Heater protection device for molten metal catalytic hydrocarbon cracking

Abstract

The utility model discloses a heater protection device for molten metal catalytic hydrocarbon cracking, which relates to the technical field of metal liquid heaters and comprises a protection cover, the protection cover comprises a high-temperature-resistant oxidation layer and a high-temperature-resistant molten metal corrosion layer, and the high-temperature-resistant oxidation layer is provided with a first opening and an accommodating space capable of accommodating a heater. The high-temperature-resistant molten metal corrosion layer wraps the high-temperature-resistant oxidation layer, the high-temperature-resistant molten metal corrosion layer is provided with a second opening, the second opening corresponds to the first opening in position, and the heater can enter the containing space through the first opening and the second opening. And the heater can be stably used under the environment conditions of high temperature, high pressure and strong corrosion for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of metal liquid heaters, in particular to a heater protection device for molten metal catalytic cracking of hydrocarbons. Background Art

[0002] Methods for cracking hydrocarbons include high-temperature cracking, metal-catalyzed cracking, and plasma catalysis. Among them, high-temperature cracking and plasma catalysis have high energy consumption and poor process stability in the production process, and their economic and large-scale application prospects are not as good as those of molten metal catalytic cracking technology. Molten metal catalytic cracking refers to the process of passing hydrocarbon gas into a high-temperature molten metal liquid, where it is decomposed into carbon powder and hydrogen under the catalysis of the liquid metal. At present, the heating method for molten metal catalytic cracking of hydrocarbons is mainly to heat the outside of the reactor through sensors and resistance bands. For example, the patent (CN211378298U) discloses a heater protection device for molten metal catalytic cracking of hydrocarbons. The protection device includes a heater and a crucible. The heater is arranged outside the crucible. The heater is used to heat the heated object in the crucible. There are problems with the external heating equipment being large in size and having low thermal efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a heater protection device for molten metal catalytic hydrocarbon cracking to solve the problems existing in the above-mentioned prior art, so that the heater can be inserted into the reactor to directly heat the metal solution, and the heater can be used for a long time in a high temperature, high pressure and molten metal environment.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides a heater protection device for molten metal catalytic cracking of hydrocarbons, comprising a protective cover, wherein the protective cover comprises a high-temperature resistant oxidation layer and a high-temperature molten metal corrosion-resistant layer, the high-temperature resistant oxidation layer having a first opening and a accommodating space capable of accommodating a heater, the high-temperature molten metal corrosion-resistant layer being wrapped around the outside of the high-temperature resistant oxidation layer, the high-temperature molten metal corrosion-resistant layer having a second opening, the second opening corresponding to the position of the first opening, and the heater being able to enter the accommodating space through the first opening and the second opening.

[0006] Preferably, the high-temperature molten metal corrosion-resistant layer is a metal material layer that is resistant to high temperatures and metal solution corrosion.

[0007] Preferably, the high temperature oxidation resistant layer is a metal material layer that is resistant to high temperature oxidation and impact.

[0008] Preferably, a buffer layer is provided between the high temperature molten metal corrosion resistant layer and the high temperature oxidation resistant layer.

[0009] Preferably, the heater protection device for molten metal catalytic hydrocarbon cracking also includes a leakage alarm, the buffer layer is an insulating buffer layer, a leakage alarm layer is provided in the insulating buffer layer, the first end of the leakage alarm is electrically connected to the leakage alarm layer, and the second end of the leakage alarm is used to be inserted into the metal solution.

[0010] Preferably, the insulating buffer layer is a layer of high-temperature insulating and thermally conductive powder material, and the leakage alarm layer is a high-temperature resistant and electrically conductive metal material.

[0011] Preferably, the protective cover further has a connecting portion, and the connecting portion is used to fix the protective cover on the reactor.

[0012] Preferably, the liquid leakage alarm includes an alarm light and an alarm bell, one end of each of the alarm light and the alarm bell is electrically connected to the liquid leakage alarm layer, and the other end is used to be inserted into the metal solution.

[0013] Preferably, the heater protection device for molten metal catalytic hydrocarbon cracking further comprises a heater, and the heater can be inserted into the accommodation space.

[0014] Preferably, the heater protection device is used to be inserted into the reactor to heat the metal solution.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] The utility model provides a heater protection device for molten metal catalytic cracking of hydrocarbons, which includes a high-temperature oxidation layer and a high-temperature molten metal corrosion layer. The high-temperature molten metal corrosion layer is wrapped around the outside of the high-temperature oxidation layer, and the heater is inserted into the inside of the high-temperature oxidation layer. The high-temperature oxidation layer has the ability to resist high-temperature oxidation, and the high-temperature molten metal corrosion layer has the ability to resist high-temperature corrosion. Therefore, the entire protection device has the ability to resist high temperature, high pressure and corrosion. The metal solution can be directly heated by inserting the heater into the reactor, and the heater can be used stably for a long time under high-temperature, high-pressure and highly corrosive environmental conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1This is a schematic structural diagram of a heater protection device for molten metal catalytic hydrocarbon cracking in one embodiment of the present invention;

[0019] Figure 2 This is a schematic structural diagram of a protective cover in one embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the heater protection device in use in one embodiment of the present invention;

[0021] Among them: 1-high temperature molten metal corrosion resistant layer; 2-buffer layer; 3-leakage alarm layer; 4-high temperature resistant oxidation layer; 5-leakage alarm; 6-connecting part; 7-protective cover. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] In a more preferred embodiment of this embodiment, the heater protection device for catalytic hydrocarbon cracking by molten metal includes a protective cover 7, which includes a high-temperature resistant oxidation layer 4 and a high-temperature molten metal corrosion-resistant layer 1. The high-temperature resistant oxidation layer 4 has a first opening and a storage space capable of accommodating a heater. The high-temperature resistant molten metal corrosion layer 1 is wrapped around the outside of the high-temperature resistant oxidation layer 4. The high-temperature resistant molten metal corrosion layer 1 has a second opening, which corresponds to the position of the first opening. The heater can enter the storage space through the first opening and the second opening. The thermal cracking reaction temperature of hydrocarbons is usually carried out under high temperature conditions of 1000-1300°C. Therefore, the entire heater protection device for catalytic hydrocarbon cracking by molten metal is required to have the ability to resist high-temperature oxidation and corrosion. The heater protection device for catalytic hydrocarbon cracking by molten metal provided by the utility model contacts the heater through the high-temperature resistant oxidation layer 4. The high-temperature resistant oxidation layer 4 is made of high-temperature resistant and oxidation-resistant materials, has high-temperature oxidation resistance, and can withstand high temperatures of 3000°C. The heater protection device contacts the molten metal through the high-temperature resistant molten metal corrosion layer 1. The high-temperature resistant molten metal corrosion layer 1 is made of high-temperature resistant molten metal corrosion-resistant materials. The heater protection device is made of a high-temperature and corrosion-resistant material, has high-temperature corrosion resistance, and can withstand a high temperature of 1500°C. Therefore, the heater protection device has the ability to resist high-temperature oxidation and corrosion. When the heater protection device is in use, it only needs to insert the heater into the protective cover 7 to directly heat the metal solution. The protective cover 7 has high-temperature oxidation and corrosion resistance. Therefore, the heater can be used stably for a long time under high-temperature, high-pressure and highly corrosive environmental conditions. The heater protection device is directly inserted into the reactor. Compared with the method of wrapping it around the outside of the reactor for heating, the heater protection device has a smaller device size and higher thermal efficiency.

[0025] In a preferred embodiment of the present invention, the high-temperature molten metal corrosion-resistant layer 1 is a metal material layer that is resistant to high temperatures and corrosion by metal solutions. The high-temperature molten metal corrosion-resistant layer 1 is preferably a molybdenum alloy material or a titanium alloy material. Molybdenum alloy materials and titanium alloy materials have high melting points, can withstand temperatures of 3000°C, can remain stable at temperatures of 1000-1300°C, and have good thermal conductivity and corrosion resistance.

[0026] In a preferred embodiment of the present invention, the high-temperature resistant oxide layer 4 is a metal layer that is resistant to high-temperature oxidation and impact. The high-temperature resistant oxide layer 4 is preferably a nickel-chromium-molybdenum alloy or an aluminum oxide material. These materials have excellent high-temperature and oxidation resistance, can withstand temperatures of 1500°C, and can operate stably at temperatures of 1000-1300°C.

[0027] In a preferred embodiment of the present invention, a buffer layer 2 is provided between the high-temperature molten metal corrosion-resistant layer 1 and the high-temperature resistant oxide layer 4. During use, the heater may be subjected to external mechanical stresses, such as vibration or impact. The buffer layer 2 can prevent mechanical stress-induced collisions between the high-temperature molten metal corrosion-resistant layer 1 and the high-temperature resistant oxide layer 4, thereby protecting the heater and extending its service life.

[0028] In a more preferred embodiment of the present invention, the heater protection device for catalytic hydrocarbon cracking by molten metal further includes a liquid leakage alarm 5, the buffer layer 2 is an insulating buffer layer, a liquid leakage alarm layer 3 is provided in the insulating buffer layer, the first end of the liquid leakage alarm 5 is electrically connected to the liquid leakage alarm layer 3, and the second end of the liquid leakage alarm 5 is used to be inserted into the metal solution. The insulating buffer layer can isolate the high-temperature corrosion-resistant layer 1 and the high-temperature oxidation-resistant layer 4, preventing the current from flowing directly from the high-temperature corrosion-resistant layer 1 to the high-temperature oxidation-resistant layer 4, thereby avoiding the occurrence of a short circuit and ensuring the safe operation of the circuit; when the high-temperature metal melt corrosion layer 1 corrodes and ruptures, the metal solution will corrode the insulating buffer layer, so that the metal solution flows to the liquid leakage alarm layer 3 through the rupture of the high-temperature metal melt corrosion layer 1. At this time, the first end and the second end of the liquid leakage alarm 5 are connected through the liquid leakage alarm layer 3 to form a circuit, and the liquid leakage alarm 5 immediately issues an alarm.

[0029] In a preferred embodiment of the present invention, the insulating buffer layer is a layer of a powder material with high-temperature insulation and thermal conductivity, and the leakage alarm layer 3 is a metal material with high-temperature resistance and electrical conductivity. The insulating buffer layer is preferably a layer of aluminum nitride powder, which has excellent high-temperature resistance, insulation and thermal conductivity; the leakage alarm layer 3 is preferably a molybdenum alloy material, which has excellent high-temperature resistance and electrical conductivity.

[0030] In a preferred embodiment of the present invention, the protective cover 7 further includes a connecting portion 6 for securing the protective cover 7 to the reactor. The connecting portion 6 secures the protective cover 7 to a specific location in the reactor and allows multiple heating devices to be used simultaneously to heat the molten metal, thereby ensuring uniform temperature distribution within the reactor and avoiding local overheating or uneven heating temperatures.

[0031] In a preferred embodiment of the present invention, the leakage alarm 5 includes an alarm light and an alarm bell. One end of each of the alarm light and the alarm bell is electrically connected to the leakage alarm layer 3, and the other end is configured to be inserted into the metal solution. If the high-temperature resistant metal melt corrosion layer 1 leaks, the alarm light and the alarm bell sound simultaneously, thereby ensuring that the alarm information can be promptly and effectively conveyed to relevant personnel, thereby improving safety management effectiveness.

[0032] In a preferred embodiment of this embodiment, the heater protection device for molten metal-catalyzed hydrocarbon cracking further includes a heater that is insertable into the receiving space. The heater is inserted into the receiving space within the heater protection device, thereby heating the molten metal through the heater protection device, preventing direct contact between the heater and the molten metal, and protecting the heater.

[0033] In a preferred embodiment of this embodiment, a heater protection device for molten metal-catalyzed hydrocarbon cracking is inserted into a reactor to heat a molten metal. The heater protection device for molten metal-catalyzed hydrocarbon cracking is inserted directly into the reactor through the side wall to heat the molten metal. The outer wall of the heater protection device is sealed to the reactor, making it more convenient and quick to use.

[0034] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A heater protection device for molten metal catalytic hydrocarbon cracking, characterized by: It includes a protective cover, which includes a high-temperature resistant oxide layer and a high-temperature molten metal corrosion layer. The high-temperature resistant oxide layer has a first opening and a storage space that can accommodate a heater. The high-temperature molten metal corrosion layer is wrapped around the outside of the high-temperature resistant oxide layer. The high-temperature molten metal corrosion layer has a second opening, and the second opening corresponds to the position of the first opening. The heater can enter the storage space through the first opening and the second opening.

2. The heater protection device for molten metal catalytic hydrocarbon cracking according to claim 1, characterized in that: The high-temperature molten metal corrosion-resistant layer is a metal material layer that is resistant to high temperatures and corrosion by metal solutions.

3. The heater protection device for molten metal catalytic hydrocarbon cracking according to claim 2, characterized in that: The high temperature oxidation resistant layer is a metal material layer that is resistant to high temperature oxidation and impact.

4. The heater protection device for molten metal catalytic hydrocarbon cracking according to claim 3, characterized in that: A buffer layer is provided between the high-temperature molten metal corrosion-resistant layer and the high-temperature oxidation-resistant layer.

5. The heater protection device for molten metal catalytic hydrocarbon cracking according to claim 4, characterized in that: The heater protection device for molten metal catalytic hydrocarbon cracking also includes a leakage alarm. The buffer layer is an insulating buffer layer, and a leakage alarm layer is provided inside the insulating buffer layer. The first end of the leakage alarm is electrically connected to the leakage alarm layer, and the second end of the leakage alarm is used to be inserted into the metal solution.

6. The heater protection device for molten metal catalytic hydrocarbon cracking according to claim 5, characterized in that: The insulating buffer layer is a high-temperature insulating and heat-conducting powder material layer, and the leakage alarm layer is a high-temperature resistant and conductive metal material.

7. The heater protection device for molten metal catalytic hydrocarbon cracking according to claim 1, characterized in that: The protective cover further has a connecting portion, which is used to fix the protective cover on the reactor.

8. The heater protection device for molten metal catalytic hydrocarbon cracking according to claim 5, characterized in that: The liquid leakage alarm includes an alarm light and an alarm bell. One end of the alarm light and the alarm bell are electrically connected to the liquid leakage alarm layer, and the other end is used to be inserted into the metal solution.

9. The heater protection device for molten metal catalytic hydrocarbon cracking according to claim 1, characterized in that: A heater is also included, and the heater is insertable into the receiving space.

10. The heater protection device for molten metal catalytic hydrocarbon cracking according to claim 8, characterized in that: The heater protection device is used to be inserted into the reactor to heat the metal solution.

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