CN202016973U - Coke oven for efficiently recycling heat of waste gas - Google Patents
Coke oven for efficiently recycling heat of waste gas Download PDFInfo
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- CN202016973U CN202016973U CN2010206866999U CN201020686699U CN202016973U CN 202016973 U CN202016973 U CN 202016973U CN 2010206866999 U CN2010206866999 U CN 2010206866999U CN 201020686699 U CN201020686699 U CN 201020686699U CN 202016973 U CN202016973 U CN 202016973U
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- flue
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Abstract
The utility model relates to the fields of metallurgy and coking, in particular to a coke oven for recycling heat of waste gas. The coke oven comprises combustion chamber vertical flame channels, a waste gas channel, radiation chambers, double-pipe type heat exchange devices, an air distribution chamber and a small waste gas flue channel, wherein the double-pipe type heat exchange devices are arranged in the radiation chambers; each double-pipe type heat exchange device consists of an inner pipe and an outer pipe to form a sleeve type structure; an air inlet is formed on the lower part of the inner pipe; the top end of the inner pipe is communicated with the outer pipe; the upper part of the outer pipe has a seal head structure; an annular channel between the inner pipe and the outer pipe serves as a heat-exchanged air descending channel; a plurality of sections of air supply devices are arranged in the combustion chamber vertical flame channels; and a plurality of air lead-in openings at different heights are formed in the plurality of sections of air supply devices in the height directions of the vertical flame channels. The utility model has the advantages that: the coke oven has small oven body structure volume, high utilization rate of a combustion chamber within effective burning time and high heat recycling rate.
Description
Technical field
The utility model relates to metallurgical coking field, particularly a kind of coking furnace shaft structure.
Background technology
In the prior art,, utilize used heat that combustion air is carried out preheating the heat-economy of coke oven is improved by heat exchange type and heat accumulating type system.Along with the development of coke oven technology, it is found that the heat accumulating type system has more superiority than heat exchange type system aspect pyrology.On the one hand because the heat exchange type device is subjected to limitation of size.On the other hand because the heat exchange type system can only use the relatively poor stupalith of thermal conductivity at that time.And the heat accumulating type coke oven is than the heat exchange type coke oven, and its needs increase heat exchange body volume on a small quantity can improve heat recovery efficiency, and can use conventional refractory materials to build by laying bricks or stones easily.
But the shortcoming that the heat accumulating type coke oven exists is: 1) owing to will improve thermo-efficiency, its furnace binding will certainly be high, big, complicated.2) to cooperate heat exchange, must carry out the exchange of coal gas-air-coal gas, promptly must be arranged swap time.Therefore the active combustion time of its single quirk has only utilized 47%.
Compare with the heat accumulating type coke oven, the heat exchange type coke oven has following advantage: heating does not need regular commutation, burning to regulate comparatively accurate; Can effectively raise combustion time; Overcome the regenerator coke oven because heating needs commutation regularly, the low problem of active combustion time availability that causes; Oxygen level can reach about 2% easily in the waste gas.So low waste gas oxygen level is to use the coke oven of heat accumulating type heating system to be beyond one's reach following of current design construction state.
Summary of the invention
The purpose of this utility model provides that a kind of furnace binding volume is little, combustion chamber active combustion time availability height, the coke oven of the recovery coke oven exhaust gas heat that heat recovery efficiency is high.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of coke oven of high efficiente callback waste-gas heat comprises combustion chamber flue, flue, radiation chamber, double hose heat-exchanger rig, air chamber, waste gas bottom flue passage;
The flue bottom is a radiation chamber, and the double hose heat-exchanger rig is arranged in the radiation chamber, and the double hose heat-exchanger rig is formed sleeve type structure by interior pipe, outer tube, and interior pipe bottom is a gas inlet, and interior pipe top communicates with outer tube, and outer tube top is end enclosure structure; Circular channel between interior pipe and the outer tube is the down going channel of air after the heat exchange;
Double hose heat-exchanger rig bottom is the air chamber, and the down going channel of air communicates with the air chamber after the heat exchange; The air chamber is connected with the combustion chamber flue;
The radiation chamber bottom is communicated with the waste gas bottom flue of coking chamber bottom by waste gas bottom flue passage.
Be provided with the multistage air and infeed device in the flue of combustion chamber, the multistage air infeeds device is provided with a plurality of different heights on the flue short transverse air introducing port; The coke-oven gas nozzle is arranged at the flue bottom, and flue top communicates with flue by crossing over the hole; Be provided with partition wall between flue and the flue.
Described combustion chamber flue, multistage air infeed device, flue, radiation chamber, double hose heat-exchanger rig, air chamber, waste gas bottom flue passage, constitute burning and heat-exchange system, this burning and heat-exchange system are divided into two groups, on the coke oven longitudinal direction, be divided into two independently systems by the combustion chamber across bulkhead.
Described waste gas bottom flue divides flue to be connected with the high-temp waste gas that is positioned at coke side; The high-temp waste gas of coke side divides flue to be connected with the coal pre-heating system by connecting passage.
Compared with prior art, the beneficial effects of the utility model are:
1. the coking furnace shaft height significantly reduces, and helps reducing coking furnace shaft and builds by laying bricks or stones and use refractory materials.
2. the coking furnace shaft height significantly reduces, and helps supporting with it coke over machinery height and reduces, and weight reduces, thereby reduces investment.
3. owing to cancelled reversing system, the original exchange apparatus of regenerator coke oven and then can cancel, thus can reduce investment.
4. because the heat exchange of the utility model coke oven does not need to commutate, the active combustion time of its single quirk has only 47% utilization ratio can be increased to 98% utilization ratio by the heat accumulating type coke oven.Per hour interrupted 1 minute, and be used for the removing carbon deposit time jet pipe under the coke-oven gas.
5. this coke oven is air-supplied to minute multistage at height, and every section air all can be regulated.Help reducing coke-oven gas incendiary severe degree; Adopt the double hose heat-exchanger rig simultaneously, waste gas does not contact with air, thereby has guaranteed that the oxygen level in the waste gas is about 2%.These 2 the NOx content that help reducing in the waste gas are more conducive to environmental protection.
6. this coke oven two stages of using are reclaimed waste-gas heat, enter smoke stack emission than the direct waste gas of conventional heat accumulating type coke oven, and are better to the heat recuperation rate, and help energy-conserving and environment-protective.
Description of drawings
Fig. 1 is a coking furnace shaft layout drawing of the present utility model;
Fig. 2 is the utility model coking furnace shaft combustion chamber longitudinal sectional view;
Fig. 3 is the structure iron of double hose heat-exchanger rig;
Fig. 4 is the system diagram that reclaims waste-gas heat;
Fig. 5 is the inner airing system figure of coking furnace shaft.
Among the figure: a-combustion chamber b-coking chamber c-furnace roof d-coaling three sections air of the hole e-rising pore 1-double hose heat-exchanger rig 2-3-of air chamber radiation chamber 4-infeed device 5-level across pipe 13-outer tube 14-end enclosure structure 15-gas inlet 16-heat exchange in the hole 6-flue 7-waste gas bottom flue passage 8-waste gas bottom flue 9-gasburner 10-combustion chamber across bulkhead 11-flue 12-more after air
Embodiment
Describe furnace binding of the present utility model and waste-gas heat removal process in detail below in conjunction with accompanying drawing.
See Fig. 1, a kind of coke oven, comprise combustion chamber a, coking chamber b, coking coal is by the hole d that coalings of the furnace roof c coking chamber b that packs into, by providing heat that the shove charge coal is smelt coke with coking chamber b combustion chamber a alternately, the raw gas of generation enters gas recovery system by the rising pore e discharge at furnace roof position.
See Fig. 2, coke oven combustion chamber comprises that combustion chamber flue 11, multistage air infeed device 4, flue 6, radiation chamber 3, double hose heat-exchanger rig 1, air chamber 2, waste gas bottom flue passage 7, constitute burning and heat-exchange system, this burning and heat-exchange system are divided into two groups, on the coke oven longitudinal direction, above-mentioned burning and heat-exchange system are divided into two independently systems by combustion chamber across bulkhead 10.
Be provided with the multistage air in the flue of combustion chamber and infeed device 4, the multistage air infeeds device 4 is provided with a plurality of different heights on flue 11 short transverses air; Be provided with coke-oven gas nozzle 9 in the flue bottom, flue 11 tops in combustion chamber communicate with flue 6 by crossing over hole 5; Be provided with partition wall between flue 11 and the flue 6.
See Fig. 3, flue 6 bottoms are radiation chambers 3, are provided with double hose heat-exchanger rig 1 in the radiation chamber 3, double hose heat-exchanger rig 1 is formed sleeve type structure by interior pipe 12, outer tube 13, interior pipe 12 bottoms are gas inlet 15, and interior pipe 12 tops communicate with outer tube 13, and outer tube 13 tops are end enclosure structure 14; Circular channel between interior pipe 12 and the outer tube 13 is the down going channel of air after the heat exchange.
See Fig. 2, double hose heat-exchanger rig 1 bottom is air chamber 2, and the down going channel of air communicates with air chamber 2 after the heat exchange; Air chamber 2 infeeds device 4 with combustion chamber flue 11 interior multistage air and is connected.
See Fig. 4, Fig. 5, adopt described coke oven to reclaim the method for waste-gas heat, step is as follows:
1) air of 20 ℃ of room temperatures via the interior pipe of double hose heat-exchanger rig 1 go upward to outer channel closure turn back with radiation chamber 3 in hot waste gas carry out heat exchange and produce warm air, hot air temperature is 450 ℃;
2) 450 ℃ of warm airs enter air chamber 2, enter the multistage air via the flow regulator in the air chamber and infeed device 4, and air divides multistage to infeed in combustion chamber flue 11; See Fig. 5, every section air all can be regulated separately;
3) coke-oven gas sprays into the bottom of combustion chamber flue 11 by gasburner 9, carries out segmentation with warm air and mix, burn and produce 1300 ℃ high-temp waste gas in flue 11;
4) 1300 ℃ of high-temp waste gas rise to the flue top and enter flue 6 through laterally crossing over hole 4 in flue 11, are advanced into radiation chamber 3 under in flue; 1300 ℃ of high-temp waste gas and double hose heat-exchanger rig 1 carry out the fs heat exchange in radiation chamber, and air is carried out preheating, and the high-temp waste gas temperature is reduced to 850 ℃;
5) 850 ℃ high-temp waste gas is entered the waste gas bottom flue 8 of coking chamber bottom by waste gas bottom flue passage 7 after finishing the fs heat exchange, enters the high-temp waste gas that is positioned at coke side then and divides flue;
6) high-temp waste gas by coke side divides 850 ℃ of high-temp waste gas of flue derivation to mix with 140 ℃ of recycle gas that add in coal pre-heating system mixing section, and high-temp waste gas is cooled to 560 ℃; Reduce to behind the required suitable temp of coal preheating waste gas and enter in the preheater coal is carried out drying and preheating, realize the subordinate phase heat exchange, the spent air temperture after the heat exchange is reduced to 100 ℃, enters in the atmosphere then.So far, subordinate phase recovery waste-gas heat process is finished.
Claims (4)
1. the coke oven of a high efficiente callback waste-gas heat is characterized in that, comprises combustion chamber flue, flue, radiation chamber, double hose heat-exchanger rig, air chamber, waste gas bottom flue passage;
The flue bottom is a radiation chamber, and the double hose heat-exchanger rig is arranged in the radiation chamber, and the double hose heat-exchanger rig is formed sleeve type structure by interior pipe, outer tube, and interior pipe bottom is a gas inlet, and interior pipe top communicates with outer tube, and outer tube top is end enclosure structure; Circular channel between interior pipe and the outer tube is the down going channel of air after the heat exchange;
Double hose heat-exchanger rig bottom is the air chamber, and the down going channel of air communicates with the air chamber after the heat exchange; The air chamber is connected with the combustion chamber flue;
The radiation chamber bottom is communicated with the waste gas bottom flue of coking chamber bottom by waste gas bottom flue passage.
2. the coke oven of high efficiente callback waste-gas heat according to claim 1 is characterized in that, is provided with the multistage air and infeeds device in the flue of combustion chamber, and the multistage air infeeds device is provided with a plurality of different heights on the flue short transverse air introducing port; The coke-oven gas nozzle is arranged at the flue bottom, and flue top communicates with flue by crossing over the hole; Be provided with partition wall between flue and the flue.
3. the coke oven of high efficiente callback waste-gas heat according to claim 2, it is characterized in that, described combustion chamber flue, multistage air infeed device, flue, radiation chamber, double hose heat-exchanger rig, air chamber, waste gas bottom flue passage, constitute burning and heat-exchange system, this burning and heat-exchange system are divided into two groups, on the coke oven longitudinal direction, be divided into two independently systems by the combustion chamber across bulkhead.
4. the coke oven of high efficiente callback waste-gas heat according to claim 1 and 2 is characterized in that, described waste gas bottom flue divides flue to be connected with the high-temp waste gas that is positioned at coke side; The high-temp waste gas of coke side divides flue to be connected with the coal pre-heating system by connecting passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206866999U CN202016973U (en) | 2010-12-29 | 2010-12-29 | Coke oven for efficiently recycling heat of waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206866999U CN202016973U (en) | 2010-12-29 | 2010-12-29 | Coke oven for efficiently recycling heat of waste gas |
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| Publication Number | Publication Date |
|---|---|
| CN202016973U true CN202016973U (en) | 2011-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206866999U Expired - Lifetime CN202016973U (en) | 2010-12-29 | 2010-12-29 | Coke oven for efficiently recycling heat of waste gas |
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| Country | Link |
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| CN (1) | CN202016973U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349158A (en) * | 2015-12-02 | 2016-02-24 | 中冶焦耐工程技术有限公司 | Method and vertical flue bottom structure for reducing production of nitrogen oxides by coke oven |
-
2010
- 2010-12-29 CN CN2010206866999U patent/CN202016973U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349158A (en) * | 2015-12-02 | 2016-02-24 | 中冶焦耐工程技术有限公司 | Method and vertical flue bottom structure for reducing production of nitrogen oxides by coke oven |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111026 |