CN214464332U - Equipment for inhibiting early oxidation of residual coal in goaf - Google Patents
Equipment for inhibiting early oxidation of residual coal in goaf Download PDFInfo
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- CN214464332U CN214464332U CN202120428091.4U CN202120428091U CN214464332U CN 214464332 U CN214464332 U CN 214464332U CN 202120428091 U CN202120428091 U CN 202120428091U CN 214464332 U CN214464332 U CN 214464332U
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- 239000003245 coal Substances 0.000 title claims abstract description 53
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 33
- 230000003647 oxidation Effects 0.000 title claims abstract description 32
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 9
- 239000007921 spray Substances 0.000 claims abstract description 56
- 239000002002 slurry Substances 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 230000002265 prevention Effects 0.000 claims abstract description 11
- 238000004458 analytical method Methods 0.000 claims abstract description 5
- 238000004537 pulping Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 229910001152 Bi alloy Inorganic materials 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 3
- MPZNMEBSWMRGFG-UHFFFAOYSA-N bismuth indium Chemical compound [In].[Bi] MPZNMEBSWMRGFG-UHFFFAOYSA-N 0.000 claims description 3
- JWVAUCBYEDDGAD-UHFFFAOYSA-N bismuth tin Chemical compound [Sn].[Bi] JWVAUCBYEDDGAD-UHFFFAOYSA-N 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 238000006388 chemical passivation reaction Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract description 14
- 230000002269 spontaneous effect Effects 0.000 abstract description 11
- 238000007569 slipcasting Methods 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 229910000743 fusible alloy Inorganic materials 0.000 abstract 2
- 238000011897 real-time detection Methods 0.000 abstract 1
- 230000001629 suppression Effects 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses equipment for inhibiting the early oxidation of left coal in a goaf, which is characterized in that a conveying pipeline is arranged in advance in the goaf, spray heads are arranged at intervals on the pipeline, fusible alloy and a temperature sensor are arranged at the spray heads, when the left coal oxidation occurs in the goaf, the temperature of a detection space of the temperature sensor rises, and the leakage of air to the goaf is reduced to inhibit the oxidation of coal; if the coal body is continuously oxidized, the fusible alloy is melted due to the increase of the area temperature, and the slurry is injected from the spray head to the high-temperature area to treat early oxidation; after the slip casting, through collecting the analysis gas data still the real-time detection situation of administering, for traditional coal spontaneous combustion fire prevention and extinguishing technique, the utility model discloses oxidation stage before the coal spontaneous combustion takes place, through control air leakage and subsequent fixed point whitewashing, the suppression coal body lasts the oxidation and causes the burning, can accurately judge the high temperature position and in time administer to prevent that the coal of leaving from spontaneous combustion on a large scale, cause wasting of resources and environmental pollution.
Description
Technical Field
The utility model relates to a collecting space area restraines equipment of losing coal early oxidation belongs to colliery fire prevention technical field.
Background
Mine fire is one of the great natural disasters of coal mines, and coal spontaneous combustion is the main cause of mine fire. The development process of a natural coal fire can be generally divided into three phases: the preparation period (namely the temperature is less than 70 ℃), and at the time, the groups in the coal are contacted with the air to generate slow oxidation reaction; in the self-heating period (namely the temperature is 70-350 ℃), the coal body is accelerated to be oxidized during the self-heating period, and a large amount of harmful gas is generated; during the combustion period (i.e., temperatures > 350 ℃), the rate of coal oxidation increases dramatically generating a large amount of heat. Meanwhile, in the preparation period of the natural ignition process of the coal, because slow oxidation occurs, no obvious phenomenon exists, and the goaf is hidden, the oxidation of the residual coal cannot be found in time, so that the optimal stage for controlling the fire is lost.
In general, when the coal is naturally ignited to the self-heating period, the temperature of the area rises to generate a large amount of harmful gas, and the spontaneous combustion of the residual coal in the goaf can be found only by carrying out gas collection and analysis on a closed or drilled position. However, the ignition process of the residual coal reaches the second stage, the coal body is subjected to accelerated oxidation, the temperature rises quickly, natural ignition in a large range is easily caused, gas generated by spontaneous combustion can flow along with air, the ignition position cannot be accurately judged although spontaneous combustion can be found, the spontaneous combustion cannot be accurately controlled and inhibited, and the residual coal is rapidly self-heated to reach the combustion stage to form fire. When the coal body is treated in the stage of self-heating and combustion, the treatment difficulty is increased, and simultaneously, the resource waste and the environmental pollution are caused. Therefore, how to find and determine a specific position in the preparation period of the natural ignition stage of the coal and further take fire prevention and extinguishing measures for the position so as to inhibit spontaneous combustion of the residual coal in the early oxidation stage of the residual coal is a research direction of the industry.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model provides a collecting space area restraines equipment of losing coal early oxidation can be found and confirm concrete position in the preparation phase that the coal is in the natural stage of starting a fire, and then takes the measure of preventing putting out a fire to this position to realize restraineing in the early oxidation stage of losing coal and take place the spontaneous combustion.
In order to realize the purpose, the utility model discloses a technical scheme is: equipment for inhibiting early oxidation of residual coal in a goaf comprises a grouting system, an automatic grouting system, a temperature monitoring system and a gas detection system;
the grouting system comprises a pulping barrel, a pneumatic stirrer, a screw pump and a slurry conveying pipeline, wherein the pneumatic stirrer is arranged in the pulping barrel, the pulping barrel is connected with an inlet of the screw pump through a pipeline, an outlet of the screw pump is connected with one end of the slurry conveying pipeline, and a pressure gauge and a slurry conveying valve are arranged on the slurry conveying pipeline;
the automatic guniting system comprises a main pipeline and a plurality of branch pipelines, one end of each branch pipeline is blocked, the other end of each branch pipeline is connected with one end of the main pipeline, a plurality of spray heads are arranged on each branch pipeline, each spray head consists of a spray pipe and a plurality of nozzles, one end of each spray pipe is blocked, the other end of each spray pipe is connected with each branch pipeline, the plurality of nozzles are distributed on the spray pipes, a fusible plug is arranged in each nozzle, and the positions of the nozzles are sealed through fusible covers; the fusible cover is used for preventing the broken stones on the top plate from falling off and blocking the nozzle, and the fusible plug is used for preventing the slurry in the spray pipe from being sprayed out of the nozzle; the other end of the main pipeline is connected with the other end of the slurry conveying pipeline through a connecting pipe;
the temperature monitoring system comprises a plurality of wireless temperature sensors, a data receiver and a data processor, wherein the data receiver is connected with the data processor through a data transmission line, and each wireless temperature sensor is arranged on one spray head and used for detecting a real-time temperature value of the position of the spray head and sending the detected temperature value through a wireless signal; the data receiver is used for receiving the temperature values sent by the wireless temperature sensors and feeding back the data to the data processor; the data processor analyzes and processes the real-time temperature value and sends out an early warning signal;
the gas detection system comprises a gas analyzer and a gas collector, the gas analyzer and the gas collector are connected through a rubber pipe, when gas detection needs to be carried out, the other end of the main pipeline is disconnected with the other end of the slurry conveying pipeline, then the other end of the main pipeline is connected with the gas collector through a connecting pipe, the gas collector collects gas data through all spray heads of the automatic slurry spraying system, and the gas analyzer carries out analysis processing on the gas data collected by the gas collector.
Further, the fusible cover is made of indium-bismuth alloy, and the melting temperature of the fusible cover is 57 ℃; the fusible plug is made of bismuth-tin alloy, and the melting temperature of the fusible plug is 70 ℃.
Furthermore, the main pipeline and the branch pipelines are all nylon pipes capable of resisting the temperature of 260 ℃.
Furthermore, each spray head is provided with three nozzles which are distributed on the outer circumferential surface of the spray pipe in a staggered mode, and the directions of the nozzles are 45 degrees with the axial direction of the spray pipe.
Compared with the prior art, the utility model discloses a slip casting system, automatic whitewashing system, temperature monitoring system and gas detection system combine together the mode, have following advantage:
(1) the wireless temperature sensors are arranged at the spray heads of all automatic guniting systems, and all the spray heads are uniformly distributed in the area which is easy to spontaneously combust in the goaf, so that the temperature of the area can be monitored in real time, whether coal in the area is oxidized or not and the oxidation condition can be known in real time, if the temperature of a certain area exceeds 40 ℃ and does not reach 70 ℃, the data processor can send out an early warning signal, and workers can reduce air leakage to the goaf by adjusting the air volume in the area and increasing the air leakage resistance, so that the coal in the early oxidation stage can be timely and conveniently intervened;
(2) if the temperature exceeds 70 ℃, the fusible cover and the fusible plug of the current spray head are fused, the fire prevention and extinguishing slurry enters the periphery of the area through the spray head and covers the coal body to treat and oxidize, meanwhile, the spray head can spray the fire prevention and extinguishing slurry to the top plate float coal on the upper part of the goaf, the slurry used according to the field operation condition and the coal body oxidation condition can be selected in various ways, compared with the traditional fire extinguishing technology, the sprayed fire prevention and extinguishing slurry can treat the top plate float coal, the coverage range is wide, and the omnibearing control on the goaf is realized in a more targeted manner;
(3) after grouting is finished, in order to more accurately and comprehensively know the coal oxidation condition in the goaf, a gas collector is connected with a main pipeline, gas can be directly collected by the gas collector for analysis, and only a spray head for grouting is communicated with the inside of the goaf (namely only a fusible cover and a fusible plug of the spray head with the area temperature higher than 70 ℃ are fused, and other spray heads are not communicated), so that the gas collector can collect gas components in the surrounding area, namely the coal oxidation area, and the existing gas collection mode is to collect gas by drilling holes, because the drilling holes cannot accurately reach the high-temperature area for coal oxidation, and meanwhile, the drilling holes have cracks, and the gas can flow under the influence of air leakage, finally the collected gas cannot truly reflect the gas component condition of the high-temperature area; the utility model discloses need not extra construction drilling, directly utilize original slip casting pipeline to can gather the gas that is closest to coal oxidation high temperature region, finally effectively guarantee follow-up gas analysis and reflect the gas composition condition in high temperature region as far as possible.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the sprinkler head of the present invention;
fig. 3 is a schematic view of the fixed connection between the middle branch pipeline and the anchor rod of the present invention.
In the figure: 1. the device comprises a pulping barrel, 2, a pneumatic stirrer, 3, a data transmission line, 4, a screw pump, 5, a pressure gauge, 6, a pulp conveying valve, 7, a pulp conveying pipeline, 8, a gas analyzer, 9, a data processor, 10, a data receiver, 11, a gas collector, 12, a rubber pipe, 13, a spray head, 14, an easily spontaneous combustion goaf, 15, a branch pipeline, 16, an easily-fusible plug, 17, an easily-fusible cover, 18, a wireless temperature sensor, 19, an anchor rod, 20, a pipe discharging clamp, 21, an pipe feeding clamp, 22 and screws.
Detailed Description
The present invention will be further explained below.
As shown in fig. 1 to 3, an apparatus for inhibiting the early oxidation of residual coal in a goaf includes a grouting system, an automatic grouting system, a temperature monitoring system and a gas detection system;
the grouting system comprises a pulping barrel 1, a pneumatic stirrer 2, a screw pump 4 and a slurry conveying pipeline 7, wherein the pneumatic stirrer 2 is arranged in the pulping barrel 1, the pulping barrel 1 is connected with an inlet of the screw pump 4 through a pipeline, an outlet of the screw pump 4 is connected with one end of the slurry conveying pipeline 7, and a pressure gauge 5 and a slurry conveying valve 6 are arranged on the slurry conveying pipeline 7;
the automatic guniting system comprises a main pipeline and a plurality of branch pipelines 15, one end of each branch pipeline 15 is plugged, the other end of each branch pipeline 15 is connected with one end of the main pipeline, a plurality of spray heads 13 are arranged on each branch pipeline 15, each spray head 13 consists of a spray pipe and a plurality of nozzles, one end of each spray pipe is plugged, the other end of each spray pipe is connected with each branch pipeline 15, the plurality of nozzles are distributed on the spray pipes, an fusible plug 16 is arranged inside each nozzle, and the positions of the nozzles are sealed through fusible covers 17; the fusible cover 17 is used for preventing broken stones on the top plate from falling off and blocking the nozzle, and the fusible plug 16 is used for preventing slurry inside the spray pipe from being sprayed out of the nozzle; the other end of the main pipeline is connected with the other end of the slurry conveying pipeline 7 through a connecting pipe;
the temperature monitoring system comprises a plurality of wireless temperature sensors 18, a data receiver 10 and a data processor 9, wherein the data receiver 10 and the data processor 9 are connected through a data transmission line 3, and each wireless temperature sensor 18 is respectively arranged on one spray head 13 and used for detecting a real-time temperature value of the position of the spray head 13 and sending the detected temperature value through a wireless signal; the data receiver 10 is used for receiving the temperature values sent by the wireless temperature sensors 18 and feeding back the data to the data processor 9; the data processor 9 analyzes and processes the real-time temperature value and sends out an early warning signal;
the gas detection system comprises a gas analyzer 8 and a gas collector 11, wherein the gas analyzer 8 and the gas collector 11 are connected through a rubber pipe 12, when gas detection is needed, the other end of the main pipeline is disconnected with the other end of the slurry conveying pipeline 7, then the other end of the main pipeline is connected with the gas collector 11 through a connecting pipe, the gas collector 11 collects gas data through each spray head 13 of the automatic slurry spraying system, and the gas analyzer 8 analyzes and processes the gas data collected by the gas collector 11.
Further, the fusible cover 17 is made of indium-bismuth alloy, and the melting temperature of the fusible cover is 57 ℃; the fusible plug 16 is made of bismuth tin alloy, and the melting temperature is 70 ℃.
Further, the main pipeline and the branch pipelines 15 are all nylon pipes capable of resisting the temperature of 260 ℃.
Further, each spray head 13 has three nozzles, each nozzle is distributed on the outer circumferential surface of the spray pipe in a staggered manner, and the direction of each nozzle is 45 degrees to the axial direction of the spray pipe. The mode can ensure the effect of inhibiting the coal body oxidation to the surrounding area after the fire prevention and extinguishing slurry is sprayed out.
The pulping barrel 1, the pneumatic stirrer 2, the screw pump 4, the pressure gauge 5, the gas analyzer 8, the data receiver 10, the data processor 9, the gas collector 11 and the wireless temperature sensor 18 are all existing devices.
The utility model discloses a concrete working procedure does:
A. the method comprises the following steps of (1) arranging a plurality of anchor rods 19 at the top plate position of a coal mine goaf to be detected, uniformly laying all branch pipelines 15 of an automatic guniting system on an easy natural goaf 14, fixedly connecting all branch pipelines 15 with the anchor rods 19 through lower pipe clamps 20, upper pipe clamps 21 and screws 22, determining the raw material proportion of fire prevention and extinguishing slurry (the fire prevention and extinguishing slurry can be water, yellow mud, inhibition slurry, gel foam and other known materials) according to the actual situation of the coal mine goaf, putting required raw materials into a pulping barrel 1, and starting a pneumatic mixer 2 to prepare the fire prevention and extinguishing slurry; storing the temperature alarm threshold value of 40 ℃ in the data processor 9, thereby completing the preparation work of the equipment;
B. when the mining goaf temperature monitoring system starts to work, each wireless temperature sensor 18 monitors the temperature value of the position in real time and feeds the temperature value back to the data processor 9 through the data receiver, the data processor 9 compares the real-time temperature value with a temperature alarm threshold value, if the real-time temperature value exceeds 40 ℃, the data processor 9 sends out temperature early warning, and at the moment, the staff reduces air leakage to the goaf in a mode of adjusting the air quantity in the area and increasing air leakage resistance; and continuously observing the change situation of the real-time temperature value after adjustment;
C. if the real-time temperature value acquired by a certain wireless temperature sensor 18 exceeds 70 ℃, the fusible cover 17 and the fusible plug 16 of the spray head 13 where the wireless temperature sensor 18 is located are heated and melted, and the slurry conveying valve 6 and the screw pump 4 are opened simultaneously, so that the fire-fighting slurry sequentially passes through the slurry conveying pipeline 7, the main pipeline and the branch pipeline 15 and is injected into the goaf through the nozzle of the current spray head 13, and the oxidation of the coal in the area is inhibited;
D. the current spray head 13 continuously sprays until the temperature value monitored by the wireless temperature sensor 18 is lower than 40 ℃, at the moment, the slurry conveying valve 6 and the screw pump 4 are closed, and the process of inhibiting the coal body oxidation in the area is completed;
E. after the guniting is completed, gas components in the area are detected, the other end of the main pipeline is disconnected with the other end of the slurry conveying pipeline 7, the other end of the main pipeline is connected with the gas collector 11 through a connecting pipe, the gas collector 11 collects gas data in the area through the spray head 13 which completes guniting, and the gas analyzer 8 analyzes and processes the gas data collected by the gas collector 11, so that the gas data condition of coal oxidation in the area is obtained.
Claims (4)
1. The equipment for inhibiting the early oxidation of the residual coal in the goaf is characterized by comprising a grouting system, an automatic guniting system, a temperature monitoring system and a gas detection system;
the grouting system comprises a pulping barrel, a pneumatic stirrer, a screw pump and a slurry conveying pipeline, wherein the pneumatic stirrer is arranged in the pulping barrel, the pulping barrel is connected with an inlet of the screw pump through a pipeline, an outlet of the screw pump is connected with one end of the slurry conveying pipeline, and a pressure gauge and a slurry conveying valve are arranged on the slurry conveying pipeline;
the automatic guniting system comprises a main pipeline and a plurality of branch pipelines, one end of each branch pipeline is blocked, the other end of each branch pipeline is connected with one end of the main pipeline, a plurality of spray heads are arranged on each branch pipeline, each spray head consists of a spray pipe and a plurality of nozzles, one end of each spray pipe is blocked, the other end of each spray pipe is connected with each branch pipeline, the plurality of nozzles are distributed on the spray pipes, a fusible plug is arranged in each nozzle, and the positions of the nozzles are sealed through fusible covers; the other end of the main pipeline is connected with the other end of the slurry conveying pipeline through a connecting pipe;
the temperature monitoring system comprises a plurality of wireless temperature sensors, a data receiver and a data processor, wherein the data receiver is connected with the data processor through a data transmission line, and each wireless temperature sensor is arranged on one spray head and used for detecting a real-time temperature value of the position of the spray head and sending the detected temperature value through a wireless signal; the data receiver is used for receiving the temperature values sent by the wireless temperature sensors and feeding back the data to the data processor; the data processor analyzes and processes the real-time temperature value and sends out an early warning signal;
the gas detection system comprises a gas analyzer and a gas collector, the gas analyzer and the gas collector are connected through a rubber pipe, when gas detection needs to be carried out, the other end of the main pipeline is disconnected with the other end of the slurry conveying pipeline, then the other end of the main pipeline is connected with the gas collector through a connecting pipe, the gas collector collects gas data through all spray heads of the automatic slurry spraying system, and the gas analyzer carries out analysis processing on the gas data collected by the gas collector.
2. The goaf residual coal early oxidation inhibition equipment according to claim 1, wherein the fusible cover is made of indium-bismuth alloy, and the melting temperature of the fusible cover is 57 ℃; the fusible plug is made of bismuth-tin alloy, and the melting temperature of the fusible plug is 70 ℃.
3. The equipment for inhibiting the early oxidation of residual coal in a goaf according to claim 1, wherein the main pipeline and the branch pipelines are nylon pipes capable of resisting the temperature of 260 ℃.
4. The goaf residual coal early oxidation prevention equipment as claimed in claim 1, wherein each spray head has three nozzles, each nozzle is staggered on the outer circumferential surface of the spray pipe, and the direction of each nozzle is 45 ° to the axial direction of the spray pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120428091.4U CN214464332U (en) | 2021-02-26 | 2021-02-26 | Equipment for inhibiting early oxidation of residual coal in goaf |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120428091.4U CN214464332U (en) | 2021-02-26 | 2021-02-26 | Equipment for inhibiting early oxidation of residual coal in goaf |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214464332U true CN214464332U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120428091.4U Expired - Fee Related CN214464332U (en) | 2021-02-26 | 2021-02-26 | Equipment for inhibiting early oxidation of residual coal in goaf |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214464332U (en) |
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2021
- 2021-02-26 CN CN202120428091.4U patent/CN214464332U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211022 |