CN1573208A

CN1573208A - Reinforcement of combustion equipment assembly being a heat exchanger

Info

Publication number: CN1573208A
Application number: CN 200410059578
Authority: CN
Inventors: P·戈维尔; J-C·塞梅达; F·马南特; P·克鲁打
Original assignee: Alstom Schweiz AG
Current assignee: General Electric Technology GmbH
Priority date: 2003-05-28
Filing date: 2004-05-28
Publication date: 2005-02-02
Anticipated expiration: 2024-05-28
Also published as: CN100480580C; FR2855593A1; FR2855593B1

Abstract

The invention relates to a component of the combustion equipment using a heat exchanger as a reinforcing member, comprising a plurality of lateral faces (2c, 2d, 2e, 2f), a top surface (2a), a bottom surface (2b) and an outer reinforcing member (3) on the surfaces. The invention is characterized in that the reinforcing member (3) is made of a plurality of tubes of the heat exchanger. The combustion equipment component has the advantages of reducing the heat-resistant material thickness because the reinforcing member (3) is able to lower the corresponding wall temperature, and decreasing the equipment weight and price.

Description

Its girth member is the member of the combustion apparatus of heat exchanger

Technical field

The present invention relates to combustion apparatus, and relate in particular to some member that constitutes described equipment, the cooler of the bottom ash material of the siege of for example outer bed or recirculating fluidized bed.These equipment need be by the cooling system that is used for fluidized solid that is immersed in the interchanger in the fluidized solid layer.

Background technology

Combustion apparatus is emitted a large amount of heat, thereby needs protection that it constitutes the wall of part, and to avoid the excessive temperature of described wall, this temperature can cause the damage lentamente of wall, and must accord with and can allow the safety standard of personnel near these equipment.

The member of these equipment is made by steel plate, and it can guarantee that these enclose the chamber and for example are being generally 600 millibars of wiper seals under the pressure.We for example use inside and the protection fluidisation wherein that covers these members as the multilayer exotic material of high temperature resistant cement (concrete) etc.; because temperature often can reach 850 degrees centigrade in fluidisation; and for the temperature that makes this steel plate is no more than 60 to 80 degrees centigrade, the thickness that this protective layer should have is 300 to 400 millimeters.But this solution is expensive and makes these members become very heavy.This has also increased the thermal inertia of described member.These coctostable substances also need a lot of maintenance works.

It also can make tubular wall, and tubular wall links to each other by the fin of welding each other, and a kind of heat transport fluid that flowing in the pipe, thereby the thickness of refractory layer can be defined as 50 to 100 millimeters.Usually, this fluid is a kind of water/vapour mixture, and this shape of enclosing the parallelepiped in chamber forces this mixture in some part bottom horizontal flow sheet almost.Thereby need to install the high pumping system of price unfortunately.

In addition, the size of these members forces uses outside or inner distortion and the vertically press-bending of girth member to avoid wall, and this distortion of wall and vertical press-bending may aggravate because of the weight of used heat proof material.

Summary of the invention

The object of the present invention is to provide a kind of more economical and lighter solution in this case.

Member according to combustion apparatus of the present invention comprises: the side, end face and bottom surface, and described add firmware, it is characterized in that girth member is made of heat-exchange tube.These girth members are around this member, so that heat transport fluid can be cooled off whole walls of this member equably and resist the pressure of described component inside.These girth members can reduce the temperature of respective wall, and this can reduce the thickness of used heat proof material, thereby reduce the weight and the cost of this equipment.Quick variation that can bearing temperature than the refractory layer of minimal thickness reduces maintenance, and this equipment of giving is with the bigger free degree, and this equipment is no longer necessary for maintenance and frequent shutdown.The weight of this equipment is littler, can reduce the size of girth member and this assembly and corresponding building supporting frame.

According to another feature of the present invention, girth member has polygonal hollow section and is preferably rectangle.Compare with circular cross-section, the profile of this rectangle and the wall of its supporting have bigger heat-exchange surface, and than a square profile better stiffness are arranged.The long limit of rectangle keeps performance perpendicular to this wall to guarantee a good machinery.The temperature of the profile of girth member and the thickness of used heat proof material, the ash material that circulates in this member and the selected material that is used for this wall and this girth member are relevant; It also depends on the mechanical stress under the pressure and the approrpiate wts of this member.The thickness of this girth member must adapt with the crooking ability of this steel plate.

According to a special feature, this member is an outer fluid bed.The given shape of the complexity of this wall is particularly suitable for this technical scheme, because the rectangular profile of girth member makes its easier connection between the two, and thereby fluid is circulated better along cooling wall.

According to another feature, the fluidization air of this fluid bed is used as heat transport fluid in this girth member.This fluidization air as the use of fluid, can help fluidizing air blower and be used for making air to flow at described pipe in the heat exchange girth member.

According to another feature, the distance that girth member separates is greater than the diameter that advances-go out pipe of the cooling water/vapor recycle of this heat exchange.Thereby the spacing of (embedding) interchanger of the spacing of the heat-exchange tube of this bed and institute's submergence is complementary, and interchanger is taken out for it so that maintenance and change described heat-exchange tube.

According to a special feature, the spacing of girth member at 150mm between the 300mm.This spacing selected considered relevant the entering of interchanger-the leave stress of arm when passing and weld.

According to a special feature, the material therefor of this girth member is a carbon steel.This material is not too expensive, and it also can be used for the wall of combustion apparatus member.

Description of drawings

By to following in conjunction with the accompanying drawings, to provide as just embodiment single box outside the description of bed, just the present invention may be better understood, accompanying drawing is as follows:

Fig. 1 is the perspective view according to an outer bed of the present invention;

Fig. 2 is the detailed view of a wall;

Fig. 3 is the perspective schematic view that a heat transport fluid flows in wall;

Fig. 4 is the part perspective view of the heat-exchange tube assembly of a tape entry;

Fig. 5 is the schematic cross sectional views that the fluid of the outlet side of this bed flows.

The specific embodiment

Outer fluid bed 1 comprise four sidewalls 2 (2c, 2d, 2e, 2f), a upper wall 2a and a lower wall 2b (referring to Fig. 1).This bottom of 1 comprises

pipe

4,50 and 9, and these pipes constitute the beam of supporting this, thereby it is a bearing-type.The assembly of this beam is by 40 supportings of four corner posts.

Each wall comprises 3, one following

pipes

4 or 50 of some girth members; And each wall that has ash material inlet or an outlet comprises that some girth members 3 and one go up pipe 5.Two 4 and two of following pipes are gone up pipe 5 and are arranged on two walls that are perpendicular to one another.Each

pipe

4 or 5 or 50 is connected in a plurality of girth members 3.

Each wall 2c, the girth member 3c of 2a and 2e, 3a and 3e are provided with continuously each other, and pipe and they are connected in the pipe 4 of a side, and the extension under this bed by pipe 3b continuously so that constitute one.These pipes 3b constitutes triangle basically to constitute a hopper, expects so that can discharge the sand and the ash that may fall in blocking (stop) loop.

The girth member 3d of each

wall

2d and 2f and 3f (Fig. 2) are connected in the pipe 5 of a side and the pipe 50 of opposite side, so that constitute the part of a closed circuit.

As shown in Figure 1, this 1 outlet 7 that has at an inlet 6 and the ash material on wall 2d of the ash material on the wall 2f.Inlet 6 and outlet 7 also are through strengthening.

Inside has covered heat proof material 8 (referring to Fig. 2), for example isolated cement 8a and one deck thermal cement 8b, and gross thickness is approximately 120mm.Cement is fixed on the wall by anchor 8c.

Between each girth member 3, as shown in Figure 4, heat-exchange tube 10 enters and leaves this bed 1 (Fig. 1).Pipe 10a is formed in the inlet of the cooling water/vapor recycle of this ash material in 1, and pipe 10b constitutes its outlet.

The spacing of girth member 3 can enter this bed according to the spacing of determining for pipe 10.

Below we will be described in air circulation in this girth member 3.

Air is entered by

pipe

4 and 5, and as Fig. 1,1/4th in pipe 4a, and 1/4th in pipe 4b, and 1/4th in pipe 5a, and 1/4th in pipe 5b.

Supply with girth member 3c by pipe 4 leaked-in airs in staggered mode, 3a and 3e that is to say that each pipe 4 is every the girth member 3 of once supplying with related wall 2.Therefore, pipe 4a supplies with

girth member

3c, 3a and 3e, and the latter is connected with the appropriate section of pipe 3b, thereby air sent back to this inside of 1 again from that side of described part, so that in common mode the particle that circulates is therein carried out fluidisation.Pipe 4b supplies with

girth member

3e, 3a and 3c, and the latter is connected with corresponding another part of pipe 3b, thereby air is sent back to this inside of 1 again from that side of described part.

By the girth member 3d and the 3f (referring to Fig. 1) of pipe 5 leaked-in airs supply side, air is directed to pipe 50, and this pipe is connected in the pipe 9 that is positioned at the center under this base plate of 1.This pipe 9 is right side part or the left part of tube connector 3b alternately.According to mode same as described above, air is admitted to this inside of 1 from the respective side of pipe 3b then.

This recirculation assembly schematically shows in Fig. 3.

Circulation in girth member 3 is arranged all surfaces of making every effort to cover steel plate on different surfaces.Thereby, cyclic representation shown in Figure 5 air the outlet 7 surfaces stroke.The trip obtains by using girth member 3 and some rib such as passage.In the same way, the flow air circulation has covered inlet 6 in girth member 3.

Claims

1. the member of a combustion apparatus comprises: the side (2c, 2d, 2e, 2f), end face (2a) and bottom surface (2b), and described add firmware (3), it is characterized in that: girth member (3) is made of heat-exchange tube.

2. the member of combustion apparatus as claimed in claim 1, it is characterized in that: girth member (3) has the polygonal hollow section that is preferably rectangle.

3. the member of combustion apparatus as claimed in claim 1, it is characterized in that: this member is an outer fluid bed (1).

4. the member of combustion apparatus as claimed in claim 3, it is characterized in that: fluidization air is used as the heat transport fluid in this girth member.

5. as the member of claim 3 or 4 described combustion apparatus, it is characterized in that: the distance that girth member (3) separates is greater than the diameter of the heat-exchange tube (10) of this bed (1).

6. the member of combustion apparatus as claimed in claim 5 is characterized in that: the spacing of girth member (3) at 150mm between the 300mm.

7. the member of combustion apparatus as claimed in claim 1 is characterized in that: this member is the cooler of the siege bottom ash material of a recirculating fluidized bed.

8. the member of combustion apparatus as claimed in claim 1, it is characterized in that: the used material of this girth member is a carbon steel.