An oil product mercury removal device

Abstract

This utility model discloses an oil mercury removal device, including a stripping tower. The stripping tower has a mercury-containing oil inlet, a mercury-removed oil outlet, a natural gas inlet, and a mercury-containing natural gas outlet. The mercury-containing natural gas outlet is connected to each mercury removal tower via a corresponding first timing valve. Each mercury removal tower is connected to the natural gas outlet and the inlet of a regulating valve via a corresponding second timing valve. The outlet of the regulating valve is connected to each mercury removal tower via a corresponding third timing valve. Each mercury removal tower is connected to the inlet of a heater via a corresponding fourth timing valve. The outlet of the heater is connected to each mercury removal tower via a corresponding fifth timing valve. Each mercury removal tower is connected to the inlet of a cooler via a corresponding sixth timing valve. The outlet of the cooler is connected to the gas-liquid inlet of a gas-liquid separator. This device can solve the problems of high mercury content and large volume of difficult-to-treat solid waste containing a large amount of flammable and volatile oil produced by conventional oil mercury removal methods, and can reduce poisoning incidents.

Description

Technical Field

[0001] This utility model belongs to the field of oil mercury removal technology in oil and gas stations, and specifically relates to an oil mercury removal device. Background Technology

[0002] During oil and gas extraction, due to geological conditions and storage conditions, the extracted oil and gas may contain mercury. Mercury's harmful effects on the human body primarily involve the central nervous system, digestive system, and kidneys. In addition, mercury also affects the respiratory system, skin, blood, and eyes, and in severe cases can lead to acute pulmonary edema or acute renal failure. Furthermore, mercury readily reacts with aluminum, which is widely used in oil and gas processing systems, especially in cryogenic natural gas equipment. The presence of mercury in oil and gas can cause downstream aluminum-containing equipment to fail, potentially leading to accidents. Therefore, when oil products contain mercury, it is necessary to consider whether to remove the mercury, depending on production needs. The conventional methods for mercury removal from oil products are as follows:

[0003] For mercury removal from light oils such as naphtha and condensate, conventional methods include adsorption using sulfur- or silver-loaded activated carbon or molecular sieves. The problems with this approach are: the activated carbon or molecular sieves cannot be regenerated and need to be replaced periodically. However, the replaced activated carbon or molecular sieves have a high mercury content and contain a large amount of volatile oils, which can easily lead to secondary pollution or fire if not handled properly.

[0004] For mercury removal from heavy oils, the conventional approach is to add sulfur-containing compounds (such as hydrogen sulfide or sodium sulfide) or sulfur-containing flocculants to the oil. These compounds or flocculants react with mercury to form mercuric sulfide, which precipitates out and is then removed by filtration. The problems with this method are: sulfides are inherently toxic and harmful substances, and they readily react with other readily accessible substances such as water and air to produce toxic and harmful compounds. Furthermore, the filtered precipitate contains a large amount of volatile oil and unreacted sulfides, which, if not handled properly, can easily lead to fires or poisoning incidents.

[0005] In summary, conventional methods for removing mercury from oil products generate large quantities of solid waste containing high levels of mercury and volatile oils. This waste is difficult to handle and prone to safety accidents. Operators are exposed to mercury-containing environments for extended periods and may also use toxic or hazardous media or media that readily react with other easily accessible substances to produce toxic or hazardous substances, increasing the risk of poisoning. Utility Model Content

[0006] In view of the above-mentioned defects of the prior art, the present invention provides an oil mercury removal device, which can solve the problem that the adsorption medium cannot be regenerated due to conventional mercury removal methods when processing light oil, and can also solve the problems of high mercury content, large mass and difficulty in handling solid waste containing a large amount of flammable and volatile oil produced by conventional mercury removal methods. Furthermore, when processing heavy oil, it does not require the use of toxic or harmful media or media that easily react with other readily accessible substances to produce toxic or harmful substances.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A mercury removal device for oil products includes a stripping tower. The stripping tower has a mercury-containing oil inlet, a mercury-removed oil outlet, a natural gas inlet, and a mercury-containing natural gas outlet. The mercury-containing natural gas outlet is connected to each mercury removal tower filled with regenerable adsorption packing via corresponding first sequential valves. Each mercury removal tower is connected to the natural gas outlet and the inlet of a regulating valve via corresponding second sequential valves. The outlet of the regulating valve is connected to each mercury removal tower via corresponding third sequential valves. Each mercury removal tower is connected to the inlet of a heater via corresponding fourth sequential valves. The outlet of the heater is connected to each mercury removal tower via corresponding fifth sequential valves. Each mercury removal tower is connected to the inlet of a cooler via corresponding sixth sequential valves. The outlet of the cooler is connected to the gas-liquid inlet of a gas-liquid separator. The liquid outlet of the gas-liquid separator is a mercury-containing liquid outlet.

[0009] One part of the mercury removal tower is in an adsorption state, another part is in a regeneration state, and the rest is in a cold blowing state. The first and second timing valves connected to the mercury removal tower in the adsorption state are open, the third and fourth timing valves connected to the mercury removal tower in the cold blowing state are open, and the fifth and sixth timing valves connected to the mercury removal tower in the regeneration state are open. The remaining first, second, third, fourth, fifth, and sixth timing valves are closed. The mercury removal tower in the adsorption state enters the regeneration state after adsorption for a period of time. The mercury removal tower in the regeneration state enters the cold blowing state after regeneration. The mercury removal tower in the cold blowing state enters the adsorption state after cold blowing.

[0010] Furthermore, the mercury-containing oil inlet is located at the top of the stripping tower, the mercury-free oil outlet is located at the bottom of the stripping tower, the natural gas inlet is located at the bottom of the stripping tower, and the mercury-containing natural gas outlet is located at the top of the stripping tower.

[0011] Furthermore, each of the second, third, and fifth timing valves is connected to the bottom of the corresponding mercury removal tower, and each of the first, fourth, and sixth timing valves is connected to the top of the corresponding mercury removal tower.

[0012] Furthermore, the bottom of each of the mercury removal towers is connected to the inlet of the natural gas outlet filter via a corresponding second timing valve. The outlet of the natural gas outlet filter is connected to both the natural gas outlet and the inlet of the regulating valve. The natural gas passing through the regulating valve is called regenerated gas.

[0013] Furthermore, the top of each of the mercury removal towers is connected to the inlet of the regeneration gas filter via a corresponding sixth timing valve, and the outlet of the regeneration gas filter is connected to the inlet of the cooler.

[0014] Furthermore, the mercury-containing natural gas outlet is connected to the upstream end of each first sequential valve via a mercury-containing natural gas pipeline, and the downstream end of each first sequential valve is connected to the top of the corresponding mercury removal tower. The gas outlet of the gas-liquid separator is connected to the mercury-containing natural gas pipeline via a supplementary natural gas pipeline, and a compressor is provided on the supplementary natural gas pipeline.

[0015] Furthermore, the gas-liquid inlet is located at the top of the gas-liquid separator, the mercury-containing liquid outlet is located at the bottom of the gas-liquid separator, and the gas outlet is located at the top of the gas-liquid separator.

[0016] Furthermore, there are three mercury removal towers, one of which is in an adsorption state, the second of which is in a regeneration state, and the third of which is in a cold blowing state.

[0017] Furthermore, the regenerable adsorption packing material is a silver-loaded molecular sieve.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The oil mercury removal device of this utility model includes a stripping tower, which is provided with a mercury-containing oil inlet, a mercury-removed oil outlet, a natural gas inlet, and a mercury-containing natural gas outlet. The mercury-containing natural gas outlet is connected to each mercury removal tower filled with regenerable adsorption packing through corresponding first sequential valves. Each mercury removal tower is connected to the natural gas outlet and the inlet of a regulating valve through corresponding second sequential valves. The outlet of the regulating valve is connected to each mercury removal tower through corresponding third sequential valves. Each mercury removal tower is connected to the inlet of a heater through corresponding fourth sequential valves. The outlet of the heater is connected to each mercury removal tower through corresponding fifth sequential valves. Each mercury removal tower is connected to the inlet of a cooler through corresponding sixth sequential valves. The outlet of the cooler is connected to the gas-liquid inlet of a gas-liquid separator. The liquid outlet of the gas-liquid separator is a mercury-containing liquid outlet. This invention utilizes the natural gas from the oil and gas plant itself within a gas stripping tower to remove mercury from mercury-containing oil products. Simultaneously, a regenerable adsorption packing material in a mercury removal tower, employing both room-temperature mercury adsorption and high-temperature mercury desorption, removes the mercury entrained in the natural gas. The regenerable adsorption packing material in the mercury removal tower does not directly contact the mercury-containing oil products. Furthermore, natural gas has a smaller molecular weight and fewer impurities compared to oil products, resulting in high adsorption efficiency and a long lifespan for the regenerable adsorption packing material. This significantly reduces the amount of difficult-to-treat solid waste containing high mercury content and a large amount of flammable and volatile oils compared to conventional methods. This solves the problem in the prior art where conventional mercury removal methods for light oils result in the adsorption medium being unable to regenerate due to direct contact with the mercury-containing oil products. It also addresses the problem in the prior art where conventional mercury removal methods for oil products produce large quantities of difficult-to-treat solid waste containing high mercury content and a large amount of flammable and volatile oils. The solid waste includes the replaced adsorption medium or filtered sediment. The adsorption medium is activated carbon or molecular sieve. In this invention, a large amount of mercury is periodically discharged through the mercury-containing liquid outlet of the gas-liquid separator and transported externally in a closed manner, thus avoiding contact with operators. Furthermore, since the regenerable adsorption packing in the mercury removal tower does not directly contact the mercury-containing oil, it is unaffected by the weight of the oil or the amount of impurities. When processing heavy oil, there is no need to use toxic or harmful media or media that easily react with other readily contacting substances to produce toxic or harmful substances, which can reduce the possibility of poisoning incidents. In addition, the frequency and duration of direct contact between operators and mercury-containing oil and solid waste are much lower than conventional practices. Moreover, if the mercury content in the natural gas in the oil and gas station does not meet the national standard, the mercury removal device of this invention can also remove the mercury carried in the natural gas. The mercury-carrying natural gas can enter the gas stripping tower through the natural gas inlet and be discharged from the mercury-containing natural gas outlet into the corresponding mercury removal tower. Attached Figure Description

[0020] Figure 1 This is a flowchart of the mercury removal device for oil products in this utility model.

[0021] The following are the labeling instructions in the diagram: 1. Gas stripping tower; 101. Mercury-containing oil inlet; 102. Mercury-removed oil outlet; 103. Natural gas inlet; 104. Mercury-containing natural gas outlet; 2. First timing valve; 3. Mercury removal tower; 4. Second timing valve; 5. Natural gas outlet; 6. Regulating valve; 7. Third timing valve; 8. Fourth timing valve; 9. Heater; 10. Fifth timing valve; 11. Sixth timing valve; 12. Cooler; 13. Gas-liquid separator; 1301. Gas-liquid inlet; 1302. Mercury-containing liquid outlet; 1303. Gas outlet; 14. Natural gas outlet filter; 15. Regenerated gas filter; 16. Mercury-containing natural gas pipeline; 17. Supplementary natural gas pipeline; 18. Compressor. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0023] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figure 1As shown, an oil mercury removal device includes a stripping tower 1. The stripping tower 1 is provided with a mercury-containing oil inlet 101, a mercury-removed oil outlet 102, a natural gas inlet 103, and a mercury-containing natural gas outlet 104. The mercury-containing natural gas outlet 104 is connected to each mercury removal tower 3 filled with regenerable adsorption packing through corresponding first timing valves 2. Each mercury removal tower 3 is connected to the natural gas outlet 5 and the inlet of the regulating valve 6 through corresponding second timing valves 4. The outlet of the regulating valve 6 is connected to each mercury removal tower 3 through corresponding third timing valves 7. Each mercury removal tower 3 is connected to the inlet of the heater 9 through corresponding fourth timing valves 8. The outlet of the heater 9 is connected to each mercury removal tower 3 through corresponding fifth timing valves 10. Each mercury removal tower 3 is connected to the inlet of the cooler 12 through corresponding sixth timing valves 11. The outlet of the cooler 12 is connected to the gas-liquid inlet 1301 of the gas-liquid separator 13. The liquid outlet of the gas-liquid separator 13 is a mercury-containing liquid outlet 1302.

[0026] One part of the mercury removal tower 3 is in the adsorption state, another part is in the regeneration state, and the rest is in the cold blowing state. The first timing valve 2 and the second timing valve 4 connected to the mercury removal tower 3 in the adsorption state are open. The third timing valve 7 and the fourth timing valve 8 connected to the mercury removal tower 3 in the cold blowing state are open. The fifth timing valve 10 and the sixth timing valve 11 connected to the mercury removal tower 3 in the regeneration state are open. The remaining first timing valve 2, second timing valve 4, third timing valve 7, fourth timing valve 8, fifth timing valve 10, and sixth timing valve 11 are closed. The mercury removal tower 3 in the adsorption state enters the regeneration state after adsorption for a period of time. The mercury removal tower 3 in the regeneration state enters the cold blowing state after regeneration. The mercury removal tower 3 in the cold blowing state enters the adsorption state after cold blowing.

[0027] When mercury removal from oil products is required, mercury-containing oil enters the stripping tower 1 through the mercury-containing oil inlet 101, and natural gas enters the stripping tower 1 through the natural gas inlet 103. Within the stripping tower 1, the natural gas carries the mercury from the mercury-containing oil out through the mercury-containing natural gas outlet 104. This mercury-carrying natural gas is called mercury-containing natural gas. The mercury-removed oil is discharged from the mercury-removed oil outlet 102. The mercury-containing natural gas then enters the mercury removal tower 3, which is in an adsorption state, through the corresponding first timing valve 2. The mercury in the mercury-containing natural gas is adsorbed within the regenerable adsorption packing. The mercury-removed natural gas is called mercury-removed natural gas and is discharged from the natural gas outlet 5 through the corresponding second timing valve 4. When the mercury removal tower 3 in the adsorption state reaches the predetermined processing time or the mercury removal effect deteriorates, it enters the regeneration state. A stream of mercury-removed natural gas at room temperature is drawn from between the corresponding second timing valve 4 and the natural gas outlet 5 using the regulating valve 6 and is called regeneration gas. The regeneration gas enters the mercury removal tower in the cold-blowing state through the corresponding third timing valve 7. The mercury removal tower 3 absorbs heat from the regenerable adsorption packing material and then enters the adsorption state after being cooled. The regenerated gas, after absorbing heat, enters the heater 9 through the corresponding fourth timing valve 8 and is further heated. After the temperature of the regenerated gas rises to the predetermined temperature, it enters the mercury removal tower 3 in the regeneration state through the corresponding fifth timing valve 10 and heats the regenerable adsorption packing material to precipitate elemental mercury. After the regenerated gas heats the regenerable adsorption packing material, its temperature drops and it becomes supplementary natural gas. The supplementary natural gas carries the precipitated mercury out of the mercury removal tower 3. The supplementary natural gas carrying mercury is called mercury-containing supplementary natural gas. The regenerated mercury removal tower 3 then enters the cooling state. The mercury-containing supplementary natural gas enters the cooler 12 through the corresponding sixth timing valve 11, where it is cooled and liquid mercury is precipitated. The gas-liquid mixture of supplementary natural gas and liquid mercury enters the gas-liquid separator 13 to achieve gas-liquid separation of supplementary natural gas and liquid mercury. The separated liquid mercury is discharged from the mercury-containing liquid outlet 1302 and transported externally in a sealed manner.

[0028] This invention utilizes the natural gas from the oil and gas plant itself within the gas stripping tower 1 to remove mercury from mercury-containing oil products. Simultaneously, a regenerable adsorption packing material in the mercury removal tower 3, which adsorbs mercury at room temperature and desorbs it at high temperature, removes the mercury entrained in the natural gas. The regenerable adsorption packing material in the mercury removal tower 3 does not directly contact the mercury-containing oil products. Since natural gas has a smaller molecular weight and fewer impurities compared to oil products, the regenerable adsorption packing material exhibits high adsorption efficiency and a long lifespan. This results in a significantly lower amount of difficult-to-treat solid waste containing high mercury content and a large amount of flammable and volatile oils compared to conventional methods. This solves the problem in the background technology where conventional mercury removal methods for light oils result in the adsorption medium being unable to regenerate due to direct contact with the mercury-containing oil products. Furthermore, it addresses the problem in the background technology where conventional mercury removal methods for oil products produce large quantities of difficult-to-treat solid waste containing high mercury content and a large amount of flammable and volatile oils. The solid waste includes the replaced adsorption medium or filtered sediment, wherein the adsorption medium is activated. The mercury is removed using carbon or molecular sieves. In this invention, a large amount of mercury is periodically discharged through the mercury-containing liquid outlet 1302 of the gas-liquid separator 13 and transported externally in a closed manner, thus avoiding contact with operators. Furthermore, since the regenerable adsorption packing in the mercury removal tower 3 does not directly contact the mercury-containing oil, it is not affected by the weight of the oil or the amount of impurities. When processing heavy oil, there is no need to use toxic or harmful media or media that easily react with other readily contactable substances to produce toxic or harmful substances, which can reduce the possibility of poisoning incidents. In addition, the frequency and duration of direct contact between operators and mercury-containing oil and solid waste in this invention are much lower than conventional practices. Moreover, if the mercury content in the natural gas in the oil and gas station does not meet the national standard, the mercury removal device of this invention can also remove the mercury carried in the natural gas. The natural gas carrying mercury can enter the gas stripping tower 1 through the natural gas inlet 103 and be discharged from the mercury-containing natural gas outlet 104 and enter the corresponding mercury removal tower 3.

[0029] The oil and gas station is a land-based station and offshore platform for oil and gas extraction and processing. The natural gas in the oil and gas station itself is natural gas extracted from underground during oil and gas development. The mercury-containing oil products are crude oil extracted from underground during oil and gas development or products of crude oil after separation.

[0030] The regulating valve 6 can regulate the flow rate of the regenerated gas, which is generally 1 / 3 of the total flow rate of the mercury-free natural gas.

[0031] Some of the light components in the oil are also distributed in the separated liquid mercury, so the separated liquid mercury can be called a high mercury content liquid.

[0032] The mercury-containing oil inlet 101 is located at the top of the stripping tower 1, the mercury-free oil outlet 102 is located at the bottom of the stripping tower 1, the natural gas inlet 103 is located at the bottom of the stripping tower 1, and the mercury-containing natural gas outlet 104 is located at the top of the stripping tower 1.

[0033] When mercury removal from oil is required, mercury-containing oil enters the stripping tower 1 from the top through the mercury-containing oil inlet 101, while natural gas enters the stripping tower 1 from the bottom through the natural gas inlet 103. The mercury-containing oil moves downwards and the natural gas moves upwards within the stripping tower 1, ensuring full contact and collision between the mercury-containing oil and the natural gas. The natural gas carries the mercury from the mercury-containing oil out of the stripping tower 1 through the mercury-containing natural gas outlet 104 at the top of the gas separator. The mercury-removed oil is then discharged from the bottom of the stripping tower 1 through the mercury-removed oil outlet 102.

[0034] In one embodiment, each of the second timing valves 4, the third timing valves 7, and the fifth timing valves 10 are respectively connected to the bottom of the corresponding mercury removal tower 3, and each of the first timing valves 2, the fourth timing valves 8, and the sixth timing valves 11 are respectively connected to the top of the corresponding mercury removal tower 3.

[0035] In the process of removing mercury from oil, mercury-containing natural gas enters the mercury removal tower 3 from the top of the adsorption state through the corresponding first timing valve 2. The mercury-removed natural gas is discharged from the bottom of the mercury removal tower 3 through the corresponding second timing valve 4 and enters the natural gas processing system from the natural gas outlet 5. The regenerated gas enters the mercury removal tower 3 from the bottom of the cold-blown state through the corresponding third timing valve 7 and absorbs the heat of the regenerable adsorption packing. The regenerated gas, after absorbing the heat, is discharged from the top of the mercury removal tower 3 through the corresponding fourth timing valve 8 and enters the heater 9 to be further heated. After the temperature of the regenerated gas rises to the predetermined temperature, it enters the mercury removal tower 3 from the bottom of the regenerated state through the corresponding fifth timing valve 10 and heats the regenerable adsorption packing to precipitate elemental mercury. The mercury-containing supplementary natural gas is discharged from the top of the mercury removal tower 3 through the corresponding sixth timing valve 11 and enters the cooler 12 to be cooled and precipitate liquid mercury.

[0036] The bottom of each mercury removal tower 3 is connected to the inlet of the natural gas outlet filter 14 through a corresponding second timing valve 4. The outlet of the natural gas outlet filter 14 is connected to the natural gas outlet 5 and the inlet of the regulating valve 6. The natural gas passing through the regulating valve 6 is called regenerated gas.

[0037] By setting up the natural gas outlet filter 14, solid impurities carried in the mercury-removed natural gas discharged from the bottom of the mercury removal tower 3 can be filtered out, preventing solid impurities carried in the mercury-removed natural gas from being led out through the regulating valve 6, thereby preventing the regenerated gas from carrying solid impurities into the mercury removal tower 3 in the cold-blowing state, and thus preventing solid impurities from affecting the subsequent adsorption effect of the regenerable adsorption packing in the mercury removal tower 3.

[0038] The top of each mercury removal tower 3 is connected to the inlet of the regeneration gas filter 15 via a corresponding sixth timing valve 11, and the outlet of the regeneration gas filter 15 is connected to the inlet of the cooler 12.

[0039] By setting up the regenerated gas filter 15, solid impurities carried in the mercury-containing supplementary natural gas discharged from the top of the mercury removal tower 3 can be filtered out, thus preventing solid impurities carried in the mercury-containing supplementary natural gas from entering the cooler 12.

[0040] In one embodiment, the mercury-containing natural gas outlet 104 is connected to the upstream end of each first timing valve 2 via a mercury-containing natural gas pipeline 16, and the downstream end of each first timing valve 2 is connected to the top of the corresponding mercury removal tower 3. The gas outlet 1303 of the gas-liquid separator 13 is connected to the mercury-containing natural gas pipeline 16 via a supplementary natural gas pipeline 17, and a compressor 18 is provided on the supplementary natural gas pipeline 17.

[0041] Since the supplementary natural gas separated from the gas-liquid separator 13 is mercury-saturated natural gas and its pressure is slightly lower than that of the mercury-containing natural gas from the gas stripping tower 1, it needs to be increased to a certain pressure by the compressor 18 before it is combined with the mercury-containing natural gas from the gas stripping tower 1 and enters the mercury removal tower 3 in an adsorption state.

[0042] Preferably, the gas-liquid inlet 1301 is located at the upper part of the gas-liquid separator 13, the mercury-containing liquid outlet 1302 is located at the bottom of the gas-liquid separator 13, and the gas outlet 1303 is located at the top of the gas-liquid separator 13.

[0043] In one embodiment, there are three mercury removal towers 3, one of which is in an adsorption state, the second is in a regeneration state, and the third is in a cold blowing state.

[0044] In one embodiment, the regenerable adsorption packing material is a silver-loaded molecular sieve.

[0045] The oil mercury removal device of this invention can achieve continuous mercury removal, effectively solving the problems of high mercury content in oil products posing a hazard to human health and causing equipment damage during development and utilization.

[0046] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. An oil product mercury removal device, characterized in that: The system includes a stripping tower (1), which has a mercury-containing oil inlet (101), a mercury-free oil outlet (102), a natural gas inlet (103), and a mercury-containing natural gas outlet (104). The mercury-containing natural gas outlet (104) is connected to each mercury removal tower (3) filled with regenerable adsorption packing through a corresponding first timing valve (2). Each mercury removal tower (3) is connected to the natural gas outlet (5) and the inlet of a regulating valve (6) through a corresponding second timing valve (4). The outlet of the regulating valve (6) is connected to a corresponding third timing valve (7). Each mercury removal tower (3) is connected to the inlet of the heater (9) via a corresponding fourth timing valve (8). The outlet of the heater (9) is connected to each mercury removal tower (3) via a corresponding fifth timing valve (10). Each mercury removal tower (3) is connected to the inlet of the cooler (12) via a corresponding sixth timing valve (11). The outlet of the cooler (12) is connected to the gas-liquid inlet (1301) of the gas-liquid separator (13). The liquid outlet of the gas-liquid separator (13) is the mercury-containing liquid outlet (1302).

2. The oil mercury removal device according to claim 1, characterized in that: The mercury-containing oil inlet (101) is located at the top of the stripping tower (1), the mercury-free oil outlet (102) is located at the bottom of the stripping tower (1), the natural gas inlet (103) is located at the bottom of the stripping tower (1), and the mercury-containing natural gas outlet (104) is located at the top of the stripping tower (1).

3. The oil mercury removal device according to claim 2, characterized in that: Each of the second timing valves (4), the third timing valves (7) and the fifth timing valves (10) are connected to the bottom of the corresponding mercury removal tower (3), and each of the first timing valves (2), the fourth timing valves (8) and the sixth timing valves (11) are connected to the top of the corresponding mercury removal tower (3).

4. The oil mercury removal device according to claim 3, characterized in that: The bottom of each of the mercury removal towers (3) is connected to the inlet of the natural gas outlet filter (14) through a corresponding second timing valve (4). The outlet of the natural gas outlet filter (14) is connected to the natural gas outlet (5) and the inlet of the regulating valve (6). The natural gas passing through the regulating valve (6) is called regenerated gas.

5. The oil mercury removal device according to claim 3, characterized in that: The top of each of the mercury removal towers (3) is connected to the inlet of the regeneration gas filter (15) via a corresponding sixth timing valve (11), and the outlet of the regeneration gas filter (15) is connected to the inlet of the cooler (12).

6. The oil mercury removal device according to claim 2, characterized in that: The mercury-containing natural gas outlet (104) is connected to the upstream end of each first timing valve (2) via a mercury-containing natural gas pipeline (16), and the downstream end of each first timing valve (2) is connected to the top of the corresponding mercury removal tower (3). The gas outlet (1303) of the gas-liquid separator (13) is connected to the mercury-containing natural gas pipeline (16) via a supplementary natural gas pipeline (17), and a compressor (18) is provided on the supplementary natural gas pipeline (17).

7. The oil mercury removal device according to claim 6, characterized in that: The gas-liquid inlet (1301) is located at the top of the gas-liquid separator (13), the mercury-containing liquid outlet (1302) is located at the bottom of the gas-liquid separator (13), and the gas outlet (1303) is located at the top of the gas-liquid separator (13).

8. The oil mercury removal device according to claim 2, characterized in that: There are three mercury removal towers (3), one of which is in an adsorption state, the second is in a regeneration state, and the third is in a cold blowing state.

9. The oil mercury removal device according to claim 2, characterized in that: The regenerable adsorption packing material is a silver-loaded molecular sieve.

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