CN216717021U - Raw coke oven gas waste heat and dry quenching coke waste heat combined recycling system - Google Patents
Raw coke oven gas waste heat and dry quenching coke waste heat combined recycling system Download PDFInfo
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- CN216717021U CN216717021U CN202022019656.1U CN202022019656U CN216717021U CN 216717021 U CN216717021 U CN 216717021U CN 202022019656 U CN202022019656 U CN 202022019656U CN 216717021 U CN216717021 U CN 216717021U
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- steam
- waste heat
- coke
- dry quenching
- coke oven
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- 239000000571 coke Substances 0.000 title claims abstract description 59
- 239000002918 waste heat Substances 0.000 title claims abstract description 54
- 238000010791 quenching Methods 0.000 title claims abstract description 27
- 230000000171 quenching effect Effects 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 title claims abstract description 26
- 238000004064 recycling Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 230000001174 ascending effect Effects 0.000 claims abstract description 11
- 239000011261 inert gas Substances 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000012716 precipitator Substances 0.000 claims description 3
- 238000004939 coking Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 5
- 239000000428 dust Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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- Coke Industry (AREA)
Abstract
The utility model discloses a raw coke oven gas waste heat and dry quenching coke waste heat combined recycling system, wherein a water feeding pump is connected with a first steam pocket inlet, steam heated by an ascending pipe is connected with the first steam pocket inlet, a first steam pocket water outlet is heated in the ascending pipe by a first circulating water pump, the first steam pocket steam outlet is connected with a steam turbine, and the steam acts in the steam turbine. In the coking process of the coke oven, a great amount of raw gas escapes from the coking chamber, the high-temperature raw gas at 750 ℃ enters the riser evaporator of the coke oven, the temperature is reduced to about 500 ℃ after heat exchange, and the application of the riser waste heat recovery system plays a vital role in improving the operation environment at the top of the coke oven.
Description
Technical Field
The utility model belongs to the field of waste heat recovery equipment, and particularly relates to a raw coke oven gas waste heat and dry quenching coke waste heat combined recycling system.
Background
The coking chemical industry is an important component of national economy in China, and the production process of coke is as follows: the blended coal is heated and dry distilled in a coke oven under the condition of air isolation, and coke is prepared through the processes of drying, pyrolysis, melting, bonding, solidification, shrinkage and the like, and a large amount of raw coke oven gas is generated in the process. In the production energy consumption of the coke oven, the sensible heat carried by high-temperature red coke accounts for about 37 percent, the sensible heat carried by high-temperature raw coke gas accounts for about 36 percent, the sensible heat carried by coke oven flue gas accounts for about 17 percent, and the heat dissipation of the coke oven accounts for about 10 percent. Wherein, the sensible heat of the red coke can be better recovered by adopting a dry quenching technology. The dry quenching is a technology for recovering the sensible heat of the red coke in the coking process, and the dry quenching technology can recover more than 80 percent of the sensible heat of the red coke. The temperature of the coke oven crude gas is 650-800 ℃, and the part of heat belongs to intermediate temperature waste heat. The sensible heat brought by the coking raw gas is tried to be recovered from the beginning of the 80 s in China, but a mature, reliable and efficient recovery and utilization technology is not formed so far, and the waste heat resource of the coking raw gas is not effectively recovered and utilized, so that a great deal of energy is wasted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a system for jointly recycling waste heat of raw coke oven gas and waste heat of dry quenching coke.
The inert gas in the dry quenching furnace takes away the high-temperature heat of the coke, the high-temperature heat is removed by the first electric dust remover, the excessive impurities are removed, the high-temperature heat enters a waste heat boiler, the feed water in the waste heat boiler is heated, and the feed water returns to the dry quenching furnace through a second electric dust remover for recycling.
The water feeding pump is connected with the waste heat boiler, and the water feeding pump firstly enters the economizer in the waste heat boiler for heating and then enters the second steam drum through the pipeline.
And water from the second steam drum passes through a second circulating water pump, enters a fin evaporator in the waste heat boiler to be heated, and then returns to the second steam drum through a pipeline.
The steam in the second steam drum returns to the superheater in the waste heat boiler again to become superheated steam, and the superheated steam is mixed with the steam from the first steam drum to work in the steam turbine.
The utility model has the beneficial effects that:
1. in the coking process of the coke oven, a great amount of raw gas escapes from a coking chamber, high-temperature raw gas at 750 ℃ enters an ascending tube evaporator of the coke oven, the temperature is reduced to about 500 ℃ after heat exchange, the application of an ascending tube waste heat recovery system plays a crucial role in improving the operation environment of the top of the coke oven, according to measurement, the temperature of the outer wall of the old ascending tube barrel is over 200 ℃, the temperature of the outer wall of a new barrel is gradually reduced from about 100 ℃ at the bottom of the lower section of the ascending tube upwards to 40-50 ℃ at the top of the upper section, the operation environment temperature of the top of the coke oven can be reduced by about 20 ℃, and the operation environment of the top of the coke oven is improved.
2. The coke dry quenching can recover 80% of heat of red coke, the coke enters a dry quenching furnace, the temperature of the red coke is 950-1050 ℃, the red coke exchanges heat with countercurrent circulating inert gas, the temperature of the coke is reduced to be below 200 ℃, the temperature of the circulating inert gas is increased to be above 900-960 ℃ from 130 ℃, the heat of the coke is recycled, the coke is heated in a waste heat boiler to supply water, and the superheated steam is converted into superheated steam to a steam turbine to do work.
3. The hot discharged by the red coke and the hot discharged by the raw gas account for 73 percent of the coking heat, the high-temperature waste heat of the red coke and the medium-temperature waste heat of the raw gas are jointly recovered, so that the energy conservation and emission reduction are realized, the energy utilization rate is further improved, the contribution to environmental protection is made, considerable economic benefits are created, and the national energy-saving policy is met.
Drawings
FIG. 1 is a combined recycling system for crude gas waste heat and dry quenching coke waste heat.
In the figure: 1-a water supply pump; 2-a first steam drum; 3-a first circulating water pump; 4-a riser; 5-a steam turbine; 6-dry quenching; 7-a first electric precipitator; 8, a waste heat boiler; 9-a second circulating water pump; 10-a second drum; 11-a superheater; 12-a finned evaporator; 13-a coal economizer; 14-a second electric dust collector.
Detailed Description
The utility model provides a raw coke oven gas waste heat and dry quenching coke waste heat combined recycling system, and the working principle of the system is further explained by combining the attached drawings and the specific implementation mode.
FIG. 1 shows a schematic diagram of a raw coke oven gas waste heat and dry quenching coke waste heat combined recycling system, a water feeding pump 1 of the system is connected with an inlet of a first steam pocket 2, steam heated by an ascending pipe 4 is connected with an inlet of the first steam pocket 2, a water outlet of the first steam pocket 2 is heated in the ascending pipe 4 by a first circulating water pump 3, a steam outlet of the first steam pocket 2 is connected with a steam turbine 5, and the steam works in the steam turbine 5.
The inert gas in the dry quenching furnace 6 takes away the high-temperature heat of the coke, the inert gas passes through the first electric dust remover 7, after redundant impurities are removed, the inert gas enters the waste heat boiler 8, the feed water in the waste heat boiler 8 is heated, and the inert gas returns to the dry quenching furnace 6 through the second electric dust remover 14 to be recycled.
The feed water pump 1 is connected with the waste heat boiler 8, and feed water is heated by an economizer 13 in the waste heat boiler 8 and then is conveyed into the second steam pocket 10 through a pipeline.
The water from the second steam drum 10 passes through the second circulating water pump 9, enters the fin evaporator 12 in the waste heat boiler 8 to be heated, and then returns to the second steam drum 10 through the pipeline.
The steam in the second steam drum 10 returns to the superheater 11 in the waste heat boiler 8 again to become superheated steam, and the superheated steam is mixed with the steam coming out of the first steam drum 2 and enters the steam turbine 5 to do work.
The working process is as follows:
the raw gas is subjected to heat exchange from a coke oven carbonization chamber through a raw gas waste heat recovery device of an ascending pipe 4, the temperature of flue gas is reduced to more than 450 ℃, deaerated water is sent into a first steam drum 2 through a water feeding pump 1, steam-water separation is carried out in the steam drum, and steam is output from the steam drum to a steam turbine 5 to do work.
The temperature of red coke pushed out of a carbonization chamber and entering a dry quenching furnace 6 is 950-1050 ℃, the red coke loaded into the dry quenching furnace 6 is pre-stored in a pre-storage section for a period of time, the red hot coke flows downwards to enter a cooling section along with the progress of coke discharging, 130 ℃ low-temperature circulating gas entering from the bottom of the dry quenching furnace 6 flows upwards in the cooling section, the red hot coke and the cooling gas carry out countercurrent heat exchange, the coke is cooled to below 200 ℃ and is discharged from the bottom of the dry quenching furnace 6, the circulating gas passes through a first electric dust remover 7 to heat feed water in a waste heat boiler 8, the feed water from a feed water pump 1 is heated by an economizer 13 in the waste heat boiler 8 and enters a second steam drum 10, the water from the second steam drum 10 passes through a second circulating water pump 9 and enters a fin evaporator 12 in the waste heat boiler 8 to be heated, then returns to the second steam drum 10 through a pipeline, and the steam in the second steam drum 10 returns to a superheater 11 in the waste heat boiler 8 again, becomes superheated steam, mixes with the steam coming out of the first steam drum 2, and performs work in the steam turbine 5.
Claims (3)
1. A raw gas waste heat and dry quenching waste heat combined recycling system is characterized in that a water feed pump (1) is connected with an inlet of a first steam pocket (2), steam heated by an ascending pipe (4) is connected with an inlet of the first steam pocket (2), a water outlet of the first steam pocket (2) is heated in the ascending pipe (4) through a first circulating water pump (3), a steam turbine (5) is connected with a steam outlet of the first steam pocket (2), the steam works in the steam turbine (5), inert gas in a dry quenching furnace (6) takes away high-temperature heat of coke, the inert gas in the first electric precipitator (7) removes redundant impurities and then enters a waste heat boiler (8) to heat feed water in the waste heat boiler (8), the feed water returns to the dry quenching furnace (6) through a second electric precipitator (14) to be recycled, the water feed pump (1) is connected with the waste heat boiler (8), and the feed water firstly enters a coal economizer (13) in the waste heat boiler (8) to be heated, through a conduit to a second drum (10).
2. The system for jointly recycling the waste heat of the raw coke oven gas and the waste heat of the dry quenching as claimed in claim 1, wherein the water from the second steam drum (10) passes through the second circulating water pump (9), enters the fin evaporator (12) of the waste heat boiler (8) to be heated, and then returns to the second steam drum (10) through a pipeline.
3. The system for jointly recycling the waste heat of the raw coke oven gas and the waste heat of the dry quenching coke as claimed in claim 1, wherein the steam in the second steam drum (10) returns to the superheater (11) in the waste heat boiler (8) again to become superheated steam, and the superheated steam is mixed with the steam coming out of the first steam drum (2) and is sent to the steam turbine (5) to do work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022019656.1U CN216717021U (en) | 2020-09-16 | 2020-09-16 | Raw coke oven gas waste heat and dry quenching coke waste heat combined recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022019656.1U CN216717021U (en) | 2020-09-16 | 2020-09-16 | Raw coke oven gas waste heat and dry quenching coke waste heat combined recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216717021U true CN216717021U (en) | 2022-06-10 |
Family
ID=81872437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022019656.1U Expired - Fee Related CN216717021U (en) | 2020-09-16 | 2020-09-16 | Raw coke oven gas waste heat and dry quenching coke waste heat combined recycling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216717021U (en) |
-
2020
- 2020-09-16 CN CN202022019656.1U patent/CN216717021U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220610 |
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| CF01 | Termination of patent right due to non-payment of annual fee |