CN108131656A - The ultra-clean cold-heat combined system of discharge in coke-oven plant - Google Patents
The ultra-clean cold-heat combined system of discharge in coke-oven plant Download PDFInfo
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- CN108131656A CN108131656A CN201710558062.8A CN201710558062A CN108131656A CN 108131656 A CN108131656 A CN 108131656A CN 201710558062 A CN201710558062 A CN 201710558062A CN 108131656 A CN108131656 A CN 108131656A
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 122
- 239000003546 flue gas Substances 0.000 claims abstract description 87
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 86
- 238000005057 refrigeration Methods 0.000 claims abstract description 61
- 239000007789 gas Substances 0.000 claims abstract description 56
- 239000002918 waste heat Substances 0.000 claims abstract description 37
- 230000008676 import Effects 0.000 claims description 163
- 239000000779 smoke Substances 0.000 claims description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 239000000571 coke Substances 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000001179 sorption measurement Methods 0.000 claims description 25
- 238000001816 cooling Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000002775 capsule Substances 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 claims description 2
- 238000011069 regeneration method Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 7
- 238000004939 coking Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000007872 degassing Methods 0.000 abstract description 2
- 238000006477 desulfuration reaction Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1892—Systems therefor not provided for in F22B1/1807 - F22B1/1861
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The present invention provides a kind of ultra-clean cold-heat combined systems of discharge in coke-oven plant, including denitrification apparatus, waste heat boiler, absorption tower, regenerator, denitrification apparatus is used to carry out denitration process to flue gas, waste heat boiler is used for the waste heat of recovered flue gas, the flue gas of waste heat boiler provides heat source by heat exchanger for absorption refrigeration unit, and absorption tower, regenerator are used to carry out flue gas deep desulfuration, dedusting and degassing colloidal sol processing.The ultra-clean cold-heat combined system of discharge in the coke-oven plant, by the way that the devices such as denitrification apparatus, waste heat boiler, absorption tower, regenerator, depth recycling and the waste heat for efficiently utilizing coking kiln gas is configured, flue gas is handled with time stage, it realizes the ultra-clean discharge of flue gas, ensures annual energy conservation and environmental protection income.
Description
Technical field
The present invention relates to a kind of ultra-clean cold-heat combined systems of discharge in coke-oven plant.
Background technology
The energy is the important substance basis of social development, and the energy problem that China faces is mainly reflected in efficiency of energy utilization
Low, deficiency in economic performance, energy-consuming increase rapidly, eco-environmental pressure is apparent etc..
Coke oven is that efficient Thermal Equipment, net efficiency are up to 87%~89% in energy conversion device.This is because refining
Burnt process is not only a more perfect conversion process of energy, can generate good secondary energy sources, and coke oven body equipment passes through
Continuously improving for more than 100 years is crossed, it is more perfect in gas-fired, flue gas heat utilization, thermal insulation etc..But this can not say
It is bright it there is no energy-efficient leeway.
It is resource-effective, environmental-friendly green coke-oven plant that high efficiente callback, which utilizes the residual heat resources generated in process of coking,
Where energy-efficient Main way and potentiality and put forward one of efficient main path.At present, existing energy conservation measure is main
Have：1st, coke oven heat outputting is fully recycled；2nd, Dry Quenching Technology is deeply promoted, fully recycles red burnt waste heat；3rd, it researches and develops
The recycling of raw coke oven gas waste heat；4th, the recycling of flue gases of cock oven waste heat.
More than measure from a certain respect, studies the waste heat recovery of coke oven, does not further investigate coke-oven plant's energy
Source is distributed rationally, therefore can not achieve energy-efficient maximization and generalization.In addition, existing energy conservation measure, in terms of environmental protection
Research be short of, and at present environment-friendly products often increase energy consumption, do not have energy conservation characteristic.
Invention content
The technical problems to be solved by the invention are the sections in order to overcome the waste heat recovery measure of coke oven of the prior art
Can efficiency it is low and the defects of do not have both environment protecting, and provide a kind of coke-oven plant the ultra-clean cold-heat combined system of discharge.
The present invention solves above-mentioned technical problem by the following technical programs：
The present invention provides a kind of cold-heat combined system of the ultra-clean discharge in coke-oven plant, including：
Denitrification apparatus, the denitrification apparatus have denitration gas inlet, denitration exhanst gas outlet, and flue gas is from the denitration flue gas
Import enters in the denitrification apparatus and is discharged from the denitration exhanst gas outlet；
Waste heat boiler, the waste heat boiler have boiler smoke import, boiler flue gas outlet, the import of boiler low-temperature receiver, boiler
Low-temperature receiver exports, and is connected between the boiler smoke import, boiler flue gas outlet by boiler smoke pipeline, the boiler low-temperature receiver
Import, boiler low-temperature receiver are connected between outlet by boiler low-temperature receiver pipeline, the flue gas in the boiler smoke pipeline and the pot
Working medium in furnace cooling source capsule road carries out heat exchange, and boiler smoke import is connected with denitration exhanst gas outlet；
Absorption tower, the absorption tower have adsorption tower smoke import, adsorption tower smoke outlet, absorption tower solution inlet port, inhale
Tower taphole is received, the adsorption tower smoke import is connected with the boiler flue gas outlet, the adsorption tower smoke import position
In the lower part on the absorption tower and the flue gas is discharged into the inside on the absorption tower, and the adsorption tower smoke outlet is located at institute
State the top on absorption tower and discharge the flue gas to outside, the absorption tower solution inlet port be located at the top on the absorption tower and to
Hygroscopic solution is sprayed in the absorption tower, the absorption tower taphole is located at the lower part on the absorption tower and discharges the moisture absorption
Solution；
Regenerator, the regenerator has regenerator solution inlet port, regenerator taphole, indirect steam outlet, described
Regenerator solution inlet port is connected with the absorption tower taphole, the regenerator taphole and the absorption tower solution into
Mouth is connected, and the indirect steam that the hygroscopic solution heating evaporation goes out is discharged in the indirect steam outlet.
Preferably, the ultra-clean cold-heat combined system of discharge in coke-oven plant further includes at least one heat exchanger, the boiler smoke
Gas exports and/or indirect steam outlet is connected at least one heat exchanger and heat exchange.
Preferably, the absorption tower also have absorption tower low-temperature receiver import, absorption tower low-temperature receiver export, the absorption tower low-temperature receiver into
Mouth, absorption tower low-temperature receiver are connected between outlet by absorption tower low-temperature receiver pipeline, working medium and institute in the absorption tower low-temperature receiver pipeline
The working medium for stating the inside on absorption tower carries out heat exchange.
Preferably, the absorption tower low-temperature receiver outlet is connected at least one heat exchanger and heat exchange.
Preferably, the regenerator also have regenerator heat source import, regenerator thermal source outlet, the regenerator heat source into
Mouth is connected between the regenerator thermal source outlet by regenerator heat source pipeline, the working medium in the regenerator heat source pipeline
Heat exchange is carried out with the working medium of the inside of the regenerator, the regenerator heat source import is connected with boiler low-temperature receiver outlet
It is logical.
Preferably, the regenerator thermal source outlet is connected at least one heat exchanger and heat exchange.
Preferably, the ultra-clean cold-heat combined system of discharge in coke-oven plant further includes absorption refrigeration unit, it is described absorption
Refrigeration unit is connected at least one heat exchanger and heat exchange.
Preferably, the ultra-clean cold-heat combined system of discharge in coke-oven plant further includes：
First Heat Exchanger, the First Heat Exchanger be located at the boiler flue gas outlet and the adsorption tower smoke import it
Between, the First Heat Exchanger has the first gas inlet, the first exhanst gas outlet, the first low-temperature receiver import, the outlet of the first low-temperature receiver, described
It is connected between first gas inlet, the first exhanst gas outlet by the first flue, the first low-temperature receiver import, the first low-temperature receiver
It is connected between outlet by the first low-temperature receiver pipeline, in the flue gas in first flue and the first low-temperature receiver pipeline
Working medium carries out heat exchange, and the boiler flue gas outlet is connected with first gas inlet, first exhanst gas outlet and institute
Adsorption tower smoke import is stated to be connected；
Second heat exchanger, second heat exchanger have the second low-temperature receiver import, the outlet of the second low-temperature receiver, Secondary Heat Source import,
Secondary Heat Source exports, and the second low-temperature receiver import, the second low-temperature receiver are connected between outlet by the second low-temperature receiver pipeline, and described second
Heat source import, Secondary Heat Source are connected between outlet by Secondary Heat Source pipeline, working medium and institute in the second low-temperature receiver pipeline
It states the working medium in Secondary Heat Source pipeline and carries out heat exchange, the Secondary Heat Source import is connected with indirect steam outlet, institute
It states Secondary Heat Source outlet with exterior line to be connected, between the second low-temperature receiver import, the outlet of the second low-temperature receiver, the outlet of the first low-temperature receiver
It is interconnected；
Third heat exchanger, the third heat exchanger have the import of third low-temperature receiver, the outlet of third low-temperature receiver, third heat source import,
Third thermal source outlet, the third low-temperature receiver import, third low-temperature receiver are connected between outlet by third low-temperature receiver pipeline, the third
It is connected between heat source import, third thermal source outlet by third heat source pipeline, working medium and institute in the third low-temperature receiver pipeline
It states the working medium in third heat source pipeline and carries out heat exchange, the third heat source import is connected with indirect steam outlet, institute
The outlet of third thermal source outlet and the Secondary Heat Source is stated to be connected, the third low-temperature receiver import, the outlet of third low-temperature receiver with it is described
Exterior line is connected.
Preferably, the absorption tower also have absorption tower low-temperature receiver import, absorption tower low-temperature receiver export, the absorption tower low-temperature receiver into
Mouthful, absorption tower low-temperature receiver outlet between be connected by absorption tower low-temperature receiver pipeline, the working medium of the absorption tower low-temperature receiver pipeline with it is described
The working medium of the inside on absorption tower carries out heat exchange；
The regenerator also has regenerator heat source import, regenerator thermal source outlet, the regenerator heat source import and institute
State and be connected by regenerator heat source pipeline between regenerator thermal source outlet, the working medium in the regenerator heat source pipeline with it is described
The working medium of the inside of regenerator carries out heat exchange, and the regenerator heat source import is connected with boiler low-temperature receiver outlet；
The ultra-clean cold-heat combined system of discharge in coke-oven plant further includes the 4th heat exchanger, and the 4th heat exchanger has the 4th
Low-temperature receiver import, the outlet of the 4th low-temperature receiver, the 4th heat source import, the 4th thermal source outlet, the 4th low-temperature receiver import, the outlet of the 4th low-temperature receiver
Between be connected by the 4th low-temperature receiver pipeline, pass through the 4th heat source pipeline between the 4th heat source import, the 4th thermal source outlet
It is connected, the working medium in the 4th low-temperature receiver pipeline and the working medium progress heat exchange in the 4th heat source pipeline, the described 4th
Heat source import is connected with the regenerator thermal source outlet, and the 4th thermal source outlet is connected with the exterior line, described
4th low-temperature receiver import is connected with absorption tower low-temperature receiver outlet, and the 4th low-temperature receiver outlet is connected with the third low-temperature receiver import
It is logical.
Preferably, the ultra-clean cold-heat combined system of discharge in coke-oven plant further includes absorption refrigeration unit, it is described absorption
Refrigeration unit has refrigeration unit heat source import, refrigeration unit thermal source outlet, refrigeration unit chilled water import, refrigeration unit freezing
Water out is connected between the refrigeration unit heat source import, refrigeration unit thermal source outlet by refrigeration unit heat source pipeline, institute
It states and is connected between refrigeration unit chilled water import, refrigeration unit chilled water outlet by chilled water pipeline, the chilled water pipe
Chilled water in road and the working medium progress heat exchange in the refrigeration unit heat source pipeline, the refrigeration unit chilled water import,
Refrigeration unit chilled water outlet is connected with the external pipe, and the refrigeration unit heat source import is exported with first low-temperature receiver
It is connected, the refrigeration unit thermal source outlet is connected with the first low-temperature receiver import.
Preferably, the ultra-clean cold-heat combined system of discharge in coke-oven plant further includes denitrification apparatus, the denitrification apparatus has
Denitration gas inlet, denitration exhanst gas outlet, the denitration exhanst gas outlet are connected with the boiler smoke import, the flue gas from
The denitration gas inlet enters in the denitrification apparatus and is discharged from the denitration exhanst gas outlet.
Preferably, the ultra-clean cold-heat combined system of discharge in coke-oven plant further includes heater, the heater includes coke oven
Gas inlet, coke oven flue gas outlet, heating source import, heating source outlet, between the coke oven flue gas import, coke oven flue gas outlet
It is connected by coke oven flue gas pipeline, the heating source import, heating source are connected between outlet by heating source pipeline, described
Flue gas in coke oven flue gas pipeline and the working medium in the heating source pipeline carry out heat exchange, the coke oven flue gas outlet with it is described
Denitration gas inlet is connected.
On the basis of common knowledge of the art, above-mentioned each optimum condition can be combined arbitrarily to get each preferable reality of the present invention
Example.
The positive effect of the present invention is：
The ultra-clean cold-heat combined system of discharge in the coke-oven plant, it is deep by the way that the devices such as waste heat boiler, absorption tower, regenerator are configured
Degree recycles and efficiently utilizes the waste heat of coking kiln gas, also has both the environmental benefit of the ultra-clean discharge of flue gas, ensure that annual section
It can environmentally friendly income.
Description of the drawings
Fig. 1 is the schematic diagram of the ultra-clean cold-heat combined system of discharge in coke-oven plant of the present invention.
Reference sign
Waste heat boiler 1
Boiler smoke import 11
Boiler flue gas outlet 12
Boiler low-temperature receiver import 13
Boiler low-temperature receiver outlet 14
Absorption tower 2
Adsorption tower smoke import 21
Adsorption tower smoke outlet 22
Absorption tower solution inlet port 23
Absorption tower taphole 24
Absorption tower low-temperature receiver import 25
Absorption tower low-temperature receiver outlet 26
Regenerator 3
Regenerator solution inlet port 31
Regenerator taphole 32
Indirect steam outlet 33
Regenerator heat source import 34
Regenerator thermal source outlet 35
Absorption refrigeration unit 4
Refrigeration unit heat source import 41
Refrigeration unit thermal source outlet 42
Refrigeration unit chilled water import 43
44 First Heat Exchanger 5 of refrigeration unit chilled water outlet
First gas inlet 51
First exhanst gas outlet 52
First low-temperature receiver import 53
First low-temperature receiver outlet 54
Second heat exchanger 6
Second low-temperature receiver import 61
Second low-temperature receiver outlet 62
Secondary Heat Source import 63
Secondary Heat Source outlet 64
Third heat exchanger 7
Third low-temperature receiver import 71
Third low-temperature receiver outlet 72
Third heat source import 73
Third thermal source outlet 74
4th heat exchanger 8
4th low-temperature receiver import 81
4th low-temperature receiver outlet 82
4th heat source import 83
4th thermal source outlet 84
Denitrification apparatus 9
Denitration gas inlet 91
Denitration exhanst gas outlet 92
Heater 10
Coke oven flue gas import 101
Coke oven flue gas outlet 102
Heating source import 103
Heating source outlet 104
Specific embodiment
It is further illustrated the present invention below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
It is as shown in Figure 1 the ultra-clean cold-heat combined system of discharge in coke-oven plant provided by the present invention, including waste heat boiler 1, inhales
Tower 2, regenerator 3 are received, waste heat boiler 1 has boiler smoke import 11, boiler flue gas outlet 12, boiler low-temperature receiver import 13, boiler
Low-temperature receiver outlet 14, be connected between boiler smoke import 11, boiler flue gas outlet 12 by boiler smoke pipeline, boiler low-temperature receiver into
It is connected between mouth 13, boiler low-temperature receiver outlet 14 by boiler low-temperature receiver pipeline, the flue gas in boiler smoke pipeline and boiler low-temperature receiver
Working medium in pipeline carries out heat exchange；Absorption tower 2 is molten with adsorption tower smoke import 21, adsorption tower smoke outlet 22, absorption tower
Liquid import 23, absorption tower taphole 24, adsorption tower smoke import 21 are connected with boiler flue gas outlet 12, adsorption tower smoke into
Mouth 21 is located at the lower part on absorption tower 2 and discharges the inside that flue gas enters absorption tower 2, and adsorption tower smoke outlet 22 is located at absorption tower 2
Top and discharge flue gas to outside, absorption tower solution inlet port 23 is located at the top on absorption tower 2 and sprays moisture absorption into absorption tower 2
Solution, absorption tower taphole 24 are located at the lower part on absorption tower 2 and discharge hygroscopic solution；Regenerator 3 have regenerator solution into
Mouth 31, regenerator taphole 32, indirect steam outlet 33, regenerator solution inlet port 31 is connected with absorption tower taphole 24
Logical, regenerator taphole 32 is connected with absorption tower solution inlet port 23, and indirect steam exports 33 by hygroscopic solution heating evaporation
The indirect steam discharge gone out.
After waste heat boiler 1 is recycled the waste heat of coking kiln gas, flue gas enters in absorption tower 2, and the waste heat of flue gas passes
Pass the working medium in boiler low-temperature receiver pipeline, such as heat supply in winter water, annual boiler feed water, domestic water and industrial water etc..Cigarette
Gas enters from adsorption tower smoke import 21 in absorption tower 2, runs from bottom to top, with entering and from upper from absorption tower solution inlet port 23
The hygroscopic solution countercurrent heat-transfer mass transfer just to fall, hygroscopic solution play the role of depth dedusting, degassing colloidal sol.Flue gas is through absorption tower
22 discharge system of exhanst gas outlet, the waste heat for the flue gas discharged at this time have been recycled and by hygroscopic solution deep purifying, have been realized
While ultra-clean discharge, waste heat recovery is also achieved.Hygroscopic solution absorbs the vapor in flue gas after flue gas, dense molten
Liquid is diluted as weak solution, and is flowed into regenerator 3 from absorption tower taphole 24, regenerator solution inlet port 31.Weak solution exists
Heated in regenerator 3 and evaporate indirect steam, weak solution becomes concentrated solution again, and from regenerator taphole 32, absorb
Tower solution inlet port 23 enters in absorption tower 2, realizes the cycle of hygroscopic solution.
Finned tube-heat pipe waste heat boiler that waste heat boiler 1 is combined using finned tube and heat pipe, i.e., dew-point temperature with
On exchanged heat with finned tube (primary heat exchange), at the position that dew point corrosion temperature easily occurs with heat pipe (secondary heat exchange), reasonably
Heat exchange design and wall temperature design, can improve the coefficient of heat transfer, while solve the problems, such as low-temperature dew point corrosion.
Before flue gas enters waste heat boiler 1, it is also necessary to carry out denitration process, therefore, also be set before waste heat boiler 1
Denitrification apparatus 9 is put, flue gas is entered back into after first passing through 9 denitration of denitrification apparatus in waste heat boiler 1.Specifically, denitrification apparatus 9
With denitration gas inlet 91, denitration exhanst gas outlet 92, denitration exhanst gas outlet 92 is connected with boiler smoke import 11, flue gas from
Denitration gas inlet 91 enters in denitrification apparatus 9 and is discharged from denitration exhanst gas outlet 92.
Flue gas need to reach higher temperature when carrying out denitration process, in order to ensure denitration effect, enter denitration in flue gas
Before device 9, need first to be heated in heater 10.Specifically, heater 10 includes coke oven flue gas import 101, coke oven cigarette
Gas outlet 102, heating source import 103, heating source outlet 104, pass through between coke oven flue gas import 101, coke oven flue gas outlet 102
Coke oven flue gas pipeline is connected, and is connected between heating source import 103, heating source outlet 104 by heating source pipeline, coke oven cigarette
Flue gas in feed channel carries out heat exchange, coke oven flue gas outlet 102 and denitration gas inlet 91 with the working medium in heating source pipeline
It is connected.For energy saving and comprehensive utilization, using coking furnace raw coke oven gas waste-heat flue gas, i.e. coking furnace raw coke oven gas is from heating
Source import 103 enters in heating source pipeline, and 104 discharge of heating source outlet, raw coke oven gas and coke oven flue gas in heating source pipeline
Flue gas in pipeline carries out heat exchange, and the temperature of flue gas is promoted.Heater 10 can be plate-fin heat exchanger, heat exchange of heat pipe or
Plate heat exchanger etc..
Above system can set multiple heat exchangers according to actual demand in each position, such as in boiler flue gas outlet 12 and
Heat exchanger between adsorption tower smoke import 21 can be set, one or more heat exchangers such as can be set at indirect steam outlet 33.
Heat exchanger can be plate-fin heat exchanger, heat exchange of heat pipe, plate heat exchanger etc..
Sensible heat is only released into the flue gas in absorption tower 2, actually also has the latent heat of vaporization that can recycle in flue gas, is
Further improve waste heat recovery rate, can in absorption tower 2 setting heat exchange facilities, so that the latent heat of flue gas is also recycled.Specifically
For, absorption tower 2 also has absorption tower low-temperature receiver import 25, absorption tower low-temperature receiver outlet 26, and absorption tower low-temperature receiver import 25, absorption tower are cold
It is connected between source outlet 26 by absorption tower low-temperature receiver pipeline, the working medium in the low-temperature receiver pipeline of absorption tower and the inside on absorption tower 2
Working medium carries out heat exchange.Except the setting heat exchange facilities in absorption tower 2, also absorption tower low-temperature receiver can be exported 26 and be changed with one or more
Hot device is connected and heat exchange, realizes the comprehensive recycling of waste heat.
Meanwhile hygroscopic solution enters in regenerator 3, and heat exchange facilities are also provided in regenerator 3, makes to exchange heat through waste heat boiler 1
The steam generated afterwards enters in regenerator 3 and carries out heat exchange with the solution in regenerator 3.Specifically, regenerator 3 also has
Regenerator heat source import 34, regenerator thermal source outlet 35, pass through between regenerator heat source import 34 and regenerator thermal source outlet 35
Regenerator heat source pipeline is connected, and the working medium of the working medium in regenerator heat source pipeline and the inside of regenerator 3 carries out heat exchange, then
Raw device heat source import 34 is connected with boiler low-temperature receiver outlet 14.It, can also be by regenerator heat except the setting heat exchange facilities in regenerator 3
Source outlet 35 is connected with one or more heat exchangers and heat exchange, realizes the comprehensive recycling of waste heat.
The steam of the generation of waste heat boiler 1 has compared with high-grade, can be directly used as the regeneration heat source of regenerator 3, therefore, will
Regenerator heat source import 34 is connected with boiler low-temperature receiver outlet 14, can further improve energy utilization rate.
The low-temperature receiver of heat exchanger is heated rear available for heat supply in winter water, annual boiler feed water, domestic water and industrial water
Deng.In addition to this, heat exchanger can also be connected with absorption refrigeration unit 4, be mainly used for meeting the needs of plant area's cooling in summer.
A kind of concrete scheme of the combination of above-mentioned heat exchanger is as follows：
The ultra-clean cold-heat combined system of discharge in coke-oven plant includes First Heat Exchanger 5, the second heat exchanger 6, third heat exchanger 7, the
For one heat exchanger 5 between boiler flue gas outlet 12 and adsorption tower smoke import 21, First Heat Exchanger 5 has the first gas inlet
51st, the first exhanst gas outlet 52, the first low-temperature receiver import 53, the first low-temperature receiver outlet 54, the first gas inlet 51, the first exhanst gas outlet 52
Between be connected by the first flue, the first low-temperature receiver import 53, the first low-temperature receiver outlet 54 between pass through the first low-temperature receiver pipeline
Be connected, working medium in the flue gas and the first low-temperature receiver pipeline in the first flue carries out heat exchange, boiler flue gas outlet 12 with
First gas inlet 51 is connected, and the first exhanst gas outlet 52 is connected with adsorption tower smoke import 21；
Second heat exchanger 6 has the second low-temperature receiver import 61, the second low-temperature receiver outlet 62, Secondary Heat Source import 63, Secondary Heat Source
Outlet 64 is connected between second low-temperature receiver import 61, the second low-temperature receiver outlet 62 by the second low-temperature receiver pipeline, Secondary Heat Source import
63rd, it is connected between Secondary Heat Source outlet 64 by Secondary Heat Source pipeline, the working medium in the second low-temperature receiver pipeline and Secondary Heat Source pipe
Working medium in road carries out heat exchange, and Secondary Heat Source import 63 is connected with indirect steam outlet 33, Secondary Heat Source outlet 64 with outside
Portion's pipeline is connected, and the second low-temperature receiver import 61, the second low-temperature receiver are interconnected between exporting the 62, first low-temperature receiver outlet 54；
Third heat exchanger 7 has third low-temperature receiver import 71, third low-temperature receiver outlet 72, third heat source import 73, third heat source
Outlet 74 is connected between third low-temperature receiver import 71, third low-temperature receiver outlet 72 by third low-temperature receiver pipeline, third heat source import
73rd, it is connected between third thermal source outlet 74 by third heat source pipeline, the working medium in third low-temperature receiver pipeline and third heat source tube
Working medium in road carries out heat exchange, and third heat source import 73 exports 33 with indirect steam and is connected, third thermal source outlet 74 and the
Two thermal source outlets 64 are connected, and third low-temperature receiver import 71, third low-temperature receiver outlet 72 are connected with exterior line.
By First Heat Exchanger 5, the second heat exchanger 6, third heat exchanger 7, boiler flue gas outlet 12, indirect steam are exported
The waste heat of 33 position has carried out comprehensive recycling, and is interconnected between heat exchanger, and each heat exchanger is made to be equipped with bypass, increases
The safety of system.
4th heat exchanger 8 is used to recycling absorption tower 2, the heat in regenerator 3, the 4th heat exchanger 8 have the 4th low-temperature receiver into
The 81, the 4th low-temperature receiver of mouth exports the 82, the 4th heat source import 83, the 4th thermal source outlet 84, the 4th low-temperature receiver import 81, the outlet of the 4th low-temperature receiver
It is connected between 82 by the 4th low-temperature receiver pipeline, passes through the 4th heat source tube between the 4th heat source import 83, the 4th thermal source outlet 84
Road is connected, and the working medium in the 4th low-temperature receiver pipeline carries out heat exchange, the 4th heat source import 83 with the working medium in the 4th heat source pipeline
It is connected with regenerator thermal source outlet 35, the 4th thermal source outlet 84 is connected with exterior line, and the 4th low-temperature receiver import 81 is with absorbing
Tower low-temperature receiver outlet 26 is connected, and the 4th low-temperature receiver outlet 82 is connected with third low-temperature receiver import 71.
By First Heat Exchanger 5, the second heat exchanger 6, third heat exchanger 7, the 4th heat exchanger 8, high efficiente callback utilizes coke oven
Fume afterheat, makes full use of other waste heats in factory, and no primary energy input is realized flue gas minimum discharge environmental benefit, be ensure that
Annual energy conservation and environmental protection income.
Absorption refrigeration unit 4 is connected with wherein one or more above-mentioned heat exchangers, can meet plant area's cooling in summer
Demand.A kind of concrete scheme of absorption refrigeration unit 4 is as follows：Absorption refrigeration unit 4 has refrigeration unit heat source import
41st, refrigeration unit thermal source outlet 42, refrigeration unit chilled water import 43, refrigeration unit chilled water outlet 44, refrigeration unit heat source
It is connected between import 41, refrigeration unit thermal source outlet 42 by refrigeration unit heat source pipeline, refrigeration unit chilled water import 43,
It is connected between refrigeration unit chilled water outlet 44 by chilled water pipeline, the chilled water in chilled water pipeline and refrigeration unit heat
Working medium in source capsule road carries out heat exchange, refrigeration unit chilled water import 43, refrigeration unit chilled water outlet 44 and external pipe
It is connected, refrigeration unit heat source import 41 is connected with the first low-temperature receiver outlet 54,42 and first low-temperature receiver of refrigeration unit thermal source outlet
Import 53 is connected.Absorption refrigeration unit 4 is not limited in practice to be connected with First Heat Exchanger 5, the second heat exchanger 6,
It can be connected with other heat exchangers.
The present invention is not limited to the above-described embodiments, no matter making any variation in its shape or structure, all falls within this hair
Within bright protection domain.Protection scope of the present invention is defined by the appended claims, and those skilled in the art exists
Under the premise of without departing substantially from the principle and substance of the present invention, many changes and modifications may be made, but these
Change and modification each fall within protection scope of the present invention.
Claims (11)
1. a kind of ultra-clean cold-heat combined system of discharge in coke-oven plant, which is characterized in that including：
Denitrification apparatus (9), the denitrification apparatus (9) have denitration gas inlet (91), denitration exhanst gas outlet (92), and flue gas is from institute
Denitration gas inlet (91) is stated to enter in the denitrification apparatus (9) and discharge from the denitration exhanst gas outlet (92)；
Waste heat boiler (1), the waste heat boiler (1) have boiler smoke import (11), boiler flue gas outlet (12), boiler low-temperature receiver
Import (13), boiler low-temperature receiver outlet (14), the boiler smoke import (11), boiler flue gas outlet pass through boiler smoke between (12)
Feed channel is connected, and is connected between the boiler low-temperature receiver import (13), boiler low-temperature receiver outlet (14) by boiler low-temperature receiver pipeline,
Flue gas in the boiler smoke pipeline carries out heat exchange, the boiler smoke import with the working medium in the boiler low-temperature receiver pipeline
(11) it is connected with the denitration exhanst gas outlet (92)；
Absorption tower (2), the absorption tower (2) are molten with adsorption tower smoke import (21), adsorption tower smoke outlet (22), absorption tower
Liquid import (23), absorption tower taphole (24), the adsorption tower smoke import (21) and the boiler flue gas outlet (12) phase
Connection, the adsorption tower smoke import (21) is positioned at the lower part of the absorption tower (2) and discharges the flue gas into the absorption
The inside of tower (2), adsorption tower smoke outlet (22) is positioned at the top of the absorption tower (2) and discharges the flue gas to outer
Portion, it is molten that the absorption tower solution inlet port (23) sprays moisture absorption positioned at the top of the absorption tower (2) and into the absorption tower (2)
Liquid, the absorption tower taphole (24) is positioned at the lower part of the absorption tower (2) and discharges the hygroscopic solution；
Regenerator (3), the regenerator (3) have regenerator solution inlet port (31), regenerator taphole (32), indirect steam
It exports (33), the regenerator solution inlet port (31) is connected with the absorption tower taphole (24), the regenerator solution
Outlet (32) is connected with the absorption tower solution inlet port (23), and the indirect steam outlet (33) heats the hygroscopic solution
The indirect steam discharge evaporated.
2. the ultra-clean cold-heat combined system of discharge in coke-oven plant as described in claim 1, it is characterised in that：The ultra-clean row in coke-oven plant
It lets cool hot co-generation system and further includes at least one heat exchanger, the boiler flue gas outlet (12) and/or indirect steam outlet
(33) be connected simultaneously heat exchange at least one heat exchanger.
3. the ultra-clean cold-heat combined system of discharge in coke-oven plant as described in claim 1, it is characterised in that：The absorption tower (2) is also
With absorption tower low-temperature receiver import (25), absorption tower low-temperature receiver outlet (26), the absorption tower low-temperature receiver import (25), absorption tower low-temperature receiver go out
It is connected between mouth (26) by absorption tower low-temperature receiver pipeline, the working medium in the absorption tower low-temperature receiver pipeline and the absorption tower (2)
Inside working medium carry out heat exchange.
4. the ultra-clean cold-heat combined system of discharge in coke-oven plant as claimed in claim 3, it is characterised in that：The absorption tower low-temperature receiver goes out
Mouth (26) is connected at least one heat exchanger and heat exchange.
5. the ultra-clean cold-heat combined system of discharge in coke-oven plant as described in claim 1, it is characterised in that：The regenerator (3) is also
With regenerator heat source import (34), regenerator thermal source outlet (35), the regenerator heat source import (34) and the regenerator
It is connected between thermal source outlet (35) by regenerator heat source pipeline, the working medium in the regenerator heat source pipeline and the regeneration
The working medium of the inside of device (3) carries out heat exchange, and the regenerator heat source import (34) exports (14) with the boiler low-temperature receiver and is connected
It is logical.
6. the ultra-clean cold-heat combined system of discharge in coke-oven plant as claimed in claim 5, it is characterised in that：The regenerator heat source goes out
Mouth (35) is connected at least one heat exchanger and heat exchange.
7. the ultra-clean cold-heat combined system of discharge in coke-oven plant as described in claim 2,4 or 6, it is characterised in that：The coke-oven plant
The ultra-clean cold-heat combined system of discharge further includes absorption refrigeration unit (4), the absorption refrigeration unit (4) and at least one institute
Heat exchanger is stated to be connected and heat exchange.
8. the ultra-clean cold-heat combined system of discharge in coke-oven plant as described in claim 1, which is characterized in that the ultra-clean row in coke-oven plant
Hot co-generation system is let cool to further include：
First Heat Exchanger (5), the First Heat Exchanger (5) positioned at the boiler flue gas outlet (12) and the adsorption tower smoke into
Between mouthful (21), the First Heat Exchanger (5) have the first gas inlet (51), the first exhanst gas outlet (52), the first low-temperature receiver into
Mouth (53), the first low-temperature receiver outlet (54), first gas inlet (51), the first exhanst gas outlet pass through the first flue gas between (52)
Pipeline is connected, and is connected between the first low-temperature receiver import (53), the first low-temperature receiver outlet (54) by the first low-temperature receiver pipeline, institute
The flue gas stated in the first flue carries out heat exchange, the boiler flue gas outlet with the working medium in the first low-temperature receiver pipeline
(12) it is connected with first gas inlet (51), first exhanst gas outlet (52) and the adsorption tower smoke import (21)
It is connected；
Second heat exchanger (6), second heat exchanger (6) have the second low-temperature receiver import (61), the second low-temperature receiver outlet (62), second
Heat source import (63), Secondary Heat Source outlet (64), by the between the second low-temperature receiver import (61), the second low-temperature receiver outlet (62)
Two low-temperature receiver pipelines are connected, and pass through Secondary Heat Source pipeline phase between the Secondary Heat Source import (63), Secondary Heat Source outlet (64)
It connects, the working medium in the second low-temperature receiver pipeline carries out heat exchange, second heat with the working medium in the Secondary Heat Source pipeline
Source import (63) is connected with indirect steam outlet (33), and the Secondary Heat Source outlet (64) is connected with exterior line,
It is interconnected between the second low-temperature receiver import (61), the second low-temperature receiver outlet (62), the first low-temperature receiver outlet (54)；
Third heat exchanger (7), the third heat exchanger (7) have third low-temperature receiver import (71), third low-temperature receiver outlet (72), third
Heat source import (73), third thermal source outlet (74), by the between the third low-temperature receiver import (71), third low-temperature receiver outlet (72)
Three low-temperature receiver pipelines are connected, and pass through third heat source pipeline phase between the third heat source import (73), third thermal source outlet (74)
It connects, the working medium in the third low-temperature receiver pipeline carries out heat exchange, the third heat with the working medium in the third heat source pipeline
Source import (73) is connected with indirect steam outlet (33), and the third thermal source outlet (74) exports with the Secondary Heat Source
(64) it is connected, the third low-temperature receiver import (71), third low-temperature receiver outlet (72) are connected with the exterior line.
9. the ultra-clean cold-heat combined system of discharge in coke-oven plant as claimed in claim 8, it is characterised in that：
The absorption tower (2) also have absorption tower low-temperature receiver import (25), absorption tower low-temperature receiver outlet (26), the absorption tower low-temperature receiver into
It is connected between mouth (25), absorption tower low-temperature receiver outlet (26) by absorption tower low-temperature receiver pipeline, the work of the absorption tower low-temperature receiver pipeline
Matter and the working medium of the inside on the absorption tower (2) carry out heat exchange；
The regenerator (3) also have regenerator heat source import (34), regenerator thermal source outlet (35), the regenerator heat source into
It is connected between mouth (34) and the regenerator thermal source outlet (35) by regenerator heat source pipeline, the regenerator heat source pipeline
Interior working medium and the working medium of the inside of the regenerator (3) carry out heat exchange, the regenerator heat source import (34) and the pot
Furnace cooling source outlet (14) is connected；
The ultra-clean cold-heat combined system of discharge in the coke-oven plant further includes the 4th heat exchanger (8), and the 4th heat exchanger (8) has the
Four low-temperature receiver imports (81), the 4th low-temperature receiver outlet (82), the 4th heat source import (83), the 4th thermal source outlet (84), the described 4th is cold
It is connected between source import (81), the 4th low-temperature receiver outlet (82) by the 4th low-temperature receiver pipeline, the 4th heat source import (83), the
Four thermal source outlets are connected between (84) by the 4th heat source pipeline, the working medium in the 4th low-temperature receiver pipeline and the described 4th heat
Working medium in source capsule road carries out heat exchange, and the 4th heat source import (83) is connected with the regenerator thermal source outlet (35),
4th thermal source outlet (84) is connected with the exterior line, the 4th low-temperature receiver import (81) and the absorption tower low-temperature receiver
Outlet (26) is connected, and the 4th low-temperature receiver outlet (82) is connected with the third low-temperature receiver import (71).
10. the ultra-clean cold-heat combined system of discharge in coke-oven plant as claimed in claim 8, it is characterised in that：The coke-oven plant is ultra-clean
It discharges cold-heat combined system and further includes absorption refrigeration unit (4), the absorption refrigeration unit (4) has refrigeration unit heat source
Import (41), refrigeration unit thermal source outlet (42), refrigeration unit chilled water import (43), refrigeration unit chilled water outlet (44),
It is connected between the refrigeration unit heat source import (41), refrigeration unit thermal source outlet (42) by refrigeration unit heat source pipeline,
The refrigeration unit chilled water import (43), refrigeration unit chilled water outlet are connected between (44) by chilled water pipeline, institute
The chilled water stated in chilled water pipeline carries out heat exchange with the working medium in the refrigeration unit heat source pipeline, and the refrigeration unit is cold
Freeze water inlet (43), refrigeration unit chilled water outlet (44) is connected with the external pipe, the refrigeration unit heat source import
(41) it is connected with first low-temperature receiver outlet (54), the refrigeration unit thermal source outlet (42) and the first low-temperature receiver import
(53) it is connected.
11. the ultra-clean cold-heat combined system of discharge in coke-oven plant as described in claim 1, it is characterised in that：The coke-oven plant is ultra-clean
It discharges cold-heat combined system and further includes heater (10), the heater (10) includes coke oven flue gas import (101), coke oven flue gas
Export (102), heating source import (103), heating source outlet (104), the coke oven flue gas import (101), coke oven flue gas outlet
(102) it is connected between by coke oven flue gas pipeline, by adding between the heating source import (103), heating source outlet (104)
Heat source pipeline is connected, and the flue gas in the coke oven flue gas pipeline carries out heat exchange, institute with the working medium in the heating source pipeline
Coke oven flue gas outlet (102) is stated with the denitration gas inlet (91) to be connected.
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| CN201710558062.8A CN108131656B (en) | 2017-07-10 | 2017-07-10 | Ultra-clean emission cold and hot co-production system of coking plant |
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Cited By (1)
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