阅读说明：本技术 一种寒冷地区煤仓加热防冻方法 (Heating and anti-freezing method for coal bunker in cold area ) 是由 秦文露 秦征凡 于 2019-08-02 设计创作，主要内容包括：本发明公开了一种寒冷地区煤仓加热防冻方法,它是在煤仓顶部安装微波管,在煤仓侧壁周圈上预埋金属板,并用混凝土将其覆盖,在煤仓上部安装红外线温度探测器和温控器,探测器的信号电缆接在温控器的信号输入端,温控器的控制端与微波管电源电连接。工作时,设置好探测器测量时间,每隔一段时间对煤仓中的煤炭发射红外线进行测温,温度低于设定温度,微波管开始,高于设定温度,微波管停止发射微波能。本发明通过采用微波加热防冻技术,与传统的蒸汽加热管道或碳纤维加热电缆防冻技术相比,具有更好的穿透性,使整个煤仓内的储煤同时升高温度,无需由外到内进行加热,可以有效的缩短加热时间,保证了煤仓的稳定使用。(The invention discloses a coal bunker heating and anti-freezing method in cold areas, which is characterized in that a microwave tube is arranged on the top of a coal bunker, a metal plate is embedded on the periphery of the side wall of the coal bunker and covered by concrete, an infrared temperature detector and a temperature controller are arranged on the upper part of the coal bunker, a signal cable of the detector is connected with a signal input end of the temperature controller, and a control end of the temperature controller is electrically connected with a power supply of the microwave tube. When the microwave oven works, the detector is set to measure the time, the infrared rays emitted by coal in the coal bunker are measured at intervals, the temperature is lower than the set temperature, the microwave tube starts to emit microwave energy, and the microwave tube stops emitting microwave energy. By adopting the microwave heating anti-freezing technology, compared with the traditional steam heating pipeline or carbon fiber heating cable anti-freezing technology, the coal storage device has better penetrability, the temperature of the coal stored in the whole coal bunker is increased at the same time, the heating from outside to inside is not needed, the heating time can be effectively shortened, and the stable use of the coal bunker is ensured.)

1. A coal bunker heating and anti-freezing method in cold areas is characterized by comprising the following measures

Firstly, the method comprises the following steps: 4-8 groups of microwave tubes are arranged at the top of the coal bunker, microwaves emitted by the microwave tubes can activate water molecules contained in the stored coal, so that the stored coal is heated from inside to outside, and the larger the water content of the stored coal is, the larger the heating value is;

secondly, the method comprises the following steps: the metal plates are pre-embedded on the periphery of the side wall of the coal bunker and are covered by concrete, so that microwave energy can be effectively reflected, the reflected microwave energy is provided for coal storage again, and meanwhile, the radiation pollution to the surrounding environment caused by microwave leakage is prevented;

thirdly, the method comprises the following steps: in order to prevent the coal bunker from spontaneous combustion caused by overhigh temperature, an infrared temperature detector and a temperature controller are required to be installed on the upper part of the coal bunker, a signal cable of the detector is connected with a signal input end of the temperature controller, a control end of the temperature controller is electrically connected with a microwave tube power supply, the measurement time of the detector is set, and the infrared rays emitted by the coal in the coal bunker are measured at intervals;

fourthly: setting the temperature interval of the infrared temperature detector to be 10-50 ℃, when the temperature of the coal stored in the coal bunker is reduced to a set minimum temperature value, sending a starting instruction by the temperature controller, controlling the microwave tube to start emitting microwaves, enabling the coal stored to generate self-heating under the influence of self-moisture, and unfreezing and heating the frozen and sticky coal stored in the coal bunker; when the temperature of the coal stored in the coal bunker reaches the set highest temperature value, the temperature controller sends out a closing instruction to control the microwave tube to stop emitting microwaves, the coal stored in the coal bunker starts to be gradually cooled until the temperature of the coal stored in the coal bunker is reduced to the set lowest temperature value, the microwave tube works again, and the operation is sequentially circulated.

Technical Field

The invention relates to the technical field of coal bunker storage equipment, in particular to a coal bunker heating and anti-freezing technology in a cold region.

Background

In northeast China, eastern inner Mongolia and parts of North China, the temperature is low in winter, and the lowest temperature can reach below-30 ℃. Because coal contains partial moisture, the phenomena of freezing, sticking and coal blockage of stored coal in a coal bunker easily occur in the coal mine in the area in winter, and the normal coal output and storage of the coal bunker are seriously influenced.

The traditional coal bunker heating technology is characterized in that a steam heating pipeline or a carbon fiber heating cable is installed on the wall of a coal bunker, then wear-resistant mortar is covered, the steam pipeline or the carbon fiber heating cable is embedded in concrete, heat is transferred to the concrete through boiler heating or carbon fiber cable power-on heating, then the concrete enables coal stored in the coal bunker to be slowly heated through heat conduction and heat radiation, the temperature in the coal bunker rises, whether the temperature is suitable or not is monitored through an infrared temperature detector, and therefore the anti-freezing purpose is achieved. However, the technology can only heat the stored coal from outside to inside; because the energy consumption is high by adopting external heating, the heating efficiency is low, the required thawing time is long, the engineering quantity is large, the cost is higher, and the actual using effect is very poor. The phenomenon that a coal bunker is abandoned due to blockage in winter and is stacked in the open air is often caused, so that the coal charging efficiency is directly influenced, and the environment is polluted.

Disclosure of Invention

In order to solve the technical defects of high energy consumption, low heating efficiency and long unfreezing time of the traditional coal bunker heating technology, the invention provides the coal bunker heating and antifreezing method for the cold regions, which has low cost and can quickly unfreeze and freeze stored coal.

In order to achieve the purpose, the invention adopts the following technical scheme:

a coal bunker heating and anti-freezing method in cold areas is characterized by comprising the following measures

Firstly, the method comprises the following steps: 4-8 groups of microwave tubes are arranged at the top of the coal bunker, microwaves emitted by the microwave tubes can activate water molecules contained in the stored coal, so that the stored coal is heated from inside to outside, and the larger the water content of the stored coal is, the larger the heating value is;

secondly, the method comprises the following steps: the metal plates are pre-embedded on the periphery of the side wall of the coal bunker and are covered by concrete, so that microwave energy can be effectively reflected, the reflected microwave energy is provided for coal storage again, and meanwhile, the radiation pollution to the surrounding environment caused by microwave leakage is prevented;

thirdly, the method comprises the following steps: in order to prevent the coal bunker from spontaneous combustion caused by overhigh temperature, an infrared temperature detector and a temperature controller are required to be installed on the upper part of the coal bunker, a signal cable of the detector is connected with a signal input end of the temperature controller, a control end of the temperature controller is electrically connected with a microwave tube power supply, the measurement time of the detector is set, and the infrared ray emitted by the coal in the coal bunker is measured at intervals (for example, 10 minutes);

fourthly: setting the temperature interval of the infrared temperature detector to be 10-50 ℃, when the temperature of the coal stored in the coal bunker is reduced to a set minimum temperature value, sending a starting instruction by the temperature controller, controlling the microwave tube to start emitting microwaves, enabling the coal stored to generate self-heating under the influence of self-moisture, and unfreezing and heating the frozen and sticky coal stored in the coal bunker; when the temperature of the coal stored in the coal bunker reaches the set highest temperature value, the temperature controller sends out a closing instruction to control the microwave tube to stop emitting microwaves, the coal stored in the coal bunker starts to be gradually cooled until the temperature of the coal stored in the coal bunker is reduced to the set lowest temperature value, the microwave tube works again, and the operation is sequentially circulated.

Compared with the prior art, the invention has the beneficial effects that:

1. through adopting the anti-freezing technology of microwave heating, compare with traditional steam heating pipeline or carbon fiber heating cable anti-freezing technology, have better penetrability, make the storage coal in the whole coal bunker rise the temperature simultaneously, need not by heating to the interior outward, can effectually shorten heat time, improve work efficiency, it is more energy-conserving, high-efficient, environmental protection, guaranteed the stable use of coal bunker.

2. The microwave heating anti-freezing technology is less in investment, the microwave heating anti-freezing technology is adopted to replace a steam heating pipeline or a carbon fiber heating cable anti-freezing technology, a microwave tube can be installed on the upper portion of a coal bunker according to the condition of the coal bunker, the phenomenon that the steam heating pipeline or the carbon fiber heating cable is wholly covered inside the coal bunker is avoided, the installation cost and the daily maintenance cost are reduced, the microwave tube is simpler to install, the maintenance is more worry-saving, a large amount of expenses can be saved for a company, the labor cost is reduced, and the microwave heating anti-freezing technology is an ideal practical.

3. The embedded metal plate on the side wall of the coal bunker has two functions, namely, the embedded metal plate can effectively reflect microwave energy and prevent the microwave leakage from causing radiation pollution to the surrounding environment; and secondly, the reflected microwave energy is provided for the coal bunker again to further heat the stored coal, so that the utilization rate of the microwave energy is improved, the energy consumption is saved, the cost is reduced, and the heating effect is better.

Drawings

FIG. 1 is a schematic view of an installation structure of a coal bunker heating anti-freezing device in a cold region according to the present invention;

fig. 2 is a schematic diagram of the working principle of the coal bunker heating anti-freezing device in the cold region.

In the figure: 1 bin body, 2 coal inlets, 3 coal outlets, 4 coal storages, 5 microwave tubes, 6 infrared temperature detectors and 7 metal plates.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-2, a heating and anti-freezing method for a coal bunker in a cold area specifically comprises the following measures:

firstly, the method comprises the following steps: referring to fig. 1, a coal bunker body 1 comprises a coal inlet 2 and a coal outlet 3, 4-8 groups of microwave tubes 5 are installed at the coal inlet 2, and metal plates 7 are embedded on the periphery of the side wall of the coal bunker and covered by concrete. It should be noted that, the microwave as an electromagnetic wave usually exhibits three characteristics of penetration, reflection, and absorption, the microwave can maintain strong penetration force at low temperature, and for the coal storage 4, the microwave almost passes through but is not absorbed. For metal substances, microwaves are reflected, water and ice can absorb the microwaves to heat the water and ice, so that the purposes of freezing prevention and thawing are achieved, the microwaves emitted by the microwave tube 5 can enable water molecules contained in the stored coal to be active, the stored coal is heated from inside to outside, and the larger the water content of the stored coal is, the larger the heating value is; the pre-embedded metal plate can effectively reflect microwave energy, the reflected microwave energy is supplied to the coal bunker again to further heat the stored coal, and meanwhile, the radiation pollution to the surrounding environment caused by microwave leakage is prevented;

secondly, the method comprises the following steps: in order to prevent the coal bunker from spontaneously combusting due to overhigh temperature, an infrared temperature detector 6 and a temperature controller are required to be arranged on the upper part of a coal bunker body 1, a signal cable of the infrared temperature detector 6 is connected to a signal input end of the temperature controller, a control end of the temperature controller is electrically connected with a power supply of a microwave tube 5, the measuring time of the infrared temperature detector 6 is set, and the temperature of infrared rays emitted by coal in the coal bunker is measured at intervals (such as 10 minutes);

thirdly, the method comprises the following steps: referring to a schematic diagram of fig. 2, a temperature interval of an infrared temperature detector 6 is set to be 10-50 ℃, when the temperature of the coal storage 4 in the coal bunker body 1 is reduced to a set lowest temperature value, a temperature controller sends out a starting instruction to control a microwave tube 5 to start emitting microwaves, the coal storage 4 is self-heated under the influence of self-moisture, and the frozen and sticky coal storage 4 in the coal bunker body 1 starts to be unfrozen and heated; when the temperature of the coal storage 4 in the coal bunker body 1 reaches the set highest temperature value, the temperature controller sends a closing instruction to control the microwave tube 5 to stop emitting microwaves, the coal storage 5 in the coal bunker body starts to be gradually cooled until the temperature is reduced to the set lowest temperature value, and the microwave tube 5 works again and circulates in sequence.

When the invention is implemented, the infrared temperature detector 6, the microwave tube 5, the temperature controller, the microwave power supply and other components can be all fixed on a frame, and then the frame is fixed on the top of the coal bunker body 1 by using expansion bolts. The electrical connection relationship among the microwave tube, the microwave power supply, the temperature controller and the infrared temperature detector is common knowledge in the field, and will not be described in detail herein.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.