CN203758260U - Furnace pipe of fuel gas industrial boiler - Google Patents
Furnace pipe of fuel gas industrial boiler Download PDFInfo
- Publication number
- CN203758260U CN203758260U CN201420154485.5U CN201420154485U CN203758260U CN 203758260 U CN203758260 U CN 203758260U CN 201420154485 U CN201420154485 U CN 201420154485U CN 203758260 U CN203758260 U CN 203758260U
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- China
- Prior art keywords
- end plate
- combustion chamber
- flue
- defend
- fuel gas
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Abstract
The utility model relates to a furnace pipe of a fuel gas industrial boiler. The furnace pipe of the fuel gas industrial boiler is characterized by comprising a horizontally-arranged cylindrical furnace pipe body, both ends of the furnace pipe body are respectively provided with an end plate, the center of one of the end plate is provided with a center hole for connecting a fuel gas burner, and the other end plate is provided with a plurality of evenly-distributed round holes for connecting a fire tube; a cylindrical refractory combustion chamber is horizontally arranged in the furnace pipe body, the transverse cross section of the refractory combustion chamber is an equilateral triangle, a square or a regular pentagon, and the connection portion of the refractory combustion chamber with the furnace pipe body is a rounded structure; the opening end of the refractory combustion chamber faces the end plate with the central hole and is spaced from the end plate. The furnace pipe of the fuel gas industrial boiler can be widely used for a small fuel gas industrial boiler.
Description
Technical field
The utility model relates to a kind of flue of Industrial Boiler, particularly about a kind of flue of the gas industry boiler that is applicable to fuel gas with low heat value burning.
Background technology
Along with the rapid growth of world energy sources demand, energy prices are constantly soaring, and unheeded fuel gas with low heat value came into one's own day by day in the past.Much metallurgy and chemical enterprise can produce a large amount of fuel gas with low heat value in process of production, as blast furnace gas, synthetic ammonia tailgas, calcium carbide stove exhaust etc.Recycle fuel gas with low heat value and can alleviate energy scarcity, can reduce again environmental pollution, become the important content that the Chinese government encourages industry energy conservation to reduce discharging at present.But because the calorific value of fuel gas with low heat value is lower and component is changeable, poor combustion stability in practical application, affects the safe operation of equipment.
For common small gas Industrial Boiler, in the time using fuel gas with low heat value, for solving the problem of poor combustion stability, need near the inboard wall of furnace face near fuel gas inlet, lay one section of wall with refractory lining, refracto, improve fire area temperature, help the burning of fuel gas with low heat value stable ignition.But, because wall with refractory lining, refracto has covered a part of inboard wall of furnace, hindering the heat transfer between this section of high-temperature flue gas and water, the area of heat-transfer surface incurs loss, and causes that exhaust gas temperature raises, the thermal efficiency declines.In actual applications, the wall with refractory lining, refracto of small gas Industrial Boiler lay often face awkward: wall with refractory lining, refracto area is too small, not obvious to the steady combustion effect of low calorie fuels; Area is excessive, can affect system thermal efficiency.
" laminated adjustable burning guarding belt " that " rotary plate type adjustable burning guarding belt " that Chinese Patent Application No. 97107948.X proposes and Chinese Patent Application No. 97107949.8 propose realized the work area that regulates wall with refractory lining, refracto according to the load condition of boiler by special structural design, can obviously reduce taking of wall with refractory lining, refracto exchange hot side under small load condition.But small gas Industrial Boiler moves conventionally for a long time under rated power,, under operating mode at full capacity, above-mentioned two kinds of adjustable burning guarding belts still can take large-area heat-transfer surface, affect system thermal efficiency.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide a kind of flue that takies the gas industry boiler that is applicable to fuel gas with low heat value burning that heat-transfer surface is few, heat transfer efficiency is high.
For achieving the above object, the utility model is by the following technical solutions: a kind of flue of gas industry boiler, it is characterized in that: it comprises that one is horizontally disposed flue body cylindraceous, the two ends of described flue body are respectively arranged with an end plate, wherein described in one, the center of end plate offers one for connecting the centre bore of gas burner, offers some equally distributed for connecting the circular hole of fire tube on another end plate; What the inner horizontal of described flue body was provided with a tubular defends combustion chamber, described in defend combustion chamber cross section be one of equilateral triangle, square and regular pentagon, described in defend combustion chamber and described flue body junction be fillet structure; The described opening end of defending combustion chamber is towards the described end plate of described centre bore place one side and and between end plate, leave spacing described in this.
1/3～2/3 of the length that the described horizontal length of defending combustion chamber is described flue body.
5%～15% of the internal diameter that the described spacing of defending the combustion opening end of chamber and the described end plate of described centre bore place one side is described flue body.
The described combustion chamber of defending adopts refractory temperature higher than the ceramic refractory of 1600 DEG C.
The utility model is owing to taking above technical scheme, and it has the following advantages: 1, the combustion chamber of defending of the present utility model, than traditional wall with refractory lining, refracto, only needs to take a small amount of flue heat-transfer surface, thereby very little on the impact of heat transfer efficiency.What 2, the utility model was provided with that an employing heat-insulating material makes defends combustion chamber, thereby the heat radiation that can reduce combustion zone improves ignition temperature, promote the stable ignition burning of fuel gas with low heat value, even can be by the temperature increase of defending combustion chamber interior arbitrfary point to more than the ignition point of combustion gas, realize positive displacement burning, thereby guarantee without the stability problems such as flame-out.3 of the present utility model defending between combustion chamber and flue have formed the less gas channel of cross-sectional area, can accelerate by flow velocity after making high-temperature flue gas enter gas channel, and then can improve the convection transfer rate of inboard wall of furnace.4, the utility model is limited in burning that to defend combustion indoor, compared with the traditional approach such with the whole flue of direct heating, only needs heating to defend the inner space of combustion chamber, can shorten radiator required time.5, the utility model is simple in structure, is easy to manufacture and install.The utility model can be widely used in small gas Industrial Boiler.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model (in figure, arrow is air flow direction);
Fig. 2 be Fig. 1 along A-A to view;
Fig. 3 be Fig. 1 along B-B to view.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figures 1 to 3, the utility model comprises that one is horizontally disposed flue body 1 cylindraceous, the two ends of flue body 1 are respectively arranged with an end plate 2,3, wherein the center of an end plate 2 offers one for connecting the centre bore 4 of gas burner (not shown), offers some equally distributed for connecting the circular hole 5 of fire tube (not shown) on another end plate 3.The inside of flue body 1 is provided with one and defends combustion chamber 6, defends combustion chamber 6 and is the horizontally disposed and airtight tubular structure in uncovered one end, one end, and its cross section can be the one in equilateral triangle, square and regular pentagon.Defending combustion chamber 6 is fillet structure with the junction of flue body 1 inwall.Defend the opening end of combustion chamber 6 near the end plate 2 of centre bore 4 place one sides, and and end plate 2 between leave spacing.
In a preferred embodiment, defend combustion chamber 6 length be flue body 1 length 1/3～2/3.
In a preferred embodiment, defend the combustion opening end of chamber 6 and the spacing of end plate 2 be flue body 1 internal diameter 5%～15%.
In a preferred embodiment, defending combustion chamber 6 adopts refractory temperature higher than the ceramic refractory of 1600 DEG C.
The utility model is installed in small gas Industrial Boiler and is around surrounded by water, the utility model in use, by gas burner (not shown) ejection fuel gas with low heat value and air, combustion gas and air enter flue body 1 with certain speed from the centre bore 4 of end plate 2, and are defending ignition in combustion chamber 6.Because defending combustion chamber 6, most burning heat releases is limited in to its inner space, therefore improved the temperature in combustion reaction region, is conducive to the stable ignition burning of fuel gas with low heat value.Subsequently, the high temperature gases recirculating that burning produces, to the opening end of defending combustion chamber 6, enters into by defending the interval of combustion chamber 6 and end plate 2 gas channel forming by defending combustion chamber 6 outer walls and flue body 1 inwall.Now, because gas channel cross-sectional area is less, the flow velocity of high-temperature flue gas is accelerated, and is conducive to promote the convection transfer rate between high-temperature flue gas and flue body 1 inwall.Finally, high-temperature flue gas enters the back cavity of flue body 1, enters fire tube (not shown) by the circular hole 5 on end plate 3.In said process, only the fit heat-transfer surface of part of flue body 1 and Wei Ran chamber 6 is occupied for the utility model, thereby has retained all the other most flue body heat-transfer surfaces.Meanwhile, the utility model can will defend the temperature increase of combustion 6 inner arbitrfary points, chamber to more than the ignition point of fuel gas with low heat value, realize positive displacement burning, thereby can guarantee without the stability problems such as flame-out.In addition, compared with the traditional approach such with the whole flue body 1 of direct heating, the utility model only needs heating to defend the inner space of combustion chamber 6, can shorten radiator required time.
The utility model only describes with above-described embodiment; structure, setting position and the connection thereof of each parts all can change to some extent; on the basis of technical solutions of the utility model; all improvement of indivedual parts being carried out according to the utility model principle and equivalents, all should not get rid of outside protection domain of the present utility model.
Claims (5)
1. the flue of a gas industry boiler, it is characterized in that: it comprises that one is horizontally disposed flue body cylindraceous, the two ends of described flue body are respectively arranged with an end plate, wherein described in one, the center of end plate offers one for connecting the centre bore of gas burner, offers some equally distributed for connecting the circular hole of fire tube on another end plate; What the inner horizontal of described flue body was provided with a tubular defends combustion chamber, described in defend combustion chamber cross section be one of equilateral triangle, square and regular pentagon, described in defend combustion chamber and described flue body junction be fillet structure; The described opening end of defending combustion chamber is towards the described end plate of described centre bore place one side and and between end plate, leave spacing described in this.
2. the flue of a kind of gas industry boiler as claimed in claim 1, is characterized in that: described in defend combustion chamber horizontal length be described flue body length 1/3～2/3.
3. the flue of a kind of gas industry boiler as claimed in claim 1, is characterized in that: described in defend the combustion opening end of chamber and the described end plate of described centre bore place one side spacing be described flue body internal diameter 5%～15%.
4. the flue of a kind of gas industry boiler as claimed in claim 2, is characterized in that: described in defend the combustion opening end of chamber and the described end plate of described centre bore place one side spacing be described flue body internal diameter 5%～15%.
5. the flue of a kind of gas industry boiler as described in any one in claim 1 to 4, is characterized in that: described in defend combustion chamber and adopt refractory temperature higher than the ceramic refractory of 1600 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154485.5U CN203758260U (en) | 2014-04-01 | 2014-04-01 | Furnace pipe of fuel gas industrial boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154485.5U CN203758260U (en) | 2014-04-01 | 2014-04-01 | Furnace pipe of fuel gas industrial boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203758260U true CN203758260U (en) | 2014-08-06 |
Family
ID=51253519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420154485.5U Expired - Fee Related CN203758260U (en) | 2014-04-01 | 2014-04-01 | Furnace pipe of fuel gas industrial boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203758260U (en) |
-
2014
- 2014-04-01 CN CN201420154485.5U patent/CN203758260U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20140806 Termination date: 20190401 |