CN115253588A - Filling method and overpressure prevention device for Fischer-Tropsch paraffin chemical molecular sieve adsorption chamber filling agent - Google Patents
Filling method and overpressure prevention device for Fischer-Tropsch paraffin chemical molecular sieve adsorption chamber filling agent Download PDFInfo
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- CN115253588A CN115253588A CN202210740792.0A CN202210740792A CN115253588A CN 115253588 A CN115253588 A CN 115253588A CN 202210740792 A CN202210740792 A CN 202210740792A CN 115253588 A CN115253588 A CN 115253588A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B01J19/0006—Controlling or regulating processes
- B01J19/002—Avoiding undesirable reactions or side-effects, e.g. avoiding explosions, or improving the yield by suppressing side-reactions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
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Abstract
The invention discloses an overpressure prevention device for filling a Fischer-Tropsch alkane chemical molecular sieve adsorption chamber filling agent, which belongs to the technical field of molecular sieve adsorption chamber filling, and comprises: the device comprises a mounting support, a U-shaped water pipe filled with water is mounted on the front side wall of the mounting support, one end of the water pipe is communicated with a sampling port of a molecular sieve adsorption chamber, a scale plate parallel to the other end of the water pipe is mounted on the front side wall of the mounting support, a containing box is mounted on the outer wall of the mounting support and is communicated with an inner cavity at the other end of the water pipe through a connecting pipe, the device is communicated with the molecular sieve adsorption chamber for tightness detection through an overpressure prevention device, when overpressure occurs in the molecular sieve adsorption chamber, water in the water pipe of the overpressure prevention device can move in the inner cavity of the water pipe and is used for reducing air pressure in the molecular sieve adsorption chamber, the situation that overpressure occurs in the molecular sieve adsorption chamber in the detection process is avoided, and the molecular sieve adsorption chamber is protected.
Description
Technical Field
The invention relates to the technical field of filling of molecular sieve adsorption chambers, in particular to a filling method and an overpressure prevention device for a Fischer-Tropsch alkane chemical molecular sieve adsorption chamber filling agent.
Background
The molecular sieve adsorption is a device for separating Fischer-Tropsch synthesized paraffin, and a liquid-phase molecular sieve dewaxing process technology of a molecular sieve dewaxing simulated moving bed is used for producing fine chemical products such as high-quality normal paraffin, isoparaffin, normal hexane, normal heptane, light white oil and industrial white oil, and the NWA-III type molecular sieve has the advantages of low aromatic hydrocarbon retention, good selective adsorption property, good desorption property and good selective adsorption and desorption properties for heavy kerosene.
In the installation construction of the molecular sieve internal part, before the filling agent is filled, the tightness test of the molecular sieve adsorption chamber is needed, generally, the air pressure detection equipment is utilized to inflate and pressurize the interior of the molecular sieve adsorption chamber, and whether the pressure changes or not and whether the air leaks are detected to judge;
however, a protection mechanism is lacked in the detection process, when overpressure occurs inside the molecular sieve adsorption chamber due to too much air, the molecular sieve adsorption chamber cannot be depressurized in time, the molecular sieve adsorption chamber is easily damaged, and the detection effect is affected.
Disclosure of Invention
The invention aims to provide a filling method of a Fischer-Tropsch alkane chemical molecular sieve adsorption chamber filling agent and an overpressure prevention device, and aims to solve the problems that a protection mechanism is lacked in the detection process, and when overpressure occurs in the molecular sieve adsorption chamber due to excessive air filling, the molecular sieve adsorption chamber cannot be depressurized in time, and is easily damaged.
In order to achieve the purpose, the invention provides the following technical scheme: fischer-Tropsch alkane chemical industry molecular sieve adsorption chamber dress agent loads and uses anti superpressure device includes: mounting a bracket;
the water pipe is arranged on the front side wall of the mounting support in a U shape and filled with water, one end of the water pipe is communicated with a sampling port of the molecular sieve adsorption chamber, the front side wall of the mounting support is provided with a scale plate parallel to the other end of the water pipe, and when the water pipe detects that the internal pressure of the molecular sieve adsorption chamber is too high, the water in the water pipe can move, so that the communication space between the water pipe and the molecular sieve adsorption chamber is increased, and the communication space is used for reducing the internal pressure of the molecular sieve adsorption chamber;
the outer wall of the mounting bracket is provided with a containing box, and the containing box is communicated with the inner cavity at the other end of the water pipe through a connecting pipe.
Preferably, the bottom of the inner cavity of the containing box is provided with a main conducting piece, the outer wall of the containing box is provided with a prompting device electrically connected with the main conducting piece,
and an auxiliary conducting strip which is arranged above the main conducting strip and is electrically connected with an external power supply is arranged in the inner cavity of the containing box.
Preferably, the outer wall of the auxiliary conducting strip is provided with a mounting plate, the outer wall of the mounting plate is provided with a moving rod extending to the outer side of the top of the containing box,
the top wall of the storage box is provided with a mounting frame which is sleeved on the outer wall of the moving rod in a sliding mode, and the outer wall of the mounting frame is connected with a fixing bolt for fixing the moving rod in a threaded mode.
Preferably, one end of the water pipe, which is far away from the molecular sieve adsorption chamber, is sleeved with an installation sleeve, a movable pressing plate which moves along the length direction of the installation sleeve and hermetically divides the inner cavity of the installation sleeve is installed in the inner cavity of the installation sleeve, an elastic piece for limiting the movement of the movable pressing plate is installed in the inner cavity of the installation sleeve,
the inner cavity of the installation sleeve is internally provided with a touch switch above the movable pressing plate, and the touch switch is electrically connected with the prompting device and the tightness detection equipment.
Preferably, the installation cover outer wall is provided with an air vent communicated with the installation cover inner cavity and located above the movable pressing plate, the movable pressing plate outer wall is provided with a hole for allowing air in the water pipe to pass through, and the movable pressing plate outer wall is provided with a waterproof breathable film for preventing water in the water pipe from passing through the hole.
Preferably, the filling method of the Fischer-Tropsch paraffin chemical molecular sieve adsorption chamber filling agent utilizes an overpressure prevention device for filling the Fischer-Tropsch paraffin chemical molecular sieve adsorption chamber filling agent, and specifically comprises the following steps:
the first step is as follows: erecting a shed, a vertical ladder, a loading and unloading platform, a pre-assembly platform, a discharge hopper, an installation steel grating positioning block, a fixed steel grating clamp, a filling tool, a three-ply board, a switch valve, a blanking hose, a compressor, an induced draft fan, a winch, a portable dust collector and a water pressure gauge;
the second step: inspecting the steel grating components, assembling and numbering according to the installation sequence, and then installing the plywood outside the assembled steel grating;
the third step: carrying out sand blasting treatment on the inner wall of equipment on a molecular sieve adsorption tower, coating antirust oil, and then hoisting a steel grating plate to an installation area of a molecular sieve adsorption chamber for installation to form a grating bed layer;
the fourth step: after the steel grating is fixed, starting to install a distribution pipeline according to a distribution pipe assembly drawing and an actual measurement distance of a flange opening at the top of the on-site grating;
the fifth step: after the piping is finished, filling a ceramic rope in a gap between the cylinder wall and the steel grating, filling the ceramic rope in a cavity at the positions of the thermometer, the sampling valve and the connecting pipe, and compacting the filled ceramic rope;
and a sixth step: the method comprises the steps that a tightness detection device is used for conducting subsection tightness testing on a molecular sieve adsorption chamber, a water pipe of an overpressure prevention device is communicated with a sampling port of the molecular sieve adsorption chamber in the testing process, when the pressure inside the molecular sieve adsorption chamber is too high, water inside the water pipe can move in the water pipe and is used for reducing the pressure inside the molecular sieve adsorption chamber, when the moving amplitude of the water is too high, the water inside the water pipe enters an inner cavity of a containing box through a connecting pipe, a main conducting sheet and an auxiliary conducting sheet are submerged, a prompting device is powered on to send out a prompt, the tightness detection device is closed or reduced in time, after the molecular sieve adsorption chamber is detected, a cleaning cloth soaked with soap water is used for wiping at a welding part of the testing, and the tightness of a welding line is detected;
the seventh step: the molecular sieving agent, the grid bed layer and the distributor pipeline installation process are alternately carried out, in the molecular sieving agent, a hopper is lifted to the position above an access hole at the top of equipment, a control valve is opened, so that the charging agent enters the bed layer of an adsorption chamber through a charging agent hose, is trampled, and is flattened by a scraper;
eighth step: connecting a clean and oilless instrument gas source to an emptying joint of a manhole at the top of an adsorption chamber, pressurizing a container to a preset value, detecting whether the pressure is reduced or not, if no pressure is reduced, the container is qualified after being subjected to leakage inspection, purging the adsorption chamber, after the adsorption chamber is cleaned, connecting a test basket to a ball valve discharge port, opening the adsorption chamber again to control the ball valve to release pressure, and if no adsorbent appears in the test basket, proving that the adsorbent is qualified, recovering a top layer grating communication pipe and a bottom layer grating communication pipe, and performing nitrogen filling protection on the adsorption chamber.
Preferably, the ceramic rope stuffing height is greater than or equal to the top height of the steel grating.
Compared with the prior art, the invention has the beneficial effects that: the device is communicated with the molecular sieve adsorption chamber for tightness detection through the overpressure prevention device, when the interior of the molecular sieve adsorption chamber is in overpressure, water in a water pipe of the overpressure prevention device can move in an inner cavity of the water pipe, the air pressure in the molecular sieve adsorption chamber is reduced, the situation that overpressure occurs in the interior of the molecular sieve adsorption chamber in the detection process is avoided, and the molecular sieve adsorption chamber is protected.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the storage box of the present invention;
FIG. 3 is an enlarged view of the structure at A of the present invention;
FIG. 4 is a schematic view of the connection structure of the mounting sleeve and the movable platen according to the present invention;
FIG. 5 is a schematic view of the bottom grid installation of the present invention;
FIG. 6 is a schematic view of the assembly of the intermediate layer grid of the present invention;
FIG. 7 is a schematic view of the grid assembly of the present invention;
FIG. 8 is a schematic view of the grid and vessel wall gap ceramic packing of the present invention.
In the figure: 1. mounting a bracket; 2. a water pipe; 3. a scale plate; 4. a storage box; 5. connecting pipes; 6. installing a sleeve; 7. a main conductive sheet; 8. a sub conductive sheet; 9. a prompting device; 10. mounting a plate; 11. a travel bar; 12. installing a frame; 13. fixing the bolt; 14. an elastic member; 15. moving the pressing plate; 16. a touch switch; 17. a vent hole; 18. opening a hole; 19. waterproof ventilated membrane.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1, 2 and 3, the overpressure preventing device for loading the fischer-tropsch paraffin chemical molecular sieve adsorbent into the adsorption chamber comprises: a pressure reducing member and a protective member;
the pressure reducing component comprises an installation support 1, a water pipe 2 and a scale plate 3, the water pipe 2 is fixedly installed on the front side wall of the installation support 1 through a fixing mechanism, the water pipe 2 is arranged on the front side of the installation support 1 in a U shape, water is filled in the water pipe 2, the water pipe 2 is made of transparent materials and specifically made of transparent PVC (polyvinyl chloride) pipes, the fixing mechanism is a pipe clamp, the scale plate 3 is installed on the front side wall of the installation support 1 (the scale plate 3 is a plate with scale lines and vertically installed on the front side wall of the installation support 1, and the scale plate 3 is parallel to the left end of the water pipe 2), when the molecular sieve adsorption chamber is subjected to tightness detection, the right end of the water pipe 2 is communicated with a sampling port of the molecular sieve adsorption chamber, gas is injected into the molecular sieve adsorption chamber to be detected through tightness detection equipment (an air pump), so that the air pressure in the molecular sieve adsorption chamber is increased (the tightness of the molecular sieve adsorption chamber is judged through detection of air pressure change), the water in the water pipe 2 can also be moved in the water pipe 2, and the overpressure adsorption chamber is prevented from being communicated with the molecular sieve adsorption chamber when the overpressure detection space in the molecular sieve adsorption chamber is detected, and the overpressure molecular sieve adsorption chamber is reduced;
the protection component comprises a storage box 4, a connecting pipe 5, a main conducting sheet 7, an auxiliary conducting sheet 8, a prompting device 9, a mounting plate 10, a moving rod 11, a mounting frame 12 and a fixing bolt 13, wherein the storage box 4 is mounted on the outer wall of the front side of the mounting support 1, the connecting pipe 5 is mounted between the right side wall of the storage box 4 and the outer wall of the left end of the water pipe 2, the storage box 4 is communicated with the inner cavity of the water pipe 2 through the connecting pipe 5, and the connecting area of the connecting pipe 5 and the left end of the water pipe 2 is located above the water surface;
a main conducting strip 7 is installed at the bottom of an inner cavity of the containing box 4, a mounting plate 10 is installed on the left side wall of the inner cavity of the containing box 4 in a sliding mode, the mounting plate 10 can move up and down in the inner cavity of the containing box 4, a moving rod 11 is installed on the top wall of the mounting plate 10, a mounting frame 12 is installed on the top wall of the containing box 4, the top end of the moving rod 11 penetrates through the mounting frame 12 (the moving rod 11 can move up and down in the inner cavity of the mounting frame 12), a fixing bolt 13 is screwed on the left side wall of the mounting frame 12, the right side of the fixing bolt 13 penetrates through the mounting frame 12 to be attached to the outer wall of the moving rod 11, the fixing bolt 13 is unscrewed, the moving rod 11 is pulled upwards or downwards, the mounting plate 10 drives an auxiliary conducting strip 8 to move up and down, the distance between the auxiliary conducting strip 8 and the main conducting strip 7 is changed, the auxiliary conducting strip 8 is located above the main conducting strip 7, a certain distance exists between the auxiliary conducting strip 8 and is connected with an external power supply through a wire, a prompting device 9 is installed on the left outer wall of the containing box 4, and the prompting device 9 is connected with the main conducting strip 7 through a wire (the prompting device 9 is an LED lamp or an alarm);
when the overpressure inside the molecular sieve adsorption chamber is generated, water in the water pipe 2 can move in the water pipe 2, the movement amplitude of the water is influenced by the air pressure of the molecular sieve adsorption chamber (the air pressure is larger, the movement amplitude is larger), when the overpressure of the molecular sieve adsorption chamber is larger, the water surface at the left end of the water pipe 2 is higher than the connecting pipe 5, the water is stored in the inner cavity of the storage box 4 from the connecting pipe 5 (the water is prevented from being directly sprayed to the outside), the water can submerge the main conducting plate 7 and the auxiliary conducting plate 8 along with the increase of the amount of the water entering the storage box 4, the prompting device 9 is powered on to send a prompt for prompting a worker, the worker can know the overpressure inside of the molecular sieve adsorption chamber in time, the tightness detection device can be timely turned off or turned down, and the molecular sieve adsorption chamber is protected.
Example 2:
referring to fig. 1 and 4, on the basis of embodiment 1, a mounting sleeve 6 is sleeved on the top of the outer wall of the left end of a water pipe 2, a movable pressing plate 15 is slidably mounted in the inner cavity of the mounting sleeve 6, the movable pressing plate 15 can move up and down in the inner cavity of the mounting sleeve 6, the inner cavity of the mounting sleeve 6 is divided into two mutually sealed cavities by the movable pressing plate 15, an opening 18 is formed in the outer wall of the movable pressing plate 15 in a penetrating manner to communicate the sealed and divided cavities, a vent hole 17 is formed in the top wall of the mounting sleeve 6 to communicate the inner cavity of the mounting sleeve 6 with the outside, a waterproof breathable film 19 is mounted on the bottom wall of the movable pressing plate 15 to allow air to pass through the movable pressing plate 15, but water is not allowed, when the water surface of the left end of the water pipe 2 rises, air at the left end of the water pipe 2 can be discharged, an elastic member 14 (spring) is mounted between the top wall of the inner cavity of the mounting sleeve 6 and the top wall of the movable pressing plate 15, a touch switch 16 is mounted on the top of the inner cavity of the mounting sleeve 6, the touch switch 16 is located above the movable pressing plate 15, the touch switch 16 is electrically connected with a prompting device 9 through a wire, and a tightness detection device;
when the air pressure in the molecular sieve adsorption chamber rises too fast, the water surface at the left end of the water pipe 2 rises fast, and water cannot be discharged into the inner cavity of the containing box 4 from the connecting pipe 5 fast (when the water enters the containing box 4, the water surface at the left end of the water pipe 2 rises), the water surface pushes the movable pressing plate 15 to move upwards, the movable pressing plate 15 presses the touch switch 16, the prompting device 9 sends out a prompt, the detection mode and the sensitivity of the prompting device 9 are increased, the power supply of the tightness detection equipment is cut off, and the continuous rising of the air pressure in the molecular sieve adsorption chamber is avoided;
compared with the embodiment 1, the installation sleeve 6, the movable pressing plate 15 and other parts are added, so that the excessive air pressure in the molecular sieve adsorption chamber is avoided.
Referring to fig. 5 and 6, fig. 7 and 8, the method for filling the fischer-tropsch alkane chemical molecular sieve adsorbent chamber with the overpressure prevention device for filling the fischer-tropsch alkane chemical molecular sieve adsorbent chamber specifically includes the following steps:
the first step is as follows: preparation before construction, installation procedures of internal parts of the molecular sieve reactor are complicated, and preparation is sufficient before construction: erecting a shed, a vertical ladder, a loading and unloading platform, a pre-assembly platform, a discharge hopper, an installation steel grating positioning block, a fixed steel grating clamp, a filling tool, a three-ply board, a switch valve, a blanking hose, a compressor, an induced draft fan, a winch, a portable dust collector, a water pressure gauge and the like;
the second step: checking, acceptance and pre-assembling the steel grating components: because the gap between the upper and lower filter screens of the grid is designed to be 0.13 +/-0.02 mm, the gap standard of the molecular screen is crucial to the product quality, the appearance of the welding seam of the screen is checked by adopting an eye measurement method, the gap between the strip-shaped screens of the screen is checked by a feeler gauge, and the cleanliness of the screen is checked by adopting a magnifier;
during assembly, the grid screens are self-numbered according to the installation sequence in an assembly drawing, and the grid screens are protected by adopting plywood after assembly is finished;
the third step: installing an adsorption chamber grid:
before the molecular sieve adsorption tower internal parts are installed, the inner wall of the equipment is subjected to sand blasting treatment to achieve rust-free and expose metal luster, and rust-proof oil is coated;
when the steel grating plates are installed, hoisting by using a winch, slowly hoisting and lightly hoisting, firstly hoisting the arch-shaped grating plates at the edge parts, then hoisting the middle grating plates for sequential construction, forbidding the grating plates to collide with other members in the moving process, and repairing or replacing the steel grating plates if the steel grating plates are damaged;
the finished product of the molecular sieve grid is simplified and fixed:
the bottom layer (13 #) grating consists of 6 grating components, a steel grating plate is directly placed on a T-shaped supporting beam, the grating components are welded and sealed by adopting T-shaped plates, the periphery of the grating is supported by a cylinder wall ring plate, and a gap between the steel grating and the cylinder wall of the equipment is welded and sealed by adopting stainless steel angle steel;
the middle layer steel grating (2-12 # layer) is combined in 3 types, the 2# bed layer is composed of 8 gratings, the 3 rd, 5 th, 7 th, 9 th and 11 th layers are composed of 6 gratings, the 4 th, 6 th, 8 th, 10 th and 12 th layers are composed of 5 gratings, the gratings are horizontally placed on the supporting beam, the grating components are fixed by adopting a wedge-shaped positioning plate, the periphery of the grating is filled and compacted by adopting ceramic ropes, and the top of the grating is compressed by positioning bolts on the periphery of the cylinder wall of the equipment;
the top layer grid bed layer consists of 10 grid components, the assembly requirement is compared with the assembly of the bottom layer grid, the step of filling and compacting the periphery of the grid by adopting ceramic ropes is added, and the rest is the same as the bottom layer structure;
the fourth step: after the grid is fixed, the distribution pipelines are started to be installed according to a distribution pipe assembly drawing and the actual measurement distance of a flange opening at the top of the grid on site, the distributor connecting pipe orifice groups are fixed in place by adopting limiting plates in a spot welding mode, the coaxiality of each pipeline orifice group is controlled within 3mm, and the situation that stress exists in the distributor pipelines is avoided;
the fifth step: after the piping is finished, a ceramic rope is filled in a gap between the cylinder wall and the grating, the ceramic rope is filled and compacted, the filling height is at least level with or slightly higher than the top of the grating, 5-6 layers of the ceramic rope is needed, meanwhile, the ceramic rope is used for filling the containing cavity at the positions of the thermometer, the sampling valve and the connecting pipe, when the ceramic rope is filled, the temporary positioning block is taken out from the space between the grating and the container wall, and the temporary positioning block is compacted by a filling tool and a hammer;
and a sixth step: and (3) testing the welding tightness of the grid bed layer and the distribution pipeline:
in order to test the quality of sealing welding of a T-shaped sealing plate and a cylinder wall among grid components with a grid ring plate and angle steel and prevent molecular sieve adsorbents and oil media from entering a lower end socket and an upper end socket of equipment, a molecular sieve adsorption chamber is specially required to be subjected to a sectional tightness test;
installing a blind plate at a flange of a communicating pipe at the lower part of a bottom grid, sealing interfaces of other equipment, connecting an instrument air connecting pipe from an L port of the equipment, connecting a self-made overpressure prevention device to a J port of a sampling port of a bottom end socket, wherein the diameter of a pipe of the overpressure prevention device is larger than that of a main pipe of the connected instrument air, and the pipe can be used as an overpressure prevention safety device and is pressurized to 486mm water column, the pressure value of a tightness test is 37KPa, the installation position of the overpressure prevention device is selected during the tightness test, and the middle section and the top layer are respectively selected at a G1 pipe orifice and a C pipe orifice;
the method comprises the steps that a tightness detection device is used for conducting subsection tightness testing on a molecular sieve adsorption chamber, in the testing process, a water pipe 2 of an overpressure prevention device is communicated with a sampling port of the molecular sieve adsorption chamber, when the pressure inside the molecular sieve adsorption chamber is too high, water inside the water pipe 2 can move in the water pipe 2 and be used for reducing the pressure inside the molecular sieve adsorption chamber, when the moving amplitude of the water is too high, the water inside the water pipe 2 enters an inner cavity of a containing box 4 through a connecting pipe 5, a main conducting sheet 7 and an auxiliary conducting sheet 8 are submerged, a prompting device 9 is powered on to send a prompt, and the tightness detection device is turned off or turned down in time;
checking the tightness of welding seams: soaking the cleaning cloth in the soap water solution and lightly wiping the cleaning cloth on a welding part to be tested, wherein the steps comprise the inspection of all sealing welding seams for welding a T-shaped sealing plate, a peripheral ring plate and a sealing angle steel ring, the pipeline welding of a distributor, and the test and inspection methods are the same as the above and are not described again;
the seventh step: the process comprises the steps of alternately carrying out NWA-III type 5A molecular sieve loading agent, grid beds and distributor pipeline installation, wherein a hopper is adopted to lift the molecular sieve above a maintenance hole at the top of equipment during loading, a control valve is opened to enter an adsorption chamber bed through a 4' agent loading hose, the adsorbent loading material above each bed of grid is firstly filled with large particles about 100mm high, constructors need to wear geta to step on the materials and flatten the materials by using a scraper, small particles are loaded until the small particles are flush with a T-shaped supporting beam below the grid and cannot exceed the top of the beam, the crushing of the molecular sieve is avoided, the adsorbent loading in an adsorption chamber is large in dust and large in dehydration, the operators need to alternately operate, the ventilation is kept, the personal injury is avoided, 20 barrels of the loading agent are loaded every hour, and the time that the molecular sieve is exposed in the air is reduced as much as possible;
eighth step: the testing of the leakage property of the adsorption chamber and the successful verification of the loading agent are as follows:
before the test of the integral leakage of the adsorption chamber, an upper communicating pipe of a top layer grid and a lower communicating pipe of a bottom layer grid need to be opened, a clean and oilless instrument gas source is connected to a 2' emptying joint of a manhole at the top of the adsorption chamber, a container is pressurized to 0.37kg/cm < 2 >, and when the pressure of a pressure test is reached, no pressure drop and no leakage are qualified within 5 minutes;
and after the leakage property is tested to be qualified, purging the adsorption chamber system, after purging is completed, connecting the test basket to a ball valve discharge port, opening the adsorption chamber again to control the ball valve to release pressure for about 3 minutes, and recovering the top-layer and bottom-layer grid communicating pipes to protect the adsorption chamber by filling nitrogen, wherein no adsorbent is present in the test basket, the adsorbent is proved to be qualified.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. Fischer-Tropsch paraffin chemical industry molecular sieve adsorption chamber dress agent loads with preventing superpressure device, its characterized in that: the method comprises the following steps: a mounting bracket (1);
the water pipe (2) which is arranged in a U shape and filled with water is installed on the front side wall of the installation support (1), one end of the water pipe (2) is communicated with a sampling port of the molecular sieve adsorption chamber, a scale plate (3) which is parallel to the other end of the water pipe (2) is installed on the front side wall of the installation support (1), when the water pipe (2) detects that the internal pressure of the molecular sieve adsorption chamber is too high, the water in the water pipe (2) can move, the communication space between the water pipe (2) and the molecular sieve adsorption chamber is increased, and the communication space is used for reducing the internal pressure of the molecular sieve adsorption chamber;
storage box (4) are installed to installing support (1) outer wall, storage box (4) are through connecting pipe (5) and the inner chamber intercommunication of water pipe (2) the other end.
2. The overpressure prevention device for filling Fischer-Tropsch paraffin chemical molecular sieve adsorption chamber filling agent according to claim 1, characterized in that: a main conducting piece (7) is arranged at the bottom of the inner cavity of the containing box (4), a prompting device (9) electrically connected with the main conducting piece (7) is arranged on the outer wall of the containing box (4),
an auxiliary conducting strip (8) which is arranged above the main conducting strip (7) and is electrically connected with an external power supply is arranged in the inner cavity of the containing box (4).
3. The overpressure preventing device for filling Fischer-Tropsch paraffin chemical molecular sieve adsorption chamber agent according to claim 2, characterized in that: the outer wall of the auxiliary conducting strip (8) is provided with a mounting plate (10), the outer wall of the mounting plate (10) is provided with a moving rod (11) extending to the outer side of the top of the containing box (4),
the top wall of the containing box (4) is provided with a mounting frame (12) which is slidably sleeved on the outer wall of the movable rod (11), and the outer wall of the mounting frame (12) is screwed with a fixing bolt (13) for fixing the movable rod (11).
4. The overpressure preventing device for filling Fischer-Tropsch paraffin chemical molecular sieve adsorption chamber filling agent according to claim 3, characterized in that: one end of the water pipe (2) far away from the molecular sieve adsorption chamber is sleeved with an installation sleeve (6), a movable pressing plate (15) which moves along the length direction of the installation sleeve (6) and performs sealed division on the inner cavity of the installation sleeve (6) is installed in the inner cavity of the installation sleeve (6), an elastic part (14) used for limiting the movable pressing plate (15) to move is installed in the inner cavity of the installation sleeve (6),
the inner cavity of the installation sleeve (6) is internally provided with a touch switch (16) which is positioned above the movable pressing plate (15), and the touch switch (16) is electrically connected with the prompt device (9) and the tightness detection equipment.
5. The overpressure preventing device for filling Fischer-Tropsch paraffin chemical molecular sieve adsorption chamber with the filling agent according to claim 4, characterized in that: the installation cover (6) outer wall is seted up with installation cover (6) inner chamber intercommunication and is in air vent (17) that remove clamp plate (15) top, remove clamp plate (15) outer wall and offer trompil (18) that are used for making air in water pipe (2) to pass, remove clamp plate (15) outer wall and install waterproof ventilated membrane (19) that are used for preventing water pipe (2) normal water to pass trompil (18).
6. A filling method of a Fischer-Tropsch paraffin chemical molecular sieve adsorption chamber filling agent, which utilizes the overpressure prevention device for filling the Fischer-Tropsch paraffin chemical molecular sieve adsorption chamber filling agent of claim 5, and is characterized in that: the method specifically comprises the following steps:
the first step is as follows: erecting a shed, a vertical ladder, a loading and unloading platform, a pre-assembly platform, a discharge hopper, an installation steel grating positioning block, a fixed steel grating clamp, a filling tool, a three-ply board, a switch valve, a blanking hose, a compressor, an induced draft fan, a winch, a portable dust collector and a water pressure gauge;
the second step: inspecting the steel grating components, assembling and numbering according to the installation sequence, and then installing the plywood outside the assembled steel grating;
the third step: carrying out sand blasting treatment on the inner wall of equipment on a molecular sieve adsorption tower, coating antirust oil, and then hoisting a steel grating plate to an installation area of a molecular sieve adsorption chamber for installation to form a grating bed layer;
the fourth step: after the steel grating is fixed, starting to install a distribution pipeline according to a distribution pipe assembly drawing and an actual measurement distance of a flange opening at the top of the on-site grating;
the fifth step: after the piping is finished, filling a ceramic rope in a gap between the cylinder wall and the steel grating, filling the ceramic rope in a cavity at the positions of the thermometer, the sampling valve and the connecting pipe, and compacting the filled ceramic rope;
and a sixth step: the method comprises the steps that a tightness detection device is used for carrying out subsection tightness testing on a molecular sieve adsorption chamber, in the testing process, a water pipe (2) of an overpressure prevention device is communicated with a sampling port of the molecular sieve adsorption chamber, when the pressure in the molecular sieve adsorption chamber is overlarge, water in the water pipe (2) can move in the water pipe (2) and is used for reducing the pressure in the molecular sieve adsorption chamber, when the moving amplitude of the water is overlarge, the water in the water pipe (2) enters an inner cavity of a containing box (4) through a connecting pipe (5), a main conducting piece (7) and an auxiliary conducting piece (8) are submerged, a prompt device (9) is powered on to give out a prompt, the tightness detection device is closed or adjusted to be small in time, after the molecular sieve adsorption chamber is detected, cleaning cloth soaked in soap water is used for wiping in a welding part of the testing, and the tightness of a welding line is detected;
the seventh step: the molecular sieve packing agent, the grid bed layer and the distributor pipeline installation process are alternately carried out, in the molecular sieve packing agent, a hopper is lifted to the position above an overhaul hole at the top of equipment, a control valve is opened, the packing agent enters the bed layer of an adsorption chamber through a packing agent hose, is trampled, and is flattened by a scraper;
eighth step: connecting a clean and oilless instrument gas source to an emptying joint of a manhole at the top of an adsorption chamber, pressurizing a container to a preset value, detecting whether the pressure is reduced or not, if no pressure is reduced, the container is qualified after being subjected to leakage inspection, purging the adsorption chamber, after the adsorption chamber is cleaned, connecting a test basket to a ball valve discharge port, opening the adsorption chamber again to control the ball valve to release pressure, and if no adsorbent appears in the test basket, proving that the adsorbent is qualified, recovering a top layer grating communication pipe and a bottom layer grating communication pipe, and performing nitrogen filling protection on the adsorption chamber.
7. The filling method of the Fischer-Tropsch paraffin chemical molecular sieve adsorbent chamber filling agent according to claim 6, characterized in that: the filling height of the ceramic ropes is more than or equal to the top height of the steel grating.
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