Flue gas recycling heat-conducting oil furnace

Abstract

The utility model discloses a heat-conducting oil furnace capable of recycling smoke, which relates to the field of heating systems and comprises a heat-conducting oil furnace body, two air inlets are arranged on a burner of the heat-conducting oil furnace body, a smoke exhaust pipe is arranged on the heat-conducting oil furnace body, the smoke exhaust pipe is communicated with one of the two air inlets through a return pipe, and the return pipe is communicated with the other of the two air inlets. And the other air inlet is used for inputting natural air, and an electric control valve is arranged on the return pipe. The heat-conducting oil furnace has the beneficial effects that part of flue gas discharged by the heat-conducting oil furnace body enters the heat-conducting oil furnace body through the return pipe and participates in combustion, the content of nitrogen in the flue gas can be reduced through secondary combustion, so that the equipment cost is reduced, meanwhile, the flue gas flowing back to the heat-conducting oil furnace body can improve heat in the heat-conducting oil furnace body, fuel is saved, and the environment is protected. And energy conservation and emission reduction are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of heating systems, and particularly relates to a heat-conducting oil furnace for recovering and utilizing flue gas. Background Art

[0002] In a three-phase separation workshop, a heat-conducting oil furnace is used to heat heat-conducting oil. The heat-conducting oil cooperates with heat-conducting pipes to heat raw materials. The heat-conducting oil furnace mostly uses gas to heat the heat-conducting oil. The flue gas generated after the gas burns contains nitrogen, and direct emission does not meet the standards.

[0003] The essence of low-nitrogen combustion technology is all technologies for controlling the combustion process. According to the 20-year use experience of low-nitrogen burners in European and American countries, for industrial boilers to achieve truly continuous and reliable low-nitrogen combustion, simply replacing or reforming the burner is not enough, and the existing thick-thin type burners, mixed type burners, and flame separation type burners have high costs. Therefore, it is necessary to propose a heat-conducting oil furnace for reducing nitrogen emissions that does not have special requirements for the type of burner.

[0004] In addition, the existing heat-conducting oil furnaces lack the utilization of flue gas and need to be further optimized in terms of energy conservation and emission reduction. Content of the Utility Model

[0005] The purpose of the utility model is to provide a heat-conducting oil furnace for recovering and utilizing flue gas to solve the above problems, as described in detail below.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A heat-conducting oil furnace for recovering and utilizing flue gas provided by the utility model includes a heat-conducting oil furnace body. There are two air inlets on the burner of the heat-conducting oil furnace body. A smoke exhaust pipe is arranged on the heat-conducting oil furnace body. The smoke exhaust pipe is communicated with one of the two air inlets through a return pipe. The other air inlet is used for inputting natural air. An electric control valve is arranged on the return pipe.

[0008] Adopting the above heat-conducting oil furnace for recovering and utilizing flue gas, part of the flue gas discharged from the heat-conducting oil furnace body enters the heat-conducting oil furnace body through the return pipe and participates in combustion. The secondary combustion can reduce the nitrogen content in the flue gas. At the same time, the flue gas flowing back to the heat-conducting oil furnace body can increase the heat in the heat-conducting oil furnace body, thereby saving fuel.

[0009] Through the cooperation of the preheating pipe and the heating component, the temperature of the smoke exhaust pipe can be used to preheat the heat-conducting oil entering the heat-conducting oil furnace body, thereby improving the efficiency of the heat-conducting oil furnace body for heating the heat-conducting oil.

[0010] Preferably, the heat-conducting oil furnace body has a heat-conducting oil output end and a heat-conducting oil input end, and the heat-conducting oil input end is communicated with a preheating pipe.

[0011] Preferably, a heating component is arranged between the smoke exhaust pipe and the preheating pipe for transferring the heat in the smoke exhaust pipe to the surface of the preheating pipe.

[0012] Preferably, the heating component includes a first spiral pipe and a second spiral pipe. The first spiral pipe is sleeved on the surface of the preheating pipe, and the second spiral pipe is arranged in the smoke exhaust pipe. Both ends of the first spiral pipe are respectively communicated with an upper circulation pipe and a lower circulation pipe. The other end of the lower circulation pipe is communicated with the lower end of the second spiral pipe. The other end of the upper circulation pipe is communicated with an oil tank bottle, and the oil tank bottle is communicated with the upper end of the second spiral pipe.

[0013] Preferably, a heat insulation sleeve is arranged on the surface of the first spiral pipe.

[0014] Preferably, heat-conducting oil flows in the first spiral pipe and the second spiral pipe.

[0015] Preferably, a flue gas filter and a rain shield are arranged at the upper end of the smoke exhaust pipe.

[0016] Preferably, the caliber of the upper end of the smoke exhaust pipe is smaller than that of the reflux pipe.

[0017] The beneficial effects are as follows:

[0018] 1. Part of the flue gas discharged from the heat-conducting oil furnace body enters the heat-conducting oil furnace body through the reflux pipe and participates in combustion. The secondary combustion can reduce the nitrogen content in the flue gas, thereby reducing the equipment cost. At the same time, the flue gas flowing back to the heat-conducting oil furnace body can increase the heat in the heat-conducting oil furnace body, thereby saving fuel and achieving energy conservation and emission reduction.

[0019] 2. Through the cooperation of the preheating pipe and the heating component, the temperature of the smoke exhaust pipe can be used to preheat the heat-conducting oil entering the heat-conducting oil furnace body, thereby improving the efficiency of heating the heat-conducting oil by the heat-conducting oil furnace body and saving the gas consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is the front view structural schematic diagram of the present invention;

[0022] Figure 2 is the three-dimensional structural schematic diagram of the present invention;

[0023] Figure 3 is the three-dimensional structural schematic diagram of the first spiral pipe of the present invention;

[0024] Figure 4 This is a schematic three - dimensional structure diagram of the second spiral tube of the present utility model.

[0025] The description of the reference numerals in the drawings is as follows:

[0026] 1. Heat - conducting oil furnace body; 2. Air inlet; 3. Smoke exhaust pipe; 4. Return pipe; 5. Electric control valve; 6. Heat - conducting oil output end; 7. Heat - conducting oil input end; 8. Pre - heating pipe; 9. Flue gas filter; 10. Rain - proof cover; 11. Heating component; 12. First spiral tube; 13. Upper circulation pipe; 14. Lower circulation pipe; 15. Oil tank bottle; 16. Second spiral tube; 17. Heat - insulating sleeve. Specific embodiments

[0027] To make the objectives, technical solutions, and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0028] See Figures 1 - 4 As shown, the present utility model provides a heat - conducting oil furnace for flue gas recovery and utilization, including a heat - conducting oil furnace body 1. There are two air inlets 2 on the burner of the heat - conducting oil furnace body 1. A smoke exhaust pipe 3 is arranged on the heat - conducting oil furnace body 1. The smoke exhaust pipe 3 is communicated with one of the two air inlets 2 through a return pipe 4, and the other air inlet 2 is used for inputting natural air. An electric control valve 5 is arranged on the return pipe 4.

[0029] As an optional embodiment, the heat - conducting oil furnace body 1 has a heat - conducting oil output end 6 and a heat - conducting oil input end 7, and the heat - conducting oil input end 7 is communicated with a pre - heating pipe 8.

[0030] A heating component 11 is arranged between the smoke exhaust pipe 3 and the pre - heating pipe 8 for transferring the heat in the smoke exhaust pipe 3 to the surface of the pre - heating pipe 8.

[0031] The heating component 11 includes a first spiral tube 12 and a second spiral tube 16. The first spiral tube 12 is sleeved on the surface of the pre - heating pipe 8, and the second spiral tube 16 is arranged in the smoke exhaust pipe 3. Both ends of the first spiral tube 12 are respectively communicated with an upper circulation pipe 13 and a lower circulation pipe 14. The other end of the lower circulation pipe 14 is communicated with the lower end of the second spiral tube 16, and the other end of the upper circulation pipe 13 is communicated with an oil tank bottle 15. The oil tank bottle 15 is communicated with the upper end of the second spiral tube 16;

[0032] The oil tank bottle 15 has an openable bottle cap. Arranging the oil tank bottle 15 facilitates adding heat - conducting oil into the first spiral tube 12 and the second spiral tube 16;

[0033] The flue gas discharged through the exhaust pipe 3 heats the second spiral pipe 16. The second spiral pipe 16 heats the heat-conducting oil flowing inside it. The heat-conducting oil heats the first spiral pipe 12, and then heats the preheating pipe 8.

[0034] A heat-insulating sleeve 17 is arranged on the surface of the first spiral pipe 12.

[0035] Heat-conducting oil flows inside the first spiral pipe 12 and the second spiral pipe 16.

[0036] A flue gas filter 9 and a rain shield 10 are arranged at the upper end of the exhaust pipe 3. The flue gas filter 9 is a prior art, and its principle will not be elaborated here.

[0037] The diameter of the upper end of the exhaust pipe 3 is smaller than that of the return pipe 4. Such a design can allow more flue gas to enter the return pipe 4.

[0038] With the above structure, part of the flue gas discharged from the heat-conducting oil furnace body 1 enters the heat-conducting oil furnace body 1 through the return pipe 4 and participates in combustion. The secondary combustion can reduce the nitrogen content in the flue gas. At the same time, the flue gas flowing back to the heat-conducting oil furnace body 1 can increase the heat inside the heat-conducting oil furnace body 1, thereby saving fuel.

[0039] Through the cooperation of the preheating pipe 8 and the heating component 11, the temperature of the exhaust pipe 3 can be utilized to preheat the heat-conducting oil entering the heat-conducting oil furnace body 1, thereby improving the efficiency of the heat-conducting oil furnace body 1 in heating the heat-conducting oil.

[0040] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claimed rights.

Claims

1. A flue gas recovery and utilization thermal oil furnace, characterized in that: The invention comprises a heat-conducting oil furnace body (1), wherein a burner of the heat-conducting oil furnace body (1) is provided with two air inlets (2), the heat-conducting oil furnace body (1) is provided with a smoke exhaust pipe (3), the smoke exhaust pipe (3) is connected to one of the two air inlets (2) through a return pipe (4), the other air inlet (2) is used to input natural wind, and the return pipe (4) is provided with an electric regulating valve (5).

2. According to claim 1, a flue gas recovery and utilization thermal oil furnace is characterized in that: The heat-conducting oil furnace body (1) comprises a heat-conducting oil output end (6) and a heat-conducting oil input end (7), and the heat-conducting oil input end (7) is connected to a preheating pipe (8).

3. According to claim 2, a flue gas recovery and utilization thermal oil furnace is characterized in that: A heating component (11) is provided between the smoke exhaust pipe (3) and the preheating pipe (8) for transferring heat in the smoke exhaust pipe (3) to the surface of the preheating pipe (8).

4. The heat transfer oil furnace for flue gas recovery and utilization according to claim 3, characterized in that: The heating component (11) comprises a spiral tube 1 (12) and a spiral tube 2 (16); the spiral tube 1 (12) is sleeved on the surface of the preheating tube (8); the spiral tube 2 (16) is arranged in the smoke exhaust pipe (3); the two ends of the spiral tube 1 (12) are respectively connected to an upper circulation tube (13) and a lower circulation tube (14); the other end of the lower circulation tube (14) is connected to the lower end of the spiral tube 2 (16); the other end of the upper circulation tube (13) is connected to an oil tank bottle (15); and the oil tank bottle (15) is connected to the upper end of the spiral tube 2 (16).

5. The fume recovery and utilization thermal oil furnace according to claim 4, characterized in that: The surface of the spiral tube (12) is provided with a heat-insulating sleeve (17).

6. The fume recovery and utilization thermal oil furnace according to claim 4, characterized in that: Heat transfer oil flows in the spiral tube one (12) and the spiral tube two (16).

7. The fume recovery and utilization thermal oil furnace according to claim 1, characterized in that: A smoke filter (9) and a rain cover (10) are provided at the upper end of the smoke exhaust pipe (3).

8. The fume recovery and utilization thermal oil furnace according to claim 1, characterized in that: The diameter of the upper end of the smoke exhaust pipe (3) is smaller than the diameter of the return pipe (4).

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