CN211462629U - High-efficient processing system who administers oil refining sewage VOCs - Google Patents

Abstract

The utility model discloses a high-efficient processing system who administers oil refining sewage VOCs, including the tubulation condenser, vapour and liquid separator, oil water separator, the spray column, catalytic cracking unit and GAC active carbon adsorption jar, the top of spray column and the import clearance conveyer pipe intercommunication connection of condensing engine, simultaneously through another section conveyer pipe intercommunication connection between the export of condensing engine and the import of main air fan, the export of main air fan is passed through conveyer pipe intercommunication with lower extreme one side of GAC active carbon adsorption jar and is connected, one side intercommunication connection of bottom and tubulation condenser of GAC active carbon adsorption jar, one side intercommunication connection of opposite side through another section conveyer pipe and vapour and liquid separator upper end of tubulation condenser. The utility model discloses a be provided with a series of structures and make this device in the use, greatly reduced manufacturing cost, improved VOCs treatment effect, guarantee simultaneously that whole VOCs treatment process does not produce any secondary pollutant.

Description

A treatment system for efficient treatment of VOCs in oil refining wastewater

technical field

The utility model relates to the technical field of waste gas treatment systems for oil refining sewage, in particular to a treatment system for efficiently treating VOCs in oil refining sewage.

Background technique

In the existing industrial production, a large amount of VOCs will be generated. After the VOCs are discharged, the VOCs will be treated by the activated carbon adsorption method to meet the emission standards. At present, the activated carbon adsorption method to treat VOCs requires the addition of sodium hypochlorite solution and hydrogen peroxide. The waste gas is pretreated by means of sodium solution, which greatly increases the production cost. In addition, the activated carbon needs to be treated as a hazardous waste after being saturated by adsorption, and the waste oil generated during the conventional regeneration of the activated carbon should also be disposed of as a hazardous waste. Secondary pollution is caused, so it is necessary to improve the existing technology to solve the above problems.

Utility model content

(1) Technical problems solved

The purpose of this utility model is to provide a treatment system for efficiently treating VOCs in oil refining sewage, in order to solve the need to add sodium hypochlorite solution and sodium hydroxide solution to the existing activated carbon adsorption method proposed in the background technology to treat VOCs. The treatment greatly increases the production cost and the problem of secondary pollution caused by the existing activated carbon adsorption method for VOCs treatment.

(2) Technical solutions

In order to achieve the above purpose, the utility model provides the following technical solutions: a treatment system for efficiently treating VOCs in oil refining sewage, including a tube condenser, a gas-liquid separator, an oil-water separator, a spray tower, a catalytic cracking device and a GAC activated carbon adsorption Tank, the top of the spray tower is connected with the inlet customs clearance conveying pipe of the condenser, while the outlet of the condenser and the inlet of the main fan are connected by another section of conveying pipe, and the outlet of the main fan is connected with GAC activated carbon adsorption One side of the lower end of the tank is communicated and connected through a conveying pipe, the bottom of the GAC activated carbon adsorption tank is connected with one side of the tube condenser, and the other side of the tube condenser is connected to the gas-liquid separator through another section of conveying pipe. One side of the upper end is communicated and connected, while the other side of the upper end of the gas-liquid separator is communicated and connected with the conveying pipe between the spray tower and the condenser through the conveying pipe, and the bottom of the gas-liquid separator is connected with the top of the oil-water separator. are connected through a conveying pipe.

Preferably, the bottom of the spray tower and the top of the industrial circulating cooling water tank are connected through a conveying pipe, and a water outlet pipe is connected to the conveying pipe between the spray tower and the industrial circulating cooling water tank. A first solenoid valve is installed on it.

Preferably, a spray head is arranged at the upper end of the spray tower, and a filter layer is arranged at the lower end of the spray tower. The spray head is fixedly connected to the inner wall of the spray tower through a mounting plate. An air inlet pipe is communicated and connected to the spray tower at the position between the shower head and the filter layer.

Preferably, the sprinkler head and the outlet of the circulating water pump are communicated and connected through a conveying pipe, while the inlet of the circulating water pump and the bottom of the industrial circulating cooling water tank are communicated and connected through another conveying pipe, and the circulating water pump is fixedly installed in the industrial circulation On the top surface of the cooling water tank, a water injection pipe is communicated and connected to one side of the top of the industrial circulating cooling water tank.

Preferably, a GAC activated carbon layer is fixedly installed inside the GAC activated carbon adsorption tank, a high-altitude discharge pipe is connected to the top of the GAC activated carbon adsorption tank, and a second solenoid valve is installed on the high-altitude discharge pipe, and the GAC activated carbon adsorbs A steam pipe is communicated and connected to one side of the upper end of the tank, and a third solenoid valve is installed on the steam pipe.

Preferably, a serpentine-shaped condenser tube is installed inside the tube-and-tube condenser, and both ends of the serpentine-shaped condenser tube are respectively communicated and connected with the conveying pipes on both sides of the tube-and-tube condenser.

Preferably, the bottom side of the oil-water separator is connected to the top of the water storage tank through a conveying pipe, and the other side of the bottom of the oil-water separator is connected to the upper end side of the catalytic cracking unit through another conveying pipe, so An oil pump is installed on the conveying pipe between the oil-water separator and the catalytic cracking device.

(3) Beneficial effects

Compared with the prior art, the beneficial effects of the present utility model are:

(1) The utility model is provided with a spray tower, a spray head and an industrial circulating cooling water tank. During use, cooling water is added to the industrial circulating cooling water tank through a water injection pipe, and an exhaust gas collection system is connected to the air inlet pipe. The exhaust gas enters the spray tower, and the circulating water pump is controlled to work at this time. Under the action of the circulating water pump, the cooling water in the industrial circulating cooling water tank is transported through the conveying pipe, and finally sprayed from the spray head to eliminate the odor and the odor in the exhaust gas. The acid gas is washed with water to discharge the odor and acid gas in the exhaust gas. The cooling water sprayed by the spray head is filtered by the filter layer and finally flows back to the industrial circulating cooling water tank from the conveying pipe at the bottom of the spray tower. In this setting, the sodium hypochlorite solution and sodium hydroxide solution are replaced by cooling water, which greatly reduces the production cost and solves the problem that the existing activated carbon adsorption method needs to add sodium hypochlorite solution and sodium hydroxide solution to the waste gas. deal with the problem, which greatly increases the production cost.

(2) the utility model is provided with GAC activated carbon adsorption tank, steam pipe and the third solenoid valve, in use, the steam pipe is connected to a steam furnace, and after the GAC activated carbon layer in the GAC activated carbon adsorption tank is saturated, the staff controls the third solenoid valve Open, the steam will be transported into the GAC activated carbon adsorption tank through the steam pipe, and the GAC activated carbon layer will regain its activity after desorption, which is convenient for repeated use. The steam and VOCs mixture generated after the desorption of the GAC activated carbon layer are cooled by the serpentine condenser tube After entering the gas-liquid separator, the uncooled VOCs gas re-enters the suction port of the condenser and re-enters the GAC activated carbon adsorption tank to be adsorbed. After the oil-water mixture condensed into liquid is completely separated in the oil-water separator, the water enters the water storage. In the tank, the oil is transported to the catalytic cracking unit by the oil pump as a raw material for back refining. This setting does not produce any secondary pollutants during the entire VOCs treatment process, which solves the need for activated carbon to be used as hazardous waste after adsorption saturation. The waste oil generated during the conventional regeneration of activated carbon should also be disposed of in a hazardous waste manner, causing the problem of secondary pollution.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present utility model;

Fig. 2 is the sectional view of the utility model;

Fig. 3 is the enlarged view of place A in Fig. 1 of the utility model;

FIG. 4 is an enlarged view of the position B in FIG. 2 of the present utility model.

The reference signs in the figure are: 1, tube condenser; 2, conveying pipe; 3, gas-liquid separator; 4, oil-water separator; 5, water storage tank; 6, spray tower; 7, air inlet pipe; 8 , industrial circulating cooling water tank; 9, catalytic cracking unit; 10, oil pump; 11, condenser; 12, main fan; 13, third solenoid valve; 14, steam pipe; 15, second solenoid valve; 16, high-altitude discharge pipe ; 17, GAC activated carbon adsorption tank; 18, serpentine condenser; 19, GAC activated carbon layer; 20, water outlet pipe; 21, the first solenoid valve; 22, water injection pipe; 23, circulating water pump; 24, mounting plate; 25, Sprinkler; 26. Filter layer.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Figures 1-4, an embodiment provided by the present utility model: a treatment system for efficiently treating VOCs in oil refining sewage, including a tube condenser 1, a gas-liquid separator 3, an oil-water separator 4, and a spray tower 6 , catalytic cracking device 9 and GAC activated carbon adsorption tank 17, the top of the spray tower 6 and the inlet customs clearance conveying pipe 2 of the condenser 11 are communicated and connected, and the setting of the spray tower 6 is used to wash the odor and acid gas, and the condenser The setting of 11 is used to cool the exhaust gas, and at the same time, the outlet of the condenser 11 and the inlet of the main fan 12 are connected through another section of the conveying pipe 2. The setting of the main fan 12 can generate a large suction force, thereby sucking the exhaust gas into the GAC. In the activated carbon adsorption tank 17, the outlet of the main fan 12 is communicated with the lower end side of the GAC activated carbon adsorption tank 17 through the conveying pipe 2. The GAC activated carbon adsorption tank 17 is arranged to adsorb the exhaust gas, and the bottom of the GAC activated carbon adsorption tank 17 is connected to the column. One side of the tube condenser 1 is connected in communication. The tube condenser 1 is provided for cooling and liquefaction of the mixture of steam and VOCs. The other side of the tube condenser 1 is connected to the upper end of the gas-liquid separator 3 through another section of conveying pipe 2 One side is connected and connected, the setting of the gas-liquid separator 3 can separate the unliquefied part and the liquefied part of the VOCs mixture, and the other side of the upper end of the gas-liquid separator 3 passes through the conveying pipe 2 and the spray tower 6. It is connected to the conveying pipe 2 between the condenser 11. This setting can facilitate the return of the unliquefied part of the VOCs mixture to the GAC activated carbon adsorption tank 17 for re-liquefaction. The bottom of the gas-liquid separator 3 and the top of the oil-water separator 4 They are communicated and connected through the conveying pipe 2, and this arrangement facilitates the flow of the liquefied water vapor and VOCs mixture into the oil-water separator 4, which is used for the separation of oil and water.

Further, the bottom of the spray tower 6 and the top of the industrial circulating cooling water tank 8 are communicated and connected through the conveying pipe 2, which facilitates the cooling water after washing to flow back into the industrial circulating cooling water tank 8, and the spray tower 6 and the industrial circulating cooling water tank 8 are connected. A water outlet pipe 20 is connected to the conveying pipe 2 between the circulating cooling water tanks 8, and a first solenoid valve 21 is installed on the water outlet pipe 20. The water outlet pipe 20 is arranged to facilitate the discharge of cooling water.

Further, a spray head 25 is arranged at the upper end of the spray tower 6, and a filter layer 26 is arranged at the lower end of the spray tower 6 at the same time. The filter layer 26 includes a sandstone layer, a zeolite layer and an activated carbon layer. The industrial cooling water is filtered to remove impurities, the spray head 25 is fixedly connected to the inner wall of the spray tower 6 through the mounting plate 24, and the spray tower 6 at the position between the spray head 25 and the filter layer 26 is connected with an intake pipe 7. , the intake pipe 7 is connected to the exhaust gas collection system.

Further, the spray head 25 and the outlet of the circulating water pump 23 are communicated and connected through the conveying pipe 2, while the inlet of the circulating water pump 23 is connected with the bottom of the industrial circulating cooling water tank 8 through another section of the conveying pipe 2, which can be set by the circulating water pump. The work of 23 is to realize the cooling water in the industrial circulating cooling water tank 8 is transported to the shower head 25, the circulating water pump 23 is fixedly installed on the top surface of the industrial circulating cooling water tank 8, and the top side of the industrial circulating cooling water tank 8 is connected. There is a water injection pipe 22, and the water injection pipe 22 is provided for adding industrial cooling water.

Further, the GAC activated carbon adsorption tank 17 is fixedly installed with a GAC activated carbon layer 19, and the top of the GAC activated carbon adsorption tank 17 is communicated and connected with a high-altitude discharge pipe 16, and the high-altitude discharge pipe 16 is set for the discharge of the gas that reaches the discharge standard after the gas outlet, A second solenoid valve 15 is installed on the high-altitude discharge pipe 16 , a steam pipe 14 is connected to the upper end of the GAC activated carbon adsorption tank 17 , and a third solenoid valve 13 is installed on the steam pipe 14 , and the steam pipe 14 is connected to a steam furnace.

Further, a serpentine condenser tube 18 is installed inside the tube condenser 1, and the two ends of the serpentine condenser tube 18 are respectively connected to the conveying pipes 2 on both sides of the tube condenser 1. The arrangement of the serpentine condenser tube 18 is used for Cooling of steam and VOCs mixtures.

Further, the bottom side of the oil-water separator 4 is communicated with the top of the water storage tank 5 through the conveying pipe 2, while the other side of the bottom of the oil-water separator 4 is communicated with the upper end side of the catalytic cracking device 9 through another section of the conveying pipe 2. The oil pump 10 is installed on the conveying pipe 2 between the oil-water separator 4 and the catalytic cracking device 9. The catalytic cracking device 9 is provided for refining waste oil, and the water storage tank 5 is provided for water storage.

Working principle: In use, cooling water is added to the industrial circulating cooling water tank 8 through the water injection pipe 22, the exhaust gas collection system is connected to the intake pipe 7, and the exhaust gas enters the spray tower 6 under the transmission of the intake pipe 7, and the circulating water pump 23 is controlled at this time. Work, under the action of the circulating water pump 23, the cooling water in the industrial circulating cooling water tank 8 is transported through the conveying pipe 2, and finally sprayed from the spray head 25 to wash the odor and acid gas in the exhaust gas to discharge the exhaust gas. The odor and acid gas in the water, the cooling water sprayed by the spray head 25 is filtered by the filter layer 26 and finally flows back to the industrial circulating cooling water tank 8 from the conveying pipe 2 at the bottom of the spray tower 6, and the circulating use of cooling water has been achieved. , the cooled VOCs mixture enters the GAC activated carbon adsorption tank 17 through the work of the main fan 12, and is adsorbed by the GAC activated carbon layer 19. When the GAC activated carbon layer 19 in the GAC activated carbon adsorption tank 17 is saturated, the staff controls the third electromagnetic The valve 13 is opened, and the steam will be transported into the GAC activated carbon adsorption tank 17 through the steam pipe 14. The GAC activated carbon layer 19 is reactivated after desorption, which is convenient for repeated use. The steam and VOCs mixture generated after the desorption of the GAC activated carbon layer 19 After cooling through the serpentine condenser tube 18, it enters the gas-liquid separator 3, and the uncooled VOCs gas re-enters the suction port of the condenser 11 and enters the GAC activated carbon adsorption tank 17 to be adsorbed and condensed into a liquid oil-water mixture in the oil-water separator. The oil is completely separated in the medium, the separated water enters the water storage tank 5, and the oil is transported to the catalytic cracking unit 9 through the oil pump 10 for refining as a raw material.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A treatment system for efficiently treating VOCs in oil refining sewage, comprising a tubular condenser (1), a gas-liquid separator (3), an oil-water separator (4), a spray tower (6), and a catalytic cracking device (9) And GAC activated carbon adsorption tank (17), it is characterized in that: the top of described spray tower (6) and the inlet customs clearance conveying pipe (2) of condenser (11) are communicated and connected, and the outlet of condenser (11) is connected with the main The inlet of the fan (12) is communicated and connected through another section of conveying pipe (2), and the outlet of the main fan (12) is communicated and connected with the lower end side of the GAC activated carbon adsorption tank (17) through the conveying pipe (2), so the The bottom of the GAC activated carbon adsorption tank (17) is communicated with one side of the tube condenser (1), and the other side of the tube condenser (1) is connected to the gas-liquid separator through another section of conveying pipe (2). (3) One side of the upper end is connected and connected, while the other side of the upper end of the gas-liquid separator (3) passes through the conveying pipe (2) and the conveying pipe (2) between the spray tower (6) and the condenser (11). In the communication connection, the bottom of the gas-liquid separator (3) and the top of the oil-water separator (4) are communicated and connected through the conveying pipe (2). 2. a kind of high-efficiency treatment system for treating oil refining sewage VOCs according to claim 1, it is characterized in that: between the bottom of described spray tower (6) and the top of industrial circulating cooling water tank (8) by conveying pipe ( 2) Connected and connected, and the conveying pipe (2) between the spray tower (6) and the industrial circulating cooling water tank (8) is connected with a water outlet pipe (20), and a first water outlet pipe (20) is installed on the water outlet pipe (20). Solenoid valve (21). 3. a kind of high-efficiency treatment system for treating oil refining sewage VOCs according to claim 1, is characterized in that: described spray tower (6) interior upper end position is provided with spray head (25), and spray tower (6) simultaneously ) is provided with a filter layer (26) at the lower end of the interior, the spray head (25) is fixedly connected to the inner wall of the spray tower (6) through a mounting plate (24), the spray head (25) and the filter layer An air inlet pipe (7) is communicated and connected to the spray tower (6) at the position between (26). 4. A kind of high-efficiency treatment system for treating oil refining sewage VOCs according to claim 3, characterized in that: the spray head (25) and the outlet of the circulating water pump (23) are communicated and connected through a conveying pipe (2). At the same time, the inlet of the circulating water pump (23) is connected to the bottom of the industrial circulating cooling water tank (8) through another section of conveying pipe (2), and the circulating water pump (23) is fixedly installed on the top surface of the industrial circulating cooling water tank (8). Above, the top side of the industrial circulating cooling water tank (8) is connected with a water injection pipe (22). 5. a kind of high-efficiency treatment system for treating oil refining sewage VOCs according to claim 1, is characterized in that: the inside of described GAC activated carbon adsorption tank (17) is fixedly installed with GAC activated carbon layer (19), and described GAC activated carbon adsorption The top of the tank (17) is connected with a high-altitude discharge pipe (16), and a second solenoid valve (15) is installed on the high-altitude discharge pipe (16), and the upper end side of the GAC activated carbon adsorption tank (17) is connected with a a steam pipe (14), and a third solenoid valve (13) is installed on the steam pipe (14). 6. A kind of high-efficiency treatment system for treating oil refining sewage VOCs according to claim 1, characterized in that: a serpentine condenser tube (18) is installed in the inside of the tubular condenser (1), and the serpentine condenser Both ends of the pipe (18) are respectively communicated and connected with the conveying pipes (2) on both sides of the tube-and-tube condenser (1). 7. a kind of high-efficiency treatment system for treating oil refining sewage VOCs according to claim 1, is characterized in that: the bottom side of described oil-water separator (4) and the top of water storage tank (5) pass through conveying pipe (2) ) is communicated and connected, and at the same time the other side of the bottom of the oil-water separator (4) is connected to the upper end side of the catalytic cracking device (9) through another section of the conveying pipe (2), and the oil-water separator (4) and the catalytic cracking device are connected. An oil pump (10) is installed on the delivery pipe (2) between (9).

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