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CN-121971966-A - Natural gas dewatering device

CN121971966ACN 121971966 ACN121971966 ACN 121971966ACN-121971966-A

Abstract

The invention discloses a natural gas dehydration device applied to the technical field of natural gas treatment, which forms a lifting type combination through the cooperation of an electric push rod and a drying component, and realizes dynamic switching of rising and falling when a molecular sieve piece needs to be replaced, so that a drying blank period is avoided, and continuous dehydration is ensured on the premise of not stopping. When the drying component is replaced, the dynamic partition in the lifting process is realized by utilizing the size difference of the heat insulation frame, and the regenerative heat is prevented from entering the dewatering cylinder. The suction pump integrates the triple functions of gas recovery, regeneration gas supply and working cooling, namely, recovering residual natural gas in a regeneration box after switching and returning the residual natural gas to a dehydration cylinder to avoid gas loss, introducing external cold air for heating during regeneration treatment and flushing a molecular sieve piece for regeneration treatment, introducing air flow introduced by a second pipe into an auxiliary cooling pipe and a cooling frame through the molecular pipe, cooling the molecular sieve piece in working, and prolonging the adsorption saturation time of the molecular sieve piece in working.

Inventors

  • ZHANG YONGNENG
  • HONG GANG

Assignees

  • 四川羿能油气技术有限公司

Dates

Publication Date
20260505
Application Date
20260401

Claims (8)

  1. 1. The natural gas dehydration device comprises a dehydration cylinder (1) with an air inlet (101) and an air outlet (102) respectively arranged at two sides, and is characterized in that a regeneration box (3) with an internal electric heater is arranged at the bottom of the dehydration cylinder (1), two groups of constraint grooves which are symmetrically arranged are arranged in the dehydration cylinder (1), the two groups of constraint grooves penetrate through the inner wall of the regeneration box (3), the two groups of constraint grooves are both connected with a drying assembly in a sliding manner, the drying assembly comprises a heat insulation frame (6), a cooling frame (9) is arranged on the inner wall of the heat insulation frame (6), and a molecular sieve piece (8) with the same inner section is arranged in the cooling frame (9); The top of dehydration section of thick bamboo (1) is run through and is installed humidity transducer (2), and humidity transducer (2) are located the centre of restraint groove and gas outlet (102), one side surface that regeneration case (3) is close to gas outlet (102) runs through and installs discharge pipe (301), one side surface that regeneration case (3) is close to gas inlet (101) is installed suction pump (5), the output and the input of suction pump (5) are connected with tee bend one respectively and tee bend two, two outputs of tee bend one are connected with pipe (501) respectively and tail end extends to pipe No. two (502) of regeneration case (3), two inputs of tee bend two are connected with pipe No. three (503) and No. four (504) respectively, no. two pipe (502) are located auxiliary cooling pipe (7) that regeneration case (3) inside body's surface are connected with two tail ends and link up respectively with two cooling frame (9) through the bleeder.
  2. 2. The natural gas dehydration device according to claim 1, wherein the cross-section width value of the cooling frame (9) is smaller than the cross-section width value of the heat insulation frame (6), one-way valves are arranged in the discharge pipe (301), the third pipe (503), the fourth pipe (504) and the two auxiliary cooling pipes (7), and a waterproof ventilation plate and a filter screen are arranged at the air inlet position of the fourth pipe (504).
  3. 3. The natural gas dehydration device according to claim 1, wherein the auxiliary cooling pipe (7) comprises a metal corrugated pipe (703) subjected to corrosion prevention treatment, a heat insulation layer (702) is arranged on the inner side of the metal corrugated pipe (703), an air supply hose (701) is arranged in the heat insulation layer (702), an air outlet pipe (10) with the same structure as the auxiliary cooling pipe (7) is arranged in the cooling frame (9), and tail ends of the two air outlet pipes (10) extend to the outside of the regeneration box (3).
  4. 4. The natural gas dehydration device according to claim 1, wherein two electric push rods (4) are arranged below the regeneration box (3), the power end of each electric push rod (4) is connected with an outer sheath (401) with the inner diameter larger than the maximum outer diameter of each electric push rod (4), the height value of each outer sheath (401) is larger than the section height value of the regeneration box (3), the top of each outer sheath (401) is connected with the bottom of the heat insulation frame (6), and the outer sheaths (401) are connected with the regeneration box (3) in a sliding sealing mode.
  5. 5. The natural gas dehydration device according to claim 1, wherein the internal section height values of the dehydration cylinder (1) and the regeneration box (3) are the same, and the section height value of the drying component is larger than the internal section height value of the dehydration cylinder (1), the heat insulation frame (6) comprises a frame (601), a sealing ring (602) is installed on the outer side of the frame (601), a heat insulation sleeve (603) is installed on the outer side of the sealing ring (602), and a wear-resistant layer is installed on the outer side of the heat insulation sleeve (603).
  6. 6. A natural gas dehydration apparatus according to claim 1, wherein the first pipe (501) extends to the inside of the dehydration cylinder (1), the connection position of the first pipe (501) and the dehydration cylinder (1) is positioned in the middle of the air inlet (101) and the restriction groove, and the third pipe (503) is communicated with the regeneration box (3).
  7. 7. A natural gas dehydration device according to claim 3, wherein the tail end of one of the gas outlet pipes (10) is connected with a guide pipe (12), the tail end of the other gas outlet pipe (10) is communicated with the tail end of the other gas outlet pipe (10), the guide pipe (12) extends to the inside of the discharge pipe (301) in a penetrating way, the tail end of the guide pipe (12) is connected with a transfer pipe (11), and the tail end of the transfer pipe (11) extends to the inside of the regeneration box (3).
  8. 8. A natural gas dehydration apparatus according to claim 7, wherein a check valve is installed in the inside of said delivery pipe (12), the diameter value of said delivery pipe (12) is smaller than the diameter of the discharge pipe (301), the length value of the delivery pipe (12) positioned in the inside of the discharge pipe (301) is not smaller than four fifths of the length value of the discharge pipe (301), and the inside of said discharge pipe (301) and the inside of said transfer pipe (11) are coated with a heat-insulating coating.

Description

Natural gas dewatering device Technical Field The invention relates to the technical field of natural gas treatment, in particular to a natural gas dehydration device. Background Dehydration of natural gas is an essential ring in natural gas purification, and is mainly used for preventing water from forming solid natural gas hydrate at low temperature and high pressure to block pipelines and simultaneously preventing water and acid gases (such as hydrogen sulfide and carbon dioxide) from generating acid substances to corrode equipment. The prior art CN202510630593.8 discloses dewatering equipment and a dewatering method for purifying liquefied natural gas, wherein when a second clamping seat rotates to be right above a first clamping seat, a cylinder body is in a vertical installation state, and when the second clamping seat rotates to be far away from an installation block, the cylinder body is in a horizontal disassembly state, so that the disassembly and the assembly of a molecular sieve in a small modular molecular sieve dewatering system can be conveniently realized, and the operations of natural gas dewatering and molecular sieve regeneration can be simultaneously carried out. The prior art CN202410187890.5 discloses a natural gas dehydration device and a dehydration method, when the dryness does not reach the standard, at this time, the second electric valve is closed, and the valve bodies on the first auxiliary reflux circulation pipe and the second auxiliary reflux circulation pipe are opened, so that the natural gas flows back to the air inlet end of the conveying pipe again through the first auxiliary reflux circulation pipe and the second auxiliary reflux circulation pipe for performing the cyclic dehydration treatment, and the natural gas discharged from the tail end of the conveying pipe can be sufficiently dehydrated. The water absorption capacity of the molecular sieve is gradually saturated along with the progress of drying and dehydration operation, replacement or regeneration treatment is needed for the molecular sieve, and when the replacement treatment of the molecular sieve is carried out in the prior art, shutdown operation is needed, so that the dehydration operation of natural gas is forced to be interrupted, the dehydration efficiency is affected, and when the dehydration treatment is carried out, the molecular sieve absorbs water and releases heat, and when the temperature in the molecular sieve is increased along with the dehydration time, the adsorption saturation time of the molecular sieve is shortened. Disclosure of Invention The invention has the core that through the lifting cooperation of the electric push rod and the drying component, the dynamic switching of the rising and falling is realized when the molecular sieve piece is replaced, the dry blank period is avoided, the continuous dehydration without stopping is ensured, meanwhile, the air flow introduced by the second pipe enters the auxiliary cooling pipe and the cooling frame through the branch pipe, the molecular sieve piece in operation is cooled, the adsorption saturation time is prolonged, and the problems of dehydration efficiency reduction and molecular sieve adsorption saturation time shortening caused by stopping in the prior art are solved. And meanwhile, the gas after the cooling treatment of the molecular sieve and the high-temperature steam after the heat exchange are subjected to heat recycling through the discharge pipe, the switching pipe and the guide pipe, so that the heating regeneration cost is reduced. In order to solve the problems, the invention adopts the following technical scheme. The natural gas dehydration device comprises a dehydration cylinder with an air inlet and an air outlet respectively arranged at two sides, wherein a regeneration box with an internal electric heater is arranged at the bottom of the dehydration cylinder, two groups of constraint grooves which are symmetrically arranged are arranged in the dehydration cylinder, the two groups of constraint grooves penetrate through the inner wall of the regeneration box, the two groups of constraint grooves are respectively connected with a drying component in a sliding manner, the drying component comprises a heat insulation frame, a cooling frame is arranged on the inner wall of the heat insulation frame, and molecular sieve pieces with the same inner section are arranged in the cooling frame; The top of the dewatering cylinder is penetrated and is provided with a humidity sensor, the humidity sensor is positioned in the middle of the restriction groove and the air outlet, one side surface of the regeneration box, which is close to the air outlet, is penetrated and provided with a discharge pipe, one side surface of the regeneration box, which is close to the air inlet, is provided with a suction pump, the output end and the input end of the suction pump are respectively connected with a first three-way pipe and a second three-way