Waste oil distillation base oil diesel tail gas treatment system

Abstract

The utility model relates to a waste oil distillation base oil diesel tail gas treatment system, and relates to the technical field of tail gas treatment equipment.The tail gas treatment system comprises a spraying adsorption device, a combustion device and a secondary spraying device, the combustion device is used for carrying out high-temperature combustion treatment on the tail gas discharged by the spraying adsorption device, and the secondary spraying device is used for cooling and re-purifying the tail gas discharged by the combustion device and discharging the tail gas. Tail gas generated after waste oil treatment is discharged into the spraying adsorption device to be subjected to spraying treatment, the content of particulate matter and soluble organic matter in the tail gas is reduced, and then the tail gas subjected to spraying treatment is subjected to combustion treatment through the combustion device to remove organic compounds in the tail gas; and finally, the combusted tail gas is cooled and purified through the secondary spraying device, so that the tail gas reaches the emission standard, the tail gas treatment cost is reduced, and the tail gas treatment effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of tail gas treatment equipment, and in particular to a waste oil distillation base oil diesel tail gas treatment system. Background Art

[0002] Waste oil distillation is a key process for recovering base oil and diesel. During the distillation process, the organic waste gas produced contains a variety of volatile organic compounds (VOCs) and other harmful substances. Direct discharge can have a serious impact on the atmospheric environment.

[0003] Traditional tail gas treatment methods primarily include activated carbon adsorption and direct combustion, but these methods lack efficiency, equipment complexity, and operating costs. For example, activated carbon adsorption requires frequent adsorbent replacement, resulting in high operating costs, while direct combustion can easily lead to localized high temperatures and incomplete combustion, resulting in secondary pollution.

[0004] Existing technologies mostly use a single adsorption or combustion treatment method, but these methods have problems such as incomplete treatment, high energy consumption, and high operating costs. Therefore, there is an urgent need to design a treatment system that is low-cost and can improve the exhaust gas treatment effect. Utility Model Content

[0005] In order to reduce the cost of exhaust gas treatment and improve the treatment effect of exhaust gas, the present application provides a waste oil distillation base oil diesel exhaust gas treatment system.

[0006] This application provides a waste oil distillation base oil diesel exhaust treatment system, which adopts the following technical solutions:

[0007] A waste oil distillation base oil diesel exhaust gas treatment system includes a spray adsorption device, a combustion device and a secondary spray device. The spray adsorption device is used to spray and adsorb the exhaust gas, the combustion device is used to perform high-temperature combustion treatment on the exhaust gas discharged by the spray adsorption device, and the secondary spray device is used to cool and re-purify the exhaust gas discharged by the combustion device before discharging it.

[0008] By adopting the above technical solution, the exhaust gas generated after waste oil treatment enters the spray adsorption device, and the exhaust gas is sprayed by the spray adsorption device to reduce the content of particulate matter and soluble organic matter in the exhaust gas. The exhaust gas after spraying treatment is then burned by the combustion device to remove organic compounds in the exhaust gas by combustion. Finally, the exhaust gas after combustion is cooled and purified by the secondary spray device, so that the exhaust gas meets the emission standards, reduces the exhaust gas treatment cost and improves the exhaust gas treatment effect.

[0009] Furthermore, the spray adsorption device includes:

[0010] A tower body, wherein the interior of the tower body is hollow and is used to contain the exhaust gas;

[0011] A first-stage spray assembly, wherein a plurality of groups of the first-stage spray assemblies are arranged at intervals within the tower body and are used to perform multi-stage spray treatment on the tail gas;

[0012] A primary circulator is provided on the tower body and communicates with the interior of the tower body, and is used to process the spray liquid discharged from the tower body and then re-discharge it into the primary spray assembly for further spraying treatment;

[0013] An exhaust pipe is arranged on the tower body and is used to discharge the tail gas after spraying.

[0014] By adopting the above technical solution, the exhaust gas is discharged into the end of the tower body near the bottom, and the exhaust gas passes through multiple groups of first-level spray components in turn and is finally discharged from the tower body from the exhaust pipe. The first-level circulator circulates the spray liquid in the tower body and then discharges it into the first-level spray component. The spray liquid is sprayed from top to bottom through the first-level spray component and moves in the opposite direction to the exhaust gas, so as to remove the particulate matter and soluble organic matter in the exhaust gas through the spray liquid, thereby reducing the content of particulate matter and soluble organic matter in the exhaust gas.

[0015] Furthermore, the first-level spray assembly includes:

[0016] A packing pad, the packing pad being arranged in the tower body and allowing the spray liquid to pass through the packing pad;

[0017] A packing layer, the packing layer being arranged on the packing pad and used to increase the effective contact area between the exhaust gas and the spray liquid;

[0018] A first-stage spray head is arranged in the tower body and located above the packing layer. The first-stage spray head is used to spray spray liquid onto the packing layer.

[0019] By adopting the above technical solution, the first-level spray head sprays the spray liquid evenly onto the packing layer, the exhaust gas and the spray liquid are fully in contact in the packing layer, and finally the spray liquid flows the particulate matter in the exhaust gas and the soluble organic matter dissolved in the spray liquid into the tower body through the packing pad, thereby removing the particulate matter and soluble organic matter in the exhaust gas.

[0020] Furthermore, a demister plate is provided on the top of the tower body, and the demister plate is used to reduce the water mist content of the exhaust gas entering the exhaust pipe.

[0021] By adopting the above technical solution, when the exhaust gas after spraying passes through the demister plate, the demister plate blocks and condenses the water mist in the exhaust gas, thereby ultimately reducing the water mist content of the exhaust gas entering the exhaust pipe.

[0022] Furthermore, the combustion device comprises:

[0023] A combustion chamber, wherein the combustion chamber is used to burn the tail gas after preliminary treatment by the spray adsorption device;

[0024] The oxygen supply pipe is connected to the interior of the combustion chamber and is used to supply oxygen into the combustion chamber.

[0025] By adopting the above technical solution, the oxygen supply pipe introduces oxygen into the combustion chamber, so that the combustibles in the exhaust gas are fully burned in the combustion chamber, and the exhaust gas is then burned.

[0026] Furthermore, a heat recovery device for absorbing heat energy generated during combustion is provided outside the combustion chamber, and the heat recovery device can preheat the exhaust gas in the exhaust pipe.

[0027] By adopting the above technical solution, the heat generated when the exhaust gas burns in the combustion chamber is recovered by the heat recovery device, and then the recovered heat energy is transferred to the exhaust pipe, so as to preheat the exhaust gas in the exhaust pipe, thereby increasing the initial temperature of the exhaust gas entering the combustion chamber and improving the exhaust gas combustion efficiency.

[0028] Furthermore, the secondary spraying device includes:

[0029] A spray tower, which is hollow inside and is used to contain the exhaust gas after combustion treatment;

[0030] A secondary spray assembly is provided in the spray tower and is used to spray the exhaust gas after combustion;

[0031] The secondary circulator is arranged on the spray tower and is connected to the inside of the spray tower. The secondary circulator is used to process the spray liquid discharged from the spray tower and then discharge it back into the secondary spray assembly for re-spraying treatment.

[0032] By adopting the above technical solution, the exhaust gas after combustion enters the spray tower, and the exhaust gas in the spray tower is sprayed by the secondary spray assembly in the spray tower. The secondary circulator circulates the spray liquid in the spray tower to cool the exhaust gas after combustion, and the spray liquid purifies the exhaust gas after combustion.

[0033] Furthermore, the secondary spraying device is provided with a drying device for drying the tail gas discharged from the secondary spraying device, and the drying device is used to reduce the moisture in the tail gas.

[0034] By adopting the above technical solution, the drying device dries the tail gas discharged from the secondary spraying device, thereby reducing the moisture content in the tail gas and preventing humidity problems caused by the discharge.

[0035] Furthermore, an emission monitoring device for real-time monitoring of exhaust gas components is provided on the exhaust port of the drying device.

[0036] By adopting the above technical solution, the exhaust gas components are monitored in real time through the emission monitoring device to ensure the treatment effect of the system and the emission standards are met, so as to facilitate timely feedback and adjustment of process parameters.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] The tail gas generated after waste oil treatment enters the spray adsorption device, and the tail gas is sprayed by the spray adsorption device to reduce the content of particulate matter and soluble organic matter in the tail gas. The tail gas after spray treatment is then burned by the combustion device to remove organic compounds in the tail gas. Finally, the tail gas after combustion is cooled and purified by the secondary spray device, so that the tail gas meets the emission standards, reduces the cost of tail gas treatment and improves the treatment effect of waste oil distillation base oil diesel tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the exhaust gas treatment system of the present application, wherein the direction of the arrow represents the direction of exhaust gas flow;

[0040] Figure 2 It is a schematic diagram of the cross-sectional structure of the spray adsorption device of the present application.

[0041] Figure numerals: 1. spray adsorption device; 11. tower body; 12. primary spray assembly; 121. packing pad; 122. packing layer; 123. primary spray head; 13. primary circulator; 14. exhaust pipe; 2. demister plate; 3. combustion device; 4. heat recovery device; 5. secondary spray device; 51. spray tower; 52. secondary circulator; 6. drying device; 7. emission monitoring device. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-2 This application is described in further detail.

[0043] The embodiment of the present application discloses a waste oil distillation base oil diesel exhaust treatment system.

[0044] Reference Figure 1 A waste oil distillation base oil diesel exhaust treatment system includes a spray adsorption device 1, a combustion device 3 and a secondary spray device 5. The spray adsorption device 1 is used to spray and adsorb the exhaust gas, the combustion device 3 is used to perform high-temperature combustion treatment on the exhaust gas discharged from the spray adsorption device 1, and the secondary spray device 5 is used to cool and purify the exhaust gas discharged from the combustion device 3 before discharging it.

[0045] Reference Figure 1 and Figure 2 The spray adsorption device 1 includes a tower body 11, a first-level spray assembly 12, a first-level circulator 13 and an exhaust pipe 14. The tower body 11 is a cylindrical structure. The interior of the tower body 11 is hollow. The tower body 11 is vertically fixed on the ground to facilitate the collection of the exhaust gas. The first-level spray assembly 12 is arranged in the tower body 11. The first-level spray assembly 12 is used to spray the exhaust gas. In order to improve the spray adsorption effect of the exhaust gas, multiple groups of first-level spray assemblies 12 are installed at intervals in the height direction of the tower body 11 to perform multi-stage spray treatment on the exhaust gas. The first-level circulator 13 is fixedly installed on the tower body 11, and the primary circulator 13 is connected to the inside of the tower body 11. The primary circulator 13 is used to discharge the first spray liquid at the bottom of the tower body 11, and then the primary circulator 13 filters and removes impurities on the discharged spray liquid to reduce the content of particulate matter and soluble organic matter entering the spray liquid. Then the primary circulator 13 pressurizes the treated spray liquid and re-discharges it into the primary spray assembly 12, so as to circulate and spray the spray liquid in the tower body 11; the exhaust pipe 14 is fixedly installed on the top of the tower body 11 to discharge the exhaust gas after spraying.

[0046] Reference Figure 1 and Figure 2 The tail gas of waste oil distillation base oil diesel enters the tower body 11 from one end near the bottom of the tower body 11 and passes through multiple groups of first-level spray components 12 in sequence. The first-level spray components 12 include a packing plate 121, a packing layer 122 and a first-level spray head 123. The packing plate 121 is fixedly mounted on the side wall of the tower body 11. The axis of the packing plate 121 coincides with the axis of the tower body 11. The packing plate 121 is provided with multiple groups of small holes to facilitate the passage of the tail gas and the spray liquid. The packing layer 122 is fixedly mounted on the packing plate 121 and pressed against the side wall of the tower body 11. The material layer 122 is used to increase the effective contact area between the exhaust gas and the spray liquid, thereby improving the spray adsorption effect of the spray liquid on the exhaust gas; the first-level spray head 123 is fixedly installed in the tower body 11, and the first-level spray head 123 is located above the packing layer 122 and has a certain gap with the side wall of the tower body 11. The first-level spray head 123 sprays the spray liquid evenly onto the packing layer 122, so that the spray liquid repeatedly contacts the exhaust gas on the packing layer 122, and then sprays and adsorbs the particulate matter and soluble organic matter in the exhaust gas; the packing layer 122 of this embodiment is composed of stacked pp multi-faceted hollow balls.

[0047] Reference Figure 1 and Figure 2 After the exhaust gas passes through multiple groups of first-level spray assemblies 12, in order to reduce the water mist content in the exhaust gas, a demister plate 2 is fixedly installed on the top of the tower body 11. When the exhaust gas after spraying passes through the demister plate 2, the demister plate 2 blocks and condenses the water mist in the exhaust gas, and finally reduces the water mist content of the exhaust gas entering the exhaust pipe 14.

[0048] Reference Figure 1 The combustion device 3 includes a combustion chamber and an oxygen supply pipe. The exhaust gas discharged from the exhaust pipe 14 enters the combustion chamber. The exhaust gas that has been preliminarily treated by the spray adsorption device 1 is burned in the combustion chamber. The oxygen supply pipe is connected to the inside of the combustion chamber. The oxygen supply pipe is used to supply oxygen to the combustion chamber, so as to make the exhaust gas in the combustion chamber burn more fully.

[0049] Reference Figure 1 A heat recovery device 4 is fixedly installed outside the combustion chamber. The heat recovery device 4 is used to absorb the heat energy generated during combustion. The heat recovery device 4 can preheat the exhaust gas in the exhaust pipe 14, thereby increasing the initial temperature of the exhaust gas entering the combustion chamber and improving the exhaust gas combustion efficiency; at the same time, the heat recovery device 4 also heats the treated spray liquid in the primary circulator 13, thereby increasing the temperature of the spray liquid, and ultimately improving the spray adsorption effect of the spray liquid on the exhaust gas.

[0050] Reference Figure 1 and Figure 2 The secondary spray device 5 includes a spray tower 51, a secondary spray assembly and a secondary circulator 52. The spray tower 51 is a hollow cylindrical structure. The spray tower 51 is used to hold the exhaust gas after combustion; the secondary spray assembly is fixedly installed in the spray tower 51. The structure of the secondary spray assembly is the same as that of the primary spray assembly 12. The secondary spray assembly is used to spray the exhaust gas after combustion, thereby cooling and further purifying the exhaust gas after combustion; the secondary circulator 52 is fixedly installed on the spray tower 51. The secondary circulator 52 is connected to the inside of the spray tower 51. The secondary circulator 52 is used to process the spray liquid discharged from the spray tower 51 and then discharge it back into the secondary spray assembly for re-spraying treatment; a demisting plate 2 is also provided in the spray tower 51 of this embodiment.

[0051] Reference Figure 1 A drying device 6 for drying the exhaust gas discharged from the secondary spraying device 5 is fixedly installed on the secondary spraying device 5. The drying device 6 reduces the moisture in the exhaust gas, prevents the humidity problem caused by the exhaust gas emission, and ensures that the exhaust gas can meet the emission standards; the drying device 6 of this embodiment adopts one of adsorption drying or heating drying to dry the exhaust gas.

[0052] Reference Figure 1 In order to ensure that the final exhaust gas meets the emission standards, an emission detection device for real-time monitoring of the exhaust gas components is fixedly installed on the exhaust port of the drying device 6. The exhaust gas components are monitored in real time through the emission monitoring device 7 to ensure that the system's treatment effect and emission standards meet the standards, so as to facilitate timely feedback and adjustment of process parameters.

[0053] The working principle of the embodiment of this application is as follows:

[0054] The tail gas generated after the waste oil treatment enters the spray adsorption device 1, and the tail gas is sprayed by the spray adsorption device 1 to reduce the content of particulate matter and soluble organic matter in the tail gas. Then, the tail gas after the spray treatment is burned by the combustion device 3, and the organic compounds in the tail gas are removed by combustion. Finally, the tail gas after combustion is cooled and purified by the secondary spray device 5, so that the tail gas meets the emission standards, reduces the cost of tail gas treatment and improves the treatment effect of the tail gas.

[0055] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A waste oil distillation base oil diesel exhaust treatment system, characterized by: The invention comprises a spray adsorption device (1), a combustion device (3) and a secondary spray device (5), wherein the spray adsorption device (1) is used for spray adsorption treatment of the exhaust gas, the combustion device (3) is used for high-temperature combustion treatment of the exhaust gas discharged from the spray adsorption device (1), and the secondary spray device (5) is used for cooling and re-purifying the exhaust gas discharged from the combustion device (3) and discharging it.

2. The waste oil distillation base oil diesel exhaust treatment system according to claim 1, characterized in that: The spray adsorption device (1) comprises: A tower body (11), wherein the tower body (11) is hollow and is used to contain the exhaust gas; A first-stage spray assembly (12), wherein a plurality of groups of the first-stage spray assemblies (12) are arranged at intervals within the tower body (11) and are used to perform multi-stage spray treatment on the tail gas; a primary circulator (13), the primary circulator (13) being arranged on the tower body (11) and being in communication with the interior of the tower body (11), the primary circulator (13) being used to process the spray liquid discharged from the tower body (11) and then re-discharge it into the primary spray assembly (12) for further spraying treatment; An exhaust pipe (14) is provided on the tower body (11) and is used to discharge the exhaust gas after spraying.

3. The waste oil distillation base oil diesel exhaust treatment system according to claim 2, characterized in that: The first-level spray assembly (12) includes: A packing pad (121), the packing pad (121) being arranged in the tower body (11), and the packing pad (121) being capable of allowing spray liquid to pass through; a packing layer (122), the packing layer (122) being arranged on the packing pad (121) and used to increase the effective contact area between the exhaust gas and the spray liquid; A first-level spray head (123) is arranged in the tower body (11) and located above the packing layer (122). The first-level spray head (123) is used to spray a spray liquid onto the packing layer (122).

4. The waste oil distillation base oil diesel exhaust treatment system according to claim 3, characterized in that: A demister plate (2) is provided on the top of the tower body (11), and the demister plate (2) is used to reduce the water mist content of the exhaust gas entering the exhaust pipe (14).

5. The waste oil distillation base oil diesel exhaust treatment system according to claim 1, characterized in that: The combustion device (3) comprises: A combustion chamber, the combustion chamber being used to burn the tail gas after preliminary treatment by the spray adsorption device (1); The oxygen supply pipe is connected to the interior of the combustion chamber and is used to supply oxygen into the combustion chamber.

6. The waste oil distillation base oil diesel exhaust treatment system according to claim 5, characterized in that: A heat recovery device (4) for absorbing heat energy generated during combustion is provided outside the combustion chamber, and the heat recovery device (4) can preheat the exhaust gas in the exhaust pipe (14).

7. The waste oil distillation base oil diesel exhaust treatment system according to claim 5, characterized in that: The secondary spraying device (5) comprises: A spray tower (51), wherein the spray tower (51) is hollow inside and is used to contain the exhaust gas after combustion treatment; A secondary spray assembly, the secondary spray assembly being arranged in a spray tower (51) and being used for spraying the exhaust gas after combustion; A secondary circulator (52) is provided on the spray tower (51) and is in communication with the interior of the spray tower (51). The secondary circulator (52) is used to process the spray liquid discharged from the spray tower (51) and then re-discharge it into the secondary spray assembly for further spraying.

8. The waste oil distillation base oil diesel exhaust treatment system according to claim 1, characterized in that: The secondary spraying device (5) is provided with a drying device (6) for drying the tail gas discharged from the secondary spraying device (5), and the drying device (6) is used to reduce the moisture in the tail gas.

9. The waste oil distillation base oil diesel exhaust treatment system according to claim 8, characterized in that: An emission monitoring device (7) for real-time monitoring of exhaust gas components is provided on the exhaust port of the drying device (6).

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