Sealing and supporting structure of organic heat carrier heating furnace

Abstract

The utility model discloses a sealing and supporting structure of an organic heat carrier heating furnace. The sealing and supporting structure comprises a shell, a furnace top cover, a bottom plate, a combustor, an inner-ring furnace tube and an outer-ring furnace tube, the top end of the first steel plate ring is fixedly connected with the bottom face of the furnace top cover in a full-length welding mode, the lower portion of the first steel plate ring wraps the outer side pipe wall of the upper portion of the inner ring furnace pipe, and the lower portion of the first steel plate ring is fixedly connected with the top face of the furnace top cover in a full-length welding mode. The upper portion of the second steel plate ring wraps the inner side pipe wall of the lower portion of the outer ring furnace pipe, the top end of the second steel plate ring is fixedly connected with the inner side pipe wall of the outer ring furnace pipe in a full welding mode, and the bottom end of the second steel plate ring is fixedly connected with the top face of the bottom plate in a full welding mode. And a refractory castable is poured in the inner cavity of the second steel plate ring. According to the utility model, the defect that high-temperature smoke leaks along cracks caused by cracks generated by castable in the prior art is overcome, and the heating furnace is high in safety performance and good in sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to an organic heat carrier heating furnace for industrial heat exchange, in particular to an organic heat carrier heating furnace sealing support structure, belongs to industrial boiler technical field. BACKGROUND

[0002] Due to the improvement of national environmental protection emission requirement, the application of organic heat carrier heating furnace is more and more extensive, since 2010, the demand of organic heat carrier fuel heating furnace is more and more big since the implementation of energy saving and emission reduction.

[0003] The organic heat carrier fuel heating furnace is usually installed on the top of the heating furnace due to the characteristics of fuel, the burner sprays fuel downward for combustion, therefore, the bottom of the furnace body is the part with the highest flue gas temperature, in order to ensure the normal and safe operation of the heating furnace, the existing heating furnace tube support is made of high-temperature stainless steel plate into support leg welded on the bottom of the furnace tube and the bottom plate, the sealing is to insert the heat preservation cotton between the furnace tube and the shell at the lower part of the shell and tighten with stainless steel wire mesh, then weld a circle of stainless steel round steel on the shell to hold, then apply heat preservation and pouring sealing. The existing organic heat carrier heating furnace sealing support structure has the following shortcomings in actual work: on the one hand, there is usually a gap between the round steel and the furnace tube, and even if the gap is tightly plugged with aluminum silicate fiber cotton, it is easy to be blown off by flue gas after a long time, resulting in sealing failure; on the other hand, the pouring material at the contact of the furnace tube is easy to produce crack and loosen due to the thermal expansion of the furnace tube, and the support leg supporting the furnace tube is also easy to expand in the pouring material, causing the pouring material to crack and loosen, so that the high-temperature flue gas leaks along the crack, causing the temperature of the bottom of the heating furnace and the shell to be too high, after a long time of roasting by the leaked high-temperature flue gas, the bottom of the heating furnace and the shell are easy to deform, and even burn through and collapse in serious cases, causing safety accidents. SUMMARY

[0004] The utility model solves the technical problem of overcoming the deficiency of prior art, and provides an organic heat carrier heating furnace sealing support structure which can effectively avoid the crack of pouring material and the leakage of high-temperature flue gas along the crack, has higher safety performance, better sealing performance, and simple structure.

[0005] To solve the above technical problems, the utility model discloses a kind of organic heat carrier heating furnace sealing support structure, including cylindrical shell, furnace top cover being fixedly installed at the top of the shell, bottom plate being fixedly installed at the bottom of the shell, burner and the upright spiral inner ring furnace tube and outer ring furnace tube being installed in the inner cavity of the shell;A through hole is formed in the middle of the furnace top cover, the burner is fixedly installed on the furnace top cover, and the combustion head of the burner passes through the through hole and is placed in the inner cavity of the shell, a flue opening for discharging flue gas is formed on the upper side wall of the shell, further including vertically arranged cylindrical first steel plate ring and second steel plate ring, the first steel plate ring top end is full-welding fixed connection with the bottom surface of the furnace top cover, the first steel plate ring lower part is covered on the upper outer side pipe wall of the inner ring furnace tube, and the first steel plate ring bottom end is full-welding fixed connection with the outer side pipe wall of the inner ring furnace tube, the second steel plate ring upper part is covered on the lower inner side pipe wall of the outer ring furnace tube, and the second steel plate ring top end is full-welding fixed connection with the inner side pipe wall of the outer ring furnace tube, and the second steel plate ring bottom end is full-welding fixed connection with the top surface of the bottom plate, and refractory castable is poured in the inner cavity of the second steel plate ring.

[0006] As a preferred embodiment of the utility model, a plurality of reinforcing rib plates with trapezoidal cross sections are arranged between the second steel plate ring and the shell, the reinforcing rib plates are fixedly connected with the second steel plate ring by welding, and the reinforcing rib plates are uniformly distributed along the circumferential direction of the outer wall of the second steel plate ring.

[0007] As a preferred embodiment of the utility model, the first steel plate ring and the second steel plate ring are made of heat-resistant stainless steel, the reinforcing rib plates are made of ordinary carbon steel, and the refractory castable is made of refractory concrete, mullite or corundum.

[0008] After adopting the above structure, the utility model has the following beneficial effects:

[0009] The utility model discloses a first steel plate ring and second steel plate ring are provided, and the first steel plate ring top is full -solder fixed connection with the furnace top cover bottom surface, and the first steel plate ring lower part is covered on the upper portion outside tube wall of the inner ring furnace pipe, and the first steel plate ring bottom is full -solder fixed connection with the outside tube wall of the inner ring furnace pipe, and the second steel plate ring upper part is covered on the lower portion inside tube wall of the outer ring furnace pipe, and the second steel plate ring top is full -solder fixed connection with the inside tube wall of the outer ring furnace pipe, and the second steel plate ring bottom is full -solder fixed connection with the bottom plate top, and the refractory castable is poured in the second steel plate ring inner chamber, therefore, the first steel plate ring of the utility model and the second steel plate ring not only play the support effect of the inner ring furnace pipe and the outer ring furnace pipe respectively, but also are the sealing plate that high temperature flue gas is sealed in the hearth, when working, the burner sprays fuel downward and burns, and the high temperature flue gas produced by combustion flows from top to bottom in the hearth and then returns to the upper flue outlet between the inner ring furnace pipe and the outer ring furnace pipe and is discharged.

[0010] The utility model discloses simple structure, and the manufacturing cost is low, and the castable is stable and reliable, and the construction is very convenient, and the safety performance of heating furnace is higher, and the sealing performance is better, guarantees the long -term safe use of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0011] The specific implementation of the utility model will be further explained in detail below in combination with the drawings.

[0012] Figure 1 It is a structural schematic diagram of the utility model organic heat carrier heating furnace sealing support structure. SPECIFIC IMPLEMENTATION

[0013] Reference Figure 1The organic heat carrier heating furnace sealing support structure shown in the application comprises a cylindrical shell 1, a furnace top cover 2 fixedly installed on the top of the shell 1, a bottom plate 3 fixedly installed on the bottom of the shell 1, a burner 4, and a vertical spiral inner coil furnace tube 5 and an outer coil furnace tube 6 installed in the inner cavity of the shell 1; the materials of the shell 1 and the bottom plate 3 are generally ordinary carbon steel, a heat preservation material layer 11 is coated on the outer circumferential wall surface of the shell 1, a through hole 2-1 is formed in the middle of the furnace top cover 2, the burner 4 is fixedly installed on the furnace top cover 2 through bolts, the combustion head 4-1 of the burner 4 is arranged in the inner cavity of the shell 1 through the through hole 2-1, a flue port 1-1 for discharging flue gas is formed in the upper side wall of the shell 1, and a vertical cylindrical first steel plate ring 7 and a second steel plate ring 8 are arranged; the top end of the first steel plate ring 7 is fixedly connected with the bottom surface 2-2 of the furnace top cover 2 through full welding, the lower part of the first steel plate ring 7 is coated on the outer side tube wall of the upper part of the inner coil furnace tube 5, and the bottom end 7-1 of the first steel plate ring 7 is fixedly connected with the outer side tube wall of the inner coil furnace tube 5 through full welding, so that the inner coil furnace tube 5 is hung on the furnace top cover 2 through the first steel plate ring 7; the upper part of the second steel plate ring 8 is coated on the inner side tube wall of the lower part of the outer coil furnace tube 6, and the top end 8-1 of the second steel plate ring 8 is fixedly connected with the inner side tube wall of the outer coil furnace tube 6 through full welding; the bottom end of the second steel plate ring 8 is fixedly connected with the top surface 3-1 of the bottom plate 3 through full welding; the refractory castable 9 is poured in the inner cavity of the second steel plate ring 8, and the thickness of the refractory castable 9 can be determined according to actual temperature requirements; the bottom end of the inner coil furnace tube 5 is spaced apart from the refractory castable 9; during work, high-temperature flue gas 12 flows from top to bottom in the hearth and then flows back between the inner coil furnace tube 5 and the outer coil furnace tube 6 to the upper flue port 1-1 for discharge.

[0014] As a preferred embodiment of the application, as shown in the drawings, Figure 1 As shown in the drawings, a plurality of reinforcing rib plates 10 with trapezoidal cross sections are arranged between the second steel plate ring 8 and the shell 1, preferably 4-8 reinforcing rib plates 10, the reinforcing rib plates 10 are fixedly connected with the second steel plate ring 8 through welding, and the reinforcing rib plates 10 are uniformly distributed along the circumferential direction of the outer wall surface of the second steel plate ring 8.

[0015] As a preferred embodiment of the application, the materials of the first steel plate ring 7 and the second steel plate ring 8 are heat-resistant stainless steel, the material of the reinforcing rib plate 10 is ordinary carbon steel, and the material of the refractory castable 9 is refractory concrete or mullite or corundum.

[0016] During work, the burner 4 sprays fuel downward for combustion through the combustion head 4-1, high-temperature flue gas 12 generated by combustion flows from top to bottom in the hearth and then flows back between the inner coil furnace tube 5 and the outer coil furnace tube 6 to the upper flue port 1-1 for discharge.

[0017] Through trial, the present utility model avoids the defects that the cracks of the castable of the prior art lead to the leakage of high-temperature flue gas along the cracks, the heating furnace has high safety performance, good sealing performance, and simple structure, and good practical effects are achieved.

Claims

1. An organic heat carrier heating furnace sealing and supporting structure, comprising a cylindrical shell (1), a furnace top cover (2) fixedly installed at the top of the shell (1), a bottom plate (3) fixedly installed at the bottom of the shell (1), a burner (4), and an upright spiral inner ring furnace tube (5) and an outer ring furnace tube (6) spacedly installed in the inner cavity of the shell (1); a through hole (2-1) is provided in the middle of the furnace top cover (2), the burner (4) is fixedly installed on the furnace top cover (2), and the burner head (4-1) of the burner (4) passes through the through hole (2-1) and is placed in the inner cavity of the shell (1), and a flue gas outlet (1-1) for discharging flue gas is provided on the upper side wall of the shell (1), and it is characterized in that: It also includes a vertically arranged cylindrical first steel plate ring (7) and a second steel plate ring (8). The top of the first steel plate ring (7) is fully welded to the bottom surface (2-2) of the furnace top cover (2). The lower part of the first steel plate ring (7) covers the upper outer wall of the inner ring furnace tube (5), and the bottom end (7-1) of the first steel plate ring (7) is fully welded to the outer wall of the inner ring furnace tube (5). The upper part of the second steel plate ring (8) covers the lower inner wall of the outer ring furnace tube (6), and the top end (8-1) of the second steel plate ring (8) is fully welded to the inner wall of the outer ring furnace tube (6). The bottom end of the second steel plate ring (8) is fully welded to the top surface (3-1) of the bottom plate (3). Refractory castable (9) is poured into the inner cavity of the second steel plate ring (8).

2. The sealed support structure for the organic heat carrier heating furnace according to claim 1, characterized in that: A number of trapezoidal reinforcing ribs (10) are provided between the second steel plate ring (8) and the shell (1). The reinforcing ribs (10) are fixedly connected to the second steel plate ring (8) by welding, and the reinforcing ribs (10) are evenly distributed along the circumferential direction of the outer wall surface of the second steel plate ring (8).

3. The sealed support structure for the organic heat carrier heating furnace according to claim 2, characterized in that: The first steel plate ring (7) and the second steel plate ring (8) are made of heat-resistant stainless steel, the reinforcing rib plate (10) is made of ordinary carbon steel, and the refractory castable (9) is made of refractory concrete, mullite, or corundum.

Images