CN114688455B

CN114688455B - Spherical storage tank with uniform stress on shell

Info

Publication number: CN114688455B
Application number: CN202210603706.1A
Authority: CN
Inventors: 吴建国; 张龙飞; 华禹; 李东旭
Original assignee: SHENYANG INDUSTRIAL INSTALLATION ENGINEERING CO LTD
Current assignee: SHENYANG INDUSTRIAL INSTALLATION ENGINEERING CO LTD
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2023-10-31
Anticipated expiration: 2042-05-31
Also published as: CN114688455A

Abstract

The invention relates to a spherical storage tank with uniform stress on a shell, which belongs to the technical field of dangerous liquefied medium storage tanks, and comprises a support assembly and a spherical tank body, and is technically characterized in that: the supporting component comprises a support column fixed on a foundation, a base beam fixed on the foundation and arranged in a polygonal shape, an inclined beam and a cross beam which are matched with the support column to form a triangular structure, and connecting columns embedded in the support column and matched with the upper end of the inclined beam at two ends in a diameter-reduced mode, wherein the inclined beam and the cross beam are matched with the support column through a first connecting end and a second connecting end which are arranged at the tail ends of the inclined beam and the cross beam respectively. The wind-resistant steel plate has the advantages of simple and compact structure, corrosion resistance, stable and reliable structure, easiness in construction, good wind resistance and the like.

Description

Spherical storage tank with uniform stress on shell

Technical Field

The invention relates to the technical field of dangerous liquefied medium storage tanks, in particular to a spherical storage tank with a uniform stress shell.

Background

Natural gas is a mixed gas of light hydrocarbon organic substances (methane, ethane and propane) as main components, has the characteristics of no color, no smell, no toxicity, no corrosiveness and the like, can be liquefied at the temperature of about normal pressure to 162 ℃, and has the volume of about 1/625 of the gaseous volume. The transportation modes mainly comprise three transportation modes, namely pipeline transportation, road transportation and marine transportation.

Among them, for less than 1000km, the required traffic is small, and it is apparent that the choice of road transport is more suitable. Tank cars equipped with storage tanks are typically used to transport lng after cryogenic cooling. In international commodity trade, energy transactions mainly based on crude oil and natural gas are normalized. In transoceanic trade, transport vessels are mainly used as carriers. Natural gas, unlike crude oil, requires the use of dedicated transport vessels for transoceanic transport. The double-layer shell structure is generally designed, the interlayer is filled with inert gas, and an explosion-proof monitoring system is arranged.

The conveying pipeline is generally paved between a mining place or a treatment plant and a city gas distribution center or between city gas distribution centers and mainly comprises a gas conveying pipe section, a first station, a pressure station, an intermediate gas receiving station, an intermediate gas sub-conveying station, a last station, a pipe cleaning station, a main line management room and the like. In order to avoid the problem of liquefied natural gas heated and gasified, a booster pump station and a cooling station are also required to be built along the pipeline. In addition, it is also necessary to monitor the tightness of the pipeline to avoid safety accidents. Although the cost of laying and maintenance is high, the efficiency of pipeline transportation is highest compared with other transportation modes.

For natural gas clean-up, the natural gas debenzolization and heavy hydrocarbon process may employ molecular sieves and be regenerated using Boil Off Gas (BOG). The natural gas mercury removal process can adopt an HgSIV molecular sieve adsorption method and a sulfur leaching active carbon adsorption method. The natural gas desulfurization process may employ Methyldiethanolamine (MDEA), which has a wide range of adaptations for different natural gas compositions.

The natural gas dehydration method mainly comprises four steps: freeze separation, solvent absorption, solid desiccant adsorption, and chemical reaction. The triethylene glycol (TEG) dehydration method is widely applied to the control of the dew point of natural gas water by virtue of the advantages of mature and reliable process, simple flow, low energy consumption, low initial investment and low operation and maintenance cost. The dehydration process still requires passing the wet natural gas through a filter separator to remove free water and then achieving complete dehydration by convection of the wet natural gas with the TEG in an absorber column. Although this solution solves the problem of TEG regeneration, it is obvious that when the molecular sieve material in the filter separator gradually tends to saturate, it has to be stopped for replacement, and the working efficiency is still limited in practical application. Which can only be used to reduce the frequency of replacement by increasing the volume of the filter separator. In addition, since the molecular sieve particles in the filter separator are not uniformly dispersed according to the saturation condition of the particles, incomplete dehydration may still be caused when the gas selectively passes through.

The spherical tank is a large spherical pressure container commonly used in the chemical industry field and is widely used for storing various gases, liquefied petroleum gas, liquefied natural gas, liquid hydrocarbon, liquid ammonia, liquid nitrogen, liquid oxygen, liquid hydrogen and the like. Compared with a cylindrical pressure vessel, the pressure vessel mainly comprises the following characteristics: in order to save materials and facilitate manufacturing, low-alloy high-strength steel with higher strength level is often adopted to reduce the wall thickness as much as possible, but the weldability of the steel is generally poor, so reliable welding technological measures are needed; the ball valve is formed by assembling a plurality of ball valves, and the assembly dimensional accuracy is required to be strictly ensured so as to prevent excessive additional stress from being generated at local parts of the ball shell. The spherical tank mainly comprises a spherical tank body and a supporting column, wherein the spherical tank body is a main component for bearing the pressure of materials, and the supporting column is a component for supporting the total weight of the spherical tank body and the materials. Thus, the stability of the support column is particularly critical when constructing spherical tanks. However, with the rapid development of petrochemical industry, the requirement on the volume of the tank body is also increasing. With the increase of the diameter of the tank body, the mechanical property of the tank body is also changed continuously, and when the diameter of the tank body reaches more than 15m, the stability of the tank body is affected due to the larger sectional area of the tank body. In addition, because of the large liquid inlet and liquid outlet of the spherical tank, when the liquid in the tank is discharged, a huge pressure drop effect is formed due to the large volume of the liquid, and rotational flow is formed in the tank body, so that the gravity center of the liquid in the tank is continuously changed, and the problem of the tank body is further affected.

Disclosure of Invention

The invention aims to provide a natural gas storage tank, which fundamentally solves the problems, and has the advantages of simple and compact structure, corrosion resistance, stable and reliable structure, easy construction, good wind resistance and the like.

In order to achieve the above purpose, the present invention provides the following technical solutions: this spherical storage tank of even casing atress, including supporting component, spherical jar body, its technical essential is: the support assembly comprises a support column fixed on a foundation, a base beam fixed on the foundation and arranged in a polygonal shape, an inclined beam and a cross beam which are matched with the support column to form a triangular structure, and connecting columns which are embedded in the support column and are matched with the upper end parts of the inclined beam in a way that the two ends of the inclined beam are reduced in diameter, wherein the inclined beam and the cross beam are respectively matched with the support column through a first connecting end and a second connecting end which are arranged at the tail ends of the inclined beam and the cross beam;

the first connecting end and the second connecting end comprise a first arc-shaped part and a second arc-shaped part which are symmetrically hooped on the support column through bolts; a base gasket is arranged between the second connecting end and the foundation, and a base Liang Dianpian is arranged between the oblique beam and the base beam.

Further, the base pad and/or the base Liang Dianpian are resilient pads.

Further, set up oblique lacing wire subassembly between the adjacent pillar or the spliced pole, oblique lacing wire subassembly includes through the articulated a pair of intercrossing's of engaging lug oblique lacing wire, through arc wall or opening spacing between oblique lacing wire and first connecting piece and the second connecting piece of mutually supporting.

Further, the spherical tank body comprises a top opening, an outer wall assembly and a bottom opening, and connecting grooves which correspond to the connecting columns in number and are matched with each other are formed in the outer wall assembly.

Further, the circulation assembly comprises a plurality of guide ring layers which are arranged from inside to outside, the height of the guide ring layers is gradually reduced, the rotational flow directions of the adjacent ring layers are opposite, the guide plates of the guide ring layers at the outermost end are gradually reduced along the rotational flow directions.

Furthermore, the bottom of each guide plate is provided with guide grooves and connecting ends at intervals.

Further, the outer wall component is wrapped by an isolating layer formed by a plurality of isolating strips arranged layer by layer, and the isolating strips are provided with openings matched with the curvature of the spherical shell wall plate of the spherical tank body.

Further, a plurality of traction protrusions are arranged on the outer wall assembly in a staggered mode layer by layer along the circumferential direction of the outer wall, a limiting steel cable is arranged on each traction protrusion, and two tail ends of the steel cable are matched through anchoring pieces to form a closed-loop structure.

The invention has the advantages and beneficial effects that: in the whole technical scheme, a feeding pipeline serving as a raw material supply side, a spherical tank device or a cylindrical tank device serving as a receiving terminal, a filtering separator filled with molecular sieve, a pressure regulating device for regeneration circulation, a pressure supplementing pipeline and a pressure releasing pipeline for regeneration circulation and a plurality of three-way valves for selectively connecting the filtering separator are adopted. Under the control of the three-way valve, the raw natural gas in the raw material pipeline enters the filtering separator in an alternative mode, and enters the natural gas storage tank after dehydration. The dehydration and filtration cycle is carried out from bottom to top, the regeneration cycle is carried out from top to bottom, the residual particle impurities on the original filter screen can be reversely washed, and the washed impurities are removed by the filter. The other unsaturated (regenerated filter separator) is connected into the dehydration system by controlling the three-way valve, and the saturated filter separator is connected into the regeneration circulation system, so that the dehydrated molecular sieve is replaced without stopping, and the production efficiency is improved.

For the filtering separator, through setting up a plurality of purification devices that have self-distributing function that are close of structure that establish ties each other at the inlet end of storage tank, can be with wet natural gas dehydration completely to get rid of the sulfide, guaranteed the long-term no-stop operation of production line.

For the pressure regulating device, the system temperature is increased by increasing the internal energy through the volume of the compressed gas, the heat exchange process outside the system is not needed, and the energy loss is smaller. Under the drive of the piston of the compression cylinder, when the gas in the compression cylinder expands, the system temperature is reduced, condensed water is separated out and then led out; when the gas in the compression cylinder is compressed, the temperature of the system rises, the system enters a regeneration cycle, and the temperature in the regenerated filter separator is pushed up, so that the water is further carried away from the filter separator, and finally the regeneration of the molecular sieve is realized.

And for the cylinder device, the annular steel bars are pre-buried in the foundation during construction and serve as positioning grooves of the outer tank wall or the inner tank wall, and the foundation is constructed in a pouring mode. The outer tank wall or the inner tank wall adopts precast concrete panels to complete positioning and assembly on a construction site. In order to facilitate the processes of installation of equipment in the storage tank, wire arrangement and the like, a notch is reserved during construction, and the notch of the wall of the inner tank is smaller than the notch of the wall of the outer tank. In order to ensure the structural strength of the storage tank, a cable assembly is arranged between the inner tank wall and the outer tank wall, concrete is poured, and a cable of the cable assembly is fixed outside the inner tank wall through a plurality of anchoring pieces. In order to cooperate with the construction of the opening structure, the cable is divided into a preassembled section and a connecting section which cooperates with the concrete panel at the opening. The preassembling section is clamped and screwed into an anchor ring positioned in the sleeve by utilizing a tooth plate assembly in a cutting mode, and the sleeve is fixed on the wall of the inner tank in a bolt preassembling mode. The pre-tightening of the cable of the pre-installed section can be realized by adjusting the anchor ring, and the assembly of the cable is completed by matching the cable of the connected section.

To spherical tank device, among its supporting component, the sloping contacts with the pillar through first link, and the crossbeam contacts with the pillar through the second link, and the sloping bottom is fixed on the basic roof beam, and triangle-shaped structure is constituteed to pillar, sloping, crossbeam to effectively improve the stability of backup pad.

Further, the base beam forms a polygonal frame structure for supporting load, so that the contact area between the spherical tank device as an integrated structure and a foundation is effectively increased, the spherical tank main body is more uniformly distributed in stress, and the supporting stability is improved. The spherical tank body is supported on the supporting component through the connecting column, the weight of the spherical tank body is transferred downwards, when filling or horizontal load is generated by wind power, the spherical tank body pushes the corresponding connecting column, downward pressure is applied to the inclined beam and the base beam, the downward pressure applied to the base beam is transferred to the whole polygonal frame plane formed by the base beam, and the load is further dispersed by increasing the bearing area of the spherical tank on the foundation, so that the spherical tank device is integrally more stable.

Further, the base gasket or the base beam gasket can be replaced by an elastic gasket, when the elastic gasket is pressed by the inclined beam or the lower pressure of the second connecting end, the elastic gasket is extruded to generate reverse damping, so that the load of the spherical tank main body is counteracted, and after the load disappears, the spherical tank main body is promoted to return to the original position, and finally, the effect of rigid self-adaptive load is realized.

Drawings

Fig. 1 is a schematic diagram of the front view structure of the spherical tank of the present invention.

Fig. 1a is a schematic isometric side view of a spherical tank of the present invention.

FIG. 1b is a schematic view of the fork beam assembly of FIG. 1 a.

FIG. 1c is a schematic structural view of a support assembly for a spherical tank according to the present invention.

Fig. 1d is a schematic structural diagram of the first connection end in fig. 1 c.

Fig. 1e is a schematic structural diagram of the second connection end in fig. 1 c.

FIG. 1f is a schematic view of the structure of the isolation layer of the present invention.

Fig. 1g is a schematic structural layout of a traction assembly of the spherical tank device of the present invention.

Fig. 1h is a schematic structural diagram of a bottom diversion assembly of the spherical tank device of the present invention.

Fig. 2 is a schematic diagram of the air path structure of the present invention.

Fig. 3 is a schematic cross-sectional view of the filter separator of fig. 1.

Fig. 3a is a schematic structural view of the deflector according to the present invention.

Fig. 3b is a schematic structural diagram of another embodiment of fig. 3 a.

Fig. 4 is a schematic structural diagram of the pressure regulating device in fig. 1.

Fig. 5 is a schematic diagram of the natural gas tank of fig. 1.

Fig. 5a is a schematic view of a part of the enlarged structure of the portion a in fig. 5.

Fig. 5b is a schematic view of the explosive structure of the anchor of the present invention.

Reference numerals illustrate:

the filter separator is 1, the upper ceramic ball is 11 filled, the molecular sieve particles are 12, the lower ceramic ball is 13 filled, the bottom tube is 14, the shell is 15, the floating film is 16, the flow guider is 17, the cone top is 171, the cone bottom is 172, the support ribs are 173, the through holes are 174, the support plates are 175, and the top tube is 18;

2 pressure regulating device, 21 intake pipe, 211 first pressure regulating check valve, 212 feed tank, 22 drain pipe, 221 safety valve, 222 pressure sensor, 223 second pressure regulating check valve, 224 drain tank, 23 fluid storage tank, 231 first liquid return pipe, 232 second liquid return pipe, 233 third pressure regulating check valve, 234 fourth pressure regulating check valve, 235 fifth pressure regulating check valve, 236 drain pipe, 24 electric pump, 25 compression cylinder, 251 piston, 252 magnetic sensor;

3 canister devices, 31 foundations, 32 outer canister walls, 33 inner canister walls, 34 cable assemblies, 341 preassembled sections, 342 connection sections, 343 anchors, 3431 anchor rings, 3432 tooth sheet assemblies, 3433 sleeves, 35 canister tops and 36 bottom plates;

4 spherical tank device, 41 foundation, 411 base gasket, 412 base Liang Dianpian, 42 support component, 421 strut, 4211 connecting lug, 422 oblique beam, 4221 first connecting end, 423 cross beam, 4231 second connecting end, 424 base beam, 425 oblique lacing wire component, 4251 first connecting piece, 4252 second connecting piece, 4253 oblique lacing wire, 426 connecting post, 43 spherical tank body, 431 top opening, 432 bottom opening, 433 outer wall component, 4331 connecting slot, 4332 isolation layer, 4332a opening, 4333 spherical shell wallboard, 4334 traction bulge, 4335 steel cable, 44 circulation component, 441 outer guide plate, 4411 guide slot, 4412 connecting end, 442 inner guide plate, 4421 guide plate top;

a filter 5, a pressure supplementing device 6, a raw material pipeline 7 and a gas-liquid separator 8;

a P1 first pressure sensor and a P2 second pressure sensor;

a C1 first one-way valve and a C2 second one-way valve;

a T1 first three-way valve, a T2 second three-way valve, a T3 third three-way valve and a T4 fourth three-way valve;

a V1 first control valve, a V2 second control valve, a V3 third control valve, a V4 fourth control valve and a V5 fifth control valve;

an L1 pressure supplementing pipeline, an L2 pressure releasing pipeline, an L3 discharging pipeline and an L4 feeding pipeline.

Detailed Description

The following describes the structure of the present invention in detail by way of specific embodiments with reference to fig. 1 to 5.

[ spherical tank device ]

As shown in fig. 1 and 1a to 1h, the spherical tank device 4 mainly includes a support member 42 built on a foundation 41, and a spherical tank body 43 supported thereon. The supporting component 42 comprises a pillar 421 fixed on the foundation 41, a base beam 424 fixed on the foundation 41 and arranged in a polygon, an inclined beam 422 and a beam 423 matched with the pillar 421 to form a triangle structure, and a connecting post 426 embedded in the pillar 421 and matched with the upper end of the inclined beam 422, wherein the two ends of the connecting post 426 are reduced in diameter, and the inclined beam 422 and the beam 423 are respectively matched with the pillar 421 through a first connecting end 4221 and a second connecting end 4231 arranged at the tail ends of the inclined beam 422 and the beam 423. The spherical tank 43 is similar to the existing structure, and mainly comprises a top opening 431, an outer wall assembly 433 and a bottom opening 432, wherein the outer wall assembly 433 is provided with connecting grooves 4331 corresponding to the connecting columns 426 in number and matched with each other. The first connection end 4221 and the second connection end 4231 each comprise a first arc portion and a second arc portion symmetrically hooped on the support 421 by bolts. To compensate for the accumulated deformation errors caused by welding, stamping, self-weight extrusion deformation and the like, and keep the upper surfaces of the first connecting ends 4221 on the same horizontal plane as much as possible, a plurality of stacked elastic base gaskets 411 are arranged between the second connecting ends 4231 and the foundation 41, and a plurality of stacked elastic bases Liang Dianpian are arranged between the inclined beams 422 and the base beams 424.

Meanwhile, in order to further improve the integrated stability of the support assembly 42, diagonal lacing wire assemblies 425 are disposed between adjacent struts 421 or connecting struts 426. By providing diagonal lacing wire assemblies 425, each strut 421 can be combined into an integral tubular support to distribute the load from above as much as possible, thereby improving stability. The diagonal lacing wire assembly 425 includes a pair of interdigitated diagonal lacing wires 4253 hinged by means of a connecting lug 4211, and first and second cooperating connecting members 4251, 4252 captured between the diagonal lacing wires 4253 by means of arcuate slots or slits.

The circulation assembly 44 comprises a plurality of diversion ring layers which are arranged from inside to outside, the height of the diversion ring layers is in gradient descent and the rotational flow directions of the adjacent ring layers are opposite, the height of the diversion plates of the diversion ring layer at the outermost end is gradually reduced along the rotational flow direction, and diversion grooves 4411 and connecting ends 4412 are arranged at the bottom of each diversion plate at intervals. The present embodiment is illustrated with a loop assembly 44 having two loop layers.

The circulation assembly 44 includes an outer guide ring layer and an inner guide ring layer disposed from outside to inside, the outer guide ring layer is surrounded by four arc-shaped outer guide plates 441, the bottom of each outer guide plate 441 is provided with guide grooves 4411 and connecting ends 4412 at intervals, each outer guide plate 441 forms a guide structure in a non-closed symmetrical manner, and fluid channels are reserved between adjacent outer guide plates 441 and between the outer guide plates 441 and the inner guide plates 442. And, as seen in the direction of fig. 1h, the flow guide channels formed between the outer flow guide plates 441 of the outer flow guide ring are distributed clockwise, and the flow guide channels formed between the inner flow guide plates 442 are distributed counterclockwise. Through the setting of above-mentioned convection structure for fluid in the spherical tank is when forming the whirl and discharges, gets into the inner circle layer by the water conservancy diversion passageway of outer lane layer, and the energy of its whirl is offset by the reverse whirl part of the water conservancy diversion passageway of reverse arrangement, thereby has avoided the quick accumulation of exit end whirl energy, influences the stability of the jar body.

The spherical tank device 4 of the present embodiment is constructed as follows.

In step S1, the spherical shell assembly 43 is manufactured.

S101, preprocessing a plate, namely performing surface preprocessing on a blank steel, punching the plate by adopting multipoint cold forming to obtain a blank plate with a preset radian, slowly pressing the blank plate to a specified curvature during forming, wherein the curvature is uniform, the superposition rate of each pressing point during punching is not less than 2/3 (the spherical shell plate is formed at the temperature of more than 0 ℃), and checking the curvature of the spherical shell unit by using a specified template (the chord length of the template is more than or equal to 2 m) after punching;

step S102, cutting the woolen, cutting the spherical shell unit groove by adopting a three-nozzle flame cutting machine, after ignition, adjusting cutting flame to enable the cutting flame to reach an ideal stable state meeting the requirements of cutting groove finish, starting cutting, cutting the woolen in the step S101 into a plurality of spindle-shaped spherical shell unit plates with equal size, and polishing along the edges of the spherical shell unit plates to remove the miscellaneous edges;

step S103, carrying out anti-corrosion treatment, namely after degreasing (degreasing powder) and removing rust (locally coating acid) on the surface of the spherical shell unit plate, washing with water, carrying out drying treatment, coating a weldable anti-rust coating within a range of 100mm along a peripheral groove, and coating the rest parts according to requirements, wherein the steel number, the furnace tank number and the furnace batch number (or the spherical shell plate code number) of each spherical shell plate are coated; in addition, the oil removing powder and the acid component are all common knowledge in the field, and can be freely selected by the person skilled in the art according to the cost and the cleaning effect, and are not illustrated herein;

step S104, manufacturing a top opening (flange) 431, a bottom opening (flange) 432, an opening cover (not shown in the figure), a circulation assembly 44, a support assembly 42, a connecting groove 4331 and other components, and adopting a pretreatment method similar to a spherical shell plate for later use;

step S105, welding the top opening 431, the bottom opening 432 and the spherical shell units, welding a preset number of connecting grooves 4331 on the outer walls of the corresponding spherical shell units according to the designed positions, and welding the circulation assembly 44 on the inner walls of the bottom of the spherical shell from inside to outside; the welded spherical shell assembly 43 is heat treated by an electrothermal method, during which the arc plate is continuously struck to prevent deformation.

And S2, building a base.

Step S201, surveying the surrounding environment, selecting the installation position of the spherical tank device 4, and arranging a horizontal foundation in a concrete slab or pouring mode;

in step S202, a boss (not labeled in the figure) for installing the supporting column 421 is provided on the base, and a plurality of base beams 424 made of i-steel are fixed on the base outside the boss, and the base beams 424 enclose a polygonal structure.

Step S3, mounting the support assembly 42.

Step S301, vertically fixing the support 421 on a boss (not labeled in the figure) of the foundation 41 along the circumferential direction according to the position of the connecting slot 4331 of the spherical shell assembly 43;

step S302, the first connecting end 4221 and the second connecting end 4231 are similar in structure, and each comprise two parts with inner walls in arc fit with the support posts 421; wherein the first portion is welded to the ends of the diagonal member 422 and the beam 423, respectively, and the second portion is engaged with the first portion by a linearly arranged bolt assembly; pretensioning the diagonal beam 422 and the cross beam 423 over the strut 421 via the first connection end 4221 and the second connection end 4231, respectively;

in step S303, a base spacer 411 is disposed between the second connection end 4231 and the base (not labeled in the figure) of the pillar 421, and a base Liang Dianpian is disposed between the lower end of the diagonal beam 422 and the base beam 424 to level the top plane of the first connection end 4221, and after leveling, the reduced bottom end of the connection post 426 is inserted into the pillar 421 while being limited by the first connection end 4221, and a filler (not shown in the figure) is disposed.

And S4, installing a traction assembly.

In step S401, a connecting lug 4211 is provided on the lower portion of the supporting post 421 or the second connecting end 4231, another connecting lug 4211 is provided on the upper portion of the supporting post 421 or the connecting post 426, and in the embodiment of fig. 1b, the connecting lugs 4211 are all provided on the supporting post 421; a pair of diagonal braces 4253 are installed between the four connecting lugs 4211 of the adjacent strut 421 in a crossing manner, and the ends of the diagonal braces 4253 are hinged on the connecting lugs 4211 through bolts;

step S402, limiting the first connecting member 4251 and the second connecting member 4252 that are mutually matched at the intersection of the diagonal tie 4253, reserving a through hole (not shown in the figure) on the first connecting member 4251, and reserving an arc-shaped opening (not shown in the figure) on the second connecting member 4252 that is matched with the outer diameter of the first connecting member 4251; during specific installation, the first connecting piece 4251 is sleeved on one diagonal lacing wire 4253 in advance, and is positioned on the other diagonal lacing wire 4253 through the through hole of the first connecting piece 4251 to avoid sliding, and the second connecting piece 4252 is sleeved with the other diagonal lacing wire 4253 and limited through the notch, so that collision friction caused by direct contact between the two diagonal lacing wires 4253 is avoided.

And S5, field installation of the spherical tank 43.

Step S501, lifting the spherical tank body 43, aligning the connecting grooves 4331 of the outer wall assembly 433 with the top diameter-reduced ends of the connecting column 426 (the connecting column 426 is formed by two end diameter-reduced ends, only the lower diameter-reduced end is shown in the figure, the upper diameter-reduced end is ground to form an arc surface, the connecting grooves 4331 are conveniently embedded in the connecting grooves 4331 while ensuring the contact area), slowly lowering the gravity center, enabling the spherical tank body 43 to slide in along the arc surface of the connecting column 426 under the action of self weight, realizing self-adaptive angle modulation, realizing pre-matching, continuing to lower the gravity center until the connecting grooves 4331 of the spherical tank body 43 completely cover the connecting column 426, loosening the hanging, and spot-welding the connecting grooves 4331 and the connecting column 426;

step S502, installing opening covers of the top opening 431 and the bottom opening 432 respectively, bonding nuts at corresponding inner side bolt openings, screwing special bolts from outside to inside, and enabling the end face of the screw rod to be flush with the inner side nuts after screwing. The access cover can be taken down at any time when empty, so that other process equipment and cleaning operation can be conveniently installed.

In addition, the step S4 can be adjusted according to the actual construction process, specifically, when the upper connecting lug 4211 is disposed on the connecting slot 4331, the step S4 is preferably performed during the lifting process of the spherical tank, so as to avoid the influence of the vertical degree of the pillar 421 due to the external tension, and when the diagonal lacing wire assembly 425 is installed, the subsequent construction process is performed after the loosening.

In addition, when the spherical tank 43 is too large in volume or mass, the lifting is not facilitated. In the step S5, spherical shell plates with connecting grooves 4331 are inserted respectively, and the installation of the isolation (heat) layer and the circulation assembly 44 required in the original workshop preparation process is changed to be performed in situ.

In addition, for the insulation layer 4332 having a certain thickness, which cannot achieve the corresponding function by spraying, it is possible to perform it by prefabricating a strip of the insulation layer 4332 having a certain width. Specifically, in order to improve production efficiency and realize batch production, the coil can be manufactured into coils, and the coils are provided with equidistant full-cut or half-cut notches 4332a, so that after the coils with a certain length are cut, when the isolation belt is paved along the outer wall of the spherical tank, extrusion protrusions generated by the isolation belt material due to curvature inner bending are avoided, and the paving surface is smoother. Where half cut refers to a gap 4332a that removes only a percentage of the thickness of the separator (as shown in fig. 1 f), rather than a through cut.

In addition, to the great condition of liquid density in the spherical tank, avoid the liquid pressure drop too big to lead to the unstability of spherical tank, on the spherical tank bottom outer wall that the atress is great, can also set up a plurality of pull protruding 4334 along certain horizontal or vertical interval crisscross setting as shown in fig. 1g along circumference on spherical shell wallboard 4333 to set up steel cable 4335 along pull protruding 4334, avoid droing, encircle the back with its both ends through the mounting structure similar with fig. 5a and constitute closed loop pull structure.

[ dehydration regeneration System ]

The dehydration regeneration system comprises a feeding pipeline L4, a dehydration regeneration device, a discharging pipeline L3 and a cylinder device 3 which are sequentially arranged. The dehydration regeneration device comprises a plurality of filtering separators 1, pressure supplementing pipelines L1, pressure relieving pipelines L2, pressure regulating devices 2, gas-liquid separators 4 arranged on the pressure regulating devices 2 and filters 5 arranged on a regeneration circulating pipeline, wherein the filtering separators 1, the pressure supplementing pipelines L1, the pressure relieving pipelines L2, the pressure regulating devices 2 are arranged in pairs. The filter 5 is used to remove particulate impurities entering the pressure regulating device 2.

Wherein, a first three-way valve T1 for communicating the cylinder device 3 and a second three-way valve T2 for communicating the regeneration cycle are arranged between the top pipes 18 of the filter separator 1, and a fourth three-way valve T4 for communicating the feeding pipeline L4 and a third three-way valve T3 for communicating the regeneration cycle are arranged between the bottom pipes 14 of the filter separator 1.

The pressure compensating pipeline L1 is provided with a first pressure sensor P1 and a third control valve V3; the pressure relief pipeline L2 is provided with a second pressure sensor P2 and a fourth control valve V4. The pressure sensor P1 and the pressure sensor P2 monitor the pressure state in the regeneration circulation pipeline in real time, and when the pressure is lower than the preset pressure, the pressure is supplemented into the regeneration circulation through the pressure supplementing device 6; when the pressure exceeds the safety threshold, the fourth control valve V4 is opened to release pressure, so that safety accidents are avoided.

In use, the second control valve V2 is opened and natural gas is fed through feed port 7 and feed line L4. By controlling the corresponding three-way valve, the filter separator 1 is alternatively connected into the system and passes through the filter separator 1 from bottom to top. The natural gas is subjected to desulfurization, demercuration, dearomatization and other impurities (the impurity removal structure is not shown in fig. 2) before being introduced into the dehydration system. As the dehydration proceeds, the molecular sieve particles 12 in the filter separator 1 gradually tend to saturate.

When the humidity sensor on the top pipe 18 of the filter separator 1 reaches the set threshold, the filter separator 1 on the side is separated from the dewatering system by controlling the corresponding first three-way valve T1 and fourth three-way valve T4, the second three-way valve T2 and third three-way valve T3 are controlled to connect the filter separator 1 on the side to the regeneration circulation system, and the filter separator 1 on the other side is connected to the dewatering system.

[ Filter separator ]

As shown in fig. 3 and 3a, the filtering separator 1 comprises an oval hollow shell 15, a bottom pipe 14 and a top pipe 18 which are oppositely arranged on the shell 15, a frustum-shaped flow director 17 arranged at the tail end of the bottom pipe 14 or the top pipe 18, and molecular sieve particles 12 which are limited in the shell 15 through ceramic balls in a floating manner, wherein the molecular sieve particles 12 are filled with the ceramic balls at the upper side and the lower side and are separated through a floating film 16.

The deflector 17 comprises a pair of isosceles trapezoid supporting plates 175 which are the centers of the supporting frameworks and are perpendicularly crossed, through holes 174 are uniformly formed in the isosceles trapezoid supporting plates, cone tops 171 and hollow cone bottoms 172 which are respectively fixed at the upper end and the lower end of the supporting plates 175, and a plurality of supporting ribs 173 which are circumferentially supported between the cone tops 171 and the cone bottoms 172. To further enhance the filtering effect, a filter screen (not shown) made of non-metal inert material may be wrapped outside the deflector 17 for filtering impurities with larger particles from the transportation pipeline or impurities generated by the broken ceramic balls of the filtering separator 1 itself.

When the filtering separator 1 is used for dehydration and CO removal ₂ When in use, molecular sieve particles (such as type 3A, type 4A and type 5A molecular sieves are commonly used). Those skilled in the art will appreciate that the shape and diameter of the molecular sieve particles can be adjusted according to the actual requirements and cost effectiveness of production. The inside of the filtering separator 1 is provided with a saturation detection component for the molecular sieve, which specifically can comprise humidity sensors (not shown in the figure) respectively arranged in a bottom pipe 14 and a top pipe 18 of the filtering separator 1, and an external screen (not shown in the figure) for monitoring the humidity value in cooperation with the humidity sensors. When the saturation of the molecular sieve is low, the humidity sensors of the jacking pipe 18 are almost 0%. With continuous use, the molecular sieve particles are distributed in a saturated manner from the jacking pipe 18 to the bottom pipe 14, and the humidity sensor reading of the jacking pipe 18 gradually approaches the bottom pipe 14 until the set overall saturation threshold is reached.

When the monitoring system monitors that the corresponding filtering separator 1 is saturated, the corresponding electromagnetic valve is controlled to be connected into the dehydration regeneration cycle. At this time, the top pipe 18 is connected to the regeneration gas pipeline, hot dry air flow at 100-500 ℃ is introduced, moisture in the molecular sieve particles 12 is separated from the filter separator 1 along with the regeneration gas, the molecular sieve particles are in saturated distribution from the bottom pipe 14 to the top pipe 18 until the bottom pipe 14 is consistent with the reading of the humidity sensor of the top pipe 18, and then the regeneration is completed. And controlling corresponding electromagnetic valves, and introducing cooling gas at 10-100 ℃ into the filter separator 1 until the numerical difference of the temperature sensor of the bottom pipe 14 is < +/-1 ℃.

In addition, the filtering separator 1 can also be used for mercury removal, wherein the molecular sieve particles are sulfur-immersed porous particles, and the following reaction mainly occurs in the molecular sieve particles: hg+S→HgS.

In addition, the filter separator 1 can also be used for N ₂ Or sulfide is removed, and at the moment, active carbon, amine adsorbent and the like are selected as molecular sieve particles.

When the catalyst is used for removing heavy hydrocarbon and aromatic hydrocarbon, the molecular sieve particles are made of adsorption materials such as activated carbon or NDA-201 resin (environmental protection technology company of Dagord, soona). NDA-201 has higher adsorption efficiency at 30-60 ℃.

[ pressure regulating device ]

As shown in fig. 4, the pressure regulating device 2 includes an electric pump 24 as a power source, a fluid reservoir 23 for storing hydraulic fluid, and a compression cylinder 25 for compressing gas. Wherein the upper and lower ends of the compression cylinder 25 are respectively provided with a magnetic sensor 252 for monitoring the stroke of the piston 251, a stroke switch may be used as an alternative.

A tee joint (not marked in the figure) is arranged on the upper pipeline of the compression cylinder 25, one end of the tee joint is communicated with the liquid inlet storage tank 212 through a liquid inlet pipe 21 provided with a first pressure regulating one-way valve 211, and the other end of the tee joint is communicated with the liquid outlet storage tank 224 through a liquid outlet pipe 22 provided with a second pressure regulating one-way valve 223. Meanwhile, in order to monitor the pressure of the liquid in the pipeline and set a drainage threshold, the drainage pipe 22 is also provided with a pressure sensor 222 and a safety valve 221.

A tee joint (not marked in the figure) is arranged on the bottom pipeline of the compression cylinder 25, one end of the tee joint is communicated with the fluid storage tank 23 through a first liquid return pipe 231 provided with a third pressure regulating check valve 233, the other end of the tee joint is communicated with the fluid storage tank 23 through a second liquid return pipe 232 provided with a fourth pressure regulating check valve 234 and a fifth pressure regulating check valve 235, the electric pump 24 is communicated with the fluid storage tank 23 through a liquid outlet pipe 236, and meanwhile, the liquid outlet pipe 236 is communicated with the third pressure regulating check valve 233 through the electric pump 24. The third pressure-regulating check valve 233, the fourth pressure-regulating check valve 234 and the fifth pressure-regulating check valve 235 are high-pressure valves.

The gas is introduced into the compression cylinder 25 through the intake pipe 21 by the electric pump 24. At this time, the third pressure-regulating check valve 233 and the fifth pressure-regulating check valve 235 are closed, the fourth pressure-regulating check valve 234 is opened, and the electric pump 24 pumps the hydraulic fluid along a bottom line (not labeled in the drawing) of the compression cylinder 25 into a lower space of the piston 251. Under the action of the electric pump, the piston 251 continuously compresses the gas in the upper space of the piston 251 upward, pressurizing and liquefying it. The pressure sensor 222 monitors the pressure value in the liquid discharge pipe 22 in real time, and when the pressure in the liquid discharge pipe 22 and the temperature of the liquid in the liquid discharge pipe 22 reach a preset value at the same time, the safety valve 221 is opened, and the piston 251 continues to move upward to discharge the liquefied gas into the liquid discharge tank. Piston 251 continues to rise until the magnetic sensor located at the top of the compression cylinder detects the piston position, i.e., piston 251 reaches the preset upper end point. At this time, the fourth pressure-regulating check valve 234 is closed, the third pressure-regulating check valve 233 and the fifth pressure-regulating check valve 235 are opened, and the hydraulic fluid is returned to the fluid reservoir 23 via the line 231. Bringing piston 251 down draws gas from feed reservoir 212 into the space above piston 251 of compression cylinder 25 and piston 251 continues to move down until it is detected by a magnetic sensor (not labeled) at the bottom of compression cylinder 25, i.e., piston 251 reaches the bottom end point. At this time, the third pressure-regulating check valve 233 and the fifth pressure-regulating check valve 235 are closed, and the fourth pressure-regulating check valve 234 is opened. The above process is repeated until the pressure sensor (not shown) in the feed tank 212 reaches a threshold value or the level sensor in the drain tank 224 reaches a threshold value.

In order to improve the performance of the hydraulic fluid, the requirements of the hydraulic device are met. Hydraulic fluids such as high water-based flame-retardant Hydraulic Fluid (HFA), water-glycol Hydraulic Fluid (HFC), phosphate hydraulic fluid (HEDR), fatty acid ester hydraulic fluid (HFD-U), antiwear hydraulic fluid, petroleum hydraulic fluid, synthetic hydraulic fluid, and flame-retardant hydraulic fluid may be used.

Meanwhile, in order to improve the working efficiency, a plurality of compression assemblies can be arranged, and the liquid discharge pipe of each compression assembly is connected with the LNG storage tank.

[ canister device ]

As shown in fig. 5, 5a and 5b, the canister device includes a foundation 31 disposed on a horizontal plane, a bottom plate 36 disposed on the foundation 31, an inner canister wall 33 disposed on the foundation, a plurality of cable assemblies 34 sleeved on the inner canister wall 33, an outer canister wall 32 disposed outside the cable assemblies 34, and a canister top 35. The cable assembly 34 comprises a preassembled section 341 with an opening preassembled on the inner tank wall 33, and a connecting section 342 with an opening closed by an anchor 343. The anchoring member 343 comprises more than two tooth plate assemblies 3432 screwed at the tail ends of the preassembly segment 341 or the connection segment 342, an anchor ring 3431 screwed on the tooth plate assemblies 3432, and a sleeve 3433 sleeved outside the anchor ring 3431.

The outer tank wall 32 or the inner tank wall 33 adopts a cylinder-like structure surrounded by a plurality of precast concrete panels (preferably arc panels with equal radian) which are arranged along the circumferential direction at equal angles. Regarding the manner of fixing the concrete slab, for example, two ring-shaped reinforcing bars (not shown in the drawing) concentrically arranged may be pre-buried on the foundation 31, and precast concrete panels as the outer tank wall 32 and the inner tank wall 33 are embedded in the ring-shaped grooves.

The pre-assembled sections 341 and the connecting sections 342 of the cable assembly 34 are made of steel cables which are convenient to cut, the cable winding mode is the same as the material, and different mark names are used for describing different stages of construction.

The construction steps are as follows:

step 1), a foundation 31 is built, a basal layer is built on a proper position of the ground, at least six positioning steel nails (at least three of each annular steel bar) are fixed on the basal layer, and two annular steel bars are positioned by the positioning steel nails (not shown in the figure) and are concentrically arranged. Concrete is respectively poured into the annular steel bars and between the annular steel bars, and a reinforcing layer is built outside the annular steel bars. The bottom plate 36 serving as the bottom of the tank is positioned after casting and reinforcement, and concrete is prevented from falling into the annular groove during casting.

Step 2), preparing concrete panels, and prefabricating two sets of concrete panels which are respectively used as an outer tank wall 32 and an inner tank wall 33 and have proper radians according to the comprehensive consideration of the factors such as the size of annular steel bars, the height of the tank wall, the concrete density, the concrete strength, the carrying capacity of a transport vehicle and the like.

Step 3), building an inner tank wall 33, and hoisting and embedding the precast concrete panels serving as the inner tank wall 33 into annular steel bar grooves after the precast concrete panels are transported to a construction site, so as to form the inner tank wall 33 with a gap (not marked in the figure). The width of the gap should be larger than the size of an electric pump (not shown in the figure) so as to facilitate the ingress and egress of constructors and equipment.

Step 4), fixing the cable assembly 34, and pre-fixing a plurality of anchors 343 (mainly referred to herein as sleeves 3433 for fixing the anchors 343) on the concrete panel at the gap along the height direction. Specifically, a plurality of bolts (not shown) are fixed in the height direction, and the bushings 3433 are fitted over the corresponding bolts. The sleeves 3433 of the left and right layers at the notch should be positioned at the same level. In order to avoid the cable from falling off due to lack of support, a plurality of sleeves 3433 are further arranged on the inner tank wall 33 at the same height, one end of the cable is clamped into an anchor ring 3431 at the left side of a gap in fig. 3a through a tooth plate assembly 3432, the cable is cut off after being wound around the inner tank wall 33 for one circle, and then is clamped into the anchor ring 3431 at the right side of the gap through the tooth plate assembly 3432, so that the winding and fixing of the cable are completed. And pretensioning of the pre-assembled segment 341 is achieved by adjusting the position of the anchor ring 3431 relative to the sleeve 3433.

Step 5), the outer tank wall 32 is built, and similar to step 3), the concrete panel serving as the outer tank wall 32 is hoisted and embedded into the annular steel bar groove, and the outer tank wall 32 with a notch (not marked in the figure) is formed in a surrounding manner. The width of the opening in the outer tank wall 32 should be greater than the opening in the inner tank wall 33 so as to avoid complete coverage of the sleeves 3433 at both ends of the opening when lifting the concrete panels of the outer tank wall 32. An annular support beam (not shown) is then secured between the inner tank wall 33 and the floor 36.

Step 6), closing the opening, installing a metal lining on the inner side of the inner tank wall 33, placing the electric pump in the tank, and closing the opening after the work such as perforating, wire arrangement, testing and the like is completed. The concrete panel serving as the inner tank wall 33 is hoisted and embedded into the annular steel bar groove, the position of the anchor ring 3431 relative to the sleeve 3433 is adjusted to tension each preassembled section 341, and two ends of the connecting section 342 are clamped into the anchor ring 3431 through the tooth plate assemblies 3432 until the whole gap is covered. After each anchor ring 3431 is adjusted to tighten each layer of cable, the concrete panel serving as the outer tank wall 32 is hoisted and embedded into the annular steel bar groove, and the closing of the opening is completed.

And 7), pouring, filling and installing the tank top 35, and pouring concrete from the top to between the outer tank wall 32 and the inner tank wall 33 after the opening is closed. After pouring, annular supporting beams (not shown in the figure) are fixed at the top ends of the concrete inner tank wall 33 and the concrete outer tank wall 32, the tank top 35 is hoisted above the tank body, and the tank top 35 and the supporting beams are welded and fixed.

The cable is preferably an ASTM-A821 prestressed cold drawn wire.

While the invention has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. The utility model provides a spherical storage tank with even casing atress, including supporting component (42), spherical jar body (43), supporting component (42) are including fixed pillar (421) on foundation (41), fixed on foundation (41) according to polygonal arrangement's basic beam (424), constitute sloping (422) and crossbeam (423) of triangle-shaped structure with pillar (421) cooperation, embedded pillar (421) and the both ends reducing spliced pole (426) of the upper end of cooperation in sloping (422), sloping (422) and crossbeam (423) cooperate with pillar (421) through setting up first link (4221) and second link (4231) at sloping (422) and crossbeam (423) terminal respectively;

the first connecting end (4221) and the second connecting end (4231) comprise a first arc-shaped part and a second arc-shaped part which are symmetrically hooped on the support column (421) through bolts; a base gasket (411) is arranged between the second connecting end (4231) and the foundation (41), and a base Liang Dianpian (412) is arranged between the inclined beam (422) and the base beam (424);

the spherical tank body (43) comprises a top opening (431), an outer wall assembly (433) and a bottom opening (432), and connecting grooves (4331) which correspond to the connecting columns (426) in number and are matched with each other are formed in the outer wall assembly (433); be equipped with on outer wall subassembly (433) along crisscross a plurality of tractive protruding (4334) that set up of outer wall circumference layer by layer, pull spacing steel cable (4335) on protruding (4334), two ends of steel cable (4335) pass through the anchor assembly cooperation and constitute closed loop construction, its characterized in that:

an oblique lacing wire component (425) is arranged between the adjacent support posts (421) or the connecting posts (426), and the oblique lacing wire component (425) comprises a pair of oblique lacing wires (4253) which are hinged through connecting lugs (4211) and are mutually crossed, and a first connecting piece (4251) and a second connecting piece (4252) which are limited between the oblique lacing wires (4253) through arc grooves or notches and are mutually matched;

the bottom opening (432) of the spherical tank body (43) is provided with a circulation assembly (44), the circulation assembly (44) comprises a plurality of guide ring layers which are arranged from inside to outside, the height of the guide ring layers is in gradient descent and the rotational flow directions of the adjacent ring layers are opposite, and the height of the guide plate of the guide ring layer at the outermost end is gradually reduced along the rotational flow direction; the bottoms of the guide plates are provided with guide grooves (4411) and connecting ends (4412) at intervals;

the dehydration regeneration system comprises a feeding pipeline (L4), a dehydration regeneration device, a discharging pipeline L3 and a spherical tank body (43) which are sequentially arranged; the dehydration regeneration device comprises a pair of filtering separators (1), pressure supplementing pipelines (L1), pressure relieving pipelines (L2), a pressure regulating device (2), a gas-liquid separator (8) arranged on the pressure regulating device (2), a filter (5) arranged on a regeneration circulation pipeline and a pressure supplementing device (6);

a first three-way valve (T1) for communicating the spherical tank body (43) and a second three-way valve (T2) for communicating the regeneration cycle are arranged between the top pipes (18) of the filtering separator (1), and a fourth three-way valve (T4) for communicating the feeding pipeline (L4) and a third three-way valve (T3) for communicating the regeneration cycle are arranged between the bottom pipes (14) of the filtering separator (1);

the pressure supplementing pipeline (L1) is provided with a first pressure sensor (P1) and a third control valve (V3); the pressure relief pipeline (L2) is provided with a second pressure sensor (P2) and a fourth control valve (V4); the pressure sensor (P1) and the pressure sensor (P2) monitor the pressure state in the regeneration circulation pipeline in real time, and when the pressure is lower than the preset pressure, the pressure is supplemented into the regeneration circulation through the pressure supplementing device (6); when the pressure exceeds a safety threshold, releasing pressure by opening a fourth control valve (V4);

the filtering separator (1) comprises an oval-like hollow shell (15), a bottom pipe (14) and a top pipe (18) which are oppositely arranged on the shell (15), a frustum-shaped deflector (17) arranged at the tail end of the bottom pipe (14) or the top pipe (18), and molecular sieve particles (12) which are limited in the shell (15) through ceramic balls in a floating way, wherein the molecular sieve particles (12) are filled with the ceramic balls at the upper side and the lower side and are separated through floating films (16); the deflector (17) comprises a pair of isosceles trapezoid supporting plates (175) which are used as supporting frameworks and are vertically crossed with each other, conical tops (171) and hollow conical bottoms (172) which are respectively fixed at the upper end and the lower end of the supporting plates (175), and a plurality of supporting ribs (173) which are circumferentially supported between the conical tops (171) and the conical bottoms (172); the outside of the fluid director (17) is wrapped with a filter screen made of nonmetallic inert materials.

2. The spherical tank with uniform shell stress according to claim 1, wherein: the base pad (411) and/or the base Liang Dianpian (412) are resilient pads.

3. The spherical tank with uniform shell stress according to claim 1, wherein: the outer wall component (433) is wrapped by an isolation layer (4332) formed by a plurality of isolation belts arranged layer by layer, and the isolation belts are provided with openings (4332 a) matched with the curvature of the spherical shell wall plates (4333) of the spherical tank body (43).