Treatment device for oil-containing waste gas with low gas volume, high temperature and high freezing point

Abstract

The utility model relates to a treatment device for oil-containing waste gas with low gas volume, high temperature and high freezing point, which comprises a reaction kettle (1), an air floatation tank (2), a fan (3), a water removal device (4), an activated carbon adsorption device (5) and an exhaust funnel (6), a waste gas outlet of the reaction kettle (1) is connected with a waste gas inlet of the air floatation tank (2), a flame arrester (9) is arranged between the waste gas outlet of the reaction kettle (1) and the waste gas inlet of the air floatation tank (2), and a sealing cover (14) is covered on the air floatation tank (2). A waste gas outlet of the air floatation tank (2) is connected with a waste gas inlet of the water removal device (4) through the fan (3), a waste gas outlet of the water removal device (4) is connected with a waste gas inlet of the activated carbon adsorption device (5), and a tail gas outlet of the activated carbon adsorption device (5) is connected with the exhaust funnel (6) so as to exhaust tail gas through the exhaust funnel (6). The device can effectively treat the white oil waste gas in the gas discharged by the reaction kettle, meets the standard discharge requirement of the waste gas, and has remarkable safety benefits, environmental social benefits and economic benefits.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, and relates to a treatment device for oily waste gas, and more particularly to a treatment device for low-volume, high-temperature, high-freezing-point oily waste gas generated in chemical production processes. Background Technology

[0002] In industries such as petrochemicals, organic chemicals, and rubber production, large amounts of high-temperature, high-freezing-point organic oil and gas are generated in reaction vessels. To recover valuable components from the oil and gas, most methods directly employ high-temperature steam distillation to separate the high-freezing-point organic compounds. The waste gas is then cooled by spraying and further treated.

[0003] This type of exhaust gas generally has a low volume, typically ranging from 50 to 500 m³. 3 The temperature ranges from 100℃ to 200℃ per hour. Due to the high condensation point of the waste gas, it will condense directly during spray cooling, clogging the spraying and secondary treatment devices, affecting the stability of equipment operation, and easily causing equipment damage. Therefore, conventional treatment methods cannot effectively treat this type of organic waste gas. Furthermore, conventional waste gas treatment equipment such as UV radiation or direct sampling and combustion methods are also not well-suited for this type of waste gas.

[0004] Therefore, it is necessary to develop a convenient and efficient treatment device for low-volume, high-temperature, high-condensation-point oily waste gas. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a treatment device for low-volume, high-temperature, high-freezing-point oily waste gas. It can effectively treat the white oily waste gas in the gas discharged from the reactor, meet the emission standards of the waste gas, and has significant safety, environmental and social benefits and economic benefits.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A treatment device for low-volume, high-temperature, high-freezing-point oily waste gas includes a reaction vessel, a flotation tank, a blower, a water removal device, an activated carbon adsorption device, and an exhaust stack. The device is characterized in that the waste gas outlet of the reaction vessel is connected to the waste gas inlet of the flotation tank, and a flame arrester is provided between the waste gas outlet of the reaction vessel and the waste gas inlet of the flotation tank. The flotation tank is covered with a sealing cover. The waste gas outlet of the flotation tank is connected to the waste gas inlet of the water removal device via the blower. The waste gas outlet of the water removal device is connected to the waste gas inlet of the activated carbon adsorption device. The exhaust gas outlet of the activated carbon adsorption device is connected to the exhaust stack to facilitate the discharge of exhaust gas through the exhaust stack.

[0008] Preferably, a first gate valve is provided between the exhaust gas outlet of the reactor and the flame arrester.

[0009] Preferably, a check valve is provided between the first gate valve and the flame arrester.

[0010] Preferably, a second gate valve is provided between the exhaust gas outlet of the flotation tank and the blower.

[0011] Preferably, a third gate valve is provided at the bottom of the water removal device.

[0012] Preferably, the activated carbon adsorption device is provided with a fourth gate valve at the bottom.

[0013] Preferably, a fifth gate valve is provided at the bottom of the exhaust pipe.

[0014] Compared with the prior art, the treatment device for low-volume, high-temperature, high-freezing-point oily waste gas of this utility model has one or more of the following beneficial technical effects:

[0015] 1. This utility model makes full use of the flotation tank in the original sewage treatment system to treat high-temperature, high-pour-point oil and gas. The small amount of condensed oil recovered from the sewage can be further treated by subsequent sewage treatment devices, thus comprehensively solving the problem of blockage caused when cooling high-temperature, high-pour-point oil and gas.

[0016] 2. This utility model can reduce the process flow. Conventional treatment methods require deep oil removal before cooling the waste gas, while this utility model simplifies the process and can directly carry out cooling and oil removal in the flotation tank.

[0017] 3. The solution provided by this utility model has low cost and simple operation, which significantly reduces the owner's overall operating costs and has significant safety, environmental and social benefits and economic benefits. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the treatment device for low-volume, high-temperature, high-freezing-point oily waste gas of this utility model.

[0019] In the diagram: 1-Reaction vessel, 2-Air flotation tank, 3-Blower, 4-Water removal device, 5-Activated carbon adsorption device, 6-Exhaust stack, 7-First gate valve, 8-Check valve, 9-Flame arrester, 10-Second gate valve, 11-Third gate valve, 12-Fourth gate valve, 13-Fifth gate valve, 14-Sealed cover. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] This utility model relates to a treatment device for low-volume, high-temperature, high-freezing-point oily waste gas. It targets the 110℃ white oily waste gas generated in the reactors of chemical plants. The gas is led through ducts to a flotation tank in a wastewater treatment plant for cooling and oil removal. The flotation tank is then sealed, and the waste gas is transported by a blower to a dewatering device for further treatment. Finally, the waste gas undergoes further treatment using an activated carbon adsorption device before being discharged in compliance with standards. This treatment device effectively treats the white oily waste gas emitted from the reactors, meeting emission standards and demonstrating significant safety, environmental, social, and economic benefits.

[0023] Figure 1 A schematic diagram of the structure of the treatment device for low-volume, high-temperature, high-freezing-point oily waste gas according to this invention is shown. Figure 1 As shown, the treatment device for low-volume, high-temperature, high-freezing-point oily waste gas of this utility model includes a reaction vessel 1, an air flotation tank 2, a blower 3, a water removal device 4, an activated carbon adsorption device 5, and an exhaust stack 6.

[0024] The exhaust gas outlet of the reactor 1 is connected to the exhaust gas inlet of the flotation tank 2, and a flame arrester 9 is installed between the exhaust gas outlet of the reactor 1 and the exhaust gas inlet of the flotation tank 2. A sealing cover 14 is installed on the flotation tank 2. The exhaust gas outlet of the flotation tank 2 is connected to the exhaust gas inlet of the water removal device 4 via the blower 3. The exhaust gas outlet of the water removal device 4 is connected to the exhaust gas inlet of the activated carbon adsorption device 5. The tail gas outlet of the activated carbon adsorption device 5 is connected to the exhaust stack 6 to facilitate the discharge of tail gas through the exhaust stack 6.

[0025] The reactor 1 can be a reactor used in industries such as petrochemicals, organic chemicals, and rubber production. During the production process, the reactor 1 generates high-temperature, high-freezing-point waste gas. The gas inside the reactor 1 is under positive pressure and can be automatically introduced into the wastewater in the flotation tank 2 of the existing wastewater treatment system. That is, the high-temperature, high-freezing-point waste gas enters the wastewater in the flotation tank 2 through the pipeline via the flame arrester 9. The wastewater in the flotation tank 2 cools and removes oil from the waste gas. At the same time, a small amount of waste gas is generated during this process. Therefore, the flotation tank 2 is covered with a sealing cover 14 for sealing. Meanwhile, the blower 3 leads the oil and gas in the sealed space to the dewatering device 4 to remove water vapor from the waste gas. After dewatering, the small amount of organic waste gas in the waste gas is further treated by the activated carbon adsorption device 5, and finally, the purified tail gas is discharged into the atmosphere through the exhaust pipe 6.

[0026] Preferably, a first gate valve 7 is provided between the exhaust gas outlet of the reactor 1 and the flame arrester 9. The first gate valve 7 can be used to control whether the oil and gas in the reactor 1 are transported to the flotation tank 2.

[0027] More preferably, a check valve 8 is provided between the first gate valve 7 and the flame arrester 9. The check valve 8 can prevent oil and gas and exhaust gas from flowing back into the reactor 1.

[0028] Furthermore, preferably, a second gate valve 10 is provided between the exhaust gas outlet of the flotation tank 2 and the blower 3. The second gate valve 10 can control whether the exhaust gas in the flotation tank 2 is delivered to the water removal device 4.

[0029] More preferably, a third gate valve 11 is provided at the bottom of the water removal device 4, which serves as a bottom vent valve for the water removal device 4. More preferably, a fourth gate valve 12 is provided at the bottom of the activated carbon adsorption device 5, which also serves as a bottom vent valve for the activated carbon adsorption device 5. Even more preferably, a fifth gate valve 13 is provided at the bottom of the exhaust stack 6, which serves as a bottom vent valve for the exhaust stack 6. The third gate valve 11, fourth gate valve 12, and fifth gate valve 13 are normally open during normal operation of the treatment device to discharge accumulated wastewater from each piece of equipment, collect the wastewater at a designated location, and prevent water accumulation in the equipment, which could affect its operation.

[0030] The above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is impossible to exhaustively list all possible implementations here. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A treatment device for low-volume, high-temperature, high-freezing-point oily waste gas, comprising a reaction vessel (1), a flotation tank (2), a blower (3), a water removal device (4), an activated carbon adsorption device (5), and an exhaust stack (6), characterized in that, The exhaust gas outlet of the reactor (1) is connected to the exhaust gas inlet of the flotation tank (2), and a flame arrester (9) is provided between the exhaust gas outlet of the reactor (1) and the exhaust gas inlet of the flotation tank (2). The flotation tank (2) is covered with a sealing cover (14). The exhaust gas outlet of the flotation tank (2) is connected to the exhaust gas inlet of the water removal device (4) through the blower (3). The exhaust gas outlet of the water removal device (4) is connected to the exhaust gas inlet of the activated carbon adsorption device (5). The tail gas outlet of the activated carbon adsorption device (5) is connected to the exhaust stack (6) so that the tail gas can be discharged through the exhaust stack (6).

2. The treatment device for low-volume, high-temperature, high-freezing-point oily waste gas according to claim 1, characterized in that, A first gate valve (7) is provided between the exhaust gas outlet of the reactor (1) and the flame arrester (9).

3. The treatment device for low-volume, high-temperature, high-freezing-point oily waste gas according to claim 2, characterized in that, A check valve (8) is provided between the first gate valve (7) and the flame arrester (9).

4. The treatment device for low-volume, high-temperature, high-freezing-point oily waste gas according to claim 3, characterized in that, A second gate valve (10) is provided between the exhaust gas outlet of the flotation tank (2) and the blower (3).

5. The treatment device for low-volume, high-temperature, high-freezing-point oily waste gas according to claim 4, characterized in that, The bottom of the water removal device (4) is provided with a third gate valve (11).

6. The treatment device for low-volume, high-temperature, high-freezing-point oily waste gas according to claim 5, characterized in that, The activated carbon adsorption device (5) is equipped with a fourth gate valve (12) at the bottom.

7. The treatment device for low-volume, high-temperature, high-freezing-point oily waste gas according to claim 6, characterized in that, The bottom of the exhaust pipe (6) is provided with a fifth gate valve (13).

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