CN108275653A - A kind of steam reformer flue gas heat recycling system and method - Google Patents
A kind of steam reformer flue gas heat recycling system and method Download PDFInfo
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- CN108275653A CN108275653A CN201810241846.2A CN201810241846A CN108275653A CN 108275653 A CN108275653 A CN 108275653A CN 201810241846 A CN201810241846 A CN 201810241846A CN 108275653 A CN108275653 A CN 108275653A
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- reburner
- flue gas
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- reformer
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 239000003546 flue gas Substances 0.000 title claims abstract description 63
- 238000004064 recycling Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 claims abstract description 66
- 239000007789 gas Substances 0.000 claims abstract description 59
- 239000000446 fuel Substances 0.000 claims abstract description 44
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 20
- 239000001257 hydrogen Substances 0.000 claims abstract description 20
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 6
- 238000006477 desulfuration reaction Methods 0.000 claims description 6
- 230000023556 desulfurization Effects 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 238000001179 sorption measurement Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 235000019504 cigarettes Nutrition 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000001991 steam methane reforming Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 206010030973 Oral discomfort Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0283—Processes for making hydrogen or synthesis gas containing a CO-shift step, i.e. a water gas shift step
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/08—Methods of heating or cooling
- C01B2203/0805—Methods of heating the process for making hydrogen or synthesis gas
- C01B2203/0811—Methods of heating the process for making hydrogen or synthesis gas by combustion of fuel
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/16—Controlling the process
- C01B2203/169—Controlling the feed
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/16—Controlling the process
- C01B2203/1695—Adjusting the feed of the combustion
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- Hydrogen, Water And Hydrids (AREA)
Abstract
The present invention relates to steam reformer flue gas heat recycling system and methods.It include the first pre reformer feed superheater being connected by pipeline sequence, second pre reformer feed superheater, pre reformer, first reburner feed superheater, second reburner feed superheater and reburner, first pre reformer feed superheater is for receiving unstripped gas or the hydrogen of cycle, reburner is for reacting hydrogen, drum is also associated with flue gas air inlet pipe and high steam snorkel, flue gas air inlet pipe is for receipt source in the flue gas of reburner, high steam snorkel is for sending the high steam that drum generates outside, drum is additionally provided with the flue gas circulating line recycled for flue gas, flue gas circulating line is equipped with flue gas heat-exchanger, reburner is connected with combustion air supply line, high-pressure fuel supply pipeline and low pressure resolution gas supply line.Reburner flue gas heat fully recycles in the present invention, takes full advantage of the low pressure resolution gas for torch of setting fire.
Description
Technical field
The present invention relates to HYCO devices, more particularly, to a kind of steam reformer flue gas heat recycling system and side
Method.
Background technology
SMR is the abbreviation of Steam Methane Reforming, imply that it is steam methane reforming, be using natural gas, liquefaction
Oil gas or naphtha, refinery tail-gas are as raw material, and with vapor at a temperature of about 800~850 DEG C, reaction generates synthesis
The HyCO production technologies of gas (using carbon monoxide and hydrogen as key component).
The general technology condition of industrial production hydrogen is：SMR reaction production synthesis gas, then CO and water convert anti-
It answers, hydrogen, i.e. Reformer+ transformation most is made through pressure-variable adsorption (Pressure Swing Adsorption. abbreviation PSA) afterwards
+ PSA technique productions hydrogen.Key reaction includes：
Conversion of methane：CnHm+nH2O=nCO+ (m/2+n) H2
Transformationreation：CO+H2O=H2+CO2
It prepares sending outside of generating during hydrogen currently, above-mentioned steam utilization is poor, and low pressure resolution gas about 10% is opened
Degree is set fire torch, and low-pressure fuel is set fire torch again, is not made full use of this stock material, reburner is not given to provide more heats, existed
The case where energy dissipation.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of steam reformer cigarettes
Road gas heat recycling system and method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of steam reformer flue gas heat recycling system includes the first pre-inversion being connected by pipeline sequence
Stove feed superheater, the second pre reformer feed superheater, pre reformer, the first reburner feed superheater, the second reburner
Feed superheater and reburner,
The first pre reformer feed superheater is for receiving unstripped gas or the hydrogen of cycle, and the reburner is for anti-
Hydrogen is answered,
Prerotation is drawn on pipeline between the first pre reformer feed superheater and the second pre reformer feed superheater
Change stove feeds bypass, and pre reformer charging bypass converges into the first pre reformer feed superheater and second in advance after drum
On pipeline between reburner feed superheater,
On pipeline between the first reburner feed superheater and the second reburner feed superheater draw reburner into
Material bypass, reburner charging bypass converge into the first reburner feed superheater after drum and were fed with the second reburner
On pipeline between hot device,
The drum is also associated with flue gas air inlet pipe and high steam snorkel, and the flue gas air inlet pipe is for receiving
From the flue gas of reburner, the high steam snorkel is for sending the high steam that drum generates outside, the drum
It is additionally provided with the flue gas circulating line recycled for flue gas, the flue gas circulating line is equipped with flue gas heat-exchanger,
The reburner is connected with combustion air supply line, is provided with for combustion-supporting on combustion air supply line
The air preheater that air is preheated,
The reburner is also associated with high-pressure fuel supply pipeline and low pressure resolution gas supply line.
The air preheater includes the first combustion-supporting air preheater being arranged on combustion air supply line and
Two combustion-supporting air preheaters, being arranged on the combustion air supply line can make combustion air not by the first combustion air
The combustion air of preheater bypasses, and being arranged on the combustion air supply line can make combustion air combustion-supporting not by second
The combustion air of air preheater bypasses.
To second at the node of combustion air bypass and combustion air supply line before the second combustion-supporting air preheater
It is provided with the positive line control valve of combustion air on pipeline between combustion-supporting air preheater, is arranged in the combustion air bypass and helps
Fire air bypass regulating valve.
It is provided with air blower and blast regulator on combustion air supply line before first combustion-supporting air preheater,
First combustion-supporting air preheater is also connected with gas exhaust piping, and air-introduced machine and pressure regulation are provided on the gas exhaust piping
Valve.
Pipeline between first pre reformer feed superheater and the second pre reformer feed superheater is equipped with pre-inversion
Stove feeds positive line control valve, and the pre reformer charging bypass is equipped with pre reformer and feeds bypass valve.
Pipeline between first reburner feed superheater and the second reburner feed superheater is fed equipped with reburner
Positive line control valve, the reburner charging bypass are equipped with reburner and feed bypass valve.
Steam superheater, high pressure steam control valve and high steam are sequentially set on the high steam snorkel to send outside
Flowmeter.
The high-pressure fuel supply pipeline is equipped with high pressure fuel into reburner flow control valve and high pressure fuel into conversion
Stove flowmeter.
The low pressure resolution gas supply line is equipped with low-pressure fuel heat release torch regulating valve.
The unstripped gas is the gaseous mixture of natural gas (NG) and liquefied gas (LPG), can also be with naphtha, refinery tail-gas
As raw material.
The resolution gas refer to reburner generate hydrogen after pressure swing adsorption hydrogen production, pressure-variable adsorption link is resolved
A kind of gas, main component be carbon monoxide, the gases such as hydrogen sulfide.
Steam reformer flue gas heat recovery and utilization method is carried out based on above system, is included the following steps：
Unstripped gas and product circulating hydrogen mixing desulfurization, introduce after desulfurization first strand of steam enter the first pre reformer into
Expect superheater, the second pre reformer feed superheater, pre reformer, generates H2、CO、CH4,
Then it introduces second strand of steam and enters the first reburner feed superheater, the second reburner feed superheater and conversion
Stove, the reaction was continued generates H2、CO、CH4,
Cooling enters shift-converter, CO and H2O the reaction was continued generate H2、CO2, continue to be cooled to room temperature enter PSA into
Row H2Purification, H2Client is given outside as product,
The low pressure resolution gas parsed from PSA burns as low-pressure fuel into reburner, and heat is provided to reburner,
Second combustion-supporting air preheater for realizing flue gas and air heat exchange,
By adjust the positive line control valve of combustion air, combustion air bypass valve, pre reformer feed bypass valve,
Pre reformer feeds positive line control valve, reburner charging bypass valve, reburner charging main track control valve opening and makes full use of
The temperature of flue gas increases the steam amount of sending outside more to give drum evaporated vapor,
The air quantity of reburner is controlled by blast regulator, and the hearth vacuum control of reburner is in -20mmH2O, reburner heat
Amount is provided by high pressure fuel, low pressure resolution gas.
When low-pressure fuel heat release torch control valve opening is 0%, high pressure fuel amount is controlled in minimum 80NM/H, high steam
The amount of sending outside maintains 3500NM/H, and than not using more 1000NM/H before technical scheme of the present invention, here it is flue gas heat
Amount recycling is to increase the operating method of steam.
By adjusting blast regulator, Boiler pressure control in 14400NM/H, the hearth vacuum control of reburner-
20mmH2O adjusts the positive line control valve of combustion air, combustion air bypass valve controls the amount of flue gas to ensure flue gas
Heat exchanger is high into drum temperature, such producing steam multiple spot.Adjust pre reformer charging bypass valve, pre reformer feeds main track
Regulating valve, reburner charging bypass valve, reburner feed positive line control valve and ensure that unstripped gas is more into drum amount, heat
More, producing steam is just more, and unstripped gas increases fuel quantity into conversion furnace temperature with regard to low, increases low pressure parsing tolerance into reburner,
Low-pressure fuel heat release torch control valve opening keeps 0%, and high pressure fuel maintains 80NM/H into reburner flowmeter.
A kind of implementation of the present invention is：
1, by turning down combustion air main track control valve opening to 20%, combustion air bypass valve aperture is opened extremely
100%, cold air only has 20% to enter the second combustion-supporting air preheater and flue gas to exchange heat, it is most of by combustion air by
Road regulating valve, the relatively low air of relative temperature enters to burn into reburner, to ensure that conversion outlet of still reaches set temperature, just
Increase fuel quantity and provide heat to reburner, the automatic low pressure parsing tolerance that increases ensures outlet of still temperature into reburner burning
Degree.Flue gas heat-exchanger relative temperature is just high, just high to drum temperature, to which output steam is with regard to multiple spot.
2, continue to adjust：Big pre reformer charging bypass valve aperture is opened, pre reformer feeds positive line control valve and maintains
100% aperture goes the amount of drum more in this way, and heat is also more, and such producing steam is also more.
3, continue to adjust：Big reburner charging bypass valve aperture is opened, reburner feeds positive line control valve and maintains 100%
Aperture goes the amount of drum more in this way, and heat is also more, and such producing steam is also more.Unstripped gas own temperature just lowers, into turn
It is also low to change furnace temperature, in order to ensure to convert heater outlet temperature, is increased by fuel, continues growing low pressure resolution gas and remove reburner
Amount, until low pressure resolution gas is all into reburner burning, low-pressure fuel heat release torch control valve opening 0%, and high pressure fuel
Minimum flow 80NM/H is maintained, blast regulator maintains 14400NM/H, and the hearth vacuum control of reburner is in -20mmH2O,
High pressure steam control valve aperture increases in this way, sends quantity of steam outside and maintains 3500NM/H.
Compared with prior art, the present invention has the following advantages：
One, reburner flue gas heat fully recycles.
Two, the low pressure resolution gas for torch of setting fire is made full use of.
Three, economic benefit is increased.
Four, this pipeline valve is remote control, need not increase manpower.
Description of the drawings
Fig. 1 is steam reformer flue gas heat recycling system structural schematic diagram in embodiment 1.
Shown in figure label：1 is blast regulator, and 2 be air blower, and 3 be pressure regulator valve, and 4 be air-introduced machine, and 5 be drum, and 6 are
First combustion-supporting air preheater, 7 be flue gas heat-exchanger, and 8 be high pressure steam control valve, and 9 send flowmeter outside for high steam, 10
It is the positive line control valve of combustion air for steam superheater, 11,12 be the second combustion-supporting air preheater, and 13 adjust for combustion air bypass
Valve is saved, 14 be the first pre reformer feed superheater, and 15 feed bypass valve for pre reformer, and 16 feed just for pre reformer
Line control valve, 17 be the second pre reformer feed superheater, and 18 be pre reformer, and 19 feed bypass valve for reburner, 20
Positive line control valve is fed for reburner, 21 be the first reburner feed superheater, and 22 be the second reburner feed superheater, and 23 are
Reburner, 24 be low-pressure fuel heat release torch regulating valve, 25 for high pressure fuel into reburner flow control valve, 26 be high pressure fuel
Into reburner flowmeter.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
With reference to figure 1, a kind of steam reformer flue gas heat recycling system includes the to be connected by pipeline sequence
One pre reformer feed superheater 14, the second pre reformer feed superheater 17, pre reformer 18, the first reburner charging overheat
Device 21, the second reburner feed superheater 22 and reburner 23, the first pre reformer feed superheater 14 is for receiving unstripped gas
Or the hydrogen of cycle, reburner 23 is for reacting hydrogen, in the first pre reformer feed superheater 14 and the second pre reformer
Pre reformer charging bypass is drawn on pipeline between feed superheater 17, pre reformer charging bypass converges after drum 5
It flow on the pipeline between the first pre reformer feed superheater 14 and the second pre reformer feed superheater 17, in the first conversion
Reburner charging bypass, the reburner are drawn on pipeline between stove feed superheater 21 and the second reburner feed superheater 22
Charging bypass is converged into after drum 5 first reburner feed superheater 21 and the second reburner feed superheater 22
On pipeline, drum 5 is also associated with flue gas air inlet pipe and high steam snorkel, and flue gas air inlet pipe is for receipt source in turning
Change the flue gas of stove 23, for sending the high steam that drum 5 generates outside, drum 5 is additionally provided with for cigarette high steam snorkel
The flue gas circulating line of road gas cycle, flue gas circulating line are equipped with flue gas heat-exchanger 7, and reburner 23 is connected with combustion-supporting
Air supply pipeline is provided with the air preheater for being preheated to combustion air on combustion air supply line,
Reburner 23 is also associated with high-pressure fuel supply pipeline and low pressure resolution gas supply line.
Air preheater includes that the first combustion-supporting air preheater 6 being arranged on combustion air supply line is helped with second
Air preheater 12 is fired, being arranged on combustion air supply line can make combustion air not by the first combustion-supporting air preheater
6 combustion air bypass, being arranged on combustion air supply line can be such that combustion air is not preheated by the second combustion air
The combustion air of device 12 bypasses.Combustion air bypass before the second combustion-supporting air preheater 12 and combustion air supply line
To being provided with the positive line control valve 11 of combustion air on the pipeline between the second combustion-supporting air preheater 12 at node, by combustion air
Road is provided with combustion air bypass valve 13.It is arranged on combustion air supply line before the first combustion-supporting air preheater 6
There are air blower 2 and blast regulator 1, the first combustion-supporting air preheater 6 to be also connected with gas exhaust piping, air inducing is provided on gas exhaust piping
Machine 4 and pressure regulator valve 3.
Pipeline between first pre reformer feed superheater 14 and the second pre reformer feed superheater 17 is equipped with pre-
Reburner feeds positive line control valve 16, and pre reformer charging bypass is equipped with pre reformer and feeds bypass valve 15.First turn
Change the pipeline between stove feed superheater 21 and the second reburner feed superheater 22 and is equipped with the positive line control valve of reburner charging
20, reburner charging bypass is equipped with reburner and feeds bypass valve 19.
Steam superheater 10, high pressure steam control valve 8 and high steam is sequentially set on high steam snorkel to send outside
Flowmeter 9.High-pressure fuel supply pipeline is equipped with high pressure fuel into reburner flow control valve 25 and high pressure fuel into reburner
Flowmeter 26.Low pressure resolution gas supply line is equipped with low-pressure fuel heat release torch regulating valve 24.
Wherein, unstripped gas is the gaseous mixture of natural gas and liquefied gas, can also be using naphtha, refinery tail-gas as former
Material.Resolution gas refer to reburner 23 generate hydrogen after pressure swing adsorption hydrogen production, pressure-variable adsorption link is resolved the one kind got off
Gas, main component are carbon monoxide, the gases such as hydrogen sulfide.
Steam reformer flue gas heat recovery and utilization method is carried out based on above system, is included the following steps：
Unstripped gas and product circulating hydrogen mixing desulfurization, introduce after desulfurization first strand of steam enter the first pre reformer into
Expect superheater 14, the second pre reformer feed superheater 17, pre reformer 18, generates H2、CO、CH4, then introduce second burst of steaming
Vapour enters the first reburner feed superheater 21, the second reburner feed superheater 22 and reburner 23, and the reaction was continued generates H2、
CO、CH4, cooling enters shift-converter, CO and H2O the reaction was continued generate H2、CO2, continue to be cooled to room temperature enter PSA into
Row H2Purification, H2As giving client outside product, the low pressure resolution gas parsed from PSA is as low-pressure fuel into reburner 23
Burning provides heat to reburner 23, and the second combustion-supporting air preheater 12 passes through tune for realizing the heat exchange of flue gas and air
Save the positive line control valve 11 of combustion air, combustion air bypass valve 13, pre reformer charging bypass valve 15, pre reformer
Positive line control valve 16, reburner charging bypass valve 19, reburner is fed to feed positive 20 aperture of line control valve and make full use of cigarette
The temperature of road gas increases the steam amount of sending outside more to give 5 evaporated vapor of drum, and the air quantity of reburner 23 is controlled by blast regulator 1
System, the hearth vacuum control of reburner 23 is in -20mmH2O, reburner heat are provided by high pressure fuel, low pressure resolution gas.
When 24 aperture of low-pressure fuel heat release torch regulating valve is 0%, the control of high pressure fuel amount is steamed in minimum 80NM/H, high pressure
The vapour amount of sending outside maintains 3500NM/H, and than not using more 1000NM/H before technical scheme of the present invention, here it is flue gases
Heat recovery is to increase the operating method of steam.
By adjusting blast regulator 1, Boiler pressure control in 14400NM/H, the hearth vacuum control of reburner 23-
20mmH2O adjusts the positive line control valve 11 of combustion air, combustion air bypass valve 13 controls the amount of flue gas to ensure cigarette
Road gas heat exchanger 7 is high into 5 temperature of drum, such producing steam multiple spot.Adjust pre reformer charging bypass valve 15, pre reformer
Positive line control valve 16, reburner charging bypass valve 19, reburner is fed to feed positive line control valve 20 and ensure unstripped gas into vapour
5 amounts of packet are more, and heat is also more, and producing steam is just more, and unstripped gas increases fuel quantity into 23 temperature of reburner with regard to low, increases low pressure
Tolerance is parsed into reburner 23,24 aperture of low-pressure fuel heat release torch regulating valve keeps 0%, and high pressure fuel is into reburner flowmeter
26 maintain 80NM/H.
Implementation is：
1, by turning down positive 11 aperture of line control valve of combustion air to 20%, 13 aperture of combustion air bypass valve is opened extremely
100%, cold air only has 20% to enter the second combustion-supporting air preheater 12 and flue gas heat exchange, largely passes through combustion air
Bypass valve 13, the relatively low air of relative temperature enters to burn into reburner, to ensure that conversion outlet of still reaches setting temperature
Degree provides heat it is necessary to increase fuel quantity to reburner, and the automatic low pressure parsing tolerance that increases ensures that stove goes out into reburner burning
Mouth temperature.7 relative temperature of flue gas heat-exchanger is just high, just high to 5 temperature of drum, to which output steam is with regard to multiple spot.
2, continue to adjust：Big pre reformer charging 15 aperture of bypass valve is opened, pre reformer feeds positive line control valve 16
100% aperture is maintained, goes the amount of drum 5 more in this way, heat is also more, and such producing steam is also more.
3, continue to adjust：Big reburner charging 19 aperture of bypass valve is opened, reburner feeds positive line control valve 20 and maintains
100% aperture goes the amount of drum 5 more in this way, and heat is also more, and such producing steam is also more.Unstripped gas own temperature is just fallen
Come, it is also low into conversion furnace temperature, in order to ensure to convert heater outlet temperature, it is increased by fuel, low pressure resolution gas is continued growing and goes to turn
Change stove amount, until low pressure resolution gas all into reburner burning, 24 aperture 0% of low-pressure fuel heat release torch regulating valve, and
High pressure fuel maintains minimum flow 80NM/H, and blast regulator 1 maintains 14400NM/H, the hearth vacuum control of reburner 23
In -20mmH2O, 8 aperture of such high pressure steam control valve increase, send quantity of steam outside and maintain 3500NM/H.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be the present invention's
Within protection domain.
Claims (10)
1. a kind of steam reformer flue gas heat recycling system, which is characterized in that
Include the first pre reformer feed superheater (14), the second pre reformer feed superheater being connected by pipeline sequence
(17), pre reformer (18), the first reburner feed superheater (21), the second reburner feed superheater (22) and reburner
(23),
The first pre reformer feed superheater (14) is used for receiving unstripped gas or the hydrogen of cycle, the reburner (23)
In reaction hydrogen,
It is drawn on pipeline between the first pre reformer feed superheater (14) and the second pre reformer feed superheater (17)
Pre reformer charging bypass, pre reformer charging bypass converge into the first pre reformer feed superheater after drum (5)
(14) on the pipeline between the second pre reformer feed superheater (17),
Conversion is drawn on pipeline between the first reburner feed superheater (21) and the second reburner feed superheater (22)
Stove charging bypass, reburner charging bypass converge into the first reburner feed superheater (21) and second after drum (5)
On pipeline between reburner feed superheater (22),
The drum (5) is also associated with flue gas air inlet pipe and high steam snorkel, and the flue gas air inlet pipe is for receiving
Flue gas from reburner (23), the high steam snorkel is for sending the high steam that drum (5) generates outside, institute
It states drum (5) and is additionally provided with the flue gas circulating line recycled for flue gas, the flue gas circulating line is equipped with flue gas
Heat exchanger (7),
The reburner (23) is connected with combustion air supply line, is provided with for combustion-supporting on combustion air supply line
The air preheater that air is preheated,
The reburner (23) is also associated with high-pressure fuel supply pipeline and low pressure resolution gas supply line.
2. a kind of steam reformer flue gas heat recycling system according to claim 1, which is characterized in that described
Air preheater includes the first combustion-supporting air preheater (6) and the second combustion air being arranged on combustion air supply line
Preheater (12), being arranged on the combustion air supply line can make combustion air not by the first combustion-supporting air preheater
(6) combustion air bypass, being arranged on the combustion air supply line can make combustion air not by the second combustion-supporting sky
The combustion air of air preheater (12) bypasses.
3. a kind of steam reformer flue gas heat recycling system according to claim 2, which is characterized in that
To the second combustion air at the node of combustion air bypass and combustion air supply line before two combustion-supporting air preheaters (12)
It is provided with the positive line control valve of combustion air (11) on pipeline between preheater (12), is arranged in the combustion air bypass and helps
Fire air bypass regulating valve (13).
4. a kind of steam reformer flue gas heat recycling system according to claim 2, which is characterized in that in institute
It states and is provided with air blower (2) and blast regulator (1) on combustion air supply line before the first combustion-supporting air preheater (6),
First combustion-supporting air preheater (6) is also connected with gas exhaust piping, and air-introduced machine (4) is provided on the gas exhaust piping and is adjusted
Pressure valve (3).
5. a kind of steam reformer flue gas heat recycling system according to claim 1, which is characterized in that first
Pipeline between pre reformer feed superheater (14) and the second pre reformer feed superheater (17) be equipped with pre reformer into
Expect that positive line control valve (16), the pre reformer charging bypass are equipped with pre reformer charging bypass valve (15).
6. a kind of steam reformer flue gas heat recycling system according to claim 1, which is characterized in that first
Pipeline between reburner feed superheater (21) and the second reburner feed superheater (22) is equipped with reburner and feeds main track
Regulating valve (20), the reburner charging bypass are equipped with reburner charging bypass valve (19).
7. a kind of steam reformer flue gas heat recycling system according to claim 1, which is characterized in that described
It is sequentially set with steam superheater (10), high pressure steam control valve (8) and high steam on high steam snorkel and sends flow outside
It counts (9).
8. a kind of steam reformer flue gas heat recycling system according to claim 1, which is characterized in that described
High-pressure fuel supply pipeline is equipped with high pressure fuel into reburner flow control valve (25) and high pressure fuel into reburner flowmeter
(26)。
9. a kind of steam reformer flue gas heat recycling system according to claim 1, which is characterized in that described
Low pressure resolution gas supply line is equipped with low-pressure fuel heat release torch regulating valve (24).
10. one kind carrying out steam reformer flue gas heat recovery and utilization side based on any one of the claim 1-9 systems
Method, which is characterized in that include the following steps：
Unstripped gas and product circulating hydrogen mixing desulfurization introduce first strand of steam after desulfurization and were fed into the first pre reformer
Hot device (14), the second pre reformer feed superheater (17), pre reformer (18) generate H2、CO、CH4,
Then introduce second strand of steam enter the first reburner feed superheater (21), the second reburner feed superheater (22) and
Reburner (23), the reaction was continued generates H2、CO、CH4,
Cooling enters shift-converter, CO and H2O the reaction was continued generate H2、CO2, continue to be cooled to room temperature and enter PSA carrying out H2
Purification, H2Client is given outside as product,
The low pressure resolution gas parsed from PSA burns as low-pressure fuel into reburner (23), and heat is provided to reburner (23)
Amount,
Second combustion-supporting air preheater (12) for realizing flue gas and air heat exchange,
By adjusting the positive line control valve of combustion air (11), combustion air bypass valve (13), pre reformer charging bypass tune
Save valve (15), pre reformer feeds positive line control valve (16), reburner charging bypass valve (19), reburner feed main track tune
Section valve (20) aperture makes full use of the temperature of flue gas, to give drum (5) evaporated vapor, increases the steam amount of sending outside more,
The air quantity of reburner (23) is controlled by blast regulator (1), and the hearth vacuum control of reburner (23) is in -20mmH2O turns
Change stove heat to be provided by high pressure fuel, low pressure resolution gas.
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| CN201810241846.2A CN108275653A (en) | 2018-03-22 | 2018-03-22 | A kind of steam reformer flue gas heat recycling system and method |
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| CN201810241846.2A CN108275653A (en) | 2018-03-22 | 2018-03-22 | A kind of steam reformer flue gas heat recycling system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021031894A1 (en) * | 2019-08-20 | 2021-02-25 | 四川亚联高科技股份有限公司 | Integrated small to medium-sized natural gas steam reforming reactor, and reforming reaction process |
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| WO2021031894A1 (en) * | 2019-08-20 | 2021-02-25 | 四川亚联高科技股份有限公司 | Integrated small to medium-sized natural gas steam reforming reactor, and reforming reaction process |
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