CN104456505A - Low-concentration coal-bed methane or methane gas steam boiler - Google Patents
Low-concentration coal-bed methane or methane gas steam boiler Download PDFInfo
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- CN104456505A CN104456505A CN201410718065.XA CN201410718065A CN104456505A CN 104456505 A CN104456505 A CN 104456505A CN 201410718065 A CN201410718065 A CN 201410718065A CN 104456505 A CN104456505 A CN 104456505A
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Abstract
The invention discloses a low-concentration coal-bed methane or methane gas steam boiler. The lower part of an outside wall water wall is vertically communicated with an outside wall water wall lower header; the upper part of the outside wall water wall is inclined towards an upper boiler barrel and is communicated with the upper boiler barrel; two down pipes are mounted at the two ends of the outside wall water wall and between the outside wall water wall lower header and the upper boiler barrel; an inside wall water wall is directly mounted on the upper boiler barrel and a lower boiler barrel, and the upper boiler barrel and the lower boiler barrel are communicated through the inside wall water wall; the upper part of a rear wall water wall is connected with a rear wall water wall upper header, and the lower part of the rear wall water wall is connected with a rear wall water wall lower header; the rear wall water wall upper header and the rear wall water wall lower header are further respectively connected with the upper boiler barrel and the lower boiler barrel; the upper part of a front wall water wall is connected with a front wall water wall upper header, and the lower part of the front wall water wall is connected with a front wall water wall lower header; the front wall water wall upper header and the front wall water wall lower header are further respectively connected with the upper boiler barrel and the lower boiler barrel; burners are mounted on a bracket at the lower part of a hearth. The low-concentration coal-bed methane or methane gas steam boiler has the benefit that the low-concentration coal-bed methane or methane gas burners can be well mounted.
Description
Technical field
The invention belongs to heat power equipment technical field, relate to a kind of low concentration coal-bed gas or gas steam boiler.
Background technology
Low concentration coal-bed gas (gas) be often referred to concentration lower than 30% coal bed gas or gas, be the mixture of methane and air.Low concentration coal-bed gas (gas) boiler refers to that burning low concentration coal-bed gas (gas) produces the boiler of steam, is a kind of mesolow miniature boiler.
The general concentration of highly gassy mine down-hole extraction coal bed gas (gas), lower than 30%, because calorific value is low, to be in again or in near-by explosion concentration range, cannot safety and stability efficient burning being used on existing combustion apparatus.In addition, other similar gas is also had, as blast furnace gas, coke-stove gas, underground gasification gas, rubbish landfill gas, conventional gas etc.Because low concentration coal-bed gas (gas) burner is different from existing gas burner mode, when power is identical, its larger than existing gas burner tens times of arrangement areas needed, and need vertical, therefore can not directly combine with existing gas-steam boiler.
Existing combustion gas D type boiler, burner is generally arranged in boiler furnace front wall, and it is inner that combustion process occurs in whole burner hearth.And low concentration coal-bed gas (gas) burner belongs to flameless combustion, combustion process occurs in burner internal, belongs to surface emissivity formula burner, matches often need very large arrangement areas just can reach enough capacity with boiler.
Low concentration coal-bed gas (gas) Boiler Operation is: low concentration coal-bed gas (gas) enters low concentration coal-bed gas (gas) burner being arranged in burner hearth bottom.At burner internal Thorough combustion, a heat part for release is taken away by high-temperature flue gas, and a part, is absorbed to furnace wall cooling radiation by the saturation water in water-cooling wall by burner stromal surface.Limit is flowed backward to release heat in burner hearth in flue gas limit, by wash away after the turning smoke-box at burner hearth rear portion afterbody convection heating surface continue release heat, then through economizer be reduced to after uniform temperature through by chimney discharged to air.
Existing gas-steam boiler D type structure generally matches with diffusion type gas burner and designs, and burner is generally arranged in burner hearth front wall or side wall, and simultaneously, side wall also arranges water-cooling wall.Area required for burner arrangement is very little, easily arranges at front, side wall.The boiler of same capacity, the furnace wall area of layout needed for low concentration coal-bed gas (gas) burner is than layout large tens times of existing gas burner area.Meanwhile, existing burner is room combustion mode, and burning occurs in whole burner hearth, and combustion flame needs burner hearth to have enough spaces, guarantee full combustion of fuel and burner hearth safety.And low concentration coal-bed gas (gas) burner is surface emissivity formula burner, burning completes at burner internal, different with existing gas burner with the requirement of space size to chamber structure.
Summary of the invention
The object of the present invention is to provide a kind of low concentration coal-bed gas or gas steam boiler, solve the problem that existing gas fired-boiler chamber structure directly can not install low concentration coal-bed gas (gas) burner.
The technical solution adopted in the present invention:
Comprise upper drum and lower drum, external wall water-cooling wall lower vertical is connected with external wall water-cooling wall lower header, external wall water-cooling wall upper angled bends towards upper drum and is connected with upper drum, for ensureing hydrodynamic characterisitic good in external wall water-cooling wall, the two ends of side water wall outside, install two down-comers between external wall water-cooling wall lower header and upper drum, inside wall water-cooling wall is directly installed on upper drum and is communicated with lower drum by upper drum with on lower drum;
Rear water wall is connected with rear water wall upper collecting chamber and rear water wall lower header up and down respectively, and rear water wall upper collecting chamber is connected with lower drum with upper drum more respectively with rear water wall lower header;
Front water wall is connected with front water wall upper collecting chamber and front water wall lower header up and down respectively, and front water wall upper collecting chamber is connected with lower drum with upper drum more respectively with front water wall lower header;
External wall water-cooling wall, inside wall water-cooling wall, front water wall, rear water wall form burner hearth, and burner is arranged on lower furnace portion.
Further, described burner is porous media combustor, and the porous media of employing can be foam type, particle packing type, straight hole grid type or fleece lattice.Further, boiler oil is low concentration coal-bed gas or gas, also can be blast furnace gas, coke-stove gas, underground gasification gas, rubbish landfill gas, conventional gas etc.
Further, described burner arrangement, in lower furnace portion, according to boiler capacity size, is divided and is organized installation more.
Further, described boiler is a D type stove, two drum longitudinal structure, and be convection heating surface between upper drum and lower drum, convection heating surface is light pipe or low fin tube.
The invention has the beneficial effects as follows and low concentration coal-bed gas (gas) burner can be installed well.
Accompanying drawing explanation
Fig. 1 is the horizontal schematic diagram of boiler of the present invention;
Fig. 2 is the longitudinal schematic diagram of boiler of the present invention;
Fig. 3 is boiler rear water wall of the present invention and down-comer connection diagram;
Fig. 4 is boiler front water wall connection diagram of the present invention;
Fig. 5 is boiler body top cross-sectional view of the present invention;
Fig. 6 boiler and burner general assembly schematic diagram;
Top cross-sectional view installed by Fig. 7 burner.
In figure, 1-upper drum, 2-lower drum, 3-convection heating surface, 4-external wall water-cooling wall, 5-external wall water-cooling wall lower header, 6-down-comer, 7-rear water wall, 8-rear water wall lower header, 9-rear water wall upper collecting chamber, 10-front water wall, 11-front water wall lower header, 12-inside wall water-cooling wall, 13-front water wall upper collecting chamber, 14-economizer, 15-burner, 16-external thermal insulation, 17-inner thermal insulating layer.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figures 1 to 5, boiler is a pair of drum longitudinal D type boiler, and boiler is a D type stove, two drum longitudinal structure, and be convection heating surface 3 between upper drum 1 and lower drum 2, convection heating surface 3 is light pipe or low fin tube in the present invention.External wall water-cooling wall 4 lower vertical is connected with external wall water-cooling wall lower header 5, and external wall water-cooling wall 4 upper angled bends towards upper drum 1 and is connected with upper drum 1.For ensureing hydrodynamic characterisitic good in external wall water-cooling wall 4, the two ends of side water wall 4 outside, install two down-comers 6 respectively between external wall water-cooling wall lower header 5 and upper drum 1.This part water-cycling mode is: upper drum 1-down-comer 6-external wall water-cooling wall lower header 5-external wall water-cooling wall 4-upper drum 1, forms a circulation like this.Down-comer 6 have passed through strict insulation, and the water of the inside is not heated, and density is constant, and external wall water-cooling wall 4 absorbs burner hearth radiations heat energy, the inside water, and density diminishes, and under differential static pressure effect, water defines good Natural Circulation.External wall water-cooling wall 4 top is one domatic, both can ensure that burner hearth has enough liberation, was conducive to again water Natural Circulation.
Inside wall water-cooling wall 12 is directly installed on upper drum 1 and lower drum 2, is communicated with by upper drum 1 with lower drum 2, constitutes water-flow circuit between inside wall water-cooling wall 12-upper drum 1-lower drum 2-inside wall water-cooling wall 12 like this.
Rear water wall about 7 is connected with rear water wall lower header 8 with rear water wall upper collecting chamber 9 respectively, rear water wall upper collecting chamber 9 is connected with lower drum 2 with upper drum 1 more respectively with rear water wall lower header 8, forms the water-flow circuit between upper drum 1-lower drum 2-rear water wall lower header 8-rear water wall 7-rear water wall upper collecting chamber 9-upper drum 1.
Front water wall about 10 is connected with front water wall lower header 11 with front water wall upper collecting chamber 13 respectively, front water wall upper collecting chamber 13 is connected with lower drum 2 with upper drum 1 more respectively with front water wall lower header 11, forms the water-flow circuit between upper drum 1-lower drum 2-front water wall lower header 11-front water wall 10-rear water wall upper collecting chamber 13-upper drum 1.
Fig. 6 is boiler and burner general assembly schematic diagram, and the flue gas heat of generation is absorbed by economizer 14.Boiler furnace water-cooling wall all adopts fin panel casing except rear wall, and rear wall adopts bare-tube wall, is convenient to bend pipe, forms inspection opening.Low concentration coal-bed gas (gas) burner 15 is arranged in lower furnace portion, is connected with boiler furnace support by flange.
Burner mounting means as shown in Figure 7, for ensureing the uniformity of burning, burner 15 divides according to the size of boiler capacity organizes installation more.Low concentration coal-bed gas (gas) burner 15 is surface emissivity formula burners, and combustion process occurs in burner internal, completes burning in burner 15 inside, and its burning and heat transfer type and existing diffusion type gas burner are very different.Existing boiler structure can not directly and low concentration coal-bed gas (gas) burner match, this just requires that boiler will have special arrangement of burner, furnace water cooling wall construction and afterbody convection heating surface form, the heat transfer that guarantee is good, hydrodynamic characterisitic and higher economy.The present invention, according to the burning feature of this burner and heat transfer type, transforms D type gas fired-boiler, is all dismantled by its underpart water-cooling wall, for installing low concentration coal-bed gas (gas) burner.In order to prevent low concentration coal-bed gas (gas) from burning uneven, adopt multiple burner, the scheme of piecemeal layout, grouping air inlet.The porous media type that burner 15 adopts can be foam type, particle packing type, straight hole grid type or fleece lattice.Side water wall 4 is outer outside also can install inner thermal insulating layer 17 and external thermal insulation 16 additional, and externally side water wall 4 is incubated further.Boiler oil is low concentration coal-bed gas or gas, may also be the similar gases such as blast furnace gas, coke-stove gas, underground gasification gas, rubbish landfill gas, conventional gas.
Advantage of the present invention adopts low concentration coal-bed gas (gas) burner, solve a large amount of low concentration coal-bed gas (gas) unserviceable problem, can be mining area and production and life steam or hot water are provided, replace typical coal-fired boiler, there is good energy-saving and emission-reduction benefit.
The above is only to better embodiment of the present invention, not any pro forma restriction is done to the present invention, every any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong in the scope of technical solution of the present invention.
Claims (5)
1. a low concentration coal-bed gas or gas steam boiler, it is characterized in that: comprise upper drum (1) and lower drum (2), external wall water-cooling wall (4) lower vertical is connected with external wall water-cooling wall lower header (5), external wall water-cooling wall (4) upper angled bends towards upper drum (1) and is connected with upper drum (1), for ensureing hydrodynamic characterisitic good in external wall water-cooling wall (4), the two ends of side water wall (4) outside, between external wall water-cooling wall lower header (5) and upper drum (1), two down-comers (6) are installed, inside wall water-cooling wall (12) is directly installed on upper drum (1) and is communicated with lower drum (2) by upper drum (1) with on lower drum (2),
Rear water wall (7) is connected with rear water wall upper collecting chamber (9) and rear water wall lower header (8) up and down respectively, and rear water wall upper collecting chamber (9) is connected with lower drum (2) with upper drum (1) more respectively with rear water wall lower header (8);
Front water wall (10) is connected with front water wall upper collecting chamber (13) and front water wall lower header (11) up and down respectively, and front water wall upper collecting chamber (13) is connected with lower drum (2) with upper drum (1) more respectively with front water wall lower header (11);
External wall water-cooling wall (4), inside wall water-cooling wall (12), front water wall (10), rear water wall (7) form burner hearth, and burner (15) is arranged in burner hearth.
2. according to low concentration coal-bed gas a kind of described in claim 1 or gas steam boiler, it is characterized in that: described burner (15) is porous media combustor, the porous media type of employing is foam type, particle packing type, straight hole grid type or fleece lattice.
3. according to low concentration coal-bed gas a kind of described in claim 2 or gas steam boiler, it is characterized in that: the fuel of described burner (15) is low concentration coal-bed gas or gas, blast furnace gas, coke-stove gas, underground gasification gas, rubbish landfill gas, conventional gas.
4. according to low concentration coal-bed gas a kind of described in claim 1 or gas steam boiler, it is characterized in that: described burner (15), according to boiler capacity size, divides and organizes installation more.
5. according to low concentration coal-bed gas a kind of described in claim 1 or gas steam boiler, it is characterized in that: described boiler is a D type stove, two drum longitudinal structure, be convection heating surface (3) between upper drum (1) and lower drum (2), convection heating surface (3) is light pipe or low fin tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410718065.XA CN104456505A (en) | 2014-12-02 | 2014-12-02 | Low-concentration coal-bed methane or methane gas steam boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410718065.XA CN104456505A (en) | 2014-12-02 | 2014-12-02 | Low-concentration coal-bed methane or methane gas steam boiler |
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| CN104456505A true CN104456505A (en) | 2015-03-25 |
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| CN201410718065.XA Pending CN104456505A (en) | 2014-12-02 | 2014-12-02 | Low-concentration coal-bed methane or methane gas steam boiler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105202568A (en) * | 2015-10-14 | 2015-12-30 | 北京高能时代环境技术股份有限公司 | Secondary air device of domestic waste grate furnace |
| CN107741005A (en) * | 2017-11-28 | 2018-02-27 | 湖南长宏南雁锅炉修理安装有限公司 | The blast furnace gas steam boiler of high-efficiency environment friendly |
| CN108954370A (en) * | 2018-09-30 | 2018-12-07 | 浙江特富锅炉有限公司 | Water-cooling wall in low nitrogen water-tube boiler |
| CN110686232A (en) * | 2019-08-30 | 2020-01-14 | 无锡华光锅炉股份有限公司 | Inferior high temperature inferior high pressure pulverized coal fired boiler |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105202568A (en) * | 2015-10-14 | 2015-12-30 | 北京高能时代环境技术股份有限公司 | Secondary air device of domestic waste grate furnace |
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| CN110686232A (en) * | 2019-08-30 | 2020-01-14 | 无锡华光锅炉股份有限公司 | Inferior high temperature inferior high pressure pulverized coal fired boiler |
| CN110686232B (en) * | 2019-08-30 | 2024-05-24 | 无锡华光环保能源集团股份有限公司 | Secondary high-temperature and secondary high-pressure pulverized coal boiler |
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Application publication date: 20150325 |
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| RJ01 | Rejection of invention patent application after publication |