CN202709088U - High-efficiency coal powder burning device for molten salt furnace - Google Patents
High-efficiency coal powder burning device for molten salt furnace Download PDFInfo
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- CN202709088U CN202709088U CN 201220233278 CN201220233278U CN202709088U CN 202709088 U CN202709088 U CN 202709088U CN 201220233278 CN201220233278 CN 201220233278 CN 201220233278 U CN201220233278 U CN 201220233278U CN 202709088 U CN202709088 U CN 202709088U
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- molten salt
- combustion chamber
- salt furnace
- cyclone cylinder
- coal powder
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Abstract
The utility model discloses a high-efficiency coal powder burning device for a molten salt furnace. The high-efficiency coal powder burning device comprises a molten salt furnace body and an auxiliary burning device. The auxiliary burning device comprises a cyclone barrel burning chamber and a burnout chamber, one side of the burnout chamber is communicated with the cyclone barrel burning chamber, and the other side of the burnout chamber is connected with a hearth connector of the molten salt furnace body. A coal powder spraying gun is arranged on the top of the cyclone burning chamber and is connected with an air powder mixer through a delivery pipeline. A slag baffle pipe is arranged in the burnout chamber and is connected with a heat exchanger through a circulating oil pump to form a circulating cooling system, and the delivery pipeline penetrates through the heat exchanger. The high-efficiency coal powder burning device has the advantages of high burning efficiency, low running cost, dualpurpose application for coal briquettes and coal powder without modifying the original structure of a boiler, no modification risk, no affection on production and lower main pollutant emission.
Description
Technical field
The utility model belongs to the molten salt furnace technical field, particularly a kind of efficient molten salt furnace coal powder burner.
Background technology
China is energy resource consumption big country, and in the wastage in bulk or weight of the national energy, coal occupies very large proportion, reaches more than 75%.Energy restructuring is all being carried out in countries in the world, saving to greatest extent the utilization of the existing energy, and alleviates the environmental pollution that day by day increases the weight of.The energy-saving and emission-reduction situation is for China's severe, and country also addresses the above problem trying every possible means by every possible means.
In molten salt furnace, still adopt in a large number traveling-grate stoker at present, traveling-grate stoker can only use lump coal (bituminous coal), and broken coal, particularly coal dust can't burn.Because the price comparison of lump coal (bituminous coal) is expensive, and is difficult to grill thoroughly at traveling-grate stoker, the molten salt furnace heat loss due to incomplete combustion is more serious, therefore, adopts pulverized coal combustion significant to energy-saving and emission-reduction to molten salt furnace.
Limited by the powder manufacturing apparatus cost, coal dust firing only is used for station boiler, but present breakthrough along with powder-making technique, cost significantly descends, and makes coal dust firing also can be applicable to molten salt furnace, replaces coal cinder with coal dust on molten salt furnace, low price not only, efficiency of combustion also improves greatly, can save operating cost more than 30%, produces obvious economic benefit.
Therefore, the porch of the secondary furnace of existing pulverized anthracite burning device is provided with the pushing off the slag pipe, the pushing off the slag pipe adopts the independent conduction oil circulatory system, with oil circulating pump conduction oil is circulated between pushing off the slag pipe and heat-exchange device, behind the pushing off the slag pipe, the content of dust reduces greatly in the high-temperature flue gas that burning produces, and can satisfy the normal operation of existing molten salt furnace.
The utility model content
The purpose of this utility model is for existing molten salt furnace burner, provides a kind of in the situation that former molten salt furnace body and charging combustion parts are not changed, and realizes the coal dust efficient burning, the efficient molten salt furnace coal powder burner that reduced exhaust pollutes.
The utility model is achieved in that efficient molten salt furnace coal powder burner, comprise molten salt furnace body and assisted combustion device, described assisted combustion device comprises cyclone cylinder combustion chamber and secondary furnace, secondary furnace one side is connected with the cyclone cylinder combustion chamber and communicates, and the opposite side of secondary furnace is connected with the burner hearth interface of boiler pressurized body; The top of described cyclone cylinder combustion chamber is provided with pulverized coal gun, and described pulverized coal gun is connected with air and powder mixer by feeding pipe; Be provided with the pushing off the slag pipe in the described secondary furnace, described pushing off the slag pipe links to each other with heat-exchange device by oil circulating pump and forms circulating cooling system; Described feeding pipe passes described heat-exchange device, and the high temperature heat conductive oil in the heat-exchange device can heat the coal dust in the feeding pipe, and its temperature is risen to more than 200 degree, accelerates coal dust in cyclone cylinder combustion chamber internal combustion.
Be provided with tangent air inlet on the sidewall on top, described cyclone cylinder combustion chamber.
Described tangent air inlet comprises tangent air inlet and secondary tangent air inlet, and tangent air inlet and secondary tangent air inlet are to arrange successively from top to bottom in the both sides of combustion chamber wall surface.
The inwall place of the corresponding secondary furnace port in described cyclone cylinder combustion chamber is provided with downward-sloping flue gas guide plate, and described flue gas guide plate makes cyclone cylinder combustion chamber and secondary furnace form exhaust gases passes, and the bottom of cyclone cylinder combustion chamber is provided with the sediment outlet.
The angle of described flue gas guide plate and described cyclone cylinder combustion chamber madial wall is for being 50 °.
It is conical that the lower end of described cyclone cylinder combustion chamber is, and the below of sediment outlet is provided with detritus tank.
Face arch and rear arch are housed in the burner hearth of described molten salt furnace, make the high-temperature flue gas that is sprayed in the molten salt furnace burner hearth by combustion barrel become " L " shape to flow.
The original coal bunker of described high molten salt furnace keeps fully, without any changes.
The utlity model has following beneficial effect: 1. efficiency of combustion is higher: coal dust mixes with air by heating and sprays into cyclone cylinder combustion chamber internal combustion again, and speed of ignition is faster, and efficiency of combustion is higher, and discharging calorific value also can Effective Raise; 2. operating cost is low: coal dust heats with the exchanged heat of pushing off the slag pipe cooling, can effectively recycle the energy, and the coal dust price is lower than the bituminous coal coal cinder, and pulverized coal fired boiler efficient to be higher than coal-fired piece boiler, adopt coal dust to replace the bituminous coal coal cinder, can save operating cost more than 35%; 3. coal cinder and coal dust are dual-purpose, need not to change the original structure of molten salt furnace, can realize that coal cinder and coal dust are dual-purpose, without any transformation risk, provide multiple choices to the user, need not blowing out in the time of repacking and install, and do not affect production; During the transformation, keep original combustion apparatus, traveling-grate stoker and coal bunker are not done change, and during the precombustion chamber fabrication and installation, former molten salt furnace is work as usual, does not affect production; 4. environmental protection is good: compare with burning smoke coal coal cinder, burning coal powder can reduce the discharging of dust greatly, because the raising of efficient, discharge of major pollutant also greatly reduces.
Description of drawings
Fig. 1 is the structural representation of the efficient molten salt furnace coal powder burner of the utility model.
Wherein, 1 is pulverized coal gun; 2 are tangential air port once; 3 is the tangential air port of secondary; 4 is the cyclone cylinder combustion chamber; 5 is the flue gas guide plate; 6 are the pushing off the slag pipe; 7 is secondary furnace; 8 is detritus tank; 9 is oil circulating pump; 10 is heat-exchange device; 11 are the sediment outlet; 12 is the molten salt furnace body; 13 for removing cinder notch; 14 is the coal dust input pipe; 15 is air and powder mixer; 16 is face arch; 17 is rear arch; 18 is coal bunker.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in detail.
The high-efficiency pulverized coal burner can be by simply transforming to realize to existing molten salt furnace.As shown in Figure 1, the high-efficiency pulverized coal burner, comprise molten salt furnace body 12 and assisted combustion device, described assisted combustion device comprises cyclone cylinder combustion chamber 4 and secondary furnace 7, described secondary furnace 7 one sides are connected with cyclone cylinder combustion chamber 4 and communicate, and the opposite side of secondary furnace 7 is connected with the burner hearth interface of molten salt furnace body 12.
Cyclone cylinder combustion chamber 4 can adopt vertical structure to place, and secondary furnace 7 adopts horizontal type structure to place.Described cyclone cylinder combustion chamber 4 can be integrative-structure with secondary furnace 7.The top of described cyclone cylinder combustion chamber 4 is provided with pulverized coal gun 1, and pulverized coal gun 1 is connected with air and powder mixer 15 by feeding pipe 14.Air and powder mixer 15 is that the coal dust in the coal bunker on it is fully mixed with air, then is transported to pulverized coal gun 1, spurts in the cyclone cylinder combustion chamber 4 again and burns.The interface of secondary furnace 7 tail end settings and molten salt furnace burner hearth is connected with molten salt furnace burner hearth 12 by the burner hearth interface, and is provided with except cinder notch 11 below the secondary furnace afterbody.
Be provided with pushing off the slag pipe 6 in the described secondary furnace 7, the slag in the secondary furnace 7 is by discharging except cinder notch 11.Pushing off the slag pipe 6 adopts the independently conduction oil circulatory system, circulate between pushing off the slag pipe 6 and heat-exchange device 10 with the conduction oil of oil circulating pump 9 with heat-exchange device 10, effectively utilized the heat energy of liquid slag, behind pushing off the slag pipe 6, the content of dust reduces greatly in the high-temperature flue gas that burning produces, and can satisfy the normal operation of existing molten salt furnace.Described heat transferring medium is conduction oil.Described feeding pipe 14 passes described heat-exchange device 10, and the conduction oil in the heat-exchange device 10 can heat the coal dust in the feeding pipe 14, accelerates coal dust in cyclone cylinder combustion chamber 4 internal combustion.
On the described cyclone cylinder combustion chamber 4, be connected with secondary furnace 7 and be respectively equipped with tangent air inlet 2 and secondary tangent air inlet 3 on the sidewall of top of phase port, tangent air inlet 2 and secondary tangent air inlet 3 be for arranging successively from top to bottom, and be arranged in the both sides of combustion chamber wall surface.The inwall of 4 corresponding secondary furnace 7 ports is provided with downward-sloping flue gas guide plate 5 in the cyclone cylinder combustion chamber, and flue gas guide plate 5 is generally about 50 ° with the sidewall angle of described cyclone cylinder combustion chamber 4, and flue gas guide plate 5 forms exhaust gases passes with secondary furnace 7.The bottom of cyclone cylinder combustion chamber 4 is conical, and its bottom is provided with sediment outlet 11, and the below of sediment outlet 11 is provided with detritus tank 8.Face arch 16 and rear arch 17 are housed in the described molten salt furnace burner hearth, make the high-temperature flue gas that is sprayed in the molten salt furnace burner hearth by combustion barrel become " L " shape to flow, prolong the time of staying of high-temperature flue gas in stove, strengthen heat exchange.
Ruuning situation of the present utility model is as follows: coal dust is sprayed in the cyclone cylinder combustion chamber 4 by pulverized coal gun 1 High Rotation Speed by air and powder mixer 15, and its combustion space is the fireball of High Rotation Speed, and burning velocity is tens times of common molten salt furnace.The needed air of coal dust firing, be divided into a few part Tangential Winds, a Tangential Wind that is namely entered by tangential air port 2 once and the secondary Tangential Wind that is entered by the tangential air port 3 of secondary, the needed portion of air of coal dust firing tangentially enters cyclone cylinder combustion chamber 4 by tangential air port 1 once, makes High Rotation Speed.Once tangential air port 2 is in a distance, pulverized coal gun downstream; The air-flow of High Rotation Speed entrainments cyclone cylinder combustion chamber 4 front ends with high-temperature flue gas in the cyclone cylinder combustion chamber, has guaranteed that cyclone cylinder combustion chamber 4 front ends can keep sufficiently high temperature, so that coal dust is able to Fast Heating, and the stable ignition burning; Coal dust after catching fire fully burns needed another part air by 3 places, the tangential air port of secondary, tangentially enter the cyclone cylinder combustion chamber from furnace wall, cyclone cylinder combustion chamber, High Rotation Speed makes the strong vorticla motion of cyclone cylinder combustion chamber 4 interior formation and complicated axial flow, as shown, combustion process is more red-hot, the high-temperature flue gas that coal dust firing produces is turned back under the effect of flue gas guide plate 5 in the bottom of cyclone cylinder combustion chamber 4 and is entered the 7 further afterburnts of burning chamber, enter the burner hearth of molten salt furnace, the time of staying reached more than 10 seconds in burning chamber 7 and molten salt furnace burner hearth, guaranteed that the burnout rate of coal dust is more than 95%.Because cyclone combustion chamber 4 is not arranged heating surface, so ignition temperature is high, far surpass ash fusion point.A large amount of ash contents are molten into liquid state, flow into detritus tank 8 along combustion chamber wall surface, it can not be entered in the molten salt furnace, in order to avoid the serious dust stratification of molten salt furnace heating surface affects molten salt furnace and exerts oneself.This kind caught the slag mode can remove ash content more than 80%.Remaining tiny flying dust can directly be taken away with flue gas, can not deposit in molten salt furnace, therefore can not affect molten salt furnace and exert oneself; Simultaneously, water-cooling pattern can be adopted in cyclone cylinder combustion chamber 4, is equivalent to increase evaporating heating surface, waste heat boiler is exerted oneself further improve.The cooling water that detritus tank is 8 li cools off lime-ash on the one hand, has also played on the other hand the effect of sealed combustion chamber, and the combustion position in the combustion chamber is little negative-pressure firing like this, thereby has guaranteed efficiency of combustion.Cyclone cylinder combustion chamber lower space is intended adopting and is built ground by laying bricks or stones, and is provided with breast hole, access door, conveniently clears up and keeps in repair.Arch before and after being equipped with in the molten salt furnace burner hearth makes the high-temperature flue gas that is sprayed in the molten salt furnace burner hearth by combustion barrel become " L " shape to flow, and prolongs the time of staying of high-temperature flue gas in stove, strengthens heat exchange, and the efficient of molten salt furnace is further improved.
Above-described embodiment is not to be to restriction of the present utility model; the those of ordinary skill in relevant technologies field; in the situation that do not break away from spirit and scope of the present utility model; can also make various variations and modification; therefore all technical schemes that are equal to also should belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by each claim.
Claims (7)
1. efficient molten salt furnace coal powder burner, comprise molten salt furnace body and assisted combustion device, described assisted combustion device comprises cyclone cylinder combustion chamber and secondary furnace, and secondary furnace one side is connected with the cyclone cylinder combustion chamber and communicates, and the opposite side of secondary furnace is connected with the burner hearth interface of molten salt furnace body; It is characterized in that: the top of described cyclone cylinder combustion chamber is provided with pulverized coal gun, and pulverized coal gun is connected with air and powder mixer by feeding pipe; Be provided with the pushing off the slag pipe in the described secondary furnace, described pushing off the slag pipe links to each other with heat-exchange device by oil circulating pump and forms cool cycles; Described feeding pipe passes described heat-exchange device.
2. according to efficient molten salt furnace coal powder burner claimed in claim 1, it is characterized in that: be provided with tangent air inlet on the sidewall on top, described cyclone cylinder combustion chamber.
3. according to efficient molten salt furnace coal powder burner claimed in claim 2, it is characterized in that: described tangent air inlet comprises tangent air inlet and secondary tangent air inlet, and tangent air inlet and secondary tangent air inlet are to arrange successively from top to bottom in the both sides of combustion chamber wall surface.
4. according to efficient molten salt furnace coal powder burner claimed in claim 1, it is characterized in that: the inwall place of the corresponding secondary furnace port in described cyclone cylinder combustion chamber is provided with downward-sloping flue gas guide plate, guide plate makes cyclone cylinder combustion chamber and secondary furnace form exhaust gases passes, and the bottom of cyclone cylinder combustion chamber is provided with the sediment outlet.
5. according to efficient molten salt furnace coal powder burner claimed in claim 4, it is characterized in that: the angle of described flue gas guide plate and described cyclone cylinder combustion chamber madial wall is for being 50 °.
6. according to efficient molten salt furnace coal powder burner claimed in claim 4, it is characterized in that: the lower end of described cyclone cylinder combustion chamber is conical, and the below of sediment outlet is provided with detritus tank.
7. according to efficient molten salt furnace coal powder burner claimed in claim 1, it is characterized in that: face arch and rear arch are housed in the burner hearth of described molten salt furnace, make the high-temperature flue gas that is sprayed in the molten salt furnace burner hearth by combustion barrel become " L " shape to flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220233278 CN202709088U (en) | 2012-05-22 | 2012-05-22 | High-efficiency coal powder burning device for molten salt furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220233278 CN202709088U (en) | 2012-05-22 | 2012-05-22 | High-efficiency coal powder burning device for molten salt furnace |
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| CN202709088U true CN202709088U (en) | 2013-01-30 |
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| CN 201220233278 Expired - Fee Related CN202709088U (en) | 2012-05-22 | 2012-05-22 | High-efficiency coal powder burning device for molten salt furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496357A (en) * | 2019-09-24 | 2019-11-26 | 江苏帕斯玛环境科技有限公司 | The plasma cracking device of high saliferous, high concentration organic raffinat |
| CN111773909A (en) * | 2020-08-07 | 2020-10-16 | 天津水泥工业设计研究院有限公司 | Same-stroke cement kiln SNCR system |
-
2012
- 2012-05-22 CN CN 201220233278 patent/CN202709088U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496357A (en) * | 2019-09-24 | 2019-11-26 | 江苏帕斯玛环境科技有限公司 | The plasma cracking device of high saliferous, high concentration organic raffinat |
| CN110496357B (en) * | 2019-09-24 | 2024-06-04 | 江苏帕斯玛环境科技有限公司 | Plasma cracking device for high-salt-content and high-concentration organic raffinate |
| CN111773909A (en) * | 2020-08-07 | 2020-10-16 | 天津水泥工业设计研究院有限公司 | Same-stroke cement kiln SNCR system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20140522 |