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CN-121570909-B - Coalescence type filter and triethylene glycol dewatering device

CN121570909BCN 121570909 BCN121570909 BCN 121570909BCN-121570909-B

Abstract

The application belongs to the technical field of natural gas dehydration and discloses a coalescing filter and a triethylene glycol dehydration device, wherein the coalescing filter comprises a shell, a gas baffle, a filter core and a guide plate, a gas containing cavity is arranged in the shell, the shell is provided with a gas inlet and a gas outlet, the gas baffle is arranged in the gas containing cavity and divides the gas containing cavity into a first cavity and a second cavity which is positioned above the first cavity, the gas baffle is provided with a communication port which is communicated with the first cavity and the second cavity, the gas inlet is communicated with the first cavity, the gas outlet is communicated with the second cavity, the filter core is positioned in the second cavity and is used for blocking water, the aperture of the central hole is gradually increased from bottom to top, the guide plate is arranged in the central hole, the guide plate is configured to guide gas entering the central hole so that part of the gas flows along the radial direction of the central hole, and the rest of the gas flows along the axial direction of the central hole, thereby improving the dehydration effect of the coalescing filter on the natural gas.

Inventors

  • JIANG WENCHAO
  • ZHANG TENGCHAO
  • LIU MING
  • LI GUOZHU

Assignees

  • 山东豪迈机械制造有限公司
  • 山东豪迈重型装备有限公司

Dates

Publication Date
20260508
Application Date
20260129

Claims (8)

  1. 1. A coalescing filter, comprising: The device comprises a shell (11), wherein an air accommodating cavity is formed in the shell (11), and the shell (11) is provided with an air inlet and an air outlet; the air blocking plate (12) is arranged in the air accommodating cavity and divides the air accommodating cavity into a first cavity and a second cavity positioned above the first cavity, the air blocking plate (12) is provided with a communication port (121) for communicating the first cavity with the second cavity, the air inlet is communicated with the first cavity, and the air outlet is communicated with the second cavity; The filter element (13) is positioned in the second cavity and used for blocking water, a central hole opposite to the communication port (121) is formed in the filter element (13), and the aperture of the central hole is gradually increased from bottom to top; A baffle (14), the baffle (14) being disposed in the central bore, and the baffle (14) being configured to direct gas entering the central bore such that a portion of the gas flows radially of the central bore and a remaining portion of the gas flows axially of the central bore; The guide plates (14) are spirally arranged along the axial direction of the central hole so as to form a spiral channel inside the central hole; The pitch of the guide plate (14) is gradually increased from bottom to top, and a sealing plate (141) for sealing the top orifice of the central hole is arranged at the top of the filter element (13).
  2. 2. The coalescing filter according to claim 1, wherein the filter cartridge (13) comprises a support skeleton (131), a first water filtering layer (132) arranged outside the support skeleton (131), and a second water filtering layer (133) arranged outside the first water filtering layer (132), wherein the diameter of the support skeleton (131) is gradually increased from bottom to top.
  3. 3. The coalescing filter according to claim 2, wherein the first water-filtering layer (132) is composed of hydrophobic fibers wound on the outside of the supporting skeleton (131), the winding density of the hydrophobic fibers being gradually reduced from bottom to top; And/or the second water filtering layer (133) is formed by folding filter materials sleeved outside the first water filtering layer (132), and the pleat depth of the folding filter materials is gradually increased from bottom to top.
  4. 4. The coalescing filter according to claim 1, wherein the coalescing filter (1) further comprises a honeycomb rectifier (111) in the second cavity, the honeycomb rectifier (111) being provided at the air outlet.
  5. 5. Triethylene glycol dewatering device, characterized by comprising an absorption tower (2), a regeneration tower (3), a reboiler (4), a first heat exchanger (5), a circulation pump (6), a flash tank (7) and a coalescing filter (1) according to any of the preceding claims 1-4, wherein the gas outlet of the coalescing filter (1) is communicated with the feed gas inlet of the absorption tower (2), the absorbent outlet of the absorption tower (2) is communicated with the inlet of a condenser tube (31) of the regeneration tower (3), the outlet of the condenser tube (31) is communicated with one channel of the first heat exchanger (5) and is communicated with the flash tank (7), the flash tank (7) is communicated with the absorbent inlet of the regeneration tower (3), the reboiler (4) is positioned at the bottom of the regeneration tower (3) and is communicated with the regeneration tower (3), the absorbent outlet of the reboiler (4) is communicated with the other channel of the first heat exchanger (5) and is communicated with the absorbent inlet of the circulation pump (6), and the absorbent inlet of the circulation pump (6) is communicated with the absorbent inlet of the circulation pump (2).
  6. 6. A triethylene glycol dehydration unit according to claim 5, wherein the first heat exchangers (5) are provided with two and each are microchannel heat exchangers, one of the first heat exchangers (5) being located between the regeneration column (3) and the flash tank (7), the other first heat exchanger (5) being located between the flash tank (7) and the regeneration column (3), and a double filter (51) being provided upstream of each first heat exchanger (5).
  7. 7. A triethylene glycol dehydration device according to claim 5, further comprising a power storage module (9) for powering the circulation pump (6), a wind power generator set (91) for charging the power storage module (9), and a solar power generator set (92) for charging the power storage module (9).
  8. 8. The triethylene glycol dehydration device according to claim 7, further comprising a supporting rod (93), wherein the wind generating set (91) is arranged at the top of the supporting rod (93), the supporting rod (93) is provided with a tracking type support (94) arranged at the bottom of the wind generating set (91), the solar generating set (92) is arranged on the tracking type support (94), and the tracking type support (94) can adjust the solar generating set (92) along with the irradiation angle of the sun.

Description

Coalescence type filter and triethylene glycol dewatering device Technical Field The application belongs to the technical field of natural gas dehydration, and particularly relates to a coalescing filter and a triethylene glycol dehydration device. Background The natural gas dehydration is a process for removing water from natural gas, and the necessity is that the water content of the natural gas can cause pipeline corrosion, hydrate blockage and increase gas transmission power consumption, and common dehydration methods comprise cooling dehydration, absorption dehydration, adsorption dehydration and membrane separation technology dehydration, and the absorption dehydration is most common because the absorption dehydration has the advantages of strong dehydration capability on the natural gas, good thermal stability, no chemical reaction during dehydration, easy regeneration and the like. The absorption dehydration is to make use of the strong affinity of triethylene glycol to water so as to enable water molecules in natural gas to be absorbed into liquid phase when the triethylene glycol contacts with natural gas, then, the water-rich triethylene glycol is conveyed into a regeneration tower for regeneration, the water-poor triethylene glycol is recovered and regenerated, then, the water-poor triethylene glycol is conveyed into an absorption tower so as to absorb water molecules in natural gas flowing through the absorption tower by using the regenerated water-poor triethylene glycol, when the triethylene glycol is recovered and regenerated, the triethylene glycol needs to be heated so as to enable the water molecules to be separated from the triethylene glycol in the form of water vapor after the triethylene glycol reaches the self boiling point, however, the regeneration cost of the triethylene glycol is higher due to the large circulating regeneration amount of the triethylene glycol, and the use cost of the triethylene glycol dehydration device is increased. In order to reduce the use cost of the triethylene glycol dehydration device, the natural gas is pretreated by utilizing a coalescing filter, liquid water in the natural gas is filtered by utilizing the coalescing filter, and then the pretreated natural gas is introduced into an absorption tower, so that the triethylene glycol in the absorption tower is utilized to absorb water molecules in the natural gas again, thereby reducing the triethylene glycol absorption load, reducing the circulating regeneration amount of the triethylene glycol and further reducing the use cost of the triethylene glycol dehydration device, but the natural gas is easily entrained with liquid drops again when discharged through a filter element outlet due to the overhigh flow rate of a filter element outlet of the conventional coalescing filter, and further influencing the dehydration effect of the coalescing filter on the natural gas. Disclosure of Invention The application provides a coalescing filter to improve the dewatering effect of the coalescing filter on natural gas. The technical scheme adopted by the application is as follows: A coalescing filter, comprising: The shell is provided with an air accommodating cavity inside and is provided with an air inlet and an air outlet; The air blocking plate is arranged in the air accommodating cavity and divides the air accommodating cavity into a first cavity and a second cavity positioned above the first cavity, the air blocking plate is provided with a communication port communicated with the first cavity and the second cavity, the air inlet is communicated with the first cavity, and the air outlet is communicated with the second cavity; The filter element is positioned in the second cavity and used for blocking water, a central hole opposite to the communication port is formed in the filter element, and the aperture of the central hole is gradually increased from bottom to top; And the guide plate is arranged in the central hole and is configured to guide the gas entering the central hole so as to enable part of the gas to flow along the radial direction of the central hole and the rest of the gas to flow along the axial direction of the central hole. By adopting the technical scheme, when the coalescing filter is used for preprocessing natural gas, the natural gas is conveyed into the first cavity through the air inlet, so that the natural gas enters the second cavity through the communication port after entering the first cavity, the natural gas directly enters the central hole after passing through the communication port due to the fact that the central hole inside the filter element is opposite to the communication port, and the guide plate is positioned in the central hole, so that part of the natural gas entering the central hole flows along the radial direction of the central hole, the rest part of the natural gas moves along the axial direction of the central hole, the natural gas flowing along the radial directi