CN208038241U - A kind of biogas hydrogen manufacturing circulatory system of PTA sewage disposals - Google Patents
A kind of biogas hydrogen manufacturing circulatory system of PTA sewage disposals Download PDFInfo
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- CN208038241U CN208038241U CN201721902657.2U CN201721902657U CN208038241U CN 208038241 U CN208038241 U CN 208038241U CN 201721902657 U CN201721902657 U CN 201721902657U CN 208038241 U CN208038241 U CN 208038241U
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- 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
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Abstract
The utility model provides a kind of biogas hydrogen manufacturing circulatory system of PTA sewage disposals, including：PTA devices, settling tank, anaerobic baffled reactor, sedimentation basin, collecting methane tank, desulfurization adsorbent equipment, nitrogen oxygen removal device, cracking reactor, caustic scrubber I, gas-liquid separator, pressure-swing absorption apparatus, vapor heat exchanger, caustic scrubber II, desalination water wash column I and desalination water wash column II.The utility model changes sewage treatment unit in traditional handicraft, sewage in PTA device production processes is generated into biogas after biochemical treatment, methane in extraction biogas is converted into hydrogen, the hydrogen of the hydrogen and gas conversion of releasing, obtains the hydrogen of high-purity by pressure-variable adsorption together, is reacted for PTA device of refining, without outsourcing raw material and the energy, PTA device operating costs are reduced, the cycling and reutilization of PTA device internal resources is realized, achieves energy-saving and emission reduction purposes.
Description
Technical field
The utility model is related to PTA circulator fields, and in particular to a kind of biogas hydrogen manufacturing cyclic system of PTA sewage disposals
System.
Background technology
Terephthalic acid (TPA) (PTA) is important one of large Organic Ingredients, and 90% PTA is poly- to benzene for producing in the world
Naphthalate (PET) is widely used in the productions such as fiber terylene, polyester film, plasticizer, pesticide and dyestuff neck
Domain.While producing and application PTA, the PTA sewage of a large amount of high concentration is will produce, and the pollutant in PTA sewage is more
For aromatic compound, concentration is high, belongs to the sewage of difficult for biological degradation, intractability is big.General PTA sewage disposal devices,
A large amount of biogas will be will produce after biochemical wastewater treatment, these biogas are mainly used for pot in current domestic PTA devices
The fuel or combustion power generation of stove, tail-gas combustion stove.
Chinese patent application CN 203269722 discloses a kind of PTA sewage disposal systems, to overcome the prior art to handle
Time is long, takes up a large area the shortcomings of high with operating cost comprising acid precipitation pond, internal-circulation anaerobic reactor, first are sunk
The advantages of drop tank, biological fluidized bed aerobic reactor, the second settling tank and Airfloat filtering pond, this application is to improve PTA sewage disposals
It efficiency and reduces production mud, reduce floor space etc., but the disadvantage is that the biogas that biochemical treatment generates is not effectively treated, cause
The wasting of resources and environmental pollution.
Chinese patent application CN103130184A discloses a kind of PTA device of refining unit and releases the side of gas comprehensive utilization
Method, the unstripped gas of this method are released gas from PTA device of refining unit, and unstripped gas is by after exchanging heat and cooling down, dropping it
Pressure, wash cooling, remove organic acid and liquid water therein, obtain high-quality hydrogen after pressure-variable adsorption, be recycled.It should
The advantages of application is the processing method for changing hydrofinishing unit bleed off gas in traditional handicraft, when unstripped gas is cooled down by exchanging heat
Afterwards, extra heat is recycled, then it is depressured, wash cooling, organic acid and water therein is removed, avoids organic acid pair
The toxic effect effect of adsorbent used when pressure-variable adsorption, then high-quality hydrogen is obtained by pressure-variable adsorption, to carry out recycling profit
With reducing the consumption of hydrogen, while decreasing the waste of resource, but the disadvantage is that unstripped gas source is single, PTA refining reaction masters
If carrying out catalysis reaction using hydrogen, and the hydrogen of invention recycling is far smaller than the amount needed for refining reaction, also needs separately to set
Device for producing hydrogen.
Available data introduction, at present in synthesis ammonia industry, generally use natural gas hydrogen preparation, hydrogen manufacturing cost is about 0.6 yuan/
Nm3.Biogas after PTA sewage disposals is closer to the raw natural gas component in natural gas hydrogen preparation technique, and ingredient mainly has
CH4、CO2, water, aqueous vapor and H2S (a small amount of), wherein methane content >=65% (percent by volume), by the CO in biogas2, water, water
Gas and H2After impurity detaches, methane concentration can reach 90% or more even higher S, reach the index of natural gas, if
This 90% or more methane and water vapour can be converted to H under high temperature and catalyst action2And CO, and extremely by hydrogen purification
The hydrogen of required concentration recycles and produces subtractive process in PTA repeatedly, and not only solving general PTA devices itself cannot
The problem of hydrogen producing, need another organizational system hydrogen production device, prior art can also be simplified, effectively reduce production cost.
Utility model content
To solve the above problems, the utility model provides a kind of biogas of PTA sewage disposals at low cost, easy to operate
The sewage discharged in PTA device production processes by generating biogas after biochemical treatment, is extracted natural pond by the hydrogen manufacturing circulatory system, the system
Methane in gas is converted into hydrogen, the hydrogen of the hydrogen and the gas conversion of releasing of PTA device leakage ports discharge, by pressure-variable adsorption
The hydrogen of high-purity is obtained, is reacted for PTA device of refining, realizes the cycling and reutilization of PTA device internal resources.
Technical solutions of the utility model are as follows：The biogas hydrogen manufacturing circulatory system of PTA sewage disposals, including PTA devices, sedimentation
Tank, anaerobic baffled reactor, sedimentation basin, collecting methane tank, desulfurization adsorbent equipment, nitrogen oxygen removal device, cracking reactor, alkali
Scrubbing tower I, gas-liquid separator, pressure-swing absorption apparatus, vapor heat exchanger, caustic scrubber II, desalination water wash column I and desalination washing
Wash tower II；
PTA device Sewage outlets are connect with settling tank；Settling tank is connect with anaerobic baffled reactor；The anaerobism
The exhaust outlet of baffled reactor is connect with collecting methane tank, and sewage draining exit is connect with sedimentation basin；The collecting methane tank and desulfurization
Adsorbent equipment connects, and the desulfurization adsorbent equipment is connect with nitrogen oxygen removal device portal, and the nitrogen oxygen removal device is anti-with cracking
Device is answered to connect, the cracking reactor is connect with I bottom inlet of caustic scrubber, and outlet and the desalination of the caustic scrubber I are washed
The connection of tower I is washed, the outlet of desalination water wash column I is connect with the entrance of gas-liquid separator, the outlet of the gas-liquid separator and transformation
Adsorbent equipment connects；The leakage port of PTA devices is connect with vapor heat exchanger, the vapor heat exchanger and II bottom of caustic scrubber
Entrance connect, the caustic scrubber II outlet connect with II entrance of desalination water wash column, the desalination water wash column II and
Gas-liquid separator connects.
Preferably, pressure-swing absorption apparatus includes at least two adsorption towers in parallel, at least two surge tanks in parallel, vacuum
Pump and program-controlled valve, adsorption tower and surge tank are connected on pipeline, and surge tank outlet is connect with PTA devices.
Preferably, the PTA devices are thick PTA refining plants.
Preferably, the anaerobic baffled reactor is cylinder, corresponding installation 10~20 pieces of baffle plates and 10 in inside
~20 pieces of overflow plates, the PTA production sewage treatment device anaerobic sludges of inside inoculation volume fraction 15~35%.
Preferably, the desulfurization adsorbent equipment is by two adsorption tower groups in parallel at equipped with desulfurization inside adsorption tower
Agent.
Preferably, the nitrogen oxygen removal device is pressure-swing absorber.
The utility model has the beneficial effects that：The utility model changes sewage treatment unit in traditional handicraft, and PTA is filled
Set the sewage in production process and generate biogas after biochemical treatment, the methane extracted in biogas is converted into hydrogen, the hydrogen with let out
The hydrogen of deflation conversion, obtains the hydrogen of high-purity by pressure-variable adsorption together, is reacted for PTA device of refining, is not necessarily to outsourcing
Raw material and the energy reduce PTA device operating costs, realize the cycling and reutilization of PTA device internal resources, reach energy-saving and emission-reduction
Purpose.
Description of the drawings
Fig. 1 is the structural schematic diagram of Tthe utility model system；
Fig. 2 is the structural schematic diagram of pressure-swing absorption apparatus.
In figure：1, PTA devices, 2, settling tank, 3, anaerobic baffled reactor, 4, sedimentation basin, 5, collecting methane tank, 6, de-
Sulphur adsorbent equipment, 7, nitrogen oxygen removal device, 8, cracking reactor, 9, caustic scrubber I, 10, gas-liquid separator, 11, pressure-variable adsorption
Device, 12, vapor heat exchanger, 13, caustic scrubber II, 14, desalination water wash column I, 15, desalination water wash column II, 111, absorption
Tower, 112, surge tank, 113, vacuum pump, 114, program-controlled valve.
Specific implementation mode
The utility model is described further with reference to the accompanying drawings and detailed description.
As shown in Figure 1, the biogas hydrogen manufacturing circulatory system of PTA sewage disposals includes：It is PTA devices 1, settling tank 2, anaerobic baffled
Plate reactor 3, sedimentation basin 4, collecting methane tank 5, desulfurization adsorbent equipment 6, nitrogen oxygen removal device 7, cracking reactor 8, neutralizing treatment
Tower I 9, gas-liquid separator 10, pressure-swing absorption apparatus 11, vapor heat exchanger 12, caustic scrubber II 13, desalination water wash column I 14 and
Desalination water wash column II 15；The pressure-swing absorption apparatus 11 includes adsorption tower 111, surge tank 112, vacuum pump 113 and program-controlled
Valve 114；
The PTA devices 1 are thick PTA refining plants, and settling tank 2 is connect with PTA devices 1 by pipeline, and settling tank 2 goes out
Mouth is connect with 3 entrance of anaerobic baffled reactor, and the anaerobic baffled reactor 3 is cylinder, and inside is corresponding to install 10
The PTA production sewage treatment devices of~20 pieces of baffle plates and 10~20 pieces of overflow plates, inside inoculation volume fraction 15~35% are detested
Oxygen sludge.The exhaust outlet of the anaerobic baffled reactor 3 is connect with 5 entrance of collecting methane tank, and sewage draining exit connects with sedimentation basin 4
It connects, the outlet of collecting methane tank 5 is connect with 6 entrance of desulfurization adsorbent equipment, and the desulfurization adsorbent equipment 6 is by two parallel connections
Adsorption tower group at being equipped with desulfurizing agent inside, adsorption tower.The outlet of the desulfurization adsorbent equipment 6 and 7 entrance of nitrogen oxygen removal device
Connection, the nitrogen oxygen removal device 7 are pressure-swing absorber, the entrance of nitrogen oxygen removal device 7 outlet and cracking reactor 8
Connection, the outlet of the cracking reactor 8 are connect with I 9 bottom inlet of caustic scrubber, the outlet and desalination of the caustic scrubber I 9
Water wash column I 14 connects, and the outlet of desalination water wash column I 14 is connect with gas-liquid separator 10, gas-liquid separator 10 by pipeline and
Adsorption tower 111 connects, and adsorption tower 111 is that five parallel connections are located on pipeline, and adsorption tower 111 is connect with surge tank 112, surge tank
112 are located at for two parallel connections on pipeline, and 112 export pipeline of surge tank is equipped with program-controlled valve 114, surge tank 112 and PTA devices
1 connects, and vacuum pump is additionally provided on the pipeline between adsorption tower 111 and surge tank 112；The leakage port of PTA devices 1 is changed with steam
12 entrance of hot device connects, and the vapor heat exchanger 12 outlet is connect with II 13 bottom inlet of caustic scrubber, the neutralizing treatment
The outlet of tower II 13 is connect with II 15 entrance of desalination water wash column, the desalination water wash column II 15 outlet and gas-liquid separator 10
Entrance connects.
The circulatory system includes two cyclic processes, is that biogas hydrogen manufacturing recycles and lets out deflation cycles respectively, is specifically circulated throughout
Journey is as follows：
1. biogas hydrogen manufacturing recycles
The sewage that PTA devices 1 are generated is pumped into settling tank 2 and is separated by solid-liquid separation, and the terephthalic acid (TPA) of precipitation is recycled to
PTA devices 1, PTA sewage are sent into anaerobic baffled reactor 3, stop 9~10 hours, and PTA sewage is kept off in reactor along baffling
Plate multiple baffling movement up and down, sewage passes sequentially through areas at different levels until outlet, in the process the organic substance in sewage with detest
Oxygen activity sludge comes into full contact with, and produces sour decomposing organic matter by acid-producing bacteria, higher ph can be kept in anaerobic baffled reactor 3
Meet methanogen growth conditions, generates more biogas.The biogas of generation enters collecting methane tank 5, then passes to desulfurization suction
Adsorption device 6, desulfurization adsorbent equipment 6 are composed in parallel by two adsorption towers so that desulfurizing agent is replaced in one of adsorption tower regeneration
When, another adsorption tower can proceed with work, and 15%~40% desulfurizing agent is added by gas flow for adsorption layer, and desulfurizing agent is
Manganese oxide desulfurizing agent, gas is passed through nitrogen oxygen removal device 7 after desulfurization, and nitrogen oxygen removal device 7 is by two adsorption towers by parallel connection
Mode forms, and continues separating-purifying to the methane in mixed gas in the way of pressure-variable adsorption, is loaded in adsorption tower
Active charcoal, methane is adsorbed under the action of adsorbent as adsorbate, and makes high-purity methane from suction using desorption process
The stripping gas output end of attached tower bottom exports, and carries out catalysis reaction subsequently into cracking reactor 8, is catalyzed the reaction pressure of reaction
For 0~1.2MPa, reaction temperature is 300~1300 DEG C, and catalysts are preferably Fe and Ni, and carrier is preferably activated carbon,
It converts methane to hydrogen and CO under high temperature and catalysts conditions, above-mentioned gas is subjected to hydrogen purification, is passed through in caustic scrubber I 9
Over-pressed force regulating valve is depressurized to 12kgf/cm2, the gaseous mixture of hydrogen and CO after decompression enters I 9 bottom of caustic scrubber, and gas exists
In uphill process, and top-down 5%NaOH counter current contactings, acid in gaseous mixture is by alkali neutralization, while high temperature
Gas is cooled down by the NaOH solution of low temperature, and gaseous mixture leaves caustic scrubber I 9 from top of tower, and temperature can be reduced to 85 DEG C.It washes
Gaseous mixture after washing can be introduced into desalination water wash column I 14, washed to unstrpped gas using desalted water, can continue handle
Unstripped gas temperature is reduced to 50 DEG C.On-condensible gas after washing is mainly that the mixed gas of hydrogen and vapor is washed by front
It washs, cool down, using gas-liquid separator 10, moisture content therein is separated, on-condensible gas is directly entered adsorption tower 111,
In five adsorption towers 111, wherein an adsorption tower 111 is in charging adsorbed state always, remaining four adsorption tower 111 is in again
Raw different phase, technical process by absorption, three times drop pressure, inverse put, vacuumize, boost pressure and product are final three times
Wherein pressure is carried out boosting composition by pressure surge tank 112 three times, the alternately above absorption of five adsorption towers 111, again
The continuous Separation & Purification of hydrogen can be realized in raw operation, and finally, the hydrogen of purification is recycled in PTA devices 1, participate in PTA essences
System reaction.
2. letting out deflation cycles
The gas of releasing being discharged from 1 leakage port of PTA devices is cooled down by vapor heat exchanger 12, enters alkali cleaning after cooling, decompression
II 13 bottom of tower is washed, gas is in uphill process, with top-down 5%NaOH counter current contactings, the acid released in gas
By alkali neutralization, while the gas of high temperature is cooled down by the NaOH solution of low temperature, and the gas of releasing after alkali cleaning leaves from top of tower, temperature
85 DEG C can be reduced to, gas enters desalination water wash column II 15 later, is this time using desalted water to the gas of releasing after alkali cleaning
It is washed, while gas temperature being continued to be reduced to 55 DEG C, due to the continuously decreasing with its temperature of the water content in gas,
Vapor therein gradually condenses out, using gas-liquid separator 10 after the air cooling to room temperature of releasing after Demineralized Water Production,
Moisture content therein is separated, battery limit (BL) is discharged by the tapping valve of 10 bottom of gas-liquid separator in the moisture content after separation, and condenses
On-condensible gas afterwards, the mainly gas of hydrogen can meet the requirement of pressure-variable adsorption recycling wherein hydrogen, be directly sent to transformation
Adsorbent equipment 11 is recycled hydrogen therein, in five adsorption towers 111, wherein an adsorption tower 111 is in charging always
Adsorbed state, remaining four adsorption tower 111 are in regenerated different phase, and technical process is by absorption, three times drop pressure, inverse
Put, vacuumize, three times boost pressure and product finally boost composition wherein three times pressure by pressure surge tank 112 carry out, five
The continuous Separation & Purification of hydrogen, finally, purification can be realized in the alternately above absorption of platform adsorption tower 111, regenerative operation
Hydrogen be recycled in PTA devices 1, participate in PTA refining reactions.
The preferable specific implementation mode of the above, only the invention, but the protection domain of the invention is not
It is confined to this, any one skilled in the art is in the technical scope that the invention discloses, according to the present invention
The technical solution of creation and its innovation and creation design are subject to equivalent substitution or change, should all cover the protection model in the invention
Within enclosing.
Claims (6)
1. a kind of biogas hydrogen manufacturing circulatory system of PTA sewage disposals, it is characterised in that：PTA devices (1) are connect with settling tank (2)；
Settling tank (2) is connect with anaerobic baffled reactor (3)；The exhaust outlet of the anaerobic baffled reactor (3) is received with biogas
Collect tank (5) to connect, sewage draining exit is connect with sedimentation basin (4)；The collecting methane tank (5) connect with desulfurization adsorbent equipment (6), described
Desulfurization adsorbent equipment (6) is connect with nitrogen oxygen removal device (7) entrance, and the nitrogen oxygen removal device (7) connects with cracking reactor (8)
It connects, the cracking reactor (8) connect with caustic scrubber I (9) bottom inlet, the outlet of the caustic scrubber I (9) and desalted water
Scrubbing tower I (14) connects, and desalination water wash column I (14) outlet is connect with the entrance of gas-liquid separator (10), the gas-liquid separation
The outlet of device (10) is connect with pressure-swing absorption apparatus (11)；The leakage port of PTA devices (1) is connect with vapor heat exchanger (12), institute
The vapor heat exchanger (12) stated is connect with caustic scrubber II (13) bottom inlet, the caustic scrubber II (13) outlet and desalination
Water wash column II (15) entrance connects, and the desalination water wash column II (15) is connect with gas-liquid separator (10).
2. the biogas hydrogen manufacturing circulatory system of PTA sewage disposals according to claim 1, it is characterised in that：Pressure-variable adsorption fills
Set the adsorption tower (111), surge tank (112), vacuum pump (113) and program-controlled valve (114) in parallel that (11) include in parallel, absorption
Tower (111) and surge tank (112) are connected on pipeline, and the surge tank (112) outlet is connect with PTA devices (1).
3. the biogas hydrogen manufacturing circulatory system of PTA sewage disposals according to claim 1, it is characterised in that：The PTA dresses
It is thick PTA refining plants to set (1).
4. the biogas hydrogen manufacturing circulatory system of PTA sewage disposals according to claim 1, it is characterised in that：The anaerobism
Baffled reactor (3) is cylinder, inside 10~20 pieces of baffle plates of corresponding installation and 10~20 pieces of overflow plates, internal inoculum
The PTA production sewage treatment device anaerobic sludges of fraction 15~35%.
5. the biogas hydrogen manufacturing circulatory system of PTA sewage disposals according to claim 1, it is characterised in that：The desulfurization
Adsorbent equipment (6) is by two adsorption tower groups in parallel at equipped with desulfurizing agent inside adsorption tower.
6. the biogas hydrogen manufacturing circulatory system of PTA sewage disposals according to claim 1, it is characterised in that：The nitrogen oxygen
Removing means (7) is pressure-swing absorber.
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| CN201721902657.2U CN208038241U (en) | 2017-12-29 | 2017-12-29 | A kind of biogas hydrogen manufacturing circulatory system of PTA sewage disposals |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107986578A (en) * | 2017-12-29 | 2018-05-04 | 逸盛大化石化有限公司 | The biogas hydrogen manufacturing circulatory system and technique of a kind of PTA sewage disposals |
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- 2017-12-29 CN CN201721902657.2U patent/CN208038241U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107986578A (en) * | 2017-12-29 | 2018-05-04 | 逸盛大化石化有限公司 | The biogas hydrogen manufacturing circulatory system and technique of a kind of PTA sewage disposals |
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