CN106753642A - A kind of energy comprehensive utilization system in high-pressure washing Methane decarbonization technique - Google Patents
A kind of energy comprehensive utilization system in high-pressure washing Methane decarbonization technique Download PDFInfo
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- CN106753642A CN106753642A CN201611196803.4A CN201611196803A CN106753642A CN 106753642 A CN106753642 A CN 106753642A CN 201611196803 A CN201611196803 A CN 201611196803A CN 106753642 A CN106753642 A CN 106753642A
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- China
- Prior art keywords
- flash tank
- carbon dioxide
- carbon
- absorption tower
- biogas
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/104—Carbon dioxide
-
- 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
- B01D53/1475—Removing carbon dioxide
-
- 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
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
- B01D53/26—Drying gases or vapours
-
- 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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to methane purification apparatus field, the energy comprehensive utilization system in a kind of high-pressure washing Methane decarbonization technique is particularly disclosed.Its absorption tower, primary flash tank, two-stage flash tank, desorber, carbon-dioxide gas compressor, carbon dioxide molecule sieves dehydration device, carbon dioxide rectifier unit, the upper end on wherein absorption tower is sequentially connected natural gas molecule sieve and natural gas compressor, between absorption tower and primary flash tank, increase a hydraulic turbine between primary flash tank and two-stage flash tank respectively for generating electricity, by biogas roots blower, Marsh gas compression machine, natural gas molecule is sieved, natural gas compressor, carbon-dioxide gas compressor, the recirculated water that carbon dioxide molecule sieve dehydration device is produced exchanges to water pump thermal source by water pump carries out heat exchange, energy is provided with for other equipment.The operation energy consumption of the synthetical recovery whole biogas engineering of reduction that the present invention passes through the waste heat overbottom pressure energy to high-pressure washing Methane decarbonization, so as to lift the economy of biogas engineering.
Description
（One）Technical field
The present invention relates to methane purification apparatus field, the energy synthesis profit in more particularly to a kind of high-pressure washing Methane decarbonization technique
Use system.
（Two）Background technology
The main component of biogas is methane and CO2, by removing the CO in biogas2The calorific value of biogas can be effectively improved so as to open up
Open up the range of application of biogas.
The method of conventional methane purification decarburization has：Pressure washing, organic amine absorb, PSA, the method such as UF membrane, existing
Technology be mainly reduce operating cost in terms of broken through.
From for the technique of decarburization, various methods can be by the CO in biogas2Removing reaches the mark of national natural gas
Standard, but the technical advance of various decarbonization process is mainly slave unit investment and operation energy consumption aspect to compare at present.High pressure
Washing Methane decarbonization is due to its safety and environmental protection, corrosion-free medium, system long-term operation performance reliability, the robust performance of technology controlling and process
Very big market proportion that is superior, being occupied in biogas engineering abroad, China promotes the technique due to starting in recent years, but single
It is pure realize angle from technique for, the isolated operation of each equipment ensure that the operation of the technique, but relative installation energy consumption
It is higher with operation energy consumption.
（Three）The content of the invention
Defect in order to make up prior art of the invention, there is provided a kind of to optimize the integrated operation realized during Methane decarbonization
Energy comprehensive utilization system in the high-pressure washing Methane decarbonization technique of energy consumption.
The present invention is achieved through the following technical solutions：
A kind of energy comprehensive utilization system in high-pressure washing Methane decarbonization technique, it is characterized in that, including absorption tower, primary flash
Tank, two-stage flash tank, desorber, carbon-dioxide gas compressor, carbon dioxide molecule sieve dehydration device, carbon dioxide rectifier unit,
The upper end on wherein absorption tower is sequentially connected natural gas molecule sieve and natural gas compressor, and the bottom on absorption tower connects through biogas and enters
Mouth is sequentially connected Marsh gas compression machine, desulfurizer and biogas roots blower, and the lower end on absorption tower connects primary flash by pipeline
The top of tank, sets first hydraulic turbine on its pipeline；The upper end of primary flash tank is connected to biogas porch by pipeline；One
The circulating water outlet of level flash tank lower end connects the water inlet on two-stage flash tank top by pipeline, and second is connected on its pipeline
The hydraulic turbine；The lower end of two-stage flash tank connects the top of desorber, and the bottom connection air inlet pipe of desorber, the lower end of desorber is logical
The top that circulating pump is connected to absorption tower is crossed, the upper end of desorber sets blow-down pipe, the gas of the upper end of the two-stage flash tank
Outlet is connected to carbon-dioxide gas compressor entrance, and carbon-dioxide gas compressor outlet is connected to carbon dioxide molecule sieve dehydration device and enters
Mouthful, the outlet of carbon dioxide molecule sieve dehydration device is connected to carbon dioxide rectifier unit, carbon dioxide rectifier unit top
Gas vent is connected to biogas porch by pipeline, and the bottom connection liquid carbon dioxide of carbon dioxide rectifier unit is exported,
The biogas roots blower, Marsh gas compression machine, natural gas molecule sieve, natural gas compressor, carbon-dioxide gas compressor, carbon dioxide
Molecular sieve dehydration device connects water resource heat pump by a water pump respectively.
The two-stage flash tank is vacuum flasher or atmospheric flashing tank.
The beneficial effects of the invention are as follows：
The present invention is by the dynamic equipment in the technique, such as biogas roots blower, Marsh gas compression machine, natual gas dehydrate unit, natural gas
Compressor, CO2Compressor, CO2The heat produced during the equipment operation of dehydration device is dropped by recirculated cooling water
Temperature, heat is temporarily stored in cooling circulating water, by cooling temperature of circulating water reduction so as to for moving by way of water resource heat pump
Equipment continuously runs, and the heat-exchange working medium that the heat of cooling circulating water passes through water resource heat pump in high-pressure washing technique, by again
Secondary heat exchange can obtain temperature hot water higher, so that for the operating unit with heat demand of other workshop sections of anaerobic fermentation,
Such as insulation and the desiccation of organic fertilizer process of anaerobic fermentation tank, so as to reduce the energy consumption of whole system.
In the present invention, in process recycled water step pressure reducing regenerative process, absorption tower and one-level during high-pressure washing
Between flash tank, the process recycled water between primary flash tank and two-stage flash tank is respectively provided with certain pressure difference, can be by water wheels
Machine is recovered energy, and the energy utilization mode of recovery can be coupled with the dynamic equipment such as water pump of others, reduce whole system
Operation energy consumption, or generated electricity by the hydraulic turbine, drive low power dynamic equipment.
The synthetical recovery whole biogas engineering of reduction that the present invention passes through the waste heat overbottom pressure energy to high-pressure washing Methane decarbonization
Operation energy consumption, so as to lift the economy of biogas engineering.
（Four）Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings：
Fig. 1 is attachment structure schematic diagram of the invention.
In figure, 1 desulfurizer, 2 biogas entrances, 3 absorption towers, 4 natural gas molecules sieve, 5 primary flash tanks, 6 two-stage flash
Tank, 7 carbon-dioxide gas compressors, 8 carbon dioxide molecules sieve dehydration device, 9 carbon dioxide rectifier units, 10 Marsh gas compression machines, 11
Biogas roots blower, 12 first hydraulic turbines, 13 air inlet pipe, the outlet of 14 liquid carbon dioxides, 15 desorbers, 16 blow-down pipes, 17 follow
Ring pump, 18 second hydraulic turbines, 19 natural gas compressors, 20 water pumps, 21 water resource heat pumps, 22 organic fertilizers are dried, 23 anaerobic fermentation tanks.
（Five）Specific embodiment
Accompanying drawing is specific embodiment of the invention.As shown in figure 1, the energy synthesis profit in this kind of high-pressure washing Methane decarbonization technique
With system, including absorption tower 3, primary flash tank 5, two-stage flash tank 6, desorber 15, carbon-dioxide gas compressor 7, carbon dioxide
Molecular sieve dehydration device 8, carbon dioxide rectifier unit 9, Marsh gas compression machine 10, biogas roots blower 11, wherein absorption tower 3 is upper
End is sequentially connected natural gas molecule and sieves 4 and natural gas compressor 19, and the bottom on absorption tower 3 is sequentially connected natural pond by biogas entrance 2
Air compressor 10, desulfurizer 1 and biogas roots blower 11, the lower end on absorption tower 3 connect the upper of primary flash tank 5 by pipeline
Portion, sets first hydraulic turbine 12 on the pipeline；The upper end of primary flash tank 5 is connected at biogas entrance 2 by pipeline, and one-level is dodged
The circulating water outlet of the lower end of steaming pot 5 connects the water inlet on the top of two-stage flash tank 6 by pipeline, and the second water wheels are set on the pipeline
Machine 18, the lower end of two-stage flash tank 6 connects the top of desorber 15, the bottom connection air inlet pipe 13 of desorber 15, desorber 15
Lower end the top on absorption tower 3 is connected to by circulating pump 17, the upper end of desorber 15 sets blow-down pipe 16, two-stage flash tank 6
The gas vent of upper end be connected to the entrance of carbon-dioxide gas compressor 7, the outlet of carbon-dioxide gas compressor 7 is connected to carbon dioxide point
The son sieve entrance of dehydration device 8, the outlet of carbon dioxide molecule sieve dehydration device 8 is connected to carbon dioxide rectifier unit 9, titanium dioxide
The bottom connection liquid carbon dioxide outlet 14 of carbon distillation unit 9；Biogas roots blower 11, Marsh gas compression machine 10, natural qi leel
Son sieve 4, natural gas compressor 19, carbon-dioxide gas compressor 7, carbon dioxide molecule sieve dehydration device 8 pass through a water pump respectively
20 connection water resource heat pumps 21；Water resource heat pump 21 can dry 22 and the offer heat of anaerobic fermentation tank 23 for organic fertilizer；Wherein, two grades
Flash tank 6 is vacuum flasher or atmospheric flashing tank, it is also possible to which the two is used in combination, if only setting atmospheric flashing tank, typically
Can be by biogas about 65% or so CO2Liquefaction is reclaimed, if increasing vacuum desorption, about 80% or so CO in biogas2Reclaim
Liquefaction, atmospheric flashing tank and Vacuum solutions cucurbitula can be separately provided, and can also merge into a device, disclosure satisfy that technique will
Ask.
The present invention is by the dynamic equipment in the technique, such as biogas roots blower, Marsh gas compression machine, natual gas dehydrate unit, day
Right air compressor, CO2Compressor, CO2The heat produced during the equipment operation of dehydration device is carried out by recirculated cooling water
Cooling, heat is temporarily stored in cooling circulating water, by cooling temperature of circulating water reduction so as to be used for by way of water resource heat pump
Dynamic equipment continuously runs, and the heat-exchange working medium that the heat of cooling circulating water passes through water resource heat pump in high-pressure washing technique, pass through
Heat exchange again can obtain temperature hot water higher, so that for the operation list with heat demand of other workshop sections of anaerobic fermentation
The insulation of unit, such as anaerobic fermentation tank and the desiccation of organic fertilizer process, so as to reduce the energy consumption of whole system.
In the present invention, in process recycled water step pressure reducing regenerative process, absorption tower and one-level during high-pressure washing
Between flash tank, the process recycled water between primary flash tank and two-stage flash tank is respectively provided with certain pressure difference, can be by water wheels
Machine is recovered energy, and the energy utilization mode of recovery can be coupled with the dynamic equipment such as water pump of others, reduce whole system
Operation energy consumption, or generated electricity by the hydraulic turbine, drive low power dynamic equipment.
The synthetical recovery whole biogas engineering of reduction that the present invention passes through the waste heat overbottom pressure energy to high-pressure washing Methane decarbonization
Operation energy consumption, so as to lift the economy of biogas engineering.
In addition to technical characteristic described in specification, remaining technical characteristic is technology known to those skilled in the art.
Claims (2)
1. the energy comprehensive utilization system in a kind of high-pressure washing Methane decarbonization technique, it is characterized in that, including absorption tower（3）, one
Level flash tank（4）, two-stage flash tank（6）, desorber（15）, carbon-dioxide gas compressor（7）, carbon dioxide molecule sieve dehydration device
（8）, carbon dioxide rectifier unit（9）, wherein absorption tower（3）Upper end be sequentially connected natural gas molecule sieve（4）And natural pressure
Contracting machine（19）, absorption tower（3）Bottom connect through biogas entrance（2）It is sequentially connected Marsh gas compression machine（10）, desulfurizer（1）
With biogas roots blower（11）, absorption tower（3）Lower end by pipeline connect primary flash tank（5）Top, on its pipeline
First hydraulic turbine is set（12）；Primary flash tank（5）Upper end biogas entrance is connected to by pipeline（2）Place；Primary flash tank
（5）The circulating water outlet of lower end connects two-stage flash tank by pipeline（6）The water inlet on top, connects the second water on its pipeline
Turbine（18）；Two-stage flash tank（6）Lower end connection desorber（15）Top, desorber（15）Bottom connection air inlet pipe
（13）, desorber（15）Lower end pass through circulating pump（17）It is connected to absorption tower（1）Top, desorber（15）Upper end set
Blow-down pipe（16）, the two-stage flash tank（6）The gas vent of upper end be connected to carbon-dioxide gas compressor（7）Entrance, dioxy
Change carbon compressor（7）Outlet is connected to carbon dioxide molecule sieve dehydration device（8）Entrance, carbon dioxide molecule sieve dehydration device
（8）Outlet be connected to carbon dioxide rectifier unit（9）, carbon dioxide rectifier unit（9）The gas vent on top passes through pipeline
It is connected to biogas entrance（2）Place, carbon dioxide rectifier unit（9）Bottom connection liquid carbon dioxide outlet（14）, the natural pond
Gas roots blower（11）, Marsh gas compression machine（10）, natural gas molecule sieve（4）, natural gas compressor（19）, carbon-dioxide gas compressor
（7）, carbon dioxide molecule sieve dehydration device（8）Pass through a water pump respectively（20）Connection water resource heat pump（21）.
2. high-pressure washing methane purification carbon dioxide in process recovery system according to claim 1, it is characterized in that, it is described
Two-stage flash tank（6）It is vacuum flasher or atmospheric flashing tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611196803.4A CN106753642A (en) | 2016-12-22 | 2016-12-22 | A kind of energy comprehensive utilization system in high-pressure washing Methane decarbonization technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611196803.4A CN106753642A (en) | 2016-12-22 | 2016-12-22 | A kind of energy comprehensive utilization system in high-pressure washing Methane decarbonization technique |
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| CN106753642A true CN106753642A (en) | 2017-05-31 |
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|---|---|---|---|---|
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