CN111547395A

CN111547395A - Hazardous chemical liquid storage device

Info

Publication number: CN111547395A
Application number: CN202010412925.2A
Authority: CN
Inventors: 蒋山; 邓一杰
Original assignee: Beijing Energy Storage Equipment Co ltd
Current assignee: Beijing Energy Storage Equipment Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-08-18

Abstract

The invention discloses a dangerous chemical liquid storage device, which is a double-layer tank structure and comprises: the inner-layer tank body is used for accommodating and storing liquid hazardous chemicals; and the outer structure body is of a reinforced concrete structure, a closed gap is arranged between the outer structure body and the inner tank body, and the closed gap is used for installing a leakage sensor to monitor the leakage condition of the inner tank body. The storage device for the hazardous chemical liquid can meet the storage requirement of the current environmental protection on the liquid hazardous chemical, and the service life of the product can reach more than 20 to 30 years. The storage device has low requirement on the use environment, and can be used in ports, wharfs and deserts in plateaus.

Description

Hazardous chemical liquid storage device

Technical Field

The invention relates to the field of petrochemical industry, in particular to a dangerous chemical liquid storage device used on the ground in the field of petrochemical industry.

Background

The environmental damage caused by liquid hazardous chemicals is enormous and difficult to reverse, and once leakage occurs, the cost of cleaning up contaminated soil and groundwater can be catastrophic to the enterprise. So its secure storage needs to be given more attention and attention. Owners and operators of storage devices for liquid hazardous chemicals need to face complex rules and safety reporting work, and under increasingly severe environmental protection requirements and safety requirements, the owners and operators can face requirements of equipment upgrading, detection equipment addition and even replacement. Selecting a storage device that meets the requirements is an ongoing task.

At present, the storage devices of the overground liquid dangerous chemicals in China are mostly in the forms of a single-layer steel storage tank, a single-layer steel storage tank plus a leakage sensor, a single-layer steel storage tank plus an anti-seepage pool and a double-layer steel storage tank.

The current market reserve of individual layer steel storage tank is huge, and the factor of safety of this kind of jar is low, reveals the risk height to unable installation monitored control system has the uncontrollable risk of hidden danger. Most of the storage tanks face the fate of upgrading and replacing, for example, oil storage tanks of gas stations, and the national mandatory requirement is to be replaced by a storage tank of a double-layer + monitoring system from 2015;

the single-layer steel storage tank + the leakage sensor are products in a period with lower environmental protection requirement at the initial stage, and the principle is that on the basis of the original steel single-layer tank, a leakage alarm device is additionally arranged, namely, the sensor is arranged in a tank field monitoring well, and the leakage is monitored manually. An alarm occurs after or during a storage medium leak. The alarm is given after pollutants are leaked to the environment, so that the requirements cannot be met under increasingly severe environmental protection requirements.

The storage device of the single-layer steel storage tank and the anti-seepage pool has high civil engineering requirements and difficult construction, and needs a larger field or a higher anti-seepage pool to prevent liquid from leaking into the environment beyond the anti-seepage pool. Because of the existence of the seepage-proofing pool, the device is interfered in use. And environmental evaluation reports are required in some regions, which causes huge cost and long approval period.

The double-layer steel storage tank is valued and used at present, a sealed gap is formed between the double-layer steel structures, the sensor can be installed in the gap, the storage medium can flow into the gap after leaking from the inner tank, the leakage sensor can send out an alarm signal, a user can timely handle the leakage, and the leakage of a pollution source into a soil environment can be effectively avoided. The gap between the double layers is generally formed by winding steel wire rings at intervals as supports or partially adding rectangular metal backing plates with certain thickness for supporting. However, because the structure is made of steel at the inner part and the outer part, particularly the steel at the outer layer, the corrosion condition is serious and the service life is reduced after the structure is exposed to the environment for a long time. And after a certain period of time, the maintenance of the anticorrosive coating is required, and the use cost is increased. In addition, the metal has a high heat transfer rate, is not suitable for storing liquid with a low boiling point on the ground, or needs special temperature reduction treatment, and increases the cost.

Therefore, a double-layer storage tank which can meet the requirements of environmental protection and safety and can store various liquid hazardous chemical substances is needed, and particularly a hazardous chemical substance liquid storage tank suitable for storing hazardous chemical liquid with a low boiling point is needed.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to provide an armored double-layer liquid storage tank used on the ground, which can meet the requirements of environmental protection and safety, can store various liquid hazardous chemical substances, is particularly suitable for storing the liquid hazardous chemical substances with lower boiling points, and effectively saves the operation cost of equipment.

In order to achieve the above object, the present invention provides a hazardous chemical liquid storage device, which has a double-layer tank structure, and comprises: the inner-layer tank body is used for accommodating and storing liquid hazardous chemicals; and the outer structure body is of a reinforced concrete structure, a closed gap is arranged between the outer structure body and the inner tank body, and the closed gap is used for installing a leakage sensor to monitor the leakage condition of the inner tank body.

Further, in the above technical solution, the concrete may be marked as C60 or C60 or more, and the thickness of the concrete is 160mm or more. The reinforcing steel bars can adopt a single-layer latticed binding mode and are arranged in the middle of the concrete, and the diameter of each reinforcing steel bar is larger than or equal to 14 mm.

Further, in the above technical solution, the closed gap may include a channel layer allowing the leakage liquid to flow, and the channel layer is provided with a lattice grid. The lattice type grid can adopt a hexagonal grid structure, and the connecting parts of the left and right vertexes of adjacent hexagons and the positions of the upper and lower edges of the hexagons are respectively provided with a groove; the groove is in a conducting state with the hollow part of the hexagonal structure.

Further, in the above technical scheme, the closed gap may further include a heat insulation layer filled with a heat insulation board located outside the channel layer. The heat insulation board is preferably a polystyrene heat insulation composite board.

Further, in the above technical scheme, the closed gap may further include a pouring isolation layer located outside the thermal insulation layer for preventing liquid concrete from penetrating into the thermal insulation layer when the concrete is poured. The pouring isolation layer is preferably filled with a polyethylene film.

Further, in the above technical scheme, the leakage sensor may be disposed in the channel layer in the closed gap, and the leakage sensor may be located at a position near the bottom of the channel layer or at an upper portion of the leakage detection riser inserted in the channel layer according to the detection level and actual needs, and the leakage sensor sends the leakage signal to the alarm system.

Compared with the prior art, the invention has the following beneficial effects:

1. the outer layer of the double-layer storage tank adopts a reinforced concrete structure, so that the corrosion prevention and maintenance of metal can be effectively reduced;

2. the outer layer concrete can resist flame burning for more than two hours without leakage; meanwhile, the polystyrene heat insulation composite board can effectively insulate heat;

3. a leakage detection system can be installed on the channel layer of the closed gap, and the sensors can be arranged at different positions as required, so that real-time data transmission can be realized;

4. the outer layer of high-grade concrete can bear considerable impact load without damage, and can be installed in places with more vehicles and areas with frequent earthquakes;

5. the combination of the reinforced concrete structure with the thickness of 160mm and the polystyrene heat insulation board can ensure that the natural temperature difference born by the internal liquid is relatively constant under the specified protection measures.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means implementable in accordance with the contents of the description, and to make the above and other objects, technical features, and advantages of the present invention more comprehensible, one or more preferred embodiments are described below in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic external view of a hazardous chemical liquid storage device according to the present invention.

FIG. 2 is a schematic view showing the binding of reinforcing steel bars on the inner tank and the outer layer in the hazardous chemical liquid storage device according to the present invention.

Fig. 3 is a schematic sectional view of the hazardous chemical liquid storage device of the present invention (showing a double-layer structure of the storage device and a closed gap-filling layer between the double-layer structure).

Fig. 4 is a front view of a lattice hexagonal grid filled in a closed gap channel layer according to the present invention.

Fig. 5 is a side view of a lattice hexagonal grid filled in a closed gap channel layer according to the present invention.

Description of the main reference numerals:

1-hazardous chemical liquid storage device, 10-closed gap, 11-outer concrete, 12-bidirectional steel bar keel, 13-inner tank body, 130-inner tank steel plate, 131-manhole, 100-leakage detection vertical pipe, 101-dot-matrix hexagonal grid, 1010-hexagonal structure, 1011-groove, 102-polystyrene heat insulation composite board and 103-polyethylene film.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Spatially relative terms, such as "below," "lower," "upper," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

In this document, the terms "first", "second", etc. are used to distinguish two different elements or portions, and are not used to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.

As shown in fig. 1 to 3, the hazardous chemical liquid storage device 1 of the present invention is an armored double-layer above-ground liquid storage tank for storing liquid hazardous chemical. This double-deck liquid storage tank includes: the inner-layer tank body 13 is used for containing and storing liquid hazardous chemical substances; the inner tank 13 is made of a steel metal material, although other composite materials may be used (the material of the inner tank 13 is selected according to the properties of the storage medium). For example, a steel sheet of Q235B can be used for storing petroleum products such as gasoline and diesel; a201/304 stainless steel can be used for the urea filling liquid; the storage acid-base chemical liquid can be made of polytetrafluoroethylene material with good corrosion resistance, and the material of the inner tank body 13 is selected based on the standard that the storage acid-base chemical liquid does not react with a storage medium (the storage medium is mostly a high-risk liquid of a class AB, such as gasoline, kerosene, methanol, ethanol, styrene, and the like) and is effective within the service life. The inner tank body 13 of the invention is a steel square storage tank: the storage tank is equipped with a manhole 131, a leakage detection vertical pipe 100, a liquid inlet, a liquid outlet, etc., and these pipe interfaces can be increased or decreased according to different use requirements (belonging to the prior art, and are not described herein again). The outer structure body of the double-layer storage tank is of a reinforced concrete structure, the outer concrete 11 is formed by integral casting, and the reinforcing steel bars are bidirectional reinforcing steel bar keels 12. A closed gap 10 is arranged between the outer reinforced concrete structure and the inner tank 13, and the closed gap 10 is used for installing a leakage sensor (not shown in the figure) so as to monitor the leakage condition of the inner tank 13 for storing hazardous chemical liquid.

Furthermore, in order to ensure the anti-seismic or anti-collision performance of the outer layer concrete, adaptive-grade non-contractible reinforced concrete is adopted. The outer concrete 11 is used for protecting stored liquid from leakage and combustion caused by impact and over-high collision energy when accidental impact occurs, wherein the impact can be caused by vehicles, landslides, falling objects and the like. The concrete is marked by C60 or C60 or above, and the thickness of the concrete is greater than or equal to 160 mm. In order to ensure the strength of the outer layer concrete 11, the bidirectional steel keel 12 is arranged in the middle of the thickness of the concrete 11, and the outer layer reinforced concrete structure has no splicing seams. Preferably, but not limitatively, the bidirectional steel keel 12 is made up of a single-layer latticed binding, with the diameter of the steel being greater than or equal to 14 mm.

As further shown in fig. 3, the closed gap 10 formed between the inner tank steel plate 130 and the outer layer reinforced concrete can provide an independent space for leak detection, and a class i, ii, and iii detection system can be provided in the independent space according to the hazard and actual needs of the storage medium. Among them, the class i detection system is required to detect the leakage or seepage above or below the liquid level in the double layer system, and it is safe itself, and can detect the leakage or seepage before any liquid enters the environment, and the corresponding detection method is usually a pressure method or a vacuum method. For example, a leak detection riser 100 may be inserted into the closed gap 10, and a pressure sensor as a leak sensor may be provided at an upper portion of the leak detection riser, which transmits a leak signal to an alarm system. The class ii detection system is also required to be able to detect leaks and leaks above or below the liquid level in the bilayer system, with the possibility of the leak detection liquid medium entering the environment, typically the corresponding detection method being a liquid medium detection method (e.g. monitoring by inert water). Class iii detection systems are required to detect leaks or leaks below the liquid level in a storage tank or pipeline system, and are based on liquid or gas sensors located between leak or seepage barriers or between detection gaps, and the possibility of the stored liquid entering the environment exists, and the corresponding detection method is generally a sensor method. A probe is arranged in the closed gap 10 in a targeted manner, so that the condition of preventing the leakage of the inner tank body 13 can be monitored.

As further shown in fig. 3, the closed gap 10 includes a channel layer for allowing a leakage fluid to flow, a heat insulation layer for preventing heat conduction, and a casting isolation layer for preventing liquid concrete from penetrating into the heat insulation layer and the channel layer when casting concrete. Specifically, the closed gap 10 contains three layers of fillers, the innermost side of the closed gap clings to the surface of the inner tank steel plate 130 is a dot-matrix hexagonal grid 101 (refer to fig. 4 and 5) made of a PE material, the grid shape is a hexagonal structure 1010 with a side length of 15mm, and the grid thickness is 3 mm. Preferably, but not limitatively, the connecting portions of the left and right vertices of the adjacent hexagons and the upper and lower sides of the hexagons are respectively provided with a groove 1011, and the grooves 1011 are in a communication state with the hollow portion of the hexagonal structure 1010. The grid is used for forming a space passage for the closed gap 10, if a sensor below the liquid level is used for monitoring, the sensor can be arranged at a position close to the bottom of the space passage, and when leakage occurs at any position of stored liquid, an indicating signal is provided for the detection sensor, and early warning processing is carried out.

As further shown in fig. 3, the insulation layer in the closed interspace 10 is filled with insulation panels, which are located outside the channel layer. Preferably, but not by way of limitation, the insulation panels are polystyrene insulation composite panels 102. The composite board thickness is 8mm, can effectual isolated ambient temperature to the influence of storage liquid to also can effectual protection inner tank storage liquid's safety and stability under the condition of proruption conflagration. The pouring isolation layer in the closed gap 10 is located outside the thermal insulation layer and used for enabling moisture to permeate into the thermal insulation layer when concrete is poured. Preferably, but not limitatively, the casting insulation layer is filled with a polyethylene film 103. The polyethylene film 103 can be used for protecting the forming process of the closed gap 10, namely, the film prevents liquid concrete from entering the gap, the polystyrene heat-insulation composite board 102 and the dot matrix hexagonal grid 101 are materials for supporting the gap, the structure of the gap cannot be influenced in the outer layer reinforced concrete pouring process, a certain sealing effect is achieved, and the air tightness of the gap layer is guaranteed.

The storage device for the hazardous chemical liquid can meet the storage requirement of the current environmental protection on the liquid hazardous chemical, and the service life of the product can reach more than 20 to 30 years. The storage device has low requirement on the use environment, and can be used in ports, wharfs and deserts in plateaus.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.

Claims

1. The utility model provides a dangerization article liquid storage device, its characterized in that, storage device is double-deck tank structure, includes:

the inner-layer tank body is used for accommodating and storing liquid hazardous chemicals;

and the outer structure body is of a reinforced concrete structure, a closed gap is arranged between the outer structure body and the inner tank body, and the closed gap is used for installing a leakage sensor to monitor the leakage condition of the inner tank body.

2. The hazardous chemical substance liquid storage device according to claim 1, wherein the concrete is marked with a reference number of C60 or C60 or more, and the thickness of the concrete is 160mm or more.

3. The hazardous chemical substance liquid storage device of claim 2, wherein the steel bars are tied in a single-layer grid shape and arranged in the middle of the concrete, and the diameter of the steel bars is larger than or equal to 14 mm.

4. The hazardous chemical substance liquid storage device of claim 1, wherein the closed gap comprises a channel layer allowing leakage liquid to flow, and the channel layer is provided with a lattice grid.

5. The hazardous chemical substance liquid storage device according to claim 4, wherein the lattice type grid is a hexagonal grid, and grooves are respectively formed in the connecting parts of the left and right vertexes of adjacent hexagons and the positions of the upper and lower edges of the hexagons; the groove is in a conducting state with the hollow part of the hexagonal structure.

6. The hazardous chemical liquid storage device of claim 4, wherein the closed gap further comprises a thermal insulation layer filled with a thermal insulation plate, and the thermal insulation plate is positioned outside the channel layer.

7. The hazardous chemical liquid storage device of claim 6, wherein the thermal insulation panel is a polystyrene insulation composite panel.

8. The hazardous chemical substance liquid storage device of claim 6, further comprising a casting insulation layer in the closed gap, the casting insulation layer being located outside the thermal insulation layer for preventing liquid concrete from penetrating into the thermal insulation layer when the concrete is cast.

9. The hazardous chemical substance liquid storage device of claim 8, wherein the casting insulation layer is filled with a polyethylene film.

10. The hazardous chemical liquid storage device of claim 4, wherein the leak sensor is located in a channel layer in the enclosed gap and is located near the bottom of the channel layer or in the upper portion of a leak detection riser inserted in the channel layer, the leak sensor sending a leak signal to an alarm system.