JPH0579201U - Heat recovery boiler equipment - Google Patents

Abstract

(57) [Summary] [Structure] A mounting member 11 that is attachable to and detachable from the main body 1 that forms the gas path 2, a heating tube 12 that penetrates the upper and lower portions of the mounting member 11 and meanders inside the mounting member 11, and a mounting member.
First header tube 1 to which one end of superheated tube 12 is connected outside 11
3, the second header pipe 14 to which the other end is connected to form a vertically and horizontally symmetrical superheater unit body 10, and a plurality of superheater unit bodies 10 are detachably attached to the main body 1 separately. Recovery boiler equipment. [Effect] The replacement work can be performed easily by using the superheater unit as a unit and significantly shortening the construction period. The amount of incineration can be secured by drastically shortening the operation period (construction period) of the incinerator. Pull out the symmetrical superheater unit body
It can be used by inserting it again after rotating 180 degrees, extending the service life of one superheater unit.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat recovery boiler facility used, for example, in a furnace for incinerating municipal solid waste and industrial waste.

[0002]

[Prior Art]

 Conventionally, superheaters in heat recovery boiler facilities of this type are planned to use steam at relatively low temperatures due to concerns over high temperature corrosion. On the other hand, recently, from the standpoint of effective use of energy, higher temperatures have been required. In this case, the problem of high temperature corrosion of the superheater may occur due to hydrogen chloride gas, and it is expected that replacement work will increase.

[0003]

[Problems to be solved by the device]

 However, in the case of conventional superheaters in heat recovery boiler equipment, the replacement work is large because the structure of the superheater is one-piece and large in size, and since the heavy superheater is handled, the replacement work period is long. It becomes longer and the incinerator cannot be operated during the construction period, which causes a problem that the amount of incineration decreases. Also, the superheater tube of the superheater had a larger amount of corrosion (thinning amount) on the lower surface side than on the upper surface side, and the entire service life was short because all the replacement was performed due to the corrosion on the lower surface side. .

An object of the present invention is to provide a heat recovery boiler facility that can be easily replaced in a short period of time and can prolong the service life of a superheated tube.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the heat recovery boiler equipment of the present invention has a rectangular plate-shaped mounting member that is detachably attached to the main body side that forms a gas path, and has an end that penetrates the upper and lower portions of the mounting member and an intermediate portion. Symmetrical overheating due to the superheating tube group meandering inside the mounting member, the first header tube connected to one end of the heating tube group outside the mounting member, and the second header tube connected to the other end A heater unit body is formed, and a plurality of the superheater unit bodies are detachably attached to the main body.

[0006]

[Action]

 According to the structure of the present invention, operation can be performed by setting a plurality of superheater unit bodies, fixing the mounting member to the main body, and connecting both header pipes to the corresponding connecting pipes. That is, at the time of operation, steam is supplied from the connecting pipe to the superheat pipe through the first header pipe, and this steam gradually flows downward while meandering in the superheat pipe. At this time, the gas is flowing from the lower part to the upper part in the gas path, and this gas heats the superheated tube, so that the temperature of the steam is raised. The steam thus heated flows to the connecting pipe through the second header pipe.

During the course of use during such operation, the superheated pipe must be replaced when it corrodes. This replacement first separates both header pipes of the target superheater unit body and the corresponding connecting pipes. Next, after detaching the mounting member from the main body, the superheater unit body is pulled out from the main body. Then, a new superheater unit body can be inserted into the pulled-out mark, the mounting member can be fixed to the main body, and both header pipes can be connected to the connecting pipe.

In one superheater unit body, when the lower surface side of the superheater pipe has a larger corrosion amount than the upper surface side, the extracted superheater unit body is rotated 180 degrees as described above, and This superheater unit body may be inserted and then fixed, which extends the service life of one superheater unit body.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a main body such as an incinerator that forms a gas path 2, in which a corrosive gas 3 flows from the bottom to the top in the gas path 2. A laterally long elongated through portion 4 is formed at a predetermined location on one side wall of the main body 1, and a plurality of superheater unit bodies 10 are detachably attached to the main body 1 through the through portion 4. ing.

That is, the superheater unit body 10 has a rectangular plate-shaped mounting member 11 and both ends of the mounting member 11, which are divided into an upper portion and a lower portion of the mounting member 11 and penetrate therethrough, and an intermediate portion meanders inside the mounting member 11. And a heating tube 12. Here, a number of superheated tubes 12 are arranged in parallel in the lateral direction.

A first header pipe 13 for connecting one end of the superheat pipes 12 is provided in the lateral direction on the outer side of the mounting member 11, and the first header pipe 13 is located at the central portion in the lateral direction. The connecting pipe portion 13A is connected to the outside to form a T-shaped pipe. A second header pipe 14 that connects the other ends of the superheat pipes 12 is provided in the lateral direction at the outer side of the mounting member 11 and the second header pipe 14 also extends outward from the lateral central portion. The connecting pipe portion 14A is connected to form a T-shaped pipe. A plurality of bolt holes 15 are formed on the outer edge of the mounting member 11. By the above 11 to 15, the superheater unit body 10 having a symmetrical shape in the vertical and horizontal directions is formed.

In the superheater unit body 10 configured as described above, the meandering portion of the superheater tube 12 is placed in the gas path 2 through the penetrating portion 4, and the outer edge of the mounting member 11 is brought into contact with the main body 1. By doing so, a plurality of them are installed side by side in the lateral direction with respect to the penetrating portion 4, and the bolts 16 passed through the bolt holes 15 are screwed into the main body 1 side so that they can be detachably fixed individually.

A steam supply connecting pipe 20 is provided outside the through portion 4 at an upper portion thereof, and a steam extracting connecting pipe 21 is provided at a lower portion outside the through portion 4 of the through portion 4. These connecting pipes 20 and 21 have a plurality of connecting pipe portions 20A and 21A, respectively, and the connecting pipe portions 13A and 14A of the superheater unit body 10 are connected to the connecting pipe portions 20A and 21A with bolts and nuts. Connection can be separated via the flange connection structure used.

According to the above-described embodiment, a plurality of superheater unit bodies 10 are set using the penetrating portion 4 and fixed to the main body 1 by the bolts 16, and the connecting pipe portions 13A and 14A are connected to the connecting pipe portion 20A. , It can be operated by connecting to 21A. That is, during operation, steam is supplied from the steam supply communication pipe 20 to the superheat pipe 12 via the first header pipe 13, and the steam gradually flows downward while meandering in the superheat pipe 12. At this time, in the gas path 2, the corrosive gas 3 is flowing from the lower side to the upper side, and the corrosive gas 3 heats the superheated pipe 12, whereby the temperature of the steam is raised. The steam whose temperature has been raised flows through the second header pipe 14 to the steam extraction communication pipe 21.

In the course of use, when the superheated pipe 12 corrodes, it must be replaced. In this replacement, the steam supply connecting pipe 20 and the steam extracting connecting pipe 21 are first separated from the target superheater unit body 10. Then, after the bolt 16 is unscrewed, the superheater unit body 10 is pulled out from the main body 1. Then, after inserting the new superheater unit body 10 into the pulled-out mark, the bolt 16 may be screwed and fixed, and the supply connection pipe 20 and the extraction connection pipe 21 may be connected.

In addition, in one superheater unit body 10, when the lower surface side of the superheater tube 12 has a larger corrosion amount (thinning amount) than the upper surface side, the superheater unit body extracted as described above. Rotate 10 by 180 degrees, then insert the superheater unit body 10 and fix it. At this time, the lower second header pipe 14 is connected to the steam supply connecting pipe 20, and the upper first header pipe 13 is connected to the steam extracting connecting pipe 21. By using them in the reverse direction, the service life of one superheater unit body 10 is extended.

The attachment / detachment of the mounting member 11 to / from the main body 1 and the connection / separation of the header pipes 13 and 14 and the communication pipes 20 and 21 can be easily performed by a one-touch type bolt-nut structure or the like. It is also possible to fabricate an overheater consisting of a plurality of overheater unit bodies 10 with several blocks in reserve.

In the above embodiment, when the mounting member 11 is fixed to the main body 1, the bolt hole 15 facing the through portion 4 is appropriately closed with a blind bolt or the like. A plurality of penetrating portions 4 may be formed in parallel corresponding to each superheater unit body 10. Further, in the above-described embodiment, the steam supply connecting pipe 20 is arranged on the outer side of the penetrating portion 4 and the steam takeout connecting pipe 21 is arranged on the lower part. It is also possible to arrange it in the lower part and the communication pipe 21 for taking out steam in the upper part so that the steam flows along the flow direction of the corrosive gas 3.

[0019]

[Effect of the device]

 According to the present invention having the above-mentioned configuration, it is possible to operate by setting a plurality of superheater unit bodies, fixing them to the main body, and connecting both header pipes to the corresponding connecting pipes. When the superheater pipe is corroded, replace it by separating both header pipes of the target superheater unit body from the connecting pipe and separating it from the main body, and then pulling out this superheater unit body from the main body This can be done by inserting a different superheater unit body and fixing it to the main body, and then connecting both header pipes to the connecting pipe.Therefore, replacement work can be performed with the superheater unit body that is easy to handle as a unit body. It can be done easily and with a significantly reduced construction period. The amount of incineration can be secured by greatly shortening the construction period, that is, the period during which the incinerator is shut down.

Further, since the superheater unit body is vertically and horizontally symmetrical, if the lower side of the superheater pipe has a larger amount of corrosion than the upper side and a difference in the amount of thinning occurs, it is pulled out. It is sufficient to rotate the superheater unit body 180 degrees and then reinsert it and fix it. This makes it possible to extend the service life of one superheater unit body.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of a heat recovery boiler facility according to an embodiment of the present invention.

FIG. 2 is a perspective view of the superheater unit body.

[Explanation of symbols]

 1 Main body 2 Corrosive gas path 3 Corrosive gas 4 Penetration part 10 Superheater unit body 11 Mounting member 12 Superheat pipe 13 First header pipe 14 Second header pipe 20 Supply connection pipe 21 Extraction connection pipe

Front page continued (72) Inventor Kazuhiko Minami 5-3-8 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. No. Hitachi Shipbuilding Co., Ltd. (72) Inventor Masaharu Terashima 3-8, Nishikujo 5-3, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A heat recovery boiler facility in which a superheater is installed in a gas path, wherein a rectangular plate-shaped attachment member is detachably attached to a main body side forming the gas passage, and end portions are upper and lower portions of the attachment member. The upper and lower parts by a superheater pipe group that penetrates through and has a middle portion meandering inside the attachment member, a first header pipe to which one end of the superheater pipe group is connected outside the attachment member, and a second header pipe to which the other end is connected. -A heat recovery boiler facility characterized in that a symmetrical superheater unit body is formed on the left and right sides, and a plurality of superheater unit bodies are detachably attached to the main body.