A synergist for increasing the temperature of natural gas oxygen flame, a preparation method, and an adding device and method thereof

Abstract

The 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, an adding device and an adding method, which can realize stable mixing, improve unit combustion heat value and combustion rate, improve the oxygen flame temperature to above 3200 DEG C, and cut and weld faster. The synergist can be added into liquefied natural gas at an environment of -160 DEG C to realize liquid mixing, the liquefied natural gas after mixing can directly enter a welding and cutting working condition after being gasified, the liquid molecular spacing is smaller, the mixing is more sufficient and uniform, long-distance transportation is facilitated, the liquefied natural gas can be gasified into a gaseous state, gaseous mixing with pipeline natural gas is realized, the gaseous molecular spacing is similar, the mixing is sufficient and uniform, and long-distance pipeline transportation is facilitated.

Description

Technical Field

[0001] This invention relates to the field of synergists for increasing the temperature of natural gas oxy-flame, and in particular to a synergist for increasing the temperature of natural gas oxy-flame, its preparation method, and its addition equipment and method. Background Technology

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

[0003] Because the temperature of the natural gas oxygen flame is relatively low, it is suitable for cutting thin metal materials. For thicker metal materials, propane and acetylene are still used, and they cannot replace acetylene for metal welding.

[0004] To address the applicability of natural gas as a fuel for metal welding and cutting in various metal flame cutting and welding processes, as well as its safety and environmental friendliness during production and use, it is necessary to research and develop environmentally friendly natural gas enhancement additives.

[0005] Meanwhile, the current common natural gas efficiency enhancement addition mode is a gas-liquid mixing mode that uses gaseous natural gas at room temperature to inject liquid enhancers. The principle is to inject the additive intermittently into the natural gas in the form of fine droplets through the injection pump. The fine droplets are mixed by relying on the flow rate of natural gas. The uniformity of this mixing method needs to be improved. The unit calorific value and combustion rate of the mixed natural gas cannot reach the optimal level. It cannot replace propane for metal cutting of more than 400mm or replace acetylene for metal welding. Moreover, the liquid additive is prone to settling and adhering to the wall during long-distance pipeline transportation.

[0006] Therefore, in view of the shortcomings of the existing technology, it is necessary to provide an enhancer for increasing the temperature of natural gas oxygen flame, its preparation method, and its addition equipment and method to solve the shortcomings of the existing technology. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies by providing an enhancer for increasing the oxy-flame temperature of natural gas, its preparation method, and its addition equipment and method. This enhancer can achieve stable mixing while increasing the unit calorific value and combustion rate through its components, raising the oxy-flame temperature to over 3200 degrees Celsius, resulting in faster cutting and welding speeds. It can also be added to liquefied natural gas (LNG) at -160°C for liquid mixing. After mixing, the LNG can be directly used in welding and cutting operations after gasification. This low-temperature liquid mixing mode results in smaller intermolecular spacing, more thorough and uniform mixing, and is beneficial for long-distance transportation. It can also be gasified and mixed with pipeline natural gas. Since both are gaseous molecules with similar intermolecular spacing, the mixing is thorough and uniform, which is also beneficial for long-distance pipeline transportation.

[0008] The above-mentioned objectives of the present invention are achieved by the following technical means.

[0009] An enhancer for increasing the temperature of a natural gas oxy-flame is provided. The enhancer for increasing the temperature of a natural gas oxy-flame comprises the following components in the following mass ratio: 3% ferrocene, 1% tetrahydrofuran, 2% aluminum sec-butoxide, 70% pentane and 24% propylene.

[0010] Specifically, a method for preparing an enhancer to increase the temperature of a natural gas oxygen flame includes the following steps:

[0011] S1: To prepare a ferrocene solution, 3% ferrocene was injected into a mixing Dewar flask, and then 1% tetrahydrofuran was injected into the mixing Dewar flask to dilute and dissolve the ferrocene to obtain a ferrocene solution.

[0012] S2: To prepare a combustion rate enhancing solution, 2% aluminum sec-butoxide was injected into a mixing Dewar flask to obtain the combustion rate enhancing solution;

[0013] S3: To prepare a calorific value rate-enhancing solution, 70% pentane is injected into a mixing Dewar flask to obtain the calorific value rate-enhancing solution.

[0014] S4: To prepare a non-cryogenic natural gas enhancer, 24% propylene was injected into a mixed Dewar flask to obtain the non-cryogenic natural gas enhancer.

[0015] S5: Prepare an enhancer for the oxygen flame temperature of finished natural gas. Inject the non-cryogenic natural gas enhancer into a liquid nitrogen heat exchange tank for cryogenic cooling at a temperature of -160℃ to obtain the enhancer for the oxygen flame temperature of finished natural gas.

[0016] Specifically, a device for adding an enhancer to increase the temperature of a natural gas oxygen flame is provided, comprising 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 a 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 furthest from the finished 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.

[0017] Specifically, 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, additive flow meter, natural gas flow valve, and natural gas flow meter are all electrically connected to the PLC controller.

[0018] Specifically, the mass ratio of the enhancer for improving the oxygen flame temperature of the finished natural gas to the natural gas is 5%:95%.

[0019] This invention achieves stable mixing through the components of the synergist, while simultaneously increasing the unit calorific value and combustion rate, raising the oxygen flame temperature to over 3200 degrees Celsius, resulting in faster cutting and welding speeds. It can also be added to liquefied natural gas (LNG) at -160°C for liquid mixing. After mixing, the LNG is vaporized and can be directly used in welding and cutting operations. This low-temperature liquid mixing mode results in smaller intermolecular spacing, more thorough and uniform mixing, and facilitates long-distance transportation. It can also be vaporized into a gaseous state and mixed with pipeline natural gas. Since both are gaseous molecules with similar intermolecular spacing, the mixing is thorough and uniform, and it is also beneficial for long-distance pipeline transportation. Attached Figure Description

[0020] The invention will be further described with reference to the accompanying drawings, but the contents of the drawings do not constitute any limitation on the invention.

[0021] Figure 1 This is a schematic diagram of the connection of an additive device for increasing the temperature of a natural gas oxygen flame according to the present invention.

[0022] from Figure 1 Including:

[0023] 1. Liquid nitrogen heat exchanger;

[0024] 2. Mixing Dewar flasks;

[0025] 3. Finished Dewar flasks;

[0026] 4. Natural gas storage tanks;

[0027] 5. Natural gas welding and cutting pipelines;

[0028] 6. Water bath vaporizer;

[0029] 7. PLC controller;

[0030] 8. Main outlet pipe;

[0031] 9. First outlet pipe;

[0032] 10. Second outlet pipe;

[0033] 11. Gasification and transmission pipeline;

[0034] 12. Additive flow valve;

[0035] 13. Additive flow meter;

[0036] 14. Natural gas flow valve;

[0037] 15. Natural gas flow meter. Detailed Implementation

[0038] The present invention will be further described in conjunction with the following embodiments.

[0039] Example 1:

[0040] like Figure 1 As shown, an enhancer for increasing the temperature of a natural gas oxygen flame, its preparation method, and its addition equipment and method are disclosed. The enhancer for increasing the temperature of a natural gas oxygen flame comprises the following components in the following mass ratio: 3% ferrocene, 1% tetrahydrofuran, 2% aluminum sec-butoxide, 70% pentane, and 24% propylene.

[0041] A method for preparing an enhancer to increase the temperature of a natural gas oxygen flame includes the following steps:

[0042] S1: To prepare a ferrocene solution, 3% ferrocene is injected into a mixing Dewar flask 2, and then 1% tetrahydrofuran is injected into the mixing Dewar flask 2 to dilute and dissolve the ferrocene solution.

[0043] Ferrocene, as a fuel additive, can effectively improve combustion performance and act as a combustion catalyst. It is soluble in organic solvents such as tetrahydrofuran. Tetrahydrofuran is relatively stable and can undergo ring-opening and oxidation reactions under certain conditions. As a solvent, it can effectively dissolve ferrocene and participate in mixed combustion. Pentane has a calorific value of 48642 kJ / mol, which can increase the calorific value of the gas.

[0044] S2: To prepare a combustion rate enhancing solution, 2% aluminum sec-butoxide was injected into a mixing Dewar flask 2 to obtain the combustion rate enhancing solution.

[0045] Aluminum sec-butoxide can increase the rate of combustion.

[0046] S3: Prepare a calorific rate-enhancing solution by injecting 70% pentane into a mixed Dewar flask 2 to obtain a calorific rate-enhancing solution.

[0047] Pentane can further dilute ferrocene, and pentane has a vaporization temperature of 36 degrees Celsius, at which point it is in a solution state.

[0048] S4: To prepare a non-cryogenic natural gas enhancer, 24% propylene was injected into a mixed Dewar flask 2 to obtain the non-cryogenic natural gas enhancer.

[0049] Propylene is injected in liquid form to further increase the calorific value of the gas.

[0050] S5: Prepare an enhancer for the oxygen flame temperature of finished natural gas. Inject the non-cryogenic natural gas enhancer into liquid nitrogen heat exchange tank 1 for cryogenic cooling at a temperature of -160℃ to obtain the enhancer for the oxygen flame temperature of finished natural gas.

[0051] The synergist for the oxygen flame temperature of finished natural gas is close to the temperature of liquefied natural gas (-162℃). At -160℃, the synergist is in a low-temperature liquid state and mixed with liquefied natural gas. After mixing, the liquefied natural gas can be directly used in welding and cutting operations after gasification. This low-temperature liquid mixing mode results in more thorough and uniform mixing because the liquid molecules are closer together.

[0052] Meanwhile, the enhancer for the oxygen flame temperature of the finished natural gas can be vaporized into a gaseous state through a water bath vaporizer 6 and connected to the natural gas pipeline to form a gas-gas mixture with the gaseous natural gas. After the unit volume of liquefied natural gas is vaporized into a gaseous state, the volume increases by 600 times. This mixing mode can achieve large energy in small volume, which is convenient for storage and transportation. The mixed natural gas can be directly used in welding and cutting operations. Since the enhancer and natural gas are both gaseous molecules with similar spacing, the mixing is thorough and uniform, which is conducive to long-distance transportation.

[0053] The oxy-flame temperature enhancer for finished natural gas can effectively increase the unit calorific value of natural gas. During oxygen-fueled combustion, it can increase the combustion rate to a level comparable to acetylene, resulting in a higher oxy-flame temperature and faster cutting and welding speeds. Furthermore, due to the different mixing mode compared to the currently commonly used mixing mode of gaseous natural gas and liquid additives, the gas properties are more stable, combustion is more complete, and it is easier to store, transport, and pipeline. For every ton of natural gas with the oxy-flame temperature enhancer added, CO2 emissions can be reduced by 0.65 tons compared to acetylene, and the overall cost of gas use can be reduced by 40%.

[0054] An additive device for enhancing the temperature of a natural gas oxygen flame includes a finished Dewar flask 3, a natural gas storage tank 4, a natural gas welding and cutting conveying pipeline 5, a water bath vaporizer 6, and a PLC controller 7. The inlet end of the finished Dewar flask 3 is connected to the outlet end of a liquid nitrogen heat exchange tank 1. A main outlet pipe 8 is installed at the outlet end of the finished Dewar flask 3. A first outlet pipe 9 and a second outlet pipe 10 are connected to the end of the main outlet pipe 8 away from the finished Dewar flask. The first outlet pipe 9 is connected to the inlet end of the natural gas storage tank 4. The second outlet pipe 10 is connected to the water bath vaporizer 6. The water bath vaporizer 6 is connected to the natural gas welding and cutting conveying pipeline 5 through a vaporization conveying pipeline 11.

[0055] The addition equipment has two modes. When the enhancer is mixed with natural gas, the enhancer of the oxygen flame temperature of the finished natural gas in low temperature liquid state is mixed with the liquefied natural gas. In this method, the enhancer of the oxygen flame temperature of the finished natural gas in low temperature liquid state is stored in the finished product Dewar bottle 3. Then, through the valve control of the main liquid outlet pipe 8 and the first liquid outlet pipe 9, the enhancer of the oxygen flame temperature of the finished natural gas is pressurized and sent into the interior of the natural gas storage tank 4 to mix with the liquefied natural gas inside the natural gas storage tank 4.

[0056] When the enhancer is mixed with natural gas, the low-temperature liquid enhanced agent of the finished natural gas at the oxygen flame temperature is sent into the water bath gasifier 6. The enhanced agent of the finished natural gas at the oxygen flame temperature is sent into the water bath gasifier 6 through the valves of the main liquid outlet pipe 8 and the second liquid outlet pipe 10. After being vaporized in the water bath gasifier 6, it becomes gaseous and is then connected to the natural gas welding and cutting conveying pipe 5 through the gasification conveying pipe 11, so that the gaseous natural gas enhanced agent can be mixed with natural gas inside the natural gas welding and cutting conveying pipe 5.

[0057] An additive flow valve 12 and an additive flow meter 13 are installed on the gasification transmission pipeline 11, and a natural gas flow valve 14 and a natural gas flow meter 15 are installed on the natural gas welding and cutting transmission pipeline 5. The additive flow valve 12, the additive flow meter 13, the natural gas flow valve 14, and the natural gas flow meter 15 are all electrically connected to the PLC controller 7.

[0058] To ensure the ratio of the enhancer to natural gas for the oxygen flame temperature of the finished natural gas, an additive flow meter 13 and a natural gas flow meter 15 are used to monitor the flow and feed it back to the PLC controller 7. The PLC controller 7 then controls the natural gas flow valve 14 and the additive flow valve 12, so that the ratio of the enhancer to natural gas for the oxygen flame temperature of the finished natural gas can be controlled.

[0059] The mass ratio of the enhancer for improving the oxygen flame temperature of the finished natural gas to the natural gas is 5%:95%.

[0060] The additive for enhancing the oxygen flame temperature of finished natural gas, when mixed with natural gas at a mass ratio of 5%, maintains the safety and environmental friendliness of natural gas while achieving an oxygen flame temperature of over 3200℃. This results in higher cutting and welding efficiency, making it a complete substitute for acetylene and suitable for flame cutting and metal welding of various metal materials.

[0061] This invention achieves stable mixing through the components of the synergist, while simultaneously increasing the unit calorific value and combustion rate, raising the oxygen flame temperature to over 3200 degrees Celsius, resulting in faster cutting and welding speeds. It can also be added to liquefied natural gas (LNG) at -160°C for liquid mixing. After mixing, the LNG is vaporized and can be directly used in welding and cutting operations. This low-temperature liquid mixing mode results in smaller intermolecular spacing, more thorough and uniform mixing, and facilitates long-distance transportation. It can also be vaporized into a gaseous state and mixed with pipeline natural gas. Since both are gaseous molecules with similar intermolecular spacing, the mixing is thorough and uniform, and it is also beneficial for long-distance pipeline transportation.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

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 product enhancer for increasing the temperature of the oxygen flame of natural gas. Inject the non-cryogenic natural gas enhancer into a liquid nitrogen heat exchange tank for cryogenic cooling at a temperature of -160°C, and then inject it into the finished product Dewar flask to obtain the finished product enhancer for increasing the temperature of the oxygen flame of natural gas.

3. A method of using the synergist according to claim 1, characterized in that: The mass ratio of the synergist that increases the temperature of the natural gas oxygen flame to the natural gas is 5%:95%.

4. The method of use according to claim 3, characterized in that: The equipment used in this method 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 of the finished Dewar flask is connected to the outlet of the liquid nitrogen heat exchange tank. A main outlet pipe is installed at the outlet 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 finished Dewar flask. The first outlet pipe is connected to the inlet 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. An enhancer that increases the temperature of the natural gas oxygen flame is added to the finished Dewar flask.

5. The method of use according to claim 4, characterized in that: The gasification transmission pipeline used in this method 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.

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