JP6100020B2 - Scale collector, boiler equipped with the same, and scale collection method - Google Patents

Description

  The present invention relates to a scale collector suitable for use in, for example, a boiler power plant, a boiler equipped with the scale collector, and a scale collection method.

  In a boiler power plant where steam generated in the boiler is generated by a turbine, the oxidation peeled off from the boiler tube wall, etc. inside the steam pipe coming out of the superheater between the boiler and the turbine or the steam pipe coming out of the reheater When scales such as iron are mixed, the turbine blades are worn by the scales, and there is a possibility that the turbine performance is lowered, the reliability of the piping equipment is lowered due to wear of the drain line, and other equipment is affected.

  In the conventional scale collector that collects the scale in the steam pipe, a horizontal pipe is branched from the vertical descending pipe of the steam pipe from the boiler, and a scale collecting part is provided at the bottom of the vertical descending pipe. The scale was removed.

  The following patent documents 1 and 2 are disclosed as countermeasures for troubles caused by mixing of scale into steam.

  Patent Document 1 discloses that a baffle plate is provided in a tubular pocket provided on the extension beyond the horizontal branch point of the vertical downcomer to prevent swirling flow in the pocket, and the scale is efficiently placed in the pocket. A method of separation is shown.

  Patent Document 2 includes a branch portion communicating with the bent portion, and a pocket portion forming a collection space below the branch portion, and at least one of the upstream side and the downstream side of the steam pipe communicating with the branch portion. Since the steam cross-sectional area enlargement portion of the steam mainstream is provided, a boiler steam pipe scale collecting device that can reduce the flow velocity of the steam mainstream by an amount corresponding to the increase in the flow path area is shown.

JP 2000-257403 A JP 2008-215098 A

  However, in the technique disclosed in Patent Document 1, there is a possibility that the scale discharge valve / drain valve provided at the lower portion of the scale depositing portion may be bitten by the scale.

  Further, Patent Document 2 discloses that a partition plate is provided in a collecting portion of a vertical scale collector. However, since the scale is discharged at the same time, the drain pipe may be clogged.

  The present invention has been made in view of such circumstances, and includes a scale collector capable of separating a scale mixed in a steam pipe with a simple structure and preventing a turbine trouble, and the same. It aims at providing a boiler and a scale collection method.

In order to solve the above problems, the scale collector of the present invention, the boiler equipped with the scale collector, and the scale collection method employ the following means.
The scale collector according to the present invention is a scale collector that is provided in a steam pipe through which steam circulates and collects the scale, and includes a steam inlet part that guides the steam from the horizontal direction, and a steam inlet part that guides the steam from the steam inlet part. A collecting portion that is provided on an extension line in the flow direction and collects the scale by damming the vapor, and a direction that is provided between the vapor inlet portion and the collecting portion and is turned with respect to the extension line. And a steam outlet for allowing steam to flow out, and is provided in a crossover pipe connecting the steam pipes provided in parallel .
Further, in the scale collector according to the present invention, the scale collector is provided in a steam pipe through which steam flows and collects the scale, the steam inlet part for guiding the steam from the horizontal direction, and led from the steam inlet part Provided on an extension line in the direction of the flow of steam to stop the steam and collect the scale; provided between the steam inlet part and the collection part; A steam outlet for allowing steam to flow in the direction of turning, and the collection unit is provided with a backflow prevention unit for preventing backflow of the collected scale, and a lower end of the backflow prevention unit (steam upstream) The side) is provided with a penetrating portion for draining.

The collection part is provided on the extension line | wire of the flow direction of the vapor | steam guide | induced from the steam inlet part. Since the collecting part is provided at the place where the steam is blocked, the scale mixed in the steam is collected by the collecting part by inertia force. In addition, the scale is not collected by guiding the steam downward as in the past, but the scale is collected at the collecting section by guiding the steam from the horizontal direction, thus preventing drain water from accumulating in the collecting section. can do. On the other hand, since the steam outlet portion is provided in the direction of turning with respect to the extension line of the steam inflow direction, the scale mixed in the steam does not flow to the steam outlet portion, but mainly the steam is the steam outlet portion. Taken from. As described above, since the steam is guided in the horizontal direction and the scale is collected by the collecting portion, the steam is discharged from the steam outlet portion, so that the drain water does not stay in the collecting portion. Therefore, the scale can be separated with a simple structure without allowing the scale to coexist with drain water as much as possible.
Moreover, a scale collector can be provided also as a crossover pipe connecting the steam pipes. Thereby, space saving of a steam pipe installation can be achieved.
Moreover, by providing the backflow prevention part in the collection part, it is possible to prevent the collected scale from flowing back to the steam inlet part side. The backflow prevention unit has, for example, a cone shape (cone shape).
Further, a penetrating part for removing steam drainage is provided at the lower end of the cone-shaped backflow preventing part. Thereby, the drain accumulated at the lower end of the cone shape can be removed from the through portion.

  Furthermore, the scale collector according to the present invention includes a steam outlet pipe connected to the steam outlet part, and the steam outlet pipe is provided with a drain part for discharging condensed water.

  By providing the drain part in the steam outlet pipe, the scale is removed on the upstream side of the outlet pipe, so there is no possibility that the scale is mixed into the drain part. Thereby, there is no possibility that a scale will stick to the drain valve of a drain part. Moreover, there is no possibility that the drain line is worn by the scale.

  Further, in the scale collector according to the present invention, the collection unit is provided with a lid that can be removed when discharging the collected scale and can be sealed when collecting the scale. It is characterized by.

  Since the collection unit is provided with a lid that can be hermetically sealed when collecting the scale, it is possible to maintain the vapor sealing performance during operation. Moreover, since the lid body can be removed in a state where there is no pressure due to steam such as when the operation is stopped, the collected scale can be easily taken out.

  Furthermore, in the scale collector according to the present invention, the scale pipe according to the present invention is characterized in that the steam pipe extending in the horizontal direction is connected to the vicinity of the lower joint portion corresponding to the upstream side of the steam in the rising pipe that rises in the vertical direction. To do.

  Since it is possible to connect the scale collector using the joint portion with the rising pipe, it is possible to facilitate the installation work and to save the space of the steam pipe facility.

  Furthermore, the scale collector according to the present invention is characterized in that the collecting section is provided with a steam passage for returning the steam to the steam outlet section.

  The steam passage for returning the steam from the collection section to the steam outlet section is a warming steam path. The steam flowing in from the steam inlet portion flows through the warming steam passage and is returned to the steam outlet portion. Thereby, since a vapor | steam distribute | circulates in a collection part, the temperature of a vapor | steam can be kept at a temperature higher than predetermined value. Therefore, it is possible to prevent the generation of drain due to the temperature drop of the steam.

  Furthermore, the scale collector according to the present invention is characterized in that the collection unit is provided with an on-off valve for discharging the collected scale.

  By providing an opening / closing valve for discharging the collected scale in the collection portion, the scale can be removed by performing an opening operation of the opening / closing valve.

  Furthermore, the boiler according to the present invention includes a boiler body, a steam pipe that guides steam generated in the boiler body to the turbine, and a scale collector provided in the steam pipe. .

  By providing a scale collector in the steam pipe, measures such as cleaning the inside of the pipe with chemicals or cutting the pipe to clean it are unnecessary. Thereby, there is no possibility of causing the trouble of the turbine or the drain line due to the influence of the scale in the steam pipe.

Furthermore, the scale collection method according to the present invention, there is provided a scale collection method for collecting fraud and mitigating risk scale crossover pipe connecting the steam pipe each other is provided in parallel to the steam flows from the horizontal direction A step of guiding the steam to the steam inlet portion, a step of collecting the scale by blocking the steam at a collecting portion provided on an extension line in the flow direction of the steam led from the steam inlet portion, and the extension And a step of causing the steam to flow out to a steam outlet provided between the steam inlet and the collector in a direction turning with respect to the line.
Further, in the scale collecting method according to the present invention, the scale collecting method is provided in a steam pipe through which the steam flows and collects the scale, the step of introducing the steam from the horizontal direction to the steam inlet, and the steam A step of collecting the scale by damming the steam with a collecting portion provided on an extension line in a flow direction of the steam led from the inlet portion, and the steam inlet portion in a direction turning with respect to the extension line And a step of causing the steam to flow out to a steam outlet provided between the collecting unit, a step of preventing backflow of the scale collected by a backflow preventing unit provided in the collecting unit, And a step of removing drainage by a through part provided at the lower end of the backflow prevention part.

By using these steps, the scale in the vapor can be removed with a simpler structure. Further, space saving of the steam pipe facility can be achieved. Moreover, it is possible to prevent the collected scale from flowing back to the steam inlet side. Further, the drain accumulated at the lower end of the cone shape can be removed from the through portion.

According to the present invention, since the scale collector is provided with the collecting portion on the extension line in the flow direction of the steam guided in the horizontal direction from the steam inlet portion, the scale mixed in the steam is drained with a simple structure. It can be removed without coexisting with water.
Moreover, since the scale in the steam is collected by the scale collector, it is possible to prevent the trouble of the turbine and the drain line due to the scale mixing in the steam.

It is the perspective view which showed 1st Embodiment of the scale collector which concerns on this invention. It is side sectional drawing which showed schematic structure of the scale collector of this invention. It is the perspective view which showed 2nd Embodiment of the scale collector which concerns on this invention. It is the figure which showed the position of the whole figure of a boiler power plant, and the scale collector of this invention. It is the perspective view which showed 3rd Embodiment of the scale collector which concerns on this invention. It is the sectional side view which showed 4th Embodiment of the scale collector which concerns on this invention. It is the sectional side view which showed 4th Embodiment of the scale collector which concerns on this invention. It is the sectional side view which showed 5th Embodiment of the scale collector which concerns on this invention.

Hereinafter, embodiments of a scale collector, a boiler equipped with the scale collector, and a scale collection method according to the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 4 shows an example of a boiler power plant describing the arrangement of the scale collector of the present invention.
The boiler power plant 23 of the present embodiment is a combination of a steam turbine 26 and a boiler 24 having a superheater 29 and a reheater 30 including a steam generator 25, a primary superheater 29a and a final superheater 29b. It is. The steam turbine 26 includes a high-pressure turbine 26 a, an intermediate-pressure turbine 26 b, and a low-pressure turbine 26 c, and drives the generator 28 via the output shaft 27 using the energy of the steam generated in the boiler 24.
As shown in FIG. 4, the steam inlet of the high-pressure turbine 26 a is connected to a superheater 29 having a superheater outlet header 3 through which steam joins the outlet side of the boiler 24 via a main steam pipe 31, Steam heated by the superheater 29 is supplied to the turbine 26a as a drive source. In addition, the steam that has lost its energy due to expansion in the high-pressure turbine 26 a is returned to the reheater 30 of the boiler 24 via the low-temperature reheat steam pipe 32. The steam reheated by the reheater 30 is supplied from the reheater outlet header 34 where the steam on the outlet side of the reheater 30 joins to the intermediate pressure turbine 26b via the high temperature reheat steam pipe 33. The steam that has lost its energy due to expansion in the intermediate pressure turbine 26b is supplied to the low pressure turbine 26c.
As shown in FIG. 4, the scale collector 4 of the present invention is provided in the main steam pipe 31 and the high-temperature reheat steam pipe 33, and provided on the downstream side near the steam turbine 26 with respect to the steam turbine. Further preferred.
FIG. 1 shows a first embodiment of the scale collector of the present invention.
As shown in FIG. 1, a superheater outlet header 3 is provided where steam generated by the boiler body 25 and superheated by the superheater 29 merges. The superheater outlet header 3 is provided with a plurality of superheater tube outlets 3a. From these superheater tube outlets 3a, the superheated steam is supplied from the first system steam pipe 1 and the second system steam pipe of the main steam pipe 31. It is divided into two uniformly. The first system steam pipe 1 and the second system steam pipe 2 are respectively connected to the steam turbine 26 and supply steam to the steam turbine 26.

Each of the first system steam pipe 1 and the second system steam pipe 2 is provided with a horizontal pipe path extending in the horizontal direction, and a scale collector 4a is provided in the middle of the horizontal pipe path.
Steam outlet pipes 21 and 22 for discharging steam from the scale collector 4a are connected in a direction (orthogonal direction in the present embodiment) that is turned with respect to the extension line of the steam toward the scale collector 4a. Each of the steam outlet pipes 21 and 22 is provided with drain portions 8 and 9, and each drain portion 8 and 9 is provided with a drain water extraction valve 8a and a valve 9a.

FIG. 2 shows a schematic configuration of the scale collector 4a.
On the upstream side of the scale collector 4a, there is provided a steam inlet portion 19 that guides the steam from the horizontal direction. A collecting part 18 is provided on an extension line in the flow direction of the steam 17 guided from the steam inlet part 19. The collection unit 18 is provided at a location where the steam 17 is blocked. The collected scale 16 is deposited on the bottom of the collecting unit 18.
A steam outlet 10 is provided between the steam inlet 19 and the collector 18. The steam outlet 10 is opened so as to guide the steam in a direction orthogonal to the flow of steam flowing in from the steam inlet 19.

  On the upper part of the collecting part 18, a lid 12 that can be detached is provided. The lid 12 can be removed when the collected scale 16 is discharged, and can be sealed when the scale 16 is collected.

  A gasket 13, a spacer ring 14, and a split ring 15 are provided around the lid 12 and are hermetically sealed by these configurations. The gasket 13, the spacer ring 14, and the split ring 15 are urged and sealed by the pressure of the steam 17 during operation. Further, the lid body 12 is fixed by a fixing tool so that the outer surface (the upper surface in FIG. 3) of the lid body 12 is covered with the cover plate 11. The lid 12 can be removed by removing the cover plate 11 and the like while there is no pressure due to the steam 17 when the operation is stopped and the temperature is low.

Next, the operation of the scale collector having the above configuration and the boiler including the scale collector will be described.
As shown in FIG. 1, the steam generated in the boiler body 25 and superheated by the superheater 29 is connected to the first system steam pipe 1 and the first steam pipe 3 from each superheater outlet 3 a of the superheater outlet header 3. It flows divided into two lines of steam piping 2.

  As shown in FIG. 2, the steam 17 flowing into each steam pipe flows from the horizontal direction into the scale collector 4 a through the steam inlet 19. The steam 17 guided in the horizontal direction from the steam inlet portion 19 flows toward the collection portion 18 provided on the extension line in the flow direction. In the collection unit 18, the steam 17 is blocked and the scale 16 is collected. The steam 17 from which the scale 16 has been removed is turned from the steam outlet portion 10 provided between the steam inlet portion 19 and the collecting portion 18 in a direction orthogonal to the steam inflow direction to the outside of the scale collector 4a. It is guided.

  As shown in FIG. 1, the steam flowing out from the steam outlet portion 10 flows through the steam outlet pipes 21 and 22 connected to the steam outlet portion 10. The steam flowing through the steam outlet pipes 21 and 22 is supplied to the steam turbine 26 after passing through the upper portions of the system drain parts 8 and 9 before the steam is supplied to the steam turbine 26. Steam drain water is collected in the drain portions 8 and 9 of each system. The drain water that has flowed to the drain portions 8 and 9 of each system is discharged from the drain water extraction valves 8a and 9a.

According to this embodiment, there exist the following effects.
As shown in FIG. 2, since the collecting unit 18 is provided at a place where the steam 17 is blocked, the scale 16 mixed in the steam 17 is collected by the collecting unit 18 by inertia force. It will be. Moreover, since the vapor | steam 17 is guide | induced from the horizontal direction and the scale 16 is collected by the collection part 18, it can prevent that drain water accumulates in the collection part 18. FIG.

  On the other hand, since the steam outlet portion 10 is provided in a direction turning with respect to an extension line of the inflow direction of the steam 17, the scale mixed in the steam 17 mainly flows into the steam 17 without flowing into the steam outlet portion 10. Only from the steam outlet 10. As described above, the steam 17 is guided in the horizontal direction and the scale 16 is collected by the collecting unit 18, while the steam 17 is discharged from the steam outlet unit 10, so that the drain water is collected in the collecting unit 18. There is no stagnation. Therefore, the scale 16 can be separated with a simple structure without causing the scale 16 to coexist with drain water as much as possible.

  Since the drain water of the steam 17 and the scale 16 can be separated, the drain water discharge valves 8a and 9a can prevent the scale 16 from being caught and the drain lines 8, 9, 8b and 9b from being generated.

  Further, by installing the scale collector 4a in the vicinity of the steam supply port of the steam turbine 26, it is possible to supply steam that does not include the scale generated from the piping to the turbine.

  Thereby, a possibility that a scale may arise in piping which connects the steam turbine 26 and the scale collector 4a can be reduced. In addition, by providing the scale collector 4 near the steam supply port to the turbine, the turbine blades and the scale 16 collide with each other, and the turbine performance deteriorates such as blade wear, and the reliability of the piping equipment decreases due to drain line wear. And there is no risk of affecting other equipment problems.

Further, the lid 12 shown in FIG. 2 can be removed in a state where there is no pressure by the steam 17 such as when the operation is stopped. Work such as cutting the pipe to clean it is not necessary, and it is possible to easily remove the scale 16 inside the pipe.
In addition, although the present Example has described about the main steam pipe 31 of the superheater 29, it is applicable similarly in the high temperature reheat steam pipe 33 of the reheater 30, for example.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
The scale collector 4b of this embodiment can be used also as the crossover tube 20. Moreover, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment, and the description is abbreviate | omitted.
As shown in FIG. 3, the middle position 21 a of the steam outlet pipe 21 connected to the downstream side of the scale collector 4 b provided in the first system steam pipe 1 and the second system steam pipe 2 are provided. A crossover pipe 20 is provided so as to connect to the midway position 22a of the outlet pipe 22 connected to the downstream side of the scale collector 4b. This crossover pipe 20 makes the steam pressure of the outlet pipe 21 and the outlet pipe 22 uniform, and makes the steam pressure supplied to the turbine constant.
The steam outlet of the scale collector 4b provided in each of the first system steam pipe 1 and the second system steam pipe 2 is directed to the counterpart steam pipes 1 and 2. Therefore, the steam outlet pipe 21 connected to the steam outlet of the scale collector 4b of the first system steam pipe 1 extends toward the second system steam pipe 2 and then bends in a direction along the second system steam pipe 2. It is done. Similarly, the steam outlet pipe 22 connected to the steam outlet of the scale collector 4b of the second system steam pipe 2 extends toward the first system steam pipe 1 and then extends in a direction along the first system steam pipe 1. Bend. Thus, since the steam outlet pipes 21 and 22 can be brought close to each other, the crossover pipe 20 can be shortened, and the scale collector 4b between the first system steam pipe 1 and the second system steam pipe 2 can be shortened. And a crossover pipe | tube can be arrange | positioned compactly.

  Thus, according to the present embodiment, it is possible to install the scale collector 4b that also serves as the crossover pipe 20, so that the space for the steam piping facility can be saved.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG.
The scale collector 4c of the present embodiment is provided at a location (in the vicinity of the lower joint portion) that rises in the upward direction including the vertical from the horizontal portion of the steam pipe. The same reference numerals are given to the same components as those of the other embodiments, and the description thereof is omitted.
As shown in FIG. 5, the first system steam pipe 1 and the second steam pipe 2 are provided with rising pipes 40 that raise the steam pipes extending in the horizontal direction in the upward direction including the vertical direction. Yes. The rising pipe 40 turns the steam flowing in the horizontal direction to the vertical direction. The scale collector 4c of this embodiment is provided in the vicinity of the lower joint portion connected to the upstream side of the steam 17 of the rising pipe 40 so as to be substantially horizontal with the steam pipe extending in the horizontal direction.

  According to the present embodiment, it is possible to install the scale collector 4c by using the joint portion with the rising pipe 40 that turns the steam flow from the horizontal direction. Space saving of equipment can be achieved. Moreover, since it is not necessary to newly install new piping, cost can be reduced.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIGS.
The scale collectors 4d and 4e of the present embodiment are provided with a cone-shaped backflow prevention unit 41 (backflow prevention cone) in order to prevent the scale 16 from backflowing. The same reference numerals are given to the same components as those of the other embodiments, and the description thereof is omitted.
As shown in FIG. 6, a steam inlet 19 that guides steam from the horizontal direction is provided on the upstream side of the scale collector 4 d. A collecting part 18 is provided on an extension line in the flow direction of the steam 17 guided from the steam inlet part 19. A backflow prevention cone 41 is provided at a connection point between the collection unit 18 and the steam inlet unit 19. The shape of the backflow prevention cone 41 is narrower from the steam inlet portion 19 toward the collecting portion 18, and the cross-sectional area of the opening of the backflow prevention cone 41 is smaller than the cross-sectional area on the steam inlet portion 19 side. The steam 17 flowing through the collection unit 18 passes through the backflow prevention cone 41 and is blocked by the collection unit 18. The scale contained in the dammed steam 17 contacts the backflow prevention cone 41 and the like and accumulates at the bottom of the collecting unit 18. However, even if it is suspended again in the flow of the steam 17, it contacts the backflow prevention cone 41. Therefore, the conveyance is hindered, and it is difficult to flow backward from the collection part 18 to the steam inlet part 19 side. The backflow prevention cone is thus set at an inclination angle for suppressing re-carrying out from the collection part 18, and is preferably inclined at 20 ° to 60 ° from the horizontal direction toward the central axis of the pipe. More preferably, it is inclined 30 ° to 45 ° from the horizontal direction toward the central axis of the pipe. The ratio of the opening area of the backflow prevention cone 41 to the opening area of the collecting portion 18 is 50% or more and 80% or less. When this inclination is small or the opening area ratio is 80% or more, the floating scale is less effective in suppressing re-export from the collection unit 18. Further, if this inclination is large or the opening area ratio is large, the vapor 17 is contacted / damped by the backflow prevention cone 41 and scale is deposited outside the collecting portion 18, which is not preferable. Further, a through-portion 41a for extracting the drain of the steam 17 is provided at the lower end (upstream side of the steam) of the backflow prevention cone 41. When drainage of the steam 17 occurs, it is provided at the lower end of the backflow prevention cone 41. The drain is discharged from the penetrating part 41a to the collecting part 18 side. Further, as shown in FIG. 7, the scale collector 4e is connected to the vicinity of the lower joint portion on the upstream side of the steam of the rising pipe that causes the steam pipe extending in the horizontal direction to rise in the vertical direction. May be.

  According to the present embodiment, the backflow prevention cone 41 is provided at the connection point between the steam inlet portion 19 and the collection portion 18. Thereby, it can prevent that the scale 16 of the collection part 18 flows backward to the steam inlet part 19 side. In addition, when the steam 17 flowing into the collection unit 18 is started and drainage is generated while the temperature inside the collection unit 18 is low, the backflow prevention cone 41 should not be an obstacle to drain discharge. Is preferred. By providing the through portion 41 a in the vicinity of the pipe connection portion of the backflow prevention cone 41, the drain can be discharged without accumulating.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described with reference to FIG.
The scale collector 4f of the present embodiment is provided with a steam worm line 43 in order to prevent the drainage from being generated in the collection unit 18. The same reference numerals are given to the same components as those of the other embodiments, and the description thereof is omitted.
The scale collector 4f of the present embodiment is provided in the vicinity of the lower joint portion connected to the upstream side of the steam 17 of the rising pipe 40 so as to be horizontal with the horizontally extending steam pipe. As shown in FIG. 8, the collecting unit 18 is provided with a steam passage 43 (steam warm line) for returning the steam 17 to the steam pipe serving as the steam outlet 10. For example, the steam worm line 43 is provided with an inlet at an upper portion in the vertical direction where the steam 17 is dammed, and the outlet where the steam worm line 43 joins into the steam outlet 10 is the outlet. The steam worm line 43 that returns the steam 17 from the collecting unit 18 to the steam outlet unit 10 is configured to connect the collecting unit 18 when the piping temperature at the time of start-up is cold, when venting to the steam turbine, or during load operation. It is a warming steam passage for warming. The steam passage 43 (steam worm line) has a pipe diameter selected so that a small flow rate of steam flows, but the warming steam is circulated only when an on-off valve is provided in the middle to warm the collecting section 18. You may do it.

  The steam 17 that has flowed into the collection unit 18 from the steam inlet 19 flows through the steam worm line 43 and is returned to the steam outlet 10. Further, the opening / closing operation of the opening / closing valve 42 is performed by turning the handle 42a of the opening / closing valve 42 when the steam 17 is stopped.

  According to this embodiment, when the pipe temperature at the time of start-up is cold, when the steam is vented to the steam turbine, or during load operation, the steam 17 flows through the collection unit 18. It can be kept at a temperature higher than a predetermined value. Therefore, it is possible to prevent damage to the pipe due to a drain attack or the like caused by the drain generated due to the temperature drop of the steam 17 in the collection unit 18. Further, the scale 16 can be discharged by performing an opening / closing operation of the opening / closing valve 42. Thereby, the scale 16 can be removed with a simpler structure.

DESCRIPTION OF SYMBOLS 1 1st system steam piping 2 2nd system steam piping 3 Superheater outlet header 3a Superheater outlet 4 Scale collector 4a Scale collector (1st Embodiment)
4b Scale collector (second embodiment)
4c scale collector (third embodiment)
4d scale collector (fourth embodiment)
4e Scale collector (fourth embodiment)
4f scale collector (fifth embodiment)
8 1st system drain part 8a 1st system drain water extraction valve 9 2nd system drain part 9a 2nd system drain water extraction valve 10 Steam outlet part 11 Cover plate 12 Cover body 13 Gasket 14 Spacer ring 15 Split ring 16 Scale 17 Steam 18 Collecting part 19 Steam inlet part 20 Crossover pipes 21, 22 Steam outlet pipes 21a, 22a Midway position 23 Boiler power plant 24 Boiler 25 Boiler body 26 Steam turbine 28 Generator 29 Superheater 30 Reheater 31 Main steam pipe 33 High temperature reheat steam pipe 34 Reheater outlet header 40 Rise pipe 41 Backflow prevention part (backflow prevention cone)
41a Penetration part 42 On-off valve 42a Handle 43 Steam passage (steam worm line)

Claims (10)

A scale collector that is provided in a steam pipe through which steam flows and collects the scale,
A steam inlet for directing steam from the horizontal direction;
A collecting unit for collecting the scale dammed care the evaporated provided the steam inlet on the extension of the guided flow direction of the steam from,
A steam outlet portion provided between the steam inlet portion and the collecting portion, and for causing the steam to flow out in a direction of turning with respect to the extension line;
Equipped with a,
A scale collector characterized by being provided in a crossover pipe connecting the steam pipes provided in parallel . A scale collector that is provided in a steam pipe through which steam flows and collects the scale,
A steam inlet for directing steam from the horizontal direction;
A collecting unit for collecting the scale dammed care the evaporated provided the steam inlet on the extension of the guided flow direction of the steam from,
A steam outlet portion provided between the steam inlet portion and the collecting portion, and for causing the steam to flow out in a direction of turning with respect to the extension line;
Equipped with a,
The collection unit is provided with a backflow prevention unit for preventing backflow of the collected scale.
The scale collector according to claim 1, wherein a through-hole for removing a drain is provided at a lower end of the backflow prevention portion . Comprising a steam outlet pipe connected to the steam outlet portion;
The scale collector according to claim 1 or 2 , wherein the steam outlet pipe is provided with a drain portion for discharging condensed water. 2. The cover is provided with a lid that can be removed when discharging the collected scale and can be sealed when collecting the scale. The scale collector according to claim 3 . The scale collector according to any one of claims 1 to 4 , wherein the scale collector is connected in the vicinity of a lower joint portion on the upstream side of the steam of a rising pipe that causes the steam pipe extending in a horizontal direction to rise in a vertical direction. Wherein the collecting unit, the scale collector according to any one of claims 1 to claim 5, characterized in that the steam passage for returning the vapor to the vapor outlet is provided. Wherein the collecting unit, the scale collector according to claim 1 or we claim 6, characterized in that the opening and closing valve for discharging the collected scale is provided. Boiler body,
Steam piping for guiding steam generated in the boiler body to the turbine;
The scale collector according to any one of claims 1 to 7 , which is provided in the steam pipe,
The boiler characterized by having. Oite the crossover pipe connecting the steam pipe each other is provided in parallel to the steam flows, a scale collection method for collecting the scale,
A step of introducing steam from the horizontal direction to the steam inlet,
A step of collecting the scale by damming the steam at a collecting portion provided on an extension line in the flow direction of the steam guided from the steam inlet; and
A step of causing the steam to flow out to a steam outlet provided between the steam inlet and the collector in a direction turning with respect to the extension line;
A scale collecting method comprising: A scale collecting method for collecting scale, provided in a steam pipe through which steam flows,
A step of introducing steam from the horizontal direction to the steam inlet,
A step of collecting the scale by damming the steam at a collecting portion provided on an extension line in the flow direction of the steam guided from the steam inlet; and
A step of causing the steam to flow out to a steam outlet provided between the steam inlet and the collector in a direction turning with respect to the extension line;
A step of preventing backflow of the scale collected by a backflow prevention unit provided in the collection unit;
A step of draining by a through portion provided at a lower end of the backflow prevention portion;
A scale collecting method comprising:

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