RTO heat recovery system

Abstract

The utility model relates to the technical field of aluminum coil tape and iron coil tape coating processing, in particular to an RTO heat recovery system which comprises a combustion furnace and a chimney fixed on the combustion furnace, a heat collector is arranged on the chimney and comprises a first shell and a second shell which are detachably connected, the chimney penetrates through the middle position of the first shell and the middle position of the second shell, and the first shell and the second shell are arranged in parallel. A heating cavity is formed between the interiors of the first shell and the second shell and the outer wall of the chimney, air inlets are fixed to the bottoms of the first shell and the second shell, a first connecting pipe is fixed to the side wall of the bottom end of the first shell, the end, away from the first shell, of the first connecting pipe is connected with a receiving chamber, and an induced draft fan is installed on the first connecting pipe; a second connecting pipe is connected between the receiving chamber and the drying oven, and a suction fan is installed on the second connecting pipe. The device has the technical effects that heat generated by combustion of the RTO combustion furnace is supplied to the drying oven, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of coating processing of aluminum and iron coils, and in particular to an RTO heat recovery system. Background Technology

[0002] When coating aluminum and iron coils, they need to be placed in an oven production line for heating and drying. The waste gas generated during the drying process needs to be treated by an RTO (Regenerative Thermal Oxidizer) furnace. Most existing RTO furnaces are unable to heat the oven, resulting in heat waste. Utility Model Content

[0003] This utility model provides an RTO heat recovery system, which has the technical effect of using the heat generated by the combustion of the RTO furnace to heat the oven, thereby reducing production costs.

[0004] An RTO heat recovery system adopts the following technical solution:

[0005] An RTO heat recovery system includes a combustion furnace and a chimney fixed on the combustion furnace. A heat collector is installed on the chimney. The heat collector includes a first shell and a second shell that are detachably connected. The chimney passes through the middle of the first shell and the second shell. A heating chamber is formed between the interior of the first shell and the second shell and the outer wall of the chimney. An air inlet is fixed at the top of both the first shell and the second shell. A first connecting pipe is fixed on the bottom side wall of the first shell. A receiving chamber is connected to the end of the first connecting pipe away from the first shell. An induced draft fan is installed on the first connecting pipe. A second connecting pipe is connected between the receiving chamber and the oven. A suction fan is installed on the second connecting pipe.

[0006] Furthermore, heat-conducting metal strips are installed on the side wall of the chimney to heat the air inside the heating chamber.

[0007] Furthermore, the heat-conducting metal strip includes an inner metal strip and an outer metal strip. One end of the inner metal strip is located inside the chimney, and the other end of the inner metal strip is inserted into the side wall of the chimney. A connection hole is provided at the end of the inner metal strip inserted into the side wall of the chimney, and the outer metal strip is inserted into the connection hole and threadedly connected to the inner metal strip.

[0008] Furthermore, a first support rod and a second support rod are fixed to the top of the combustion furnace. A support plate is fixed to the top of the first support rod. The support plate is fixed to the bottom of the first shell and the bottom of the second shell by bolts. The induced draft fan is fixed to the second support rod.

[0009] Furthermore, both the first and second connecting pipes are wrapped with insulation cotton, and the insulation cotton is wrapped with aluminum insulation skin.

[0010] Furthermore, a first connecting plate is fixed to both sides of the first housing, and a second connecting plate is fixed to both sides of the second housing. One first connecting plate corresponds to one second connecting plate. Multiple connecting bolts are provided on the first connecting plate. The connecting bolts pass through the first connecting plate and the second connecting plate and are threaded with connecting nuts.

[0011] Compared with the prior art, the present invention has the following technical effects:

[0012] Outside air is drawn into the collector, where it is first heated. The heated air is then transported to the receiving chamber by an induced draft fan. The air in the receiving chamber is then transported to the drying oven by a suction fan. The heated air enters the drying oven to heat and dry the products, and finally enters the combustion furnace. This RTO heat recovery system of this invention can heat the drying oven, reducing heat energy waste. Furthermore, the hot air, after passing through the drying oven, enters the combustion furnace to provide oxygen for the combustion of exhaust gases, improving combustion efficiency. The metal heat-conducting strips further accelerate the heating of the cold air. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of it, do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram illustrating the overall structure of the present invention;

[0015] Figure 2 This is a schematic diagram illustrating the metal heat-conducting strip in this utility model;

[0016] Figure 3 The schematic diagram illustrates the first and second housings in this utility model;

[0017] Figure 4 This is a schematic diagram illustrating the first support rod and support plate in this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Combustion furnace; 11. First support rod; 12. Support plate; 2. Chimney; 3. Heat collector; 31. First shell; 311. Air inlet; 312. Valve; 32. Second shell; 33. Mounting groove; 4. First connecting plate; 5. Second connecting plate; 6. Connecting assembly; 61. Connecting bolt; 62. Connecting nut; 7. Receiving chamber; 71. First connecting pipe; 72. Exhaust fan; 73. Second support rod; 8. Second connecting pipe; 81. Suction fan; 9. Heat-conducting metal strip; 91. Internal metal strip; 911. Connecting hole; 92. External metal strip. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this utility model are used to explain the present utility model, but are not intended to limit the present utility model.

[0020] Reference Figures 1-4 An RTO (Regenerative Thermal Oxidizer) heat recovery system includes a combustion furnace 1 and a chimney 2, with the chimney 2 fixed to the top of the combustion furnace 1. A solar collector 3 is detachably mounted on the chimney 2. The solar collector 3 includes a first housing 31 and a second housing 32, which together form a cylindrical shell. Each of the first and second housings has a mounting groove 33 at its center, which together form a mounting hole through which the chimney 2 passes. A heating chamber is formed between the interior of the first and second housings and the outer wall of the chimney 2.

[0021] First connecting plates 4 are fixed to both sides of the first housing 31, and second connecting plates 5 are fixed to both sides of the second housing 32. A connecting assembly 6 is provided between the first connecting plates 4 and the second connecting plates 5, and the first connecting plates 4 and the second connecting plates 5 are fixed by multiple connecting assemblies 6. The connecting assembly 6 includes a connecting bolt 61 and a connecting nut 62. The connecting bolt 61 passes through the first connecting plate 4 and the second connecting plate 5 and is threadedly connected to the connecting nut 62. Two first support rods 11 are fixed to the top of the combustion furnace 1, and the two first support rods 11 are located on both sides of the chimney 2. A support plate 12 is fixed to the top of the first support rod 11, and the support plate 12 is fixed to the bottom of the first housing 31 and the bottom of the second housing 32 by bolts.

[0022] Multiple air inlets 311 are fixed to the top of both the first housing 31 and the second housing 32. Valves 312 are installed on the air inlets 311. A receiving chamber 7 is provided on one side of the combustion furnace 1. A first connecting pipe 71 connects the receiving chamber 7 to the solar collector 3. The first connecting pipe 71 is fixed to the bottom side wall of the first housing 31, and an induced draft fan 72 is installed on the first connecting pipe 71. A second support rod 73 is fixed to the top of the combustion furnace 1, and the induced draft fan 72 is fixed to the top of the second support rod 73. Under the action of the induced draft fan 72, external cold air enters the solar collector 3 through the air inlets 311. The cold air is heated in the heating chamber and then transported to the receiving chamber 7 by the induced draft fan 72. Two second connecting pipes 8 are fixed between the receiving chamber 7 and the oven. A suction fan 81 is installed on each second connecting pipe 8. The suction fan 81 can transport the hot air in the receiving chamber 7 to the oven. After being heated by the heat collector 3, the cold air is finally delivered to the oven to heat the oven, reducing the waste of resources. After entering the oven, the hot air eventually enters the combustion furnace 1 to provide oxygen for the combustion of waste gas.

[0023] A heat-conducting metal strip 9 is provided on the side wall of the chimney 2. The heat-conducting metal strip 9 includes an inner metal strip 91 and an outer metal strip 92. One end of the inner metal strip 91 is located inside the chimney 2, and the other end of the inner metal strip 91 is inserted into the side wall of the chimney 2 and flush with the outer side wall. A connecting hole 911 is opened at one end of the inner metal strip 91, and one end of the outer metal strip 92 is inserted into the connecting hole 911. An external thread is opened on the outer wall of the outer metal strip 92, and an internal thread is opened on the wall of the connecting hole 911. The outer metal strip 92 is threadedly connected to the inner metal strip 91. The heat-conducting metal strip 9 can further heat the air entering from the air inlet 311. The heat-conducting metal strip 9 is set separately, which facilitates the transportation of the chimney.

[0024] The outer walls of the first connecting pipe 71 and the second connecting pipe 8 are wrapped with insulation components, which include insulation cotton and aluminum insulation skin. The insulation cotton is wrapped around the outside of the first connecting pipe 71, and the aluminum insulation skin is wrapped around the outside of the insulation cotton.

[0025] The implementation principle of the RTO heat recovery system of this utility model is as follows: When the combustion furnace 1 is burning, external air needs to be transported into the combustion furnace 1. The external air is drawn into the heat collector 3 by the induced draft fan 72 to heat the external cold air first. The heated air is then transported to the receiving chamber 7 by the induced draft fan 72. The air in the receiving chamber 7 is transported to the drying oven by the suction fan 81. The heated air enters the drying oven to heat and dry the product, and finally enters the combustion furnace 1.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. An RTO heat recovery system, characterized in that, The device includes a combustion furnace (1) and a chimney (2) fixed on the combustion furnace (1). A heat collector (3) is installed on the chimney (2). The heat collector (3) includes a first housing (31) and a second housing (32) that are detachably connected. The chimney (2) passes through the middle of the first housing (31) and the second housing (32). A heating chamber is formed between the interior of the first housing (31) and the second housing (32) and the outer wall of the chimney (2). An air inlet (311) is fixed at the top of both the first housing (31) and the second housing (32). A first connecting pipe (71) is fixed on the bottom side wall of the first housing (31). A receiving chamber (7) is connected to the end of the first connecting pipe (71) away from the first housing (31). An induced draft fan (72) is installed on the first connecting pipe (71). A second connecting pipe (8) is connected between the receiving chamber (7) and the oven. A suction fan (81) is installed on the second connecting pipe (8).

2. The RTO heat recovery system according to claim 1, characterized in that, The side wall of the chimney (2) is provided with heat-conducting metal strips (9) for heating the air in the heating chamber.

3. The RTO heat recovery system according to claim 2, characterized in that, The heat-conducting metal strip (9) includes an inner metal strip (91) and an outer metal strip (92). One end of the inner metal strip (91) is located inside the chimney (2), and the other end of the inner metal strip (91) is inserted into the side wall of the chimney (2). A connection hole (911) is provided at the end of the inner metal strip (91) inserted into the side wall of the chimney (2). The outer metal strip (92) is inserted into the connection hole (911) and threadedly connected to the inner metal strip (91).

4. The RTO heat recovery system according to claim 1, characterized in that, The combustion furnace (1) is fixed with a first support rod (11) and a second support rod (73) at the top. The first support rod (11) is fixed with a support plate (12). The support plate (12) is fixed to the bottom of the first shell (31) and the bottom of the second shell (32) by bolts. The induced draft fan (72) is fixed on the second support rod (73).

5. The RTO heat recovery system according to claim 1, characterized in that, Both the first connecting pipe (71) and the second connecting pipe (8) are wrapped with thermal insulation cotton, and the thermal insulation cotton is wrapped with aluminum thermal insulation skin.

6. The RTO heat recovery system according to claim 1, characterized in that, The first housing (31) is fixed with a first connecting plate (4) on both sides, and the second housing (32) is fixed with a second connecting plate (5) on both sides. One first connecting plate (4) corresponds to one second connecting plate (5). Multiple connecting bolts (61) are provided on the first connecting plate (4). The connecting bolts (61) pass through the first connecting plate (4) and the second connecting plate (5) and are threaded with connecting nuts (62).

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