Combustion furnace

Abstract

The utility model relates to the field of environmental protection equipment, in particular to a combustion furnace which comprises a combustion chamber, a combustor is arranged in the rear portion of the combustion chamber, and an oil-water atomizing nozzle is arranged below the combustor and connected with an oil-water storage tank through a pipeline. The combustion furnace adopting the structure can be used as a heat source for waste cracking, an oil-water mixture generated by waste cracking can be directly combusted in the combustion furnace, and a stable high-temperature environment in the combustion furnace can ensure complete combustion of the oil-water mixture, so that the problem that the oil-water mixture generated by cracking is difficult to treat is solved; and the processing cost and difficulty are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of environmental protection equipment, and specifically provides a combustion furnace. BACKGROUND

[0002] At present, waste rubber, waste plastics can be treated by high temperature cracking, and a large amount of recyclable oil gas can be produced after cracking. The oil gas needs to be condensed and operated in the recycling process to be converted into processable oil and non-condensable gas. However, due to different sources of cracking materials, the composition of cracking products is also quite different, so the composition of cracking oil gas obtained finally fluctuates greatly, and the products produced in the condensation process are also relatively complex. The inventor of the present application has previously submitted a prior application CN201821301314.5, which discloses a cracking oil product oil separation cooling device. The device directly sends cracking oil gas into the middle part of the oil gas condensation tower A for gas inlet condensation. The oil obtained by condensation is mixed with the oil in the oil tank to better separate the non-condensable gas. However, it is found in actual application that the preloaded oil contains part of the water, and the oil gas also contains a certain amount of water during the cracking process. This part of water needs to be separated from the oil in the subsequent treatment after mixing with the oil. However, due to the complex composition of the oil, the water separated by the existing oil-water separation device still contains a certain amount of oil, which affects the subsequent water treatment and increases the difficulty and cost of post-treatment. Therefore, how to better treat this part of oil-containing wastewater has become the new focus of the inventor's research. SUMMARY

[0003] In view of the above problems, the utility model provides a kind of combustion furnace, including combustion chamber, combustion chamber rear part is provided with burner, burner below is provided with oil-water atomization spray head, oil-water atomization spray head is connected with oil-water storage tank by pipeline. The combustion furnace with this structure can be used as a heat source for waste cracking, and the oil-water mixture produced by waste cracking can be directly combusted in the combustion furnace. The stable high-temperature environment in the combustion furnace can ensure the complete combustion of the oil-water mixture, thereby solving the problem of difficult treatment of the oil-water mixture produced by cracking and greatly reducing the cost and difficulty of treatment.

[0004] The main idea of the utility model is that the inventor found in actual application that the oil content in oil-containing wastewater is not high, but it basically belongs to combustible components. If it can be directly combusted as fuel, it not only facilitates treatment but also realizes the comprehensive utilization of waste. Therefore, the inventor improves the existing combustion furnace and sends this part of oil-containing wastewater into the combustion chamber to be combusted with fuel, thereby achieving better treatment effect.

[0005] The specific technical scheme provided by the inventor is as follows:

[0006] A combustion furnace comprises a combustion chamber, the combustion chamber comprises a hearth and a flue gas outlet, a burner is arranged at the rear of the combustion chamber, an oil-water atomizing nozzle is arranged below the burner, and the oil-water atomizing nozzle is connected with an oil-water storage tank through a pipeline; the outlet of the burner and the outlet of the oil-water atomizing nozzle are both extended into the hearth.

[0007] The burner can directly adopt an existing conventional burner, and the inventor will not repeat it here, but the burner is respectively connected with a cracked residual oil pipeline, a compressed air pipeline and a natural gas pipeline, so that the burner of the present application can use natural gas as the only combustible component, and can also use the residual oil generated by cracking as an auxiliary combustible component. Because after the cracking oil is fractionated, part of the components still remain, which can be combined with natural gas for combustion. In order to ensure its fluidity, a heat preservation heating device such as electric heating and a heat preservation layer can be arranged on the cracked residual oil pipeline and the storage tank, so that it can be better mixed with natural gas in the burner. In addition, the burner can also be connected to the gaseous product storage tank generated by cracking through a pipeline. The combustible gaseous product generated during the cracking process can also be mixed with natural gas as fuel, and the inventor will not repeat it here. Of course, in order to better control the combustion process, the above-mentioned pipelines are all provided with corresponding control valves and flow calculation devices, so as to adjust the composition of the fuel in the combustion chamber, control the temperature of the exhaust flue gas, and use it as a heat source for cracking.

[0008] The oil-water atomizing nozzle used in the present application is used to better atomize and mix the oil-containing wastewater. The oil content in the oil-containing wastewater has certain fluctuations according to different cracking processes, but stratification will still occur in the oil-water storage tank, which is not conducive to combustion. Therefore, the inventor preferably arranges a stirring device or an external circulation device in the oil-water storage tank, the purpose of which is to make the oil and water mix more uniformly. When the oil-water mixture is sent into the oil-water atomizing nozzle, a more uniform mist of oil-water mixture can be produced. After the burner is ignited, high temperature will be generated in the combustion chamber. When the mist of oil-water mixture enters the combustion chamber, the water in it will instantaneously vaporize, and the oil component will mix with the fuel sprayed by the burner and burn, thereby realizing the instantaneous separation of oil and water. The vaporized water exists in the form of high-temperature steam and mixes with the flue gas generated by the fuel, and is sent into the heating cavity of the cracker to complete heating and then discharged from the heating cavity. Although the temperature of the flue gas is significantly reduced in this process, it is still higher than the boiling point of water. Therefore, the water in the exhaust flue gas discharged from the heating cavity still exists in the form of water vapor. This part of water vapor can be discharged together with the flue gas, and will not cause any pressure to the subsequent treatment. Moreover, the presence of this part of water vapor has an adsorption effect on the solid particles in the flue gas, which has a positive effect on environmental protection treatment.

[0009] The stirring device in the oil-water storage tank can be selected from a stirring paddle, which completes stirring under the drive of an external power. The external circulation device can be realized through an external circulation pump and a pipeline, and the inventor will not repeat it here.

[0010] In the technical scheme, the combustor is arranged above the oil-water atomizing nozzle, so that the fuel sprayed by the combustor can be mixed with the oil-water mist better, and the high temperature generated instantaneously can vaporize the water, thereby achieving better combustion effect.

[0011] In summary, the combustor with the structure can be used as a heat source for waste cracking, and the oil-water mixture generated by waste cracking can be directly combusted in the combustor, and the stable high-temperature environment in the combustor can ensure complete combustion of the oil-water mixture, thereby solving the problem that the oil-water mixture generated by cracking is difficult to handle, and greatly reducing the cost and difficulty of handling. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 FIG. 1 is a structural schematic view of the combustor,

[0013] Figure 2 FIG. 2 is a structural sectional view of the combustion chamber,

[0014] In the figure, 1 is a combustion chamber, 2 is an oil-water storage tank, 3 is a hearth, 4 is a heat preservation layer, 5 is a combustor, 5-1 is a cracking residual oil pipeline, 5-2 is a compressed air pipeline, 5-3 is a natural gas pipeline, 6 is an oil-water atomizing nozzle, and 7 is a flue gas outlet. DETAILED DESCRIPTION

[0015] The above content of the utility model will be further explained in detail through the specific implementation mode of the embodiment, and the technology realized based on the above content of the utility model belongs to the range of the utility model;

[0016] As shown in Figure 1 and 2 A combustor includes a combustion chamber 1, the combustion chamber 1 includes a hearth 3 and a flue gas outlet 7, the combustion chamber 1 is provided with a combustor 5 at the rear, the combustor 5 is provided with an oil-water atomizing nozzle 6 below, the oil-water atomizing nozzle 6 is connected with an oil-water storage tank 2 through a pipeline; the combustor 5 and the oil-water atomizing nozzle 6 are both inserted into the hearth 3.

[0017] The combustor 5 adopts an existing conventional combustor; the combustor 5 is respectively connected with a cracking residual oil pipeline 5-1, a compressed air pipeline 5-2 and a natural gas pipeline 5-3;

[0018] In addition, the combustor 5 can also be connected to a gaseous product storage tank generated by cracking through a pipeline, and the combustible gaseous product generated in the cracking process can also be mixed with natural gas as fuel.

[0019] Preferably, the pipelines are all provided with corresponding control valves and flow calculation devices.

[0020] The furnace chamber is provided with an outer heat preservation layer 4, which is a conventional design in the art and will not be described in detail.

[0021] The oil-water storage tank 2 is provided with a stirring device or an external circulation device; the stirring device can be selected from a stirring paddle, and the external circulation device can be realized by an external circulation pump and a pipeline.

[0022] The specific use process of the combustion furnace is as follows:

[0023] First, fuel is fed into the burner 5 through the cracking residual oil pipeline 5-1, the compressed air pipeline 5-2 and the natural gas pipeline 5-3, and the furnace 3 is ignited to generate high-temperature flue gas. Then, the oil-containing wastewater is atomized and mixed by the oil-water atomizing nozzle 6 and is fed into the furnace 3. Since there is high-temperature flue gas in the furnace 3 at this time, the water in the oil-water mixture will be instantly vaporized when it enters the combustion chamber 1, and the oil component will be mixed with the fuel injected by the burner 5 to burn, thereby realizing the instantaneous separation of oil and water. The vaporized water exists in the form of high-temperature steam and is mixed with the flue gas generated by the fuel, and is discharged from the flue gas outlet 7 as the heating heat source of the cracker. After being fed into the heating cavity of the cracker and discharged from the heating cavity, the temperature of the flue gas is obviously reduced, but it is still higher than the boiling point of water. Therefore, the water in the exhaust flue gas discharged from the heating cavity still exists in the form of water vapor. This part of water vapor can be discharged together with the flue gas, and will not cause any pressure to the subsequent treatment. Moreover, the presence of this part of water vapor has an adsorption effect on the solid particles in the flue gas, which has a positive effect on environmental protection treatment.

[0024] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art can make equivalent replacement or change according to the technical solution and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model.

Claims

1. A combustion furnace, comprising a combustion chamber (1), the combustion chamber (1) including a furnace chamber (3) and a flue gas outlet (7), characterized in that, A burner (5) is installed at the rear of the combustion chamber (1), and an oil-water atomizing nozzle (6) is installed below the burner (5). The oil-water atomizing nozzle (6) is connected to the oil-water storage tank (2) through a pipeline. The front outlets of the burner (5) and the oil-water atomizing nozzle (6) both extend into the furnace (3).

2. The combustion furnace according to claim 1, characterized in that: The burner (5) is connected to a pyrolysis residual oil pipeline (5-1), a compressed air pipeline (5-2), and a natural gas pipeline (5-3), respectively.

3. The combustion furnace according to claim 1, characterized in that: An agitator or external circulation device is installed inside the oil-water storage tank (2).

4. The combustion furnace according to claim 1, characterized in that: An insulation layer (4) is installed on the outside of the furnace (3).

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