CN104154557A - Energy-saving combustion device for physical activation of dimethyl ether and combustion method for physical activation of dimethyl ether - Google Patents
Energy-saving combustion device for physical activation of dimethyl ether and combustion method for physical activation of dimethyl ether Download PDFInfo
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- CN104154557A CN104154557A CN201310179749.2A CN201310179749A CN104154557A CN 104154557 A CN104154557 A CN 104154557A CN 201310179749 A CN201310179749 A CN 201310179749A CN 104154557 A CN104154557 A CN 104154557A
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Abstract
The invention discloses an energy-saving combustion device for physical activation of dimethyl ether and a combustion method for physical activation of the dimethyl ether, and relates to the technical field of application of dimethyl ether alternative fuel. The energy-saving combustion device comprises a dimethyl ether liquefied gas tank body, a liquefied gas vaporizer, a gas-liquid separator and a fuel gas reducing valve, wherein the dimethyl ether liquefied gas tank body, the liquefied gas vaporizer, the gas-liquid separator and the fuel gas reducing valve are sequentially connected through pipelines. An outlet of the fuel gas reducing valve is connected with an energy-saving device for physical activation of the dimethyl ether, the energy-saving device for physical activation of the dimethyl ether is composed of a gas superheater and a dimethyl ether converter, an outlet of the dimethyl ether converter is connected with a combustor through a pipeline, and a dimethyl ether low-temperature conversion catalyst is contained in the dimethyl ether converter. The energy-saving combustion device has the advantages of having the capacity for generating more heat energy from physical activation of the dimethyl ether and improving the energy-saving effect. In addition, the combustion method for physical activation of the dimethyl ether increases the heat of combustion of the dimethyl ether and reduces combustion cost.
Description
[technical field]
The present invention relates to the applied technical field of dimethyl ether alternative fuel, energy-saving combustion apparatus and combustion method thereof that especially a kind of dimethyl ether is physically activated.
[background technology]
The application technology of domestic dimethyl ether alternative fuel is also a lot, but great majority are all to take on burner, transform or transform on combustion apparatus, have increased like this quantities, also need to increase professional and technical personnel.The transformation of large-scale combustion apparatus not only exists original equipment parameter is existed to risk, still cannot reach energy-conservation ideal effect.
[summary of the invention]
The object of the invention is to effectively overcome the deficiency of above-mentioned technology, provide a kind of dimethyl ether physically activated energy-saving combustion apparatus, the present invention utilizes the device of original LPG liquid gas vaporization device, the gas heater newly increasing and dimethyl ether conversion device are effectively fused, thereby reach and both can use former LPG liquefied gas, the object that also can use dimethyl ether liquefied gas has reduced fuel cost simultaneously, improves combustion heat value.
Technical scheme of the present invention is achieved in that it includes dimethyl ether liquefied gas tank body, liquid gas vaporization device, gas-liquid separator and the gas pressure-reducing valve connecting successively by pipeline, its improvements are: the exit of described gas pressure-reducing valve is connecting the physically activated energy saver of dimethyl ether, the physically activated energy saver of this dimethyl ether is connected to form by gas superheat device and dimethyl ether conversion device, and the outlet of described dimethyl ether conversion device is connected with burner by pipeline; Dimethyl ether conversion device inside is provided with dimethyl ether low temperature conversion catalyst;
Preferably, the main component of described dimethyl ether low temperature conversion catalyst is modification AL
2o
3;
Preferably, the heating-up temperature in described liquid gas vaporization device is 60-70 DEG C;
Preferably, the heating-up temperature in described liquid gas vaporization device is 65 DEG C;
Preferably, the exit temperature of described gas pressure-reducing valve is 20-40 DEG C;
Preferably, the exit temperature of described gas superheat device and dimethyl ether conversion device is 80-130 DEG C.
Another object of the present invention is to provide a kind of combustion method that is applicable to the physically activated energy-saving combustion apparatus of above-mentioned dimethyl ether, and firing method comprises the following steps:
A, dimethyl ether liquefied gas tank body are connected with liquid gas vaporization device by pipeline, by the dimethyl ether vaporization of liquid phase, obtain the dimethyl ether of gaseous state, and the temperature of described liquid gas vaporization device inside is 60-70 DEG C;
B, gas-liquid separator are connected to liquid gas vaporization device exit, and liquefied gas is realized to gas-liquid separation;
The dimethyl ether of C, gaseous state is realized decompression by gas pressure-reducing valve, makes dimethyl ether be depressurized to the working pressure before burner, and the dimethyl ether temperature in gas pressure-reducing valve exit is 20-40 DEG C;
D, gas superheat device are connected to the exit of gas pressure-reducing valve, and making gas of dimethyl ether temperature rise by the heating of dimethyl ether superheater is the critical-temperature of relevant pressure, and described critical-temperature is 80-130 DEG C;
E, gas of dimethyl ether after heating are sent in dimethyl ether conversion device, heat-activated under the catalytic action of the dimethyl ether low temperature conversion catalyst of gas of dimethyl ether in dimethyl ether conversion device, its heating-up temperature is 80-130 DEG C, the dimethyl ether supplied burner burning after activation.
Beneficial effect of the present invention is: one, the present invention utilize the device of original LPG liquid gas vaporization device, the gas heater newly increasing and dimethyl ether conversion device are effectively fused, thereby reach and both can use former LPG liquefied gas, also can use the object of dimethyl ether liquefied gas, reduce fuel cost simultaneously, improved combustion heat value; Two, the physically activated energy-saving combustion apparatus of dimethyl ether disclosed by the invention has possessed the larger heat energy of the physically activated generation of dimethyl ether, improves the ability of energy-saving effect, and can be easily to oil gas conversion, and the user of factory more can be according to Market Selection combustion gas; Three, the physically activated energy-saving combustion apparatus of dimethyl ether of the present invention substitutes the power-economizing method of burning with respect to other dimethyl ether, and process equipment obviously reduces, and plant investment reduces, and occupation of land reduces, device flow process is simple, stable operation.
[brief description of the drawings]
Fig. 1 is the physically activated energy-saving combustion apparatus schematic diagram of dimethyl ether of the present invention.
[detailed description of the invention]
Below in conjunction with drawings and Examples, the invention will be further described.
The present invention has disclosed the physically activated energy-saving combustion apparatus of a kind of dimethyl ether, shown in Fig. 1, for a specific embodiment of the physically activated energy-saving combustion apparatus of dimethyl ether of the present invention, in the present embodiment, this energy-saving combustion apparatus includes the dimethyl ether liquefied gas tank body 10 connecting successively by pipeline, liquid gas vaporization device 20, gas-liquid separator 30 and gas pressure-reducing valve 40, the exit of gas pressure-reducing valve 40 is connecting the physically activated energy saver of dimethyl ether, in the present embodiment, the physically activated energy saver of this dimethyl ether is connected to form by gas superheat device 50 and dimethyl ether conversion device 60, gas superheat device 50 is connected to the exit of gas pressure-reducing valve 40, the outlet of dimethyl ether conversion device 60 is connected with burner 70 by pipeline, and dimethyl ether conversion device 60 inside are provided with dimethyl ether low temperature conversion catalyst 601, the main component of dimethyl ether low temperature conversion catalyst 601 is modification AL
2o
3.
In conjunction with above-mentioned device, we are described the physically activated energy-saving combustion method of dimethyl ether being applied on this device: the dimethyl ether in dimethyl ether liquefied gas tank body becomes liquid, in the time turning on the valve of dimethyl ether liquefied gas tank body, dimethyl ether enters in liquid gas vaporization device 20 by pipeline 102, dimethyl ether at liquid gas vaporization device 20 interior liquid towardses is realized vaporescence, and the temperature of described liquid gas vaporization device inside is 60-70 DEG C; Liquid gas vaporization device 20 can make liquefied gas molecular link fully gasify after saturated to burn, reach the result of use that improves calorific value, increases intensity of fire, energy-conserving and environment-protective.Gas-liquid separator is connected to liquid gas vaporization device exit, gas-liquid separator 30 inside have precision Filter element 301, be used for liquefied gas is realized to gas-liquid separation, the sewage draining exit 302 of gas-liquid separator 30 bottoms is for discharging the impurity such as waste water, the dimethyl ether of gaseous state is disposed in gas pressure-reducing valve 40 by the gas outlet 303 at gas-liquid separator 30 tops, is also provided with a Pressure gauge 304 on gas-liquid separator 30.The dimethyl ether of gaseous state is realized decompression by gas pressure-reducing valve 40, make the dimethyl ether of gaseous state be depressurized to spendable pressure, the dimethyl ether in gas pressure-reducing valve 40 exits is low-pressure gas, the temperature of dimethyl ether is 20-40 DEG C, because the physical characteristic of dimethyl ether self is cold-producing medium, high pressure gas of dimethyl ether is in the time that gas pressure-reducing valve step-down is low-pressure gas, due to joule-Thomson refrigeration effect, the reducing pressure by regulating flow of pressure-reducing valve makes the temperature of gas of dimethyl ether be declined to become cold moist steam, now gas accompanies " solution-air " binary states, when making to burn, drop produces detonation if having during directly for burner, the cold of supercool gas has been offset a part of calory burning simultaneously, cause fuel value low, consumption is large, burning high cost.
As mentioned above, gas superheat device is connected to the exit of gas pressure-reducing valve, the gas of dimethyl ether of low pressure heats by gas heater, while making gas of dimethyl ether temperature rise be the critical-temperature (80-130 DEG C) of relevant pressure, the latent heat of liquefaction of gas is 0, cold is absorbed, and the Joule-Thomson effect of gas of dimethyl ether is eliminated; Gas of dimethyl ether after heating is sent in dimethyl ether conversion device, heat-activated under the catalytic action of the dimethyl ether low temperature conversion catalyst of gas of dimethyl ether in dimethyl ether conversion two devices, its heating-up temperature is 80-130 DEG C, dimethyl ether supplied burner burning after activation, the chemical equation of its burning is as follows:
CH
3OCH
3+O
2→CO
2+H
2O ①
CH
3OCH
3→CH
2O+CH
4 ②
CH
2O+O
2→CO
2+H
2O ③
Combustion process 1. in, dimethyl ether discharges self CH ability 34040KJ/kg, combustion process 2. in, chemical energy hidden dimethyl ether inside is converted into heat energy 5662KJ/kg to be discharged, these two heat energy are the combustion heat of dimethyl ether, the combustion heat of dimethyl ether is 39702KJ/kg, the relatively average combustion heat 45760KJ/kg of LPG oil gas, and the combustion heat of dimethyl ether has reached 86.76% of LPG.
Above-mentioned combustion process 1. in, the CH energy of dimethyl ether self comes from following result of calculation:
CH
3OCH
3
Molecular weight 46.07
C 52.04％×29.31KJ/g＝1528KJ
H 13.13％×142.85KJ/g＝1876KJ
O 34.73％×0.0＝0.0
Therefore dimethyl ether self CH energy is 34040KJ/kg.
Above-mentioned combustion process 2. in, dimethyl ether chemical energy comes from the heat energy that absorbs of initial product in chemical reaction process:
CO+2H
2→CH
3OH：△H＝-90.7KJ/mol
-1
2CH
3OH→CH
3OCH
3+H
2O
2×90.7KJ·mol
-1＝181.4KJ·mol
-1
181.4KJ·mol
-1÷32.04＝5662KJ/kg
According to this theorem of lid, no matter a chemical reaction, be that a step completes, or point several steps complete, and its total fuel factor is identical.According to law of conservation of energy, the energy that object absorbs, must discharge equal energy under certain condition, and therefore, the combustion heat of dimethyl ether is 39702KJ/kg.
Embodiment 1
We are in conjunction with concrete data below, and a kind of physically activated energy-saving combustion method of dimethyl ether that the present invention is disclosed is further detailed.
The dimethyl ether of liquid phase enters the heated vaporization of liquid gas vaporization device with flow 200Kg/n, vapourizing temperature is 40 DEG C, enter again gas-liquid separator, gaseous dimethyl is the pressure of burner defined through the outlet pressure of gas pressure-reducing valve decompression, low pressure dimethyl ether is heated and is made gas of dimethyl ether temperature rise by gas superheat device, when gas of dimethyl ether temperature is during higher than the critical-temperature of gas of dimethyl ether, now the latent heat of vaporization of gas of dimethyl ether is 0, the refrigerating capacity of gas of dimethyl ether is also eliminated, heated low-voltage high-temperature gas enters in dimethyl ether conversion device, by the catalyst heating of converter inside, activation, and export burner in the burning of combustion chamber generation chemical reaction, its reaction equation:
CH
3OCH
3+O2→CO
2+H
2O
CH
3OCH
3→CH
2O+CH
4
CH
2O+O
2→CO
2+H
2O
From whole flow process, the heated vaporization of dimethyl ether, decompression, low-pressure low-temperature gas burns as the burned device of fuel after activation by overheated intensification and on catalyst.Dimethyl ether as an alternative fuel must be at burning front activating before using, and this flow process and other combustion gas are distinguished to some extent.Be different from:
1) dimethyl ether is industrial chemicals, be the substitute of good cold-producing medium and fuel, the refrigerating capacity that fuel must produce dimethyl ether self before burning is as an alternative eliminated, and reduces ignition temperature and the combustion heat in order to avoid cold is brought combustion chamber into, cause combustion heat value low, consumption is large.
2) dimethyl ether is reactive industrial chemicals, and its chemical property has determined at high temperature can occur to decompose materials such as generating formaldehyde methane, and in combustion process, most of formaldehyde is by rapid oxidation consumption.The chemical property of dimethyl ether has also determined that its combustion process is chemical reaction burning, and in the time there is chemical change, the hidden chemical energy in dimethyl ether inside is released and is converted into heat energy.
3) dimethyl ether self oxygen content is up to 34.8%, and the oxygen content of LPG and natural gas is 0, and this is to distinguish to some extent.Dimethyl ether oxygen content is high, and burning required air quantity is less than LPG, and airborne amount of oxygen is also little, and heat loss when burning is also little, and therefore theoretical temperature combustion is higher than LPG, and efficiency of combustion is also high than LPG.
Following table is boiled 2.6L water institute's air consumption and time contrast experiment used:
| Content | DME kitchen range | LPG kitchen range |
| Test water weight | 2.6L | 2.6L |
| Test water temperature (DEG C) | 17 | 17 |
| Experiment start time room temperature (DEG C) | 20 | 20 |
| Room temperature when experimental result (DEG C) | 21 | 21 |
| Experiment start time gas cylinder gross weight (Kg) | 26.25 | 27.67 |
| Gas cylinder gross weight (Kg) when experiment finishes | 26.2 | 27.62 |
| Gas weight (Kg) that experiment consumes | 0.05 | 0.05 |
| Gas meter, flow meter reading (M when experiment starts 3) | 1.514 | 5.334 |
| Gas meter, flow meter reading (M when experiment finishes 3) | 1.546 | 5.369 |
| Gas volume (M that experiment consumes 3) | 0.032 | 0.035 |
| Test the time used | 7 points 23 seconds | 8 points 16 seconds |
Above table data declaration, the water of boiled same weight, temperature, DME result is that air consumption is the same with LPG kitchen range, the boiled time is faster than LPG kitchen range.Gas temperature and the density calculation of dimethyl ether during by air distribution disk heat-activated in stove:
Therefore, low pressure is crossed cold dimethyl ether at stone or metal plate for standing a stove on as a precaution against fire during by 81 DEG C of stove heating >, cold is eliminated, gas of dimethyl ether is activated, the CH of dimethyl ether can and be discharged and is converted into energy when the chemical change of chemical energy in the time burning, and dimethyl ether self oxygen content is high, and efficiency of combustion is higher than LPG, gross heat of combustion efficiency >=LPG oil gas, is proven burning contrast experiment.
Embodiment 2
The present embodiment dimethyl ether petroleum replacing gas is in the application of the molten aluminium stove of the Taizhou of Zhejiang leap 0.5t of group.
Burning comparing result under equal conditions:
Experimental result explanation, same weight, the aluminium of generation, the air consumption of dimethyl ether is fewer than LPG, and operating efficiency is higher than LPG.Therefore the physically activated energy-saving combustion method of dimethyl ether disclosed by the invention improves DME combustion calorific value, has reduced the cost of fuel.
Described above is only preferred embodiment of the present invention, and above-mentioned specific embodiment is not limitation of the present invention.In technological thought category of the present invention, can there is various distortion and amendment, retouching that all those of ordinary skill in the art make according to above description, revise or be equal to replacement, all belong to the scope that the present invention protects.
Claims (8)
1. the energy-saving combustion apparatus that dimethyl ether is physically activated, it includes the dimethyl ether liquefied gas tank body, liquid gas vaporization device, gas-liquid separator and the gas pressure-reducing valve that connect successively by pipeline, it is characterized in that: the exit of described gas pressure-reducing valve is connecting the physically activated energy saver of dimethyl ether, the physically activated energy saver of this dimethyl ether is connected to form by gas superheat device and dimethyl ether conversion device, and the outlet of described dimethyl ether conversion device is connected with burner by pipeline; Dimethyl ether conversion device inside is provided with dimethyl ether low temperature conversion catalyst.
2. the physically activated energy-saving combustion apparatus of a kind of dimethyl ether according to claim 1, is characterized in that: the main component of described dimethyl ether low temperature conversion catalyst is AL
2o
3.
3. the physically activated energy-saving combustion apparatus of a kind of dimethyl ether according to claim 1, is characterized in that: the heating-up temperature in described liquid gas vaporization device is 60-70 DEG C.
4. the physically activated energy-saving combustion apparatus of a kind of dimethyl ether according to claim 3, is characterized in that: the heating-up temperature in described liquid gas vaporization device is 65 DEG C.
5. the physically activated energy-saving combustion apparatus of a kind of dimethyl ether according to claim 1, is characterized in that: the exit temperature of described gas pressure-reducing valve is 20-40 DEG C.
6. the physically activated energy-saving combustion apparatus of a kind of dimethyl ether according to claim 1, is characterized in that: the exit temperature of described gas superheat device and dimethyl ether conversion device is 80-130 DEG C.
7. a combustion method that is applied to the physically activated energy-saving combustion apparatus of above-mentioned dimethyl ether, is characterized in that: this combustion method comprises the following steps:
A, dimethyl ether liquefied gas tank body are connected with liquid gas vaporization device by pipeline, by the dimethyl ether vaporization of liquid phase, obtain the dimethyl ether of gaseous state, and the temperature of described liquid gas vaporization device inside is 60-70 DEG C;
B, gas-liquid separator are connected to liquid gas vaporization device exit, and liquefied gas is realized to gas-liquid separation;
The dimethyl ether of C, gaseous state is realized decompression by gas pressure-reducing valve, makes dimethyl ether be depressurized to the working pressure before burner, and the dimethyl ether temperature in gas pressure-reducing valve exit is 20-40 DEG C;
D, gas superheat device are connected to the exit of gas pressure-reducing valve, and making gas of dimethyl ether temperature rise by the heating of dimethyl ether superheater is the critical-temperature of relevant pressure;
E, gas of dimethyl ether after heating are sent in dimethyl ether conversion device, heat-activated under the catalytic action of the dimethyl ether low temperature conversion catalyst of gas of dimethyl ether in dimethyl ether conversion device, its heating-up temperature is 80-130 DEG C, the dimethyl ether supplied burner burning after activation.
8. the physically activated energy-saving combustion method of a kind of dimethyl ether according to claim 7, is characterized in that: in described step D, described critical-temperature is 80-130 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552944A (en) * | 2020-03-23 | 2021-03-26 | 黄颖媛 | Waste gas treatment device for thermal cracking recovery of waste tires |
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2013
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552944A (en) * | 2020-03-23 | 2021-03-26 | 黄颖媛 | Waste gas treatment device for thermal cracking recovery of waste tires |
| CN112552944B (en) * | 2020-03-23 | 2022-07-22 | 苏州双福智能科技有限公司 | Waste gas treatment device for thermal cracking recovery of waste tires |
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Application publication date: 20141119 |