CN104406040A - ANG storage device for small city peak shaving and ANG peak shaving method thereof - Google Patents
ANG storage device for small city peak shaving and ANG peak shaving method thereof Download PDFInfo
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- CN104406040A CN104406040A CN201410566882.8A CN201410566882A CN104406040A CN 104406040 A CN104406040 A CN 104406040A CN 201410566882 A CN201410566882 A CN 201410566882A CN 104406040 A CN104406040 A CN 104406040A
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- 238000003860 storage Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000001179 sorption measurement Methods 0.000 claims abstract description 88
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000007789 gas Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000003345 natural gas Substances 0.000 claims abstract description 34
- 230000000694 effects Effects 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 239000011435 rock Substances 0.000 claims description 22
- 239000002594 sorbent Substances 0.000 claims description 17
- 238000003795 desorption Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 15
- 229930195733 hydrocarbon Natural products 0.000 claims description 14
- 150000002430 hydrocarbons Chemical class 0.000 claims description 14
- 238000012546 transfer Methods 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 239000004215 Carbon black (E152) Substances 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 4
- 230000008439 repair process Effects 0.000 claims description 4
- 239000010865 sewage Substances 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 238000005261 decarburization Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 9
- 239000003949 liquefied natural gas Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses an ANG storage device for small city peak shaving and an ANG peak shaving method thereof; the device comprises at least two ANG storage tanks and at least two pre-adsorption tanks; one end of each pre-adsorption tank is connected with a valve in series and then the pre-adsorption tanks are connected in parallel, and the parallel end is connected with a first online chromatographic detector and is connected with a high-pressure natural gas pipeline through a first valve; one end of each pre-adsorption tank is also connected with another valve in series and the pre-adsorption tanks are connected in parallel, and the parallel end is connected with a high-pressure N2 pipeline through an electric heater and a third valve; the other end of each pre-adsorption tank is connected with a valve in series and then the pre-adsorption tanks are connected in parallel, and one parallel connection end is connected with a low-pressure natural gas pipeline through a valve; the parallel connection end is also connected with a parallel end of the at least two ANG storage tanks through a second online chromatographic detection instrument and a valve; an adsorption heat effect of natural gas is eliminated by adopting a circulating water pipe, and the ANG storage device has the advantages of small storage tank volume, large gas storage capacity, low gas storage pressure, good safety, convenient operation and the like.
Description
Technical field
The present invention relates to city gas peak shaving technical field, particularly relate to a kind of ANG storage tank for micropolis peak regulation and ANG peak regulating method thereof.
Background technique
No matter rock gas is applied to industrial or civilian, and the key issue needing most solution is exactly peak regulation, in natural gas transport process, needs to solve air demand and the unbalanced difficult problem of gas consumption, more outstanding in domestic gas system.For addressing this problem, the distributing system of rock gas is mainly provided with peak regulation facility to realize air feed and by the balance between gas.
At present, method for natural gas peak-shaving has a lot, as compressed natural gas (CNG), LNG Liquefied natural gas (LNG), absorbed natural gas (ANG) etc., in these natural gas peak-shaving modes, the problems such as natural gas adsorption compressed natural gas is stored by higher pressure by CNG, and during peaking operation, existence costly, pressure store is high, Security is low; LNG mode is then form LNG Liquefied natural gas in storage tank, has higher volume energy density, but the building a station costly of this mode, operation energy consumption are large; ANG suction type is then stored by adsorbent natural gas adsorption, and cost investment is little, and pressure store is low, and Safety performance is good, has obvious advantage.
The research that current people adsorb storage tank and abundant gas process thereof at ANG is more.Chinese invention patent application CN 1236075A discloses a kind of absorbed natural gas storage tank and filling process, and its technical characteristics fills sorbent in storage tank, and solve the problem of temperature rise of quick aeration by cryogenic natural gas recirculation; But its shortcoming is gas storage limited volume and the technique of elimination heat of adsorption effect is too complicated.Chinese invention patent application CN 1529084A discloses a kind of natural gas storing means of transprotation and device, and its main feature utilizes cold wind or cold water to carry out spraying cooling when inflating, and utilizes hot blast or heat water-spraying to heat during venting; But it is large that its shortcoming is power consumption, and when rock gas gas-storing capacity is larger, energy consumption is too high, and shows according to research, and when storage tank is larger, the heat of adsorption effect of rock gas is mainly in tank inside central position, and the method effectively can not eliminate the heat of adsorption effect of large-scale storage tank.Chinese invention patent application CN 102302925A utilizes circulating water to eliminate heat of adsorption effect, but circulating water coiled tube arrangements is only applicable to small-sized storage tank disclosed in it, when city peak regulation storage tank is larger, the situation of change of temperature when Adsorption Natural Gas and desorption effectively can not be eliminated.Above-mentioned prior art has common shortcoming, namely the design of storage tank is not suitable for large-scale natural gas storing, and City Gas Load has larger nonuniformity, when air demand changes, if the waste of energy can be caused by maximum load design, if can cause again can not meet normal operation not according to maximum load design, can not the heat load of effective abatement apparatus.
Summary of the invention
The object of the invention is to provide a kind of ANG tank arrangement for micropolis peak regulation and ANG peak regulating method thereof, solves the peaking problem of city Different periods gas consumption change, has the features such as little, the effective gas-storing capacity of working pressure is high, handling safety.
This law there is not object to be achieved through the following technical solutions:
For the ANG tank arrangement of micropolis peak regulation, comprise at least two ANG storage tanks and at least two pre-adsorption tanks; At least two ANG storage tanks are connected in parallel; At least two pre-adsorption tanks are connected in parallel, and each pre-adsorption tanks one end is connected in series rear in parallel with a valve, and parallel connected end connects the first on-line chromatograph detector, and are connected with high-pressure natural gas pipeline by the first valve; One end of each pre-adsorption tanks is connected in parallel after also connecting with another valve, and parallel connected end is by electric heater and the 3rd valve and high pressure N
2pipeline connects; The other end of each pre-adsorption tanks is connected with a valve rear respectively and connects, and the one end connect is connected with low pressure natural gas pipeline by valve; And the one end connect also is connected with the parallel connected end of valve with at least two ANG storage tanks by the second on-line chromatograph detector; First on-line chromatograph detector is connected with computer with the second on-line chromatograph detector;
Described ANG tank top has a global cycle water pipe downward, is divided into several circulating water intensify heat transfer pipe through top circular header, at the several circulating water intensify heat transfer pipe of tank bottom again through bottom circular header and be a global cycle water pipe; Be provided with screw thread in circulating pipe pipe, pipe is outer is provided with fin, and circulating water, at Bottomhole pressure, installs thermocouple in storage tank; ANG storage tank arranges multi-layer silk screen, and every layer of silk screen is provided with active carbon; Arrange silk screen layering in pre-adsorption tanks, sorbent is filled on silk screen.
Preferably, one end of described pre-adsorption tanks is provided with drain, and the other end is provided with sewage draining exit.
Described first on-line chromatograph detector and the second on-line chromatograph detector select GC910 type gas chromatographic detection instrument.
Described screw thread is female thread structure, pitch 16mm, Width of thread 8mm, height of thread 2mm.
Described fin is rectangular fin, and fin profile is of a size of 4mm × 16mm, spacing of fin is 14mm.
Described circulating pipe gateway arranges a thermometer respectively.
Every layer of silk screen spacing of described ANG storage tank is 1 ~ 1.5m.
Described active carbon is cylindrical shape, and diameter is 28 ~ 32mm, thickness is 10 ~ 50mm.
Described ANG storage tank selects low alloy steel as tank material, and tank volume is set to 200m
3, 500m
3, 3000m
3, 5000m
3or 10000m
3.
Apply the natural gas peak-shaving method of described device, comprise inflation and deflation course:
1) gas replenishment process: when the force value of high-pressure gas is greater than setting value, the first valve open, high-pressure gas enters the first pre-adsorption tanks through the 6th valve and carries out decarburization, and the second pre-adsorption tanks are as subsequent use; Then the 8th valve, the 11 valve open, pretreated rock gas enters ANG storage tank and stores; When the first on-line chromatograph detector and the second on-line chromatograph detector detect that after pre-adsorption tanks, water and heavy hydrocarbons content difference are little, the pre-sorbent now in the first pre-adsorption tanks lost efficacy, and can not remove water contained in rock gas and heavy hydrocarbon; Close the 6th valve, the 8th valve, open the 7th valve, the 9th valve makes rock gas enter the second pre-adsorption tanks to carry out pre-absorption and dewater and heavy hydrocarbon, the first pre-adsorption tanks regenerate, two pre-adsorption tanks alternate runs;
Pre-adsorption tanks regenerative process: after the first pre-adsorption tanks absorption is full, opens emptying storage tank mouth after closing the 6th valve, the 8th valve, pressure of storage tank is discharged to a little higher than atmospheric pressure, then opens the 3rd valve, the 4th valve, high pressure N
2the pre-adsorption tanks passing into inefficacy after electric heater is heated to 200 DEG C regenerate, and make the water in pre-sorbent and heavy hydrocarbon desorption, recover the activity of pre-sorbent;
Deflation course: when the force value of low pressure natural gas pipes is lower than setting value, now air demand is not enough, needs peak adjusting device to carry out supplementary air feed; Open the second valve, the tenth valve, the 11 valve, close all the other valves; The force value of low-pressure pipe network is lower, now ANG storage tank be communicated with low-pressure pipe network after pressure reduce, automatically carry out desorption, the rock gas after desorption enters low pressure line after the second valve.
The present invention compared with prior art, has following characteristics:
1) circulating pipe elimination heat of adsorption effect efficiency is high.In rock gas adsorption desorption process, there is not obvious temperature gradient in absorption storage tank, temperature gradient is mainly present in radial direction vertically, proves that the impact of heat of adsorption effect concentrates on the central position of absorption storage tank.The present invention, according to the feature of spherical storage tank, devises circulating water coil pipe pattern, and coil pipe is evenly distributed at the middle position of spherical storage tank, can eliminate heat of adsorption effect efficiently.
2) temperature control system ensures flexible operation.In storage tank, temp probe is installed, the consumption of circulating water can be regulated according to the temperature detected, be applicable to the situation that in peak regulation process, gas discharge is uneven.
3) inflation/deflation process operation is continuous.For the composition of pipe natural gas, the heavy hydrocarbon in pre-adsorption tanks absorption rock gas and a small amount of sulphur are set, eliminate the materials such as heavy hydrocarbon to the impact of high surface activity carbon adsorption performance.Simultaneously in peak regulation process, gas discharge is large, operating the feature such as continuous, to arrange two pre-adsorption tanks in parallel, wherein pre-adsorption tanks T101 adsorb full after cutting-off valve, pipeline is switched to pre-adsorption tanks T102, adsorption tanks T101 regenerates, and ensures the continuity of operation.
4) easy to operate, equipment is few, operating cost is low.Traditional pressure-swing absorption process needs to utilize compressor to adsorb gas pressurized, need vacuumize and reduce pressure during desorption, makes gas desorption from sorbent.The present invention utilizes the feature needing pressure regulation in natural gas transportation process, and when gas-use low peak, equipment is communicated with high pressure pipe network, and before utilizing pressure regulation, the high pressure of pipe network adsorbs; Be communicated with low-pressure pipe network with equipment during gas peak, the feature that after utilizing pressure regulation, ductwork pressure is lower carries out desorption.Contrast traditional pressure-swing absorption process and have the advantages that operation is convenient, equipment is few, operating cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the absorbed natural gas tank arrangement for micropolis peak regulation.
Fig. 2 is ANG storage tank longitudinal sectional drawing in Fig. 1.
Fig. 3 be in Fig. 2 A ?A to sectional view.
Fig. 4 is the cross-sectional view of circulating pipe in Fig. 2.
Shown in figure: electric heater 1, drain 2, pre-adsorbent equipment 3, sewage draining exit 4, the first on-line chromatograph detector 5, second on-line chromatograph detector 6, ANG storage tank 7, top circular header 8, circulating water intensify heat transfer pipe 9, bottom circular header 10, thermocouple 11, silk screen 12, screw thread 13, fin 14.
Specific implementation method
For understanding the present invention better, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
As shown in Figure 1, a kind of absorbed natural gas tank arrangement for micropolis peak regulation, comprises at least two ANG storage tanks 7 and at least two pre-adsorption tanks 3; At least two ANG storage tanks 7 are connected in parallel; At least two pre-adsorption tanks 3 are connected in parallel, and each pre-adsorption tanks 3 one end is connected in series rear in parallel with a valve, and parallel connected end connects the first on-line chromatograph detector 5; Parallel connected end is also connected with high-pressure natural gas pipeline by the first valve F1; One end of each pre-adsorption tanks is connected in parallel after also connecting with another valve, and parallel connected end is by electric heater 1 and the 3rd valve F3 and high pressure N
2pipeline connects; The other end of each pre-adsorption tanks is connected with a valve rear respectively and connects, and the one end connect is connected with low pressure natural gas pipeline by valve; And the one end connect also is connected with the parallel connected end of valve with at least two ANG storage tanks 7 by the second on-line chromatograph detector 6.First on-line chromatograph detector 5 is connected with computer with the second on-line chromatograph detector 6, detects rock gas composition when needed.One end of pre-adsorption tanks 3 is provided with drain 2, and the other end is provided with sewage draining exit 4.First on-line chromatograph detector 5 and the second on-line chromatograph detector 6 can select GC910 type gas chromatographic detection instrument.
As shown in Figure 2,3, 4, ANG storage tank 7 top has a global cycle water pipe downward, several circulating water intensify heat transfer pipe 9 is divided into through top circular header 8, at the several circulating water intensify heat transfer pipe 9 of tank bottom again through bottom circular header 10 and be a global cycle water pipe, concrete pattern is shown in shown in Fig. 2,3.Circulating water is entered by the top of ANG storage tank 7, bottom is got rid of, and the concrete quantity of circulating water intensify heat transfer pipe 9 is determined according to the concrete volume of storage tank; As shown in Figure 4, be provided with screw thread 12 in circulating pipe pipe, screw thread 12 is female thread structure, pitch 16mm, Width of thread 8mm, height of thread 2mm; Pipe is outer is provided with fin 14, and fin 14 is rectangular fin, and fin profile is of a size of 4mm × 16mm, spacing of fin is 14mm; Circulating water is at Bottomhole pressure, and install thermocouple 11 in storage tank, circulating pipe gateway arranges a thermometer respectively.ANG storage tank 7 arranges multi-layer silk screen 12, every interlamellar spacing 1 ~ 1.5m, and every layer of silk screen is provided with active carbon, and active carbon is cylindrical shape, diameter 28 ~ 32mm, thickness 10 ~ 50mm; Working pressure 1.8 ~ the 2.2Mpa of ANG storage tank 7, design pressure is a little more than working pressure, and operating temperature is room temperature, and design temperature is a little more than operating temperature;
Also arrange silk screen layering in pre-adsorption tanks, sorbent is filled on silk screen, and one deck sorbent one deck silk screen, tank both sides all compress sorbent with silk screen, prevent absorbent powder from entering pipeline.
ANG storage tank 7 selects low alloy steel as tank material, and tank volume can be set to 200m
3, 500m
3, 3000m
3, 5000m
3or 10000m
3deng.
Embodiment
As shown in Figure 1, pre-adsorption tanks are two, are respectively pre-adsorption tanks T102, the ANG storage tank 9 of the first pre-adsorption tanks T101 and second and are also two.One end of the pre-adsorption tanks T102 of first pre-adsorption tanks T101 and second is connected in series rear in parallel with the 6th valve F6 and the 7th valve F7 respectively, and parallel connected end is connected with high-pressure natural gas pipeline by the first on-line chromatograph detector 5, first valve F1; One end of the pre-adsorption tanks T102 of first pre-adsorption tanks T101 and second is connected in parallel after also connect with the 4th valve F4 and the 5th valve F5 respectively, and parallel connected end passes through electric heater 5 and the 3rd valve F3 and high pressure N
2pipeline connects; The other end of the pre-adsorption tanks T102 of the first pre-adsorption tanks T101 and second is connected with the 8th valve F8 and the 9th valve F9 rear respectively and connects, and the one end connect is connected with low pressure natural gas pipeline with the second valve F2 by the tenth valve F10; And the one end connect also is connected with the parallel connected end of two ANG storage tanks 11 with the 11 valve F11 by the second on-line chromatograph detector 6.
Methods for filling of the present invention comprises gas replenishment process and deflation course, also has pre-adsorption tanks regenerative process in addition.
Gas replenishment process: when the force value of high-pressure gas is greater than setting value, the first valve F1 opens, and high-pressure gas enters the first pre-adsorption tanks T101 through the 6th valve F6 and carries out decarburization, and the second pre-adsorption tanks T102 is as subsequent use.Then the 8th valve F8, the 11 valve F11 open, and pretreated rock gas enters ANG storage tank and stores.When the first on-line chromatograph detector 5 and the second on-line chromatograph detector 6 detect that after pre-adsorption tanks, water and heavy hydrocarbons content difference are little, prove that the pre-sorbent in now the first pre-adsorption tanks T101 lost efficacy, water contained in rock gas and heavy hydrocarbon can not be removed.Now close the 6th valve F6, the 8th valve F8, open the 7th valve F7, the 9th valve F9 makes rock gas enter the second pre-adsorption tanks T102 to carry out adsorbing in advance dewatering and heavy hydrocarbon, the first pre-adsorption tanks T101 regenerates, two pre-adsorption tanks alternate runs.
Pre-adsorption tanks regenerative process: the first pre-adsorption tanks T101 adsorbs completely, opens emptying storage tank mouth, pressure of storage tank is discharged to a little higher than atmospheric pressure, then opens the 3rd valve F3, the 4th valve F4, high pressure N after closing the 6th valve F6, the 8th valve F8
2the pre-adsorption tanks passing into inefficacy after electric heater is heated to 200 DEG C regenerate, and make the water in pre-sorbent and heavy hydrocarbon desorption, recover the activity of pre-sorbent.
Deflation course: when the force value of low pressure natural gas pipes is lower than setting value, now air demand is not enough, needs peak adjusting device to carry out supplementary air feed.Open the second valve F2, the tenth valve F10, the 11 valve F11, close all the other valves.Because the force value of low-pressure pipe network is lower, now ANG storage tank be communicated with low-pressure pipe network after pressure reduces, automatically carry out desorption, the rock gas after desorption enters low pressure line after the second valve F2, and this overlaps the voltage-regulating system parallel arranged at charge and discharge device and door station.
Working pressure 1.8 ~ the 2.2Mpa of this concrete process ANG storage tank 7, design pressure is a little more than working pressure, and operating temperature is room temperature, and design temperature is a little more than operating temperature.The all a little higher than operating temperature pressure of design temperature, pressure is the safe and stable operation in order to ensure equipment, and what prevent start and stop occurs danger situation in a flash.
The heat release of Adsorption Natural Gas process causes system temperature to raise, and reduces extent of adsorption; Desorption process heat absorption causes system temperature to reduce, and adds desorption residual volume; Two kinds of effects can reduce the dynamic adsorbance of system to a great extent.Increase circulation during tank designs and maintain tank inside temperature constant, consider that the storage volume of rock gas is directly proportional to the amount of sorbent in storage tank simultaneously.So the impact on tank inside volume should be reduced while increasing circulation as far as possible, calculate the outer fin reinforcing pipe of internal thread and ordinary cycle water pipe heat transfer effect in the same circumstances below respectively.
40000m is had during certain city gas-use low peak
3rock gas (1600kmol), setting working pressure is 2MPa, then need tank volume 500m3, diameter 10000mm, wall thickness 38mm, and inside arranges 130 circulating pipes, and inflationtime is 8 hours.The heat of adsorption of high superficiality active carbon is 16KJ/mol, if that is by 40000m
3rock gas discharge and can produce 2.56 × 10
7the heat of KJ.The bulk density of high surface activity carbon is 450kg/m3, and specific heat is 1250J/ (kgK), consumption 200 tons.Following relation is had between heat and heat exchange area:
Q＝A×K×ΔT
m＝c×m×ΔT
The intensification amount of high surface activity carbon is Δ T=2.56 × 10
7÷ 1.25 ÷ 200000=102.4 DEG C.Room temperature is 25 DEG C, and high surface activity carbon temperature is 127.4 DEG C, for ensureing high surface activity carbon performance, should maintain temperature in storage tank and changing in scope little as far as possible.
Plain tube cools: Coefficient K value is 700W/ (m
2dEG C), it is 15 DEG C that circulating water imports and exports the temperature difference.Circulating water consumption m=2.56 × 10
7÷ 4.2 ÷ 15 ≈ 406350kg, chooses flow velocity 4m/s, and the caliber of calculating is d
2=406350 × 4 ÷ 3600 ÷ 8 ÷ 130 ÷ π ÷ 4, can obtain d=0.186m.Heat transfer temperature difference Δ T=[(127.4 ?20 ?15) ?(40 ?20)] ÷ ln [(127 ?20 ?15) ÷ (40 ?20)]=47.3 DEG C, Circulation pipe heat exchange area A=Q/ (K × Δ T
m)=(2.56 × 10
10÷ 3600 ÷ 8) ÷ (700 × 45.8 × 130)=0.21.Minimum pipe range l=0.21 ÷ π ÷ 0.186=0.35m.
Reinforcing pipe cools: Coefficient K value is 1300W/ (m
2dEG C), it is 35 DEG C that circulating water imports and exports the temperature difference.Circulating water consumption m=2.56 × 10
7÷ 4.2 ÷ 15 ≈ 174150kg, chooses flow velocity 4m/s, and the caliber of calculating is d
2=174150 × 4 ÷ 3600 ÷ 8 ÷ 130 ÷ π ÷ 4, can obtain d=0.12m.Heat transfer temperature difference Δ T=[(127.4 ?20 ?35) ?(40 ?20)] ÷ ln [(127 ?20 ?35) ÷ (40 ?20)]=40.7 DEG C, Circulation pipe heat exchange area A=Q/ (K × Δ T
m)=(2.56 × 10
10÷ 3600 ÷ 8) ÷ (1300 × 40.7 × 130)=0.13.Minimum pipe range l=0.13 ÷ π ÷ 0.12=0.33m.
Circulating pipe is evenly arranged in pipe, arranges 4 groups of circulating pipes in storage tank from outside to inside, and often organize circulating pipe and arrange with circular combination, interval 1m between each group, often each circulating pipe spacing half meter in group, concrete pattern is shown in Fig. 2,3.The heat transfer effect of contrast plain tube and reinforcing pipe can draw, when identical heat transfer effect, reinforcing pipe water consumption is less, and the caliber of water pipe and pipe range are all less, effectively decrease the impact on storage tank actual volume.So when equipment size is fixing, circulating pipe length and caliber are all constant, and now reinforcing pipe can reduce the temperature in storage tank within the shorter time, and the temperature variation of storage tank can be maintained in less scope when the identical water yield.
Claims (10)
1. for the ANG tank arrangement of micropolis peak regulation, it is characterized in that, comprise at least two ANG storage tanks and at least two pre-adsorption tanks; At least two ANG storage tanks are connected in parallel; At least two pre-adsorption tanks are connected in parallel, and each pre-adsorption tanks one end is connected in series rear in parallel with a valve, and parallel connected end connects the first on-line chromatograph detector, and are connected with high-pressure natural gas pipeline by the first valve; One end of each pre-adsorption tanks is connected in parallel after also connecting with another valve, and parallel connected end is by electric heater and the 3rd valve and high pressure N
2pipeline connects; The other end of each pre-adsorption tanks is connected with a valve rear respectively and connects, and the one end connect is connected with low pressure natural gas pipeline by valve; And the one end connect also is connected with the parallel connected end of valve with at least two ANG storage tanks by the second on-line chromatograph detector; First on-line chromatograph detector is connected with computer with the second on-line chromatograph detector;
Described ANG tank top has a global cycle water pipe downward, is divided into several circulating water intensify heat transfer pipe through top circular header, at the several circulating water intensify heat transfer pipe of tank bottom again through bottom circular header and be a global cycle water pipe; Be provided with screw thread in circulating pipe pipe, pipe is outer is provided with fin, and circulating water, at Bottomhole pressure, installs thermocouple in storage tank; ANG storage tank arranges multi-layer silk screen, and every layer of silk screen is provided with active carbon; Arrange silk screen layering in pre-adsorption tanks, sorbent is filled on silk screen.
2. according to claim 1 for the ANG tank arrangement of micropolis peak regulation, it is characterized in that, one end of described pre-adsorption tanks is provided with drain, and the other end is provided with sewage draining exit.
3. according to claim 1 for the ANG tank arrangement of micropolis peak regulation, it is characterized in that, described first on-line chromatograph detector and the second on-line chromatograph detector select GC910 type gas chromatographic detection instrument.
4. according to claim 1 for the ANG tank arrangement of micropolis peak regulation, it is characterized in that, described screw thread is female thread structure, pitch 16mm, Width of thread 8mm, height of thread 2mm.
5. according to claim 1 for the ANG tank arrangement of micropolis peak regulation, it is characterized in that, described fin is rectangular fin, and fin profile is of a size of 4mm × 16mm, spacing of fin is 14mm.
6. according to claim 1 for the ANG tank arrangement of micropolis peak regulation, it is characterized in that, described circulating pipe gateway arranges a thermometer respectively.
7. according to claim 1 for the ANG tank arrangement of micropolis peak regulation, it is characterized in that, every layer of silk screen spacing of described ANG storage tank is 1 ~ 1.5m.
8. according to claim 1 for the ANG tank arrangement of micropolis peak regulation, it is characterized in that, described active carbon is cylindrical shape, and diameter is 28 ~ 32mm, thickness is 10 ~ 50mm.
9. according to claim 1 for the ANG tank arrangement of micropolis peak regulation, it is characterized in that, described ANG storage tank selects low alloy steel as tank material, and tank volume is set to 200m
3, 500m
3, 3000m
3, 5000m
3or 10000m
3.
10. application rights requires the natural gas peak-shaving method of device described in 1, it is characterized in that, comprises inflation and deflation course:
1) gas replenishment process: when the force value of high-pressure gas is greater than setting value, the first valve open, high-pressure gas enters the first pre-adsorption tanks through the 6th valve and carries out decarburization, and the second pre-adsorption tanks are as subsequent use; Then the 8th valve, the 11 valve open, pretreated rock gas enters ANG storage tank and stores; When the first on-line chromatograph detector and the second on-line chromatograph detector detect that after pre-adsorption tanks, water and heavy hydrocarbons content difference are little, the pre-sorbent now in the first pre-adsorption tanks lost efficacy, and can not remove water contained in rock gas and heavy hydrocarbon; Close the 6th valve, the 8th valve, open the 7th valve, the 9th valve makes rock gas enter the second pre-adsorption tanks to carry out pre-absorption and dewater and heavy hydrocarbon, the first pre-adsorption tanks regenerate, two pre-adsorption tanks alternate runs;
Pre-adsorption tanks regenerative process: after the first pre-adsorption tanks absorption is full, opens emptying storage tank mouth after closing the 6th valve, the 8th valve, pressure of storage tank is discharged to a little higher than atmospheric pressure, then opens the 3rd valve, the 4th valve, high pressure N
2the pre-adsorption tanks passing into inefficacy after electric heater is heated to 200 DEG C regenerate, and make the water in pre-sorbent and heavy hydrocarbon desorption, recover the activity of pre-sorbent;
Deflation course: when the force value of low pressure natural gas pipes is lower than setting value, now air demand is not enough, needs peak adjusting device to carry out supplementary air feed; Open the second valve, the tenth valve, the 11 valve, close all the other valves; The force value of low-pressure pipe network is lower, now ANG storage tank be communicated with low-pressure pipe network after pressure reduce, automatically carry out desorption, the rock gas after desorption enters low pressure line after the second valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410566882.8A CN104406040B (en) | 2014-10-22 | 2014-10-22 | For ANG tank arrangement and the ANG peak regulating method thereof of micropolis peak regulation |
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Cited By (3)
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| CN105241975A (en) * | 2015-10-16 | 2016-01-13 | 华南理工大学 | Multifunctional ANG adsorbent testing device |
| CN105587995A (en) * | 2015-12-22 | 2016-05-18 | 重庆市高新技术产业开发区潞翔能源技术有限公司 | Device for peak-regulation adsorption storage and controllable release of biogas |
| CN111607442A (en) * | 2020-05-15 | 2020-09-01 | 重庆燃气集团股份有限公司 | Comprehensive energy utilization system for natural gas storage and peak regulation and storage and peak regulation method |
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| CN104406040B (en) | 2016-04-13 |
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