CN1931972A - Process of producing natural gas substitute with dimethyl ether as material - Google Patents
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Abstract
The present invention is process of producing natural gas substitute with dimethyl ether as material, and the natural gas substitute produced with dimethyl ether as material may be used to replace available fuel gas partially or completely. The natural gas substitute has high burning rate, environment friendship, reasonable performance/cost ratio and other advantages. It may produced with available apparatus in fuel gas producing enterprise, and has excellent application foreground.
Description
Technical field
The present invention relates to a kind of dme replacement liquid liquefied oil gas and the method for other combustion gas of adopting as the raw material production city gas.
Background technology
1, national energy present situation
The energy is the basis of the national economic development, and one of three big key issues that merit attention most in China's Economic development are exactly the energy structure problem.
Petroleum resources were seen only surplus 40 years from world's workable reserve mean level (ML) as the disposable energy.Specific to China, from 1993, become importer from oil exportiog countries, and this oil shortage situation is cumulative year after year situation.2000, China's imported crude oil 7,000 ten thousand t, processed oil 3,000 ten thousand t; By 2005, crude oil in China turnout 1.8 hundred million t, imported crude oil 1.3 hundred million t; The China's oil import volume will reach 2.0 hundred million t in 2010, and externally interdependency surpasses 50%.As seen, from now on China with increasing, if long-term so this energy utilization structure that is based upon the oil and natural gas import fully is dangerous, also is insecure, the countermeasure of solution is to carry out the Energy policy of diversification to the demand of the energy.
And on the other hand, in the explored disposable energy total amount of China, coal accounts for 96%, and annual output accounts for about 35% of world wide production, reaches 12～1,300,000,000 t.Aspect energy industry, the exploitation of coal and comprehensive utilization become the mainstay of Chinese national economy Sustainable development.Coal accounts for 63% in China's primary energy source consumptions in 2000, and world average only accounts for 25%, and absolute magnitude consumption is only second to the U.S., relief structures unreasonable.Therefore, adopting high effect cleaning coal technology as early as possible, is secondary energy with coal conversion, all has strategic importance for China's Economic development, environment protection and the eubiosis.
Along with the development of Coal Chemical Industry and carbon geochemistry, people more and more pay close attention to other Chemicals and the coal as an alternative new way of petroleum resources of coal except system synthetic ammonia and methyl alcohol.Such as make raw material production dme product with raw coal.Present reality is, the dimethylether industrial technology is progressively perfect, and the Coal Chemical Industry Poly-generation technology reaches its maturity, and dme has huge development potentiality as liquefied petroleum gas (LPG), diesel oil substitute and industrial chemicals etc.
Under the condition that the energy is extremely in short supply now, China's development dimethyl ether fuel is significant:
1. can substitute the import of partial liquefaction petroleum gas, reduce external energy interdependency, improve national energy security.2005, China's liquefied petroleum gas (LPG) consumption was that wherein import volume is 6,150,000 tons about 1,852 ten thousand tons, was big country of consumption in third place in the world and importer.
2. help western rich coal poverty-stricken area to develop the economy.Compare with simple output coal, produce dme and can prolong the coal industrial chain, help improving the added value of coal product, have vital role promoting the western rich coal regional economic development of China.
3. substitute diesel oil on a large scale, help to reduce the diesel vehicle pollutant emission, can bring into play tangible environment protection effect the with serious pollution large size city of Motor vehicles.In addition, can also alleviate the diesel oil relative deficiency that China's oil refining industry petrol and diesel oil causes than height.
4. on Infrastructure, has newcoming advantage.The Infrastructure of developed country is more complete, and the reconstruction work amount of Infrastructure is bigger when promoting alternative fuel.The popularity of China's civil LPG is still not high, and Infrastructure reconstruction problem is less, and the cost of fuel conversion is less relatively.So dme is particularly suitable for as an alternative that fuel develops on a large scale.
2, dme (DME) physico-chemical property
Dme is called for short DME, claims wooden ether, oxygen diformazan again, is called for short methyl ether traditionally, is the simplest a kind of aliphatic ether.Its molecular formula is C
2H
6O, molecular weight 46.07, structural formula are CH
3-O-CH
3, be a kind of colourless gas under the normal pressure, have slight ether fragrance.Relative density (20 ℃) is 0.666, fusing point-141.5 ℃, boiling point-24.9 ℃, vapour pressure is about 0.5MPa under the room temperature, similar to liquefied petroleum gas (LPG) (LPG) characteristic, have good compatibility, can be miscible with most of polarity and non-polar organic solvent, such as gasoline, tetracol phenixin, acetone, chlorobenzene and methyl acetate etc.Solubilized 3.7ml gas of dimethyl ether in 100ml water, after adding a little auxiliary, dme can dissolve each other with any ratio with water.The physico-chemical property of dme and other close material such as following table 1.
Table 1: the physicochemical property of dme and other close material
| Physico-chemical property | Dme (DME) | Diesel oil | Propane | Normal butane | Methane | Methyl alcohol |
| Chemical formula | (CH 3-O-CH 3) | (CnH 1.8n) | (C 3H 8) | iC 4H 10 | (CH 4) | (CH 3-OH) |
| Relative molecular mass | 46 | 190～220 | 44 | 58 | 16 | 32 |
| Liquid phase Lower heat value MJ/kg (kcal/kg) | 28.8 (6888) | 42.5 (10150) | 46.36 (11072) | 45.71 (10918) | 50.06 (11957) | 19.5 (4800) |
| Gas phase Lower heat value MJ/m 3(kcal/m 3) | 64.58 (15425) | 93.18 (22256) | 123.57 (29513) | 35.91 (8578) | ||
| Liquid viscosity kg/m-s | 0.15 | 2～4 | 0.15 | - | - | |
| Fluid density kg/m 3 | 668 | 840 | 501 | 465 | 790 | |
| Gas density kg/m 3 | 2.24 | 2.0102 | 2.703 | 0.7174 | ||
| Cetane value | ＞55 | 38～53 | ＜10 | ＜10 | 5 | |
| Chemically correct fuel kg/kg | 9.0 | 14.6 | 15.6 | 17.2 | 6.5 | |
| Theoretical air requirement m 3/m 3 | 14.28 | 23.8 | 31.0 | 9.52 | ||
| Limits of explosion (volume fraction %) | 3.5～17.0 | 2.1～9.5 | 1.5～8.5 | 5.0～15.0 | 5.5～36 | |
| Boiling point ℃ | -25 | 180～360 | -43 | -162 | 65 | |
| Spontaneous ignition temperature ℃ | 235 | 250 | 470 | 650 | 450 | |
| Theoretical combustion temperature ℃ | 2250 | 2055 | 2055 | 2043 | ||
| Oxygen level % | 34.8 | 50.0 | ||||
| Vapour pressure MPa in the time of 20 ℃ | 0.53 | 0.83 | 0.21 | Supercritical state |
Dme is inflammable, and flame is slightly bright during burning, and the combustion heat (gaseous state) is 1455kJ/mol, and theoretical calorific value is about 64% of petrol and diesel oil, uses calorific value and is equivalent to about 80% of petrol and diesel oil.The dme cetane value is higher than diesel oil greater than 55, is expected to as the diesel oil substitute.Conventional harmful gas emission is lower than petrol and diesel oil during burning, helps environment protection.DME has inertia under the normal temperature, is difficult for autoxidation, no burn into non-carcinogenesis, but under radiation or heating condition, can resolve into methane, ethane, formaldehyde etc.
The saturation vapour pressure of dme is lower than liquefied petroleum gas (LPG), and therefore, it is more safer than liquefied petroleum gas (LPG) to store transportation, because oxygen level own is up to 34.8%, so combustionproperty is good especially, the thermo-efficiency height does not have residue, no black smoke in the combustion processes, and CO, NO discharge capacity are low; Dme also can mix liquefied petroleum gas (LPG), coal gas or Sweet natural gas multifuel combustion and can improve heat, the directly fuel of the liquefied petroleum gas (LPG) use as an alternative of component concentration 〉=95% dme.So it may be a kind of ideal clean fuel that replaces liquefied petroleum gas (LPG).In addition, dme also can be used as industrial chemicals, is mainly used in to make spray paint, sterilant, air aromatic, hair jelly, rust-preventive agent and lubricant etc.
3, dme purposes
The dme purposes is very extensive, can be used for the synthetic of many fine chemicals, and its maximum purposes then is to be used as fuel as a kind of clean energy, simultaneously, also is the ideal fuels of diesel motor.It is described as " new forms of energy of 21st century ", broad market prospect and development space.
Existing dme utilizes in the technology, generally be with dme with after LPG mixes, supply as domestic fuel in bottled mode, although this technology is very ripe, have its tangible drawback: DME to replace LPG with low ratio, usage quantity is limited; And it is bigger that the product calorific value reduces amplitude, influences user benefit; Compare with imported L PG (bottled), vapour pressure descends, and vaporization ability weakens.
Summary of the invention
The object of the present invention is to provide a kind of by raw material substitution, can effectively reduce gas production cost, the Technology of improving the gas appliance combustionproperty and method.Promptly adopt dme (DME) to substitute or part replacement liquid liquefied oil gas (LPG), other inflammable gas as raw material, produce meet " GB " " artificial coal gas " (GB/T13612-93) in the concrete technology of 10T～13T Sweet natural gas of requiring of quality product.
The present invention is achieved through the following technical solutions with dme and produces the target of 10～13T for Sweet natural gas:
A kind of is the method for raw material production for Sweet natural gas with the dme, it is characterized in that may further comprise the steps: 1. the liquid phase dme is delivered to heating and gasifying; 2. the back dme that will gasify is delivered in the mixing tank and is mixed with air.
A kind of is the method for raw material production for Sweet natural gas with the dme, it is characterized in that may further comprise the steps: 1. mix after liquid phase DME, LPG in the different high pressure storage tanks delivers to heating and gasifying respectively with being stored in respectively, percentage calculation by volume, the content of DME: 0＜DME≤100% wherein, the content of LPG: 0≤LPG＜100%; 2. DME and LPG deliver in the mixing tank and are mixed with air after will gasifying.
A kind of is the method for raw material production for Sweet natural gas with the dme, it is characterized in that may further comprise the steps: 1. mixing is stored in liquid phase DME and the gasification of LPG mixing raw material in the same high pressure storage tank, the mass content of DME in this liquid-phase mixing raw material: 0＜DME≤100%, the mass content of LPG: 0≤LPG＜100%; 2. back " DME+LPG " mixing raw material that will gasify is delivered in the mixing tank and is mixed with air.
A kind of is the method for raw material production for Sweet natural gas with the dme, it is characterized in that may further comprise the steps: 1. liquid phase DME, LPG gasification back is delivered to respectively in the combustion gas premixed device with other normal temperature inflammable gas and mixed, percentage calculation by volume, the content of DME: 0＜DME≤100% wherein, the content of LPG: 0≤LPG＜100%, the content of normal temperature inflammable gas: 0≤normal temperature inflammable gas＜100%; 2. DME, LPG and the mixed gas of normal temperature inflammable gas of step in 1. delivered in the mixing tank and be mixed with air.
A kind of is the method for raw material production for Sweet natural gas with the dme, it is characterized in that may further comprise the steps: 1. liquefied petroleum gas (LPG) is delivered to heating and gasifying, direct and the high-temperature combustible gas body heat exchange gasification with liquid phase dme atomizing back simultaneously, enter mixing gasifying and mixing in the combustion gas premixed device more jointly, percentage calculation by volume, the content of DME: 0＜DME≤100% wherein, the content of high-temperature combustible gas body: 0≤high-temperature combustible gas body＜100%, the content of LPG: 0≤LPG＜100%; 2. LPG, DME and the mixed gas of high-temperature combustible gas body of step in 1. delivered in the mixing tank and be mixed with air.
The present invention is that raw material partly replaces or full replacement liquid liquefied oil gas is produced city gas with the dme, such as producing 10T for Sweet natural gas (being commonly called as the empty gas that mixes), have advantages such as rate of combustion height, good environmental protection, cost performance be reasonable, also can be that raw material partly replaces or alternative entirely other inflammable gas with the dme, produce qualified 10～13T for gas product.
The present invention is intended to make full use of the existing production equipment of gas enterprise, and the plant modification amount is minimum, have that reduced investment, construction period are short, device start quick, easy to operate, characteristics such as safe reliability height, raw material conversion are flexible.Be fit to existing gas production enterprise and reduce the combustion gas production cost, reach the purpose that improves business economic and social benefit to increase economic efficiency, to enhance production capacities to remedy original source of the gas deficiency, to implement the raw material diversification to improve the safe reliability of air feed.
The technology of the present invention is on the leading domestic level, and at the energy and gas industry good popularizing application prospect is arranged, and can produce tangible economic benefit and social benefit.Gas making device adopts raw material supply multi-source route, to reasonable adjustment energy utilization structure, remedy domestic oil gas strategic reserves and lack, improve the airing system security and stability, its far-reaching politics, economy and social effect is arranged.
Description of drawings
Accompanying drawing 1:LPG mixes air and produces 10T for the Sweet natural gas process flow sheet.
Accompanying drawing 2:DME substitutes LPG fully and mixes air production 10T for the Sweet natural gas process flow sheet.
Accompanying drawing 3a:DME partly substitutes LPG (under the liquid phase state, classification stores) and mixes air production 10T for the Sweet natural gas process flow sheet.
Accompanying drawing 3b:DME partly substitutes LPG (under the liquid phase state, mixing storing) and mixes air production 10T for the Sweet natural gas process flow sheet.
Accompanying drawing 4b:DME and LPG and other high-temperature fuel gas mix air and produce 10～13T for the Sweet natural gas process flow sheet.
Specific embodiment
The complete replacement liquid liquefied oil gas of embodiment 1. dme is produced 10T for Sweet natural gas
With port, Fanyu, Guangzhou China combustion gas company limited production equipment is that example describes.
(1) the original device of port China combustion gas company limited is that LPG mixes the production equipment of AIR production 10T for Sweet natural gas, original LPG mixes the process flow sheet of air production equipment and sees accompanying drawing 1 (LPG mixes air and produces 10T for the Sweet natural gas process flow sheet), use imported L PG as raw material, the LPG typical component is (gaseous phase volume): C
340%, C
460%, correlation parameter such as following table 2.
Table 2: port China's combustion gas company limited's raw material (imported L PG) main ingredient and burning performance parameter
| Project | Propane | Butane | Superior calorific value | Lower heat value | The white index of high-order China | Combustion potential | Gas density (kg/Nm 3) |
| MJ/Nm 3(kcal/Nm 3) | |||||||
| Parameter (volume %) | 40 | 60 | 120.76 (28843) | 111.41 (26610) | 88.17 (21059) | 43.80 | 2.4259 |
LPG gasification back is mixed the correlation parameter of the product of producing (10T is for Sweet natural gas) such as following table 3 by a certain percentage with AIR.Blending ratio is LPG: AIR=47.59%: 52.43%, and the Lower heat value during 15 ℃ of mixed gass is 50.0MJ/Nm
3
Table 3: port China's combustion gas company limited's product (10T is for Sweet natural gas) main ingredient and burning performance parameter
| Project | Propane | Butane | Oxygen | Nitrogen | Superior calorific value | Lower heat value | The white index of high-order China | Combustion potential | Gas density (kg/Nm 3) |
| MJ/Nm 3(kcal/Nm 3) | |||||||||
| Parameter (volume %) | 19.03 | 28.54 | 11.01 | 41.42 | 57.45 (13722) | 53.00 (12659) | 48.30 (11536) | 39.71 | 1.8293 |
| " GB " 10T combustion of natural gas characteristic parameter scope: white index W: the 9832～11291kcal/m of China 3 | |||||||||
(2) after raw material was replaced, DME mixed air and produces technical process and the explanation thereof of 10T for Sweet natural gas
Substitute LPG production 10T fully with DME and see accompanying drawing 2 (DME substitutes LPG fully and mixes air production 10T for the Sweet natural gas process flow sheet), can make full use of existing LPG and mix the production equipment of AIR production 10T for Sweet natural gas for the Sweet natural gas process flow sheet.
Be stored in DME in the high pressure storage tank by the pressurization of hydrocarbon liquid phase pump after, enter gasification installation and heating medium (hot water, steam, electrically heated etc.) heat exchange and gasified, be mixed by a certain percentage with passing through the AIR that purifying treatment crosses then, produce 10T for Sweet natural gas.
The blending ratio of DME and AIR depends on that the calorific value of product and burning performance parameter (mainly being the white exponential sum combustion potential index of China) must meet " GB " requirement, Theoretical Calculation can draw both mixing proportions, and " calorific value control loop (the calorific value coarse adjustment) " and " calorific value regulating loop (fine setting) " that are provided with by computer system are achieved.
Intend substituting dme (DME) basic parameter such as the following table 4 of LPG as raw material
Table 4: gas phase DME major ingredient and burning performance parameter
| Project | Dme | Superior calorific value | Lower heat value | The white index of high-order China | Combustion potential | Gas density (kg/Nm 3) |
| MJ/Nm 3(kcal/Nm 3) | ||||||
| Parameter (%) | 100 | 69.08 (16500) | 64.58 (15425) | 52.49 (12536) | 45.59 | 2.24 |
After dme substituted LPG fully, (AIR) was mixed with corresponding proportion with air, produced main ingredient and burning performance parameter such as the following table 5 of 10T for gas product.
Table 5:DME mixes the 10T of air production for Sweet natural gas major ingredient and burning performance parameter
| Project | Dme | Oxygen | Nitrogen | Superior calorific value | Lower heat value | The white index of high-order China | Combustion potential | Gas density (kg/Nm 3) |
| MJ/Nm 3(kcal/Nm 3) | ||||||||
| Parameter (volume %) | 82.07 | 3.77 | 14.17 | 56.69 (13541) | 53.00 (12659) | 44.82 (10704) | 41.90 | 2.0693 |
| " GB " 10T combustion of natural gas characteristic parameter scope: white index W: the 9832～11291kcal/m of China 3 | ||||||||
(3) product quality indicator and safe performance indexes analysis
1. quality product and effect analysis
Contrast " GB " requires and the empty gas product index that mixes of LPG, dme replaces the product 10T of liquefied petroleum gas (LPG) (LPG) back production for Sweet natural gas (the empty gas that mixes) fully, the white index of its China, combustion potential all change not quite, can meet " GB " every requirement fully, can be alternative fully.
2. safety Analysis
Through calculating, the aerial limits of explosion of LPG is: 1.0～10.0%, and the aerial limits of explosion of DME is: 3.5～17.0%.Require according to " GB " " Code for design of city gas engineering " (version in 2002): for guaranteeing safety, during entrained air, must guarantee " volume fraction of inflammable gas should be higher than 2 times of its upper explosive limit " in the inflammable gas.
Hence one can see that, behind the entrained air, needs only the DME volume fraction greater than 34% in DME, and then mixed gas is a safe gas.
In this example, O
2Content is 3.77%, and promptly air content 18%, and the DME volume fraction is 82%, be higher than 34% far away, satisfy the requirement of " be higher than its upper explosive limit 2 times " fully, therefore, dme replaces the product 10T that produces behind the LPG can meet the demands for the safety performance of Sweet natural gas (the empty gas that mixes) fully.
Embodiment 2. dme part replacement liquid liquefied oil gas are produced 10T for Sweet natural gas (DME and LPG liquid phase classification storage, gasification back hybrid mode)
Be that example describes with port, Fanyu, Guangzhou China combustion gas company limited production equipment equally.
1. after raw material was partly replaced, " DME+LPG " mixed air and produces the technical process and the explanation thereof of 10T for Sweet natural gas
See accompanying drawing 3a (" DME+LPG " mixes air and produce 10T for the Sweet natural gas process flow sheet) to produce 10T behind the partly alternative LPG of DME for the Sweet natural gas process flow sheet.
Be stored in DME and LPG in the high pressure storage tank respectively, after hydrocarbon liquid phase pump pressurization separately, the gasification installation and heating medium (hot water, steam, the electrically heated etc.) heat exchange that enter are separately gasified, then, these two kinds of combustion gas are mixed by a certain percentage with the AIR that purifying treatment is crossed simultaneously, produce 10T for Sweet natural gas.
The blending ratio of DME and LPG is adjustable arbitrarily, wherein 0＜DME≤100%, 0≤LPG＜100%; The AIR mixing proportion depends on that then the calorific value of product and burning performance parameter (the white index of China, combustion potential) must meet " GB " requirement, Theoretical Calculation can draw both mixing proportions, and " calorific value control loop (the calorific value coarse adjustment) " and " calorific value regulating loop (fine setting) " that are provided with by computer system are achieved.
2. original device is that LPG mixes the production equipment of AIR production 10T for Sweet natural gas, uses imported L PG as raw material, and the LPG typical component is (gaseous phase volume): C
340%, C
460%, table 2 on the correlation parameter.
3. (it is 50%: 50% that this example is set volume fraction), the correlation parameter following table 6 of mixing the back raw material are mixed in DME gasification back with part gas phase LPG.
Table 6:DME and LPG mixed ratio are 50%: 50% o'clock correlation parameter
| Project | Dme | Propane | Butane | Superior calorific value | Lower heat value | The white index of high-order China | Combustion potential | Gas density (kg/Nm 3) |
| MJ/Nm 3(kcal/Nm 3) | ||||||||
| Parameter (volume %) | 50.0 | 20.0 | 30.0 | 94.92 (22671) | 88.00 (21018) | 70.67 (16878) | 44.67 | 2.3329 |
4. the mixing raw material (" DME+LPG ") after the gasification is mixed the correlation parameter of the product of producing (10T is for Sweet natural gas) such as following table 7 by a certain percentage with AIR.Blending ratio is " DME+LPG ": AIR=60.23%: 39.77%, and the Lower heat value during 15 ℃ of mixed gass is 50.0MJ/Nm
3(12659kcal/Nm
3).
Table 7:(DME+LPG) mixes the 10T of air production for Sweet natural gas major ingredient and burning performance parameter
| Project | Dme | Propane | Butane | Oxygen | Nitrogen | Superior calorific value | Lower heat value | The white index of high-order China | Combustion potential | Gas density (kg/Nm 3) |
| MJ/Nm 3(kcal/Nm 3) | ||||||||||
| Parameter (volume %) | 30.12 | 12.05 | 18.07 | 8.35 | 31.42 | 57.17 (13655) | 53.00 (12659) | 46.95 (11213) | 40.85 | 1.9173 |
| " GB " 10T combustion of natural gas characteristic parameter scope: white index W: the 9832～11291kcal/m of China 3 | ||||||||||
5. product quality indicator and safe performance indexes analysis
A) quality product and effect analysis
Contrast " GB " requirement and above-mentioned DME partly substitute the product index behind the LPG, the product 10T of (two kinds of fuel adopt gasification back and air blending mode respectively) production is for Sweet natural gas (the empty gas that mixes) behind the partly alternative LPG of dme, indexs such as the white index of its China, combustion potential all can meet " GB " every requirement fully, undoubtedly, DME can partly substitute LPG.
B) safety Analysis
Through calculating, the aerial limits of explosion of LPG, DME is respectively: 1.0～10.0%, 3.5～17.0%, and " DME+LPG " volume fraction is 50%: 50% o'clock, its aerial limits of explosion is 1.8%～14.0%.Require according to " GB " " Code for design of city gas engineering " (version in 2002): for guaranteeing safety, during entrained air, must guarantee " volume fraction of inflammable gas should be higher than 2 times of its upper explosive limit " in the inflammable gas.
Hence one can see that, behind the entrained air, needs only " DME+LPG " volume fraction greater than 28% in " DME+LPG ", and then mixed gas is a safe gas.
In this example, O
2Content is 8.35%, it is air content 39.8% in the product, " DME+LPG " volume fraction is 60.2%, be higher than 28% far away, satisfy the requirement of " be higher than its upper explosive limit 2 times " fully, therefore, dme partly replaces the product 10T that produces behind the LPG can meet the demands for the safety performance of Sweet natural gas (the empty gas that mixes).
Embodiment 3. dme part replacement liquid liquefied oil gas are produced 10T for Sweet natural gas (DME and the storage of LPG liquid-phase mixing, while gasification mode)
Also be to be that example describes with port, Fanyu, Guangzhou China combustion gas company limited production equipment.
Except that the raw material storage part, the production system technical process is identical with " DME and LPG liquid phase classification storage, gasification back hybrid mode " flow process, and quality product and safe performance indexes are just the same.Accompanying drawing 3b is that DME partly substitutes the mixed air production 10T of LPG (under the liquid phase state, mixing storing) for the Sweet natural gas process flow sheet.
Be stored in DME and LPG mixing raw material in the high pressure storage tank, enter gasification installation after pressurizeing by the hydrocarbon liquid phase pump and the thermal source heat exchange is gasified, the AIR that crosses with purifying treatment is mixed by a certain percentage again, produces 10T for Sweet natural gas.The gasification temperature of the purer LPG of gasification temperature of " DME+LPG " mixing raw material is slightly high, when therefore in gasification installation, mixing raw material being carried out heating and gasifying, and 0～10 ℃ of the temperature raising when the heating medium temperature gasify than LPG.
The blending ratio of DME and LPG is adjustable arbitrarily, the mass content of DME in this liquid-phase mixing raw material: 0＜DME≤100%, the mass content of LPG: 0≤LPG＜100%; " DME+LPG " depends on that with the AIR blending ratio calorific value of product and burning performance parameter (the white index of China, combustion potential) must meet " GB " requirement, Theoretical Calculation can draw both mixing proportions, and " calorific value control loop (the calorific value coarse adjustment) " and " calorific value regulating loop (fine setting) " that are provided with by computer system are achieved.
Embodiment 4.DME and LPG and other combustion gas mix air and produce 10～13T for Sweet natural gas
Accompanying drawing 4a, 4b are respectively DME and LPG and other normal temperature combustion gas and mix air and produce 10～13T and mix air production 10～13T for the Sweet natural gas process flow sheet for Sweet natural gas process flow sheet and DME with LPG and other high-temperature fuel gas.
1) DME and normal temperature inflammable gas are mixed and produce 10～13T for Sweet natural gas
Be stored in DME and LPG in the high pressure storage tank respectively, after hydrocarbon liquid phase pump pressurization separately, the gasification installation and heating medium (hot water, steam, the electrically heated etc.) heat exchange that enter are separately gasified, simultaneously with other various inflammable gass (such as, water-gas, coke-oven gas, oil gas, biogas, biogas, Sweet natural gas, coal-seam gas, lighter hydrocarbons gas etc.Can be a kind, also can be multiple) enter in the combustion gas premixed device and mix, afterwards, the AIR that crosses with purifying treatment is mixed by a certain percentage again, produces 10T～13T for Sweet natural gas.
Blending ratio between DME and LPG and other various inflammable gass is adjustable arbitrarily, wherein 0＜DME≤100%; The AIR mixing proportion depends on that then the calorific value of product and burning performance parameter (the white index of China, combustion potential) must meet " GB " requirement, Theoretical Calculation can draw both mixing proportions, and " calorific value control loop (the calorific value coarse adjustment) " and " calorific value regulating loop (fine setting) " that are provided with by computer system are achieved.
2) DME and high-temperature combustible gas body are mixed and produce 10～13T for Sweet natural gas
For saving the energy, DME in the high pressure storage tank is without gasification installation, but by after the liquid phase pump pressurization, by means of atomizing nozzle and high-temperature combustible gas body (such as, water-gas, coke-oven gas, oil gas etc.) the direct heat exchange gasification, enter with gas phase LPG again and mix in the combustion gas premixed device, afterwards, the AIR that crosses with purifying treatment is mixed by a certain percentage again, produces 10T～13T Sweet natural gas.
Blending ratio between DME and LPG and other various inflammable gass is adjustable arbitrarily, wherein 0＜DME≤100%; The AIR mixing proportion then depends on the calorific value and the burning performance parameter (the white index of China, combustion potential) of product, is guaranteeing can to calculate the mixing proportion of AIR under all qualified prerequisite of the above-mentioned two class indexs of product." calorific value control loop (calorific value coarse adjustment) " and " calorific value is regulated (fine setting), can guarantee product " GB " requirement by the computer system setting.
Conclusion
Analyze and put into practice and all show:
1. dme (DME) can substitute fully, also can partly substitute LPG by arbitrary proportion, and production meets the 10T of " GB " requirement for Sweet natural gas;
When 2. DME partly substitutes LPG, liquid phase classification storage, gas phase hybrid mode can be taked, also the liquid-phase mixing mode can be taked.Although the dual mode technical process has difference, quality product is just the same;
3. DME substitutes or partly substitutes LPG fully and makes raw material, and quality, the safety performance of its product meet the requirements fully;
4. gas phase DME mixes by a certain percentage with other normal temperature or high-temperature combustible gas body, can produce meet that " GB " require 12,13T is for Sweet natural gas, to increase production capacity or to be used for the gas ductwork peak regulation.
As long as 5. possess price advantage, domestic combustion gas market dme demand is huge.Adopting the blowing model of " dme+air+Sweet natural gas+other combustion gas ", is to solve very real, effectively way of source of the gas breach;
6. Sweet natural gas is the powerful rival of dme.And its price rigidity is not strong, restricted by methyl alcohol;
7. present, people lack truly understanding to dme, do not obtain understanding with the calorific value comparison problem that waits of other energy, have the consumption mistaken ideas.
8. the microcorrosion of dme can not be ignored the influence of LPG system.
Claims (8)
1. one kind is the method for raw material production for Sweet natural gas with the dme, it is characterized in that may further comprise the steps: 1. the liquid phase dme is delivered to heating and gasifying; 2. the back dme that will gasify is delivered in the mixing tank and is mixed with air.
2. one kind is the method for raw material production for Sweet natural gas with the dme, it is characterized in that may further comprise the steps: 1. the liquid phase dme, the liquefied petroleum gas (LPG) that are stored in respectively in the different high pressure storage tanks are mixed after delivering to heating and gasifying respectively, percentage calculation by volume, the content of dme wherein: 0＜dme≤100%, the content of liquefied petroleum gas (LPG): 0≤liquefied petroleum gas (LPG)＜100%; 2. back dme and the liquefied petroleum gas (LPG) of will gasifying delivered in the mixing tank and is mixed with air.
3. one kind is the method for raw material production for Sweet natural gas with the dme, it is characterized in that may further comprise the steps: 1. mixing is stored in liquid phase dme and the gasification of liquefied petroleum gas (LPG) mixing raw material in the same high pressure storage tank, the mass content of dme in this liquid-phase mixing raw material: 0＜dme≤100%, the mass content of liquefied petroleum gas (LPG): 0≤liquefied petroleum gas (LPG)＜100%; " dme+liquefied petroleum gas (LPG) " mixing raw material that 2. will gasify is delivered in the mixing tank and is mixed with air.
4. according to claim 3 is the method for raw material production for Sweet natural gas with the dme, it is characterized in that: described step 1. in, to being stored in liquid phase dme in the same high pressure storage tank and liquefied petroleum gas (LPG) mixing raw material when carrying out heating and gasifying, the temperature of heating medium temperature during than gasifying liquefied petroleum gas improves 0～10 ℃.
5. one kind is the method for raw material production for Sweet natural gas with the dme, it is characterized in that may further comprise the steps: 1. mix with delivering to respectively in the combustion gas premixed device with other normal temperature inflammable gas behind liquid phase dme, the gasifying liquefied petroleum gas, percentage calculation by volume, the content of dme wherein: 0＜dme≤100%, the content of liquefied petroleum gas (LPG): 0≤liquefied petroleum gas (LPG)＜100%, the content of normal temperature inflammable gas: 0≤normal temperature inflammable gas＜100%; 2. step " dme+liquefied petroleum gas (LPG)+normal temperature inflammable gas " mixed gas in is 1. delivered in the mixing tank and is mixed with air.
6. according to claim 5 is the method for raw material production for Sweet natural gas with the dme, it is characterized in that: described normal temperature inflammable gas is one or more the mixing in water-gas, coke-oven gas, oil gas, biogas, biogas, Sweet natural gas, coal-seam gas or the lighter hydrocarbons gas.
7. one kind is the method for raw material production for Sweet natural gas with the dme, it is characterized in that may further comprise the steps: 1. liquefied petroleum gas (LPG) is delivered to heating and gasifying, direct and the high-temperature combustible gas body heat exchange gasification with liquid phase dme atomizing back simultaneously, enter mixing gasifying and mixing in the combustion gas premixed device more jointly, percentage calculation by volume, the content of dme wherein: 0＜dme≤100%, the content of high-temperature combustible gas body: 0≤high-temperature combustible gas body＜100%, the content of liquefied petroleum gas (LPG): 0≤liquefied petroleum gas (LPG)＜100%; 2. step " dme+liquefied petroleum gas (LPG)+high-temperature combustible gas body " mixed gas in is 1. delivered in the mixing tank and is mixed with air.
8. according to claim 7 is the method for raw material production for Sweet natural gas with the dme, it is characterized in that: described high-temperature combustible gas body is one or more the mixing in water-gas, coke-oven gas, oil gas or the lighter hydrocarbons gas.
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Cited By (7)
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| CN101186846A (en) * | 2007-12-11 | 2008-05-28 | 上海浦东煤气制气有限公司 | Artificial combustion gas |
| CN102022747A (en) * | 2010-11-18 | 2011-04-20 | 昆明龙鑫洋塑料防腐设备制造有限责任公司 | Application of dimethyl ether in industrial boiler and gas supply device of dimethyl ether |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101186846A (en) * | 2007-12-11 | 2008-05-28 | 上海浦东煤气制气有限公司 | Artificial combustion gas |
| CN101186846B (en) * | 2007-12-11 | 2013-07-10 | 上海浦东煤气制气有限公司 | Artificial combustion gas |
| CN102022747A (en) * | 2010-11-18 | 2011-04-20 | 昆明龙鑫洋塑料防腐设备制造有限责任公司 | Application of dimethyl ether in industrial boiler and gas supply device of dimethyl ether |
| CN102022747B (en) * | 2010-11-18 | 2013-07-17 | 昆明龙鑫洋塑料防腐设备制造有限责任公司 | Application of dimethyl ether in industrial boiler and gas supply device of dimethyl ether |
| CN104164267A (en) * | 2014-08-14 | 2014-11-26 | 重庆大学 | Method for supplementing biogas by virtue of liquefied natural gas (LNG) blended with air |
| CN104164267B (en) * | 2014-08-14 | 2016-01-13 | 重庆大学 | A kind of natural gas liquids dilution air supplies the method for biogas |
| CN108138063A (en) * | 2015-10-26 | 2018-06-08 | 国际壳牌研究有限公司 | Fluid comprising methane and tracer and manufacture its method with and application thereof |
| CN108138063B (en) * | 2015-10-26 | 2020-08-11 | 国际壳牌研究有限公司 | Fluid comprising methane and a tracer, method for producing same and use thereof |
| CN107760403A (en) * | 2017-10-25 | 2018-03-06 | 刘宗蒲 | A kind of low ethanol content liquefied petroleum gas and preparation method thereof |
| CN107760403B (en) * | 2017-10-25 | 2022-04-15 | 刘宗蒲 | Liquefied petroleum gas with low ethanol content and preparation method thereof |
| CN110205172A (en) * | 2019-03-19 | 2019-09-06 | 武威福民汇科技开发有限公司 | A kind of mixed clean fuel of gas |
| CN112126485A (en) * | 2020-09-14 | 2020-12-25 | 大连派思燃气设备有限公司 | Gas mixing system for power station |
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