CN103406204A - Method and device for heating electrostatic precipitator insulator - Google Patents
Method and device for heating electrostatic precipitator insulator Download PDFInfo
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- CN103406204A CN103406204A CN2013103581543A CN201310358154A CN103406204A CN 103406204 A CN103406204 A CN 103406204A CN 2013103581543 A CN2013103581543 A CN 2013103581543A CN 201310358154 A CN201310358154 A CN 201310358154A CN 103406204 A CN103406204 A CN 103406204A
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Abstract
The invention discloses a method and device for heating an electrostatic precipitator insulator. The method comprises the following steps of adopting a microwave heater to heat a heat accumulator in a microwave cavity, enabling the heat accumulator to achieve the scheduled temperature, driving air to flow through the microwave heater through a fan, enabling the air and heat accumulator to perform heat convection so as to generate hot air, and conveying the hot air in an insulation can for heating and insulating of the electrostatic precipitator insulator in the insulation can.
Description
Technical field
The present invention relates to cottrell insulator technical field of heating, relate in particular to a kind of method and device that heats the cottrell insulator.
Background technology
In recent years, along with developing rapidly of economy, metallurgical steel-smelting electric furnace and take raw coal as the use of the boiler of fuel more and more extensive, the atmosphere pollution of these stove discharges can cause very large harm to surrounding environment, reducing or reduce the main path that stove discharges pollutants is all kinds of device for abatement of smoke and dust that match with stove, so the performance of deduster and efficiency are to determine that a stove is to the work the mischief key point of degree of surrounding environment.
But cottrell is because having, and efficiency of dust collection is high, the large gas of the high exhaust gas volumn of the low treatment temperature of energy consumption, the characteristics such as durable, convenient management, at industrial departments such as electric power, cement, metallurgy, coloured, chemical industry, light industry, electronics, machineries, obtain extensive use, in Air Pollution Control, brought into play very important effect.The inner target of cottrell plays the temperature of the insulator (insulated porcelain sleeve, porcelain insulator etc.) of load-bearing insulating effect need to be higher than flue gas dew point, otherwise easily cause the insulator dewfall to cause high-voltage breakdown or arcing, reduce the dust-precipitator corona discharge power, and reasonably electric precipitator corona power is one of key factor guaranteed electric cleaner safety, stable operation, the operation of corona discharge power low level can cause follow-up a series of production order to destroy.
Reason temperature on every side is not too low in order to guarantee seal, condensing water vapor appears on its surface, and make seal creepage (short circuit) phenomenon occur, destroy insulating properties, make operating voltage rise not get on, need around seal, incubator be set, make the insulator temperature higher than 20 ~ 30 ℃ of gas dew points.The dew point that insulator box is warmed up to higher than medium is the necessary condition that electric cleaner puts into operation, and medium temperature is higher, and the heating-up time is longer, and electric cleaner waits for that the time of putting into operation is also longer.The problem of insulator box heat tracing has become the key issue that electric precipitation puts into operation at present.
The method of commonly using at present: the one, adopt electric heating tube to be centered around around insulating part, utilize the electric heating tube surface temperature, by convection current, radiation etc., heat is delivered in insulating part and incubator and is incubated.But for the dust-precipitator of processing high dew point flue gas, this electric heater for heating mode heat temperature raising difficulty, the incubator actual temperature is lower than designing requirement, situation lower than dew-point temperature will easily appear in operation, cause the insulating part surface to be easy to dewfall, sticky ash, decreasing insulating, under the effect of high voltage direct current, cause insulating part surface creepage, arcing to occur and produce moment high temperature and damaging, the high pressure that affects whole deduster applies, thereby cause the dust pelletizing system Efficiency Decreasing, bring pressure for rear portion relieving haperacidity and environmental protection.This problem has become the crucial difficult problem of general character that cottrell is processed high-temperature flue gas, especially outstanding at aspects such as High-Temperature Strengthening melting such as Ai Salu, Flash Smelting Furnaces.The 2nd, the heating of burning type hot-blast stove, hot-blast stove commonly used all is based on fuel combustion and obtains hot blast at present, is divided into coal-fired hot-blast stove, oily hot-blast stove, fuel gas hot-blast stove with fuel type.Though the above-mentioned type of furnace can meet mostly insulation requirement, consider efficient, high temperature, clean hot blast and do not produce the factor such as secondary environmental pollution, they all can't directly apply to the incubator heat supply of cottrell.
So electric heater for heating mode of the prior art has slow, the deficiency such as easily dewfall, the efficiency of heating surface be low that heats up, and there is the problem that efficiency is low, unclean, can produce secondary environmental pollution in burning type hot-blast stove mode of heating.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of method and device that heats the cottrell insulator, be intended to solve the problem that cottrell insulator heating means in prior art occur that easily creepage, arcing phenomenon, the efficiency of heating surface are low, produce secondary environmental pollution.
Technical scheme of the present invention is as follows:
A kind of method that heats the cottrell insulator wherein, comprises step:
Adopt microwave applicator to heat the heat storage in microwave cavity, make heat storage reach predetermined temperature, by blower fan, drive air stream heated by microwave device, and make air and heat storage carry out heat convection, produce hot blast, described hot blast is transported to incubator, the cottrell insulator in incubator is carried out to heat tracing.
The method of described heating cottrell insulator, wherein, the power of described microwave applicator is 10 ~ 60kw.
The method of described heating cottrell insulator, wherein, the air mass flow that described blower fan drives is 0 ~ 450m
3/ min.
The method of described heating cottrell insulator, wherein, the frequency of the microwave emitter in described microwave applicator is 900MHz ~ 10GHz.
The method of described heating cottrell insulator, wherein, the firing rate of described cottrell insulator is: improve 250 ~ 300 ℃ in 2 ~ 3h.
A kind of device that heats the cottrell insulator, for cottrell is carried out to heat tracing, wherein, described device comprises microwave applicator, blower fan, incubator, apparatus control system;
Described apparatus control system is connected in described microwave applicator, heats for the heat storage of the microwave cavity to microwave applicator;
The air outlet slit end of described microwave applicator connects incubator one end by gas pipeline, carries out Heat preservation for the cottrell insulator to being arranged on incubator;
The described incubator other end connects the air intake end of described microwave applicator by blower fan, for the hot blast after heating, re-enter microwave applicator and carry out concurrent heating.
The device of described heating cottrell insulator, wherein, the air intake end of described microwave applicator is provided with the volume control device for air mass flow is controlled, and described volume control device is connected in described apparatus control system.
The device of described heating cottrell insulator, wherein, the air outlet slit end of described microwave applicator is provided with the temperature measuring equipment for detection of air outlet slit end temperature, and described temperature measuring equipment is connected in described apparatus control system.
The device of described heating cottrell insulator, wherein, described heat storage is silicon carbide material.
The device of described heating cottrell insulator, wherein, the other end of described incubator also connects the air intake end of described microwave applicator by gas pipeline, and described gas pipeline is outside equipped with insulation material.
Beneficial effect: the present invention adopts microwave applicator to heat the heat storage in microwave cavity, and drive air stream heated by microwave device by blower fan, thereby the mode by convection current, conduction and radiation by thermal energy transfer to air, produce hot blast, hot blast is transported to incubator, the cottrell insulator in incubator is carried out to heat tracing.The present invention has that the efficiency of heating surface is high, holding temperature is high, does not produce secondary pollution, environment amenable characteristics.
The accompanying drawing explanation
Fig. 1 is the structural representation that the present invention heats the device preferred embodiment of cottrell insulator.
Fig. 2 is the structural representation of heat storage in device shown in Figure 1.
The specific embodiment
The invention provides a kind of method and device that heats the cottrell insulator, clearer, clear and definite for making purpose of the present invention, technical scheme and effect, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
A kind of method that heats the cottrell insulator provided by the invention, it comprises step:
Adopt microwave applicator to heat the heat storage in microwave cavity, make heat storage reach predetermined temperature, by blower fan, drive air stream heated by microwave device, and make air and heat storage carry out heat convection, produce hot blast, described hot blast is transported to incubator, the cottrell insulator in incubator is carried out to heat tracing.Wherein, the power of microwave applicator is 10 ~ 60kw, and the air mass flow that blower fan drives is 0 ~ 450m
3/ min, the frequency of the microwave emitter in microwave applicator is 900MHz ~ 10GHz, the firing rate of cottrell insulator is: improve 250 ~ 300 ℃ in 2 ~ 3h.
Below in conjunction with device, heating process of the present invention is elaborated.
As shown in Figure 1, the device of heating cottrell insulator provided by the invention comprises: microwave applicator 200, blower fan 400, incubator 300, apparatus control system 100;
Wherein, apparatus control system 100 is connected in microwave applicator 200, heat storage for the microwave cavity to microwave applicator 200 carries out heating using microwave, the mode of its heating is to utilize the microwave energy of microwave emitter radiation in microwave applicator 200, heat storage is carried out to Fast Heating, the principle of heating is: microwave directly enters into the absorbing material of heat storage, with inner polar molecule, interact, at the high-frequency alternating elect magnetic field, reset, produce the strenuous exercise of similar fricting movement, rapidly microwave energy is converted into to heat energy, is stored in heat storage.
The air intake end connecting fan 400 of microwave applicator 200, by blower fan 400, air is brought in microwave applicator 200, with heat storage, carry out the heat exchange of the modes such as convection current, conduction, radiation, thereby transfer its energy in mobile air, produce the hot blast of cleanliness without any pollution.Blower fan 400 is wherein driven by motor 500, controls the start and stop of blower fan 400.
The air outlet slit end of described microwave applicator 200 connects incubator 300 1 ends by gas pipeline 800, by the hot blast produced after heat exchange, can be transported in incubator 300 by gas pipeline 800, thereby realize the cottrell insulator 310 be arranged in incubator 300 is carried out to Heat preservation.
Due to incubator 300 other ends, connect the air intake end of described microwave applicator 200 by blower fan 400, so the hot blast after heating also can re-enter in microwave applicator 200, carry out concurrent heating, realize circulating-heating.
Further, be provided with the volume control device 600 for air mass flow is controlled at the air intake end of described microwave applicator 200, described volume control device 600 is connected in described apparatus control system 100.
Air outlet slit end at described microwave applicator 200 is provided with the temperature measuring equipment 700 for detection of air outlet slit end temperature, and described temperature measuring equipment 700 is connected in described apparatus control system 100.By detecting the temperature of air outlet slit end, determine the temperature whether air themperature of air outlet slit end suits the requirements, and according to adjusting air mass flow or adjusting microwave applicator power and adjust air outlet slit end temperature.
Further, described heat storage is silicon carbide material, and as shown in Figure 2, the heat storage of silicon carbide material has the ability of stronger absorption microwave to the structure of carborundum heat storage 210, and can lay in sufficient heat.
Further, the other end of described incubator 300 also connects the air intake end of described microwave applicator 200 by gas pipeline 800, the two ends that are incubator 300 all connect gas pipeline, and connect respectively air intake end and the air outlet slit end of microwave applicator 200, outside described gas pipeline 800, also insulation material can be set, insulation material can be rock wool, pyroceram cotton, alumina silicate, microporous calcium silicate, composition silicate or polyurethane combined material etc., the insulation material high insulating effect of above-mentioned material, can effectively reduce thermal loss.Gas pipeline itself can adopt the materials such as mullite material or aluminium oxide, alumina silicate.
Below by specific embodiment, the course of work of the present invention is described in detail.
First stage: be initial warm-up phase, in this stage, blower fan 400 cuts out, the atmosphere draught-free in whole loop, and microwave applicator 200 is opened, power is 33.7kw, utilize the microwave energy of microwave emitter radiation, the silicon carbide material heat storage in microwave cavity is carried out to Fast Heating, make heat storage reach predetermined temperature (1108 ℃), improve the ability that heat storage absorbs microwave, and make the sufficient energy of heat storage deposit.
Second stage: be the periodic duty stage, after the heat storage of microwave applicator 200 is heated to 1108 ℃, blower fan 400 is opened, the air circulation driven in loop flows, air is after the air intake end of microwave applicator 200 enters into microwave applicator 200, with inner heat storage, carry out the forced-convection heat transfer intensification, then air-flow is transported in incubator by gas pipeline 800, cottrell insulator 310 is carried out to Heat preservation, the other end at incubator 300 is provided with outlet, the outlet of air by incubator 300 flow back in microwave applicator 200 again carries out concurrent heating, by gas pipeline 800, enter into incubator 300 again, reach the purpose that circulates heating.In the periodic duty stage, can realize the control to temperature by adjustment microwave applicator 200 power and gas flow on apparatus control system 100, so that cottrell insulator 310 surface temperatures are higher than flue-gas temperature, avoid because dewfall causes creepage, arcing phenomenon, to improve the dust-collecting efficiency of dust-precipitator.
Three phases: cottrell insulator dewfall baking stage, variation due to component contents such as the sulfide in flue gas, steam, cause flue gas dew point to fluctuate to some extent, may cause cottrell insulator 310 wall dewfall, reduce corona discharge power and cause dust-collecting efficiency to descend.So after cottrell insulator 310 dewfall were made moist, the power that improves microwave applicators 200 by apparatus control system 100 was to 54kw, and air mass flow is increased to 20m
3/ min, the output high-temperature gas carries out heating, drying to cottrell insulator 310, improves corona discharge power to 1200w/m
3/ s, make the power that gathers dust of cottrell reach 99.88%.
Microwave heating of the present invention is different from conventional heating, conventional heating needs from outside to inside, the conduction of the heat of carrying out from outward appearance to inner essence, this heating means efficiency is low, speed is slow, heating using microwave of the present invention is directly to add thermal material by the energy dissipation of electromagnetic wave in material inside, according to the difference of material dielectric property, can be timely and effectively at the inner heat that produces of whole material.
So microwave heating has advantages of that the conventional heating mode is incomparable: selectively add thermal material, heating rate is fast, the efficiency of heating surface is high; Make material obtain or lose origin of heat in moment, be easy to automatic control.The present invention is exactly these advantages of utilizing heating using microwave, particularly, to the high efficiency energy transformation characteristics of high dielectric loss material, microwave energy effectively is converted into to heat energy output, thereby the cottrell insulator is heated.The present invention has overcome that the intensification of Resistant heating is slow, temperature control, electrothermal tube easily fuses, replacing insulator is frequent, difficult in maintenance problem, also overcome the secondary pollution problem that the heating of traditional hot-blast stove brings, be a kind of fast, the cottrell insulator heating means of efficient, environmental protection, safety.
In sum, the present invention utilizes the heating using microwave absorbing material, microwave energy is converted to heat energy, then by blower fan, drive air and carry out forced convertion generation hot blast with suction ripple heat storage, utilize the hot blast produced to carry out Heat preservation to the cottrell insulator, the efficiency of heating surface of the present invention is high, heating effect good, can improve the dust-collecting efficiency of cottrell, thereby reach the purpose of energy-saving and emission-reduction, and solved that the efficiency of heating surface that Resistant heating, gas heating bring is low, the problem of inadequate environmental protection.The invention provides a kind of fast, energy-saving and environmental protection, efficient, safe cottrell insulator heater.
In sum, the present invention adopts microwave applicator to heat the heat storage in microwave cavity, and drive air stream heated by microwave device by blower fan, thereby the mode by convection current, conduction and radiation by thermal energy transfer to air, produce hot blast, hot blast is transported to incubator, the cottrell insulator in incubator is carried out to heat tracing.The present invention has that the efficiency of heating surface is high, holding temperature is high, does not produce secondary pollution, environment amenable characteristics
Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or conversion, and all these improve and conversion all should belong to the protection domain of claims of the present invention.
Claims (10)
1. a method that heats the cottrell insulator, is characterized in that, comprises step:
Adopt microwave applicator to heat the heat storage in microwave cavity, make heat storage reach predetermined temperature, by blower fan, drive air stream heated by microwave device, and make air and heat storage carry out heat convection, produce hot blast, described hot blast is transported to incubator, the cottrell insulator in incubator is carried out to heat tracing.
2. the method for heating cottrell insulator according to claim 1, is characterized in that, the power of described microwave applicator is 10 ~ 60kw.
3. the method for heating cottrell insulator according to claim 1, is characterized in that, the air mass flow that described blower fan drives is 0 ~ 450m
3/ min.
4. the method for heating cottrell insulator according to claim 1, is characterized in that, the frequency of the microwave emitter in described microwave applicator is 900MHz ~ 10GHz.
5. the method for heating cottrell insulator according to claim 1, is characterized in that, the firing rate of described cottrell insulator is: improve 250 ~ 300 ℃ in 2 ~ 3h.
6. a device that heats the cottrell insulator, for cottrell is carried out to heat tracing, is characterized in that, described device comprises microwave applicator, blower fan, incubator, apparatus control system;
Described apparatus control system is connected in described microwave applicator, heats for the heat storage of the microwave cavity to microwave applicator;
The air outlet slit end of described microwave applicator connects incubator one end by gas pipeline, carries out Heat preservation for the cottrell insulator to being arranged on incubator;
The described incubator other end connects the air intake end of described microwave applicator by blower fan, for the hot blast after heating, re-enter microwave applicator and carry out concurrent heating.
7. the device of heating cottrell insulator according to claim 6, it is characterized in that, the air intake end of described microwave applicator is provided with the volume control device for air mass flow is controlled, and described volume control device is connected in described apparatus control system.
8. the device of heating cottrell insulator according to claim 6, is characterized in that, the air outlet slit end of described microwave applicator is provided with the temperature measuring equipment for detection of air outlet slit end temperature, and described temperature measuring equipment is connected in described apparatus control system.
9. the device of heating cottrell insulator according to claim 6, is characterized in that, described heat storage is silicon carbide material.
10. the device of heating cottrell insulator according to claim 6, is characterized in that, the other end of described incubator also connects the air intake end of described microwave applicator by gas pipeline, and described gas pipeline is outside equipped with insulation material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103581543A CN103406204A (en) | 2013-08-16 | 2013-08-16 | Method and device for heating electrostatic precipitator insulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103581543A CN103406204A (en) | 2013-08-16 | 2013-08-16 | Method and device for heating electrostatic precipitator insulator |
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| CN103406204A true CN103406204A (en) | 2013-11-27 |
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| CN2013103581543A Pending CN103406204A (en) | 2013-08-16 | 2013-08-16 | Method and device for heating electrostatic precipitator insulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344482A (en) * | 2015-10-10 | 2016-02-24 | 大唐甘谷发电厂 | Method for reducing power consumption of electric precipitation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344482A (en) * | 2015-10-10 | 2016-02-24 | 大唐甘谷发电厂 | Method for reducing power consumption of electric precipitation |
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Application publication date: 20131127 |
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