Coal bed gas dewatering device

Abstract

The utility model belongs to coal bed gas technical field discloses a coal bed gas dehydration device, including dehydration main part, dehydration main part one side is equipped with the air inlet pipe, and the top department of dehydration main part is equipped with the air outlet pipe, the inside of dehydration main part is sequentially provided with cyclone separation subassembly, coalescence strengthening subassembly and gas -liquid separation subassembly from top to bottom, the cyclone separation subassembly includes the conical cyclone tube cavity being equipped in the inside of dehydration main part. The utility model discloses through the cyclone separation subassembly, coalescence strengthening subassembly and gas -liquid separation subassembly that are equipped cooperate and dehydrate, break through the defect that traditional single dehydration mode is low in efficiency and poor in adaptability, and the setting of cyclone separation subassembly uses tangential inlet to produce strong centrifugal force and can be used to pre -remove big liquid drop, reduces the subsequent load, the setting of coalescence strengthening subassembly is used for forced airflow change, and micron level liquid drop is coalesced using V -shaped hydrophobic coalescence board, gas -liquid separation subassembly captures residual mist drop through the baffle demister, realizes the depth dehydration.

Description

Technical Field

[0001] This utility model relates to the field of coalbed methane technology, and in particular to a coalbed methane dehydration device. Background Technology

[0002] Coalbed methane refers to hydrocarbon gases stored in coal seams, mainly composed of methane, which are primarily adsorbed on the surface of coal matrix particles, with some remaining free in coal pores or dissolved in coal seam water. It is a associated mineral resource of coal, belonging to unconventional natural gas, and is a clean and high-quality energy source and chemical raw material that has emerged internationally in the last one or two decades.

[0003] Coalbed methane extraction is often accompanied by large amounts of liquid water and water vapor. Efficient dehydration is crucial for ensuring safe transportation, improving calorific value, and preventing pipeline corrosion. Traditional coalbed methane dehydration devices employ a single dehydration method, resulting in low dehydration efficiency and poor adaptability. Utility Model Content

[0004] To overcome the technical defects of the existing technology, this utility model provides a coalbed methane dehydration device.

[0005] The technical solution adopted by this utility model is: a coalbed methane dehydration device, including a dehydration body, an air inlet pipe on one side of the dehydration body, an air outlet pipe at the top center of the dehydration body, and a cyclone separation component, a coalescence enhancement component and a gas-liquid separation component arranged sequentially from top to bottom inside the dehydration body;

[0006] The cyclone separation assembly includes a conical cyclone cavity disposed inside the dehydration body, and the upper end of the conical cyclone cavity is provided with an air inlet channel that is connected to the air inlet pipe and is tangentially disposed to the conical cyclone cavity.

[0007] The coalescence strengthening component includes a conical shell at the bottom of the conical cyclone tube cavity, the inner wall of the conical shell is provided with a plurality of inclined and V-shaped hydrophobic coalescence plates, and the surface of the hydrophobic coalescence plates is provided with a micro-nano-scale hydrophobic coating.

[0008] The gas-liquid separation assembly includes a liquid collection tank located at the bottom of the conical shell. A baffle demister is provided at the top of the inside of the liquid collection tank. An exhaust pipe is provided in the middle of the baffle demister, which extends vertically upward and passes through the conical shell and the inside of the conical swirl tube cavity before connecting to the exhaust pipe.

[0009] Preferably, the inner bottom surface of the liquid collection tank is inclined from the side to the center, and the side of the inner bottom surface of the liquid collection tank is higher than the center of the inner bottom surface of the liquid collection tank.

[0010] Preferably, a drain pipe is provided at the center of the inner bottom surface of the liquid collection tank, and a liquid level control valve is installed on the drain pipe.

[0011] Preferably, the hydrophobic coalescing plate is inclined at 15°–30°.

[0012] Preferably, the dehydration body integrates a pressure adaptive adjustment component.

[0013] Preferably, the pressure adaptive adjustment component includes a pressure sensor installed on the air inlet pipe and an electric actuator that is linked to the liquid level control valve installed on the drain pipe.

[0014] Preferably, a PLC controller is installed on the outer wall of the dehydration body, and the electric actuator and pressure sensor are electrically connected to the PLC controller.

[0015] The beneficial effects of this utility model are as follows: by combining the cyclone separation component, the coalescence enhancement component, and the gas-liquid separation component for synergistic dehydration, it overcomes the shortcomings of traditional single dehydration methods, which are characterized by low efficiency and poor adaptability. The cyclone separation component utilizes tangential air intake to generate strong centrifugal force, which can be used to pre-dehydrate large droplets and reduce subsequent load. The coalescence enhancement component is used to force airflow to change direction and utilizes a V-shaped hydrophobic coalescence plate to coalesce micron-sized droplets. The gas-liquid separation component captures residual droplets through a baffle demister, achieving deep dehydration. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the baffle demister structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the hydrophobic coalescing plate structure of this utility model.

[0021] Explanation of reference numerals in the attached figures: 1. Dehydration body; 101. Air inlet pipe; 102. Air outlet pipe; 2. Cyclone separation assembly; 201. Conical cyclone cavity; 202. Air inlet channel; 3. Coagulation enhancement assembly; 301. Conical shell; 302. Hydrophobic coalescing plate; 303. Micro / nano-level hydrophobic coating; 4. Gas-liquid separation assembly; 401. Liquid collection tank; 402. Baffle demister; 403. Exhaust pipe; 404. Liquid drain pipe; 405. Liquid level control valve; 5. Pressure adaptive adjustment assembly; 501. Pressure sensor; 502. Electric actuator; 503. PLC controller. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment provides a coalbed methane dehydration device, including a dehydration body 1. An inlet pipe 101 is provided on one side of the dehydration body 1, and an outlet pipe 102 is provided at the top center of the dehydration body 1. The interior of the dehydration body 1 is arranged sequentially from top to bottom as a cyclone separation component 2, a coalescence enhancement component 3, and a gas-liquid separation component 4. The cyclone separation component 2 includes a conical cyclone cavity 201 disposed inside the dehydration body 1. The upper end of the conical cyclone cavity 201 is provided with an inlet channel 202 connected to the inlet pipe 101 and tangentially arranged to the conical cyclone cavity 201. The coalescence enhancement component 3 includes a conical shell 301 disposed at the bottom end of the conical cyclone cavity 201. The inner wall of the conical shell 301 is provided with multiple inclined, V-shaped hydrophobic coalescence plates 302. The surface of the hydrophobic coalescence plates 302 is provided with a micro-nano-level hydrophobic coating 303 to delay caking and extend the maintenance cycle. The gas-liquid separation component 4 includes a liquid collection tank 401 located at the bottom of the conical shell 301. A baffle demister 402 is located at the top of the liquid collection tank 401. An exhaust pipe 403, vertically upwards, passes through the conical shell 301 and the conical swirl tube 201 before connecting to the exhaust pipe 102, preventing secondary liquid carryover in the airflow. Through the coordinated dehydration of the swirl separation component 2, the coalescence enhancement component 3, and the gas-liquid separation component 4, the inefficiency and poor adaptability of traditional single-method dehydration are overcome. The swirl separation component 2 utilizes tangential air intake to generate strong centrifugal force, which can be used to pre-dehydrate large droplets, reducing subsequent load. The coalescence enhancement component 3 forces airflow to change direction, using a V-shaped hydrophobic coalescence plate 302 to coalesce micron-sized droplets. The gas-liquid separation component 4 captures residual droplets through the baffle demister 402, achieving deep dehydration.

[0024] The inner bottom surface of the liquid collection tank 401 is inclined from the side to the center, and the side of the inner bottom surface of the liquid collection tank 401 is higher than the center of the inner bottom surface of the liquid collection tank 401, guiding the liquid to converge at the center.

[0025] A drain pipe 404 is provided at the center of the inner bottom surface of the liquid collection tank 401. A liquid level control valve 405 is installed on the drain pipe 404 to automatically discharge the accumulated liquid according to the preset value.

[0026] The hydrophobic coalescing plate 302 is inclined at 15°–30°.

[0027] The dehydration body 1 integrates a pressure adaptive adjustment component 5, which includes a pressure sensor 501 installed on the air inlet pipe 101 and an electric actuator 502 linked to the liquid level control valve 405 installed on the drain pipe 404. A PLC controller 503 is installed on the outer wall of the dehydration body 1. The electric actuator 502 and the pressure sensor 501 are electrically connected to the PLC controller 503. When the pressure in the air inlet pipe 101 exceeds the limit, the PLC controller 503 sends a command to the electric actuator 502, causing the liquid level control valve 405 to open wider and reduce resistance.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0029] During operation, coalbed methane enters the conical vortex tube cavity 201 through the inlet pipe 101 and the tangentially set inlet channel 202. The high-speed rotating airflow generates strong centrifugal force, throwing large droplets against the wall of the conical vortex tube cavity 201 and falling along the conical surface into the conical shell 301. The gas carries small and medium droplets into the coalescence enhancement component. When passing through the V-shaped hydrophobic coalescence plate 302, the airflow changes direction multiple times. Due to inertia, the droplets collide with the plate wall, and the micro-nano hydrophobic coating 303 causes the droplets to rapidly coalesce and grow, detaching from the airflow and dripping downwards. The gas enters the baffle demister 402 at the top of the liquid collection tank 401. The droplets collide and coalesce on the surface of the baffle plate of the baffle demister 402. Liquid water flows along the wall into the bottom of the liquid collection tank 401. The dried gas rises through the exhaust pipe 403 to the outlet pipe 102. The pressure sensor 501 is used to monitor the pressure of the air inlet pipe 101 in real time. When the pressure is too high, the PLC controller 503 instructs the electric actuator 502 to open the liquid level control valve 405 to accelerate the discharge of liquid and reduce the system back pressure. Through the coordinated dehydration of the cyclone separation component 2, the coalescence enhancement component 3 and the gas-liquid separation component 4, the shortcomings of the traditional single dehydration method, such as low efficiency and poor adaptability, are overcome. The cyclone separation component 2 is set to generate strong centrifugal force by tangential air intake, which can be used to pre-dehydrate large droplets and reduce the subsequent load. The coalescence enhancement component 3 is set to force the airflow to change direction and use the V-shaped hydrophobic coalescence plate 302 to coalesce micron-sized droplets. The gas-liquid separation component 4 captures residual mist droplets through the baffle demister 402 to achieve deep dehydration.

[0030] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A coalbed methane dehydration device, comprising a dehydration body (1), wherein an air inlet pipe (101) is provided on one side of the dehydration body (1), and an air outlet pipe (102) is provided at the middle of the top of the dehydration body (1), characterized in that: The dehydration body (1) is provided with a cyclone separation component (2), a coalescence enhancement component (3) and a gas-liquid separation component (4) arranged from top to bottom inside; The cyclone separation component (2) includes a conical cyclone cavity (201) disposed inside the dehydration body (1). The upper end of the conical cyclone cavity (201) is provided with an air inlet channel (202) that is connected to the air inlet pipe (101) and is tangentially disposed to the conical cyclone cavity (201). The coalescence strengthening component (3) includes a conical shell (301) disposed at the bottom end of the conical swirl tube cavity (201), and the inner wall of the conical shell (301) is provided with a plurality of inclined and V-shaped hydrophobic coalescence plates (302), and the surface of the hydrophobic coalescence plates (302) is provided with a micro-nano-scale hydrophobic coating (303). The gas-liquid separation assembly (4) includes a liquid collection tank (401) located at the bottom of the conical shell (301). The top of the liquid collection tank (401) is provided with a baffle demister (402). The middle part of the baffle demister (402) is provided with an exhaust pipe (403) that is vertically upward and passes through the conical shell (301) and the conical swirl tube cavity (201) in sequence before being connected to the exhaust pipe (102).

2. The coalbed methane dehydration device according to claim 1, characterized in that: The inner bottom surface of the liquid collection tank (401) is inclined from the side to the center, and the side of the inner bottom surface of the liquid collection tank (401) is higher than the center of the inner bottom surface of the liquid collection tank (401).

3. The coalbed methane dehydration device according to claim 2, characterized in that: The liquid collection tank (401) has a drain pipe (404) at the center of its inner bottom surface, and a liquid level control valve (405) is installed on the drain pipe (404).

4. The coalbed methane dehydration device according to claim 1, characterized in that: The hydrophobic coalescing plate (302) is inclined at 15°–30°.

5. A coalbed methane dehydration device according to claim 3, characterized in that: The dehydration body (1) is equipped with a pressure adaptive adjustment component (5).

6. A coalbed methane dehydration device according to claim 5, characterized in that: The pressure adaptive adjustment component (5) includes a pressure sensor (501) installed on the air inlet pipe (101) and an electric actuator (502) that is linked to the liquid level control valve (405) installed on the drain pipe (404).

7. A coalbed methane dehydration device according to claim 6, characterized in that: The outer wall of the dehydration body (1) is equipped with a PLC controller (503), and the electric actuator (502) and pressure sensor (501) are electrically connected to the PLC controller (503).

Images