Zeolite rotating wheel purification system applied to petroleum machinery paint spraying waste gas

Abstract

The utility model relates to a zeolite rotating wheel purification system applied to paint spraying waste gas of petroleum machinery. The zeolite rotating wheel purification system comprises a filtration and adsorption system and a desorption system, the filtration and adsorption system comprises an air inlet, a filter, a zeolite rotating wheel device, an air outlet and a system fan; the desorption system comprises a cooling air outlet pipeline, a catalytic combustion furnace, a desorption air inlet pipeline, a desorption air outlet pipeline and a desorption fan. The system can effectively treat the petroleum machinery paint spraying waste gas, the adsorption device can be regenerated, and the operation cost is low.

Description

Technical Field

[0001] The utility model relates to the field of atmospheric environmental protection management, in particular to a zeolite wheel purification system applied to waste gas from oil machinery painting. Background Art

[0002] In the field of petroleum machinery, a large number of castings, hydraulic parts and other components are used. The equipment is often used in harsh outdoor working conditions, and the equipment surface has strict requirements on high and low temperature resistance, UV resistance, corrosion resistance, rain resistance, dust resistance, etc. Therefore, the equipment surface painting performance is high, and the paint thickness is thicker than conventional spraying. At the same time, due to the large size and complex structure of the workpiece, a lot of paint is wasted during the spraying process, resulting in a large amount of paint being released into the environment. The paint contains a large amount of benzene, xylene, non-methane total hydrocarbons and other substances. If they are not controlled, it will cause serious environmental pollution and a serious threat to people's health.

[0003] Traditional methods for treating paint exhaust gas include RTO direct combustion method and adsorption method. Among them, RTO direct combustion method has a thorough purification effect and high efficiency, but its disadvantages are also obvious, such as high cost, high operating costs, high safety risks, and high requirements for operation and maintenance personnel; the adsorption method has low equipment cost, simple operation and maintenance, and is safe and risk-free, but it has disadvantages such as low purification efficiency, easy saturation of adsorbent, high cost of replacing activated carbon, large amount of hazardous waste, and inability to achieve stable emission standards when encountering high-concentration exhaust gas.

[0004] Due to the large amount of paint used in petroleum machinery, complex ingredients and high concentration, general exhaust gas treatment methods are difficult to meet emission requirements. Therefore, there is an urgent need for a treatment measure that can both stably meet emission standards and operate safely and at low cost. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a zeolite wheel purification system for oil machinery paint spraying exhaust gas, which can effectively treat oil machinery paint spraying exhaust gas, and the adsorption device can be regenerated, with low operating costs.

[0006] To achieve the purpose of the utility model, the utility model provides a zeolite rotor purification system for oil machinery paint spraying exhaust gas, including a filtering adsorption system and a desorption system; the filtering adsorption system includes an air inlet, a filter, a zeolite rotor device, an air outlet and a system fan, the air inlet, the filter, the zeolite rotor device and the air outlet are connected in sequence, the system fan is connected between any two adjacent ones of the air inlet, the filter, the zeolite rotor device and the air outlet, the zeolite rotor device can rotate and has a first end facing the air inlet and a second end away from the air inlet; the desorption system includes a cooling air outlet duct, a catalytic converter, a cooling fan ... A combustion furnace, a desorption air inlet duct, a desorption air outlet duct and a desorption fan, the catalytic combustion furnace includes a catalytic combustion device and a heat exchange device, the cooling air outlet duct is connected to the second end of the zeolite rotor device and the heat exchange device, the cooling air outlet duct is communicated with the air inlet via the zeolite rotor device, the desorption air inlet duct is connected to the heat exchange device and the second end of the zeolite rotor device, the desorption air inlet duct is communicated with the desorption air outlet duct via the zeolite rotor device, the desorption air outlet duct is connected to the first end of the zeolite rotor device and the catalytic combustion device, and the desorption fan is connected between the desorption air outlet duct and the catalytic combustion device.

[0007] In some embodiments of the present invention, the system fan is connected between the air outlet and the zeolite rotor device, and the air outlet includes a chimney arranged above the system fan.

[0008] In some embodiments of the present invention, the zeolite rotor device is arranged opposite to the catalytic combustion furnace, and the system fan and the chimney are located between the zeolite rotor device and the catalytic combustion furnace.

[0009] In some embodiments of the present invention, the desorption air inlet duct and the desorption air outlet duct are arranged opposite to each other, and the chimney is located between the desorption air inlet duct and the desorption air outlet duct.

[0010] In some embodiments of the present invention, the cooling air outlet duct and the desorption air inlet duct are located on the same side of the chimney.

[0011] In some embodiments of the present invention, the filter is a multi-stage dry filter.

[0012] In some embodiments of the present invention, the filtration and adsorption system further comprises an air inlet pipe, wherein the air inlet pipe is connected to the second end of the zeolite rotor device and the system fan, and the air inlet pipe is in communication with the air inlet via the zeolite rotor device.

[0013] In some embodiments of the present invention, the zeolite rotor device includes a separated desorption zone and a cooling zone, the cooling air outlet duct is connected to the air inlet in the cooling zone through the zeolite rotor device, and the desorption air inlet duct is connected to the desorption air outlet duct in the desorption zone through the zeolite rotor device.

[0014] In some embodiments of the present invention, the filtration and adsorption system also includes an adsorption shell, the zeolite wheel device is arranged in the adsorption shell, and the cooling air outlet duct, the desorption air inlet duct and the desorption air outlet duct are respectively connected to the top of the adsorption shell.

[0015] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0016] The zeolite rotor purification system of the utility model mainly includes a filtration adsorption system and a desorption system. The filtration adsorption system can effectively remove particulate matter and organic pollutants such as benzene, xylene, and non-methane total hydrocarbons in the exhaust gas of petroleum machinery spray painting through double treatment of filtration and adsorption by a zeolite rotor device, thereby effectively treating the exhaust gas of petroleum machinery spray painting; the desorption system is used to desorb the organic pollutants adsorbed by the zeolite rotor device and catalyze combustion to completely degrade the organic pollutants, thereby promoting the regeneration of the zeolite rotor device, avoiding the need to replace the adsorbent, and reducing the operating cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the zeolite wheel purification system of the utility model at a first angle.

[0018] Figure 2 It is a schematic structural diagram of an embodiment of the zeolite wheel purification system of the utility model at a first angle.

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0020] like Figure 1 and 2 As shown, this embodiment provides a zeolite wheel purification system, which has the function of treating waste gas and promoting the regeneration of the adsorption device, effectively removing particulate matter and organic pollutants in the waste gas, and can be used for a long time without replacing the adsorption material, thereby reducing costs and enabling the zeolite wheel purification system to continuously and stably treat waste gas. The zeolite wheel purification system of this embodiment is particularly suitable for treating waste gas from oil machinery spray painting. Of course, the zeolite wheel purification system of this embodiment can also be used for treating other industrial waste gases.

[0021] Specifically, the zeolite wheel purification system of the present embodiment includes a filter adsorption system 10 and a desorption system 20. The filter adsorption system 10 is mainly used for exhaust gas treatment, and the desorption system 20 is mainly used for regeneration of the adsorption device in the filter adsorption system 10. The filter adsorption system 10 and the desorption system 20 may not work at the same time. For example, after the filter adsorption system 10 has been running for a preset time or when there is no exhaust gas treatment demand, the filter adsorption system 10 is stopped, and the desorption system 20 is started again to regenerate the adsorption device in the filter adsorption system 10, thereby avoiding the need to frequently replace the adsorption material, improving the use continuity and stability of the zeolite wheel purification system, and reducing the operating cost.

[0022] Among them, the filtering and adsorption system 10 includes an air inlet 11, a filter 12, a zeolite wheel device 13, an air outlet 14 and a system fan 15. The air inlet 11 is used to introduce exhaust gas; the filter 12 is used to remove particulate matter in the exhaust gas; the zeolite wheel device 13 is a rotatable wheel-shaped adsorption device with zeolite as the adsorption material. Zeolite has the advantages of good adsorption capacity and high temperature resistance, and can be repeatedly regenerated at high temperature; the air outlet 14 is used to discharge the gas that has been filtered and adsorbed, and the gas that has been filtered and adsorbed meets the emission standards; the system fan 15 is used to provide power for air flow. The air inlet 11, the filter 12, the zeolite wheel device 13 and the air outlet 14 are connected in sequence, so that the exhaust gas passes through the filter 12 and the zeolite wheel device 13 in sequence for filtering and adsorption treatment, respectively, to remove particulate matter and pollutants in the exhaust gas. The system fan 15 is connected between any two adjacent ones of the air inlet 11, the filter 12, the zeolite wheel device 13 and the air outlet 14, as long as it can cause the air to flow through the above components in sequence. The zeolite wheel device 13 can rotate to facilitate adsorption and desorption of the zeolite wheel device 13. The zeolite wheel device 13 has a first end 13a facing the air inlet 11 and a second end 13b away from the air inlet 11. During the adsorption process, the exhaust gas passes through the filter 12 and then passes through the zeolite wheel device 13 itself from the first end 13a to reach the second end 13b to complete the adsorption.

[0023] When the filtration and adsorption system 10 is working, the exhaust gas enters the filter 12 from the air inlet 11, and is removed by the filter 12 for substances such as fine dust and particulate matter to prevent clogging of subsequent equipment. The exhaust gas then enters the zeolite wheel device 13 for adsorption to remove total harmful substances in the exhaust gas. The clean exhaust gas flows out from the air outlet 14 under the action of the system fan 15 and is discharged into the air.

[0024] The desorption system 20 includes a cooling air outlet duct 21, a catalytic combustion furnace 22, a desorption air inlet duct 23, a desorption air outlet duct 24 and a desorption fan 25. The cooling air outlet duct 21 is used to provide air for desorption; the catalytic combustion furnace 22 can provide heat exchange and catalytic combustion functions; the desorption air inlet duct 23 is used to provide hot air for desorption; the desorption air outlet duct 24 is used to output the air with organic pollutants after desorption; and the desorption fan 25 is used to provide power for gas flow. The catalytic combustion furnace 22 includes a catalytic combustion device and a heat exchange device. The catalytic combustion device can be a high-temperature combustion device with a catalytic bed, which can decompose organic pollutants. The heat exchange device can be a heat exchange tube that passes through the catalytic combustion device, which is separated from the catalytic combustion device and can exchange heat with the catalytic combustion device. The cooling air outlet duct 21 is connected to the second end 13b of the zeolite rotor device 13 and the heat exchange device. The cooling air outlet duct 21 is connected to the air inlet 11 through the zeolite rotor device 13. The cooling air outlet duct 21 introduces cooling air for cooling the zeolite rotor device 13, for example, cooling air introduced from the air inlet 11 for cooling the part of the zeolite rotor device 13 after high-temperature desorption, into the heat exchange device, so that the air exchanges heat with the catalytic combustion device in the heat exchange device to obtain high-temperature air. The desorption air inlet duct 23 is connected to the heat exchange device. The heat device and the second end 13b of the zeolite rotor device 13, the desorption air inlet duct 23 introduces the high-temperature air after heat exchange into the zeolite rotor device 13 for desorption; the desorption air inlet duct 23 is connected to the desorption air outlet duct 24 across the zeolite rotor device 13, so that the air with pollutants after desorption enters the desorption air outlet duct 24; the desorption air outlet duct 24 connects the first end 13a of the zeolite rotor device 13 and the catalytic combustion device, so as to introduce the air with pollutants after desorption into the catalytic combustion device for catalytic combustion decomposition. The desorption fan 25 is connected between the desorption air outlet duct 24 and the catalytic combustion device, and provides power for the air to pass through the cooling air outlet duct 21, the desorption air inlet duct 23, and the desorption air outlet duct 24 in sequence.

[0025] When the desorption system 20 is working, the zeolite wheel device 13 rotates slowly all the time. Under the action of the desorption fan 10, the desorption airflow enters the heat exchange device of the catalytic combustion furnace 22 from the cooling air outlet duct 21. After heat exchange, the temperature is increased and then it enters the zeolite wheel device 13 in the opposite direction through the desorption air inlet duct 23 for desorption, and the adsorbed harmful substances are analyzed. Then, it enters the catalytic combustion device of the catalytic combustion furnace 22 through the desorption air outlet duct 24 for catalytic combustion, so that the exhaust gas is converted into carbon dioxide and water, and then discharged.

[0026] In some examples, the system fan 15 is connected between the air outlet 14 and the zeolite wheel device 13, that is, the system fan 15 is located at the end of the filtering and adsorption process to prevent the system fan 15 from being contaminated by pollutants and affecting the life of the fan. The air outlet 14 includes a chimney located above the system fan 15 to discharge the treated exhaust gas upward to prevent the airflow from affecting the surrounding environment.

[0027] In some examples, the zeolite wheel device 13 is arranged opposite to the catalytic combustion furnace 22, and the zeolite wheel device 13 can be located on the side of the catalytic combustion furnace 22 away from the filter 12, so that a space is formed between the zeolite wheel device 13 and the catalytic combustion furnace 22, and the system fan 15 and the chimney are located between the zeolite wheel device 13 and the catalytic combustion furnace 22 and accommodated in the space. The above layout can reduce the overall size of the zeolite wheel purification system, such as the size in the direction perpendicular to the airflow.

[0028] In some examples, the attached air inlet duct 23 and the desorption air outlet duct 24 are arranged relatively to each other, and the chimney is located between the desorption air inlet duct 23 and the desorption air outlet duct 24, so that the system fan 15 and the chimney are located in the middle position between the zeolite wheel device 13 and the catalytic combustion furnace 22, thereby reducing the footprint of the zeolite wheel purification system.

[0029] In some examples, the cooling air outlet duct 21 and the desorption air inlet duct 23 are located on the same side of the chimney, making the airflow duct layout more reasonable.

[0030] In some examples, the filter 12 is a multi-stage dry filter 12, which can improve filtering efficiency.

[0031] In some examples, the filtration adsorption system 10 also includes an air inlet pipe 17, which connects the second end 13b of the zeolite rotor device 13 and the system fan 15. The air inlet pipe 17 is connected to the air inlet 11 through the zeolite rotor device 13, and the zeolite rotor device 13 and the system fan 15 are maintained by the air inlet pipe 17.

[0032] In some examples, the zeolite rotor device 13 includes a separated desorption zone and a cooling zone. The zeolite rotor device 13 can pass through the desorption zone and the cooling zone in sequence during the rotation process. The desorption zone is used for desorption regeneration of the zeolite rotor device 13, and the cooling zone is used to cool the zeolite rotor device 13 after desorption. The cooling air outlet duct 21 is connected to the air inlet 11 in the cooling zone across the zeolite rotor device 13, and the desorption air inlet duct 23 is connected to the desorption air outlet duct 24 in the desorption zone across the zeolite rotor device 13. Using the air used for cooling the zeolite rotor device 13 as the desorption airflow, the organic pollutants that may be desorbed during the cooling process can be further removed, while avoiding the need to set multiple air inlets and outlets for the desorption airflow.

[0033] In some examples, the filtration adsorption system 10 also includes an adsorption shell 16, the zeolite wheel device 13 is disposed in the adsorption shell 16, and the cooling air outlet duct 21, the desorption air inlet duct 23 and the desorption air outlet duct 24 are respectively connected to the top of the adsorption shell 16, so as to facilitate the arrangement of air circulation ducts at the upper end of the system.

[0034] Finally, it should be emphasized that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A zeolite wheel purification system for waste gas from oil machinery spray painting, characterized in that Including filtration adsorption system and desorption system; The filtration and adsorption system comprises an air inlet, a filter, a zeolite wheel device, an air outlet and a system fan, wherein the air inlet, the filter, the zeolite wheel device and the air outlet are connected in sequence, and the system fan is connected between any two adjacent ones of the air inlet, the filter, the zeolite wheel device and the air outlet, and the zeolite wheel device is rotatable and has a first end facing the air inlet and a second end away from the air inlet; The desorption system includes a cooling air outlet duct, a catalytic combustion furnace, a desorption air inlet duct, a desorption air outlet duct and a desorption fan. The catalytic combustion furnace includes a catalytic combustion device and a heat exchange device. The cooling air outlet duct is connected to the second end of the zeolite rotor device and the heat exchange device. The cooling air outlet duct is communicated with the air inlet via the zeolite rotor device. The desorption air inlet duct is connected to the heat exchange device and the second end of the zeolite rotor device. The desorption air inlet duct is communicated with the desorption air outlet duct via the zeolite rotor device. The desorption air outlet duct is connected to the first end of the zeolite rotor device and the catalytic combustion device. The desorption fan is connected between the desorption air outlet duct and the catalytic combustion device.

2. The zeolite wheel purification system for oil machinery paint spraying exhaust gas according to claim 1 is characterized in that The system fan is connected between the air outlet and the zeolite rotor device, and the air outlet includes a chimney arranged above the system fan.

3. The zeolite wheel purification system for oil machinery paint spraying exhaust gas according to claim 2 is characterized in that The zeolite wheel device is arranged opposite to the catalytic combustion furnace, and the system fan and the chimney are located between the zeolite wheel device and the catalytic combustion furnace.

4. The zeolite wheel purification system for oil machinery paint spraying exhaust gas according to claim 3 is characterized in that The desorption air inlet duct and the desorption air outlet duct are arranged opposite to each other, and the chimney is located between the desorption air inlet duct and the desorption air outlet duct.

5. The zeolite wheel purification system for oil machinery paint spraying exhaust gas according to claim 4 is characterized in that The cooling air outlet duct and the desorption air inlet duct are located on the same side of the chimney.

6. A zeolite wheel purification system for oil machinery paint spraying exhaust gas according to any one of claims 1 to 5, characterized in that The filter is a multi-stage dry filter.

7. A zeolite wheel purification system for oil machinery paint spraying exhaust gas according to any one of claims 1 to 5, characterized in that The filtration and adsorption system further comprises an air inlet pipe, wherein the air inlet pipe is connected to the second end of the zeolite wheel device and the system fan, and the air inlet pipe is in communication with the air inlet via the zeolite wheel device.

8. A zeolite wheel purification system for oil machinery paint spraying exhaust gas according to any one of claims 1 to 5, characterized in that The zeolite rotor device comprises a separated desorption zone and a cooling zone, the cooling air outlet duct is connected with the air inlet in the cooling zone through the zeolite rotor device, and the desorption air inlet duct is connected with the desorption air outlet duct in the desorption zone through the zeolite rotor device.

9. A zeolite wheel purification system for oil machinery paint spraying exhaust gas according to any one of claims 1 to 5, characterized in that The filtration and adsorption system further comprises an adsorption shell, the zeolite wheel device is arranged in the adsorption shell, and the cooling air outlet duct, the desorption air inlet duct and the desorption air outlet duct are respectively connected to the top of the adsorption shell.

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