CN110229681A - A kind of raw coke oven gas waste heat comprehensive utilization system - Google Patents
A kind of raw coke oven gas waste heat comprehensive utilization system Download PDFInfo
- Publication number
- CN110229681A CN110229681A CN201910481117.9A CN201910481117A CN110229681A CN 110229681 A CN110229681 A CN 110229681A CN 201910481117 A CN201910481117 A CN 201910481117A CN 110229681 A CN110229681 A CN 110229681A
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- CN
- China
- Prior art keywords
- subsystem
- coke oven
- raw coke
- oven gas
- heat exchanger
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention discloses a kind of systems utilized in relation to raw coke oven gas residual heat integrative, including high temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem, tar separation subsystem and middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem.The waste heat is recycled by vertical shell-and-tube heat exchanger, drum and sink, and wherein saturated water absorbs raw coke oven gas waste heat in heat exchanger, is gasificated into high steam；The tar separation subsystem includes gas-liquid separator, control valve, ammonia spray device and tar separation slot.The present invention had not only improved the utilization efficiency of energy, but also realized the recycling of useful component, had important engineering significance.
Description
Technical field
The present invention relates to a kind of raw coke oven gas waste heat comprehensive utilization systems, belong to industrial afterheat recovery technical field.
Background technique
Coking industry is important energy production departments, and a large amount of residual heat resources are produced in process of coking.It faces
Increasingly serious environment situation and fining production there is an urgent need to waste heat recycling seems increasingly important.
The raw gas temperature escaped from coke furnace carbonization chamber is 650~700 DEG C, and raw coke oven gas takes heat out of and accounts for coke oven expenditure heat about
33.76%.Process flow general at present: it is first directly contacted in bridge tube and gas collecting tube spray cycle ammonium hydroxide with raw coke oven gas, by following
Ring ammonium hydroxide largely vaporizes, and raw coke oven gas is made sharply to cool down, and the raw coke oven gas after cooling is cooled down with cooling water indirectly again in primary cooler, ammonia
Moisture is recycled after separating out tar.In the technical process, the cooled ammonium hydroxide of a large amount of thermal energy contained in raw coke oven gas is taken away,
Ammonium hydroxide after cooling consumes a large amount of ammonium hydroxide, increases production cost, exist simultaneously more than raw coke oven gas by discharging after evaporation deamination
The problem of thermal resource can not be recycled effectively and is lost.
Summary of the invention
The technical problem to be solved by the invention is to provide one kind can be achieved classification recycling, can reduce ammonium hydroxide usage amount with
And the raw coke oven gas waste heat comprehensive utilization system of efficiency of energy utilization can be improved.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
A kind of raw coke oven gas waste heat comprehensive utilization system, including respectively through sequentially connected high temperature section UTILIZATION OF VESIDUAL HEAT IN of control valve
System, tar separation subsystem and middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem；
The high temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem includes surge bunker, vertical shell-and-tube heat exchanger a, drum a, liquid pump a and sink
A, high temperature raw coke oven gas enter vertical shell-and-tube heat exchanger a through surge bunker after tedge evolution, are gasificated into high pressure after working medium heat absorption
Steam is transported in the drum a for switched energization, and the vertical shell-and-tube heat exchanger a is exported to the tar separation subsystem
Medium temperature raw coke oven gas, the liquid pump a connection sink a, for working medium needed for supplying the subsystem；
The tar separation subsystem includes gas-liquid separator, tar separation slot a, liquid pump c and ammonium hydroxide mixing channel, the gas
Liquid/gas separator includes upper end input port, ammonia spray device, lower end outlet and upper end exhaust pipe, and medium temperature raw coke oven gas is described
Lower end outlet described in lease making is recombinated in gas-liquid separator in condensation and enters the tar separation slot, light component and ammonia warp
The upper end exhaust pipe is input to the middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem, and the liquid pump c connection ammonium hydroxide mixing channel is used for
Working medium needed for supplying the subsystem；
The middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem includes vertical shell-and-tube heat exchanger b, drum b, liquid pump b, sink b and tar
Separating tank b, light component and ammonia enter in the vertical shell-and-tube heat exchanger b, are gasificated into high steam after working medium heat absorption and are transported to
Switched energization is used in the drum b, the vertical shell-and-tube heat exchanger b is additionally provided with lower port, for light component condensate drainage into
Enter the tar separation slot b, the liquid pump b connection sink b, for working medium needed for supplying the subsystem.
Further, the surge bunker outlet is equipped with filter plate, for standing solid particle and preventing from entering described vertical
Formula shell-and-tube heat exchanger a flow velocity is too fast.
Further, flowmeter is equipped in the control valve, for controlling raw coke oven gas flow.
Further, the ammonia spray device is distributed around the gas-liquid separator lumen circumference array.
Further, the high temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem and the middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem use working medium
For saturated water.
Further, tar separation subsystem uses working medium for ammonia water mixture.
Advantageous effects of the invention: the present invention, which is classified, recycles raw coke oven gas waste heat, reduce the use of ammonium hydroxide
Amount, reduces production cost, also improves the utilization efficiency of the energy.It is molten using tarry distillate during heat recovery
Boiling point has the characteristics of obvious discrimination, and some useful components can be recycled, and increases the economy of system.
Detailed description of the invention
Fig. 1 is gas-liquid separator the schematic diagram of the section structure in embodiment；
Fig. 2 is the system structure diagram；
Description of symbols: 1- surge bunker, 2a- vertical shell-and-tube heat exchanger a, 2b- vertical shell-and-tube heat exchanger b, 3a- drum a,
3b- drum b, 4a- liquid pump a, 4b- liquid pump b, 4c- liquid pump c, 5a- sink a, 5b- sink b, 6- gas-liquid separator, 7a- control valve
A, 7b- control valve b, 8a- tar separation slot a, 8b- tar separation slot b, 9- ammonium hydroxide mixing channel.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
A kind of system utilized in relation to raw coke oven gas residual heat integrative as shown in Figure 2, including high temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem,
Tar separation subsystem and middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem.
High temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem includes surge bunker 1, vertical shell-and-tube heat exchanger 2a, drum 3a, liquid pump 4a and sink
5a, high temperature raw coke oven gas enter vertical shell-and-tube heat exchanger 2a through surge bunker 1 after tedge evolution, and vertical shell-and-tube heat exchanger 2a is defeated
Medium temperature raw coke oven gas out, medium temperature raw coke oven gas enter tar separation subsystem by pipeline, control valve 7a are equipped in connecting pipe,
Tar separation subsystem includes gas-liquid separator 6, tar separation slot 8a, liquid pump 4c and ammonium hydroxide mixing channel 9, through gas-liquid separator 6
Purified medium temperature raw coke oven gas is input to middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem, is equipped with control valve 7b, middle-temperature section in connecting pipe
UTILIZATION OF VESIDUAL HEAT IN subsystem includes vertical shell-and-tube heat exchanger 2b, tar separation slot 8b, drum 3b, liquid pump 4b and sink 5b, vertical tube
The shell lower end heat exchanger 2b is connected with tar separation slot 8b, for discharging the light oil mixed liquor of condensation, in control valve 7a, 7b
Flowmeter is filled, can be used for controlling the raw coke oven gas flow flowed in pipeline.
Specifically, vertical shell-and-tube heat exchanger 2a is connected with surge bunker 1, the high temperature raw coke oven gas that coke oven generates is escaped from tedge
Vertical shell-and-tube heat exchanger 2a first is being entered through surge bunker 1 afterwards, and the outlet of surge bunker 1 is equipped with filtering baffle, can be used for standing solid
Body particle and prevent enter heat exchanger flow velocity it is too fast.High temperature raw coke oven gas enters vertical shell-and-tube heat exchanger 2a shell side, and saturated water exists
Heat is taken in tube side.Saturated water is gasificated into high steam and is transported to drum 3a, and high steam exports high temperature and high pressure steam through drum 3a,
It can be used for generating electricity.The vertical shell-and-tube port heat exchanger 2a exports medium temperature raw coke oven gas.
Gas-liquid separator 6 uses as shown in Figure 1,6 upper port of gas-liquid separator exports raw coke oven gas, and heavy constituent is discharged in lower port
Tar and impurity.Ammonia spray device is installed above the medium temperature raw coke oven gas input port of gas-liquid separator 6.Ammonia spray device around
Separator circumference array distribution, it is ensured that ammonium hydroxide comes into full contact with raw coke oven gas.Gas-liquid separator 6 is in tar separation subsystem
Important device, be connected with middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem.Setting can refer to as follows herein: the famine that gas-liquid separator 6 inputs
Coal gas initial temperature is 500 DEG C, and the ammonium hydroxide initial temperature of input is 85 DEG C, and raw coke oven gas (containing ammonia) temperature of output is 220 DEG C.
Medium temperature the raw coke oven gas impurity such as heavy constituent tar and pitch, gas-liquid separator 6 in condensation in gas-liquid separator 6
Tar containing light component and a large amount of ammonias in the raw coke oven gas of output, raw coke oven gas are input to middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem.Middle-temperature section
UTILIZATION OF VESIDUAL HEAT IN subsystem takes heat by saturated water in vertical shell-and-tube heat exchanger 2b tube side, and medium temperature raw coke oven gas exchanges heat in vertical shell-and-tube
Flowing in device 2b shell side.Vertical shell-and-tube heat exchanger 2b lower port controls discharge light component tar by valve.
Working medium needed for liquid pump 4a, liquid pump 4b, liquid pump 4c are respectively fed to corresponding subsystem.UTILIZATION OF VESIDUAL HEAT IN subsystem is adopted
Working medium is saturated water, and liquid pump 4a/4b is connect with sink 4a/4b, enters vertical shell-and-tube heat exchanger 2a/ through drum 3a/3b
2b, the working medium that tar separation subsystem uses is ammonia water mixture, and liquid pump 4c connect with ammonium hydroxide mixing channel 9, ammonia spray device
Connection, for ammonia water mixture in gas-liquid separator 6 and raw coke oven gas heat exchange, the cooling precipitation heavy constituent tar and pitch etc. of raw coke oven gas is miscellaneous
Matter, for ammonium hydroxide by thermal evaporation, the raw coke oven gas of tar containing light component and a large amount of ammonias is input to middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem, saturation
The heat that water absorbs gaseous mixture is gasificated into high steam and is transported to drum 3a/3b, and high steam is high through drum 3a/3b output high temperature
Steam is pressed, can be used for generating electricity.
Above system structure not only effectively reduces the usage amount of ammonium hydroxide, reduces by the way that multi-stage heat exchanger system is arranged
This, can also effectively improve the utilization efficiency of raw coke oven gas waste heat, and can realize the classification recycling of tar ingredients, and above system is in waste heat
Efficient combination in terms of using energy source and resource reclaim, significantly increases the economy of system.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of raw coke oven gas waste heat comprehensive utilization system, characterized in that including respectively through more than the sequentially connected high temperature section of control valve
Heat utilization subsystem, tar separation subsystem and middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem；
The high temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem includes surge bunker (1), vertical shell-and-tube heat exchanger a (2a), drum a (3a), liquid pump a
(4a) and sink a (5a), high temperature raw coke oven gas enter vertical shell-and-tube heat exchanger a (2a) through surge bunker (1) after tedge evolution,
High steam is gasificated into after working medium heat absorption to be transported in the drum a (3a) for switched energization, the vertical shell-and-tube heat exchanger a
(2a) Xiang Suoshu tar separation subsystem exports medium temperature raw coke oven gas, and the liquid pump a (4a) connects the sink a (5a), for supplying
To working medium needed for the subsystem；
The tar separation subsystem includes gas-liquid separator (6), tar separation slot a (8a), liquid pump c (4c) and ammonium hydroxide mixing channel
9, the gas-liquid separator (6) includes upper end input port, ammonia spray device, lower end outlet and upper end exhaust pipe, medium temperature
Raw coke oven gas recombinates lower end outlet described in lease making in the gas-liquid separator (6) and enters the tar separation slot in condensation
(8a), light component and ammonia are input to the middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem, the liquid pump c (4c) through the upper end exhaust pipe
The ammonium hydroxide mixing channel 9 is connected, for working medium needed for supplying the subsystem；
The middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem includes vertical shell-and-tube heat exchanger b (2b), drum b (3b), liquid pump b (4b), sink b
(5b) and tar separation slot b (8b), light component and ammonia enter in the vertical shell-and-tube heat exchanger b (2b), after working medium heat absorption
It is gasificated into high steam to be transported in the drum b (3b) for switched energization, the vertical shell-and-tube heat exchanger b (2b) is additionally provided with
Lower port enters the tar separation slot b (8b) for light component condensate drainage, and the liquid pump b (4b) connects the sink b
(5b), for working medium needed for supplying the subsystem.
2. a kind of raw coke oven gas waste heat comprehensive utilization system according to claim 1, characterized in that the surge bunker (1) goes out
Mouth is equipped with filter plate, for standing solid particle and preventing too fast into vertical shell-and-tube heat exchanger a (2a) flow velocity.
3. a kind of raw coke oven gas waste heat comprehensive utilization system according to claim 1, characterized in that be equipped in the control valve
Flowmeter, for controlling raw coke oven gas flow.
4. a kind of raw coke oven gas waste heat comprehensive utilization system according to claim 1, characterized in that the ammonia spray device
It is distributed around the gas-liquid separator (6) lumen circumference array.
5. a kind of raw coke oven gas waste heat comprehensive utilization system according to claim 1, characterized in that the high temperature section waste heat benefit
Use working medium for saturated water with subsystem and the middle-temperature section UTILIZATION OF VESIDUAL HEAT IN subsystem.
6. a kind of raw coke oven gas waste heat comprehensive utilization system according to claim 1, characterized in that tar separation subsystem is adopted
It is ammonia water mixture with working medium.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910481117.9A CN110229681A (en) | 2019-06-04 | 2019-06-04 | A kind of raw coke oven gas waste heat comprehensive utilization system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910481117.9A CN110229681A (en) | 2019-06-04 | 2019-06-04 | A kind of raw coke oven gas waste heat comprehensive utilization system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619848A (en) * | 2008-06-30 | 2010-01-06 | 上海梅山钢铁股份有限公司 | System and method for recovering waste heat of coke-oven crude gas |
| CN103194274A (en) * | 2013-04-16 | 2013-07-10 | 中冶焦耐工程技术有限公司 | Coke oven gas afterheat recovering method and device |
| CN203174056U (en) * | 2013-04-16 | 2013-09-04 | 中冶焦耐工程技术有限公司 | Waste heat recovery device for coke oven coal gas |
-
2019
- 2019-06-04 CN CN201910481117.9A patent/CN110229681A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619848A (en) * | 2008-06-30 | 2010-01-06 | 上海梅山钢铁股份有限公司 | System and method for recovering waste heat of coke-oven crude gas |
| CN103194274A (en) * | 2013-04-16 | 2013-07-10 | 中冶焦耐工程技术有限公司 | Coke oven gas afterheat recovering method and device |
| CN203174056U (en) * | 2013-04-16 | 2013-09-04 | 中冶焦耐工程技术有限公司 | Waste heat recovery device for coke oven coal gas |
Non-Patent Citations (1)
| Title |
|---|
| 余诚桓: "焦炉荒煤气余热回收技术应用与实践", 《燃料与化工》 * |
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Application publication date: 20190913 |