Synergist for increasing oxygen flame temperature of natural gas, preparation method as well as adding equipment and adding method of synergist

Abstract

The invention relates to the technical field of synergists for increasing the oxygen flame temperature of natural gas, in particular to a synergist for increasing the oxygen flame temperature of the natural gas, a preparation method of the synergist, adding equipment of the synergist and an adding method of the synergist. The oxygen flame temperature is increased to 3200 DEG C or above, the cutting and welding speed is higher, the oxygen flame can be injected into liquefied natural gas for liquid mixing in the environment of-160 DEG C, the mixed liquefied natural gas can directly enter the welding and cutting working condition after being gasified, and the low-temperature liquid mixing mode is smaller in liquid molecule distance, more sufficient and uniform in mixing and beneficial to long-distance transportation; and the gas-state molecules are mixed with natural gas in a pipeline in a gas-state manner, and the gas-state molecules are close in spacing and are fully and uniformly mixed, so that long-distance pipeline transportation is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of synergist for improving natural gas oxygen flame temperature, in particular to a synergist for improving natural gas oxygen flame temperature, a preparation method, and an adding device and method thereof. BACKGROUND

[0002] Due to the continuous deepening of environmental protection concepts and the continuous enhancement of safety awareness in recent years, the existing flame cutting gas in the field is gradually replaced by natural gas which is safer and more environmentally friendly, mainly propane and acetylene.

[0003] Due to the low temperature of natural gas oxygen flame, it is suitable for cutting small thickness metal materials, and propane and acetylene are still used for thicker metal materials, and cannot be replaced by acetylene for metal welding.

[0004] In order to solve the applicability of natural gas as a metal welding gas in various types of metal flame cutting and welding, and the safety and environmental protection in the production and use process, it is necessary to develop a natural gas environmentally friendly synergist.

[0005] At the same time, the common natural gas synergist adding mode at the present stage is to use gaseous natural gas at normal temperature to add liquid synergist in a gas-liquid mixing mode, the principle is to intermittently spray the additive in the form of fine droplets into the natural gas by the adding pump, and rely on the natural gas flow rate to drive the fine droplets to mix, the uniformity of this mixing method needs to be improved, the unit heat value and the combustion rate of the mixed natural gas cannot reach the best, it cannot replace propane for metal cutting above 400mm and replace acetylene for metal welding, and the liquid additive is easy to settle and hang on the wall in long distance pipeline transportation.

[0006] Therefore, in view of the deficiencies of the prior art, it is very necessary to provide a synergist for improving natural gas oxygen flame temperature, a preparation method, and an adding device and method thereof to solve the deficiencies of the prior art. SUMMARY

[0007] The present application aims to avoid the deficiencies of the prior art and provide a synergist for improving natural gas oxygen flame temperature, a preparation method, and an adding device and method thereof, which can realize stable mixing, improve unit combustion heat value and combustion rate, and increase oxygen flame temperature to above 3200 degrees Celsius by the components of the synergist, so as to cut and weld faster, and can be added to liquefied natural gas at-160℃ for liquid mixing, the liquefied natural gas after gasification can directly enter the welding and cutting working condition after mixing, this low temperature liquid mixing mode has smaller liquid molecular spacing, more uniform mixing, and is beneficial to long distance transportation, and can also be gasified into gaseous state, mixed with gaseous natural gas, and has similar gaseous molecular spacing, uniform mixing, and is beneficial to long distance pipeline transportation.

[0008] The above object of the present application is achieved by the following technical means.

[0009] The application provides a synergist for increasing the temperature of natural gas oxygen flame, and the synergist for increasing the temperature of natural gas oxygen flame comprises the following components in proportion by mass: 3% ferrocene, 1% tetrahydrofuran, 2% aluminum sec-butyl alcohol, 70% pentane and 24% propadiene.

[0010] Specifically, a preparation method of the synergist for increasing the temperature of natural gas oxygen flame comprises the following steps. S1: preparing a ferrocene solution, 3% ferrocene is injected into a mixed Dewar bottle, 1% tetrahydrofuran is injected into the mixed Dewar bottle, and the ferrocene is diluted and dissolved to obtain the ferrocene solution; S2: preparing a combustion rate synergistic solution, 2% aluminum sec-butyl alcohol is injected into the mixed Dewar bottle to obtain the combustion rate synergistic solution; S3: preparing a heat value rate synergistic solution, 70% pentane is injected into the mixed Dewar bottle to obtain the heat value rate synergistic solution; S4: preparing a non-low-temperature natural gas synergist, 24% propadiene is injected into the mixed Dewar bottle to obtain the non-low-temperature natural gas synergist; S5: preparing a finished natural gas synergist, the non-low-temperature natural gas synergist is injected into a liquid nitrogen heat exchange tank for low-temperature cooling, the cooling temperature is-160 DEG C, and the finished natural gas synergist is obtained.

[0011] Specifically, a preparation method of the synergist for increasing the temperature of natural gas oxygen flame comprises the following steps.

[0012] Specifically, the gasification conveying pipeline is provided with an additive flow valve and an additive flow meter, the natural gas welding conveying pipeline is provided with a natural gas flow valve and a natural gas flow meter, and the additive flow valve, the additive flow meter, the natural gas flow valve and the natural gas flow meter are electrically connected with the PLC controller.

[0013] Specifically, the ratio of the finished natural gas synergist to the natural gas is 5%:95%.

[0014] The application can realize stable mixing, improve unit combustion heat value and combustion rate, improve oxygen flame temperature to above 3200 degrees Celsius, cut and weld faster, and can be added into liquefied natural gas in a low-temperature liquid mixing mode at-160 degrees Celsius, and the liquefied natural gas after gasification can directly enter the welding and cutting working condition. The low-temperature liquid mixing mode has smaller liquid molecular spacing, more uniform mixing, and is beneficial to long-distance transportation. The liquefied natural gas can also be gasified into a gaseous state and mixed with pipeline natural gas in a gaseous state. The gaseous state has similar molecular spacing, and the mixture is fully and uniformly mixed and is beneficial to long-distance pipeline transportation. BRIEF DESCRIPTION OF DRAWINGS

[0015] The application will be further described with reference to the accompanying drawings, but the content of the drawings does not constitute any limitation on the application.

[0016] Figure 1 is a connection schematic diagram of an additive device of the synergist for improving the oxygen flame temperature of natural gas.

[0017] From Figure 1 , including: 1. Liquid nitrogen heat exchange tank; 2. Mixed Dewar flask; 3. Finished product Dewar flask; 4. Natural gas storage tank; 5. Natural gas welding and cutting pipeline; 6. Water bath gasifier; 7. PLC controller; 8. Total liquid outlet pipe; 9. First liquid outlet pipe; 10. Second liquid outlet pipe; 11. Gasification delivery pipeline; 12. Additive flow valve; 13. Additive flow meter; 14. Natural gas flow valve; 15. Natural gas flow meter. DETAILED DESCRIPTION

[0018] The application will be further described in conjunction with the following examples.

[0019] Example 1: As Figure 1 shown, a synergist for improving the oxygen flame temperature of natural gas, a preparation method, an additive device and an adding method, including a synergist for improving the oxygen flame temperature of natural gas, the synergist for improving the oxygen flame temperature of natural gas contains the following components in a mass ratio: 3% ferrocene, 1% tetrahydrofuran, 2% aluminum sec-butyl alcohol, 70% pentane and 24% propadiene.

[0020] A preparation method of a synergist for improving the oxygen flame temperature of natural gas, comprising the following steps: S1: preparing a ferrocene solution, injecting 3% ferrocene into a mixing dewar flask 2, then injecting 1% tetrahydrofuran into the mixing dewar flask 2, diluting and dissolving the ferrocene to obtain a ferrocene solution.

[0021] Ferrocene as a fuel additive can effectively improve the combustion performance and act as a combustion catalyst. It is dissolved in organic solvents such as tetrahydrofuran. Tetrahydrofuran is relatively stable in nature and can undergo ring-opening reaction, oxidation reaction and other reactions under certain conditions. As a solvent, it can effectively dissolve ferrocene and participate in mixed combustion. The heat value of pentane is 48642 kj / mol, which can improve the heat value of gas.

[0022] S2: preparing a combustion rate synergistic solution, injecting 2% of aluminum sec-butyl alcohol into the mixing dewar flask 2 to obtain a combustion rate synergistic solution.

[0023] Aluminum sec-butyl alcohol can increase the combustion rate.

[0024] S3: preparing a heat value rate synergistic solution, injecting 70% of pentane into the mixing dewar flask 2 to obtain a heat value rate synergistic solution.

[0025] Pentane can further dilute ferrocene, and the gasification temperature of pentane is 36 degrees Celsius, which is in a solution state at this time.

[0026] S4: preparing a non-low-temperature natural gas synergist, injecting 24% of propadiene into the mixing dewar flask 2 to obtain a non-low-temperature natural gas synergist.

[0027] Propadiene is injected in liquid state to further improve the heat value of gas.

[0028] S5: preparing a finished natural gas synergist, injecting the non-low-temperature natural gas synergist into the liquid nitrogen heat exchange tank 1 for low-temperature cooling, the cooling temperature is-160 DEG C, and the finished natural gas synergist is obtained.

[0029] The finished natural gas synergist is close to the temperature of liquid natural gas (-162 DEG C), and the synergist is in a low-temperature liquid state at-160 DEG C. Mixing with liquid natural gas, after liquefied natural gas is gasified, it can be directly used in welding conditions. This low-temperature liquid mixing mode has smaller liquid molecular spacing and more uniform mixing.

[0030] At the same time, the finished natural gas synergist can be gasified into a gaseous state by the water bath gasifier 6 and connected to the natural gas pipeline to form a gas-gas mixture with gaseous natural gas. After the unit volume of liquefied natural gas is gasified, the volume increases by 600 times. This mode of mixing can achieve small volume and large energy, which is convenient for storage and transportation. The mixed natural gas can be directly used in welding and cutting conditions. The synergist and natural gas are both gaseous molecules with similar intermolecular distances, so the mixture is fully and uniformly mixed, and it is beneficial for long-distance transportation.

[0031] The finished natural gas synergist can effectively improve the unit heat value of natural gas. When burning with oxygen, the burning rate can be increased to the same as acetylene, making the oxygen flame temperature higher and the cutting and welding speed faster. Compared with the current gaseous natural gas and liquid additive mixing mode, the gas quality performance is more stable, the combustion is more complete, and it is convenient for storage, transportation and pipeline transportation. The use of one ton of natural gas added with the finished natural gas synergist can reduce 0.65 tons of CO2 emission compared with acetylene, and the comprehensive cost of gas can be reduced by 40%.

[0032] An additive device for a synergist that improves the oxygen flame temperature of natural gas, comprising a finished Dewar flask 3, a natural gas storage tank 4, a natural gas welding and conveying pipeline 5, a water bath gasifier 6 and a PLC controller 7. The liquid inlet end of the finished Dewar flask 3 is connected to the liquid outlet end of the liquid nitrogen heat exchange tank 1. The liquid outlet end of the finished Dewar flask 3 is provided with a total liquid outlet pipe 8. The end of the total liquid outlet pipe 8 away from the Dewar flask is provided with a first liquid outlet pipe 9 and a second liquid outlet pipe 10. The first liquid outlet pipe 9 is connected to the liquid inlet end of the natural gas storage tank 4. The second liquid outlet pipe 10 is connected to the water bath gasifier 6. The water bath gasifier 6 is connected to the natural gas welding and conveying pipeline 5 through a gasification conveying pipeline 11.

[0033] The additive device has two modes. When the synergist and natural gas are mixed in liquid-liquid mode, the finished natural gas synergist in a low-temperature liquid state is mixed with liquid natural gas. In this mode, the finished natural gas synergist in a low-temperature liquid state is stored in the finished Dewar flask 3. Then, through the valve control of the total liquid outlet pipe 8 and the first liquid outlet pipe 9, the finished natural gas synergist is sent to the inside of the natural gas storage tank 4 under pressure, and mixed with the liquid natural gas inside the natural gas storage tank 4.

[0034] When the synergist and natural gas are mixed in a gas-gas mode, the finished natural gas synergist in a low-temperature liquid state is sent to the inside of the water bath gasifier 6. The finished natural gas synergist is sent to the water bath gasifier 6 through the valve control of the total liquid outlet pipe 8 and the second liquid outlet pipe 10. After gasification in the water bath gasifier 6, it becomes a gaseous state, and is then connected to the natural gas welding and conveying pipeline 5 through the gasification conveying pipeline 11, so that the gaseous natural gas synergist can be mixed with natural gas in a gas-gas mode inside the natural gas welding and conveying pipeline 5.

[0035] The gasification conveying pipeline 11 is provided with an additive flow valve 12 and an additive flow meter 13, and the natural gas welding conveying pipeline 5 is provided with a natural gas flow valve 14 and a natural gas flow meter 15, and the additive flow valve 12, the additive flow meter 13, the natural gas flow valve 14 and the natural gas flow meter 15 are electrically connected with the PLC controller 7.

[0036] In order to ensure the ratio of gaseous finished natural gas synergist and natural gas, the additive flow meter 13 and the natural gas flow meter 15 are used for flow monitoring, and feedback to the PLC controller 7, and then the natural gas flow valve 14 and the additive flow valve 12 are controlled by the PLC controller 7, so that the ratio of finished natural gas synergist and natural gas can be controlled.

[0037] The ratio of finished natural gas synergist and natural gas is 5%:95%.

[0038] The natural gas mixed with 5% of finished natural gas synergist has the safety and environmental protection of natural gas, the oxygen flame temperature can reach above 3200 DEG C, the cutting and welding efficiency is higher, and the finished natural gas synergist can completely replace acetylene and can be used for flame cutting and metal welding of various metal materials.

[0039] The finished natural gas synergist can be mixed with liquefied natural gas at-160 DEG C in a liquid state, and the liquefied natural gas after mixing can be directly used in welding and cutting conditions after gasification, the liquid molecular spacing is smaller, the mixing is more uniform, and the long-distance transportation is facilitated, and the liquefied natural gas can be gasified and mixed with pipeline natural gas in a gaseous state, the gaseous molecular spacing is similar, the mixing is uniform, and the long-distance pipeline transportation is facilitated.

[0040] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited to the scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the present application.

Claims

1. A synergist for increasing the temperature of a natural gas oxygen flame, characterized in that: The enhancer for increasing the temperature of a natural gas oxygen flame contains the following components in the following proportions by mass: 3% ferrocene, 1% tetrahydrofuran, 2% aluminum sec-butoxide, 70% pentane and 24% propylene.

2. The method for preparing an enhancer to increase the temperature of a natural gas oxygen flame according to claim 1, characterized in that: Includes the following steps: S1: To prepare a ferrocene solution, 3% ferrocene is injected into a mixed Dewar flask, and then 1% tetrahydrofuran is injected into the mixed Dewar flask to dilute and dissolve the ferrocene to obtain a ferrocene solution. S2: To prepare a combustion rate enhancing solution, 2% aluminum sec-butoxide is injected into the mixed Dewar flask to obtain the combustion rate enhancing solution; S3: To prepare a calorific value rate-enhancing solution, 70% pentane is injected into the mixed Dewar flask to obtain the calorific value rate-enhancing solution; S4: To prepare a non-cryogenic natural gas enhancer, 24% propylene is injected into the mixed Dewar flask to obtain the non-cryogenic natural gas enhancer; S5: Prepare the finished natural gas enhancer by injecting the non-cryogenic natural gas enhancer into an injection liquid nitrogen heat exchange tank for cryogenic cooling at a temperature of -160°C, and then injecting it into a finished Dewar flask to obtain the finished natural gas enhancer.

3. The device for adding an synergist to enhance the temperature of a natural gas oxygen flame according to claim 2, characterized in that: The system includes a finished Dewar flask, a natural gas storage tank, a natural gas welding and cutting pipeline, a water bath vaporizer, and a PLC controller. The inlet end of the finished Dewar flask is connected to the outlet end of the liquid nitrogen heat exchange tank. A main outlet pipe is installed at the outlet end of the finished Dewar flask. A first outlet pipe and a second outlet pipe are connected to the end of the main outlet pipe away from the Dewar flask. The first outlet pipe is connected to the inlet end of the natural gas storage tank, and the second outlet pipe is connected to the water bath vaporizer. The water bath vaporizer is connected to the natural gas welding and cutting pipeline through a vaporization pipeline.

4. The device for adding an synergist to enhance the temperature of a natural gas oxygen flame according to claim 3, characterized in that: The gasification transmission pipeline is equipped with an additive flow valve and an additive flow meter, and the natural gas welding and cutting transmission pipeline is equipped with a natural gas flow valve and a natural gas flow meter. The additive flow valve, the additive flow meter, the natural gas flow valve, and the natural gas flow meter are all electrically connected to the PLC controller.

5. A method for adding an synergist using the adding device according to claim 4, characterized in that: The ratio of the finished natural gas enhancer to natural gas is 5%:95%.

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