurization apparatus of (4), even when the upstream piping portion is arranged in a substantially vertical direction and the flow of the limestone slurry is also affected by gravity and the flow velocity is increased, the connecting piping portion has a protruding portion. Therefore, the limestone slurry that has flowed from the upstream side pipe part to the connecting pipe part flows to the downstream side pipe part after decelerating the flow velocity at the protruding part. Therefore, since the pressure concerning a connection piping part can be suppressed, the abrasion of the connection piping part by the solid particle of a limestone slurry can be reduced.

  According to the piping structure and the desulfurization apparatus of the present invention, since the connecting pipe portion includes the protruding portion, the fluid flowing from the upstream side piping portion to the connecting piping portion is reduced in flow velocity at the protruding portion, It flows to the downstream piping section. Therefore, since the pressure concerning a connection piping part can be suppressed, the wear of a connection piping part can be reduced. Moreover, since it has the cover part detachably connected with respect to the protrusion part on the front end side of the protrusion part, even if the cover part is worn by the fluid, it can be easily replaced in a short time.

It is a top view which shows the piping structure which concerns on 1st embodiment of this invention. It is a front view which shows the piping structure which concerns on 2nd embodiment of this invention. It is a schematic diagram of the desulfurization apparatus which concerns on embodiment of this invention. It is a perspective view of the slurry supply piping of the desulfurization apparatus which concerns on embodiment of this invention. It is a perspective view which shows the piping structure laid by general bending.

  First, the piping structure of the present invention will be described. FIG. 1 is a plan view showing a piping structure 1a according to the first embodiment of the present invention. The piping structure 1 a includes an upstream piping portion 2, a downstream piping portion 3, and a connecting piping portion 4. The connecting piping part 4 connects the upstream piping part 2 and the downstream piping part 3. In the first embodiment of the present invention shown in FIG. 1, the upstream side piping part 2, the downstream side piping part 3, and the connecting piping part 4 are all connected in the horizontal direction. Therefore, the fluid flowing through the inside of the piping structure 1a flows in the horizontal direction from the upstream piping portion 2 through the connecting piping portion 4 to the downstream piping portion 3.

  The connecting pipe part 4 includes a connecting pipe body 5, a protruding part 6, and a lid part 7. The connection pipe main body 5 has an upstream side connection port 5a and a downstream side connection port 5b. The upstream side connection port 5 a connects the connection pipe part 4 and the upstream side pipe part 2. On the other hand, the downstream side connection port 5 b connects the connection pipe part 4 and the downstream side pipe part 3. The upstream side connection port 5a and the downstream side connection port 5b are provided at positions having a predetermined angle in the connection pipe portion 4. Therefore, the downstream side piping part 3 can be arranged at the predetermined angle with respect to the upstream side piping part 2 in the vicinity of the tip of the upstream side piping part 2. The size of the angle is arbitrarily determined by the operator depending on the installation environment. For example, FIG. 1 shows a state in which the magnitude of the angle is 90 degrees.

  The protruding part 6 protrudes from the connecting pipe main body 5 to the downstream side in the fluid flow direction (arrow a) inside the upstream side pipe part 2. The fluid (arrow b) that has flowed to the protrusion 6 changes its flow in the direction of the arrow c by the lid 7 and flows to the downstream pipe portion 3 in the direction of the arrow d. Here, in the protrusion 6, the fluid flow indicated by the arrow b is decelerated due to the fluid flow indicated by the arrow c. Therefore, since the speed of the fluid in the connection piping part 4 can be suppressed, the pressure by the fluid concerning the connection piping part 4 can be reduced.

  The lid part 7 is detachably connected to the projecting part 6 on the tip side of the projecting part 6. As a method for connecting the lid portion 7 and the protruding portion 6, a screw-type connection method can be exemplified. Due to the screw-in type, the connection between the lid portion 7 and the protruding portion 6 is difficult to disconnect due to the pressure generated when the fluid flows through the pipe. In addition, when replacing the lid portion 7, the worker can easily remove the lid portion 7 by rotating the lid portion 7 in a certain direction. Furthermore, the connection method of the cover part 7 and the protrusion part 6 may be accompanied by the connection method fixed with a screw in addition to the method of connecting by the screwing type. Since the lid portion 7 is located at the tip portion of the projecting portion 6, it is most susceptible to the pressure of the fluid flowing from the upstream side piping portion 2 and is likely to wear. Since the lid portion 7 is detachably connected to the protruding portion 6, when the lid portion 7 is worn, the lid portion 7 can be replaced easily and in a short time.

  Next, another embodiment of the piping structure according to the present invention will be described. FIG. 2 is a front view showing a piping structure 1b according to the second embodiment of the present invention. Similar to the piping structure shown in FIG. 1, the piping structure 1 b includes an upstream piping part 2, a downstream piping part 3, and a connecting piping part 4, and the connecting piping part 4 includes a connecting pipe body 5, a protruding part 6, And a lid 7. However, the upstream piping part 2 is arranged in a substantially vertical direction. Further, the protruding portion 6 protrudes downward in the vertical direction. When the upstream side piping part 2 is arranged in a substantially vertical direction, the fluid flowing through the upstream side piping part 2 (arrow a) has an influence of gravity, so that the flow velocity becomes faster than usual.

  However, in the piping structure 1b of the present invention, since the protrusion 6 is provided, the fluid speed can be suppressed. That is, the fluid (arrow b) that has flowed to the protruding portion 6 changes the flow in the direction of the arrow c by the lid portion 7 and flows to the downstream pipe portion 3 in the direction of the arrow d. The flow velocity of the fluid flow indicated by the arrow b is reduced by the presence of the fluid flow indicated by the arrow c. Therefore, by decelerating the speed of the fluid flowing through the connection pipe part 4, the pressure due to the fluid applied to the connection pipe part 4 can be reduced, and wear of the connection pipe part 4 can be reduced.

  In addition, the piping structures 1a and 1b according to the first and second embodiments of the present invention can be used in appropriate combination.

Next, the desulfurization apparatus 9 according to the present invention will be described. In the desulfurization apparatus 9, calcium sulfate (CaSO ₄ : gypsum) is generated by causing the following reactions (1) to (3), and desulfurization is performed from the sulfur-containing gas.
(1) SO ₂ + H ₂ O → H ⁺ + HSO ₃ ^{−
_{(2) H + + HSO 3}} - + 1 / 2O 2 → 2H + + SO 4 2-
(3) 2H ⁺ + SO ₄ ²⁻ + CaCO ₃ + H ₂ O → CaSO ₄ .2H ₂ O + CO ₂

In order to remove SO ₂ from the sulfur-containing gas by the desulfurization apparatus 9, a necessary amount of limestone slurry must be charged according to the concentration of SO ₂ . In a normal case, the input amount of the limestone slurry is determined based on the measurement result in the calcium carbonate concentration meter (pH meter).

  FIG. 3 is a schematic diagram of the desulfurization apparatus 9 according to the embodiment of the present invention. The desulfurization device 9 of the present invention includes a gas-liquid contact device 10, a slurry storage unit 20, and a slurry supply pipe 30. The slurry reservoir 20 stores limestone slurry. The limestone slurry stored in the slurry storage unit 20 passes through the slurry supply pipe 30 and is sent to the gas-liquid contact device 10. In the gas-liquid contact device 10, the limestone slurry and the sulfur-containing gas come into contact with each other, and calcium sulfate is generated.

  The gas-liquid contact device 10 includes a gas introduction unit 11 for introducing the sulfur-containing gas A, a gas deriving unit 12 for deriving the gas B after sulfur removal, a tank 13 to which limestone slurry sent from the slurry storage unit 20 is supplied, limestone It has an air supply means 14 for supplying air to the slurry, a mist eliminator 15 for collecting and removing entrained mist, and a slurry introducing portion 16 for introducing limestone slurry.

  The gas introduction part 11 extends upward from one side of the tank 13, and the sulfur-containing gas A flows downward. Further, the gas outlet 12 extends upward from the other side (right side in the figure) of the tank 13, and the gas passing through the gas inlet 11 and passing through the upper part of the tank 13 faces upward. It comes to flow. Further, a mist eliminator 15 is provided on the tank 13 side of the gas outlet 12. The mist collected by the mist eliminator 15 is directly returned into the tank 13 by, for example, dropping inside the gas outlet 12.

  The limestone slurry brought into contact with the sulfur-containing gas sent from the gas introduction unit 11 is contacted by the slurry introduction unit 16. The slurry introduction unit 16 includes a circulation pipe 16a, a supply header 16b, and a spray pipe 16c. The spray pipe 16c is formed with a plurality of spray nozzles 16d for injecting the lime water slurry upward in a liquid column shape. The lime water slurry in the tank 60 passes through the circulation pipe 16a, is sent to the spray pipe 16c via the supply header 16b, and is sprayed from each spray nozzle 16d.

  The spray pipe 16c is located on the gas introduction unit 11 side. Further, although not shown in detail, the spray pipe 16c is arranged in parallel in a plurality of regions in the entire lateral direction inside, and the other end side of the spray pipe 16c is provided at a plurality of locations in the longitudinal direction of the supply header 16b. It is connected.

  An air supply means 14 is provided in the tank 13. The limestone slurry blown up from the spray nozzle 16d flows down while absorbing sulfurous acid gas, and is oxidized by the air blown using the air supply means 14 to generate gypsum.

  The air supply means 14 shown in FIG. 3 is an arm rotation type, and an arm 14d that rotates horizontally by a motor (not shown) supported in the tank 13 using a hollow rotation shaft 14b, and a hollow rotation shaft 14b. And an air supply pipe 14c having an opening end extended below the arm 14d, and a rotary joint 14a for supplying the base end side of the hollow rotary shaft 14b to the air source. In this air supply means 14, the hollow rotary shaft 14b is rotated while pressurizing the air C from the rotary joint 14a, and the air C is supplied from the air supply pipe 14c to the gas phase region generated on the rear side in the rotation direction of the arm 14d. Furthermore, the vortex force generated by the rotation of the arm 14d causes a tearing phenomenon at the end of the gas phase region to generate a large number of substantially uniform fine bubbles, and the limestone slurry that has absorbed the sulfurous acid gas in the tank 13 and the air. It comes to contact efficiently.

  The limestone slurry in the tank 13 is sent to the dehydrator 17, filtered by the dehydrator 17, and taken out as gypsum with a low water content. On the other hand, the filtrate from the dehydrator 17 is sent to the slurry reservoir 20, limestone is added together with makeup water, flows again through the slurry supply pipe 30 as limestone slurry, and is supplied to the gas-liquid contact device 10.

  Here, the slurry supply pipe 30 will be described. FIG. 4 is a perspective view of the slurry supply pipe 30 of the desulfurization apparatus according to the embodiment of the present invention. The slurry supply piping 30 includes an upstream piping portion 32a, a downstream piping portion 33, and a connecting piping portion 34a. The downstream side piping part 33 is disposed at a predetermined angle with respect to the upstream side piping part 32a in the vicinity of the tip of the upstream side piping part 32a. The size of the predetermined angle is arbitrarily determined by the operator depending on the installation environment. For example, FIG. 4 shows a state where the angle is 90 degrees.

  The connecting piping part 34 a connects the upstream piping part 32 a and the downstream piping part 33. The connection piping part 34 is provided with the connection piping main body 35, the protrusion part 36a, and the cover part 37a. The protruding part 36a protrudes from the connecting pipe main body 35 to the downstream side in the flow direction of the limestone slurry in the upstream side pipe part 32a. The lid portion 37a is detachably connected to the protruding portion 36a on the distal end side of the protruding portion 36a.

  The limestone slurry contains a solid material. For this reason, the connecting pipe portion 34a is liable to be worn due to the contact of the solid material of the limestone slurry. However, since it has the protrusion part 36a, the flow rate of the limestone slurry flowing in the connecting pipe part 4 is reduced. That is, in the protrusion part 36a, the flow from the upstream piping part 32a and the flow of the direction opposite to the said flow are mixed. Therefore, in the protrusion 36a, the flow of the limestone slurry flowing from the upstream side piping part 32a is decelerated, so that the wear of the connecting pipe part 34a can be reduced.

  Further, in the connecting pipe portion 34a, a portion where the wear due to the flow of the limestone slurry tends to occur is a lid portion 37a. In the desulfurization apparatus of the present invention, since the lid portion 37a is detachably connected to the protruding portion 36a, when the lid portion 37a is worn, the lid portion 37a is easily and quickly replaced. be able to. In addition, as a connection method of the cover part 37a and the protrusion part 36a, the connection method by a screwing type can be illustrated. By being a screw-in type, the connection between the lid portion 37a and the protruding portion 36a is unlikely to come off due to the pressure generated when the limestone slurry flows through the pipe. In addition, when replacing the lid portion 37a, the operator can easily remove the lid portion 37a by rotating the lid portion 37a in a certain direction. Furthermore, the connection method of the cover part 37a and the protrusion part 36a may involve the connection method fixed with a screw in addition to the method of connecting by screwing type.

  Further, in the slurry supply pipe 30, the upstream pipe section can be arranged in a substantially vertical direction. In that case, the protruding portion protrudes downward in the vertical direction. The flow rate of the limestone slurry flowing in the upstream piping portion 32b arranged in the vertical direction is faster due to the influence of gravity compared to the flow rate in the horizontal direction. However, since it has the protrusion part 36b, as above-mentioned, the flow rate of the limestone slurry which flows through the inside of the connection piping part 34b is decelerated. Therefore, the wear of the connecting pipe part 34b can be reduced by the flow of the limestone slurry.

  Further, the lid portion 37b, which tends to be worn by the flow of the limestone slurry, is detachably connected to the protruding portion 36b. Therefore, when the lid portion 37b is worn, the lid portion 37b can be replaced easily and in a short time. In addition, as a connection method of the cover part 37b and the protrusion part 36b, in addition to the connection method by a screwing type and the method of connecting by a screwing type as mentioned above, the connection method fixed with a screw can be illustrated. .

  In addition, embodiment of this invention is not limited to said embodiment at all, and the technical scope of this invention is not limited to these. For example, in the above-described embodiment, the pipe structure of the present invention is applied to the slurry supply pipe 30 of the desulfurization apparatus, but is not limited thereto. That is, the pipe structure of the present invention includes a sewage water purifier mixed with solid matter, an agricultural water drainage facility for draining water from farmland, a mud drainage facility for discharging mud at a civil engineering work site, and ready-mixed concrete. You may apply to the mortar transport pipe equipment etc. which circulate.

1a, 1b Piping structure 2, 32a, 32b Upstream piping section 3, 33 Downstream piping section 4, 34a, 34b Connecting piping section 5, 35a, 35b Connecting piping main body 5a Upstream connecting port 5b Downstream connecting port 6, 36a , 36b Projection part 7, 37a, 37b Lid part 9 Desulfurization device 10 Gas-liquid contact device 11 Gas introduction part 12 Gas outlet part 13 Tank 14 Air supply means 14a Rotary joint 14b Hollow rotating shaft 14c Air supply pipe 14d Arm 15 Mist eliminator 16 Slurry introduction part 16a Circulation pipe 16b Supply header 16c Spray pipe 16d Spray nozzle 17 Dehydrator 20 Slurry storage part 30 Slurry supply pipe 51a, 51b Elbow member

Claims (4)

An upstream piping section, a downstream piping section disposed at a predetermined angle with respect to the upstream piping section in the vicinity of a lower end portion of the upstream piping section, the upstream piping section, and the downstream piping section And a piping structure in which a fluid circulates in the interior,
The connecting pipe section includes a connecting pipe body,
A projecting portion projecting from the connecting piping main body to the downstream side in the fluid flow direction inside the upstream piping portion;
A piping structure comprising: a lid portion detachably connected to the protruding portion on a distal end side of the protruding portion.   2. The piping structure according to claim 1, wherein the upstream piping portion is arranged in a substantially vertical direction, and the protruding portion protrudes downward in the vertical direction. A gas-liquid contact device that has a gas introduction part that introduces sulfur-containing gas and a slurry introduction part that introduces limestone slurry, contacts the sulfur-containing gas and limestone slurry, a slurry storage part that stores limestone slurry, and the slurry A slurry supply pipe connecting the reservoir and the gas-liquid contact device, and a desulfurization device comprising:
The slurry supply pipe includes an upstream pipe part, a downstream pipe part arranged at a predetermined angle with respect to the upstream pipe part in the vicinity of a lower end part of the upstream pipe part, and the upstream pipe part And a connecting piping part that connects the downstream piping part,
The connecting pipe portion includes a connecting pipe main body, a protruding portion protruding from the connecting pipe main body to the downstream side in the flow direction of the limestone slurry inside the upstream piping portion, and a protruding portion on the tip side of the protruding portion. A desulfurization apparatus comprising: a lid portion detachably connected to the lid portion.   The desulfurization apparatus according to claim 3, wherein the upstream pipe portion is disposed in a substantially vertical direction, and the protruding portion protrudes downward in the vertical direction.

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