Alkylate oil dechlorination device

Abstract

The alkylate oil dechlorination device comprises a first dechlorination tank, a second dechlorination tank, a heat exchanger, a condensation tank and a heater, the lower portion of the first dechlorination tank is connected with a first storage tank, the upper portion of the first dechlorination tank is connected with the lower portion of the second dechlorination tank through a pipeline, and the upper portion of the second dechlorination tank is connected with a second storage tank; the upper portion of the first dechlorination tank and the upper portion of the second dechlorination tank are connected in parallel and then connected with a first inlet of the heat exchanger, a first outlet of the heat exchanger is connected with the lower portion of the condensation tank, and the upper portion of the condensation tank is connected with a second inlet of the heat exchanger. After nitrogen is heated by the heater, the dechlorinating agent in the first dechlorinating tank and the second dechlorinating tank is purged to regenerate the dechlorinating agent, the nitrogen after blowing the dechlorinating agent is introduced into the condensing tank, and the flowing nitrogen is cooled by the cooling fins, so that the dechlorinating agent in the first dechlorinating tank and the second dechlorinating tank is regenerated. Organic chlorine in the nitrogen is condensed and gathered on the cooling fins and then drips to the lower part of the condensation tank to be collected, so that the emission of the organic chlorine is reduced, and the environment is protected.

Description

Technical Field

[0001] This application relates to the technical field of petrochemical engineering, and particularly relates to an alkylate oil dechlorination device. Background Art

[0002] Alkylate oil is a common high-octane gasoline blending component, which has the characteristics of high octane number, good anti-knock performance, low vapor pressure, low sulfur content, and no olefins and aromatics. It is an ideal clean gasoline blending component. There are some harmful impurities in the production process of alkylate oil. Among them, organic chlorides are likely to cause corrosion to pipeline equipment and affect the service life of the equipment. Therefore, it is necessary to carry out dechlorination treatment on alkylate oil during the production process. For example, Chinese Patent with application number 202122242782.8 discloses an alkylate oil dechlorination device, including a dechlorination tower filled with six layers of dechlorination agents. The alkylate oil passes through the adsorbent bed layer from bottom to top and is dechlorinated after being adsorbed by the dechlorination agent. After the existing dechlorination agent is used for a period of time, the dechlorination efficiency will decrease. It is necessary to use hot nitrogen to purge the dechlorination agent to regenerate the dechlorination agent. The purged nitrogen is directly cooled and emptied. When purging, the organic chlorine adsorbed in the dechlorination agent will evaporate into the nitrogen and be directly discharged into the air, polluting the surrounding air. Therefore, an alkylate oil dechlorination device is needed, which can condense the organic chlorine in the nitrogen by cooling and reduce the emission of organic chlorine. Summary of the Utility Model

[0003] In order to solve the above problems, this application proposes an alkylate oil dechlorination device, which can condense the organic chlorine in the nitrogen by cooling and reduce the emission of organic chlorine.

[0004] This application is achieved through the following technical solutions:

[0005] This application proposes an alkylate oil dechlorination device, including: a first dechlorination tank, a second dechlorination tank, a heat exchanger, a condensation tank, and a heater. The lower part of the first dechlorination tank is connected to a first storage tank, the upper part of the first dechlorination tank is connected to the lower part of the second dechlorination tank through a pipeline, and the upper part of the second dechlorination tank is connected to a second storage tank; the upper parts of the first dechlorination tank and the second dechlorination tank are connected in parallel and then connected to the first inlet of the heat exchanger. The first outlet of the heat exchanger is connected to the lower part of the condensation tank. The upper part of the condensation tank is connected to the second inlet of the heat exchanger. The second outlet of the heat exchanger is connected to the inlet of the heater. The outlet of the heater is connected in parallel to the lower parts of the first dechlorination tank and the second dechlorination tank through a blower.

[0006] Further, a plurality of cooling fins are installed in the condensation tank in a staggered manner. The cooling fins horizontally penetrate the condensation tank, and the upper part of the cooling fins is hollow. The ends of the cooling fins are connected in parallel with each other.

[0007] Further, after the ends of the cooling fins are connected in parallel, they are connected to a refrigerant water tank through a circulation pump.

[0008] Further, an air outlet head is provided at the lower part of the condensation tank, and the air outlet head is connected to the first outlet of the heat exchanger. A discharge pipe is also provided at the lower part of the condensation tank.

[0009] Further, a nitrogen tank is also included, and the nitrogen tank is connected to the inlet of the heater.

[0010] Further, an evacuation valve is provided on the pipeline at the upper part of the condensation tank.

[0011] Advantages of this application: After heating nitrogen by the heater, the dechlorination agent in the first dechlorination tank and the second dechlorination tank is purged to regenerate the dechlorination agent. The nitrogen after purging the dechlorination agent is introduced into the condensation tank, and the cooling fins are used to cool down the flowing nitrogen, so that the organic chlorine in the nitrogen condenses and agglomerates on the cooling fins and then drips to the lower part of the condensation tank for collection, thereby reducing the emission of organic chlorine and protecting the environment. Description of the Drawings

[0012] Figure 1 Structural schematic of the present utility model Figure Two

[0013] Figure 2 Structural schematic of the condensation tank of the present utility model Figure Two

[0014] Figure 3 Flow direction schematic during dechlorination of the present utility model Figure Two

[0015] Figure 4 Flow direction schematic during regeneration of the present utility model Figure Two

[0016] In the figure: 1 - First dechlorination tank, 2 - Second dechlorination tank, 3 - Heat exchanger, 4 - Condensation tank, 5 - Heater, 6 - Exhaust fan, 7 - Cooling fins, 8 - Refrigerant water tank, 9 - Air outlet head, 10 - Discharge pipe, 11 - Nitrogen tank, 12 - Evacuation valve. Detailed Embodiments

[0017] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0018] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will change accordingly.

[0019] In addition, the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0020] As Figures 1 to 4 shown, an embodiment of the present utility model provides an alkylated oil dechlorination device, including: a first dechlorination tank 1, a second dechlorination tank 2, a heat exchanger 3, a condensation tank 4, a heater 5. The lower part of the first dechlorination tank 1 is connected to a first storage tank, the upper part of the first dechlorination tank 1 is connected to the lower part of the second dechlorination tank 2 through a pipeline, and the upper part of the second dechlorination tank 2 is connected to a second storage tank; the upper parts of the first dechlorination tank 1 and the second dechlorination tank 2 are connected in parallel and then connected to the first inlet of the heat exchanger 3. The first outlet of the heat exchanger 3 is connected to the lower part of the condensation tank 4. The upper part of the condensation tank 4 is connected to the second inlet of the heat exchanger 3. The second outlet of the heat exchanger 3 is connected to the inlet of the heater 5. The outlet of the heater 5 is connected in parallel to the lower parts of the first dechlorination tank 1 and the second dechlorination tank 2 through a blower 6.

[0021] As Figure 3 shown, when the first dechlorination tank 1 and the second dechlorination tank 2 are dechlorinating, they are connected in series. The alkylated oil enters the first dechlorination tank 1 from the lower part of the first dechlorination tank 1. After flowing through the dechlorination agent filler in the first dechlorination tank 1, it then flows into the lower part of the second dechlorination tank 2 through the upper part of the first dechlorination tank 1 and enters the second dechlorination tank 2, and then flows out from the upper part of the second dechlorination tank 2 and is sent to the second storage tank for storage. The organic chlorine components in the alkylated oil are absorbed by the dechlorination agent filler to achieve the purpose of dechlorination. After being used for a period of time, when the organic chlorine absorbed by the dechlorination agent filler reaches a certain amount, the absorption efficiency decreases. At this time, the dechlorination agent filler needs to be regenerated.

[0022] As Figure 4As shown, during regeneration, the opening and closing of the valve is first adjusted so that the lower part of the first dechlorination tank 1 and the lower part of the second dechlorination tank 2 are connected in parallel and then connected to the exhaust fan 6, the upper part of the first dechlorination tank 1 and the upper part of the second dechlorination tank 2 are connected in parallel and then connected to the first inlet of the heat exchanger 3, nitrogen is first introduced through the nitrogen tank 11, and after being electrically heated by the heater 5, the hot nitrogen is sent into the first dechlorination tank 1 and the second dechlorination tank 2 through the exhaust fan 6, and the dechlorination agent fillers in the first dechlorination tank 1 and the second dechlorination tank 2 are purged by the hot nitrogen, so that the organic chlorine absorbed by the dechlorination agent volatilizes into the nitrogen, so as to achieve the purpose of regenerating the dechlorination agent, and the volatilized organic chlorine is discharged from the first dechlorination tank 1 and the second dechlorination tank 2 along with the hot nitrogen, and then enters the condensation tank through the heat exchanger 3 4, there are multiple cooling fins 7 in the condenser 4. When the hot nitrogen flows between the cooling fins 7, it is cooled after contacting with the cooling fins 7. After cooling, the organic chlorine condenses and gathers on the cooling fins 7, and then refluxes and drips to the bottom of the condenser 4 and is discharged through the discharge pipe 10. After the nitrogen passes through the condenser 4 and is cooled, it is discharged from the upper part of the condenser 4 and enters the heat exchanger 3 again. After heat exchange with the hot nitrogen, the temperature of the nitrogen is increased, and it enters the heater 5 again for heating, and then it is sent to the first dechlorination tank 1 and the second dechlorination tank 2 again. Through continuous purging, the dechlorination agent fillers in the first dechlorination tank 1 and the second dechlorination tank 2 are regenerated. After the regeneration is completed, the drain valve 12 is opened to discharge the nitrogen into the atmosphere, so that the air pressure in the first dechlorination tank 1 and the second dechlorination tank 2 is balanced with the outside.

[0023] In a specific embodiment, Figure 2 As shown, a plurality of cooling fins 7 are staggeredly installed inside the condenser tank 4. The cooling fins 7 horizontally penetrate the condenser tank 4, and the upper part of the cooling fins 7 is hollow. The ends of the cooling fins 7 are connected in parallel. Chilled water can be passed into the middle of the cooling fins 7, so that the temperature of the cooling fins 7 is reduced to 0°C to 3°C, thereby cooling the nitrogen flowing through, so that the organic chlorine in the nitrogen is condensed and aggregated. The cooling fins 7 are arc-shaped, which can increase the contact area with the nitrogen and improve the cooling efficiency. At the same time, in order to increase the condensation point of the organic chlorine in the nitrogen, an air compressor is provided at the inlet end of the condenser tank 4, and a pressure regulating valve is provided at the outlet end of the condenser tank 4. After increasing the pressure in the condenser tank 4, the condensation point of the organic chlorine in the nitrogen is also increased, so that the organic chlorine in the nitrogen can be quickly condensed and separated.

[0024] Specifically, the ends of the cooling fins 7 are connected in parallel and connected to the refrigerant water tank 8 through a circulation pump, and the chilled water in the refrigerant water tank 8 is sent to the cooling fins 7 through the water pump, so that the temperature of the cooling fins 7 is reduced, thereby reducing the temperature of the nitrogen and condensing the organic chlorine.

[0025] Specifically, Figure 2As shown, an air outlet head 9 is provided at the lower part of the condensation tank 4. The air outlet head 9 is connected to the first outlet of the heat exchanger 3. A discharge pipe 10 is also provided at the lower part of the condensation tank 4. After the hot nitrogen enters the condensation tank 4, it is dispersed through the air outlet head 9, so that the nitrogen is evenly distributed at the lower part of the condensation tank 4 and then flows upward. The discharge pipe 10 can discharge the organochlorine accumulated at the bottom of the condensation tank 4, facilitating the harmless treatment of the organochlorine.

[0026] In a preferred embodiment, a nitrogen tank 11 is further included. The nitrogen tank 11 is connected to the inlet of the heater 5, and nitrogen is provided by the nitrogen tank 11 for the regeneration of the dechlorination agent.

[0027] Preferably, an air vent valve 12 is provided on the pipeline at the upper part of the condensation tank 4. After the regeneration is completed, the air vent valve 12 is opened to discharge the nitrogen into the atmosphere, so that the air pressure in the first dechlorination tank 1 and the second dechlorination tank 2 is balanced with the outside.

[0028] Of course, the present application can also have many other implementation manners. Based on this implementation manner, other implementation manners obtained by those of ordinary skill in the art without any creative work belong to the scope protected by the present application.

Claims

1. An alkylate dechlorination device, characterized in that: include: A first dechlorination tank (1), a second dechlorination tank (2), a heat exchanger (3), a condensation tank (4), and a heater (5); the lower part of the first dechlorination tank (1) is connected to the first storage tank, the upper part of the first dechlorination tank (1) is connected to the lower part of the second dechlorination tank (2) through a pipeline, and the upper part of the second dechlorination tank (2) is connected to the second storage tank; the upper part of the first dechlorination tank (1) and the upper part of the second dechlorination tank (2) are connected in parallel and then connected to the first inlet of the heat exchanger (3); the first outlet of the heat exchanger (3) is connected to the lower part of the condensation tank (4); the upper part of the condensation tank (4) is connected to the second inlet of the heat exchanger (3); the second outlet of the heat exchanger (3) is connected to the inlet of the heater (5); and the outlet of the heater (5) is connected in parallel to the lower part of the first dechlorination tank (1) and the lower part of the second dechlorination tank (2) through an exhaust fan (6).

2. The alkylate dechlorination device according to claim 1, characterized in that: A plurality of cooling fins (7) are staggeredly installed inside the condensation tank (4), the cooling fins (7) horizontally penetrate the condensation tank (4), the upper portion of the cooling fins (7) is hollow, and the ends of the cooling fins (7) are connected in parallel with each other.

3. The alkylate dechlorination device according to claim 2, characterized in that: The ends of the cooling fins (7) are connected in parallel and then connected to a refrigerant water tank (8) via a circulating pump.

4. The alkylate dechlorination device according to claim 2, characterized in that: The lower part of the condensation tank (4) is provided with a gas outlet head (9), which is connected to the first outlet of the heat exchanger (3). The lower part of the condensation tank (4) is also provided with a discharge pipe (10).

5. The alkylate dechlorination device according to claim 1, characterized in that: It also includes a nitrogen tank (11), which is connected to the inlet of the heater (5).

6. The alkylate dechlorination device according to claim 1, characterized in that: A drain valve (12) is provided on the pipeline at the upper part of the condensation tank (4).

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