Large-scale fuel gas heat-conducting oil organic heat transfer material furnace

Abstract

The utility model discloses a large fuel gas heat-conducting oil organic heat carrier furnace which comprises a burner, a furnace body, a high-temperature flue, a radiation heat exchange area, a convection heat exchange area and a smoke outlet. The radiation heat exchange area comprises a spiral vertical coil pipe, the convection heat exchange area comprises a snake-shaped pipe bundle, the radiation heat exchange area and the convection heat exchange area are arranged in a spaced mode, the smoke outlet is formed in the bottom of the convection heat exchange area, and the high-temperature flue is detachably installed above the radiation heat exchange area and the convection heat exchange area and located between the radiation heat exchange area and the convection heat exchange area. The radiation heat exchange area, the high-temperature flue and the convection heat exchange area are sequentially communicated in a fluid mode. An oil inlet of the spiral vertical coil pipe is communicated with the radiation area oil inlet collecting pipe, an oil outlet of the spiral vertical coil pipe is communicated with the radiation area oil outlet collecting pipe, an oil inlet of the S-shaped pipe bundle is communicated with the convection area oil inlet collecting pipe, an oil outlet of the S-shaped pipe bundle is communicated with the convection area oil outlet collecting pipe, and the convection area oil outlet collecting pipe is communicated with the radiation area oil inlet collecting pipe. The heat dissipation loss is small, and the rated thermal power design is not limited.

Description

Technical Field

[0001] The utility model relates to a heat-conducting oil organic heat carrier furnace, in particular to a gas-fired heat-conducting oil organic heat carrier furnace which burns with clean gas as fuel. Background Technique

[0002] China is a developing country with a large population. The Chinese economy is developing strongly, and the environmental protection awareness of the people is gradually increasing. During the critical period of the current energy structure adjustment, many places use clean combustible gases such as natural gas and coke oven gas as fuel to replace coal burning. With the transformation and upgrading of gas-fired heat-conducting oil organic heat carrier furnaces, the rated thermal power of a single gas-fired heat-conducting oil organic heat carrier furnace is getting larger and larger. Traditional large gas-fired heat-conducting oil organic heat carrier furnaces have the following disadvantages: (1) Due to the limitation of transportation size, the design of the rated thermal power of large gas-fired heat-conducting oil organic heat carrier furnaces is restricted; (2) The flue size is too long, and the heat dissipation loss is large; (3) Due to structural limitations, the air preheater cannot be reasonably configured. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a large gas-fired heat-conducting oil organic heat carrier furnace with an unrestricted rated thermal power design and small heat dissipation loss.

[0004] To solve the above technical problem, the utility model adopts such a large gas-fired heat-conducting oil organic heat carrier furnace, which includes a burner, a furnace body, a high-temperature flue, a radiation heat exchange area, a convection heat exchange area and a flue gas outlet; the burner is installed at the bottom of the furnace body, the radiation heat exchange area includes spiral vertical coils, the spiral vertical coils are installed in the furnace body, the convection heat exchange area includes serpentine tube bundles, the radiation heat exchange area and the convection heat exchange area are arranged at intervals, the flue gas outlet is arranged at the bottom of the convection heat exchange area, the high-temperature flue is detachably installed above the radiation heat exchange area and the convection heat exchange area and is located between the radiation heat exchange area and the convection heat exchange area, and the radiation heat exchange area, the high-temperature flue and the convection heat exchange area are sequentially fluidly connected; the oil inlet of the spiral vertical coil is communicated with the radiation area oil inlet header, the oil outlet of the spiral vertical coil is communicated with the radiation area oil outlet header, the oil inlet of the serpentine tube bundle is communicated with the convection area oil inlet header, the oil outlet of the serpentine tube bundle is communicated with the convection area oil outlet header, and the convection area oil outlet header is communicated with the radiation area oil inlet header through a pipeline.

[0005] As a preferred embodiment of the utility model, the high-temperature flue is composed of a left high-temperature flue and a right high-temperature flue combined through an intermediate connecting flue, the left high-temperature flue is detachably installed above the radiation heat exchange area, and the right high-temperature flue is detachably installed above the convection heat exchange area.

[0006] As a preferred embodiment of the present utility model, it further includes an air preheater, the air preheater is installed below the flue gas outlet, and the radiation heat exchange area, the high-temperature flue, the convection heat exchange area, and the air preheater are fluidly connected in sequence.

[0007] As a preferred embodiment of the present utility model, the convection heat exchange area is further provided with a maintenance door.

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

[0009] The radiation heat exchange area and the convection heat exchange area of the present utility model are arranged at intervals, the high-temperature flue is detachably installed above the radiation heat exchange area and the convection heat exchange area and is located between the radiation heat exchange area and the convection heat exchange area, and the radiation heat exchange area, the high-temperature flue, and the convection heat exchange area are fluidly connected in sequence; such a structure enables the components such as the furnace body and the flue to be arranged most compactly, reduces the heat dissipation surface area, results in small heat dissipation loss, and improves the thermal efficiency of the organic heat carrier furnace.

[0010] The size of the furnace body of the present utility model is not restricted by the structure, and the components such as the furnace body and the flue can be freely combined. On the one hand, the rated heat load of a single organic heat carrier furnace is greatly improved, and on the other hand, the design of the rated thermal power of the organic heat carrier furnace is not restricted.

[0011] The present utility model installs an air preheater below the flue gas outlet, and the radiation heat exchange area, the high-temperature flue, the convection heat exchange area, and the air preheater are fluidly connected in sequence. On the one hand, the present utility model reasonably configures the air preheater in the organic heat carrier furnace, and on the other hand, further improves the thermal energy utilization rate.

[0012] The present utility model adopts a modular design, reduces the installation and construction cost, maximizes and integrates the layout, saves the floor area, and is more energy-saving and consumption-reducing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following further describes in detail the specific embodiments of the present utility model with reference to the drawings.

[0014] Figure 1 It is a schematic structural view of a large-scale gas-fired heat-conducting oil organic heat carrier furnace of the present utility model.

[0015] Figure 2 It is a schematic structural view of the radiation heat exchange area of the present utility model.

[0016] Figure 3 It is a schematic structural view of the convection heat exchange area of the present utility model.

[0017] Figure 4 For Figure 3 the side view schematic diagram. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] See Figures 1 to 4 A large gas-fired heat-conducting oil organic heat carrier furnace shown in the figure, including a burner 1, a furnace body 2, a high-temperature flue 3, a radiation heat exchange area 4, a convection heat exchange area 5 and a flue gas outlet 6. The burner 1 is preferably a low-nitrogen burner; the burner 1 is installed at the bottom of the furnace body 2. In the present utility model, a plurality of support legs 2-1 are detachably installed at the bottom of the furnace body 2 through bolts. The radiation heat exchange area 4 includes a spiral vertical coil 7, and the spiral vertical coil 7 is installed in the furnace body 2. The convection heat exchange area 5 includes a serpentine tube bundle 8 and a box-type furnace wall 5-1. The serpentine tube bundle 8 is usually formed by welding a plurality of straight pipes with elbows to each other. The radiation heat exchange area 4 and the convection heat exchange area 5 are arranged at intervals. The flue gas outlet 6 is arranged at the bottom of the convection heat exchange area 5. The high-temperature flue 3 is detachably installed above the radiation heat exchange area 4 and the convection heat exchange area 5 and is located between the radiation heat exchange area 4 and the convection heat exchange area 5 through bolts. The radiation heat exchange area 4, the high-temperature flue 3, and the convection heat exchange area 5 are fluidly connected in sequence; the oil inlet 7-1 of the spiral vertical coil 7 is communicated with the radiation area oil inlet header 9, the oil outlet 7-2 of the spiral vertical coil 7 is communicated with the radiation area oil outlet header 10, the oil inlet 8-1 of the serpentine tube bundle 8 is communicated with the convection area oil inlet header 11, the oil outlet 8-2 of the serpentine tube bundle 8 is communicated with the convection area oil outlet header 12, and the convection area oil outlet header 12 is communicated with the radiation area oil inlet header 9 through a pipeline 13. During operation, the heat-conducting oil flows through the serpentine tube bundle 8 and the spiral vertical coil 7 in sequence through the oil inlet pipeline 16 and the pipeline 13, and then flows out of the furnace body 2 after being heated.

[0019] As a preferred embodiment of the present utility model, as shown in Figure 1 the figure, the high-temperature flue 3 is composed of a left high-temperature flue 3-1, a right high-temperature flue 3-2 and an intermediate connecting flue 3-3. The left high-temperature flue 3-1 is detachably installed above the radiation heat exchange area 4 through bolts, and the right high-temperature flue 3-2 is detachably installed above the convection heat exchange area 5 through bolts.

[0020] As a preferred embodiment of the present utility model, as shown in Figure 1 the figure, it further includes an air preheater 14. The air preheater 14 is fixedly installed below the flue gas outlet 6. The radiation heat exchange area 4, the high-temperature flue 3, the convection heat exchange area 5, and the air preheater 14 are fluidly connected in sequence. In the present utility model, a plurality of support legs 17 are installed at the bottom of the flue gas outlet 6.

[0021] As a preferred embodiment of the present utility model, as shown in Figure 1 and 4 the figure, the convection heat exchange area 5 is further provided with a maintenance door 15. The maintenance door 15 is arranged on the furnace wall 5-1, making it very convenient for ash cleaning and maintenance.

[0022] See Figure 1 , when the utility model is working, the high-temperature flue gas generated by burning with clean combustible gas as fuel sequentially passes through the spiral vertical coil 7 in the radiation heat exchange area 4, the high-temperature flue 3, and exchanges heat with the serpentine tube bundle 8 in the convection heat exchange area 5, and finally is discharged by the air preheater 14.

Claims

1. A large-scale gas-fired heat-conducting oil organic heat carrier furnace, comprising a burner (1), a furnace body (2), a high-temperature flue (3), a radiation heat exchange area (4), a convection heat exchange area (5) and a flue gas outlet (6); the burner (1) is installed at the bottom of the furnace body (2), the radiation heat exchange area (4) includes a spiral vertical coil (7), the spiral vertical coil (7) is installed in the furnace body (2), the convection heat exchange area (5) includes a serpentine tube bundle (8), characterized in that: The radiation heat exchange area (4) and the convective heat exchange area (5) are arranged at intervals. The flue gas outlet (6) is arranged at the bottom of the convective heat exchange area (5). The high-temperature flue (3) is detachably installed above the radiation heat exchange area (4) and the convective heat exchange area (5) and is located between the radiation heat exchange area (4) and the convective heat exchange area (5). The radiation heat exchange area (4), the high-temperature flue (3), and the convective heat exchange area (5) are fluidly connected in sequence. The oil inlet (7-1) of the spiral vertical coil (7) is connected to the radiation area oil inlet header (9), and the oil outlet (7-2) of the spiral vertical coil (7) is connected to the radiation area oil outlet header (10). The oil inlet (8-1) of the serpentine tube bundle (8) is connected to the convective area oil inlet header (11), and the oil outlet (8-2) of the serpentine tube bundle (8) is connected to the convective area oil outlet header (12). The convective area oil outlet header (12) is connected to the radiation area oil inlet header (9) through a pipeline (13).

2. The large gas-fired heat-conducting oil organic heat carrier furnace according to claim 1, wherein: The high-temperature flue (3) is composed of a left high-temperature flue (3-1) and a right high-temperature flue (3-2) combined through an intermediate connecting flue (3-3). The left high-temperature flue (3-1) is detachably installed above the radiation heat exchange area (4), and the right high-temperature flue (3-2) is detachably installed above the convective heat exchange area (5).

3. The large gas-fired heat-conducting oil organic heat carrier furnace according to claim 1, wherein: It further includes an air preheater (14). The air preheater (14) is installed below the flue gas outlet (6). The radiation heat exchange area (4), the high-temperature flue (3), the convective heat exchange area (5), and the air preheater (14) are fluidly connected in sequence.

4. The large gas-fired heat-conducting oil organic heat carrier furnace according to any one of claims 1 to 3, characterized in that: The convective heat exchange area (5) is further provided with a maintenance door (15).

Images