阅读说明：本技术 一种煤矸石二氧化碳阻燃装置 (Coal gangue carbon dioxide flame retardant device ) 是由 吴志明 吴江 吴楠 于 2020-09-28 设计创作，主要内容包括：本发明提供一种煤矸石二氧化碳阻燃装置,包括CO-(2)存储罐、排液管路、喷射汇流排管路,CO2存储罐通过排液管路与喷射汇流排管路连接,喷射汇流排管路上连接有多个喷射支路,每个喷射支路上开设有多个喷射孔,所述的喷射支路伸入煤矸石堆内；所述的装置还包括多组用于监测煤矸石堆内温度和含氧量的监测组件。本发明结构简单、实用性强,能够防止煤矸石自燃；通过监测组件准确监测煤矸石堆内的温度和含氧量,当温度和含氧量高于预设值时,通过控制装置自动喷水液体CO-(2),在未着火前将火灾消灭,做到防患于未然；通过将管路设置于煤矸石堆内,并且通过泵与喷嘴相配合,保证液体CO-(2)的喷射范围,同时降低防治成本。(The invention provides a coal gangue carbon dioxide flame retardant device, which comprises CO 2 The system comprises a storage tank, a liquid discharge pipeline and an injection bus-bar pipeline, wherein the CO2 storage tank is connected with the injection bus-bar pipeline through the liquid discharge pipeline, the injection bus-bar pipeline is connected with a plurality of injection branches, each injection branch is provided with a plurality of injection holes, and the injection branches extend into a coal gangue pile; the device also comprises a plurality of groups of monitoring assemblies for monitoring the temperature and the oxygen content in the coal gangue pile. The coal gangue self-ignition device is simple in structure and strong in practicability, and can prevent coal gangue from self-igniting; the temperature and the oxygen content in the coal gangue pile are accurately monitored through the monitoring assembly, and when the temperature and the oxygen content are higher than preset values, liquid CO is automatically sprayed through the control device 2 Before the fire breaks out, the fire disaster is eliminated, and the fire disaster is prevented; the pipeline is arranged in the coal gangue pile, and the pump is matched with the nozzle to ensure liquid CO 2 The spraying range of (2) and the prevention and treatment cost are reduced.)

1. A coal gangue carbon dioxide flame retardant device is characterized in that the device comprises CO₂Storage tank, liquid discharge pipeline and jet confluence pipelineSaid CO₂The storage tank is filled with liquid CO₂，

The CO2 storage tank is connected with a spraying confluence pipeline through a liquid discharge pipeline, the spraying confluence pipeline is connected with a plurality of spraying branches, each spraying branch is provided with a plurality of spraying holes, each spraying hole is provided with a corresponding nozzle, and the spraying branches extend into the coal gangue pile;

the device also comprises a plurality of groups of monitoring assemblies for monitoring the temperature and the oxygen content in the coal gangue pile.

2. The coal gangue carbon dioxide flame retardant device as defined in claim 1, wherein: each group of monitoring assembly comprises at least one temperature probe for detecting the temperature of the coal gangue and at least one oxygen content analyzer for detecting the oxygen content in the coal gangue.

3. The coal gangue carbon dioxide flame retardant device as defined in claim 1, wherein: the liquid discharge pipeline is provided with an automatic switching ball valve and CO₂Plunger pump, said automatic switching ball valve and CO₂The plunger pump is also connected with a plurality of temperature probes and a plurality of oxygen content analyzers through a control end, and the CO₂The plunger pump can pressurize the device, and the automatic switching ball valve can be used for switching liquid CO₂。

4. The coal gangue carbon dioxide flame retardant device as defined in claim 3, wherein: said CO₂Plunger pump and CO₂A CO gas used for introducing gaseous CO is also arranged between the storage tanks₂Feeding back CO₂And storing pipelines in the tank.

5. The coal gangue carbon dioxide flame retardant device as defined in claim 4, wherein: said CO₂The storage tank is also provided with a liquid CO conveying device₂The upper part liquid inlet pipeline and the lower part liquid inlet pipeline, the upper part liquid inlet pipeline and the CO₂The upper end of the storage tank is connected withThe lower liquid inlet pipeline is connected with CO₂The lower part of the storage tank is connected, and the upper liquid inlet pipeline and the lower liquid inlet pipeline are provided with corresponding liquid inlet valves.

6. The coal gangue carbon dioxide flame retardant device as defined in claim 5, wherein: said CO₂And the storage tank is also provided with a vent pipeline, the vent pipeline is provided with a vent valve V10 and a three-way valve V9, and the vent pipeline is also connected with a corresponding safety valve S1 through a three-way valve V9.

7. The coal gangue carbon dioxide flame retardant device as defined in claim 6, wherein: said CO₂The storage tank is also connected with a full measuring pipeline, and the full measuring pipeline is also provided with a full measuring valve V8.

8. The coal gangue carbon dioxide flame retardant device as defined in claim 7, wherein: said CO₂A liquid level measurement pipeline is also arranged on the storage tank, one end of the liquid level measurement pipeline and the CO₂The upper end of the storage tank is connected with the other end of the storage tank and the other end of the storage tank is connected with CO₂The bottom end of the storage tank is connected, and the liquid level measuring pipeline is also provided with an upper liquid valve L1, a lower liquid valve L3 and a balance valve L2.

9. The coal gangue carbon dioxide flame retardant device as defined in claim 8, wherein: said CO₂The storage tank comprises an outer tank and an inner tank, wherein an interlayer is arranged between the outer tank and the inner tank, and the interlayer is a vacuum layer.

10. The coal gangue carbon dioxide flame retardant device as defined in claim 9, wherein: the interlayer is also connected with a vacuum valve through a pipeline.

Technical Field

The invention relates to the technical field of coal gangue treatment equipment, in particular to a coal gangue carbon dioxide flame retardant device.

Background

Spontaneous combustion of coal gangue is a common phenomenon. According to statistics, about one third of waste rock hills in China generate over spontaneous combustion, and serious pollution is caused to the environment of a mining area.

The spontaneous combustion waste rock not only releases a large amount of SO₂、CO₂Also, a large amount of H is released₂S and CO gases, a certain amount of S is also liberated. H₂Pollution ratio of S SO₂The pollution is more serious and is often overlooked by people. And a certain amount of nitrogen oxides, benzopyrene and other harmful substances are also generated in the oxidative decomposition process of the organic matters in the gangue. Benzopyrene is a strong carcinogen produced by incomplete combustion and pyrolysis of coal and coal gangue. The benzopyrene is discharged into the atmosphere in a gas phase or adsorbed in smoke. The water solubility of the soil conditioner is extremely low, and the time required for complete failure in soil is 3-5 years. Spontaneous combustion of the coal gangue not only seriously pollutes the atmosphere, but also has great influence on the health of surrounding residents.

In addition to the above hazards, the gangue accumulation area still has hazards such as gangue explosion and the like.

The current methods of treatment are mainly as follows

1. The method for digging out the fire source is to dig out the ignited gangue to naturally cool the gangue, but the method is only suitable for processing the gangue with small area, but is difficult for large-area spontaneous combustion personnel and equipment to enter a fire area, and has large workload and certain danger for digging out the fire source.

2. The deep hole grouting method is characterized in that a fire extinguishing material is made into fire extinguishing grout with a certain concentration, and the fire extinguishing grout is injected into a gangue dump by using a grouting pump. When the fire-extinguishing slurry contacts with high-temperature gangue, the moisture of the slurry is rapidly evaporated, and simultaneously a large amount of heat is taken away, so that the gangue is rapidly cooled. The method is only suitable for top fire extinguishing, and only can be used for local sealing treatment by a pouring method because a hole can not be drilled on a slope by using a project drilling machine.

3. The foam method is to pour foam extinguishing agent into fire area to isolate oxygen and absorb heat, so as to reduce the temperature of gangue and achieve the purpose of fire extinguishing.

4. The surface sealing method (covering method) generally covers loess and other inert substances on the surface of gangue and tamps the gangue tightly to isolate air and prevent spontaneous combustion, and each gangue with a thickness of about 1 m covers loess with a thickness of about 2m, but the method is only suitable for the prevention of non-ignition, and the method is difficult to ensure that air does not enter the gangue for a long time.

In the prior art, coal gangue is also treated by a water injection method, but the water has duality to the spontaneous combustion of the coal gangue: when the humidity of the gangue is increased to a certain degree, a water-containing liquid film is formed on the surface of the gangue, and the gangue can be prevented from contacting with oxygen, namely, the gangue plays a role in isolating oxygen and inhibiting oxidation. However, when the evaporation of the external moisture of the gangue is reduced to a certain degree, the external moisture of the gangue can be converted into catalytic action from the original inhibition action, thereby promoting the oxidation and spontaneous combustion of the gangue. Meanwhile, the water injection method is limited by water resources and generates a large amount of pollution.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a coal gangue carbon dioxide flame retardant device which can realize the cooling and oxygen isolation of coal gangue and can effectively prevent spontaneous combustion.

The technical scheme of the invention is as follows: a coal gangue carbon dioxide flame retardant device comprises CO₂Storage tank, drain line, injection manifold line, CO₂The storage tank is filled with liquid CO₂，

The CO2 storage tank is connected with the injection confluence pipeline through a liquid discharge pipeline; the coal gangue pile spraying device is characterized in that a liquid discharge valve is further arranged on the liquid discharge pipeline, a plurality of spraying branches are connected on the spraying confluence pipeline, a plurality of spraying holes are formed in each spraying branch, a corresponding nozzle is arranged at each spraying hole, and the spraying branches extend into the coal gangue pile.

Preferably, the device further comprises a plurality of groups of monitoring assemblies, and each group of monitoring assemblies comprises at least one temperature probe for detecting the temperature of the coal gangue and at least one oxygen content analyzer for detecting the oxygen content in the coal gangue.

Preferably, the drain pipeline is provided with an automatic switching ball valve and CO₂Plunger pump, said automatic switching ball valve and CO₂The plunger pump is also connected with a plurality of temperaturesThe measuring probe is connected with a plurality of oxygen content analyzers, and the CO₂The plunger pump can pressurize the system, and the automatic switching ball valve can be used for switching on and off liquid CO₂。

Preferably, said CO is₂The plunger pump is also communicated with CO through a pipeline₂The storage tanks are connected to supply gaseous CO₂Feeding back CO₂And (4) storing the water in the tank.

Preferably, said CO is₂The storage tank is also provided with a liquid CO conveying device₂The upper part liquid inlet pipeline and the lower part liquid inlet pipeline, the upper part liquid inlet pipeline and the CO₂The upper end of the storage tank is connected with the lower part of the liquid inlet pipeline CO₂The lower part of the storage tank is connected, and the upper liquid inlet pipeline and the lower liquid inlet pipeline are provided with corresponding liquid inlet valves.

Preferably, said CO is₂And the storage tank is also provided with a vent pipeline, the vent pipeline is provided with a vent valve V10 and a three-way valve V9, and the vent pipeline is connected with a corresponding safety valve S1 through a three-way valve V9.

Preferably, said CO is₂The storage tank is also connected with a full measuring pipeline, and the full measuring pipeline is also provided with a full measuring valve V8.

Preferably, said CO is₂A liquid level measurement pipeline is also arranged on the storage tank, one end of the liquid level measurement pipeline and the CO₂The upper end of the storage tank is connected with the other end of the storage tank and the other end of the storage tank is connected with CO₂The bottom end of the storage tank is connected, and the liquid level measuring pipeline is also provided with an upper liquid valve L1, a lower liquid valve L3 and a balance valve L2.

Preferably, said CO is₂The storage tank comprises an outer tank and an inner tank, an interlayer is arranged between the outer tank and the inner tank, a vacuum layer is arranged in the interlayer, and the interlayer is further connected with a vacuum valve through a pipeline.

The invention has the beneficial effects that:

1. the coal gangue self-ignition device is simple in structure and strong in practicability, and can prevent coal gangue from self-igniting;

2. the invention accurately monitors the temperature and the oxygen content in the coal gangue pile through the monitoring assembly, and when the temperature and the oxygen content are in the same stateWhen the amount is higher than the preset value, the liquid CO is automatically sprayed by the control device₂Before the fire breaks out, the fire disaster is eliminated, and the fire disaster is prevented;

3. the invention ensures the liquid CO by arranging the pipeline in the coal gangue pile and matching the pump with the nozzle₂The injection range of (1);

4. the device can improve the prevention and treatment effect and reduce the cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the figure, 1-CO₂Storage tank, 2-drainage pipeline, 3-injection busbar pipeline, 4-injection branch, 5-nozzle, 6-temperature probe, 7-oxygen content analyzer, 8-automatic switching ball valve and 9-CO₂Plunger pump, 10-upper part liquid inlet pipeline, 11-lower part liquid inlet pipeline, 12-emptying pipeline, 13-full measuring pipeline and 14-liquid level measuring pipeline.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1, the embodiment provides a coal gangue carbon dioxide flame retardant device, which can cool and isolate oxygen from coal gangue, and can effectively prevent spontaneous combustion.

This example utilizes CO₂The spontaneous combustion of the coal gangue is prevented, and carbon dioxide is one of carbon oxygen compounds, is an inorganic substance, has oxidizability and no reducibility, but has weak oxidizability. It is non-flammable, generally non-flammable, and non-toxic at low concentrations.

The apparatus described in this example comprises a CO₂A storage tank 1, a liquid discharge pipeline 2, a spray busbar pipeline 3, CO₂The storage tank 1 is filled with liquid CO₂CO according to the example₂The storage tank 1 comprises an outer tank and an inner tank, an interlayer is arranged between the outer tank and the inner tank, a vacuum layer is arranged in the interlayer, and the interlayer is further connected with a vacuum valve through a pipeline.

The CO2 storage tank 1 is connected with an injection busbar pipeline 3 through a liquid discharge pipeline 2, and the injection is carried outBe connected with a plurality of injection branches 4 on the busbar pipeline 3, every a plurality of jet orifices have been seted up on the injection branch 4, every jet orifice department be provided with corresponding nozzle 5, injection branch 4 stretch into in the coal gangue heap. In this example, the CO is₂The gas diffusion radius is 12m, so that the extension of the spray branch 4 is realized by the quick coupling in the present embodiment, and a corresponding number of nozzles 5 are arranged according to the actual situation.

Preferably, the device of this embodiment still including setting up the multiunit monitoring subassembly in the coal gangue heap, every group the monitoring subassembly include at least one temperature probe 6 that is used for detecting the coal gangue temperature and at least one oxygen content analysis appearance 7 that is used for detecting the interior oxygen content of coal gangue. The temperature and the oxygen content in the coal gangue pile are accurately monitored in real time through the temperature probe 6 and the oxygen content analyzer 7, and are fed back to a control end, such as a PLC.

Preferably, the drain pipeline 2 of the present embodiment is provided with an automatic switching ball valve 8 and a CO₂Plunger pump 9, said automatic switching ball valve 8 and CO₂The plunger pump 9 is also connected with a plurality of temperature probes 6 and a plurality of oxygen content analyzers 7, and the CO is₂The plunger pump 9 can pressurize the system, and the automatic switching ball valve 8 can be used for switching liquid CO₂. In the embodiment, the temperature and the oxygen content in the monitored coal gangue pile are fed back to a control end, such as a PLC (programmable logic controller), through the temperature probe 6 and the oxygen content analyzer 7. Then the control end can control the automatic switching ball valve 8 and CO according to the preset value₂The plunger pump 9 is operated.

At the same time, liquid CO₂At the time of output, the temperature of the pipeline is relative to liquid CO₂The temperature is high, so that during the transport part of the liquid CO is present₂Will gasify to form gaseous CO₂. Therefore, this example is at CO₂Plunger pump 9 in CO₂Corresponding pipelines are arranged between the storage tanks 1, so that the gaseous CO is introduced₂Feeding back CO₂Storing the tank 1.

Preferably, said CO is₂The storage tank 1 is also provided with a liquid CO input device₂Upper liquid inlet pipe 10 and lower liquid inlet pipe 11, said upper liquid inletLine 10 and CO₂The upper end of the storage tank 1 is connected, and the lower liquid inlet pipeline 11 is connected with CO₂The lower part of the storage tank 1 is connected, and the upper liquid inlet pipeline 10 and the lower liquid inlet pipeline 11 are provided with corresponding liquid inlet valves.

Preferably, said CO is₂The storage tank 1 is also provided with an emptying pipeline 12, the emptying pipeline is provided with an emptying valve V10 and a three-way valve V9, and the emptying pipeline 12 is also connected with a corresponding safety valve S1 through a three-way valve V9.

Preferably, said CO is₂The storage tank 1 is also connected with a full-measuring pipeline 13, and the full-measuring pipeline 13 is also provided with a full-measuring valve V8.

Preferably, said CO is₂A liquid level measuring pipeline 14 is also arranged on the storage tank 1, one end of the liquid level measuring pipeline 14 and the CO₂The upper end of the storage tank 1 is connected, and the other end is connected with CO₂The bottom end of the storage tank 1 is connected, and the liquid level measuring pipeline 14 is also provided with an upper liquid valve L1, a lower liquid valve L3 and a balance valve L2.

The embodiment avoids spontaneous combustion of the coal gangue by reducing the oxygen content and the temperature in the coal gangue pile. When the temperature probe 6 and the oxygen content detection probe distributed in the gangue dump detect the control critical point, the ball valve 8 and the CO are automatically switched by control₂A plunger pump 9 for pumping low-temperature liquid CO₂Conveying the waste rock to a coal and gangue pile so as to reduce the oxygen content and the temperature in the coal and gangue pile, and closing the automatic switching ball valve 8 and the CO when the probe detects that the ambient temperature and the oxygen content of the waste rock are reduced to safety indexes₂A plunger pump 9 and a drain valve on the drain line 2.

The foregoing embodiments and description have been presented only to illustrate the principles and preferred embodiments of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as hereinafter claimed.