CN101699164A - Radiation and convection integrated waste heat boiler with double-layer water cooling wall and radiation screen structure - Google Patents
Radiation and convection integrated waste heat boiler with double-layer water cooling wall and radiation screen structure Download PDFInfo
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- CN101699164A CN101699164A CN200910309656A CN200910309656A CN101699164A CN 101699164 A CN101699164 A CN 101699164A CN 200910309656 A CN200910309656 A CN 200910309656A CN 200910309656 A CN200910309656 A CN 200910309656A CN 101699164 A CN101699164 A CN 101699164A
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Abstract
The invention provides a radiation and convection integrated waste heat boiler with a double-layer water cooling wall and radiation screen structure, and relates to a waste heat boiler. The invention aims to solve the problem that in the conventional gasified synthetic gas full-heat recovery, double equipment of a radiation waste heat boiler and a convection waste heat boiler has complicated structure, high equipment investment and large occupied space. Each first hanging rod is fixedly connected with a first upper colleting chamber; the upper end of a heating surface of an internal-layer water cooling wall is communicated with the first upper collecting chamber, while the lower end is communicated with a first lower collecting chamber; each support is fixedly connected with a second upper collecting chamber; the upper end of the heating surface of an external-layer water cooling wall is communicated with the second upper collecting chamber, while the lower end is communicated with the second upper collecting chamber; each second hanging rod is fixedly connected with a third upper collecting chamber; and the upper end of the heating surface of a radiation screen is communicated with the third upper collecting chamber, while the lower end is communicated with the third lower collecting chamber. The radiation and convection integrated waste heat boiler is used for the synthetic gas full-heat recovery of a gasifying island in a coal integrated combined circulation system.
Description
Technical field
The present invention relates to a kind of waste heat boiler.
Background technology
Waste heat boiler is the important sensible heat reclaimer of derived energy chemical industry, especially in integrated gasification combined cycle plants and the Coal Chemical Industry process, product after the coal gasification is high temperature, the high pressure synthesis gas of reducing atmosphere, its pressure often is higher than 1MPa, temperature is higher than 1000 ℃, effectively this part the physics sensible heat that reclaims synthesis gas can improve system thermal efficiency or generating efficiency greatly, helps system-wide energy-saving and emission-reduction.
The target that the full sensible heat of traditional synthesis gas reclaims is that the synthesis gas temperature is reduced to about 300 ℃.Full heat recovering device generally is divided into the recovery of high temperature section sensible heat and radiation waste heat boiler, low-temperature zone sensible heat reclaim and convection current waste heat boiler two parts.For traditional radiation waste heat boiler, adopt individual layer or double-deck water wall structure usually, water-cooling wall is fin panel casing.For avoiding heat exchange inhomogeneous, its water-cooling wall is generally columnar structured, but all there is great difficulty in the processing of installation, the operation of the round water-cooling wall that maximizes and the annular header that is connected with water-cooling wall.For avoiding slag that gasification furnace discharges and potassium, sodium salt coking or deposition in waste heat boiler, influence the normal operation of boiler, require arriving inner core water-cooling wall bottom, before the counter-rotating of inner/outer tube interlayer, the synthesis gas temperature will be reduced to below 650 ℃, and ash separation is more than 60%.Absorbing temperature is very difficult at the sensible heat of the synthesis gas below 650 ℃ for the radiation waste heat boiler, this is because temperature will be based on heat convection in the heat exchange form of the synthesis gas below 650 ℃, and that the operating characteristic of fin panel casing has determined that this heating surface absorbs the efficient of advection heat is very low.Like this, drop to below 650 ℃ in order to make the synthesis gas temperature, the internal layer water-cooling wall of radiation waste heat boiler need be increased, and along with the increase of individual layer heating surface height, pressure housing also increases thereupon, has improved the consumption of material greatly.For this reason, need add multi-form in radiation waste heat boiler back and convection current waste heat boiler structure, form the arrangement that radiation waste heat boiler and two equipment of convection current waste heat boiler absorb the full sensible heat of synthesis gas jointly.The problem of bringing like this is: the full cement sensible heat recovery system of synthesis gas is made up of radiation waste heat boiler and two equipment of convection current waste heat boiler, and equipment investment is big, and it is big to take up room, and the simultaneity factor reliability of operation is also owing to the complexity of equipment is affected.
Summary of the invention
The objective of the invention is in order to solve in the full sensible heat recovery of existing synthesis gas from coal gasification, the active/standby devices arrangement complex structure of radiation waste heat boiler and convection current waste heat boiler, equipment investment is big, the big problem that takes up room has proposed radiation and convection current integrated waste heat boiler that a kind of double-deck water-cooling wall adds the radiation shield structure.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: described waste heat boiler comprises pressure housing, jockey and slag-draining device, the upper end of described pressure housing sidewall is provided with syngas outlet, the jockey that is communicated with the gasification furnace afterbody is housed on the upper cover of described pressure housing, described slag-draining device is connected with the lower end of pressure housing, described waste heat boiler also comprises internal layer water-cooling wall assembly, outer water-cooling wall assembly, one group of radiation shield assembly, described internal layer water-cooling wall assembly is by first water inlet pipe, first fairlead, first upper collecting chamber, the first next part case, a plurality of first suspension rods and internal layer water wall surface constitute, one end of each first suspension rod and the upper cover of pressure housing are affixed, the other end of each first suspension rod and first upper collecting chamber are affixed, the upper end of described internal layer water wall surface is communicated with first upper collecting chamber, the lower end of described internal layer water wall surface is communicated with the first next part case, one end of each first water inlet pipe and pressure housing are affixed and be located at the outside of pressure housing, the other end of each first water inlet pipe is communicated with the first next part case, one end of each first fairlead and the upper cover of pressure housing are affixed and be located at the outside of the upper cover of pressure housing, the other end of each first fairlead is communicated with first upper collecting chamber, described outer water-cooling wall assembly is by second water inlet pipe, second fairlead, second upper collecting chamber, the second next part case, a plurality of bracing frames and outer water wall surface constitute, one end of each bracing frame and the inwall of pressure housing are affixed, the other end of each bracing frame and second upper collecting chamber are affixed, each bracing frame is located between pressure housing and the internal layer water wall surface, the upper end of described outer water wall surface is communicated with second upper collecting chamber, the lower end of described outer water wall surface is communicated with the second next part case, one end of each second water inlet pipe and pressure housing are affixed and be located at the outside of pressure housing, the other end of each second water inlet pipe is communicated with the second next part case, one end of each second fairlead and pressure housing are affixed and be located at the outside of pressure housing, the other end of each second fairlead is communicated with second upper collecting chamber, described one group of radiation shield assembly is by the 3rd water inlet pipe, the 3rd fairlead, the 3rd upper collecting chamber, the 3rd next part case, a plurality of second suspension rods and radiation shield heating surface constitute, the end of each second suspension rod 5-and the upper cover of pressure housing are affixed, the other end of each second suspension rod and the 3rd upper collecting chamber are affixed, the upper end of described radiation shield heating surface is communicated with the 3rd upper collecting chamber, the lower end of described radiation shield heating surface is communicated with the 3rd next part case, one end of each the 3rd water inlet pipe and pressure housing are affixed and be located at the outside of pressure housing, the other end of each the 3rd water inlet pipe is communicated with the 3rd next part case, one end of each the 3rd fairlead and the upper cover of pressure housing are affixed and be located at the outside of the upper cover of pressure housing, the other end of each the 3rd fairlead is communicated with the 3rd upper collecting chamber, described a plurality of radiation shield heating surface is arranged in the internal layer water wall surface, the cross section of described internal layer water wall surface and the cross section of outer water wall surface are regular polygon, the limit number of the regular polygon cross section of internal layer water wall surface is identical with the limit number of the regular polygon cross section of outer water wall surface, and the limit of the drift angle of the regular polygon cross section of internal layer water wall surface and the regular polygon cross section of outer water wall surface is oppositely arranged.
The present invention has following beneficial effect: inside and outside double-deck water wall surface of the present invention adopts regular polygon to arrange, the cross section of internal layer water wall surface is that the cross section of the drift angle of regular polygon and outer water wall surface is that the limit of regular polygon is oppositely arranged, the advantage of this structure is that inside and outside double-deck regular polygon water wall surface constitutes the main heat exchange face, the radiation shield heating surface is set as auxiliary heating surface along internal layer water wall surface inboard, wherein internal layer water wall surface inboard is the primary radiation heating surface with the radiation shield heating surface, high-temperature synthesis gas fully and this heating surface heat exchange the time, it is carried lime-ash secretly and is also effectively separated in internal layer water wall surface inboard; And the interior water wall surface outside constitutes auxiliary radiation and convection heating surface with the inboard interlayer of outer water wall surface, the synthesis gas temperature is reduced to below 650 ℃, carry the lime-ash share secretly and be lower than 60%, the syngas outlet temperature can be reduced to 300 ℃, therefore use the present invention can reduce by a convection current waste heat boiler, the investment that this greatly reduces equipment has reduced the equipment occupation of land.
Description of drawings
Fig. 1 is an overall structure front view of the present invention, and Fig. 2 is the A-A cutaway view of Fig. 1.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1 and Fig. 2, the waste heat boiler of present embodiment comprises pressure housing 1, jockey 2 and slag-draining device 6, the upper end of described pressure housing 1 sidewall is provided with syngas outlet 7, the jockey 2 that is communicated with the gasification furnace afterbody is housed on the upper cover 1-1 of described pressure housing 1, described slag-draining device 6 is connected with the lower end of pressure housing 1, described waste heat boiler also comprises internal layer water-cooling wall assembly 3, outer water-cooling wall assembly 4, one group of radiation shield assembly 5, described internal layer water-cooling wall assembly 3 is by the first water inlet pipe 3-1, the first fairlead 3-2, the first upper collecting chamber 3-3, the first next part case 3-4, a plurality of first suspension rod 3-5 and internal layer water wall surface 3-6 constitute, the end of each first suspension rod 3-5 and the upper cover 1-1 of pressure housing 1 are affixed, the other end of each first suspension rod 3-5 and the first upper collecting chamber 3-3 are affixed, the upper end of described internal layer water wall surface 3-6 is communicated with the first upper collecting chamber 3-3, the lower end of described internal layer water wall surface 3-6 is communicated with the first next part case 3-4, the end of each first water inlet pipe 3-1 and pressure housing 1 are affixed and be located at the outside of pressure housing 1, the other end of each first water inlet pipe 3-1 is communicated with the first next part case 3-4, the end of each first fairlead 3-2 and the upper cover 1-1 of pressure housing 1 are affixed and be located at the outside of the upper cover 1-1 of pressure housing 1, the other end of each first fairlead 3-2 is communicated with the first upper collecting chamber 3-3, described outer water-cooling wall assembly 4 is by the second water inlet pipe 4-1, the second fairlead 4-2, the second upper collecting chamber 4-3, the second next part case 4-4, a plurality of bracing frame 4-5 and outer water wall surface 4-6 constitute, the end of each bracing frame 4-5 and the inwall of pressure housing 1 are affixed, the other end of each bracing frame 4-5 and the second upper collecting chamber 4-4 are affixed, each bracing frame 4-5 is located between pressure housing 1 and the internal layer water wall surface 3-6, the upper end of described outer water wall surface 4-6 is communicated with the second upper collecting chamber 4-4, the lower end of described outer water wall surface 4-6 is communicated with the second next part case 4-4, the end of each second water inlet pipe 4-1 and pressure housing 1 are affixed and be located at the outside of pressure housing 1, the other end of each second water inlet pipe 4-1 is communicated with the second next part case 4-4, the end of each second fairlead 4-2 and pressure housing 1 are affixed and be located at the outside of pressure housing 1, the other end of each second fairlead 4-2 is communicated with the second upper collecting chamber 4-3, described one group of radiation shield assembly 5 is by the 3rd water inlet pipe 5-1, the 3rd fairlead 5-2, the 3rd upper collecting chamber 5-3, the 3rd next part case 5-4, a plurality of second suspension rod 5-5 and radiation shield heating surface 5-6 constitute, the end of each second suspension rod 5-5 and the upper cover 1-1 of pressure housing 1 are affixed, the other end of each second suspension rod 5-5 and the 3rd upper collecting chamber 5-3 are affixed, the upper end of described radiation shield heating surface 5-6 is communicated with the 3rd upper collecting chamber 5-3, the lower end of described radiation shield heating surface 5-6 is communicated with the 3rd next part case 5-4, the end of each the 3rd water inlet pipe 5-1 and pressure housing 1 are affixed and be located at the outside of pressure housing 1, the other end of each the 3rd water inlet pipe 5-1 is communicated with the 3rd next part case 5-4, the end of each the 3rd fairlead 5-2 and the upper cover 1-1 of pressure housing 1 are affixed and be located at the outside of the upper cover 1-1 of pressure housing 1, the other end of each the 3rd fairlead 5-2 is communicated with the 3rd upper collecting chamber 5-3, described a plurality of radiation shield heating surface 5-6 is arranged in the internal layer water wall surface 3-6, the cross section of described internal layer water wall surface 3-6 and the cross section of outer water wall surface 4-6 are regular polygon, the limit number of the regular polygon cross section of internal layer water wall surface 3-6 is identical with the limit number of the regular polygon cross section of outer water wall surface 4-6, and the limit of the drift angle of the regular polygon cross section of internal layer water wall surface 3-6 and the regular polygon cross section of outer water wall surface 4-6 is oppositely arranged.
The specific embodiment two: present embodiment is described in conjunction with Fig. 1 and Fig. 2, the limit number of the regular polygon cross section of the internal layer water wall surface 3-6 of present embodiment is 6-12, the advantage of this kind syndeton is the layout compactness of radiation shield 5 in stove, made full use of the flow process of synthesis gas in internal layer water wall surface 3-6, increased the heat exchange area of internal layer water wall surface 3-6 inboard, saved furnace inner space, this structure is formed centrally the mobile space of spacious synthesis gas in radiation shield heating surface 5-6 simultaneously, is difficult for slagging scorification.Other compositions and annexation are identical with the specific embodiment one.
The specific embodiment three: present embodiment is described in conjunction with Fig. 1 and Fig. 2, the quantity of described a plurality of radiation shield heating surface 5-6 of present embodiment is identical with the limit number of the regular polygon cross section of internal layer water wall surface 3-6, the advantage of this kind syndeton is to have maximally utilised internal layer water wall surface 3-6 volume inside, helps saving furnace inner space.Other compositions and annexation are identical with the specific embodiment one.
The specific embodiment four: present embodiment is described in conjunction with Fig. 1 and Fig. 2, each drift angle place correspondence of the regular polygon cross section of the internal layer water wall surface 3-6 of present embodiment is provided with a radiation shield heating surface 5-6, the advantage of this kind syndeton is that the drift angle of radiation shield heating surface 5-6 and internal layer water wall surface 3-6 is corresponding one by one, help eliminating the flow dead of synthesis gas at internal layer water-cooling wall 3 drift angle places, strengthened heat exchange efficiency, guarantee the cross-sectional area maximum in spacious space, the center that surrounds by radiation shield simultaneously, helped avoiding synthesis gas slagging scorification on radiation shield.Other compositions and annexation are identical with the specific embodiment one.
Operation principle: synthesis gas enters waste heat boiler from the inlet of upper of furnace body, flow through internal layer water wall surface 3-6 inside from top to bottom, carry out heat exchange with internal layer water wall surface 3-6 inboard and radiation shield heating surface 5-6, arrive internal layer water wall surface 3-6, fuel gas temperature is reduced to below 650 ℃, carries the lime-ash share secretly and is lower than 60%; Anti-turnback makes progress in the exit of internal layer water wall surface 3-6 lower end, bottom-up again annular space by being surrounded by internal layer water wall surface 3-6 and outer water wall surface 4-6, carry out heat exchange with the internal layer water wall surface 3-6 outside and outer water wall surface 4-6 inboard, reduce the synthesis gas temperature, the full sensible heat of finishing synthesis gas reclaims.
Claims (4)
1. a double-deck water-cooling wall adds the radiation and the convection current integrated waste heat boiler of radiation shield structure, described waste heat boiler comprises pressure housing (1), jockey (2) and slag-draining device (6), the upper end of described pressure housing (1) sidewall is provided with syngas outlet (7), the jockey (2) that is communicated with the gasification furnace afterbody is housed on the upper cover (1-1) of described pressure housing (1), described slag-draining device (6) is connected with the lower end of pressure housing (1), it is characterized in that described waste heat boiler also comprises internal layer water-cooling wall assembly (3), outer water-cooling wall assembly (4), one group of radiation shield assembly (5), described internal layer water-cooling wall assembly (3) is by first water inlet pipe (3-1), first fairlead (3-2), first upper collecting chamber (3-3), the first next part case (3-4), a plurality of first suspension rods (3-5) and internal layer water wall surface (3-6) constitute, the upper cover (1-1) of one end of each first suspension rod (3-5) and pressure housing (1) is affixed, the other end of each first suspension rod (3-5) and first upper collecting chamber (3-3) are affixed, the upper end of described internal layer water wall surface (3-6) is communicated with first upper collecting chamber (3-3), the lower end of described internal layer water wall surface (3-6) is communicated with the first next part case (3-4), one end of each first water inlet pipe (3-1) and pressure housing (1) are affixed and be located at the outside of pressure housing (1), the other end of each first water inlet pipe (3-1) is communicated with the first next part case (3-4), the upper cover (1-1) of one end of each first fairlead (3-2) and pressure housing (1) is affixed and be located at the outside of the upper cover (1-1) of pressure housing (1), the other end of each first fairlead (3-2) is communicated with first upper collecting chamber (3-3), described outer water-cooling wall assembly (4) is by second water inlet pipe (4-1), second fairlead (4-2), second upper collecting chamber (4-3), the second next part case (4-4), a plurality of bracing frames (4-5) and outer water wall surface (4-6) constitute, the inwall of one end of each bracing frame (4-5) and pressure housing (1) is affixed, the other end of each bracing frame (4-5) and second upper collecting chamber (4-4) are affixed, each bracing frame (4-5) is located between pressure housing (1) and the internal layer water wall surface (3-6), the upper end of described outer water wall surface (4-6) is communicated with second upper collecting chamber (4-4), the lower end of described outer water wall surface (4-6) is communicated with the second next part case (4-4), one end of each second water inlet pipe (4-1) and pressure housing (1) are affixed and be located at the outside of pressure housing (1), the other end of each second water inlet pipe (4-1) is communicated with the second next part case (4-4), one end of each second fairlead (4-2) and pressure housing (1) are affixed and be located at the outside of pressure housing (1), the other end of each second fairlead (4-2) is communicated with second upper collecting chamber (4-3), described one group of radiation shield assembly (5) is by the 3rd water inlet pipe (5-1), the 3rd fairlead (5-2), the 3rd upper collecting chamber (4-3), the 3rd next part case (5-4), a plurality of second suspension rods (5-5) and radiation shield heating surface (5-6) constitute, the upper cover (1-1) of one end of each second suspension rod (5-5) and pressure housing (1) is affixed, the other end of each second suspension rod (5-5) and the 3rd upper collecting chamber (5-3) are affixed, the upper end of described radiation shield heating surface (5-6) is communicated with the 3rd upper collecting chamber (5-3), the lower end of described radiation shield heating surface (5-6) is communicated with the 3rd next part case (5-4), one end of each the 3rd water inlet pipe (5-1) and pressure housing (1) are affixed and be located at the outside of pressure housing (1), the other end of each the 3rd water inlet pipe (5-1) is communicated with the 3rd next part case (5-4), the upper cover (1-1) of one end of each the 3rd fairlead (5-2) and pressure housing (1) is affixed and be located at the outside of the upper cover (1-1) of pressure housing (1), the other end of each the 3rd fairlead (5-2) is communicated with the 3rd upper collecting chamber (5-3), described a plurality of radiation shield heating surfaces (5-6) are arranged in the internal layer water wall surface (3-6), the cross section of the cross section of described internal layer water wall surface (3-6) and outer water wall surface (4-6) is regular polygon, the limit number of the regular polygon cross section of internal layer water wall surface (3-6) is identical with the limit number of the regular polygon cross section of outer water wall surface (4-6), and the limit of the regular polygon cross section of the drift angle of the regular polygon cross section of internal layer water wall surface (3-6) and outer water wall surface (4-6) is oppositely arranged.
2. add the radiation and the convection current integrated waste heat boiler of coil arrangement according to the described double-deck water-cooling wall of claim 1, the limit number that it is characterized in that the regular polygon cross section of described internal layer water wall surface (3-6) is 6-12.
3. add the radiation and the convection current integrated waste heat boiler of coil arrangement according to claim 1 or 2 described double-deck water-cooling walls, it is characterized in that the quantity of described a plurality of radiation shield heating surfaces (5-6) is identical with the limit number of the regular polygon cross section of internal layer water wall surface (3-6).
4. the radiation and the convection current integrated waste heat boiler that add coil arrangement according to the described double-deck water-cooling wall of claim 3 is characterized in that each drift angle place correspondence of the regular polygon cross section of internal layer water wall surface (3-6) is provided with a radiation shield heating surface (5-6).
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| CN200910309656A CN101699164A (en) | 2009-11-13 | 2009-11-13 | Radiation and convection integrated waste heat boiler with double-layer water cooling wall and radiation screen structure |
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| CN200910309656A CN101699164A (en) | 2009-11-13 | 2009-11-13 | Radiation and convection integrated waste heat boiler with double-layer water cooling wall and radiation screen structure |
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| CN103013577A (en) * | 2012-12-11 | 2013-04-03 | 中国东方电气集团有限公司 | Integral rotational radiation preheating mixing energy utilization device with flue gas chilling |
| CN103013579A (en) * | 2012-12-11 | 2013-04-03 | 中国东方电气集团有限公司 | Integrated sarciniform radiation preheating hybrid heat recovery device with flue gas chilling function |
| CN103013578A (en) * | 2012-12-11 | 2013-04-03 | 中国东方电气集团有限公司 | Integrated bunch type radiant boiler and preheating boiler mixed energy utilization device |
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| CN106545829A (en) * | 2016-12-13 | 2017-03-29 | 北京清创晋华科技有限公司 | A kind of only upright screen type radiation recuperation of heat component for being applied to gasification furnace |
| CN109355110A (en) * | 2018-11-19 | 2019-02-19 | 清华大学 | Radiation waste pot heat recovering device |
| CN111503609A (en) * | 2020-04-09 | 2020-08-07 | 哈尔滨锅炉厂有限责任公司 | High-efficient low-cost pressure boost radiation waste boiler heating surface structure |
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