CN1051797C - Method for preparation of mixed gas of light hydrocarbon gas and coal gas - Google Patents
Method for preparation of mixed gas of light hydrocarbon gas and coal gas Download PDFInfo
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- CN1051797C CN1051797C CN97125215A CN97125215A CN1051797C CN 1051797 C CN1051797 C CN 1051797C CN 97125215 A CN97125215 A CN 97125215A CN 97125215 A CN97125215 A CN 97125215A CN 1051797 C CN1051797 C CN 1051797C
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Abstract
The present invention relates to a preparation method for mixed gas of light hydrocarbon gasified fuel gas and coal gas, which orderly comprises the steps of light hydrocarbon filtration, light hydrocarbon pressurization, atomization, heating operation, gasification, mixed preparation and conveying distribution, wherein in the mixed preparation, light hydrocarbon fuel gas and coal gas are metered and mixed in a gas mixing chamber according to a proportion, and the light hydrocarbon fuel gas and the coal gas are mixed according to the proportion through a venturi gas mixing chamber. The present invention has the main advantages that the raw material sources of the light hydrocarbon fuel gas and the coal gas are wide, and various kinds of mixed fuel gas of which heat value is from 4000 to 16000 kal/m<3> in accordance with Chinese fuel gas classification standards can be prepared. The mixed gas is suitable for town and city pipelines, and the dewing phenomenon of the pipeline transportation in winter and cold areas does not exist.
Description
The present invention relates to the producing gas method of combustion gas, especially about the producing gas method that is mixed of a kind of gas of light hydrocarbon and gas maked coal.
Calorific value is no more than 1000kcal/m
3Blast furnace gas or fertilizer plant's producer tail gas because of can not using as combustion gas, the general employing directly of factory discharged, and causes serious atmospheric pollution.According to incompletely statistics, the existing small fertilizer plant of China is as many as thousands of families, if these low-calorie gas maked coales are used, lighter hydrocarbons (light naphtha) gasification burning of these low-calorie gas maked coales and a kind of high heating value is mixed, make the Sweet natural gas or the artificial gas that meet China's classifying gas characteristic requirement, especially being mixed into calorific value is 4000-5000kcal/m
3Air mixture, more adapt to cities and towns pipe gas usefulness, can solve up to ten million residents' the problem that uses.
The producing gas method that is mixed that the purpose of this invention is to provide a kind of gas of light hydrocarbon and gas maked coal.Utilize the low-calorie gas maked coal and the gas of light hydrocarbon of high heating value to be mixed and make the combustion gas of different calorific values.
The producing gas method key step that is mixed of gas of light hydrocarbon of the present invention and gas maked coal is followed successively by:
(1) filter and will obtain boiling point 26-82 ℃ mixed light-hydrocarbon from petrochemical enterprise and filter through 120 order strainers, stand-by behind the removal mechanical impurity;
(2) gasification mixed light-hydrocarbon after filtering pressurizes and atomizes through nozzle spray, and the lighter hydrocarbons that will atomize again make it to be gasificated into rapidly the high heating value combustion gas of band pressure at spacer well heater internal heating;
(3) be mixed two kinds of modes that are mixed can be arranged:
(a) band presses high heating value light-hydrocarbon gas and band to force down the calorific value gas maked coal respectively by the under meter metering, enters the air mixture that is mixed into required calorific value in the mixing chamber by volume required content ratio;
(b) will be with pressure high heating value light-hydrocarbon gas through the Venturi central-injection, by nozzle diameter size control emitted dose, the low heat value gas maked coal that drives in the ejection cavity around produces injection power, and the caliber size of control ejection cavity makes gas maked coal and light-hydrocarbon gas be mixed into the air mixture of setting calorific value by the certain volume content ratio in mixed air cavity;
(4) transmission ﹠ distribution adopt low pressure one-level transmission ﹠ distribution by pipeline, or adopt the long distance of pressurization to carry.
The pressure of lighter hydrocarbons pressurization is generally 3-5kg/cm in the gasification step
2Used spacer well heater is board-like, shell and tube or spiral spacer well heater in the gasification step, and its Heating temperature is 95-120 ℃.The gas maked coal that is adopted in the air mixture can be coke-oven gas, water-gas, semi-water gas, producer gas, blast furnace gas, mixed gas or fertilizer plant's producer tail gas etc.It is 200-500mm H that transmission ﹠ distribution adopt low pressure
2The one-level transmission ﹠ distribution of O, or employing is pressurised into 0.1-0.3kg/cm
2Long distance carry.Venturi central nozzle bore is 3.4-36.9mm, and the ejection cavity caliber is 30-350mm.
Technical process of the present invention as depicted in figs. 1 and 2.
The raw material of gas of light hydrocarbon of the present invention is boiling point 26-82 ℃ lighter hydrocarbons, it is a kind of hydrocarbon polymer, form by alkene and alkane, it is very wide to originate, for example in the petroleum chemical plant ethylene project pay product, the fraction of refinery, heavy oil and residual oil catalysis, cracking gained pay association condensate oil in product and the wet oil gas field, this raw material is liquid at normal temperatures, dew-point temperature height, liquefaction easily.Another kind of gas raw material is low-calorie gas maked coal, for example coke-oven gas, water-gas, semi-water gas, producer gas, blast furnace gas, mixed gas or fertilizer plant's producer tail gas etc.Gas of light hydrocarbon and coal agent gas can be mixed with the air mixture of required calorific value according to different occasions and operating mode needs, tabulate 1 as follows.
Calorific value and property list that table 1 lighter hydrocarbons and various gas maked coal are mixed
| Lighter hydrocarbons (volume %) coke-oven gas (volume %) | 8 92 | 11 89 | 15 85 | 20 80 | 25 75 | 30 70 |
| Air mixture (kcal/m 3) calorific value (MJ/m 3) | 7766 32.46 | 8958 37.44 | 10728 44.84 | 12850 53.71 | 14960 62.53 | 17080 71.39 |
| Wobbe index W (MJ/m 3) combustion potential CP | 43.29 89.88 | 46.92 85.48 | 52.26 79.05 | 57.85 72.54 | 62.94 67.31 | 67.73 63.00 |
| Lighter hydrocarbons (volume %) water-gas (volume %) | 5 95 | 10 90 | 15 85 | 20 80 | 25 75 | 30 70 |
| Air mixture (kcal/m 3) calorific value (MJ/m 3) | 4938 20.64 | 7136 29.83 | 9330 39.00 | 11530 48.20 | 13730 57.39 | 15928 66.58 |
| Wobbe index W (MJ/m 3) combustion potential CP | 25.48 89.34 | 33.90 81.49 | 41.49 75.58 | 48.20 70.40 | 54.14 65.80 | 59.98 62.25 |
| Lighter hydrocarbons (volume %) producer gases (volume %) | 10 90 | 15 85 | 20 80 | 25 75 | 30 70 | 35 65 |
| Air mixture (kcal/m 3) calorific value (MJ/m 3) | 5966 24.94 | 8230 34.40 | 10500 43.89 | 12760 53.34 | 15018 62.78 | 17280 72.23 |
| Wobbe index W (MJ/m 3) combustion potential CP | 23.75 29.01 | 31.56 29.45 | 38.5 29.6 | 45.20 29.99 | 51.46 30.35 | 57.33 30.69 |
| Lighter hydrocarbons (volume %) blast furnace gases (volume %) | 10 90 | 15 85 | 20 80 | 25 75 | 30 70 | 35 65 |
| Air mixture (kcal/m 3) calorific value (MJ/m 3) | 5530 23.12 | 7820 32.69 | 10100 42.22 | 12390 51.79 | 14680 61.36 | 16970 70.93 |
| Wobbe index W (MJ/m 3) combustion potential CP | 21.19 20.26 | 28.85 22.64 | 35.99 23.59 | 42.73 24.50 | 49.09 25.37 | 55.16 26.23 |
Wobbe index W and combustion potential in the table 1 are to be got by the calorific value calculation of air mixture, and calculation formula is consulted document (Jiang Zhenghou chief editor, gas technical manual, P.24, P.54, press of Tongji University, 1993 years).Can find out from table 1: gas of light hydrocarbon of the present invention can be mixed with the air mixture of different calorific values with gas maked coal, and also has Wobbe index and the combustion potential CP that conforms to Chinese classifying gas standard, to satisfy the needs of different occasions and operating mode.
Except adopting gas maked coal and gas of light hydrocarbon to be mixed the system gas, also can adopt nitrogen (being the discharging gas of oxyen manutactory) and the gas of light hydrocarbon system gas that is mixed.Light-hydrocarbon gas volume content per-cent set-point must not considered limits of explosion in the combustion gas that is mixed of making, can from 1% to 35%, or surpass 35%, air mixture does not all have explosion hazard, is very safe.Volume content set-point 5-30% commonly used, special occasions use the set-point of content to reach or surpass 35%.
The pipe-line transportation that the present invention fully takes into account winter and cold district not dewfall, be mixed to such an extent that calorific value is 11500kcal/m at coke-oven gas and light-hydrocarbon gas
3Air mixture, transmission ﹠ distribution pressure is 0.3kg/cm
2The time ,-15 ℃ can not revealing, be mixed to such an extent that calorific value is 6000kcal/m at blast furnace gas and light-hydrocarbon gas
3Air mixture, transmission ﹠ distribution pressure is 0.1kg/cm
2The time ,-20 ℃ can not revealing, guarantee the normal gas supply conduit of winter and cold district.
The producing gas method that is mixed of gas of light hydrocarbon of the present invention and gas maked coal can be controlled the consistence and the stability of the continuous air feed calorific value of air mixture effectively, and the calorific value index of air mixture can be guaranteed reliably.The calorific value of the air mixture that the inventive method is made can reach 4000-16000kcal/m
3
Advantage of the present invention is: the raw material lighter hydrocarbons of gas of light hydrocarbon and gas maked coal raw material, both sources are all very wide, especially the calorific value of blast furnace gas and fertilizer plant's producer tail gas is all very low, can not make piped gas and use, and general the employing directly of factory discharged, both wasted energy, again contaminate environment.Can be made into the gas of the various calorific values that meet Chinese classifying gas standard after the present invention is mixed the light-hydrocarbon gas of this low heat value gas maked coal and high heating value, resident's combustion gas cause also satisfies industrial needs near the development system gas factory.And the combustion gas that is mixed reaches in the pipe-line transportation of cold district not dewfall in the winter time, guaranteed the normal air feed of winter and cold district.
Be further elaborated below in conjunction with drawings and Examples, but not and place restrictions on scope of the present invention.
Description of drawings
Fig. 1 is the present invention's first process flow sheet, and wherein light-hydrocarbon gas and gas maked coal are mixed after measuring by under meter.
Fig. 2 is the present invention's second process flow sheet, and wherein light-hydrocarbon gas and gas maked coal are to be mixed by certain content ratio in the mixed air cavity of Venturi.
Embodiment 1
The boiling point that to obtain from petroleum chemical plant is that the mixing light petroleum naphtha below 80 ℃ is emitted from container for storing liquid, filters through 120 order strainers, is pressurized to 5kg/cm
2And with the nozzle spray atomizing, the lighter hydrocarbons that will atomize are again sent into board-like spacer well heater internal heating, make it to be gasificated into rapidly band compression ignite gas, by under meter metering 10% (volume %), the input mixing chamber by exporting blast furnace gas in the gas-holder, is adjusted to identical 5kg/cm with light-hydrocarbon gas pressure with its pressure in addition
2, also by behind under meter metering 90% (the volume %), the input mixing chamber is mixed, combustion heat value be 5530kcal/m
3Air mixture, be 21.19MJ/m by the Wobbe index W of calorific value calculation
3, combustion potential is 20.26.Low pressure 300mmH is adopted in air mixture
2The O one-level is transported to the user.
Embodiment 2
The boiling point that to obtain from petroleum chemical plant is that the mixing light petroleum naphtha below 30 ℃ is emitted from container for storing liquid, filters through 120 order strainers, is pressurized to 3kg/cm
2And atomize through nozzle spray, the lighter hydrocarbons that will atomize are again sent into shell and tube spacer well heater internal heating, make it to be gasificated into rapidly band compression ignite gas, sending into the Venturi central nozzle sprays, the selection nozzle diameter is 6mm, also can finely tune spraying pressure by valve, enter the Venturi ejection cavity by output coke-oven gas in the gas-holder in addition, produce injection power by the coke-oven gas in the light-hydrocarbon gas drive ejection cavity of Venturi central-injection, the ejection cavity caliber is 62mm, and making coke-oven gas and light-hydrocarbon gas be mixed into calorific value by 5.7: 1 volume ratio in mixing air cavity is 10728kcal/m
3Air mixture, getting Wobbe index W by calorific value calculation is 52.26MJ/m
3, combustion potential is 79.05, pressurization 0.2kg/cm is adopted in air mixture
2Long distance is transported to transmission and distribution network, arrives 200mm H by the sub-district pressure regulation
2O enters the user.
Embodiment 3
The boiling point that to obtain from petroleum chemical plant is that the mixing light petroleum naphtha below 50 ℃ is emitted from container for storing liquid, filters through 120 order strainers, is pressurized to 4kg/cm
2And atomize through nozzle spray, the lighter hydrocarbons that will atomize are again sent into spiral spacer well heater internal heating, make it to be gasificated into rapidly band compression ignite gas, sending into the Venturi central nozzle sprays, the selection nozzle diameter is 30mm, also can finely tune spraying pressure by valve, enter the Venturi ejection cavity by output coke-oven gas in the gas-holder in addition, produce injection power by the coke-oven gas in the light-hydrocarbon gas drive ejection cavity of Venturi central-injection, the ejection cavity caliber is 306mm, and making producer gas and light-hydrocarbon gas be mixed into calorific value by 9: 1 volume ratio in mixing air cavity is 6000kcal/m
3Air mixture, getting Wobbe index W by calorific value calculation is 23.75MJ/m
3, combustion potential is 29.01, pressurization 0.2kg/cm is adopted in air mixture
2Long distance is transported to transmission and distribution network, arrives 200mm H by the sub-district pressure regulation
2O enters the user.
Claims (2)
1, the producing gas method that is mixed of a kind of gas of light hydrocarbon and gas maked coal is characterized in that the key step of this method is followed successively by:
(1) mixed light-hydrocarbon that filters boiling point 26-82 ℃ filters stand-by through 120 order strainers;
(2) gasification is pressurized to 3-5kg/cm with mixed light-hydrocarbon
2, and through the nozzle spray atomizing, the lighter hydrocarbons that will atomize again are at spacer well heater internal heating, its Heating temperature is 95-120 ℃, makes it to be gasificated into rapidly band compression ignite gas;
(3) be mixed two kinds of modes that are mixed can be arranged:
(a) with light-hydrocarbon gas and gas maked coal respectively by the under meter metering, be that the ratio of 5-30% enters in the mixing chamber and is mixed in the volume content of light-hydrocarbon gas in air mixture;
(b) will be with the pressure light-hydrocarbon gas through the Venturi central-injection, by nozzle diameter size control emitted dose, the gas maked coal that drives in the ejection cavity around produces injection power, the caliber size of control ejection cavity make light-hydrocarbon gas by volume content 5-30% ratio and gas maked coal by volume the ratio of content 95-70% in mixed air cavity, be mixed;
(4) transmission ﹠ distribution adopt low pressure one-level transmission ﹠ distribution by pipeline, or adopt the long distance of pressurization to carry.
2, the producing gas method that is mixed as claimed in claim 1, in the step that it is characterized in that being mixed, light-hydrocarbon gas is through the Venturi central-injection, and its nozzle diameter is 3.4-36.9mm, and the ejection cavity caliber is 30-350mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97125215A CN1051797C (en) | 1997-12-30 | 1997-12-30 | Method for preparation of mixed gas of light hydrocarbon gas and coal gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97125215A CN1051797C (en) | 1997-12-30 | 1997-12-30 | Method for preparation of mixed gas of light hydrocarbon gas and coal gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1188139A CN1188139A (en) | 1998-07-22 |
| CN1051797C true CN1051797C (en) | 2000-04-26 |
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| CN97125215A Expired - Fee Related CN1051797C (en) | 1997-12-30 | 1997-12-30 | Method for preparation of mixed gas of light hydrocarbon gas and coal gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007006236A1 (en) * | 2005-07-14 | 2007-01-18 | Shanghai Lianxiang Real Estate Co., Ltd. | A production method for civil mixed fuel gas consisting of light hydrocarbons mixed with air and coal gas |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210207B (en) * | 2006-12-31 | 2011-04-06 | 上海联翔置业有限公司 | Mixed flue gas blended with air and dimethyl ether and preparation method thereof |
| CN101037627B (en) * | 2007-04-19 | 2012-05-09 | 罗东晓 | Method and device for producing town gas by using refinery exhaust |
| CN105650666A (en) * | 2014-08-13 | 2016-06-08 | 宋贵中 | Gas distribution and combustion technology of gas-fired equipment |
| CN104949123B (en) * | 2015-06-19 | 2017-07-04 | 国电科学技术研究院 | It is a kind of to mix the apparatus and method for burning alcohol-based fuel for natural gas |
| US20170115246A1 (en) * | 2015-10-23 | 2017-04-27 | Air Products And Chemicals, Inc. | Method and Apparatus for Determining Heating Value |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067447A (en) * | 1992-05-05 | 1992-12-30 | 顾建平 | A kind of method and equipment thereof that pentane is converted into universal gas |
| CN1104746A (en) * | 1994-10-20 | 1995-07-05 | 陈兴曾 | Gasification and application of low-grade cracking light hydrocarbon fuel |
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1997
- 1997-12-30 CN CN97125215A patent/CN1051797C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067447A (en) * | 1992-05-05 | 1992-12-30 | 顾建平 | A kind of method and equipment thereof that pentane is converted into universal gas |
| CN1104746A (en) * | 1994-10-20 | 1995-07-05 | 陈兴曾 | Gasification and application of low-grade cracking light hydrocarbon fuel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007006236A1 (en) * | 2005-07-14 | 2007-01-18 | Shanghai Lianxiang Real Estate Co., Ltd. | A production method for civil mixed fuel gas consisting of light hydrocarbons mixed with air and coal gas |
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| CN1188139A (en) | 1998-07-22 |
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