阅读说明：本技术 用于大型电站机组脱硝斜烟道的支吊装置 (Supporting and lifting device for denitration inclined flue of large power station unit ) 是由 陈瑶 马红娟 侯丙军 于 2021-08-31 设计创作，主要内容包括：本发明公开了用于大型电站机组脱硝斜烟道的支吊装置,包括：反应器出口烟道,其设置在脱硝反应器的出口和锅炉空气预热器的进口之间；刚性吊架,其固定在反应器出口烟道前端的上侧,刚性吊架与反应器出口烟道的接触点为膨胀死点a；固定刚性支腿,其固定在反应器出口烟道前端的下侧,固定刚性支腿与反应器出口烟道的前端下侧的接触点为膨胀死点b,膨胀死点a和膨胀死点b处于同一水平面上。本发明对大跨度的斜烟道设置刚性吊架、固定刚性支腿和滑动刚性支腿,既能避免增加膨胀节或弹簧支吊架等其他设备,又能够满足烟道的荷载以及热位移需要,提高烟道及烟道支座的牢固性和稳定性,延长烟道及烟道支座的使用寿命。(The invention discloses a supporting and hanging device for a denitration inclined flue of a large power station unit, which comprises: the reactor outlet flue is arranged between the outlet of the denitration reactor and the inlet of the boiler air preheater; the rigid hanging bracket is fixed on the upper side of the front end of the outlet flue of the reactor, and the contact point of the rigid hanging bracket and the outlet flue of the reactor is an expansion dead point a; and the fixed rigid supporting leg is fixed on the lower side of the front end of the reactor outlet flue, the contact point of the fixed rigid supporting leg and the lower side of the front end of the reactor outlet flue is an expansion dead point b, and the expansion dead point a and the expansion dead point b are positioned on the same horizontal plane. The invention arranges the rigid hanging bracket, the fixed rigid supporting leg and the sliding rigid supporting leg on the large-span inclined flue, thereby not only avoiding adding other devices such as an expansion joint or a spring supporting and hanging bracket, but also meeting the load and thermal displacement requirements of the flue, improving the firmness and stability of the flue and the flue support and prolonging the service life of the flue and the flue support.)

1. A prop up and hang device that is used for oblique flue of large-scale power station unit denitration, its characterized in that includes:

the reactor outlet flue is arranged between the outlet of the denitration reactor and the inlet of the boiler air preheater;

the rigid hanging bracket is fixed on the upper side of the front end of the reactor outlet flue, and the contact point of the rigid hanging bracket and the reactor outlet flue is an expansion dead point a;

and the fixed rigid support leg is fixed on the lower side of the front end of the reactor outlet flue, the contact point of the fixed rigid support leg and the lower side of the front end of the reactor outlet flue is an expansion dead point b, and the expansion dead point a and the expansion dead point b are positioned on the same horizontal plane.

2. The supporting and hanging device for the denitration inclined flue of the large-scale power station unit as claimed in claim 1, further comprising:

and the sliding rigid support leg is connected to the lower side of the rear end of the reactor outlet flue in a sliding manner, and the contact point of the sliding rigid support leg and the reactor outlet flue is an expansion dead center c.

3. The supporting and hanging device for the denitration inclined flue of the large power station unit as claimed in claim 2, wherein flue reinforcing ribs are arranged in the outlet flue of the reactor along the radial direction;

the denitration reactor is characterized in that a reactor outlet expansion joint is arranged at the outlet communication position of the reactor outlet flue and the denitration reactor, an air preheater inlet expansion joint is arranged at the inlet communication position of the reactor outlet flue and the air preheater, and a closing baffle is arranged at the front end of the reactor outlet flue.

4. The support device for the denitration inclined flue of the large-scale power station unit as claimed in claim 1, wherein the fixed rigid support leg comprises:

the support leg top plate is abutted against the outer wall of the outlet flue of the reactor and is fixedly connected with the flue reinforcing rib;

the landing leg shaped steel, it sets up along vertical direction, the one end rigid coupling of landing leg shaped steel in on the landing leg roof.

5. The support device for the denitration inclined flue of the large-scale power station unit as claimed in claim 2, wherein the sliding rigid support leg comprises:

the upper top plate of the support leg is abutted against the outer wall of the outlet flue of the reactor and is fixedly connected with the flue reinforcing rib;

the lower top plate of the supporting leg is arranged in parallel with the upper top plate of the supporting leg and is connected with the upper top plate of the supporting leg in a sliding way;

the landing leg shaped steel, it sets up along vertical direction, the one end rigid coupling of landing leg shaped steel in on the roof board under the landing leg.

6. The support and hanging device for the denitration oblique flue of the large-scale power station unit as claimed in claim 5, wherein a cushion block is arranged between the upper top plate of the support leg and the lower top plate of the support leg, an oblong mounting hole is arranged on the upper top plate of the support leg, a circular mounting hole is arranged on the lower top plate of the support leg, and the upper top plate of the support leg, the cushion block and the lower top plate of the support leg are slidably connected through a bolt passing through the oblong mounting hole and the circular mounting hole.

7. The supporting and hanging device for the denitration inclined flue of the large-scale power station unit as claimed in any one of claims 4 or 5, wherein a reinforcing rib plate is arranged in the supporting leg section steel.

8. The support and hanging device for the denitration inclined flue of the large power station unit as claimed in claim 2, wherein the rigid support frame, the fixed rigid support leg and the sliding rigid support leg are arranged at equal intervals on the premise of meeting the requirements of a steel frame and a denitration system.

9. The supporting and hanging device for the denitration inclined flue of the large power station unit as claimed in claim 6, wherein the cushion block is a cast aluminum, zinc and copper cushion block.

10. The support device for the denitration oblique flue of the large power station unit as claimed in claim 2, wherein the connection parts of the reactor outlet flue and the rigid support frame, the fixed rigid support leg and the sliding rigid support leg are provided with transverse reinforcing ribs and longitudinal reinforcing ribs, and the inner support rod is arranged at the position where the transverse reinforcing ribs are arranged.

Technical Field

The invention belongs to the technical field of thermal power plants, and relates to a supporting and hanging device for an irregular inclined flue at the tail part of a large thermal power plant boiler due to the limited space after a denitration device is additionally arranged, in particular to a supporting and hanging device for a denitration inclined flue of a large power plant unit.

Background

The denitration system is a standard configuration of a newly-built national thermal power plant, wherein the denitration flue is an important component in a boiler denitration system of the thermal power plant and is used for bearing and transmitting high-dust high-temperature and corrosive flue gas serving as a medium in the denitration system. The arrangement of the reactor outlet flue is limited by the position of the air preheater, and the reactor outlet flue is usually an irregularly-oriented flue with a section of inclination and a long span in consideration of economy when the position of the air preheater is close to the outlet of the economizer. When the flue is long, a plurality of groups of supporting and hanging devices need to be arranged, and when the flue is inclined, expansion displacement difference in the height direction exists among the groups of supporting and hanging devices. The expansion displacement difference problem is solved, one of the conventional schemes is to increase an expansion joint and reduce the span of a flue, so that the expansion problem can be solved, but the number of the whole section of flue supports and hangers is increased after the expansion joint is increased, and the cost is increased; the other scheme is to use a spring support and hanger, and can also solve the expansion problem, but the cost of the spring support and hanger is increased a lot for a rigid support and hanger, and the stability is poor.

Disclosure of Invention

An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.

The invention also aims to provide a supporting and lifting device for the denitration inclined flue of the large-scale power station unit, which can not only meet the requirement of the stress distribution uniformity of the large-scale inclined flue, but also absorb the thermal displacement of the large-scale inclined flue without using a variable spring supporting and lifting frame, thereby meeting the rationality requirement of an expansion system, effectively avoiding the displacement stress of the spring lifting frame to the flue caused by the thermal expansion of the flue, improving the safety and the stability of the flue, and simultaneously being more economic.

Therefore, the technical scheme provided by the invention is as follows:

a prop up and hang device that is used for oblique flue of large-scale power station unit denitration, include:

a reactor outlet flue disposed between an outlet of the denitrification reactor and an inlet of a boiler air preheater, the reactor outlet flue;

the rigid hanging bracket is fixed on the upper side of the front end of the reactor outlet flue, and the contact point of the rigid hanging bracket and the reactor outlet flue is an expansion dead point a;

and the fixed rigid support leg is fixed on the lower side of the front end of the reactor outlet flue, the contact point of the fixed rigid support leg and the lower side of the front end of the reactor outlet flue is an expansion dead point b, and the expansion dead point a and the expansion dead point b are positioned on the same horizontal plane.

Preferably, the supporting and hanging device for the denitration inclined flue of the large power station unit further comprises:

and the sliding rigid support leg is connected to the lower side of the rear end of the reactor outlet flue in a sliding manner, and the contact point of the sliding rigid support leg and the reactor outlet flue is an expansion dead center c.

Preferably, in the supporting and lifting device for the denitration inclined flue of the large power station unit, flue reinforcing ribs are arranged in the outlet flue of the reactor along the radial direction of the outlet flue;

the denitration reactor is characterized in that a reactor outlet expansion joint is arranged at the outlet communication position of the reactor outlet flue and the denitration reactor, an air preheater inlet expansion joint is arranged at the inlet communication position of the reactor outlet flue and the air preheater, and a closing baffle is arranged at the front end of the reactor outlet flue.

Preferably, in the supporting and hanging device for the denitration inclined flue of the large power station unit, the fixed rigid supporting leg includes:

the support leg top plate is abutted against the outer wall of the outlet flue of the reactor and is fixedly connected with the flue reinforcing rib;

the landing leg shaped steel, it sets up along vertical direction, the one end rigid coupling of landing leg shaped steel in on the landing leg roof.

Preferably, in the supporting and hanging device for the denitration inclined flue of the large power station unit, the sliding rigid supporting leg includes:

the upper top plate of the support leg is abutted against the outer wall of the outlet flue of the reactor and is fixedly connected with the flue reinforcing rib;

the lower top plate of the supporting leg is arranged in parallel with the upper top plate of the supporting leg and is connected with the upper top plate of the supporting leg in a sliding way;

the landing leg shaped steel, it sets up along vertical direction, the one end rigid coupling of landing leg shaped steel in on the roof board under the landing leg.

Preferably, in the supporting and hoisting device for the denitration inclined flue of the large power station unit, a cushion block is arranged between the upper supporting leg top plate and the lower supporting leg top plate, an oblong mounting hole is formed in the upper supporting leg top plate, a circular mounting hole is formed in the lower supporting leg top plate, and the upper supporting leg top plate, the cushion block and the lower supporting leg top plate are in sliding connection through bolts penetrating through the oblong mounting hole and the circular mounting hole.

Preferably, in the supporting and hoisting device for the denitration inclined flue of the large power station unit, the reinforced rib plate is arranged in the supporting leg section steel.

Preferably, in the supporting and hoisting device for the denitration inclined flue of the large power station unit, the rigid hoisting frame, the fixed rigid support leg and the sliding rigid support leg are arranged at equal intervals on the premise of meeting the requirements of a steel frame and a denitration system.

Preferably, in the supporting and hoisting device for the denitration inclined flue of the large power station unit, the cushion block is a cast aluminum-zinc-copper cushion block.

Preferably, in the supporting and hoisting device for the denitration inclined flue of the large power station unit, the connecting parts of the reactor outlet flue and the rigid hoisting frame, the fixed rigid supporting leg and the sliding rigid supporting leg are provided with transverse reinforcing ribs and longitudinal reinforcing ribs, and the inner supporting rods are arranged at the positions where the transverse reinforcing ribs are arranged.

The invention at least comprises the following beneficial effects:

1. the flue supporting and hanging device is simple in structure, reasonable in layout, safe, economical and reliable to use and wide in application prospect.

2. The support and hanging device can ensure the vertical displacement of the flue after being heated and can simultaneously meet the horizontal displacement of the flue after being heated, thereby effectively avoiding the thermal displacement stress generated on the flue when the conventional spring hanging bracket is selected.

3. The flue supporting and hanging device provided by the invention realizes the uniformity of load distribution of the large-span inclined flue, simultaneously ensures the rationality of an expansion system of the whole section of flue, and improves the safety and stability of the flue.

The denitration inclined flue supporting and hanging device disclosed by the invention has the advantages that the stress analysis is carried out, the expansion dead point is determined, and the rigid hanging frame, the fixed rigid supporting leg and the sliding rigid supporting leg are arranged on the large-span inclined flue, so that the expansion joint or the spring supporting and hanging frame and other equipment are not increased, the load and the thermal displacement requirements of the flue can be met, the firmness and the stability of the flue and a flue support are improved, and the service life of the flue and the flue support is prolonged.

The invention can not only solve the requirement of the stress distribution uniformity of the large-scale inclined flue, but also absorb the thermal displacement of the large-scale inclined flue without using a variable spring support hanger, thereby meeting the rationality requirement of an expansion system, effectively avoiding the displacement stress of the spring hanger to the flue caused by the thermal expansion of the flue, improving the safety and the stability of the flue, and simultaneously, the proposal of the invention is relatively more economic.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a layout diagram of a supporting and hanging device for a denitration inclined flue of a large power station unit in one embodiment of the invention.

Fig. 2 is a schematic structural diagram of a fixed rigid leg according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a sliding rigid leg according to an embodiment of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

The invention provides a supporting and hanging device for a denitration inclined flue of a large-scale power station unit, which comprises:

and a reactor outlet flue 4 disposed between an outlet of the denitration reactor and an inlet of the air preheater of the boiler, an end of the reactor outlet flue 4 communicating with the air preheater being defined as a front end thereof, and an end communicating with the denitration reactor being defined as a rear end thereof.

And the rigid hanger 1 is fixed on the upper side of the front end of the reactor outlet flue 4, and the contact point of the rigid hanger 1 and the reactor outlet flue 4 is an expansion dead point a.

And the fixed rigid supporting leg 2 is fixed on the lower side of the front end of the reactor outlet flue 4, the contact point of the fixed rigid supporting leg 2 and the lower side of the front end of the reactor outlet flue 4 is an expansion dead point b, and the expansion dead point a and the expansion dead point b are positioned on the same horizontal plane. And (3) determining the positions of the rigid hanging bracket, the fixed rigid supporting leg, the sliding rigid supporting leg, the expansion dead point and the like by carrying out stress analysis on the outlet flue of the reactor.

The denitration inclined flue supporting and hanging device disclosed by the invention is used for performing stress analysis and determining an expansion dead point, the flue is expanded upwards and downwards in the vertical direction by taking the section a-b as an interface, and the rigid hanging frame 1 and the fixed rigid supporting leg 2 are arranged on the large-span inclined flue, so that the expansion joint or spring supporting and hanging frame and other equipment are not increased, the load and thermal displacement requirements of the flue can be met, the firmness and stability of the flue and a flue support are improved, and the service life of the flue and the flue support is prolonged.

In one embodiment of the present invention, it is preferable that:

and the sliding rigid supporting leg 3 is connected to the lower side of the rear end of the reactor outlet flue 4 in a sliding mode, and the contact point of the sliding rigid supporting leg 3 and the reactor outlet flue 4 is an expansion dead center c. And the expansion direction of the b-c section is as shown by the arrow in figure 1, namely the b is taken as a dead point and the expansion direction is respectively towards the two directions which are vertical to the b-c surface and parallel to the b-c surface. Therefore, the supporting legs b are in welded connection, and are fixedly connected according to the structure shown in figure 2 in the design process, namely expansion dead points are formed. And the c supporting leg is in a sliding connection mode, and the structure is designed particularly according to the sliding mode along the inclined plane shown in fig. 3 so as to meet the requirement of heat displacement in two directions of the flue.

The technical core of the invention is to select a reasonable expansion dead point. As shown in fig. 1, the section a-b-c is selected as the expansion dead center in the vertical direction of the flue: the expansion direction of the section b-c is shown by arrows in the figure, namely the expansion direction is respectively towards two directions which are vertical to the plane b-c and parallel to the plane b-c by taking the section b as a dead point. Therefore, the supporting legs b are in welded connection, and are fixedly connected according to the structure shown in figure 2 in the design process, namely expansion dead points are formed. And the c supporting leg is in a sliding connection mode, and the structure is designed particularly according to the sliding mode along the inclined plane shown in fig. 3 so as to meet the requirement of heat displacement in two directions of the flue.

In order to ensure the uniformity of the flue load distribution, preferably, the rigid hanger 1, the fixed rigid support leg 2 and the sliding rigid support leg 3, i.e., the hangers a, b and c shown in fig. 1, are arranged at equal intervals on the premise of meeting the requirements of a steel frame and a denitration system.

In one embodiment of the present invention, it is preferable that a flue reinforcing rib 9 is provided in the reactor outlet flue 4 in a radial direction thereof.

The denitration reactor is characterized in that a reactor outlet expansion joint 5 is arranged at the outlet communication position of the reactor outlet flue 4 and the denitration reactor, an air preheater inlet expansion joint 6 is arranged at the inlet communication position of the reactor outlet flue 4 and the air preheater, and a closing baffle 7 is arranged at the front end of the reactor outlet flue.

In one of the embodiments of the present invention, preferably, as shown in fig. 2, the fixed rigid leg 2 comprises:

and the supporting leg top plate 10 is abutted against the outer wall of the reactor outlet flue 4 and is fixedly connected with the flue reinforcing rib 9. One end of the flue reinforcing rib 9 is fixed on the flue wall plate 8.

And the supporting leg steel 11 is arranged along the vertical direction, and one end of the supporting leg steel 11 is fixedly connected to the supporting leg top plate 10.

In one of the embodiments of the present invention, preferably, as shown in fig. 3, the sliding rigid leg 3 comprises:

and the upper top plate 14 of the support leg is abutted against the outer wall of the outlet flue 4 of the reactor and is fixedly connected with the flue reinforcing rib 9.

And the lower leg top plate 15 is arranged parallel to the upper leg top plate 14 and is connected with the upper leg top plate 14 in a sliding mode.

And the supporting leg steel 11 is arranged along the vertical direction, and one end of the supporting leg steel 11 is fixedly connected to the supporting leg lower top plate 15.

In one embodiment of the present invention, preferably, a pad is disposed between the leg upper top plate 14 and the leg lower top plate 15, an oblong mounting hole is disposed on the leg upper top plate 14, a circular mounting hole is disposed on the leg lower top plate 15, and the leg upper top plate 14, the pad and the leg lower top plate 15 are slidably connected by a bolt 13 passing through the oblong mounting hole and the circular mounting hole. A sliding connection of the sliding rigid leg 3 is achieved.

In one embodiment of the present invention, it is preferable that a reinforcing rib 12 is provided in the leg section steel 11. Further enhancing its robustness.

In one embodiment of the present invention, the spacers are preferably cast aluminum zinc copper spacers 16.

In one embodiment of the present invention, preferably, the connection points of the reactor outlet flue 4 and the rigid hanger 1, the fixed rigid leg 2 and the sliding rigid leg 3 are provided with transverse reinforcing ribs and longitudinal reinforcing ribs, and the inner brace is provided at the position where the transverse reinforcing ribs are provided.

In order to make the technical solution of the present invention better understood by those skilled in the art, the following examples are now provided for illustration:

a prop up and hang device that is used for oblique flue of large-scale power station unit denitration, include:

and a reactor outlet flue 4 disposed between an outlet of the denitration reactor and an inlet of the air preheater of the boiler, an end of the reactor outlet flue 4 communicating with the air preheater being defined as a front end thereof, and an end communicating with the denitration reactor being defined as a rear end thereof.

And the rigid hanger 1 is fixed on the upper side of the front end of the reactor outlet flue 4, and the contact point of the rigid hanger 1 and the reactor outlet flue 4 is an expansion dead point a.

And the fixed rigid supporting leg 2 is fixed on the lower side of the front end of the reactor outlet flue 4, the contact point of the fixed rigid supporting leg 2 and the lower side of the front end of the reactor outlet flue 4 is an expansion dead point b, and the expansion dead point a and the expansion dead point b are positioned on the same horizontal plane. The fixed rigid leg 2 comprises: and the supporting leg top plate 10 is abutted against the outer wall of the reactor outlet flue 4 and is fixedly connected with the flue reinforcing rib. And the supporting leg steel 11 is arranged along the vertical direction, and one end of the supporting leg steel 11 is fixedly connected to the supporting leg top plate 10.

And the sliding rigid supporting leg 3 is connected to the lower side of the rear end of the reactor outlet flue 4 in a sliding mode, and the contact point of the sliding rigid supporting leg 3 and the reactor outlet flue 4 is an expansion dead center c. The sliding rigid leg 3 comprises: and the upper top plate 14 of the support leg is abutted against the outer wall of the outlet flue 4 of the reactor and is fixedly connected with the flue reinforcing rib. And the lower leg top plate 15 is arranged parallel to the upper leg top plate 14 and is connected with the upper leg top plate 14 in a sliding mode. And the supporting leg steel 11 is arranged along the vertical direction, and one end of the supporting leg steel 11 is fixedly connected to the supporting leg lower top plate 15. A cushion block is arranged between the upper top plate 14 of the supporting leg and the lower top plate 15 of the supporting leg, a long circular mounting hole is formed in the upper top plate 14 of the supporting leg, a circular mounting hole is formed in the lower top plate 15 of the supporting leg, and the upper top plate 14 of the supporting leg, the cushion block and the lower top plate 15 of the supporting leg are in sliding connection through a bolt 13 penetrating through the long circular mounting hole and the circular mounting hole. A sliding connection of the sliding rigid leg 3 is achieved.

And flue reinforcing ribs 9 are arranged in the reactor outlet flue 4 along the radial direction of the reactor outlet flue. The denitration reactor is characterized in that a reactor outlet expansion joint 5 is arranged at the outlet communication position of the reactor outlet flue 4 and the denitration reactor, an air preheater inlet expansion joint 6 is arranged at the inlet communication position of the reactor outlet flue 4 and the air preheater, and a closing baffle 7 is arranged at the front end of the reactor outlet flue. And reinforcing rib plates 12 are arranged in the supporting leg section steel 11.

As shown in fig. 1 to 3, the flue support of the present invention is mainly applied to a denitration inclined long flue, and includes a rigid hanger 1 disposed at the front end of a reactor outlet flue 4, a rigid leg 2 and a rigid leg 3 below an inclined section of the reactor outlet flue 4.

When the reactor outlet flue 4 is heated to expand, the reactor outlet flue 4 is divided into two parts by the a-b surface formed between the rigid hanger 1 and the rigid support leg 2, and the upper part and the lower part of the flue respectively expand upwards and downwards by taking the a-b surface as a zero expansion surface in the height direction. The rigid hanging bracket 1 is a universal rigid hanging bracket, can absorb horizontal thermal displacement of the flue and can bear partial vertical load of the denitration flue. Rigidity landing leg 2 and reactor outlet flue 4 welded connection, flue reinforcing rib 9 welds with landing leg roof 10 promptly, landing leg roof 10 again with landing leg shaped steel 11 welding with fixed flue, ensure that the steelframe plays fixed action through rigidity landing leg 2, prevent that the denitration flue from taking place great displacement under horizontal load (wind, earthquake) effect, arouse the denitration flue dislocation, also share the partial load of denitration flue simultaneously.

The plane b-c formed between the rigid leg 2 and the rigid leg 3 is also a zero expansion plane, i.e. the reactor outlet flue 4 above the plane b-c expands in two directions perpendicular to the plane b-c and parallel to the plane b-c, respectively, as indicated by the arrows in fig. 1, with the rigid leg 2 as a dead point. The rigid supporting leg 3 is connected with the outlet flue 4 of the reactor in a sliding way, namely an upper top plate 14 of the supporting leg is welded with the flue reinforcing rib 9, a lower top plate 15 of the supporting leg is welded with the supporting leg section steel 11, and a cast aluminum zinc copper cushion block 16 is arranged on the contact surface of the upper top plate 14 of the supporting leg and the lower top plate 15 of the supporting leg, and the supporting legs 14 and 15 are not welded. Roof 14 and the landing leg are all seted up a mounting hole down on the roof 15 on the landing leg for arrange bolt 13, roof 14 on the landing leg the mounting hole is the long circle (the eccentric length of the mounting hole of long circle is calculated according to the heat displacement of flue and is confirmed), and roof 15 under the landing leg the mounting hole is circular, can insert the back in the mounting hole at bolt 13 like this, can also have certain clearance between bolt 13 and mounting hole, has the clearance all in the left and right sides of bolt, in order to satisfy denitration flue inflation displacement demand. The size of the mounting hole and the length direction of the mounting hole are determined according to the calculation of the thermal displacement of the flue.

The transverse reinforcing ribs and the longitudinal reinforcing ribs are arranged at the positions where the flue supporting and hanging devices are arranged, the inner supporting rods are arranged at the positions where the transverse reinforcing ribs are arranged, and the overall strength of the section of flue can be enhanced. The number of the rigid hanger 1, the rigid support leg 2 and the rigid support leg 3 arranged in the furnace width direction is determined according to the weight of the flue to be carried and the size of the flue in the furnace width direction. The expansion dead point of the reactor outlet flue 4 in the furnace width direction is usually selected at the center of the cross-sectional length dimension of the flue in the furnace width direction.

The technical core of the invention is to select a reasonable expansion dead point. As shown in fig. 1, the section a-b-c is selected as the expansion dead center in the vertical direction of the flue: the expansion direction of the section b-c is shown by arrows in the figure, namely the expansion direction is respectively towards two directions which are vertical to the plane b-c and parallel to the plane b-c by taking the section b as a dead point. Therefore, the supporting legs b are in welded connection, and are fixedly connected according to the structure shown in figure 2 in the design process, namely expansion dead points are formed. And the c supporting leg is in a sliding connection mode, and the structure is designed particularly according to the sliding mode along the inclined plane shown in fig. 3 so as to meet the requirement of heat displacement in two directions of the flue.

Secondly, in order to ensure the uniformity of the flue load distribution, the hangers a, b and c shown in fig. 1 are arranged at equal intervals on the premise of meeting the requirements of a steel frame and a denitration system.

The denitration inclined flue supporting and hanging device disclosed by the invention has the advantages that the stress analysis is carried out, the expansion dead point is determined, and the rigid hanging frame, the fixed rigid supporting leg and the sliding rigid supporting leg are arranged on the large-span inclined flue, so that the expansion joint or the spring supporting and hanging frame and other equipment are not increased, the load and the thermal displacement requirements of the flue can be met, the firmness and the stability of the flue and a flue support are improved, and the service life of the flue and the flue support is prolonged.

The number of modules and the processing scale described herein are intended to simplify the description of the invention. The application, modification and variation of the supporting and hanging device for the denitration inclined flue of the large-scale power station unit are obvious to those skilled in the art.

In conclusion, the flue supporting and hanging device is simple in structure, reasonable in layout, safe, economical and reliable to use, and has wide application prospect. The flue supporting and hanging device disclosed by the invention can ensure the vertical displacement of the flue after being heated and can meet the horizontal displacement of the flue after being heated, so that the thermal displacement stress on the flue when a conventional spring hanging frame is selected can be effectively avoided. The flue supporting and hanging device provided by the invention realizes the uniformity of load distribution of the large-span inclined flue, simultaneously ensures the rationality of an expansion system of the whole section of flue, and improves the safety and stability of the flue.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.