CN105910389B - Siloxanes removing means in a kind of biogas - Google Patents
Siloxanes removing means in a kind of biogas Download PDFInfo
- Publication number
- CN105910389B CN105910389B CN201610271036.2A CN201610271036A CN105910389B CN 105910389 B CN105910389 B CN 105910389B CN 201610271036 A CN201610271036 A CN 201610271036A CN 105910389 B CN105910389 B CN 105910389B
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- Prior art keywords
- biogas
- refrigerating medium
- siloxanes
- cold
- heat exchanger
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- -1 Siloxanes Chemical class 0.000 title claims abstract description 68
- 238000003860 storage Methods 0.000 claims abstract description 70
- 239000002028 Biomass Substances 0.000 claims abstract description 15
- 230000001351 cycling effect Effects 0.000 claims abstract description 15
- 239000003507 refrigerant Substances 0.000 claims description 45
- 238000001816 cooling Methods 0.000 claims description 42
- 230000008676 import Effects 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 36
- 238000001704 evaporation Methods 0.000 claims description 25
- 230000008020 evaporation Effects 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 230000000694 effects Effects 0.000 description 15
- 238000012546 transfer Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 238000005057 refrigeration Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000010257 thawing Methods 0.000 description 8
- 239000012535 impurity Substances 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/08—Separating gaseous impurities from gases or gaseous mixtures or from liquefied gases or liquefied gaseous mixtures
-
- 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
-
- 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
- F25B41/00—Fluid-circulation arrangements
-
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- 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
- C10L2200/00—Components of fuel compositions
- C10L2200/04—Organic compounds
- C10L2200/0461—Fractions defined by their origin
- C10L2200/0469—Renewables or materials of biological origin
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses siloxanes removing means in a kind of biogas, including refrigerating cycle unit, refrigerating medium cycling element and biogas siloxanes removal unit；Be arranged cold-storage tank be used for refrigerating medium cold-storage, two removing siloxanes heat exchangers work alternatively, incoming flow biomass gas exchanged heat with biogas after refrigerating medium and removing siloxanes after biogas be pre-chilled.The present invention can adapt to different operating conditions, be suitble in actual operation for removing the type siloxane gas in biogas, it is ensured that biogas is able to efficient application.
Description
Technical field
The invention belongs to biomass gas ingredient separation removal field, it is related to impurity removal in a kind of flammable biomass gas
Device, for removing the impurity such as siloxanes and moisture in flammable biomass gas.
Background technique
The main component of the biomass gas such as rubbish landfill gas, biogas and oil field gas is methane, is a kind of renewable
The energy.Methane is a kind of greenhouse gases, and the greenhouse effects generated are about 21 times of carbon dioxide, at the same pure methane have it is very high
Calorific value is 35.87MJ/m3；Biogas is used directly for gas turbine through simple purified treatment and combustion in IC engine generates electricity.
Contain a kind of micro substance --- siloxanes in biogas, when burning, will affect the dynamic balancing of gas turbine,
Internal combustion engine inner surface can generate silicon dioxide layer, shorten the service life of engine, and be forced to improve replacement cylinder head and spark
The frequency of plug reduces the safety of equipment.Water vapour is mostly to be saturated in biogas, and equipment can be made by being directly used in combustion power generation
At corrosion, combustion heat-exchange efficiency is reduced.
When temperature drops to -29 DEG C, the siloxanes removal efficiency in rubbish landfill gas can reach 80%~90%；And it fills
The impurity that moisture and part weight carbon hydrocarbon in gas etc. are dissolved in water can also remove.Biomass can effectively be removed using directly freezed method
Silicone material in gas, however, there are also following problems:
1. all there is larger for the component of the biomass gas such as biogas, landfill gas from different regions, temperature, pressure etc.
Difference, directly freezed gas are not buffered using cold-storage, and adaptability is poor, and the damage of heat exchanging device is also larger；
2. heat transfer rate decline even obstruction heat exchanger tube is caused at 0 DEG C hereinafter, water vapour can condense in heat exchanger frosts,
Defrosting need to be shut down so that operating interruptions.
U.S. patent Nos: siloxanes removes system (publication number: 2004/0045440 A1 of US), uses in the patent
With there are two the refrigeration systems of evaporator, achieve the purpose that continuous work by the way that two evaporators are used alternatingly；Defrost mode
It is defrosted using the evaporator that high temperature refrigerant flows through frosting by refrigerant supercooling.Through testing, which asks there are following
Topic:
1. intercouple effect and evaporator itself thermal inertia between precool heat exchanger device and evaporator, cause system from booting
About 35 minutes dynamic buffering phases are needed to stable operation, phase buffer endogenous substance gas cannot handle predetermined temperature；It cannot be real
Now to the removing of siloxanes.
2. precool heat exchanger device cold source is switched on breeze way early period, precool heat exchanger device cannot from treated biomass gas
Play the role of pre-cooling, high temperature and humidity biogas is directly entered evaporator cooling, causes frosting degree in evaporator to increase, shortens
Defrosting cycle.
3, when defrosting switching, very big compression shock and thermal shock can be caused to refrigeration system；The mode of defrosting is subcooled, also
It will cause absorbing gas belt liquid, system stability and safety decline；And biogas rise again it is very high, be cooled back to set temperature need one
A stabilization process can not achieve real continuous processing.
4, the diabatic process of refrigerant is phase transition process, when refrigerant and biogas directly exchange heat, because of biomass temperature
Degree, pressure, flow variation and cause refrigeration duty occur larger fluctuation in the case where, easily cause absorbing gas belt liquid, it is steady to influence system
Qualitative and safety；Or causing the compressor air suction degree of superheat too big, excessive discharge temperature, compressor power input increases.
5, two siloxanes removing heat exchangers once have one of them to break down, and system will be unable to actually enter continuous work
Make state.
Summary of the invention
Technical problem: the invention proposes a kind of energy continuous-stable work, shortening device booting buffer time and defrosting are cut
Stabilization process is changed, siloxanes in the biogas of system stability and siloxanes removal efficiency is improved and removes cold-storage device.
Technical solution: siloxanes removes cold-storage device, including refrigerating cycle unit, refrigerating medium in biogas of the invention
Cycling element and biogas siloxanes removal unit.Refrigerating cycle unit is by along the sequentially connected compression in refrigerant flow direction
Machine, condenser, expansion valve, cold-storage tank, gas-liquid separator composition, the outlet side of the gas-liquid separator be connected to compressor into
On gas end, circulation loop is constituted, refrigerating medium import, refrigerating medium outlet, refrigerant inlet and refrigeration are provided in the cold-storage tank
Agent exports, and the evaporation coil of connection refrigerant inlet and refrigerant outlet is provided in cold-storage tank, cold-storage tank is simultaneously refrigerating medium
The component part of cycling element.
Refrigerating medium cycling element includes cold-storage tank, refrigerating medium circulating pump and two siloxanes removing heat exchangers in parallel, institute
The refrigerating medium outlet for stating cold-storage tank is connect with the import of refrigerating medium circulating pump, and the outlet of refrigerating medium circulating pump is divided into two-way, respectively
It is correspondingly connected with onto the refrigerating medium import of a siloxanes removing heat exchanger, the refrigerating medium outlet of two siloxanes removing heat exchangers
Summarize and connect afterwards with the refrigerating medium import of cold-storage tank, two siloxanes removing heat exchanger is simultaneously biogas silicon oxygen
The component part of alkane removal unit.
Biogas siloxanes removal unit includes pre-cooling shell-and-tube heat exchanger for incoming flow biogas to be pre-chilled, two
A siloxanes removes heat exchanger, is provided with incoming flow biogas entrance, incoming flow biogas on the pre-cooling shell-and-tube heat exchanger
Outlet, pure biogas entrance and the outlet of pure biogas, the incoming flow biogas outlet are divided into two-way, respectively correspond
It is connected in the biogas import of a siloxanes removing heat exchanger；The biogas outlet of two siloxanes removing heat exchangers
It is connected after summarizing with pure biogas entrance.
Further, in apparatus of the present invention, refrigerating medium import is opened in 1/6 to 1/4 place of cold-storage tank top, and refrigerating medium outlet is opened
At cold-storage tank lower part 1/10 to 1/6, refrigerant inlet is opened in 2/5 to 3/5 place of top of cold-storage tank；Refrigerant outlet is opened in storage
1/10 to 1/6 place of lower part of cold tank.
Further, in apparatus of the present invention, evaporation coil is along the inclined direction exported from refrigerant inlet to refrigerating medium
Setting, each circle pipeline of evaporation coil is horizontal by 4-8 ° of angle.
In the present invention, refrigerating cycle unit includes: compressor, condenser, device for drying and filtering, liquid-sighting glass, expansion valve, evaporation
Coil pipe, gas-liquid separator.Compressor outlet side connection condenser inlet end phase, condenser outlet side connect expansion valve into
Gas end, the inlet end of the outlet side connection evaporation coil of expansion valve, evaporation coil outlet side connect the inlet end of gas-liquid separator,
The inlet end of the outlet side connect compressor of gas-liquid separator.Be successively arranged between condenser and expansion valve device for drying and filtering and
Liquid-sighting glass；Each component is connected by refrigerant tubing.
Refrigerating medium cycling element includes: that cold-storage tank, refrigerating medium circulating pump, the first removing heat exchanger and second are de- in the present invention
Except heat exchanger, the refrigerating medium outlet of the cold-storage tank is connect with the import of refrigerating medium circulating pump, and refrigerating medium flows through refrigerating medium circulation
Pump passes through third shut-off valve, the 4th shut-off valve after refrigerating medium is by the second uniaxial pressure water pump and the second triple valve respectively
It is connected in the refrigerating medium import of the first removing heat exchanger and the refrigerating medium import of the second removing heat exchanger, the load of two heat exchangers
Cryogen outlet summarize after by the first triple valve and the first uniaxial pressure water pump and cold-storage tank refrigerating medium import connection.Each component
It is connected by coolant ducts, and is equipped with control valve between each component.
Biogas siloxanes removal unit includes: pre-cooling shell-and-tube heat exchanger, the first removing heat exchanger, the in the present invention
Two removing heat exchangers, pre-cooling shell-and-tube heat exchanger blowdown apparatus, the first removing heat exchanger blowdown apparatus, the second removing heat exchanger row
Dirty device, third triple valve and the 4th triple valve.Shell-and-tube heat exchanger is pre-chilled there are four opening, respectively incoming flow biogas enters
The pure biogas after pure biogas entrance, removing siloxanes after mouth, the outlet of incoming flow biogas, removing siloxanes
Outlet.Incoming flow biogas entrance is connected to air duct, and the pure biogas outlet after removing siloxanes is connected to outlet
Pipeline.The outlet of incoming flow biogas is connected with an opening of third triple valve, other two opening of third triple valve is logical
Cross the 5th shut-off valve, the 8th shut-off valve is separately connected the biogas import of the first removing heat exchanger and second and removes heat exchanger
Biogas import；The two of them opening of 4th triple valve is separately connected the by the 7th shut-off valve, the 8th shut-off valve respectively
The biogas outlet of the biogas outlet of one removing heat exchanger and the second removing heat exchanger, another of the 4th triple valve go out
Mouth is connected with the pure biogas entrance after pre-cooling shell-and-tube heat exchanger removing siloxanes.Each component passes through biomass tracheae
Road connection, and control valve is equipped between each component, pre-cooling shell-and-tube heat exchanger, the first removing heat exchanger, the second removing heat exchange
Device is respectively provided with pre-cooling shell-and-tube heat exchanger blowdown apparatus and the first removing heat exchanger blowdown apparatus, the second removing heat exchanger blowdown
Device is pre-chilled on shell-and-tube heat exchanger and is also equipped with temperature and pressure probe.
The utility model has the advantages that compared with the prior art, the invention has the following advantages:
The present invention utilizes the intermediate heat transfer process of refrigerating medium using refrigerating medium cycling element, and refrigerant is not direct and biomass
Gas exchanges heat, avoid biogas temperature, pressure larger fluctuation variable parameter operation under, and cause absorbing gas belt liquid and mistake
The problems such as temperature is too big；Defrosting handoff procedure thermal shock and compression shock caused by refrigeration system is avoided simultaneously；It mentions significantly
The high stability of system, reliability and safety coefficient.
The present invention passes through to two heat exchanger connections in biogas siloxanes removal unit and refrigerating medium cycling element
The change and adjusting of mode can reduce the non-productive work time of start process and the process that defrosts, extend the defrosting cycle of device, mention
High system siloxanes removal efficiency is really realized and stablizes non-stop run.The refrigerating medium of the device is made with certain cold-storage
With by the variation of the flow-adaptable biogas refrigeration duty of control system adjusting refrigerating medium, in guarantee siloxanes removal efficiency
Under the premise of, loss of refrigeration capacity can be reduced, system energy efficiency is improved.
The present invention using another benefit of two removing heat exchangers work be due to its effective refrigeration and removing effect,
The gas for hardly generating biogas or oil field gas containing siloxanes enters engine etc., causes engine etc.
Structure so that can not work normally.
The present invention increases pre-cooling shell-and-tube heat exchanger before removing heat exchanger, on the one hand plays unstable to the flow of incoming flow
Fixed biogas plays certain current balance function, and on the other hand due to increasing heat transfer area, it is raw to easily facilitate removing incoming flow
Water vapour and partial impurities in substance gas, play the role of effective pre-cooling, at the same to avoid at 0 DEG C hereinafter, water vapour meeting
The case where being condensed in effective heat exchanger, the even blocking heat exchanger tube so that heat transfer effect is deteriorated, causing adverse effect appearance.
The pre-cooling shell-and-tube heat exchanger used in the present invention can make to flow out in incoming flow biogas and removing means low
The pure biogas of temperature carries out sufficient heat exchange, to accomplish the recycling of energy, incoming flow biogas is pre-chilled, and
And the volume of pre-cooling shell-and-tube heat exchanger can be reduced to the greatest extent, it is easily installed, save the cost.
Cold-storage tank is increased in refrigerating medium cooling and refrigerant circulation in the present invention, cold-storage tank can be according to Incoming gas
Content of siloxane, pressure, temperature the different controls for carrying out refrigerating agent fluxes, pass through the flow that control system adjusts refrigerating medium
It is suitable for the variation of biogas refrigeration duty, to avoid energy dissipation.There are four opening, refrigerating medium import is opened in cold-storage tank tool
1/6 to 1/4 place of top of cold-storage tank, is provided with Process into the coolant ducts in cold-storage tank, facilitates in refrigerating medium and pipe
Refrigerant tubing is able to carry out fully heat exchange；Refrigerating medium, which exports, is opened in 1/10 to 1/6 place of lower part of cold-storage tank, obtain compared with
While good heat transfer effect, it can prevent from causing installation inconvenient due to being open too low；The refrigerant inlet of evaporation coil is opened in
2/5 to 3/5 place of top of cold-storage tank；The refrigerant outlet of evaporation coil is opened in 1/10 to 1/6 place of lower part of cold-storage tank.
The heat exchange of cold-storage tank internal coolant and tube refrigerant uses the mixing side of fair current and cross-current in the present invention
Formula is integrally partial to fair current, and refrigerating medium is enabled to obtain more balanced low temperature in cold-storage tank, will not be too low due to temperature
And cause energy dissipation.
Evaporation coil is equipped in the present invention inside cold-storage tank, under evaporation coil is from refrigerant inlet side to refrigerant outlet side
Incline, each coil pipe that encloses is horizontal by one 4~8 ° of angle.Being arranged so can not only guarantee refrigerant inlet in evaporating pan
The highest point of pipe, refrigerant outlet are and total along Cheng from refrigerant inlet to refrigerant outlet in the lowest point of evaporation coil
It is decline, to guarantee to be in the state of fair current and cross-current in cold-storage tank；Meanwhile in first operation convenient for draining gas,
In order to avoid influencing heat transfer effect；It is also convenient for discharging refrigerant in maintenance, in order to maintenance personal's operation.
The present invention can also remove water vapour in biogas, weight carbon in the case where not reducing siloxanes removal efficiency
The impurity such as hydrocarbon.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention.
Fig. 2 is the schematic diagram of regenerator opening.
Fig. 3 is evaporation coil schematic diagram in regenerator.
Have in figure: 1 compressor, 2 condensers, 3 devices for drying and filtering, 4 liquid-sighting glass, 5 expansion valves, 6 evaporation coils, 7 gas-liquids point
From device, 8 cold-storage tanks, 9 first uniaxial pressure water pumps, 10 second uniaxial pressure water pumps, 11 first triple valves, 12 first shut-off valves,
14 second shut-off valves, 15 third shut-off valves, 17 the 4th shut-off valves, 18 second triple valves, 19 first removing heat exchangers, 19a first
Remove the biogas import of heat exchanger, 19b first removes the biogas outlet of heat exchanger, 19c first removes heat exchanger and changes
The refrigerating medium outlet of hot device, 19d first remove the refrigerating medium import of heat exchanger, 20 pre-cooling shell-and-tube heat exchangers, the pre- cold can of 20a
The incoming flow biogas import of formula heat exchanger, the incoming flow biogas outlet of 20c pre-cooling shell-and-tube heat exchanger, the pre- cold can of 20d
The pure life of pure biogas import, 20b pre-cooling shell-and-tube heat exchanger abjection siloxanes after formula heat exchanger abjection siloxanes
The outlet of substance gas, 21 second removing heat exchangers, 21a second removes the biogas import of heat exchanger, 21b second removes heat exchanger
Biogas outlet, 21c second remove heat exchanger heat exchanger refrigerating medium outlet, 21d second remove heat exchanger refrigerating medium
Import, 22 first removing heat exchanger blowdown apparatus, 23 pre-cooling shell-and-tube heat exchanger blowdown apparatus, 24 second removing heat exchanger blowdowns
Device, 27 third uniaxial pressure water pumps, 28 the 4th uniaxial pressure water pumps, 29 third triple valves, 30 the 5th shut-off valves, 32 the 6th sections
Only valve, 33 the 7th shut-off valves, 35 the 8th shut-off valves, 36 the 4th triple valves, 38 driers, 39 pre-cooling shell-and-tube heat exchanger temperature with
Pressure probe, 47 refrigerating medium circulating pumps, 48 cold-storage tank temperature and pressure probe, 52 the 9th shut-off valves, 53 the 5th uniaxial pressure water
Pump, 55 the 6th uniaxial pressure water pumps, 81 refrigerating medium imports, the outlet of 82 refrigerating mediums, 83 refrigerant inlets, 84 refrigerant outlets, 85
Horizontal plane.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawings and examples.
Siloxanes removing cold-storage device includes refrigerating cycle unit in biogas of the invention, refrigerating medium cycling element and
Biogas siloxanes removes cycling element.It include the pipeline of three kinds of substances, respectively refrigerant tubing, refrigerating medium in the present invention
Pipeline and biogas pipeline.Working principle is as follows: refrigerating cycle unit is a simple refrigeration system, passes through evaporation coil
The refrigerating medium released cold quantity external to it, refrigerating medium absorb after the cooling capacity of evaporation coil release by refrigerating medium cycling element into
The Incoming gas for entering siloxanes removing cycling element carries out cooling removing, what siloxanes removing cycling element was completed first inside it
It is that pre-cooling is carried out to the biogas of the instability of flow of incoming flow in serpentine coil and is flowed, makes the biogas of incoming flow and take off
The biogas of low temperature carries out sufficient heat exchange after siloxanes out, convenient for removing water vapour and the portion in incoming flow biogas
Dividing impurity, the biogas after being pre-chilled, which enters in three siloxanes abjection devices, carries out sufficient heat exchange with refrigerating medium,
Siloxanes in biogas is condensed into liquid after temperature reduction and is discharged by blowdown apparatus, completes to silicon in biogas
The removing of oxygen alkane, the biogas after deviating from siloxanes are flowed out by drier.
It include: compressor 1, condenser 2, device for drying and filtering 3, liquid-sighting glass 4, expansion valve in refrigerating cycle unit in the present invention
5, evaporation coil 6, gas-liquid separator 7.The inlet end of the outlet side connection condenser of compressor is connected, and condenser outlet side connects
The inlet end of expansion valve is connect, the inlet end of the outlet side connection evaporation coil of expansion valve, evaporation coil outlet side connects gas-liquid point
Inlet end from device, the inlet end of the outlet side connect compressor of gas-liquid separator.It is successively set between condenser and expansion valve
There are device for drying and filtering 3 and liquid-sighting glass 4；Each component is connected by refrigerant tubing.
In the present invention refrigerating medium cycling element include: cold-storage tank 8, refrigerating medium circulating pump 47 and first removing heat exchanger 19,
Second removing heat exchanger 20 and third remove heat exchanger 21, refrigerating medium outlet and the refrigerating medium circulating pump 47 of the cold-storage tank 8
Import connection, refrigerating medium flows through refrigerating medium circulating pump 47, after the second uniaxial pressure water pump 10 and the second triple valve 18, point
It Jing Guo not third shut-off valve 15, the 4th shut-off valve 17, the refrigerating medium import 19d for being connected to the first removing heat exchanger heat exchanger and
On the refrigerating medium import 21d of two removing heat exchanger heat exchangers, the refrigerating medium outlet 19c and 21c of two heat exchangers summarize after by
First triple valve 11 and the first uniaxial pressure water pump 9 are connect with the refrigerating medium import of cold-storage tank 8.Wherein refrigerating medium enters by 81
Pipeline inside to cold-storage tank is provided with Process, carries out heat exchange with evaporation coil by way of spray, and each component passes through load
The connection of cryogen pipeline, and control valve is equipped between each component.
Biogas siloxanes removal unit includes: that pre-cooling shell-and-tube heat exchanger 20, first removes heat exchanger in the present invention
19 and second remove heat exchanger 21, the pre-cooling removing heat exchanger blowdown apparatus 22, second of shell-and-tube heat exchanger blowdown apparatus 23, first
Remove heat exchanger blowdown apparatus 24, third triple valve 29 and the 4th triple valve 36.Opening that there are four pre-cooling shell-and-tube heat exchangers 20,
Pure biogas entrance after respectively incoming flow biogas entrance 20a, incoming flow biogas outlet 20c, removing siloxanes
Pure biogas after 20d, removing siloxanes exports 20b.Incoming flow biogas entrance 25a is connected to air duct, removing
Pure biogas outlet 25b after siloxanes is connected to outlet pipe.Incoming flow biogas exports 25c and third triple valve 29
An opening be connected, third triple valve 29 other two opening by the 5th shut-off valve 30, the 6th shut-off valve 32 distinguish
The biogas import 21a of the removing heat exchanger of biogas import 19a and second of connection the first removing heat exchanger；4th threeway
The two of them import of valve 36 passes through the 7th shut-off valve 33 respectively and the 8th shut-off valve 35 is separately connected the first removing heat exchanger
The biogas that biogas exports the removing heat exchanger of 19b and second exports 21b, another outlet of the 4th triple valve 36 with it is pre-
Pure biogas entrance 20c after the removing siloxanes of cold can formula heat exchanger 20 is connected.Each component passes through biomass tracheae
Road connection, and control valve is equipped between each component, pre-cooling shell-and-tube heat exchanger 20, first removes heat exchanger 19, second and removes
Heat exchanger 21 is respectively provided with pre-cooling shell-and-tube heat exchanger blowdown apparatus 23 and the first removing heat exchanger blowdown apparatus 22, second removes
Heat exchanger blowdown apparatus 24 is pre-chilled on shell-and-tube heat exchanger 20 and is also equipped with temperature and pressure probe 39.
The operating condition of the embodiment of the present invention one, a preparation and a use is made of two heat exchangers in parallel.With the first removing
Heat exchanger 19 defrosts, and for the second removing heat exchanger 21 freezes, is first shut off the 7th shut-off valve 33, the 9th shut-off valve 52, first
The biogas of shut-off valve 12 and third shut-off valve 15, high temperature and humidity in 20 elder generation of pre-cooling shell-and-tube heat exchanger and has removed
The low-temperature biological matter gas of siloxanes carries out heat exchange, then passes through the company of third uniaxial pressure water pump 27 and third triple valve 29
Connect, be divided into two-way: the first via enter first removing heat exchanger biogas import 19a, first removing heat exchanger 19 in by
In no refrigerating medium, it is still in biogas one-way flow of the higher temperatures compared with high humidity state after pre-cooled, the first removing is changed
Hot device 19 defrosts, and then comes out from the biogas outlet 19b of the first removing heat exchanger, by the 5th uniaxial pressure water pump
53 and the 13rd shut-off valve 50 enters the second removing heat exchanger 21 from the biogas import 21a of the second removing heat exchanger, with institute
It states refrigerating medium and carries out heat exchange, release heat and remove moisture and siloxanes, then, from the biomass of the second removing heat exchanger
Gas outlet 21b comes out；Biogas is by after the 4th uniaxial pressure water pump 28, flowing into pre-cooling pipe at the 4th triple valve 36
Shell heat exchanger 20 and the newborn substance gas of high temperature and humidity carry out heat exchange, are then discharged by drier 38.It is followed in refrigerating medium
The first shut-off valve 12 and third shut-off valve 15 are closed in ring element part, and the cooling capacity in cold-storage tank 8 is controlled by the second shut-off valve 14
The size of aperture controls the cooling capacity of conveying, while extra cooling capacity can be stored in cold-storage tank.Second removing heat exchanger 21
The case where defrosting, the first removing heat exchanger 19 freezes, is similar to the first situation.
The embodiment of the present invention three, in addition to the 13rd shut-off valve 50, the 9th shut-off valve 52 are closed, other valves are all in open
State, it is in parallel connection that the first removing heat exchanger 19, second, which removes heat exchanger 21, carries out heat exchange with refrigerating medium, releases heat
And moisture and siloxanes are removed, the siloxanes of removing removes heat exchanger row from the first removing heat exchanger blowdown apparatus 22, second
It is detached in dirty device 24.It, can also be by alternately opening another heat exchange if wherein there is a heat exchanger to break down
Device realizes system continuous duty.
In described device, the removal efficiency of siloxanes is adjusted to ensure that by refrigerating agent flux and improves efficiency.The present invention
In, it is equipped with temperature and pressure probe 39 on pre-cooling shell-and-tube heat exchanger 20, the temperature and pressure of incoming flow biogas can be measured
Variation；Temperature and pressure probe 39 feed back the value of measurement into automatic control system, are computed and obtain the cold of biogas
Load, and by the aperture of control valve to control refrigerating agent flux；Guarantee biogas reach treatment temperature requirement feelings
Under condition, the waste of cooling capacity not will cause.Refrigerating medium in cold-storage tank 8 has certain cool storage function；When biogas refrigeration duty
Less than refrigerating cycle unit to provided by refrigerating medium when cooling capacity, refrigerating medium in cold-storage tank 8 can excess of storage cooling capacity, work as biology
Matter air cooling load is greater than refrigerating cycle unit to when cooling capacity, the refrigerating medium in cold-storage tank 8 is releasably stored provided by refrigerating medium
Cooling capacity.By the flexible modulation to refrigerating medium, guarantee the reliablely and stablely working condition of refrigerating cycle unit；It also can be biomass
Air lift is for appropriate sufficient cooling capacity.
The embodiment of the present invention four, refrigerating medium import are opened at cold-storage tank top 1/6, when being higher than at 1/6, due to being open
Height causes installation inconvenient；Refrigerating medium outlet is opened at cold-storage tank lower part 1/10, when being lower than at 1/10, causes to pacify since opening is too low
Dress is inconvenient；Refrigerant inlet is opened at the top 2/5 of cold-storage tank, can be guaranteed to export holding certain distance with refrigerating medium, be made to carry
Cryogen sprays when contacting with heat exchange coil with certain speed, meets the requirement of heat transfer effect；Refrigerant outlet is opened in
At the lower part 1/10 of cold-storage tank, when being lower than at 1/10, cause installation inconvenient since opening is too low.
The embodiment of the present invention five, refrigerating medium import are opened at cold-storage tank top 1/4, ensure that refrigerating medium sprays tool
There is certain flow velocity, heat transfer effect is preferable, and when being lower than at 1/4, heat transfer effect is bad；Refrigerating medium outlet is opened in cold-storage tank lower part 1/
At 6, when being higher than at 1/6, refrigerating medium cannot sufficiently exchange heat with heat exchange coil, and heat transfer effect is bad；Refrigerant inlet is opened in cold-storage
At the top 3/5 of tank, when being lower than at 3/5, it is unable to satisfy the length of heat exchange coil, causes heat transfer effect bad；Refrigerant outlet
It is opened at the lower part 1/6 of cold-storage tank, when being higher than at 1/6, heat transfer effect is bad.
In preferred embodiment of the invention, refrigerating medium import is opened at cold-storage tank top 1/5；Refrigerating medium outlet is opened in cold-storage tank
At lower part 1/10；Refrigerant inlet is opened at the top 1/2 of cold-storage tank；Refrigerant outlet is opened at the lower part 1/8 of cold-storage tank.Both
Ensure that refrigerating medium is sprayed with certain flow velocity, ensure that heat exchange coil have certain length, ensure that refrigerating medium with
The abundant heat exchange of heat exchange coil, has reached expected heat transfer effect, in turn avoids causing to install due to being open higher or lower
It is inconvenient.
In preferred embodiment of the invention, each circle pipeline plane of evaporation coil horizontal by 4-8 ° or so angle, with
Conducive to the flowing of its refrigerant, some inconveniences caused by gas-liquid separation are reduced, keep the flowing of refrigerant more smoothly, made
Cold better effect.
In preferred embodiment of the invention, the pipeline of evaporation coil is preferred with flat, while having the convex annular of certain altitude
It rises, in favor of the cold and hot exchange of refrigeration evaporator.
In preferred embodiment of the invention, using the heat exchange mode of pure fair current sprinkling inside cold-storage tank.
Apparatus of the present invention can handle rubbish landfill gas, sludge methane, oil field gas under multi-state state etc.；The dress
R22, R410a, R407c etc. can be used in the refrigerating cycle unit refrigerant working medium set.
Above-described embodiment is only the preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill of the art
For personnel, without departing from the principle of the present invention, several improvement and equivalent replacement can also be made, these are to the present invention
Claim improve with the technical solution after equivalent replacement, each fall within protection scope of the present invention.
Claims (3)
1. siloxanes removing means in a kind of biogas, which is characterized in that the device includes that refrigerating cycle unit, refrigerating medium follow
Ring element and biogas siloxanes removal unit；
The refrigerating cycle unit is by along the sequentially connected compressor in refrigerant flow direction (1), condenser (2), expansion valve
(5), cold-storage tank (8), gas-liquid separator (7) composition, the outlet side of the gas-liquid separator (7) be connected to compressor (1) into
On gas end, circulation loop is constituted, refrigerating medium import (81), refrigerating medium outlet (82), refrigerant are provided on the cold-storage tank (8)
Import (83) and refrigerant outlet (84) are provided with connection refrigerant inlet (83) and refrigerant outlet (84) in cold-storage tank (8)
Evaporation coil (6), cold-storage tank (8) simultaneously be refrigerating medium cycling element component part；
The refrigerating medium cycling element includes that cold-storage tank (8), refrigerating medium circulating pump (47) and two siloxanes removings in parallel are changed
The refrigerating medium outlet of hot device (19,21), the cold-storage tank (8) is connect with the import of refrigerating medium circulating pump (47), refrigerating medium circulation
The outlet of pump (47) is divided into two-way, is connected respectively onto the refrigerating medium import of a siloxanes removing heat exchanger, two silicon
The refrigerating medium outlet of oxygen alkane removing heat exchanger is connect after summarizing with the refrigerating medium import of cold-storage tank (8), two siloxanes
Removing heat exchanger is the component part of biogas siloxanes removal unit simultaneously；
The biogas siloxanes removal unit includes the pre-cooling shell-and-tube heat exchanger for incoming flow biogas to be pre-chilled
(20), two siloxanes remove heat exchanger (19,21), are provided with incoming flow biogas on the pre-cooling shell-and-tube heat exchanger (20)
Entrance (20a), incoming flow biogas outlet (20c), pure biogas entrance (20d) and pure biogas outlet (20b),
The incoming flow biogas outlet (20c) is divided into two-way, is connected respectively the biomass to a siloxanes removing heat exchanger
In gas import；The biogas outlet of two siloxanes removing heat exchangers is connected after summarizing with pure biogas entrance (20d)
It connects.
2. siloxanes removing means in biogas according to claim 1, which is characterized in that the refrigerating medium import
(81) it is opened in 1/6 to 1/4 place of cold-storage tank (8) top, refrigerating medium outlet (82) is opened in 1/10 to 1/6 place of cold-storage tank (8) lower part, makes
Cryogen import (83) is opened in 2/5 to 3/5 place of top of cold-storage tank (8)；Refrigerant outlet (84) is opened in the lower part 1/ of cold-storage tank (8)
10 to 1/6 places.
3. siloxanes removing means in biogas according to claim 1 or 2, which is characterized in that the evaporation coil
(6) it is arranged along the inclined direction for exporting (82) from refrigerant inlet (83) to refrigerating medium, each circle pipeline of evaporation coil (6)
Horizontal by 4-8 ° of angle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610271036.2A CN105910389B (en) | 2016-04-27 | 2016-04-27 | Siloxanes removing means in a kind of biogas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610271036.2A CN105910389B (en) | 2016-04-27 | 2016-04-27 | Siloxanes removing means in a kind of biogas |
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| Publication Number | Publication Date |
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| CN105910389A CN105910389A (en) | 2016-08-31 |
| CN105910389B true CN105910389B (en) | 2018-12-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100356113C (en) * | 2005-12-16 | 2007-12-19 | 珠海慧生能源技术发展有限公司 | Dynamic ice-storage energy saving unit |
| CN101224348A (en) * | 2007-10-15 | 2008-07-23 | 吴未立 | Method of removing siloxane from combustible gas, application and system thereof |
| CN102382701B (en) * | 2011-11-01 | 2013-10-09 | 南京师范大学 | Device capable of removing siloxane in combustible gas stably and continuously |
| JP2014015504A (en) * | 2012-07-06 | 2014-01-30 | Sumitomo Seika Chem Co Ltd | Treatment method and treatment system of biogas |
-
2016
- 2016-04-27 CN CN201610271036.2A patent/CN105910389B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100356113C (en) * | 2005-12-16 | 2007-12-19 | 珠海慧生能源技术发展有限公司 | Dynamic ice-storage energy saving unit |
| CN101224348A (en) * | 2007-10-15 | 2008-07-23 | 吴未立 | Method of removing siloxane from combustible gas, application and system thereof |
| CN102382701B (en) * | 2011-11-01 | 2013-10-09 | 南京师范大学 | Device capable of removing siloxane in combustible gas stably and continuously |
| JP2014015504A (en) * | 2012-07-06 | 2014-01-30 | Sumitomo Seika Chem Co Ltd | Treatment method and treatment system of biogas |
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| CN105910389A (en) | 2016-08-31 |
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Effective date of registration: 20181022 Address after: 213115 Ninghe village, Zhenglu Town, Tianning District, Changzhou, Jiangsu Applicant after: Jiangsu You Miao Ingegneria Ambientale S.R.L. Address before: 210097 Ninghai Road, Drum Tower District, Nanjing, Jiangsu Province, No. 122 Applicant before: Nanjing Normal University |
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Effective date of registration: 20230322 Address after: 213000 Ninghe village, Zhenglu Town, Tianning District, Changzhou, Jiangsu Patentee after: CHANGZHOU TONGYI DRYING EQUIPMENT Co.,Ltd. Address before: 213115 Ninghe village, Zhenglu Town, Tianning District, Changzhou, Jiangsu Patentee before: Jiangsu You Miao Ingegneria Ambientale S.R.L. |
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