CN202719584U - Heat recovery boiler utilizing residual heat resources of flue gas of coke oven - Google Patents
Heat recovery boiler utilizing residual heat resources of flue gas of coke oven Download PDFInfo
- Publication number
- CN202719584U CN202719584U CN 201220378915 CN201220378915U CN202719584U CN 202719584 U CN202719584 U CN 202719584U CN 201220378915 CN201220378915 CN 201220378915 CN 201220378915 U CN201220378915 U CN 201220378915U CN 202719584 U CN202719584 U CN 202719584U
- Authority
- CN
- China
- Prior art keywords
- economizer
- boiler
- waste heat
- residual heat
- flue gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 239000003546 flue gas Substances 0.000 title claims abstract description 21
- 239000000571 coke Substances 0.000 title abstract description 11
- 238000011084 recovery Methods 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002918 waste heat Substances 0.000 claims description 29
- 239000007789 gas Substances 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract 3
- 238000001704 evaporation Methods 0.000 abstract 3
- 238000004939 coking Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 235000010855 food raising agent Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
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Abstract
The utility model discloses a heat recovery boiler utilizing residual heat resources of flue gas of a coke oven. The heat recovery boiler utilizing the residual heat resources of thee flue gas of the coke oven comprises an evaporation system, a coal economizer and a boiler flue, wherein an upper boiler barrel and a lower boiler barrel which are connected through evaporation tube bundles are arranged inside the evaporation system, the upper boiler barrel is connected with the coal economizer used to convey high-pressure hot water, and the boiler flue is provided with a shut-off gate which is capable of enabling the flue gas to completely enter the heat recovery boiler. The heat recovery boiler utilizing the residual heat resources of thee flue gas of the coke oven is high in corrosion resistance, small in occupied space, and low in manufacturing cost. The flue gas discharging temperature is free from variation when being affected by the variation of flue gas parameters, and the use rate and the economic value of the residual heat resources of the coke oven are largely improved.
Description
Technical field
The utility model belongs to the coke oven residual heat resources and utilizes the field, relates in particular to a kind of waste heat boiler that utilizes coke-oven chimney gas residual heat resources.
Background technology
Along with advancing by leaps and bounds of low temperature exhaust heat recovery technology in recent years, the waste heat recovery Project Cost of iron and steel, coking industry significantly reduces, and simultaneously waste heat recovery efficient increases substantially.Coking coal is heated to about 1000 ℃ after (high-temperature retorting) technical process that produces coke, coke-stove gas and coking chemistry product by thermal decomposition and coking through gas-fired and is called coking.Because the smelter coke phosphorus content is high, the porosity is high, the characteristics of intensity large (particularly elevated temperature strength), so smelter coke is important fuel and the reducing agent of blast furnace ironmaking, also is proppant and the raising agent of whole blast furnace stock column.The coke-stove gas calorific capacity of coking by-product is high, is the excellent gas fuel of open hearth and heating furnace, is important energy component in integrated iron and steel works.The coking chemistry product is important industrial chemicals.Therefore coking production is an important step of modern steel industry.
After the flue gas that gas-fired produces compiles by flue by smoke stack emission in atmosphere, the temperature through the flue gas of smoke stack emission in the atmosphere is very high in fact, directly discharging causes energy waste.
Coke-oven chimney gas is by the flue gas through giving off after the regenerator heat exchange after the coke-stove gas burning, learns SO in the flue gas according to the characteristic of coke-stove gas
2Composition higher.When flue-gas temperature is down to one regularly, the SO in the flue gas
2And H
2O can be converted into sulfuric acid, and the tube wall of waste heat boiler is corroded.The waste heat boiler that utilizes in this field at present mostly is heat pipe waste heat boiler, and it is low that heat pipe waste heat boiler has a heat transfer temperature difference, need not the advantages such as shutdown maintenance after the corrosion and damage, has simultaneously floor space large, the shortcoming that cost is higher.
Summary of the invention
For solving the problem and blemish of above-mentioned middle existence, the utility model provides a kind of waste heat boiler that utilizes coke-oven chimney gas residual heat resources.This waste heat boiler Effective Raise utilization ratio and the economic worth of coke oven residual heat resources.
For achieving the above object, the utility model provides a kind of waste heat boiler that utilizes coke-oven chimney gas residual heat resources, comprising:
Vapo(u)rization system, economizer and boiler flue are provided with the upper drum and the lower drum that connect by steam-generating bank in the described vapo(u)rization system, upper drum is connected with the economizer of conveying high-pressure hot water; Be provided with the shutoff flashboard that can make flue gas all enter waste heat boiler on the described boiler flue.
The beneficial effect of the technical scheme that the utility model provides is:
The waste heat boiler decay resistance is high, occupation of land and cost low and exhaust gas temperature when being subject to the Gas Parameters fluctuation and do not change etc., has significantly improved utilization ratio and the economic worth of coke oven residual heat resources.
Description of drawings
Fig. 1 is waste heat boiler the first example structure schematic diagram that the utility model provides;
Fig. 2 is waste heat boiler the second example structure schematic diagram that the utility model provides.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model embodiment is described in further detail:
Embodiment 1
As shown in Figure 1, showed the waste heat boiler that utilizes coke-oven chimney gas residual heat resources, comprise vapo(u)rization system, economizer and boiler flue 7, be provided with the upper drum 3 and the lower drum 1 that connect by steam-generating bank 2 in the described vapo(u)rization system, upper drum is connected with the economizer of conveying high-pressure hot water; Be provided with the shutoff flashboard 9 that can make flue gas all enter waste heat boiler on the described boiler flue.
Above-mentioned economizer comprises first order economizer 4 and second level economizer 5, and first order economizer and second level economizer are the heat pipe-type structure.
Also be provided with in the above-mentioned waste heat boiler the flue gas suction to the blower fan 6 of boiler chimney 10 and carry deaerated water to the feed pump 8 of second level economizer, second level economizer heats deaerated water, and the working-medium water after the heating enters to first order economizer and continues heating.Be divided into two-way from the high-pressure water heating of first order economizer after out: in one tunnel upper drum that enters the vapo(u)rization system, water is entered to absorb heat in the steam-generating bank by upper drum and becomes steam water interface, water in the steam water interface enters lower drum, steam enters upper drum, form steam/water circulating, the saturated vapor of generation leads to the user with the steam fairlead.The excess of heat water extraction that another road produces is for the user.
Above-mentioned feed pump is the frequency conversion feed pump.
Be provided with control valve on the above-mentioned shutoff flashboard.
Be provided with control valve between above-mentioned first order economizer and second level economizer, and one group of economizer in the first economizer and the second economizer series operation or short circuit the first economizer and the second economizer, that is: when exhaust gas temperature higher, in the time of on acid dew point, two groups of economizer series operations; When exhaust gas temperature is lower, in the time of under acid dew point, for guaranteeing unit safety operation, can utilize the respective valve group to regulate the excess of heat water yield with second level economizer off-the-line and by the frequency conversion feed pump, control exhaust gas temperature by this dual mode.
Steam-generating bank in the vapo(u)rization system comprise tedge and under will manage, wherein, tedge and down-comer are steel pipe, intraductal working medium is water.Because the evaporator section caloric receptivity is large, and flue-gas temperature is higher, on acid dew point, be difficult for heating surface is caused corrosion, for improving heat exchange efficiency, reduce the economy that heating surface improves project, adopt steel-tube construction.
The present embodiment is for realizing UTILIZATION OF VESIDUAL HEAT IN, utilize blower fan with the flue gas suction to residual heat boiler for exchanging heat, enter chimney discharged to atmosphere.At original flue the shutoff flashboard is set, makes flue gas all enter waste heat boiler.
Embodiment 2
This embodiment and the first embodiment distinguish part and be: according to user's thermic load requirement, set up a superheater 11 on the first embodiment basis, this superheater is used for the saturated vapor that upper drum sends, and saturated vapor produces superheated steam after entering superheater.All the other and the first embodiment duplicate, and are not described in detail here.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and is all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. waste heat boiler that utilizes coke-oven chimney gas residual heat resources, comprise vapo(u)rization system, economizer and boiler flue (7), it is characterized in that, be provided with the upper drum (3) and the lower drum (1) that connect by steam-generating bank (2) in the described vapo(u)rization system, upper drum is connected with the economizer of conveying high-pressure hot water; Be provided with the shutoff flashboard (9) that can make flue gas all enter waste heat boiler on the described boiler flue.
2. the waste heat boiler that utilizes coke-oven chimney gas residual heat resources according to claim 1 is characterized in that, described economizer comprises first order economizer (4) and second level economizer (5), and first order economizer and second level economizer are the heat pipe-type structure.
3. the waste heat boiler that utilizes coke-oven chimney gas residual heat resources according to claim 1, it is characterized in that, also be provided with in the described waste heat boiler the flue gas suction to the blower fan (6) of boiler chimney (10) and carry deaerated water to the feed pump (8) of second level economizer.
4. the waste heat boiler that utilizes coke-oven chimney gas residual heat resources according to claim 3 is characterized in that, described feed pump is the frequency conversion feed pump.
5. the waste heat boiler that utilizes coke-oven chimney gas residual heat resources according to claim 1 is characterized in that, is provided with control valve on the described shutoff flashboard.
6. the waste heat boiler that utilizes coke-oven chimney gas residual heat resources according to claim 2 is characterized in that, one group of economizer in described the first economizer and the second economizer series operation or short circuit the first economizer and the second economizer.
7. the waste heat boiler that utilizes coke-oven chimney gas residual heat resources according to claim 1 is characterized in that, described steam-generating bank comprise tedge and under will manage.
8. the waste heat boiler that utilizes coke-oven chimney gas residual heat resources according to claim 7 is characterized in that, described tedge and down-comer are steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220378915 CN202719584U (en) | 2012-08-01 | 2012-08-01 | Heat recovery boiler utilizing residual heat resources of flue gas of coke oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220378915 CN202719584U (en) | 2012-08-01 | 2012-08-01 | Heat recovery boiler utilizing residual heat resources of flue gas of coke oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202719584U true CN202719584U (en) | 2013-02-06 |
Family
ID=47621407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220378915 Expired - Fee Related CN202719584U (en) | 2012-08-01 | 2012-08-01 | Heat recovery boiler utilizing residual heat resources of flue gas of coke oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202719584U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061561A (en) * | 2014-06-20 | 2014-09-24 | 陕西龙门煤化工有限责任公司 | System for recovering waste heat of flue gas of coke oven |
| CN110625725A (en) * | 2019-10-24 | 2019-12-31 | 广西霄能绿色科技有限公司 | Optimized heat supply method and equipment for bamboo board processing |
-
2012
- 2012-08-01 CN CN 201220378915 patent/CN202719584U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061561A (en) * | 2014-06-20 | 2014-09-24 | 陕西龙门煤化工有限责任公司 | System for recovering waste heat of flue gas of coke oven |
| CN110625725A (en) * | 2019-10-24 | 2019-12-31 | 广西霄能绿色科技有限公司 | Optimized heat supply method and equipment for bamboo board processing |
| CN110625725B (en) * | 2019-10-24 | 2023-11-07 | 广西霄能绿色科技有限公司 | Optimized heat supply method and equipment for bamboo board processing |
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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: 20130206 Termination date: 20200801 |