Grouting fire preventing and extinguishing material based on liquid CO2 and preparation and conveying system thereof

Abstract

The invention discloses a grouting fire preventing and extinguishing material based on liquid CO2 and a preparation and conveying system thereof, the grouting fire preventing and extinguishing material comprises the following components in parts by weight: 100-200 parts of cement, 50-100 parts of rice hull ash, 3-6 parts of an anti-freezing agent, 9-18 parts of liquid CO2 and 91-182 parts of mixing water, and the preparation and conveying system comprises the following components in parts by weight: 100-200 parts of cement, 50-100 parts of rice hull ash, 3-6 parts of the anti-freezing agent, 9-18 parts of liquid CO2 and 91-182 parts of mixing water. The cement, the rice hull ash and the anti-freezing agent are fully mixed to obtain a mixture A, then the liquid CO2 and the mixing water are fully mixed with the obtained mixture A to obtain a mixture B, and the mixture B is the grouting fire preventing and extinguishing material. According to the grouting fire preventing and extinguishing material disclosed by the invention, few types of materials need to be prepared, the preparation process is simple, the preparation efficiency is high, the fire extinguishing effect is strong, the automation degree is high, liquid CO2 volatilized in the preparation process can be collected and recycled, and the fire extinguishing cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine fire prevention and extinguishing, and in particular to a grouting fire prevention and extinguishing material based on liquid CO2 and a preparation and conveying system thereof. Background Art

[0002] Fires caused by spontaneous combustion of coal can cause economic losses, environmental pollution and casualties, seriously threatening the normal production of coal mines. At present, inert gas and foam fire-fighting materials are widely used to prevent and control spontaneous combustion of coal fires. However, inert gases mainly composed of nitrogen (N2) and carbon dioxide (CO2) have problems such as low specific heat, low concentration, poor stability and long fire-fighting cycle. At present, there are still certain defects in the fire-fighting of inert gas, and the application effect needs to be improved: First, inert gas is not easy to stay in the coal mine goaf, cannot cover the surface of combustibles for a long time, and has poor oxygen isolation; secondly, it takes a long time for inert gas to extinguish the fire, and the fire source cannot be cut off immediately; in addition, inert gas is asphyxiating, and excessive concentration will affect the health of underground workers and cause safety problems. Based on this, on the basis of studying the characteristics of mine fire areas and the inherent requirements of fire-fighting materials, how to improve the refrigeration and cooling capacity and stability of fire-fighting materials, reduce the economic cost of fire extinguishing, and at the same time improve the intelligence of the preparation and transportation system has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, one purpose of the present invention is to propose a grouting fire-proofing material based on liquid CO2, which aims to solve the problems that inert gas is not easy to stay in the goaf of coal mines, cannot cover the surface of combustibles for a long time, and has poor oxygen isolation; secondly, it takes a long time to extinguish the fire with inert gas, and the fire source cannot be cut off immediately; in addition, inert gas is asphyxiating, and too high a concentration will affect the health of underground workers and cause safety problems.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A liquid CO2-based grouting fire extinguishing material comprises cement, rice husk ash, antifreeze agent, liquid CO2 and mixing water, wherein the cement is 100-200 parts by weight, the rice husk ash is 50-100 parts by weight, the antifreeze agent is 3-6 parts by weight, the liquid CO2 is 9-18 parts by weight, and the mixing water is 91-182 parts by weight.

[0006] The cement, rice husk ash and antifreeze agent are fully mixed to obtain a mixture A.

[0007] The liquid CO2 and mixing water are fully mixed with the obtained mixture A to obtain a mixture B, and the mixture B is the grouting fire extinguishing material.

[0008] Furthermore, the antifreeze agent is sodium chloride or calcium chloride, the cement is silicate cement, and the mesh size of the rice husk ash is 80-120 meshes.

[0009] Furthermore, the liquid CO2 and the mixing water are mixed with the obtained mixture A by stirring, the stirring speed is 400-600 r / min, and the stirring time is 3 minutes.

[0010] Another object of the present invention is to provide a preparation and delivery system for grouting fire extinguishing materials based on liquid CO2.

[0011] A preparation and delivery system for grouting fire extinguishing materials based on liquid CO2, comprising a liquid CO2 storage tank, a first pipeline, a first detection unit, a mixture A preparation unit, a mixture A storage tank, a water storage tank, a stirring tank, a mixture B storage tank, a CO2 adsorption pretreatment unit, a temporary storage tank and an industrial computer, wherein one end of the first pipeline is connected to the outlet end of the liquid CO2 storage tank, and the other end thereof is connected to the mixture A storage tank, the first detection unit is arranged on the first pipeline, and the first detection unit is communicatively connected to the industrial computer.

[0012] The outlet end of the mixture A preparation unit is connected to the inlet end pipeline of the mixture A storage tank, the water storage tank is connected to the mixture A storage tank pipeline, and the mixing water in the water storage tank is quantitatively pumped to the mixture A storage tank.

[0013] The outlet end of the mixture A storage tank is connected to the inlet end pipeline of the upper part of the mixing tank, and the outlet end of the bottom of the mixing tank is connected to the inlet end pipeline of the mixture B storage tank. The outlet end of the mixture B storage tank is connected to the grouting delivery pipe, and the first electromagnetic gate valve and the delivery pump are sequentially arranged on the grouting delivery pipe.

[0014] The CO2 adsorption pretreatment unit includes a second pipeline, an adsorption tower, a compressor and a shell and tube heat exchanger. One end of the second pipeline is connected to the top pipeline of the stirring tank, and the other end is connected to a temporary storage tank. The adsorption tower, the compressor and the shell and tube heat exchanger are connected in series on the second pipeline in the order from the stirring tank to the temporary storage tank.

[0015] A three-way solenoid valve is provided on the first pipeline, one outlet and one inlet of the three-way solenoid valve are connected to the first pipeline, and the other inlet is connected to the outlet end of the temporary storage tank through the third pipeline. A second detection unit is provided on the third pipeline, and the second detection unit and the three-way solenoid valve are respectively connected to the industrial computer for communication.

[0016] Furthermore, the mixture A preparation unit includes a cement storage tank, a rice husk ash storage tank, an antifreeze storage tank and a mixer, the mixer includes a sealed shell and a stirring mechanism, the bottoms of the cement storage tank, the rice husk ash storage tank and the antifreeze storage tank are respectively connected to the top inlet of the sealed shell through pipes, and each pipe is provided with a discharge valve with a metering function.

[0017] The stirring mechanism includes a stepper motor, a stirring shaft and a stirring impeller. The stepper motor is installed on the top of the sealed shell. The stirring shaft is vertically arranged inside the sealed shell. Its upper end is coaxially fixedly connected to the output shaft of the stepper motor. The stirring impeller is installed at the lower end of the stirring shaft.

[0018] Furthermore, a second electromagnetic gate valve is provided at the bottom of the mixer, and an outlet end of the second electromagnetic gate valve is connected to the upper part of the mixture A storage tank through a tubular screw conveyor.

[0019] The stirring tank adopts a high-pressure resistant tank body, and is internally provided with a stirring mechanism identical to that inside a mixer. A third electromagnetic gate valve is installed at the bottom of the mixture A storage tank, and the outlet end of the third electromagnetic gate valve is connected to the upper part of the stirring tank through the same tubular screw conveyor.

[0020] Furthermore, the outlet end of the water storage tank is connected to the upper part of the mixture A storage tank through a fourth pipeline, and an electromagnetic pump and a flow valve are provided on the fourth pipeline, and the electromagnetic pump and the flow valve are respectively connected to the industrial computer for communication.

[0021] A fourth electromagnetic gate valve is arranged at the bottom of the stirring tank, and an outlet end of the third electromagnetic gate valve is connected to the upper part of the mixture B storage tank through another tubular screw conveyor.

[0022] Furthermore, a fifth electromagnetic gate valve is provided on the second pipeline, and the fifth electromagnetic gate valve is located between the mixture B storage tank and the adsorption tower, and the outlet of the adsorption tower is connected to the inlet of the compressor.

[0023] The shell and tube heat exchanger is equipped with a refrigeration unit, which is connected to the shell side of the shell and tube heat exchanger to form a refrigeration cycle system. The tube side inlet of the shell and tube heat exchanger is connected to the outlet of the compressor, and its tube side inlet is connected to the inlet end of the temporary storage tank through a second pipeline.

[0024] Furthermore, the three-way solenoid valve adopts a three-position three-way solenoid valve, and the first detection unit includes a first flow meter and a first pressure sensor arranged on the first pipeline. The first flow meter and the first pressure sensor are located between the liquid CO2 storage tank and the three-way solenoid valve, and their signal ends are respectively connected to the industrial computer for communication.

[0025] Furthermore, the temporary storage tank is provided with two liquid level gauges, which are arranged on the inner side of the temporary storage tank, one high and one low, and whose signal ends are respectively connected to the industrial control computer for communication.

[0026] The second detection unit includes a flow control valve, a second flow meter and a second pressure sensor. The flow control valve, the second flow meter and the second pressure sensor are sequentially arranged on the third pipeline, and their signal ends are respectively connected to the industrial computer for communication.

[0027] By adopting the above technical solution, the beneficial technical effects of the present invention are:

[0028] 1. The grouting fire extinguishing material of the present invention requires fewer types of materials for preparation and has a simple preparation process, which greatly improves preparation efficiency and reduces preparation costs.

[0029] 2. The grouting fire-proofing material of the present invention has a good fire-extinguishing effect, can quickly extinguish a fire and form a protective layer, and the grouting fire-extinguishing material of the present invention has high stability, and the formed fire-proof layer has strong durability, and can maintain the isolation and fire-extinguishing effect of the fire source for a long time. In addition, the grouting fire-proofing material of the present invention is safe to use and will not cause harm to personnel.

[0030] 3. The preparation and delivery system of the present invention has a high degree of automation, and can prepare and deliver grouting fire extinguishing materials, extinguish fires accurately and timely, and avoid delaying the best time to extinguish fires. In addition, the preparation and delivery system can collect and recycle the liquid CO2 volatilized during the preparation process, greatly reducing the cost of fire extinguishing.

[0031] 4. The preparation and delivery system of the present invention can detect and process the circulated liquid CO2 to ensure that the circulated liquid CO2 meets the use requirements and has high safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the preparation and delivery system of grouting fire extinguishing materials based on liquid CO2 of the present invention.

[0033] As shown in the figure: 1. Liquid CO2 storage tank; 11. First pipeline; 12. Three-way solenoid valve; 2. Mixture A storage tank; 21. Third solenoid gate valve; 3. Water storage tank; 31. Fourth pipeline; 32. Solenoid pump; 33. Flow valve; 4. Stirring tank; 41. Fourth solenoid gate valve; 5. Mixture B storage tank; 51. Grouting delivery pipe; 52. First solenoid gate valve; 53. Delivery pump; 6. Temporary storage tank; 61. Cement storage tank; 62. Rice husk ash storage tank; 63. Antifreeze storage tank; 64. Mixer; 65. Second solenoid gate valve; 71. Second pipeline; 72. Adsorption tower; 73. Compressor; 74. Shell and tube heat exchanger; 75. Fifth solenoid gate valve; 81. First flow meter; 82. First pressure sensor; 9. Third pipeline; 91. Flow control valve; 92. Second flow meter; 93. Second pressure sensor. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with the accompanying drawings:

[0035] Example 1, a liquid CO2-based grouting fire extinguishing material, including cement, rice husk ash, antifreeze, liquid CO2 and mixing water, the cement is calculated in parts by weight at 100-200 parts, the rice husk ash is calculated in parts by weight at 50-100 parts, the antifreeze is calculated in parts by weight at 3-6 parts, the liquid CO2 is calculated in parts by weight at 9-18 parts, and the mixing water is calculated in parts by weight at 91-182 parts.

[0036] The antifreeze agent is sodium chloride or calcium chloride, the cement is silicate cement, the mesh number of the rice husk ash is 80-120 meshes, and the cement, rice husk ash and antifreeze agent are fully mixed to obtain a mixture A.

[0037] Afterwards, the liquid CO2 and the mixing water are fully mixed with the obtained mixture A to obtain a mixture B, which is the grouting fire extinguishing material. The liquid CO2 and the mixing water are fully mixed with the obtained mixture A by stirring, and the cement, rice husk ash and antifreeze agent are also fully mixed by stirring. The stirring speed used in the preparation process of mixture A and mixture B is 400-600 r / min, and the stirring time is 3 minutes.

[0038] Embodiment 2, combined Figure 1 A preparation and delivery system for grouting fire extinguishing materials based on liquid CO2, including a liquid CO2 storage tank 1, a first pipeline 11, a first detection unit, a mixture A preparation unit, a mixture A storage tank 2, a water storage tank 3, a stirring tank 4, a mixture B storage tank 5, a CO2 adsorption pretreatment unit, a temporary storage tank 6 and an industrial computer. The liquid CO2 storage tank 1 adopts a high-pressure tank body with an outer wall having a heat insulation layer, and the prepared high-pressure liquid CO2 is stored in it.

[0039] One end of the first pipeline 11 is connected to the outlet end of the liquid CO2 storage tank 1, and the other end thereof is connected to the mixture A storage tank 2. The first detection unit is arranged on the first pipeline 11. The first pipeline 11 is provided with a sixth solenoid gate valve 13. The sixth solenoid gate valve 13 is located between the first detection unit and the outlet end of the liquid CO2 storage tank 1. The signal end of the sixth solenoid gate valve 13 and the first detection unit are respectively connected to the industrial computer for communication. The sixth solenoid gate valve 13 opens and closes the outlet of the liquid CO2 storage tank 1 according to the instruction of the industrial computer, so as to control the high-pressure liquid CO2 to be supplied into the mixture A storage tank 2 through the first pipeline 11.

[0040] A three-way solenoid valve 12 is installed on the first pipeline 11, and the three-way solenoid valve 12 is located between the first detection unit and the mixture A storage tank 2. Specifically, the three-way solenoid valve 12 adopts a three-position three-way solenoid valve with two inlets and one outlet. The signal end of the three-position three-way solenoid valve is communicatively connected to the industrial computer. One outlet and one inlet of the three-way solenoid valve 12 are connected to the first pipeline 11, and the other inlet is connected to the outlet end of the temporary storage tank 6 through the third pipeline 9. The liquid inside the temporary storage tank 6 can be supplied to the mixture A storage tank 2 through the third pipeline 9 and the three-way solenoid valve 12. A second detection unit is provided on the third pipeline 9, and the second detection unit and the three-way solenoid valve 12 are respectively communicatively connected to the industrial computer.

[0041] The first detection unit includes a first flow meter 81 and a first pressure sensor 82 arranged on the first pipeline 11. The first flow meter 81 and the first pressure sensor 82 are located between the liquid CO2 storage tank 1 and the three-way solenoid valve 12, and their signal ends are respectively connected to the industrial computer for communication. During the process of internally transporting liquid CO2 on the first pipeline 11, the first pressure sensor 82 monitors the pressure inside the first pipeline 11 in real time and sends the monitoring data to the industrial computer. The first flow meter 81 records the amount of liquid CO2 transported to the mixture A storage tank 2 through the first pipeline 11, and sends the data of the transported liquid CO2 to the industrial computer.

[0042] The second detection unit includes a flow control valve 91, a second flow meter 92 and a second pressure sensor 93. The flow control valve 91, the second flow meter 92 and the second pressure sensor 93 are sequentially arranged on the third pipeline 9, and their signal ends are respectively connected to the industrial computer for communication. The flow control valve 91 can control and adjust the flow of liquid CO2 in the third pipeline 9 according to the instructions of the industrial computer, the second flow meter 92 records the amount of liquid CO2 delivered to the mixture A storage tank 2 through the inside of the third pipeline 9, and sends the data of the delivered liquid CO2 to the industrial computer, and the second pressure sensor 93 monitors the pressure inside the third pipeline 9 in real time, and stops the delivery of liquid CO2 in the third pipeline 9 when an abnormal situation occurs.

[0043] The outlet end of the mixture A preparation unit is connected to the inlet end pipeline of the mixture A storage tank 2, the water storage tank 3 is connected to the mixture A storage tank 2 pipeline, and the mixing water in the water storage tank 3 is quantitatively pumped to the mixture A storage tank 2.

[0044] Specifically, the mixture A preparation unit includes a cement storage tank 61, a rice husk ash storage tank 62, an antifreeze storage tank 63 and a mixer 64. The mixer 64 includes a sealed shell and a stirring mechanism. The bottoms of the cement storage tank 61, the rice husk ash storage tank 62 and the antifreeze storage tank 63 are respectively connected to the top inlet of the sealed shell through pipelines. A discharge valve with a metering function is respectively arranged on each pipeline. The signal end of the discharge valve is communicated with the industrial control computer. The industrial control computer controls each discharge valve through instructions to quantitatively supply cement, rice husk ash and antifreeze into the sealed shell of the mixer 64.

[0045] The stirring mechanism includes a stepper motor, a stirring shaft and a stirring impeller. The stepper motor is installed on the top of the sealed shell. The stirring shaft is vertically arranged inside the sealed shell, and its upper end is coaxially fixedly connected to the output shaft of the stepper motor. The stirring impeller is installed at the lower end of the stirring shaft. The stepper motor drives the stirring impeller to rotate at a constant speed through the stirring shaft to fully stir the cement, rice husk ash and antifreeze supplied into the sealed shell so that they are evenly mixed to form the mixture A described in Example 1.

[0046] The interior of the water storage tank 3 is filled with mixing water, and its outlet end is connected to the upper part of the mixture A storage tank 2 through the fourth pipeline 31. The fourth pipeline 31 is provided with an electromagnetic pump 32 and a flow valve 33. The electromagnetic pump 32 and the flow valve 33 are respectively connected to the industrial computer for communication. The industrial computer controls the electromagnetic pump 32 to start and stop through instructions, and quantitatively delivers the mixing water in the water storage tank 3 to the sealed shell of the stirring mechanism to mix with the mixture A. The flow valve 33 measures the weight of the mixing water supplied to the sealed shell. At the same time, the liquid CO2 supplied by the three-way electromagnetic valve 12 is also transported into the mixer 64.

[0047] The outlet of the mixture A storage tank 2 is connected to the inlet pipeline of the upper part of the stirring tank 4, and the outlet of the bottom of the stirring tank 4 is connected to the inlet pipeline of the mixture B storage tank 5. The outlet of the mixture B storage tank 5 is connected to a grouting delivery pipe 51, and the grouting delivery pipe 51 is sequentially provided with a first electromagnetic gate valve 52 and a delivery pump 53. The signal ends of the first electromagnetic gate valve 52 and the delivery pump 53 are respectively connected to the industrial control computer for communication. During use, the first electromagnetic gate valve 52 is opened, and the delivery pump 53 delivers the mixture B prepared in the mixture B storage tank 5 to the natural coal area underground through the grouting delivery pipe 51. The mixture B is sprayed on the surface of the natural coal area through the spray head connected to the end of the grouting delivery pipe 51, covering the surface of the natural coal and isolating it from the contact surface with the air. The liquid CO2 in the mixture B will become gaseous after being heated, volatilize from the mixture B and remain on the surface of the mixture B, further isolating the air and preventing the natural coal from further spreading. The liquid CO2 absorbs heat during the volatilization process, which can also play a certain fire extinguishing effect.

[0048] Specifically, a second electromagnetic gate valve 65 is installed at the bottom of the sealed housing of the mixer 64, and the outlet end of the second electromagnetic gate valve 65 is connected to the upper part of the mixture A storage tank 2 through a tubular screw conveyor. The signal end of the second electromagnetic gate valve 65 is connected to the industrial computer for communication, and the industrial computer controls the opening and closing of the second electromagnetic gate valve 65 through instructions. After the cement, rice husk ash and antifreeze are fully mixed in the mixer 64, the second electromagnetic gate valve 65 is opened, and the mixture A is sent to the mixture A storage tank 2 for temporary storage through the tubular screw conveyor. After that, the second electromagnetic gate valve 65 is closed, and cement, rice husk ash and antifreeze are quantitatively added to the mixer 64 again to prepare the next batch of mixture A.

[0049] A third electromagnetic gate valve 21 is installed at the bottom of the mixture A storage tank 2, and the outlet end of the third electromagnetic gate valve 21 is connected to the upper part of the mixing tank 4 through the same tubular screw conveyor. The mixing tank 4 adopts a high-pressure resistant tank body, and is provided with a stirring mechanism same as that in the mixer 64. A fourth electromagnetic gate valve 41 is provided at the bottom of the mixing tank 4, and the outlet end of the third electromagnetic gate valve 41 is connected to the upper part of the mixture B storage tank 5 through another tubular screw conveyor.

[0050] The industrial computer controls the third electromagnetic gate valve 21 to open through instructions, and delivers the mixture A, mixing water and liquid CO2 to the inside of the tank of the stirring tank 4 through the tubular screw conveyor under the mixture A storage tank 2, and stirs them evenly to prepare the mixture B, and then delivers the prepared mixture B to the mixture B storage tank 5 through the tubular screw conveyor under the stirring tank 4 for temporary storage.

[0051] The CO2 adsorption pretreatment unit includes a second pipeline 71, an adsorption tower 72, a compressor 73 and a shell and tube heat exchanger 74. One end of the second pipeline 71 is connected to the top pipeline of the stirring tank 4, and the other end is connected to the temporary storage tank 6. The adsorption tower 72, the compressor 73 and the shell and tube heat exchanger 74 are connected in series on the second pipeline 71 in the order from the stirring tank 4 to the temporary storage tank 6.

[0052] The second pipeline 71 is provided with a fifth electromagnetic gate valve 75 , which is located between the mixture B storage tank 5 and the adsorption tower 72 , and the outlet of the adsorption tower 72 is connected to the inlet of the compressor 73 .

[0053] The shell and tube heat exchanger 74 is equipped with a refrigeration unit, which is connected to the shell side of the shell and tube heat exchanger 74 to form a refrigeration cycle system. The tube side inlet of the shell and tube heat exchanger 74 is connected and communicated with the outlet of the compressor 73, and the tube side inlet is connected and communicated with the inlet end of the temporary storage tank 6 through the second pipeline 71. The refrigeration unit cools the inside of the shell and tube heat exchanger 74 and cools down the high-temperature and high-pressure gaseous CO2 passing through the shell and tube heat exchanger 74 to form liquid CO2.

[0054] During the stirring process of the mixture A, mixing water and liquid CO2 in the stirring tank 4, a small amount of liquid CO2 will be converted into gaseous CO2 and be located in the upper part of the tank body of the stirring tank 4. The gaseous CO2 enters the adsorption tower 72 through the second pipeline 71 for collection, and enters the compressor 73 for compression to form high-temperature and high-pressure gaseous CO2. After that, the high-temperature and high-pressure gaseous CO2 passes through the shell and tube heat exchanger 74 to become liquid CO2, and enters the temporary storage tank 6 through the second pipeline 71 for collection and reuse.

[0055] The temporary storage tank 6 is provided with two liquid level gauges 61, one high and one low, arranged inside the temporary storage tank 6, and their signal ends are respectively connected to the industrial computer for communication. The temporary storage tank 6 collects and stores the collected liquid CO2, and the two liquid level gauges 61 are used to detect the liquid level of the liquid CO2 inside the temporary storage tank 6. During operation, when the liquid level of liquid CO2 in the temporary storage tank 6 reaches the upper liquid level gauge 61, the three-way solenoid valve 12 controls only the temporary storage tank 6 to supply liquid CO2 into the mixture A storage tank 2; when the liquid level of liquid CO2 in the temporary storage tank 6 reaches the lower liquid level gauge 61, the temporary storage tank 6 stops supplying liquid CO2 into the mixture A storage tank 2, and starts supplying liquid CO2 into the mixture A storage tank 2 from the liquid CO2 storage tank 1, and the three-way solenoid valve 12 switches the supply of liquid CO2 from the liquid CO2 storage tank 1 or the temporary storage tank 6, and controls the amount of liquid CO2 added to the mixture A storage tank 2 through the flowmeter.

[0056] Parts not described in the present invention can be implemented by adopting or drawing on existing technologies.

[0057] Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0058] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0059] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A grouting fire extinguishing material based on liquid CO2, characterized in that: Comprising cement, rice husk ash, antifreeze agent, liquid CO2 and mixing water, wherein the cement is 100 to 200 parts by weight, the rice husk ash is 50 to 100 parts by weight, the antifreeze agent is 3 to 6 parts by weight, the liquid CO2 is 9 to 18 parts by weight, and the mixing water is 91 to 182 parts by weight; The cement, rice husk ash and antifreeze agent are fully mixed to obtain a mixture A; The liquid CO2 and mixing water are fully mixed with the obtained mixture A to obtain a mixture B, and the mixture B is the grouting fire extinguishing material.

2. A grouting fire extinguishing material based on liquid CO2 according to claim 1, characterized in that: The antifreeze agent is sodium chloride or calcium chloride, the cement is silicate cement, and the mesh number of the rice husk ash is 80-120 meshes.

3. A grouting fire extinguishing material based on liquid CO2 according to claim 1, characterized in that: The liquid CO2 and mixing water are mixed with the obtained mixture A by stirring, the stirring speed is 400-600 r / min, and the stirring time is 3 minutes.

4. A preparation and delivery system for grouting fire extinguishing materials based on liquid CO2 as claimed in any one of claims 1 to 3, characterized in that: It includes a liquid CO2 storage tank, a first pipeline, a first detection unit, a mixture A preparation unit, a mixture A storage tank, a water storage tank, a stirring tank, a mixture B storage tank, a CO2 adsorption pretreatment unit, a temporary storage tank and an industrial computer, one end of the first pipeline is connected to the outlet end of the liquid CO2 storage tank, and the other end is connected to the mixture A storage tank. The first detection unit is arranged on the first pipeline, and the first detection unit is connected to the industrial computer for communication; The outlet of the mixture A preparation unit is connected to the inlet pipeline of the mixture A storage tank, the water storage tank is connected to the pipeline of the mixture A storage tank, and the mixing water in the water storage tank is quantitatively pumped to the mixture A storage tank; The outlet of the mixture A storage tank is connected to the inlet pipeline of the upper part of the mixing tank, and the outlet of the bottom of the mixing tank is connected to the inlet pipeline of the mixture B storage tank. The outlet of the mixture B storage tank is connected to a grouting delivery pipe, and the grouting delivery pipe is sequentially provided with a first electromagnetic gate valve and a delivery pump; The CO2 adsorption pretreatment unit includes a second pipeline, an adsorption tower, a compressor and a shell-and-tube heat exchanger, one end of the second pipeline is connected to the top pipeline of the stirring tank, and the other end is connected to the temporary storage tank, and the adsorption tower, the compressor and the shell-and-tube heat exchanger are connected in series on the second pipeline in the order from the stirring tank to the temporary storage tank; A three-way solenoid valve is provided on the first pipeline, one outlet and one inlet of the three-way solenoid valve are connected to the first pipeline, and the other inlet is connected to the outlet end of the temporary storage tank through the third pipeline. A second detection unit is provided on the third pipeline, and the second detection unit and the three-way solenoid valve are respectively connected to the industrial computer for communication.

5. The preparation and delivery system of grouting fire extinguishing material according to claim 4 is characterized in that: The mixture A preparation unit comprises a cement storage tank, a rice husk ash storage tank, an antifreeze storage tank and a mixer, the mixer comprises a sealed shell and a mixing mechanism, the bottoms of the cement storage tank, the rice husk ash storage tank and the antifreeze storage tank are respectively connected to the top inlet of the sealed shell through pipelines, and each pipeline is respectively provided with a discharge valve with a metering function; The stirring mechanism includes a stepper motor, a stirring shaft and a stirring impeller. The stepper motor is installed on the top of the sealed shell. The stirring shaft is vertically arranged inside the sealed shell. Its upper end is coaxially fixedly connected to the output shaft of the stepper motor. The stirring impeller is installed at the lower end of the stirring shaft.

6. The preparation and delivery system of grouting fire extinguishing material according to claim 5, characterized in that: A second electromagnetic gate valve is provided at the bottom of the mixer, and an outlet end of the second electromagnetic gate valve is connected to the upper part of the mixture A storage tank through a tubular screw conveyor; The stirring tank adopts a high-pressure resistant tank body, and is internally provided with a stirring mechanism identical to that inside a mixer. A third electromagnetic gate valve is installed at the bottom of the mixture A storage tank, and the outlet end of the third electromagnetic gate valve is connected to the upper part of the stirring tank through the same tubular screw conveyor.

7. The preparation and delivery system of grouting fire extinguishing material according to claim 6, characterized in that: The outlet end of the water storage tank is connected to the upper part of the mixture A storage tank through a fourth pipeline, and an electromagnetic pump and a flow valve are arranged on the fourth pipeline, and the electromagnetic pump and the flow valve are respectively connected to the industrial computer for communication; A fourth electromagnetic gate valve is arranged at the bottom of the stirring tank, and an outlet end of the third electromagnetic gate valve is connected to the upper part of the mixture B storage tank through another tubular screw conveyor.

8. The preparation and delivery system of grouting fire extinguishing material according to claim 4, characterized in that: The second pipeline is provided with a fifth electromagnetic gate valve, which is located between the mixture B storage tank and the adsorption tower, and the outlet of the adsorption tower is connected to the inlet of the compressor; The shell and tube heat exchanger is equipped with a refrigeration unit, which is connected to the shell side of the shell and tube heat exchanger to form a refrigeration cycle system. The tube side inlet of the shell and tube heat exchanger is connected to the outlet of the compressor, and its tube side inlet is connected to the inlet end of the temporary storage tank through a second pipeline.

9. The preparation and delivery system of grouting fire extinguishing material according to claim 4, characterized in that: The three-way solenoid valve adopts a three-position three-way solenoid valve. The first detection unit includes a first flow meter and a first pressure sensor arranged on the first pipeline. The first flow meter and the first pressure sensor are located between the liquid CO2 storage tank and the three-way solenoid valve, and their signal ends are respectively connected to the industrial computer for communication.

10. The preparation and delivery system of grouting fire extinguishing material according to claim 4, characterized in that: The temporary storage tank is provided with two liquid level gauges, one high and one low, arranged inside the temporary storage tank, and the signal end of each liquid level gauge is respectively connected to the industrial control computer for communication; The second detection unit includes a flow control valve, a second flow meter and a second pressure sensor. The flow control valve, the second flow meter and the second pressure sensor are sequentially arranged on the third pipeline, and their signal ends are respectively connected to the industrial computer for communication.

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