CN1221781A - Tech. for prepn. of mixed gas - Google Patents
Tech. for prepn. of mixed gas Download PDFInfo
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- CN1221781A CN1221781A CN 97125219 CN97125219A CN1221781A CN 1221781 A CN1221781 A CN 1221781A CN 97125219 CN97125219 CN 97125219 CN 97125219 A CN97125219 A CN 97125219A CN 1221781 A CN1221781 A CN 1221781A
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Abstract
A process for preparing the mixed gas having high heat value of 3500-14000 Kc/cu.m includes filtering the cracked light hydrocarbon, hydrogenated light hydrocarbon or mixed liquefied gas, whose boiling point is lower than 40 deg.C, and removing impurities, gasifying the filtered liquefied fuel while heating to 35-80 deg.C to obtain pressurized gas fuel with high heat value, mixing the pressured high-heat-value gas fuel (5-35 vol.%) with the low-heat-value gas (65-95 vol.%), and delivering the mixed gas. Its advantages are high heat value and safety.
Description
The present invention relates to a kind of technology that cracking light hydrocarbon in the byproduct of low heat value gas and petrochemical industry, hydrogenation lighter hydrocarbons are prepared.
Continuous expansion along with China's urban construction, the emergence of boom town, the inhabitation of urban residents' market townization and the raising of quality of life, cry to the use pipe gas is also more and more higher, but existing producer gas plant system tolerance is limited, can only keep, unablely go dilatation, therefore on the one hand being that the gas supply anxiety is made troubles to people's life, is some fertilizer planies on the other hand, is lower than 2000 kilocalories/m in the little steel mill
3Combustible gas and the high heating value combustion gas emptying in the petroleum chemical enterprise, not only wasted the energy and also caused certain environmental pollution.
The objective of the invention is to: provide a kind of and gasify with the cracking light hydrocarbon in the petrochemical industry byproduct, hydrogenation lighter hydrocarbons etc., be mixed with the novel process of air mixture again with low-calorie gas, it can alleviate the insufficient energy problem of present liquefied gas, for the cities and towns people provide a kind of inexpensive, the fuel of calorific value height, safety, health.
Technical solution of the present invention is achieved in that the blending process of air mixture, it is characterized by: described air mixture is undertaken by following key step:
(1) gets the raw materials ready: cracking light hydrocarbon, hydrogenation lighter hydrocarbons or the blended liquefied gas of boiling point≤40 ℃ is stand-by after the removal of impurities after filtration;
(2) gasification: combustion hydraulic pressure is after filtering delivered to gasifier, be heated to 35-80 ℃, generate high heating value combustion gas with pressure;
(3) mix gas: high heating value combustion gas with pressure and low heat value gas pass through under meter separately after the equipressure adjustment, press high heating value combustion gas 5-35%, and the volume percent of low heat value gas 65-95% enters and is mixed into calorific value in the mixing chamber is 3500-14000 kilocalorie/m
3Air mixture; Or high heating value combustion gas with pressure sprayed in the mixed air cavity of Venturi core jet pipe through being transported to low heat value gas, low heat value gas around driving produces injection power, makes low heat value gas be mixed into 3500-14000 kilocalorie/m with the volume percent of high heating value combustion gas 5-35% by 65-95% in mixing air cavity
3Air mixture;
(4) transmission ﹠ distribution: directly air mixture is adopted the long distance of low pressure one-level transmission ﹠ distribution or pressurization to carry, also air mixture can be imported the air storage peak regulation and store, adopt low pressure one-level transmission ﹠ distribution or the long distance of pressurization midway to carry again as required.
The present invention has following characteristics:
1, the lighter hydrocarbons of high heating value source is wide, can obtain from petrochemical plant, refinery or natural gas condensate, and the kilogram calorific value is greater than liquefied petroleum gas (LPG), but price is lower than liquefied petroleum gas (LPG);
2, cracking light hydrocarbon, the hydrogenation lighter hydrocarbons of boiling point≤40 ℃ are liquid at normal temperatures and pressures, so store with transportation all more convenient;
3, solved the tail gas of national thousands of families small fertilizer plant, the blast furnace gas of minimill, can not do because of calorific value is low piped gas use can only emptying problem;
4, save the energy, alleviated the problem of gas supply anxiety, reduced environmental pollution;
5, can divide section gasification mixed, and use pipe-line transportation, remove the trouble that existing liquefied gas changes the bottle ventilation, and be convenient to the widely-used of utensil such as gas heater;
6, Pei Zhi air mixture calorific value can be higher than coke-oven gas, but cost is lower than the coal gas that the coke-oven plant produces, and reaches 1.2 yuan/m according to measuring and calculating coke-oven gas cost
3, and gas mixture only is 0.8/m
3
7, construction investment is significantly less than the investment of coke oven or water-gas engineering, especially is fit to build the little chemical fertilizer of development, near the resident's of minimill combustion gas cause;
8, air mixture is carried out under the situation of sealing, do not contact with air, so oxygen level is seldom very safe, and no explosion hazard, and CO is extremely low, uses very safe.
Fig. 1 is for mixing Venturi tube in the gas synoptic diagram that is mixed
Below the invention will be further described and provide embodiment
The preparing process of this air mixture mainly by get the raw materials ready, gasify, mixed gas, transmission ﹠ distribution four big steps carries out:
Get the raw materials ready: will from the enterprises such as petrochemical industry obtain≤40 ℃ cracking light hydrocarbon, hydrogenation lighter hydrocarbons or mixed The liquefied gas that closes after filtration, stand-by after the removal of impurities, the liquefied gas that wherein mixes is, with splitting of boiling point≤40 ℃ Solution lighter hydrocarbons or hydrogenation lighter hydrocarbons are undertaken by the 20-80% (being percent by volume) of 20-80 and liquefied petroleum gas Mix; Be filtered into and adopt the above wire netting of 100 orders to carry out filtering and impurity removing;
Gasification: combustion hydraulic pressure is after filtering delivered to gasifier, be heated to 35-80 ℃, generate high heating value combustion gas with pressure, wherein when gasification can be at gasifier, in the low pressure seal container, be warmed to 45-65 ℃ with the concurrent heating outside container body of explosion-proof accompanying-heat cable band, also can adopt hot water or steam to carry out coiled or the shell and tube gasifier is warmed to 50-80 ℃, the pressure of the high heating value combustion gas with pressure of generation is 0.5-2.5kg/ cm3(gauge pressure), calorific value are 20000-40000 kilocalorie/m3；
Mixed gas: mainly contain at present two kinds of methods, all carry out under the state of sealing by pipeline, the one, with the high heating value combustion gas with pressure that generates and low-calorie blast furnace gas, chemical fertilizer factory's tail gas, water-gas or other the low heat value gas sent here through the pipeline flowmeter by separately after the equipressure adjustment, press high heating value combustion gas 5-35%, the percent by volume of low heat value gas 65-95% enters and is mixed into calorific value in the mixing chamber is 3500-14000 kilocalorie/m3Air mixture; The 2nd, high heating value combustion gas with pressure is sprayed through the venturi center Guan Jing is delivered to interior injection of mixed air cavity of low heat value gas, and the low heat value gas around driving produces injection and moves Power makes low heat value gas enter to mix in the air cavity by the percent by volume of 65-95% and high heating value combustion gas 5-35% Be mixed into 3500-14000 kilocalorie/m3Air mixture; Wherein the nozzle 1 of Venturi tube is positioned at mixed air cavity 2 The collapsible tube 3 of porch and the intersection of trunnion 4, nozzle exit pressure is 1.5-4kg/cm2；
Transmission ﹠ distribution: directly air mixture is adopted the long distance of low pressure one-level transmission ﹠ distribution or pressurization to carry, carried with pipeline after also can storing with the gas holder peak regulation again, wherein the pressure of one-level transmission ﹠ distribution is 0.3-0.5kg/cm2。
The proportioning of high heating value combustion gas and different low heat value gas, reference calorific value and the combustion potential of air mixture, shown in following table 1-4, the calorific value of the high heating value combustion gas lighter hydrocarbons in the table is 39600 kilocalories/m3, the calorific value of coke-stove gas is 4600 kilocalories/m3, water-gas calorific value be 2800 kilocalories/m3, blast furnace gas calorific value be 950 kilocalories/m3。
Table 1
| Light-hydrocarbon gas content % coke-stove gas content % | 8 92 | 10 90 | 13 87 | 15 85 | 20 80 | 25 75 |
| The hot kcal/m MJ/m of air mixture | 7461 31.19 | 8141 34.03 | 9162 38.30 | 9842 41.14 | 11542 48.25 | 13243 55.36 |
| Wobbe index W (MJ/ m) CP combustion potential | 40.91 89.85 | 42.64 85.64 | 45.22 80.36 | 46.80 77.23 | 50.58 70.66 | 54.12 65.45 |
Table 2
| Light-hydrocarbon gas content % water-gas content % | 5 95 | 10 90 | 15 85 | 20 80 | 25 75 | 30 70 |
| The hot kcal/m MJ/m of air mixture | 4540 18.98 | 6341 26.51 | 8142 34.03 | 9942 41.56 | 11743 49.09 | 13543 56.61 |
| Wobbe index W (MJ/m) CP combustion potential | 23.20 88.45 | 29.69 80.29 | 35.37 73.86 | 40.51 68.62 | 45.16 64.17 | 49.48 60.40 |
Table 3
| Light-hydrocarbon gas content % producer gas content % | 10 90 | 15 85 | 20 80 | 25 75 | 30 70 | 25 75 |
| The hot kcal/m MJ/m of air mixture | 5171 21.61 | 70037 29.41 | 8902 37.21 | 10768 45.01 | 12633 52.81 | 14499 60.61 |
| Wobbe index W (MJ/m) CP combustion potential | 20.43 28.79 | 26.62 29.05 | 32.16 29.17 | 37.38 29.39 | 42.28 29.64 | 46.91 29.93 |
Table 4
| Light-hydrocarbon gas content % blast furnace gas content % | 10 90 | 15 85 | 20 80 | 25 75 | 30 70 | 25 75 |
| The hot kcal/m MJ/m of air mixture | 4715 19.71 | 6606 27.61 | 8496 35.51 | 10387 43.42 | 12278 51.32 | 14169 59.23 |
| Wobbe index W (MJ/m) CP combustion potential | 17.89 21.44 | 24.03 22.33 | 29.77 23.20 | 35.13 24.02 | 40.16 24.81 | 44.94 25.59 |
Embodiment 1
Lighter hydrocarbons that will be from boiling point≤40 that petroleum chemical plant is obtained ℃ are forced into 2kg/cm
2After 120 order aluminium net filtrations are removed mechanical impurity, enter the gasifier heating and gasifying, generate 65 ℃ high heating value band compression ignite gas, 0.2kg/cm again reduces pressure the high heating value combustion gas to
2, send into mixed air cavity by under meter by 10% volume percent, fertilizer plant's tail gas of sending here with pipeline is pressurized to 0.2kg/cm by the force feed machine simultaneously
2, also send into mixed air cavity by 90% volume percent by under meter, be mixed into air mixture, send into gas-holder.
The thick carbon of obtaining from ethylene project five divides through temperature and to slip tower and obtain smart carbon five below 40 ℃, is mixed into 10500Kcal/m with coke-oven gas
3The pipe gas of calorific value, according to the calorific value requirement, be mixed than being lighter hydrocarbons 16: coke-oven gas 84, volume are mixed than getting 1: 5.1.
Adopt the Venturi technology that is mixed, the lighter hydrocarbons Heating temperature is 60 ℃, and nozzle pressure is 2kg/cm
2Gas deliverability and nozzle diameter d1 and injecting tube diameter d 2 are as follows:
| Gas deliverability m 3/ H lighter hydrocarbons nozzle diameter d 1 mmCoke-oven gas injecting tube diameter d 2 mm | 50 4.3 44 | 100 6.0 62 | 200 8.5 86 | ?300 ?10.4 ?106 | ?500 ?13.5 ?138 | 800 17 174 | ?1000 ?19 ?194 | ?2500 ?30 ?306 |
Embodiment 3
From slide part lighter hydrocarbons that refinery is obtained, pentane is mixed with blast furnace gas, and the calorific value after being mixed requires to reach 8500kcal/m
3The pipe-line transportation combustion gas is mixed than for pentane 20%, and blast furnace gas 80%, volume are mixed than being 1: 4.Adopt the Venturi technology that is mixed, the pentane Heating temperature is 80 ℃, and nozzle pressure is 3.5kg/cm
2Gas deliverability and nozzle diameter d1 and injecting tube diameter d 2 are as follows:
| Gas deliverability m 3/ H lighter hydrocarbons nozzle diameter d 1 mmBlast furnace gas injecting tube diameter d 2 mm | 50 4.4 38 | ?100 ?6.24 ?54 | 200 8.8 78 | ?300 ?10.8 ?94 | ?500 ?14 ?122 | ?800 ?17.6 ?154 | ?1000 ?19.7 ?172 | ?2500 ?31.2 ?274 |
Claims (5)
1. the blending process of air mixture, it is characterized by: described air mixture is undertaken by following key step:
(1) get the raw materials ready: with cracking light hydrocarbon, hydrogenation lighter hydrocarbons or the blended liquefied gas of boiling point≤40 ℃ after filtration, stand-by after the removal of impurities;
(2) gasification: combustion hydraulic pressure is after filtering delivered to gasifier, be heated to 35-80 ℃, generate high heating value combustion gas with pressure;
(3) mix gas: high heating value combustion gas with pressure and low heat value gas pass through under meter separately after the equipressure adjustment, press high heating value combustion gas 5-35%, and the volume percent of low heat value gas 65-95% enters and is mixed into calorific value in the mixing chamber is 3500-14000 kilocalorie/m
3Air mixture; Or high heating value combustion gas with pressure sprayed in the mixed air cavity of Venturi core jet pipe through being transported to low heat value gas, low heat value gas around driving produces injection power, makes low heat value gas be mixed into 3500-14000 kilocalorie/m with the volume percent of high heating value combustion gas 5-35% by 65-95% in mixing air cavity
3Air mixture;
(4) transmission ﹠ distribution: directly air mixture is adopted the long distance of low pressure one-level transmission ﹠ distribution or pressurization to carry, also air mixture can be imported the air storage peak regulation and store, adopt low pressure one-level transmission ﹠ distribution or the long distance of pressurization midway to carry again as required.
2. by the blending process of the described air mixture of claim 1, it is characterized in that: the blended liquefied gas mixes with the 20-80% (being volume percent) of liquefied petroleum gas (LPG) by 20-80% for cracking light hydrocarbon or the hydrogenation lighter hydrocarbons with boiling point≤40 ℃.
3. by the blending process of the described air mixture of claim 1, it is characterized in that: adopt the above wire netting of 100 orders to carry out filtering and impurity removing.
4, the blending process by the described air mixture of claim 1 is characterized in that: it is 0.5-2.5kg/cm that band is pressed the pressure of high heating value combustion gas
3, calorific value is 20000-40000 kilocalorie/m
3
5. by the blending process of the described air mixture of claim 1, it is characterized in that: the nozzle of Venturi tube is positioned at the collapsible tube of mixed air cavity ingress and the intersection of trunnion, and nozzle pressure is 1.5-4kg/cm
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97125219 CN1221781A (en) | 1997-12-30 | 1997-12-30 | Tech. for prepn. of mixed gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97125219 CN1221781A (en) | 1997-12-30 | 1997-12-30 | Tech. for prepn. of mixed gas |
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| Publication Number | Publication Date |
|---|---|
| CN1221781A true CN1221781A (en) | 1999-07-07 |
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|---|---|---|---|
| CN 97125219 Pending CN1221781A (en) | 1997-12-30 | 1997-12-30 | Tech. for prepn. of mixed gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037627B (en) * | 2007-04-19 | 2012-05-09 | 罗东晓 | Method and device for producing town gas by using refinery exhaust |
| CN105257989A (en) * | 2015-10-13 | 2016-01-20 | 中油海科燃气有限公司 | Concentration measuring and controlling and pipeline conveying method for air-light hydrocarbon mixing gas |
-
1997
- 1997-12-30 CN CN 97125219 patent/CN1221781A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037627B (en) * | 2007-04-19 | 2012-05-09 | 罗东晓 | Method and device for producing town gas by using refinery exhaust |
| CN105257989A (en) * | 2015-10-13 | 2016-01-20 | 中油海科燃气有限公司 | Concentration measuring and controlling and pipeline conveying method for air-light hydrocarbon mixing gas |
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