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CN-121988101-A - Gas-liquid separator for pre-dealkylation sledge and dealkylation process

CN121988101ACN 121988101 ACN121988101 ACN 121988101ACN-121988101-A

Abstract

The invention discloses a gas-liquid separator for a pre-dealkylation sledge and a dealkylation process, belonging to the technical field of gas-liquid separators, comprising a separation tank, the separation tank is internally provided with a gas-liquid pre-separation mechanism and a separation box, and the discharge end of the feed pipe is arranged corresponding to the pre-separation space, so that raw materials can be introduced into the gas-liquid pre-separation mechanism along the tangential direction. The separation tank is fixed between the inner top wall of the separation tank to form an overflow channel for oil to pass through. The separation box internally mounted has the water pipe, and the play water end of water pipe is equipped with liftable regulation weir pipe. According to the invention, through the cyclone action of the gas-liquid pre-separation mechanism, the traditional gravity sedimentation mode is replaced, the gas-liquid separation efficiency is greatly improved, and the problem of liquid level fluctuation caused by direct entry of raw material gas into a sedimentation area is solved. The liquid level in the separation box can be flexibly regulated and controlled by the regulating weir pipe, separation is realized aiming at the oil-water mixing layer, mutual entrainment of an oil phase and a water phase is avoided, purity of a separation product is improved, and subsequent treatment load is reduced.

Inventors

  • ZOU XIN
  • CHENG KUIWEI
  • ZHAO ZHONGYANG

Assignees

  • 河北宏科庆能环保设备有限公司

Dates

Publication Date
20260508
Application Date
20260331

Claims (10)

  1. 1. A gas-liquid separator for a pre-dealkylation sled, comprising: the separation tank (1), wherein the separation tank (1) is provided with a feed pipe (2) and an air outlet (101); The gas-liquid pre-separation mechanism (3) is arranged in the separation tank (1), the gas-liquid pre-separation mechanism (3) is provided with a pre-separation space (31) communicated with the feed pipe (2), and the feed pipe (2) is used for tangentially feeding feed gas into the pre-separation space (31) so as to separate oil-water mixed liquid and gas from the feed gas in the pre-separation space (31) through a cyclone effect; The oil-water separation device comprises a separation tank (4), wherein the separation tank is arranged in a separation tank (1), an overflow channel (41) through which oil liquid passes is formed between the top of the separation tank (4) and the inner top wall of the separation tank (1), a liquid outlet penetrating through the separation tank (1) is formed in the bottom of the separation tank (4), a water-through pipe (5) is arranged in the separation tank (4), the water inlet end of the water-through pipe (5) is communicated with the inner bottom of the separation tank (1) and is used for supplying water liquid at the bottom of the separation tank (1), the water outlet end of the water-through pipe (5) extends to the inner top of the separation tank (4), an adjusting weir pipe (6) is arranged at the water outlet end of the water-through pipe (5) in a lifting mode, the water outlet end of the adjusting weir pipe (6) can move in a lifting mode to adjust the water outlet height of the water-through pipe (5), the liquid level of the water-through pipe (4) is adjusted, and an oil-water mixing layer is controlled to pass through the overflow channel (41).
  2. 2. The gas-liquid separator for a pre-hydrocarbon removal skid according to claim 1, wherein the gas-liquid pre-separation mechanism (3) is disposed upward through the top of the separation tank (1), and the gas-liquid pre-separation mechanism (3) comprises: The cyclone separator (30) is arranged in the separation tank (1), the feeding pipe (2) is communicated with the side part of the cyclone separator (30), and a baffle plate group (33) for baffling raw gas to separate oil-liquid mixed liquid is arranged at the inner top part of the cyclone separator (30); One end of the exhaust pipe (32) is communicated with the top of the cyclone separator (30), the other end of the exhaust pipe penetrates through the outer wall of the separation tank (1) and is communicated with the separation tank (1), and the exhaust pipe (32) can convey pre-separated gas to the inner top of the separation tank (1) and enable the gas to be discharged from the air outlet (101).
  3. 3. The gas-liquid separator for a pre-hydrocarbon removal skid according to claim 2, wherein a gas flow guide plate (34) is connected to an inner top wall of the separation tank (1), an outlet of the exhaust pipe (32) faces the gas flow guide plate (34), and the gas flow guide plate (34) is used for guiding gas exhausted from the exhaust pipe (32) to the gas outlet (101).
  4. 4. The gas-liquid separator for the pre-hydrocarbon removal sledge according to claim 2, wherein a liquid distribution pipe group (10) extending towards the inner bottom of the separation tank (1) is communicated with the bottom of the cyclone separator (30), a liquid outlet is arranged at the bottom of the cyclone separator (30), the liquid outlet is communicated with the liquid distribution pipe group (10), and the liquid distribution pipe group (10) is used for guiding pre-separated liquid to the inner bottom of the separation tank (1).
  5. 5. A gas-liquid separator for a pre-hydrocarbon removal skid according to claim 3, characterized in that a plurality of coalescing packing elements (7) are arranged in the separation tank (1), the coalescing packing elements (7) are sequentially arranged between the gas-liquid pre-separation mechanism (3) and the separation tank (4), and the top surfaces of the coalescing packing elements (7) are flush with the gas flow guide plate (34).
  6. 6. The gas-liquid separator for a pre-hydrocarbon removal sledge according to claim 1, wherein a screw rod (8) for regulating the lifting height of the regulating weir pipe (6) is arranged on the regulating weir pipe (6), the screw rod (8) penetrates through the top wall of the separation tank (1) and is in rotary fit with the separation tank (1), the lower end of the screw rod (8) is in rotary connection with the regulating weir pipe (6), and a rotary table is arranged at the upper end of the screw rod (8).
  7. 7. The gas-liquid separator for a pre-hydrocarbon removal skid according to claim 5, wherein one side of the separation tank (4) close to the coalescing packing element (7) is an oil-water sedimentation zone (102), the other side of the separation tank (4) is an oil chamber (103), the oil-water sedimentation zone (102) is communicated with the oil chamber (103) through the overflow channel (41), an adjusting baffle (9) is arranged in the oil chamber (103), the adjusting baffle (9) is used for dividing the oil chamber (103) into a separation zone (113) and a discharge zone (123), and the adjusting baffle (9) is used for carrying out secondary separation sedimentation on an oil-water mixture overflowed to the separation zone (113).
  8. 8. A gas-liquid separator for a pre-dealkylation sled as claimed in claim 7 wherein the adjusting baffle (9) comprises: The fixed plate (91) is vertically arranged in the oil chamber (103) and connected to the inner top wall of the separation tank (1), and a through hole (910) is formed in the fixed plate (91); The fixed flow blocking covers (92) are arranged, the two fixed flow blocking covers (92) are respectively covered on two sides of the fixed plate (91), the two fixed flow blocking covers (92) are arranged up and down, an upper opening is formed in the fixed flow blocking cover (92) which is close to the separation box (4), a lower opening is formed in the fixed flow blocking cover (92) which is far away from the separation box (4), the upper opening and the lower opening are matched with the through holes (910) to form a bending flow channel, and the bending flow channel is used for allowing oil liquid on the upper layer in the separation area (113) to pass through and be sent to the discharge area (123); The sliding flow blocking covers (93) are two and correspond to the fixed flow blocking covers (92) one by one, the sliding flow blocking covers (93) are arranged on the outer wall of the fixed flow blocking covers (92) in a sliding mode, and the sliding flow blocking covers (93) can move up and down to enable oil in the separation area (113) to enter the bending flow channel.
  9. 9. The gas-liquid separator for a pre-dealkylation sled as set forth in claim 8, wherein the adjusting baffle (9) further includes: The adjusting screw (94) penetrates through the inner top wall of the separation tank (1) and is in running fit with the separation tank (1), a nut is arranged on one sliding flow blocking cover (93), and the adjusting screw (94) is in threaded connection with the nut; The middle part of the lever (95) is hinged with the fixed plate (91); the transmission rods (96) are two, one transmission rod (96) is hinged with one end of the lever (95), the other end of the transmission rod is hinged with one sliding flow blocking cover (93), the other transmission rod (96) is hinged with the other end of the lever (95), the other end of the transmission rod is hinged with the other sliding flow blocking cover (93), and the two sliding flow blocking covers (93) can move in opposite directions under the reverse transmission action of the lever (95).
  10. 10. A process for the dealkylation using a gas-liquid separator for a pre-dealkylation sled according to any one of claims 1-9, comprising the steps of: s1, tangentially feeding raw material gas into a pre-separation space (31) of a gas-liquid pre-separation mechanism (3) through a feed pipe (2), and separating oil-water mixed liquid and gas from the raw material gas by utilizing the cyclone effect; s2, discharging the gas separated in the step S1 from the gas outlet (101) of the separation tank (1) after treatment, and simultaneously settling the oil-water mixed solution obtained by separation to the inner bottom of the separation tank (1); S3, enabling water at the inner bottom of the separation tank (1) to enter the separation tank (4) through a water pipeline (5), and adjusting the drainage height of the water pipeline (5) through a lifting adjusting weir pipe (6), so as to adjust and control the liquid level height of the water in the separation tank (4); S4, controlling the oil-water mixing layer to enter the separation tank (4) through an overflow channel (41) between the top of the separation tank (4) and the inner top wall of the separation tank (1), and finally discharging the separated liquid through a liquid outlet at the bottom of the separation tank (4).

Description

Gas-liquid separator for pre-dealkylation sledge and dealkylation process Technical Field The invention belongs to the technical field of gas-liquid separators, and particularly relates to a gas-liquid separator for a pre-dealkylation sledge and a dealkylation process. Background In the pre-dealkylation sledge operation flow, a large amount of impurities such as oil liquid, water and the like are generally entrained in the raw material gas, and a gas-liquid separator is used as core pretreatment equipment, so that the separation efficiency and stability of the gas-liquid separator directly influence the operation effect, the equipment service life and the product purity of the subsequent dealkylation process. The prior equipment has the main structure of a closed separating tank, no additional gas-liquid pre-separating component is arranged in the tank, the layered separation is realized by only depending on natural standing of raw gas in the tank and utilizing the density difference of gas, liquid and oil, and the conventional working mode is that the raw gas is directly communicated into the separating tank, flows at a low speed in the tank and stands still, the gas is gathered upwards and is discharged from a top gas outlet, oil liquid and water are settled downwards due to higher density, an oil-water mixing layer is formed at the bottom of the tank and finally discharged through a liquid outlet at the bottom of the tank, and the gravity settling type gas-liquid separator is still widely applied to middle-small scale pre-hydrocarbon removing sledge operation due to simple structure and low manufacturing cost. At present, the gas-liquid separator adopted by the pre-dealkylation sledge has a simple structure, is generally realized by only relying on a single gravity sedimentation mode, lacks a targeted gas-liquid pre-separation mechanism, does not have a separation device specially aiming at an oil-water mixing layer, has a plurality of limitations in practical application, and is difficult to meet the high-efficiency separation requirement. The device has obvious limitations in practical application, namely, the device is low in sedimentation separation efficiency by gravity, tiny liquid drops in raw material gas cannot be removed rapidly, continuous operation requirements of a pre-hydrocarbon removal sledge are difficult to adapt, the raw material gas directly enters a sedimentation zone to easily cause fluctuation of liquid level in a tank to interfere layering effects of gas, liquid and oil water, an oil-free water mixing layer special regulation device is arranged, an overflow weir is of a fixed structure, the liquid level cannot be regulated flexibly according to working conditions, oil-water separation precision is poor, oil phase and water phase are entrained with each other, purity of separated products is reduced, and subsequent treatment load is increased. Disclosure of Invention The invention aims to provide a gas-liquid separator for a pre-dealkylation sledge and a dealkylation process, so as to make up for the defects of the existing single gravity sedimentation equipment, realize the collaborative operation of rapid gas-liquid pre-separation and targeted separation of an oil-water mixing layer, improve the separation precision and efficiency and adapt to the high-efficiency stable operation requirement of the pre-dealkylation sledge. To achieve the above object, an embodiment of the present invention provides a gas-liquid separator for a pre-hydrocarbon removal skid, including: the separating tank is provided with a feeding pipe and an air outlet; The gas-liquid pre-separation mechanism is arranged in the separation tank and is provided with a pre-separation space communicated with the feeding pipe, and the feeding pipe is used for tangentially feeding raw gas into the pre-separation space so as to separate oil-water mixed liquid and gas from the raw gas in the pre-separation space through the cyclone effect; the oil-water mixing device comprises a separating tank, wherein the separating tank is arranged in the separating tank, an overflow channel for oil liquid to pass through is formed between the top of the separating tank and the inner top wall of the separating tank, a liquid outlet penetrating through the separating tank is formed in the bottom of the separating tank, a water pipeline is arranged in the separating tank, the water inlet end of the water pipeline is communicated with the inner bottom of the separating tank and is used for allowing water liquid at the bottom of the separating tank to enter, the water outlet end of the water pipeline extends to the inner top of the separating tank, an adjusting weir pipe is arranged at the water outlet end of the water pipeline in a lifting mode, the adjusting weir pipe can move in a lifting mode to adjust the water discharge height of the water pipeline, the liquid level height of the water liquid in the separating tank is regulated, and