阅读说明：本技术 超临界二氧化碳排放管和超临界二氧化碳灭火装置 (Supercritical carbon dioxide discharge pipe and supercritical carbon dioxide fire extinguishing device ) 是由 蒋秀 于超 花靖 周日峰 靳彦欣 于 2020-07-01 设计创作，主要内容包括：本发明涉及二氧化碳灭火技术领域,公开了一种超临界二氧化碳排放管和超临界二氧化碳灭火装置,所述超临界二氧化碳排放管包括彼此连接的输送管段和喷射管段,所述输送管段为扰性金属管并且位于所述喷射管段的上游；所述超临界二氧化碳灭火装置包括二氧化碳储存部和所述超临界二氧化碳排放管,所述超临界二氧化碳排放管的入口端连接于所述二氧化碳储存部的出口。本发明的超临界二氧化碳排放管不需要使用时盘绕收纳,需要使用时再伸长使用,方便灵活,由此,超临界二氧化碳灭火装置的布置位置和距离也更灵活；并且,输送管段使用金属材料制成很好地减缓了超临界二氧化碳对输送管段的腐蚀和冲击,有利于延长超临界二氧化碳排放管的使用寿命。(The invention relates to the technical field of carbon dioxide fire extinguishing, and discloses a supercritical carbon dioxide discharge pipe and a supercritical carbon dioxide fire extinguishing device, wherein the supercritical carbon dioxide discharge pipe comprises a conveying pipe section and a spraying pipe section which are connected with each other, and the conveying pipe section is a flexible metal pipe and is positioned at the upstream of the spraying pipe section; the supercritical carbon dioxide fire extinguishing device comprises a carbon dioxide storage part and the supercritical carbon dioxide discharge pipe, wherein the inlet end of the supercritical carbon dioxide discharge pipe is connected to the outlet of the carbon dioxide storage part. The supercritical carbon dioxide discharge pipe is coiled and stored when not in use, and is extended for use when in use, so that the supercritical carbon dioxide discharge pipe is convenient and flexible, and the arrangement position and distance of the supercritical carbon dioxide fire extinguishing device are more flexible; moreover, the conveying pipe section is made of metal materials, so that the corrosion and impact of the supercritical carbon dioxide on the conveying pipe section are well slowed down, and the service life of the supercritical carbon dioxide discharge pipe is prolonged.)

1. A supercritical carbon dioxide discharge pipe, characterized in that it comprises a delivery pipe section (13) and an ejector pipe section (14) connected to each other, the delivery pipe section (13) being a flexible metal pipe and being located upstream of the ejector pipe section (14).

2. Supercritical carbon dioxide discharge pipe according to claim 1, characterized in that the inner diameter of the ejector pipe section (14) is gradually decreasing in the direction from the inlet to the outlet of the ejector pipe section (14).

3. Supercritical carbon dioxide discharge pipe according to claim 1, characterized in that the injection pipe section (14) comprises a plurality of injection pipe sections (9) in the extension direction, the plurality of injection pipe sections (9) being arranged coaxially, and the inner diameter of the injection pipe section (9) located downstream is smaller than the inner diameter of the injection pipe section (9) located upstream.

4. Supercritical carbon dioxide discharge pipe according to claim 1 characterized in that the ejector pipe section (14) is a rigid pipe.

5. Supercritical carbon dioxide discharge pipe according to claim 1 characterized in that the delivery pipe section (13) is sheathed with a heating jacket (29) at least on the side connected with the injection pipe section (14).

6. Fire extinguishing device according to claim 1, characterized in that a non-return valve (28) is arranged on the conveying pipe section (13), which non-return valve (28) is located on the side of the conveying pipe (13) that is connected to the injection pipe section (14).

7. Supercritical carbon dioxide discharge pipe according to claim 6, characterized in that the conveying pipe section (13) is sheathed with a heating jacket (29) on the side connected with the injection pipe section (14), and that the heating jacket (29) is provided both upstream and downstream of the non-return valve (28), the heating jacket (29) downstream of the non-return valve (28) extending to the downstream end of the conveying pipe section (13).

8. The supercritical carbon dioxide discharge pipe according to claim 1 is characterized in that a plurality of anti-cracking collars (27) are further arranged on the conveying pipe section (13) at intervals, and the anti-cracking collars (27) are sleeved on the outer peripheral wall of the conveying pipe section (13).

9. The supercritical carbon dioxide discharge tube according to claim 8 wherein the crack resistant collar (27) is more rigid than the delivery tube section (13).

10. The supercritical carbon dioxide discharge pipe according to claim 1 is characterized in that the delivery pipe section (13) is further formed with a filling port (12), a removable closure is arranged at the filling port (12), and the filling port (12) is close to one end of the injection pipe section (14) connected with the carbon dioxide storage part.

11. The supercritical carbon dioxide discharge pipe according to claim 1 wherein the delivery pipe section is provided with a grounded metal piece.

12. Supercritical carbon dioxide discharge pipe according to claim 1 characterized in that the delivery pipe section (13) is further provided with an injection pipe section fixing means on the side connected to the injection pipe section (14).

13. Supercritical carbon dioxide fire extinguishing apparatus, characterized in that the supercritical carbon dioxide fire extinguishing apparatus comprises a carbon dioxide storage section and a supercritical carbon dioxide discharge pipe, the inlet end of the supercritical carbon dioxide discharge pipe is connected to the outlet of the carbon dioxide storage section, the supercritical carbon dioxide discharge pipe is according to any one of claims 1-12.

Technical Field

The invention relates to the technical field of carbon dioxide fire extinguishing, in particular to a supercritical carbon dioxide discharge pipe and a supercritical carbon dioxide fire extinguishing device.

Background

The carbon dioxide density was 1.977kg/m under standard conditions³The carbon dioxide fire extinguisher is 1.52 times of air density, can be effectively isolated with fire source and air, uses the carbon dioxide fire extinguisher to put out a fire, and when carbon dioxide jetted out from storage container, pressure suddenly dropped, and carbon dioxide can be rapidly become gaseous state by liquid state transition and absorb a large amount of heats, reaches the cooling effect, consequently, carbon dioxide has fine fire extinguishing potential, and use supercritical carbon dioxide to put out a fire then can gain better fire extinguishing effect.

The existing supercritical carbon dioxide fire extinguishing apparatus may need to perform fire extinguishing treatment on a fire scene such as an oil depot, a crude oil storage tank, a warehouse, a production line and the like far away from the fire scene for some reasons, for example, the supercritical carbon dioxide fire extinguishing apparatus is not suitable to be moved due to a large volume or a safety problem, or the fire scene itself is not easy to approach, or the supercritical carbon dioxide needs to be fixedly arranged far away from the use scene, and at this time, a long conveying pipeline needs to be arranged to solve the problem that the supercritical carbon dioxide is conveyed and discharged to the fire scene.

Disclosure of Invention

The invention aims to provide a supercritical carbon dioxide discharge pipe which has long service life and is convenient and flexible and a supercritical carbon dioxide fire extinguishing device with the supercritical carbon dioxide discharge pipe.

In order to achieve the above object, the present invention provides a supercritical carbon dioxide discharge pipe comprising a delivery pipe section and an injection pipe section connected to each other, the delivery pipe section being a flexible metal pipe and located upstream of the injection pipe section.

Preferably, the inner diameter of the jet pipe section decreases gradually in a direction from the inlet to the outlet of the jet pipe section.

Preferably, the injection pipe section comprises a plurality of injection pipe sections in the extension direction, the plurality of injection pipe sections being arranged coaxially, and the inner diameter of the injection pipe section located downstream being smaller than the inner diameter of the injection pipe section located upstream.

Preferably, the jet pipe section is a rigid pipe.

Preferably, the conveying pipe section is sheathed with a heating jacket at least on one side connected with the injection pipe section.

Preferably, a non-return valve is arranged on the delivery pipe section, which non-return valve is located on the side of the delivery pipe connected to the injection pipe section.

Preferably, the delivery pipe section is sheathed with a heating jacket on the side connected to the injection pipe section, and the heating jackets are provided both upstream and downstream of the check valve, the heating jacket downstream of the check valve extending to the downstream end of the delivery pipe section.

Preferably, a plurality of anti-cracking lantern rings are further arranged on the conveying pipe section at intervals, and the anti-cracking lantern rings are sleeved on the outer peripheral wall of the conveying pipe section.

Preferably, the anti-rip collar is more rigid than the delivery tube section and has an inner diameter that is slightly larger than the outer diameter of the delivery tube section.

Preferably, a filling opening is further formed in the conveying pipe section, a detachable blocking piece is arranged at the filling opening, and the filling opening is close to one end, connected with the carbon dioxide storage part, of the injection pipe section.

Preferably, the conveying pipe section is provided with a grounding metal piece.

Preferably, the conveying pipe section is further provided with an injection pipe section fixing part on a side connected with the injection pipe section.

Another aspect of the present invention provides a supercritical carbon dioxide fire extinguishing apparatus comprising a carbon dioxide storage part and a supercritical carbon dioxide discharge pipe, an inlet end of the supercritical carbon dioxide discharge pipe being connected to an outlet of the carbon dioxide storage part, the supercritical carbon dioxide discharge pipe being a supercritical carbon dioxide discharge pipe according to the present invention.

In the supercritical carbon dioxide discharge pipe, the conveying pipe section which is arranged as a flexible metal pipe can be arranged to have a longer length, can be coiled and stored when not in use and can be extended for use when in use, and the use flexibility is better, so that a fire disaster which happens at a longer distance can be extinguished under the condition that the supercritical carbon dioxide fire extinguishing device does not need to be moved, and when the supercritical carbon dioxide fire extinguishing device is used for fire fighting of oil depots, crude oil storage tanks, liquid sulfur tanks, warehouses, production lines and the like, the supercritical carbon dioxide fire extinguishing device can be arranged at certain intervals for the oil depots, the crude oil storage tanks, the liquid sulfur tanks, the warehouses, the production lines and the like, and the arrangement position and the distance of the supercritical carbon dioxide fire extinguishing device are more flexible. Moreover, the conveying pipe section is made of metal materials, so that the corrosion and impact of the supercritical carbon dioxide on the conveying pipe section are well slowed down, and the service life of the supercritical carbon dioxide discharge pipe is prolonged.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a partial schematic structural view of a supercritical carbon dioxide discharge pipe according to an embodiment of the present invention;

FIG. 2 shows a schematic view of the supercritical carbon dioxide discharge pipe of FIG. 1 installed on a supercritical carbon dioxide fire suppression apparatus;

FIG. 3 shows a cross-sectional view of a carbon dioxide storage tank in the supercritical carbon dioxide fire suppression apparatus of FIG. 2;

fig. 4 is a partial schematic view showing the structure of a heated portion of the carbon dioxide storage tank, viewed from the left to the right in fig. 2.

Description of the reference numerals

1 a carbon dioxide preparation machine; 2, a carbon dioxide booster pump; 3 an upstream check valve; 4, emptying a pipe; 5, a carbon dioxide storage tank; 6 a communicating pipe valve; 7 an inner shell; 8, an outer shell; 9, segmenting the injection pipe; 10 heating the fins; 11 a downstream one-way valve; 12 filling port; 13 conveying the pipe section; 14 a jet pipe section; 15 a baffle; 16 a first temperature sensor; 17 a first pressure sensor; 19 a second temperature sensor; 20 a second pressure sensor; 21 a carbon dioxide discharge connection pipe; 22 emptying the valve; 23 heater electrical connections; 24 a protective cover; 25 heating the tube; 26 a liquid level meter; 27 a crack-resistant collar; 28 a check valve; 29 heating the jacket; 30 heat insulation support sleeve

Detailed Description

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

In the present invention, it is to be understood that the terms "away", "toward", "circumferential", "axial", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and also correspond to orientations or positional relationships in actual use; "inner and outer" refer to the inner and outer relative to the contours of the components themselves and are not intended to indicate that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The invention provides a supercritical carbon dioxide discharge pipe, which comprises a conveying pipe section 13 and an injection pipe section 14 which are connected with each other, wherein the conveying pipe section 13 is a flexible metal pipe and is positioned at the upstream of the injection pipe section 14.

In the supercritical carbon dioxide discharge pipe, the conveying pipe section 13 which is arranged as a flexible metal pipe can be arranged to have a longer length, the flexible metal pipe can be bent and coiled, coiled and stored when not needed, and extended for use when needed, so that the supercritical carbon dioxide discharge pipe has better use flexibility, and can extinguish fires which occur at a longer distance under the condition of not needing to move the supercritical carbon dioxide fire extinguishing device. Moreover, the conveying pipe section 13 is made of metal materials, so that the corrosion and impact of the supercritical carbon dioxide on the conveying pipe section 13 are well slowed down, and the service life of the supercritical carbon dioxide discharge pipe is prolonged.

In general, it is preferable to manufacture the conveying pipe section 13 from a metal material resistant to carbon dioxide corrosion, and in particular, the conveying pipe section 13 is manufactured from a metal material resistant to supercritical carbon dioxide corrosion, such as 304 stainless steel, 316L stainless steel, etc., carbon steel can be used as the manufacturing material of the conveying pipe section 13 if the water content of the transported carbon dioxide is less than 60% of the saturated water content of the carbon dioxide under the storage temperature and pressure conditions, and the ejector pipe section 14 is a rigid pipe, and the ejector pipe section 14 can be made from the same material as that of the conveying pipe section 13.

For the storage mode of the disturbing metal pipe, for example, a disc winding shaft and/or a roller and the like can be arranged at the body of the supercritical carbon dioxide fire extinguishing device or nearby so as to be used for placing and storing the conveying pipe section 13 around the disc winding shaft, and the winding part in the roller mode is not only favorable for fast winding and storing the conveying pipe section 13, but also favorable for fast pipe distribution so as to achieve the target site needing fire extinguishing.

Preferably, the delivery pipe section 13 is provided with a grounding metal member to prevent the carbon dioxide from generating static electricity during the rapid normal operation of the delivery pipe section 13, and in order not to obstruct the operation of the delivery pipe 13, the grounding metal member is preferably installed near the upstream side of the delivery pipe section 13, i.e., the side of the delivery pipe 13 near the carbon dioxide storage.

In some embodiments, the conveying pipe section 13 is at least provided with a heating jacket 29 on one side (the downstream side of the conveying pipe 13) connected with the injection pipe section 14, and after the supercritical carbon dioxide is conveyed through the conveying pipe section 13 and sprayed out from the injection pipe section 14, the supercritical carbon dioxide can chill (rapidly reduce) the surrounding environment, so that the conveying pipe section 13 generates a condensation phenomenon on the pipe wall of one side connected with the injection pipe section 14, and the transportation of the supercritical carbon dioxide in the conveying pipe section 13 is affected, therefore, the arrangement of the heating jacket 29 is beneficial to maintaining the pipe wall temperature of the conveying pipe 13, preventing the condensation phenomenon on the pipe wall of the conveying pipe 13, and reducing the possibility of carbon dioxide dry ice formation.

The heating jacket 29 may be an electric heating jacket and may be remotely controllable, and the side of the conveying pipe section 13 connected to the injection pipe section 14 is a portion which is relatively susceptible to the "chilling" of the supercritical carbon dioxide sprayed from the injection pipe section 14, and the arrangement of the heating jacket 29 on the portion can effectively reduce the "dewing" problem.

In some embodiments, a check valve 28 is disposed on the delivery pipe section 13, and the check valve 28 is located on the side of the delivery pipe 13 connected to the injection pipe section 14, thereby preventing the reverse flow of the delivered carbon dioxide. Referring to fig. 1, in the present embodiment, the heating jackets 29 are provided both upstream and downstream of the check valve 28 to better prevent the problem of "dewing" of the delivery pipe section 13 and also to ensure the proper operation of the check valve 28, and more specifically, the heating jackets 29 located downstream of the check valve 28 extend to the downstream end of the delivery pipe section 13.

Moreover, preferably, a plurality of anti-cracking collars 27 are further arranged on the conveying pipe section 13 at intervals, and the anti-cracking collars 27 are sleeved on the outer peripheral wall of the conveying pipe section 13. The anti-cracking lantern ring 27 can be a rigid lantern ring, for example, a metal sleeve is provided, the rigidity of the anti-cracking lantern ring 27 is greater than that of the conveying pipe section 13, the anti-cracking lantern ring 27 is provided on the outer peripheral wall of the conveying pipe section 13, the inner diameter of the anti-cracking lantern ring 27 is slightly greater than the outer diameter of the conveying pipe section 13, that is, a small interval gap is provided between the outer wall of the anti-cracking lantern ring 27 and the outer peripheral wall of the conveying pipe section 13, when a small crack is generated in the conveying pipe 13, the anti-cracking lantern ring 27 acts on the pipe wall of the hoop conveying pipe section 13 to prevent the crack from further expanding to cause the failure of the conveying pipe section 13, in order to achieve a good anti-cracking effect, the anti-cracking lantern ring 27 is provided on the conveying pipe section 13 at regular intervals, for example, one anti-cracking lantern ring 27 is provided on every 100 meters.

In addition, a filling opening 12 can be formed on the conveying pipe section 13, a detachable blocking piece is arranged at the filling opening 12, the filling opening 12 is close to one end, connected with the carbon dioxide storage part, of the injection pipe section 14, a carbon dioxide corrosion inhibitor and/or a dry ice inhibitor can be filled into the conveying pipe section 13 from the filling opening 12, the carbon dioxide corrosion inhibitor can reduce corrosion of supercritical carbon dioxide to a pipeline when the supercritical carbon dioxide passes through a discharge pipe, so that a water-containing device needing to be extinguished is protected, and the possibility of reuse of the device after extinguishment is increased; the dry ice inhibitor may prevent the formation of dry ice within the discharge tube as the supercritical carbon dioxide passes through the discharge tube.

For the specific form of the discharge pipe section 14, it is preferable that the inner diameter of the injection pipe section 14 is gradually reduced in the direction from the inlet to the outlet of the injection pipe section 14, and the flow rate of the fluid is gradually reduced as the inner diameter of the injection pipe 14 is gradually increased. In the conveying pipe section 13, due to the small inner diameter, the supercritical carbon dioxide can keep a high flow rate, so that the fluid is pushed to the flow in the jet pipe section 14 and the flow of the fluid in the jet pipe section 14, and the formed dry ice is damaged.

Further, referring to fig. 1, in the present embodiment, the injection pipe section 14 includes a plurality of injection pipe sections 9 along the extending direction, the plurality of injection pipe sections 9 are coaxially arranged, and the inner diameter of the injection pipe section 9 located at the downstream is smaller than the inner diameter of the injection pipe section 9 located at the upstream, the injection pipe section 14 of this form is easier to manufacture, the inner diameter of the injection pipe section 14 is reduced in steps along the direction from the inlet to the outlet of the injection pipe section 14, and the flow velocity of the fluid is reduced in steps as the inner diameter of the injection pipe section 14 is increased in steps.

In addition, in some embodiments, the delivery pipe section 13 is further provided with a spray pipe section fixing member on a side (a downstream side of the delivery pipe 13) connected to the spray pipe section 14 to facilitate fixing of the spray pipe section 14 in the fire extinguishing process.

Referring to fig. 1, in the fire extinguishing work using the discharge pipe of the illustrated embodiment, the jet pipe section 14 is fixed to the apparatus to be extinguished, the fire extinguishing operation is prepared, the heating jacket 29 is opened, the filling port 12 is opened, and the carbon dioxide corrosion inhibitor and the dry ice inhibitor are filled into the delivery pipe section 13.

According to another aspect of the present invention, there is provided a supercritical carbon dioxide fire extinguishing apparatus including a carbon dioxide storage part and a supercritical carbon dioxide discharge pipe having an inlet end connected to an outlet of the carbon dioxide storage part.

Supercritical carbon dioxide extinguishing device's carbon dioxide storage portion includes carbon dioxide storage tank 5, carbon dioxide storage tank 5 is including heat preservation casing, heater, temperature detecting element and pressure detecting element, the heater is including extending to the inside heating portion of heat preservation casing, temperature detecting element with pressure detecting element's detecting probe all extends to inside carbon dioxide storage tank 5.

For the supercritical carbon dioxide fire extinguishing device, under the non-working state without fire extinguishing treatment, the temperature of the carbon dioxide in the carbon dioxide storage tank 5 can be controlled, so that the stored carbon dioxide is in a liquid state, the carbon dioxide occupies a smaller volume and is convenient to store; when needs put out a fire and handle, when supercritical carbon dioxide extinguishing device was in operating condition promptly, can heat the heat preservation casing inside through the heater for liquid carbon dioxide intensifies and pressurizes to supercritical state, can make the carbon dioxide in the carbon dioxide storage tank 5 become supercritical state and discharge the outside with supercritical state and put out a fire, and the fire control effect is better than the fire control effect of equivalent critical state or liquid carbon dioxide.

Among them, in order to make the thermal insulation casing have better thermal insulation effect to better keep the carbon dioxide stored therein at a desired temperature (state), preferably, the thermal insulation casing includes an inner casing 7, an outer casing 8, and a thermal insulation layer sandwiched between the inner casing 7 and the outer casing 8.

In some embodiments, the inner shell 7 is a metal shell to better resist corrosion of the inner shell 7 by the carbon dioxide stored therein (especially supercritical carbon dioxide), for example, the inner shell 7 may be made of a metal material resistant to corrosion by supercritical carbon dioxide, such as 304 stainless steel, 316L stainless steel, etc., and if the water content of the transported carbon dioxide is less than 60% of the saturated water content of the carbon dioxide under the storage temperature and pressure conditions, carbon steel, such as 16MnR, Q235-a, 20R, etc., may also be used as the material for making the inner shell 7. The outer shell 8 is a non-metal shell made of a non-metal material which resists carbon dioxide swelling and cracking, so that the outer shell 8 of the storage tank is prevented from being damaged during carbon dioxide emission, heat transfer with the outside is reduced, and a better heat preservation effect is achieved, and optionally, the outer shell 8 can also be made of a metal material which resists atmospheric corrosion; and a space between the inner shell 7 and the outer shell 8 is filled with a heat insulation material to form a heat insulation layer, so that the temperature in the heat insulation shell can be kept.

Wherein, in some embodiments, the heater may be an electric heater, for example, referring to fig. 3, in the present embodiment, the heater includes a heater electrical connector 23 located outside the carbon dioxide storage tank 5, the heating portion is electrically connected with the heater electrical connector 23, and a protective cover 24 may be further provided, the heater electrical connector 23 is disposed in the protective cover 24 to protect the heater electrical connector 23 and improve the installation performance.

Further, the heating part includes a heating pipe 25, the heating pipe 25 extends from one end of the carbon dioxide storage tank 5 into the heat preservation shell and continues to be close to the other end of the carbon dioxide storage tank 5, that is, the heating pipe 25 substantially passes through the whole extension length of the carbon dioxide storage tank 5, for example, in the present embodiment, the carbon dioxide storage tank 5 is horizontal, the heating pipe 25 horizontally passes through substantially the whole length direction of the carbon dioxide storage tank 5, and the end of the heating pipe 25 does not contact with the inner shell 7 but does not contact with the inner shell.

Wherein, optionally, the carbon dioxide storage tank 5 is formed with a mounting through hole at the one end, a heat insulation support sleeve 30 is sleeved in the mounting through hole, the heating pipe 25 passes through and is supported by the heat insulation support sleeve 30, and the heat insulation support sleeve 30 is made of a non-heat-conducting and corrosion-resistant material.

In order to obtain a faster and better heating effect, the heating part further comprises a plurality of heating fins 10 extending from the heating pipe 25, and the plurality of heating fins 10 are arranged at intervals along the circumferential direction of the heating pipe 25 and respectively extend along the radial direction of the heating pipe 25 so as to increase the heating area in the internal space of the heat-insulating shell and enable the carbon dioxide in the heat-insulating shell to be heated more rapidly and uniformly.

Further, the heating part includes at least two heating pipes 25 parallel to each other, wherein two adjacent heating pipes 25 include at least one pair of heating fins 10 opposite to and connected to each other, referring to fig. 3 and 4, in the illustrated embodiment, two heating pipes 25 parallel to each other are included, each heating pipe 25 includes eight heating fins 10, and three pairs of heating fins 10 opposite to each other are included in the two heating pipes 25, wherein pairs of heating fins 10 located at upper and lower portions are connected to each other, thereby not only increasing a heating area but also improving structural integrity and stability of the heating part.

Further, the heating part also comprises at least one guide plate 15, the extension axis of the heating pipe 25 is perpendicular to the guide plate 15, the guide plate 15 plays a role in connecting each heating fin 10 of the heating pipe 25, the heating area is increased, and the structural integrity and the stability of the heating part are improved.

In addition, in order to be able to detect the temperature and pressure inside the carbon dioxide storage tank 5 so that the carbon dioxide stored therein is maintained in a desired state (liquid state or supercritical state), the temperature detection unit includes a first temperature sensor 16, the pressure detection unit includes a first pressure sensor 17, the first temperature sensor 16 and the first pressure sensor 17 are both provided on the heat-insulating housing, and the detection probes of the first temperature sensor 16 and the first pressure sensor 17 extend to the inside of the heat-insulating housing.

The first temperature sensor 16 and the first pressure sensor 17 are mainly used to detect the temperature and the pressure of the carbon dioxide stored inside the insulated shell, respectively, and ensure that the stored carbon dioxide therein remains in a liquid state in the carbon dioxide storage tank 5 during non-operation, and reaches a supercritical state by heating during operation for fire extinguishing. The first temperature sensor 16 and the first pressure sensor 17 are preferably mounted on the heat-insulating case at positions close to the middle-lower portion of the heat-insulating case in order to obtain a detection result accurately.

In order to detect the temperature and the pressure of the carbon dioxide discharged from the carbon dioxide storage tank 5, a carbon dioxide outlet is formed on the heat-insulating housing, the carbon dioxide storage tank 5 further includes a carbon dioxide discharge connection pipe 21 extending from the carbon dioxide outlet to the outside of the heat-insulating housing, the temperature detection unit includes a second temperature sensor 19, the pressure detection unit includes a second pressure sensor 20, the second temperature sensor 19 and the second pressure sensor 20 are both disposed on the carbon dioxide discharge connection pipe 21, and the detection probes of the second temperature sensor 19 and the second pressure sensor 20 both extend to the inside of the carbon dioxide discharge connection pipe 21. The carbon dioxide in the carbon dioxide storage tank 5 enters the carbon dioxide discharge connecting pipe 21 from the carbon dioxide outlet and then is discharged to the outside, and the carbon dioxide in the discharge connecting pipe 21 is subjected to temperature and pressure detection, so that the state of the carbon dioxide when the carbon dioxide is discharged from the carbon dioxide storage tank 5 can be more accurately monitored, the carbon dioxide entering the next space is better kept to be the carbon dioxide in a supercritical state, and preferably, the second temperature sensor 19 and the second pressure sensor 20, and the first temperature sensor 16 and the first pressure sensor 17 exist at the same time.

And, carbon dioxide storage tank 5 still includes that the test probe extends to the inside level gauge 26 of heat preservation casing to detect the inside liquid level of heat preservation casing, in time supply carbon dioxide to carbon dioxide storage tank 5 to suitable liquid level when needing.

The carbon dioxide inlet pipe 18 and the carbon dioxide outlet pipe 21 on the carbon dioxide storage tank 5 are provided with flanges at the ends to be connected with other parts (inlet pipe and outlet pipe), and the flanges are provided with gaskets which can be corrosion-resistant metal gaskets or carbon dioxide corrosion-resistant non-metal gaskets.

In addition, a vent hole is formed in the heat-insulating shell, the carbon dioxide storage tank 5 further comprises a vent pipe 4 extending out of the heat-insulating shell from the vent hole, and a vent valve 22 is arranged on the vent pipe 4. If the pressure in the carbon dioxide storage tank 5 exceeds the maximum pressure which can be borne by the storage tank, the emptying valve 22 can be opened to release the carbon dioxide in the carbon dioxide storage tank 5 to the outside of the carbon dioxide storage tank 5, so that the safety is ensured.

In a preferred embodiment, the supercritical carbon dioxide fire extinguishing apparatus further comprises a carbon dioxide preparation machine 1 and a carbon dioxide booster pump 2, wherein an outlet of the carbon dioxide preparation machine 1 is connected to an inlet of the carbon dioxide booster pump 2, and an outlet of the carbon dioxide booster pump 2 is connected to an inlet of the carbon dioxide storage unit, so that high-pressure carbon dioxide can be timely supplemented to the carbon dioxide storage unit, and carbon dioxide can be continuously prepared and supplied to the carbon dioxide storage unit during fire extinguishing, thereby solving the problems that the existing high-pressure carbon dioxide storage tank has short fire extinguishing duration and cannot realize secondary discharge when fire extinguishing. Preferably, carbon dioxide preparation machine 1 can use air as a source of gas to prepare carbon dioxide.

In some embodiments, the carbon dioxide storage unit includes at least two carbon dioxide storage tanks 5, each of the carbon dioxide storage tanks 5 is connected in parallel, a communication pipe is disposed between two adjacent carbon dioxide storage tanks 5, two ends of the communication pipe are respectively communicated to the interiors of the two carbon dioxide storage tanks 5, and a communication pipe valve 6 is disposed on the communication pipe. Therefore, any one or all of the carbon dioxide storage tanks 5 connected in parallel can supply supercritical carbon dioxide for fire extinguishing treatment, and even if one fails, the other can still work to improve the stability of the whole supercritical carbon dioxide fire extinguishing device; moreover, when the pressure or the storage capacity of the carbon dioxide in one of the carbon dioxide tanks exceeds the full load state, the carbon dioxide can be conveyed to other carbon dioxide storage tanks 5 by opening the communicating pipe valve 6, so that the safety of the device is improved, and the waste of direct emptying of the carbon dioxide is avoided.

Further, in order to improve the controllability of each carbon dioxide storage tank 5, an upstream check valve 3 and a downstream check valve 11 are provided upstream and downstream of each carbon dioxide storage tank 5 in a branch line in which each carbon dioxide storage tank 5 is located. By controlling the upstream check valve 3 and the downstream check valve 11 on each branch, it is possible to choose to supply carbon dioxide to one of the carbon dioxide storage tanks 5 individually, or to extinguish a fire by using only carbon dioxide in one of the carbon dioxide storage tanks 5, or to discharge carbon dioxide from several or all of the carbon dioxide storage tanks 5 simultaneously.

Referring to the embodiment of fig. 2, carbon dioxide is not required to be delivered to the two carbon dioxide storage tanks 5 during fire extinguishing, the operation is stopped after the pressure or liquid level requirement of the carbon dioxide storage tanks 5 is met, carbon dioxide generated by the carbon dioxide preparation machine 1 is pressurized by the carbon dioxide booster pump 2 and then delivered to the carbon dioxide storage tanks 5, when carbon dioxide is required to be delivered to the carbon dioxide storage tanks 5, the upstream check valves 3 are opened, and the other time, the closed state of the upstream check valves 3 is kept. When the pressure in the carbon dioxide storage tank 5 exceeds the maximum storage pressure, the communicating pipe valve 6 can be opened to convey carbon dioxide into the other carbon dioxide storage tank 5, and the pressure in the two carbon dioxide storage tanks 5 is balanced. If the pressure in the two carbon dioxide storage tanks 5 exceeds the maximum storage pressure, the emptying valve is opened, carbon dioxide is released out of the carbon dioxide storage tank 5, and the carbon dioxide storage tank 5 is known to reach the pressure requirement range.

Preferably, the supercritical carbon dioxide fire extinguishing device is set to keep the carbon dioxide in the carbon dioxide storage tank 5 in a liquid state when the supercritical carbon dioxide fire extinguishing device is in a non-working state, the temperature in the carbon dioxide storage tank 5 is controlled to be 24-26 ℃, and the pressure is controlled to be 10-20 MPa. When the supercritical carbon dioxide fire extinguishing device is needed to be used for fire extinguishing treatment, namely the supercritical carbon dioxide fire extinguishing device is in a working device, the heater is started to heat, so that the carbon dioxide in the carbon dioxide storage tank 5 is rapidly heated, the pressure is increased, specifically, the temperature of the carbon dioxide in the carbon dioxide storage tank 5 reaches over 31.1 ℃, the pressure of the carbon dioxide in the carbon dioxide storage tank 5 is greater than or equal to 7.38MPa, and the carbon dioxide is in a supercritical state. Because the supercritical carbon dioxide is adopted for fire extinguishing, the carbon dioxide sprayed out can quickly reach-78.5 ℃ under the Joule-Thomson effect, the flame can be quickly cooled, and the carbon dioxide has better air isolation effect on the flame due to the fact that the density of the carbon dioxide is larger than that of air, so that the effects of quickly extinguishing fire and inhibiting reburning are achieved.

The supercritical carbon dioxide fire extinguishing device is suitable for rapid cooling, fire extinguishing and re-combustion inhibition when a fire occurs in a crude oil storage tank, a finished oil storage tank, a chemical raw material storage tank, a high-temperature storage tank, an oil depot, a warehouse, a chemical device, a pipeline, a ship, an offshore platform, a liquid flow storage tank and the like, and is high in fire extinguishing speed and efficiency.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention. Including each of the specific features, are combined in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.