CN112407643B - Low-temperature adsorption device for tank interlayer and working method - Google Patents
Low-temperature adsorption device for tank interlayer and working method Download PDFInfo
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- CN112407643B CN112407643B CN202010920738.5A CN202010920738A CN112407643B CN 112407643 B CN112407643 B CN 112407643B CN 202010920738 A CN202010920738 A CN 202010920738A CN 112407643 B CN112407643 B CN 112407643B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/10—Manholes; Inspection openings; Covers therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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Abstract
The invention discloses a low-temperature adsorption device for a tank interlayer and a working method, wherein the adsorption device comprises an adsorbent filling unit, an adsorbent activating assembly and an adsorbent sealing assembly; the adsorbent filling unit comprises a closed whole formed by welding a manhole cylinder section, a process end socket, a metal sealing plate, a lower connecting flange and an adsorbent filling pipe; the adsorbent activating assembly comprises a heat-preservation heating box, an upper connecting flange, a first pipeline, a second pipeline, an inflation stop valve, a vacuum butterfly valve, a vacuum pump and a nitrogen cylinder; the adsorbent sealing assembly comprises a rupture disk which can be arranged at the upper pipe orifice of the adsorbent filling pipe, a flange which can be arranged on the lower connecting flange, a perforated metal plate which can cover the upper surface of the flange and a fastener which can connect the perforated metal plate, the flange and the lower connecting flange. The invention is a low-temperature adsorption device which integrates the activation function and the low-temperature adsorption function of an adsorbent, and can ensure that the adsorbent plays a high-efficiency role; the vacuum life of the container interlayer can be ensured to reach 5 years by adopting the invention.
Description
Technical Field
The invention belongs to the field of vacuum interlayer treatment of heat-insulating containers, and relates to a low-temperature adsorption device for an interlayer of a tank body and a working method.
Background
Ensuring lasting good vacuum performance is the basic guarantee of normal operation of the high-vacuum multilayer heat-insulating low-temperature container. In the use process of the high-vacuum multilayer heat-insulation low-temperature container, the vacuum degree of the container is inevitably reduced due to the air release of the interlayer material of the container and the air leakage from the external environment to the interlayer; for this reason, the low temperature container is often provided with an adsorption device in the interlayer, and an adsorbent (such as molecular sieve, activated carbon, etc.) placed in the device is used to adsorb gas existing in the interlayer, thereby achieving the purpose of maintaining the vacuum performance of the container. Normally, the adsorbent is expected to work after moisture, impurity gas and the like in the interlayer are removed, so that the adsorbent is prevented from prematurely adsorbing impurities and losing the corresponding effect; in addition, it is desirable that the activated adsorbent be stored in a sealed state so as to minimize contact with the atmosphere, so as not to lose its adsorption effect after adsorbing moisture and gas in the atmosphere.
The existing adsorbent device does not have the function of activating the adsorbent, the adsorbent needs to be activated in special tool equipment, and needs to be placed in a middle storage container after the activation, and then is filled into the adsorbent device from an explosion-proof opening of the shell during filling; the adsorbent is exposed to the atmospheric environment for too long time in the whole process of inversion, storage and filling, and the adsorbent can adsorb a large amount of moisture and micromolecular gas and reduce the adsorption performance of the adsorbent, so that the actual adsorption effect of the adsorbent is greatly reduced due to the existing adsorbent device and the matched using method, and the vacuum maintenance of the low-temperature container is influenced.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a tank interlayer low-temperature adsorption device and a working method thereof, so as to overcome the defects that the existing adsorbent device does not have the function of activating an adsorbent and the matched using method causes poor adsorption performance of the adsorbent.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low-temperature adsorption device for a tank interlayer comprises an adsorbent filling unit, an adsorbent activating assembly and an adsorbent sealing assembly; the adsorbent activating assembly can be matched with the adsorbent filling unit to be installed into an adsorbent activating unit, and the adsorbent sealing assembly can be matched with the adsorbent filling unit to be installed into an adsorbent sealing unit;
the adsorbent filling unit comprises a manhole cylinder section, a process end socket arranged at the bottom of the manhole cylinder section, a metal sealing plate arranged at the upper end of the manhole cylinder section, an adsorbent filling pipe arranged on the metal sealing plate and penetrating through the metal sealing plate, and a lower connecting flange arranged at the upper end of the adsorbent filling pipe; the manhole cylinder section, the process end socket and the metal sealing plate form a closed cavity for placing an adsorbent;
the adsorbent activating assembly comprises a heat-preservation heating box, an upper connecting flange, a first pipeline, a second pipeline, an inflation stop valve, a vacuum butterfly valve, a vacuum pump and a nitrogen cylinder; the adsorbent filling unit can be placed in the heat-preservation heating box, and the upper part of the adsorbent filling pipe and the lower connecting flange can extend out of the top of the heat-preservation heating box; the first pipeline is connected between the vacuum pump and the nitrogen cylinder; one end of the second pipeline is communicated with the first pipeline, the other end of the second pipeline is provided with the upper connecting flange, and the second pipeline is correspondingly communicated with the adsorbent filling pipe in a sealing way through the upper connecting flange, the lower connecting flange and the sealing gasket between the upper connecting flange and the lower connecting flange; the inflation stop valve is arranged on a first pipeline between the second pipeline and the nitrogen cylinder, and the vacuum butterfly valve is arranged on a first pipeline between the second pipeline and the vacuum pump;
the adsorbent sealing assembly comprises a rupture disc which can be arranged at the upper pipe orifice of the adsorbent filling pipe, a flange plate which can be arranged on the lower connecting flange, a perforated metal plate which can cover the upper surface of the flange plate, a sealing gasket which is arranged between the flange plate and the perforated metal plate and a fastener which can connect the perforated metal plate, the flange plate, the sealing gasket and the lower connecting flange; and the activated adsorbent is sealed and stored by a closed cavity formed by the flange plate, the sealing gasket, the rupture disk, the lower connecting flange, the adsorbent filling pipe, the manhole cylinder section, the process end socket and the metal sealing plate.
The invention also comprises the following technical characteristics:
specifically, a mounting hole is formed in the inner layer of the tank body, a manhole flange is arranged on the mounting hole, and the manhole flange and the edge of the upper end of the manhole shell ring are welded into a whole.
Specifically, the manhole cylinder section, the process end socket, the metal sealing plate, the lower connecting flange and the adsorbent filling pipe are welded to form a closed whole.
Specifically, a sealing gasket is arranged between the upper connecting flange and the lower connecting flange to ensure the sealing property of the adsorbent activating assembly;
a sealing gasket is arranged between the flange plate and the lower connecting flange to ensure the sealing property of the adsorbent sealing and storing assembly; the fastener is a bolt and a nut.
A working method of a low-temperature adsorption device for a tank interlayer adopts the adsorption device to perform adsorbent filling, adsorbent activation treatment, adsorbent sealed storage and vacuum adsorption work of the adsorbent device; the method comprises the following steps:
step one, filling an adsorbent, namely filling the adsorbent which is not subjected to activation treatment into a closed cavity of an adsorbent filling unit from an adsorbent filling pipe;
step two, activating the adsorbent, namely installing an adsorbent activation assembly and an adsorbent filling unit in a matching manner to form an adsorbent activation unit, and activating the adsorbent by using the adsorbent activation unit, wherein the method comprises the following steps:
step 2.1, placing the adsorbent filling unit into a heat-preservation heating box, correspondingly installing an upper connecting flange and a lower connecting flange to enable a second pipeline to be communicated with an adsorbent filling pipe in a sealing mode, connecting and installing an adsorbent activating assembly, and enabling a vacuum butterfly valve and an inflation stop valve to be in a closed state;
step 2.2, adjusting the temperature of the heat preservation heating box to 350 ℃, preserving heat at 350 ℃ for 20 hours, starting a vacuum pump, and opening a vacuum butterfly valve to vacuumize the inside of the closed cavity;
step 2.3, when the vacuum degree reaches below 15Pa, closing a vacuum butterfly valve to stop vacuumizing, opening an inflation stop valve, filling high-purity nitrogen of 0.2Mpa into the sealed cavity by using a nitrogen bottle, starting a heat-preservation heating box to continue heating, and heating and preserving the heat at the temperature of 350 ℃;
step 2.4, after heating for 30 minutes, starting a vacuum pump, and opening a vacuum butterfly valve to vacuumize the inside of the closed cavity;
step 2.5, repeating steps 2.3 and 2.4, 4 to 5 times;
step 2.6, stopping heating, closing the vacuum butterfly valve to stop vacuumizing after the temperature is reduced to room temperature, opening the inflation stop valve, and inflating the sealed cavity to atmospheric pressure by using a nitrogen bottle;
step three, sealing and storing the protective adsorbent, separating the lower connecting flange from the upper connecting flange after the activation of the adsorbent is finished, and taking the adsorbent filling unit out of the heat-preservation heating box; the adsorbent packing unit is connected with the rupture disk, the sealing gasket, the flange plate and the metal plate with holes of the adsorbent sealing assembly through bolts and nuts to form an adsorbent sealing unit which is used for sealing and storing the activated adsorbent;
step four, connecting the adsorbent sealing unit and a manhole flange welded on the inner layer of the tank body into a whole in a welding mode; before the interlayer of the tank body is not heated and vacuumized, the adsorbent in the adsorbent sealing and storing unit is sealed and stored in an activated state all the time;
step five, removing water and impurity gases from the interlayer of the tank body according to the processes of heating, vacuumizing and flushing with nitrogen; in the process, the vacuum degree of the interlayer is controlled to be not higher than 0.05MPa, so that premature explosion of the rupture disk due to overpressure is prevented; after water and impurity gases existing in the interlayer of the tank body are basically removed, fine vacuum pumping is started, and when the vacuum degree of the interlayer of the tank body is higher than 0.02MPa, the internal and external pressure difference of the rupture disk reaches the rupture pressure of the rupture disk, so that the rupture disk is cracked and damaged; at the moment, the adsorbent in the closed cavity is communicated with the interlayer of the tank body and is used for adsorbing gas entering the interlayer of the tank body after the tank body works normally so as to maintain the vacuum life of the tank body.
Specifically, in the first step, the adsorbent without being activated is filled into an adsorbent filling unit formed by welding a manhole cylinder section, a process end socket, a metal sealing plate, an adsorbent filling pipe and a lower connecting flange through an adsorbent filling pipe.
Specifically, in the second step, an adsorbent activating unit composed of an adsorbent filling unit, a vacuum pump, a nitrogen cylinder, a heating and heat preserving box, a vacuum butterfly valve and a connecting pipeline is used for activating the adsorbent.
Specifically, in the third step, the adsorbent filling unit, the rupture disk, the sealing gasket, the flange plate and the perforated metal plate are connected into a whole through the bolt and the nut to hermetically store the activated adsorbent.
Specifically, in the fourth step, the adsorbent sealing unit and the manhole flange welded on the inner layer of the tank body are connected into a whole in a welding mode, and the step includes welding the manhole flange and the edge of the upper end of the manhole cylinder section into a whole and keeping the opening of the adsorbent filling pipe facing the interlayer of the tank body.
In the fifth step, by utilizing the special structural design of the adsorbent sealing unit and formulating and implementing a reasonable tank body interlayer vacuumizing process, the rupture disk of the adsorbent sealing unit can be effectively controlled to rupture under the set requirement, so that the adsorbent starts to work at the optimal time and state.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention provides a low-temperature adsorption device integrating an adsorbent activation function and a low-temperature adsorption function, which can ensure that an adsorbent plays a high-efficiency role. The vacuum life of the container interlayer can be ensured to reach 5 years by adopting the invention.
Drawings
FIG. 1 is a schematic diagram of the adsorbent packing unit of the present invention;
FIG. 2 is a schematic diagram of the structure of an adsorbent activation unit according to the present invention;
FIG. 3(a) is a schematic structural view of an adsorbent sequestration unit in accordance with the present invention; (b) a partial enlarged view;
FIG. 4 is a schematic view of the adsorbent containment unit of the present invention installed on the inner layer of the tank;
the reference numerals have the meanings given below:
100. the method comprises the following steps of (1) adsorbing agent, 101, a manhole shell ring, 102, a process end socket, 103, a metal sealing plate, 104, an adsorbing agent filling pipe and 105, a lower connecting flange;
201. 202, an upper connecting flange, 203, a first pipeline, 204, a second pipeline, 205, an inflation stop valve, 206, a vacuum butterfly valve, 207, a vacuum pump, 208, a nitrogen cylinder and 209, a sealing gasket;
301. a rupture disk, 302, a flange plate, 303, a perforated metal plate;
401. inner tank layer 402 manhole flange 403 tank interlayer 404 tank outer layer.
The invention is described in detail below with reference to the drawings and the detailed description.
Detailed Description
The present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention fall within the protection scope of the present invention. The present invention will be described in further detail with reference to examples.
Example 1:
the embodiment provides a low-temperature adsorption device with a tank interlayer, which comprises an adsorbent filling unit, an adsorbent activating assembly and an adsorbent sealing assembly; the adsorbent activating assembly can be matched with the adsorbent filling unit to be installed into an adsorbent activating unit, and the adsorbent sealing assembly can be matched with the adsorbent filling unit to be installed into an adsorbent sealing unit.
As shown in fig. 1, the adsorbent filling unit comprises a manhole cylindrical shell 101, a process head 102 arranged at the bottom of the manhole cylindrical shell 101, a metal sealing plate 103 arranged at the upper end of the manhole cylindrical shell 101, an adsorbent filling pipe 104 arranged on the metal sealing plate 103 and penetrating through the metal sealing plate 103, and a lower connecting flange 105 arranged at the upper end of the adsorbent filling pipe 104; the manhole shell 101, the process head 102 and the metal sealing plate 103 enclose a closed cavity for placing the adsorbent 100.
The adsorbent activating assembly comprises a heat-preservation heating box 201, an upper connecting flange 202, a first pipeline 203, a second pipeline 204, an air charging stop valve 205, a vacuum butterfly valve 206, a vacuum pump 207 and a nitrogen cylinder 208; the adsorbent filling unit can be placed in the heat preservation heating box 201, and the upper part of the adsorbent filling pipe 104 and the lower connecting flange 105 can extend out of the top of the heat preservation heating box 201; a first pipeline 203 is connected between the vacuum pump 207 and the nitrogen gas cylinder 208; one end of the second pipeline 204 is communicated with the first pipeline 203, the other end is provided with an upper connecting flange 202, and the second pipeline 204 is correspondingly communicated with the adsorbent filling pipe 104 in a sealing way through the upper connecting flange 202, the lower connecting flange 105 and a sealing gasket 209 between the upper connecting flange 202 and the lower connecting flange 105; a gas charging shutoff valve 205 is provided on the first pipe 203 between the second pipe 204 and the nitrogen gas cylinder 208, and a vacuum butterfly valve 206 is provided on the first pipe 203 between the second pipe 204 and the vacuum pump 207. The sorbent activation assembly can be installed in cooperation with the sorbent packing unit as a sorbent activation unit, as shown in fig. 2.
The adsorbent sealing assembly comprises a rupture disc 301 which can be arranged at the upper pipe orifice of the adsorbent filling pipe 104, a flange 302 which can be arranged on the lower connecting flange 105, a perforated metal plate 303 which can cover the upper surface of the flange 302, a sealing element arranged between the flange 302 and the perforated metal plate 303 and a fastening element which can connect the perforated metal plate 303, the flange 302, a sealing gasket and the lower connecting flange 105; the activated adsorbent is sealed and stored by a closed cavity formed by the flange 302, the sealing gasket 209, the rupture disk 301, the lower connecting flange 105, the adsorbent filling pipe 104, the manhole shell ring 101, the process end enclosure 102 and the metal sealing plate 103, and the adsorbent sealing assembly can be matched with an adsorbent filling unit to be installed into an adsorbent sealing unit, as shown in fig. 3.
After the rupture disk 301 is punctured, the perforated metal plate 303 can prevent adsorbent particles in the sealed cavity from leaking into the tank body interlayer 403 from the sealed cavity, and the adsorbent particles cannot be removed during normal operation.
An installation port is arranged on the inner layer 401 of the tank body, a manhole flange 402 is arranged on the installation port, and the manhole flange 402 is welded with the upper end edge of the manhole shell ring 101 into a whole.
The manhole shell section 101, the process head 102, the metal sealing plate 103, the lower connecting flange 105 and the adsorbent filling pipe 104 are welded to form a sealed whole.
The gasket 209 between the upper connecting flange 202 and the lower connecting flange 105 ensures the sealing of the sorbent activation assembly; the gasket 209 between the flange 302 and the lower attachment flange 105 ensures the hermeticity of the sorbent containment assembly; the fastener is a bolt and a nut.
Example 2:
this embodiment provides a can body, which includes a can body inner layer 401, a can body interlayer 403, and a can body outer layer 404, and further includes the can body interlayer low-temperature adsorption apparatus in embodiment 1;
an installation port is arranged on the inner layer 401 of the tank body, a manhole flange 402 is arranged on the installation port, the manhole flange 402 is welded with the upper end edge of the manhole shell ring 101 into a whole, and the opening of the adsorbent filling pipe 104 faces the tank body interlayer 403.
Example 3:
the embodiment provides a working method of a low-temperature adsorption device with a tank interlayer, the working method adopts the adsorption device in the embodiment 1 to perform the operations of adsorbent filling, adsorbent activating treatment and adsorbent sealing storage, and the adsorption device in the embodiment 2 performs the operation of vacuum adsorption; the method comprises the following steps:
step one, filling an adsorbent, namely filling the adsorbent which is not subjected to activation treatment into a closed cavity of an adsorbent filling unit from an adsorbent filling pipe;
step two, activating the adsorbent, namely installing an adsorbent activation assembly and an adsorbent filling unit in a matching manner to form an adsorbent activation unit, and activating the adsorbent by using the adsorbent activation unit, wherein the method comprises the following steps:
step 2.1, placing the adsorbent filling unit into a heat-preservation heating box, correspondingly installing an upper connecting flange and a lower connecting flange to enable a second pipeline to be communicated with an adsorbent filling pipe in a sealing mode, connecting and installing an adsorbent activating assembly, and enabling a vacuum butterfly valve and an inflation stop valve to be in a closed state;
step 2.2, adjusting the temperature of the heat preservation heating box to 350 ℃, preserving heat at 350 ℃ for 20 hours, starting a vacuum pump, and opening a vacuum butterfly valve to vacuumize the inside of the closed cavity;
step 2.3, when the vacuum degree reaches below 15Pa, closing a vacuum butterfly valve to stop vacuumizing, opening an inflation stop valve, filling high-purity nitrogen of 0.2Mpa into the sealed cavity by using a nitrogen bottle, starting a heat-preservation heating box to continue heating, and heating and preserving the heat at the temperature of 350 ℃;
step 2.4, after heating for 30 minutes, starting a vacuum pump, and opening a vacuum butterfly valve to vacuumize the inside of the closed cavity;
step 2.5, repeating steps 2.3 and 2.4, 4 to 5 times;
step 2.6, stopping heating, closing the vacuum butterfly valve to stop vacuumizing after the temperature is reduced to room temperature, opening the inflation stop valve, and inflating the sealed cavity to atmospheric pressure by using a nitrogen bottle;
step three, sealing and storing the protective adsorbent, separating the lower connecting flange from the upper connecting flange after the activation of the adsorbent is finished, and taking the adsorbent filling unit out of the heat-preservation heating box; the adsorbent packing unit is connected with the rupture disk, the sealing gasket, the flange plate and the metal plate with holes of the adsorbent sealing assembly through bolts and nuts to form an adsorbent sealing unit which is used for sealing and storing the activated adsorbent;
step four, connecting the adsorbent sealing unit and a manhole flange welded on the inner layer of the tank body into a whole in a welding mode; before the interlayer of the tank body is not heated and vacuumized, the adsorbent in the adsorbent sealing and storing unit is sealed and stored in an activated state all the time;
step five, removing water and impurity gases from the interlayer of the tank body according to the processes of heating, vacuumizing and flushing with nitrogen; in the process, the vacuum degree of the interlayer is controlled to be not higher than 0.05MPa, so that premature explosion of the rupture disk due to overpressure is prevented; after water and impurity gases existing in the interlayer of the tank body are basically removed, fine vacuum pumping is started, and when the vacuum degree of the interlayer of the tank body is higher than 0.02MPa, the internal and external pressure difference of the rupture disk reaches the rupture pressure of the rupture disk, so that the rupture disk is cracked and damaged; at the moment, the adsorbent in the closed cavity is communicated with the interlayer of the tank body and is used for adsorbing gas entering the interlayer of the tank body after the tank body works normally so as to maintain the vacuum life of the tank body.
In the first step, the adsorbent without activation treatment is filled into an adsorbent filling unit formed by welding a manhole cylinder section, a process end socket, a metal sealing plate, an adsorbent filling pipe and a lower connecting flange through an adsorbent filling pipe.
And step two, activating the adsorbent by using an adsorbent activating unit consisting of an adsorbent filling unit, a vacuum pump, a nitrogen cylinder, a heating and heat preserving box, a vacuum butterfly valve and a connecting pipeline.
And in the third step, the adsorbent filling unit, the rupture disk, the sealing gasket, the flange plate and the perforated metal plate are connected into a whole through bolts and nuts to carry out sealed storage on the activated adsorbent.
And in the fourth step, the adsorbent sealing unit and a manhole flange welded on the inner layer of the tank body are connected into a whole in a welding mode, the manhole flange and the edge of the upper end of the manhole cylinder section are welded into a whole, and the opening of the adsorbent filling pipe is kept to face the interlayer of the tank body.
And step five, by utilizing the special structural design of the adsorbent sealing unit and formulating and implementing a reasonable tank body interlayer vacuumizing process, the rupture disk of the adsorbent sealing unit can be effectively controlled to rupture under a set requirement, so that the adsorbent starts to work at the optimal time and state.
Claims (10)
1. The low-temperature adsorption device for the tank interlayer is characterized by comprising an adsorbent filling unit, an adsorbent activating assembly and an adsorbent sealing assembly; the adsorbent activating assembly can be matched with the adsorbent filling unit to be installed into an adsorbent activating unit, and the adsorbent sealing assembly can be matched with the adsorbent filling unit to be installed into an adsorbent sealing unit;
the adsorbent filling unit comprises a manhole cylinder section (101), a process end socket (102) arranged at the bottom of the manhole cylinder section (101), a metal sealing plate (103) arranged at the upper end of the manhole cylinder section (101), an adsorbent filling pipe (104) arranged on the metal sealing plate (103) and penetrating through the metal sealing plate (103), and a lower connecting flange (105) arranged at the upper end of the adsorbent filling pipe (104); the manhole cylinder section (101), the process end socket (102) and the metal sealing plate (103) enclose a closed cavity to place the adsorbent (100);
the adsorbent activating assembly comprises a heat-preservation heating box (201), an upper connecting flange (202), a first pipeline (203), a second pipeline (204), an inflation stop valve (205), a vacuum butterfly valve (206), a vacuum pump (207) and a nitrogen cylinder (208); the adsorbent filling unit can be placed in the heat preservation heating box (201), and the upper part of the adsorbent filling pipe (104) and the lower connecting flange (105) can extend out of the top of the heat preservation heating box (201); the first pipeline (203) is connected between the vacuum pump (207) and the nitrogen gas cylinder (208); one end of the second pipeline (204) is communicated with the first pipeline (203), the other end of the second pipeline is provided with the upper connecting flange (202), and the second pipeline (204) is correspondingly communicated with the adsorbent filling pipe (104) in a sealing way through the upper connecting flange (202), the lower connecting flange (105) and a sealing gasket (209) between the upper connecting flange and the lower connecting flange; the gas charging stop valve (205) is arranged on the first pipeline (203) between the second pipeline (204) and the nitrogen cylinder (208), and the vacuum butterfly valve (206) is arranged on the first pipeline (203) between the second pipeline (204) and the vacuum pump (207);
the adsorbent sealing and storing assembly comprises a rupture disc (301) which can be arranged at an upper pipe orifice of an adsorbent filling pipe (104), a flange plate (302) which can be arranged on a lower connecting flange (105), a perforated metal plate (303) which can cover the upper surface of the flange plate (302), a sealing element arranged between the flange plate (302) and the perforated metal plate (303) and a fastening piece which can connect the perforated metal plate (303), the flange plate (302), a sealing gasket (209) and the lower connecting flange (105); and a closed cavity formed by the flange plate (302), the sealing gasket (209), the rupture disk (301), the lower connecting flange (105), the adsorbent filling pipe (104), the manhole cylinder section (101), the process end socket (102) and the metal sealing plate (103) is used for sealing and storing the activated adsorbent.
2. The tank interlayer cryosorption device according to claim 1, wherein a mounting opening is provided on the tank inner layer (401), a manhole flange (402) is provided on the mounting opening, and the manhole flange (402) is welded to the upper end edge of the manhole shell ring (101) as a whole.
3. The tank interlayer cryogenic adsorption device according to claim 2, wherein the manhole shell (101), the process head (102), the metal sealing plate (103), the lower connecting flange (105) and the adsorbent filling pipe (104) are welded to form a sealed whole.
4. The tank sandwich cryosorption device according to claim 2, wherein a gasket (209) between the upper connecting flange (202) and the lower connecting flange (105) ensures the tightness of the sorbent activation module;
a sealing gasket (209) between the flange plate (302) and the lower connecting flange (105) can ensure the sealing performance of the adsorbent sealing assembly; the fastener is a bolt and a nut.
5. A working method of a low-temperature adsorption device with a tank interlayer is characterized in that the working method adopts the adsorption device of any one of claims 3 to 4 to carry out adsorbent filling, adsorbent activation treatment, adsorbent sealed storage and vacuum adsorption of the adsorbent device; the method comprises the following steps:
step one, filling an adsorbent, namely filling the adsorbent which is not subjected to activation treatment into a closed cavity of an adsorbent filling unit from an adsorbent filling pipe;
step two, activating the adsorbent, namely installing an adsorbent activation assembly and an adsorbent filling unit in a matching manner to form an adsorbent activation unit, and activating the adsorbent by using the adsorbent activation unit, wherein the method comprises the following steps:
step 2.1, placing the adsorbent filling unit into a heat-preservation heating box, correspondingly installing an upper connecting flange and a lower connecting flange to enable a second pipeline to be communicated with an adsorbent filling pipe in a sealing mode, connecting and installing an adsorbent activating assembly, and enabling a vacuum butterfly valve and an inflation stop valve to be in a closed state;
step 2.2, adjusting the temperature of the heat preservation heating box to 350 ℃, preserving heat at 350 ℃ for 20 hours, starting a vacuum pump, and opening a vacuum butterfly valve to vacuumize the inside of the closed cavity;
step 2.3, when the vacuum degree reaches below 15Pa, closing a vacuum butterfly valve to stop vacuumizing, opening an inflation stop valve, filling high-purity nitrogen of 0.2Mpa into the sealed cavity by using a nitrogen bottle, starting a heat-preservation heating box to continue heating, and heating and preserving the heat at the temperature of 350 ℃;
step 2.4, after heating for 30 minutes, starting a vacuum pump, and opening a vacuum butterfly valve to vacuumize the inside of the closed cavity;
step 2.5, repeating steps 2.3 and 2.4, 4 to 5 times;
step 2.6, stopping heating, closing the vacuum butterfly valve to stop vacuumizing after the temperature is reduced to room temperature, opening the inflation stop valve, and inflating the sealed cavity to atmospheric pressure by using a nitrogen bottle;
step three, sealing and storing the protective adsorbent, separating the lower connecting flange from the upper connecting flange after the activation of the adsorbent is finished, and taking the adsorbent filling unit out of the heat-preservation heating box; the adsorbent packing unit is connected with the rupture disk, the sealing gasket, the flange plate and the metal plate with holes of the adsorbent sealing assembly through bolts and nuts to form an adsorbent sealing unit which is used for sealing and storing the activated adsorbent;
step four, connecting the adsorbent sealing unit and a manhole flange welded on the inner layer of the tank body into a whole in a welding mode; before the interlayer of the tank body is not heated and vacuumized, the adsorbent in the adsorbent sealing and storing unit is sealed and stored in an activated state all the time;
step five, removing water and impurity gases from the interlayer of the tank body according to the processes of heating, vacuumizing and flushing with nitrogen; in the process, the vacuum degree of the interlayer is controlled to be not higher than 0.05MPa, so that premature explosion of the rupture disk due to overpressure is prevented; after water and impurity gases existing in the interlayer of the tank body are basically removed, fine vacuum pumping is started, and when the vacuum degree of the interlayer of the tank body is higher than 0.02MPa, the internal and external pressure difference of the rupture disk reaches the rupture pressure of the rupture disk, so that the rupture disk is cracked and damaged; at the moment, the adsorbent in the closed cavity is communicated with the interlayer of the tank body and is used for adsorbing gas entering the interlayer of the tank body after the tank body works normally so as to maintain the vacuum life of the tank body.
6. The method for operating the low-temperature adsorption device with the interlayer of the tank body as claimed in claim 5, wherein in the first step, the adsorbent without being activated is filled into an adsorbent filling unit formed by welding a manhole shell ring, a process end socket, a metal sealing plate, an adsorbent filling pipe and a lower connecting flange through an adsorbent filling pipe.
7. The method according to claim 5, wherein in the second step, the adsorbent is activated by an adsorbent activating unit comprising an adsorbent filling unit, a vacuum pump, a nitrogen cylinder, a heating and insulating tank, a vacuum butterfly valve, and a connecting pipe.
8. The working method of the low-temperature adsorption device with the tank interlayer as claimed in claim 5, wherein in the third step, the adsorbent filling unit, the rupture disk, the sealing gasket, the flange plate and the metal plate with the holes are connected into a whole through bolts and nuts to carry out sealed storage on the activated adsorbent.
9. The method for operating the low temperature adsorption device with the tank interlayer as claimed in claim 5, wherein the fourth step of connecting the adsorbent sealing unit and the manhole flange welded on the inner layer of the tank body into a whole by welding comprises welding the manhole flange and the upper end edge of the manhole shell section into a whole, and keeping the opening of the adsorbent filling pipe facing the tank interlayer.
10. The working method of the low-temperature adsorption device with the tank interlayer as claimed in claim 5, wherein in the fifth step, the rupture disk of the adsorbent sealing unit can be effectively controlled to rupture under the set requirement by utilizing the special structural design of the adsorbent sealing unit and formulating and implementing a reasonable tank interlayer vacuumizing process, so that the adsorbent starts to work at the optimal time and state.
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