Perfluorohexanone and supercritical CO2 mixing device

Abstract

The invention discloses a perfluorohexanone and supercritical CO2 mixing device which is characterized in that a heat preservation cavity and a pressure pump are arranged on a pipeline from a perfluorohexanone container to a mixer, a constant-temperature electric heat tracing layer is arranged on the outer wall of the heat preservation cavity, and a stirring shaft is arranged in the mixer; cO2 and perfluorohexanone are in a dynamic mixing state through a plunger pump, the solubility of CO2 in perfluorohexanone is improved, when CO2 is released at the tail end, the proportion of perfluorohexanone is 17.5, compared with 50.07 under the common condition, 65% of the use amount of perfluorohexanone can be saved, the fire suppression duration is prolonged, in addition, after supercritical mixing is adopted, the viscosity is 1 / 5 of the viscosity of perfluorohexanone, and the fire suppression effect is good. The pressure loss in the pipeline is effectively reduced, and the conveying distance is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fire fighting, in particular to a device for extinguishing perfluorohexanone and CO2. BACKGROUND

[0002] Perfluorohexanone (C6F 12 O) is a liquid at room temperature and normal pressure, with a boiling point of about 49.2℃, suitable for liquid storage and transportation, and mainly extinguishes fire through chemical inhibition (interrupts combustion chain reaction) and cooling effect. Perfluorohexanone is environmentally friendly: ODP (Ozone Depletion Potential) is 0, and GWP (Global Warming Potential) is low, suitable for replacing traditional halon extinguishing agents. CO2 mainly extinguishes fire by asphyxiation (reducing oxygen concentration) and cooling effect, and since both are environmentally friendly, it is commonly used for fire extinguishing.

[0003] Chinese patent CN 111589020A discloses a perfluorohexanone rapid fire extinguishing device, which comprises a perfluorohexanone spraying assembly, a CO2 generating device, a water mist generating device, a mixing chamber and a spray head. The perfluorohexanone spraying assembly is connected to the spray head through a pipeline. The CO2 generating device and the water mist generating device are both connected to the mixing chamber, and are connected to the spray head through a pipeline after being connected to the mixing chamber. The spray head comprises an inner spray head and a shell, and the shell is wrapped on the inner spray head to form a mixing flow channel between the shell and the inner spray head. A plurality of water mist nozzles are arranged on the shell.

[0004] Chinese patent CN 119951082A discloses a new energy automobile fire extinguishing robot device, which uses supercritical CO2 as the continuous phase main body of the isolation extinguishing agent. The supercritical CO2 has both the diffusivity of gas and the solubility of liquid, and can quickly penetrate into the tiny gaps of the battery pack, bringing other components into the battery to achieve internal suppression of thermal runaway reaction.

[0005] Chinese patent CN 116474298 A discloses a method and device for saturating and dissolving carbon dioxide gas into perfluorohexanone. The device comprises: an oscillation vehicle for fixing a fire extinguisher for injecting perfluorohexanone extinguishing agent; a CO2 compressed gas source for injecting carbon dioxide compressed gas with a predetermined pressure into the fire extinguisher; an oscillation driving module for driving the oscillation vehicle to perform horizontal reciprocating oscillation and controlling the oscillation amplitude, so as to destroy the solution layer generated on the contact surface between the carbon dioxide gas and the perfluorohexanone extinguishing agent solution in the fire extinguisher, and promote the dissolution of the carbon dioxide compressed gas into the perfluorohexanone extinguishing agent to generate a saturated solution.

[0006] The three patents disclose the technical means of applying perfluorohexanone and CO2 together for fire extinguishing, but in practice, since perfluorohexanone gas concentration reaching 9% can achieve sustained fire suppression, the perfluorohexanone concentration in the prior art under normal temperature and pressure is relatively high, which can cause waste or short fire suppression time; in addition, the perfluorohexanone has high viscosity, and the pressure loss in the pipeline is large, which affects the transportation distance. SUMMARY

[0007] The purpose of the present application is to provide a perfluorohexanone and supercritical CO2 mixing device with high solubility and long transportation distance.

[0008] To achieve the above purpose, the perfluorohexanone and supercritical CO2 mixing device comprises a perfluorohexanone container and a supercritical CO2 container, a perfluorohexanone output pipe, a supercritical CO2 output pipe, a mixer and a release pipeline, wherein a heat preservation cavity and a pressure pump are provided on the pipeline from the perfluorohexanone container to the mixer, the outer wall of the heat preservation buffer cavity is provided with a constant temperature electric heating layer, and the mixer is provided with a stirring shaft.

[0009] The mixer is a long pipe, which is composed of an outer layer of normal pressure perfluorohexanone heat preservation buffer cavity and an inner layer of mixing cavity, and the outer part of the buffer cavity is provided with a constant temperature electric heating layer, and the mixing cavity is provided with a hydraulic motor driven stirrer.

[0010] The pressure of the pressure pump is greater than 8MPa, one way of the pressure pump outlet is connected with a hydraulic motor, and the other way is connected with a mixing cavity.

[0011] The present application improves the solubility of CO2 in perfluorohexanone by means of plunger pump to make CO2 and perfluorohexanone in a dynamic mixing state, and avoids the temperature from dropping below the critical point by heating the buffer cavity, so that the solubility of CO2 in perfluorohexanone is 1cm 3 The solubility of 536 volumes of gas can be dissolved, and when released at the end, perfluorohexanone accounts for 17.5%, compared with 50.07 under ordinary conditions, which can save 65% of perfluorohexanone, improve the fire suppression time, and in addition, after supercritical mixing, the viscosity is 1 / 5 of that of perfluorohexanone, which effectively reduces the pressure loss in the pipeline and improves the transportation distance. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The structure of the present application is shown in Figure 1.

[0013] Figure 2 The structure of the present application is shown in Figure 1.

[0014] Figure 3 The structure of the present application is shown in Figure 1.

[0015] Figure 4 The structure of the present application is shown in Figure 1.

[0016] Reference Signs:

[0017] 1, perfluorohexanone container; 11, perfluorohexanone output pipe; 11a, perfluorohexanone out-container pipe; 11b, perfluorohexanone into-pump pipe; 11c, perfluorohexanone out-pump into-mixer pipe; 11d, perfluorohexanone backflow pipe; 11e, perfluorohexanone overflow pipe; 111A, thermostatic electric heat tracing layer; 2, supercritical CO2 container; 21, pressure stabilizer; 22, supercritical CO2 output pipe; 3, mixer, 31, normal-pressure perfluorohexanone heat preservation buffer cavity; 311, thermostatic electric heat tracing layer; 32, mixing cavity, 4 release pipeline, 5, pressurizing pump, 6, hydraulic motor; 7, stirrer. DETAILED DESCRIPTION

[0018] To describe the technical content, structural features, purposes and effects of the present application in detail, the following will be described in detail in combination with the embodiments and the accompanying drawings.

[0019] Example 1 is shown in Figure 1 , 2 , 3, mainly composed of perfluorohexanone container 1, supercritical CO2 container 2, mixer 3 and pressurizing pump 5 (using high-pressure plunger pump), the mixer 3 is a long pipe with two layers, the outer layer of the mixer 3 is a normal-pressure perfluorohexanone heat preservation buffer cavity 31, and the inner layer is a mixing cavity 21, the buffer cavity 31 is provided with a thermostatic electric heat tracing layer 311 outside, and the mixing cavity 32 is provided with a stirrer 7 driven by a hydraulic motor 6. The perfluorohexanone out-container pipe 11a of the perfluorohexanone out-container pipe at the lower end of the perfluorohexanone container 1 is connected to the normal-pressure perfluorohexanone heat preservation buffer cavity 31 of the mixer 3, and the perfluorohexanone is preserved at normal pressure at about 40°C (greater than 31.06°C in supercritical environment), the buffer cavity in the thermostatic supercritical mixer is provided with 4-way external communication interfaces, 11a-way is used for supplementing the medicament, 11b-way is used for delivering the medicament to the pump set, and 11d\e two-way backflow ports are used for hydraulic motor and overflow valve backflow.

[0020] The perfluorohexanone container 1 is provided with normal-pressure liquid perfluorohexanone medicament, the supercritical CO2 container 2 stores high-pressure CO2 gas, which is output by the supercritical CO2 output pipe 22 after being stabilized to about 9 MPa pressure by the pressure stabilizing valve 21 and then enters the supercritical mixing cavity 32.

[0021] When the system is started, the high-pressure plunger pump 5 extracts the 40°C perfluorohexanone medicament from the buffer cavity 31, and is pressurized to above 8 MPa. After pressurization, part of the medicament is injected into the hydraulic motor 6 to drive the hydraulic motor to rotate and drive the stirrer 7 in the supercritical mixing cavity 32 to rotate at high speed. The other part of the medicament flows into the mixing cavity 32 through the perfluorohexanone injection port and is fully mixed with CO2 under the action of the stirrer.

[0022] Figure 4For another embodiment of the present application, different from the embodiment 1, the normal pressure perfluorohexone heat preservation buffer cavity 31 is not arranged, the constant temperature electric heat tracing layer 311 is arranged on the three pipelines of the perfluorohexone outlet container pipe 11a, the perfluorohexone inlet pump pipe 11b and the perfluorohexone outlet pump inlet mixer pipe 11c, the three pipelines are heated and preserved, the temperature of the perfluorohexone is greater than 31.06℃ when mixed, the medicament is ensured to flow stably in a supercritical state under the constant temperature and high pressure (8-9 MPa), and the influence of phase change is avoided.

[0023] The above description is only the embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent flow transformation, or direct or indirect application in other related technical fields, which is made by using the content of the specification and the drawings, is also included in the patent protection scope of the present application.

Claims

1. A perfluorohexanone and supercritical CO2 mixing device comprising a perfluorohexanone container and a supercritical CO2 container, a perfluorohexanone output pipe, a supercritical CO2 output pipe, and a mixer and a release pipe, characterized by: The heat preservation cavity and the pressurizing pump are arranged on the pipeline of the perfluorohexanone container to the mixer, the outer wall of the heat preservation buffer cavity is provided with a constant temperature electric heating layer, and the mixer is provided with a stirring shaft.

2. A perfluorohexanone and supercritical CO2 mixing apparatus as defined in claim 1, wherein: The mixer is a long tubular structure, which is composed of a perfluorohexanone buffer cavity in an outer layer and a mixing cavity in an inner layer.

3. A perfluorohexanone and supercritical CO2 mixing apparatus as defined in claim 2, wherein: The pressurizing pump is pressurized to be greater than 8MPa, and the outlet of the pressurizing pump is connected to the hydraulic motor in one way and to the mixing cavity in another way.

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