Sulfur steam preparation method

Abstract

The invention discloses a sulfur vapor preparation method which is characterized by comprising the following steps: heating to obtain a primary sulfur melt; carrying out secondary heating on the primary sulfur solution to obtain a secondary sulfur solution; metering and conveying the secondary sulfur melt into an atomization device through a pump body; atomizing the secondary sulfur melt in a gasification container through an atomizing device to obtain atomized sulfur melt; part of the atomized sulfur melt in the gasification container is gasified into sulfur vapor, and the remaining atomized sulfur melt is deposited into deposited sulfur melt; when the pressure in the gasification container reaches a preset range, starting to open an exhaust port in the upper top surface of the gasification container to communicate the gasification container with the sulfur vapor using container; a liquid outlet located in the narrow bottom face of the gasification container is opened, the sulfur melt deposited in the gasification container is recycled and mixed with the primary sulfur melt, and secondary heating is conducted; pure sulfur steam is efficiently prepared at a low temperature, and the sulfur steam enters use equipment without being powered by other gases.

Description

Technical Field

[0001] The present invention relates to the field of sulfur vapor, and in particular to the technical field of a method for preparing sulfur vapor. Background Art

[0002] Sulfur vapor is a crucial raw material for growing intraocular crystals (IOCs) using chemical vapor deposition (CVD). Currently, the commonly used method involves heating sulfur to 444.6°C in a crucible until the liquid sulfur boils, producing sulfur vapor. High-purity helium is then injected into the crucible to agitate the liquid sulfur, causing it to boil and generate more sulfur vapor. The helium then carries the sulfur vapor into the IOC reactor. However, due to the high density and boiling point of liquid sulfur at 444.6°C, sulfur evaporation efficiency is very slow, resulting in a very small amount of sulfur vapor generated per unit time. This results in very slow IOC growth, with approximately 20 kg of growth occurring in approximately 20 days, severely limiting IOC manufacturing efficiency. Furthermore, conventional methods require sulfur vapor to be introduced into the device via an inert gas, resulting in a low sulfur vapor concentration within the device, which impacts the reaction rate and further reduces production efficiency. Furthermore, due to the ignition point of sulfur at approximately 250°C, the high temperature during sulfur vapor preparation poses a high safety risk during production.

[0003] Therefore, how to achieve efficient and low-temperature preparation of pure sulfur vapor, and how to allow the sulfur vapor to enter the equipment without the need for other gases to provide power, has become a difficult problem that continues to be solved in this field. Summary of the Invention

[0004] In order to solve the above technical problems, a sulfur vapor preparation method is provided, which can achieve efficient and low-temperature preparation of pure sulfur vapor, and the sulfur vapor does not need other gases to provide power when entering the use equipment.

[0005] According to the present invention, there is provided a method for preparing sulfur vapor, comprising the following steps:

[0006] The sulfur element is placed in a sulfur storage tank and heated for the first time to obtain a primary sulfur melt;

[0007] The primary sulfur melt is subjected to secondary heating to obtain a secondary sulfur melt;

[0008] The secondary sulfur melt is metered and delivered to the atomizing device through the pump body;

[0009] Atomizing the secondary sulfur melt in the gasification container through an atomizing device to obtain an atomized sulfur melt;

[0010] Part of the atomized sulfur melt in the gasification container is gasified into sulfur vapor, and the remaining atomized sulfur melt is deposited into deposited sulfur melt;

[0011] After the preset pressure range is reached inside the gasification container, the exhaust port located on the upper top surface of the gasification container is opened to connect the gasification container with the sulfur vapor usage container;

[0012] The drain port located at the bottom surface of the gasification container is opened to recover the deposited sulfur melt in the gasification container and mix it with the primary sulfur melt for secondary heating;

[0013] Preferably, the atomization device includes an atomizing nozzle; more preferably, the atomization device includes a liquid inlet channel, a first container, a dispersion device, and a fourth heating pipe sleeved outside the first container, and the temperature of the fourth liquid heat source in the fourth heating pipe is 135 - 136 °C; the dispersion device is sleeved inside the first container, the dispersion device is communicated with the liquid inlet pipe, and the liquid separation device includes a side wall and a liquid separation device housing with a plurality of liquid outlet fine holes provided at the bottom, and a liquid separation wheel rotatably connected to the liquid separation device housing; a liquid outlet cavity is formed between the first container and the outer wall of the liquid separation device, a plurality of atomizing liquid outlet holes are provided on the bottom surface of the first container, a plurality of atomizing liquid outlet pipes are provided between the bottom surface of the first container and the liquid separation device, the liquid outlet of the atomizing liquid outlet pipe is connected to the bottom surface of the first container, the end of the atomizing liquid outlet pipe far from the bottom surface of the first container is hermetically arranged, and a plurality of pipe liquid inlet holes are provided on the side wall of the atomizing liquid outlet pipe, and the liquid outlet of the pipe liquid inlet hole is symmetrically arranged on the side wall of the liquid outlet pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: By placing sulfur in the sulfur storage tank for the first heating to obtain the primary sulfur melt, the melting of sulfur is realized, and there is no need to control the temperature uniformity and good fluidity of the sulfur melt;

[0015] Through the secondary heating of the primary sulfur melt to obtain the secondary sulfur melt, the internal temperature of the secondary sulfur melt is made uniform and stable, which is beneficial to achieving good fluidity of the secondary sulfur melt, and thus beneficial to achieving stable flow rate when the secondary sulfur melt is metered and transported by a pump body, and at the same time beneficial to achieving good atomization effect during subsequent atomization by the atomization device;

[0016] By partially gasifying the atomized sulfur melt in the gasification container into sulfur vapor and the remaining atomized sulfur melt depositing into the deposited sulfur melt, sulfur vapor is prepared at a lower temperature;

[0017] By opening the exhaust port located on the upper top surface of the gasification container to connect the gasification container with the sulfur vapor usage container after the preset pressure range is reached inside the gasification container, it is beneficial to achieve stable pressure of the obtained sulfur vapor, and thus beneficial to achieving stable flow rate of the sulfur vapor provided to the sulfur vapor usage device, and there is no need to mix and transport inert gas with sulfur vapor;

[0018] By opening the drain port at the bottom of the gasification container, the deposited sulfur melt in the gasification container is recovered and mixed with the primary sulfur melt for secondary heating, so that the deposited sulfur melt can be recycled and utilized, thereby achieving low cost when used in industrial production; at the same time, it is beneficial to control the sulfur vapor pressure in the gasification container by adjusting the flow rate of the recovered deposited sulfur melt without adjusting the flow rate of the secondary sulfur melt entering the gasification container.

[0019] Furthermore, in the process of preparing the primary sulfur melt, the temperature of the first heating is 118-122°C;

[0020] The first heating is performed by heating through an electric heating device provided in the sulfur storage tank or by heating through a liquid heat source in a first heat conducting device provided in the sulfur storage tank.

[0021] The beneficial effect of adopting the above step is that the temperature of the first heating is 118-122°C, which not only achieves the melting of elemental sulfur, but also achieves the ignition point of the primary melt temperature; it is conducive to improving work efficiency and achieving high sulfur melt output efficiency.

[0022] Furthermore, in the process of preparing the secondary sulfur melt, the maximum temperature of the second heating is 133-138°C;

[0023] and / or

[0024] The second heating is performed by heating through a liquid heat source in the second heat conducting device.

[0025] The beneficial effect of adopting the previous step is that the maximum temperature of the second heating is 133-138°C, which makes the temperature of the secondary sulfur melt uniform, thereby facilitating good fluidity of the secondary sulfur melt, thereby facilitating stable flow when the secondary sulfur melt is metered and transported by the pump body, and at the same time facilitating good atomization effect when subsequently atomized by the atomizing device; the temperature of the secondary sulfur melt is lower than the ignition point of sulfur; the safety hazard is extremely low and it is conducive to improving work efficiency, thereby achieving high sulfur melt output efficiency.

[0026] Furthermore, the second heating adopts segmented heating, specifically including initial heating, second heating, and third insulation;

[0027] The initial heating temperature is 125-128℃ and the heating time is 1-3min;

[0028] The second stage heating temperature is 133-138℃ and the heating time is 3-5min;

[0029] The third stage of heat preservation is to keep the temperature at 136-138℃ for standby use;

[0030] and / or

[0031] The second heat conduction device includes a first heating mechanism, a second heating mechanism, and a heating and heat preservation mechanism;

[0032] During the second heating process, the primary sulfur melt sequentially enters the first heating mechanism, the second heating mechanism, and the heating and heat preservation mechanism. The primary sulfur melt is initially heated in the first heating mechanism and then enters the second heating mechanism for secondary heating, and then enters the heating and heat preservation mechanism for tertiary heat preservation.

[0033] The beneficial effect of the previous step is that through the initial heating temperature of 125 - 128 °C and the heating time of 1 - 3 min; the secondary heating temperature of 133 - 138 °C and the heating time of 3 - 5 min; the tertiary heat preservation is at 136 - 138 °C for standby, realizing the stepwise temperature rise of the primary sulfur melt, improving the temperature rise efficiency, and obtaining a secondary sulfur melt with uniform temperature;

[0034] During the second heating process, the primary sulfur melt sequentially enters the first heating mechanism, the second heating mechanism, and the heating and heat preservation mechanism. The primary sulfur melt is initially heated in the first heating mechanism and then enters the second heating mechanism for secondary heating, and then enters the heating and heat preservation mechanism for tertiary heat preservation, which not only realizes the temperature rise efficiency of the primary sulfur melt but also realizes the uniform internal temperature of the secondary sulfur melt.

[0035] Furthermore, the first heating mechanism includes a first liquid delivery pipeline and a first heating pipeline sleeved outside the first liquid delivery pipeline; the first liquid delivery pipeline is arranged in a spiral shape;

[0036] The second heating mechanism includes a second liquid delivery pipeline and a second heating pipeline sleeved outside the second liquid delivery pipeline; the second liquid delivery pipeline is arranged in a spiral shape;

[0037] The heating and heat preservation mechanism includes a heat preservation liquid storage container and a third heating pipeline wound and connected to the heat preservation liquid outlet container;

[0038] One end of the first liquid delivery pipeline is communicated with the sulfur storage tank and the other end is communicated with the second liquid delivery pipeline;

[0039] The second liquid delivery pipeline is communicated with the heat preservation liquid storage container;

[0040] The first heating pipeline is connected to the first heat source storage container through a first circulation pump, the second heating pipeline is connected to the second heat source storage container through a second circulation pump; the third heating pipeline is connected to the third heat source storage container through a third circulation pump;

[0041] The primary sulfur melt sequentially enters the first liquid delivery pipeline, the second liquid delivery pipeline from the sulfur storage tank and then enters the heat preservation liquid storage container;

[0042] The temperature of the first liquid heat source in the first heating pipe is 125 - 128 °C, the temperature of the second liquid heat source in the second heating pipe is 133 - 138 °C, and the temperature of the third liquid heat source in the third heating pipe is 136 - 138 °C;

[0043] Preferably, the inner diameter of the first infusion pipe is 3 - 10 cm, and the inner diameter of the second infusion pipe is 5 - 10 cm; the length of the second infusion pipe is greater than that of the first infusion pipe; more preferably, the inner diameter of the second infusion pipe is greater than that of the first infusion pipe.

[0044] The beneficial effect of the previous step is that the first heating mechanism includes a first infusion pipe and a first heating pipe sleeved outside the first infusion pipe; realizing heating during the process of transporting the primary sulfur melt, improving work efficiency, saving process time, and making the primary sulfur melt heated evenly in this way; at the same time, since the first infusion pipe is arranged in a spiral shape, it is further beneficial to the uniform heating of the primary sulfur melt during transportation in the first infusion pipe;

[0045] With the inner diameter of the first infusion pipe being 3 - 10 cm and the inner diameter of the second infusion pipe being 5 - 10 cm, it can not only meet the transportation efficiency of the sulfur melt but also further facilitate the uniform heating of the primary sulfur melt in the first infusion pipe;

[0046] By further preferably making the inner diameter of the second infusion pipe greater than that of the first infusion pipe, it is beneficial to the dispersion of the primary sulfur melt when it enters the second infusion pipe from the first infusion pipe, further facilitating the uniform heating of the primary sulfur melt in the second infusion pipe. By making the length of the second infusion pipe greater than that of the first infusion pipe, the two-stage heating time is satisfied to be 3 - 5 min.

[0047] Further, the drain port at the bottom surface of the gasification container is connected to the heat preservation liquid storage container through a pipe and a variable-frequency pump;

[0048] The variable-frequency pump transports the deposited sulfur melt in the gasification container to the heat preservation liquid storage container.

[0049] The beneficial effect of the previous step is that the variable-frequency pump realizes the transportation of the deposited sulfur melt in the gasification container through the drain port of the gasification container to the heat preservation liquid storage container; at the same time, the variable-frequency pump realizes the regulation of the flow rate of the deposited sulfur melt, so as to control the reflux flow rate of the deposited sulfur melt and stabilize the sulfur vapor pressure in the gasification container.

[0050] Further, a heating device is provided at the bottom of the gasification container to control the temperature of the deposited sulfur melt in the gasification container to be 133 - 138 °C.

[0051] The beneficial effect of the previous step is that it is beneficial to avoid the liquefaction of the sulfur vapor in the gasification container.

[0052] Further, after the preset pressure range is reached in the gasification container, the flow rate and pressure of the secondary sulfur melt delivered to the atomization device are controlled to remain unchanged;

[0053] Detect the pressure P below the exhaust port of the gasification container. When the pressure P changes, adjust the variable-frequency pump connected to the liquid discharge port at the bottom of the gasification container to change the liquid discharge flow rate of the liquid discharge port, so as to adjust the pressure P to the preset pressure range.

[0054] Further, when the detected pressure P below the exhaust port of the gasification container increases, adjust the variable-frequency pump connected to the liquid discharge port at the bottom of the gasification container to increase the liquid discharge flow rate of the liquid discharge port. When the pressure P is adjusted to the preset pressure range, stop adjusting the liquid discharge flow rate of the liquid discharge port;

[0055] When the detected pressure P below the exhaust port of the gasification container decreases, adjust the variable-frequency pump connected to the liquid discharge port at the bottom of the gasification container to reduce the liquid discharge flow rate of the liquid discharge port. When the pressure P is adjusted to the preset pressure range, stop adjusting the liquid discharge flow rate of the liquid discharge port.

[0056] The beneficial effect of the previous step is that the pressure of the sulfur vapor in the gasification container is stabilized, so that the flow rate of the sulfur vapor entering the sulfur vapor using equipment is stabilized. At the same time, it is not necessary to adjust the flow rate of the secondary sulfur melt entering the gasification container, so that the flow rate of the sulfur vapor can be continuously, effectively and stably maintained during the use of the sulfur vapor.

[0057] Further, an adjustment valve is connected to the exhaust port on the upper top surface of the gasification container; when it is necessary to increase the flow rate of the sulfur vapor entering the sulfur vapor using container in the gasification container, the opening of the adjustment valve connected to the exhaust port is increased; when it is necessary to reduce the flow rate of the sulfur vapor entering the sulfur vapor using container in the gasification container, the opening of the adjustment valve connected to the exhaust port is reduced.

[0058] The beneficial effect of the previous step is that when it is necessary to adjust the use flow rate of the sulfur vapor, it can be achieved without adjusting the flow rate of the secondary sulfur melt entering the gasification container, which is beneficial to avoiding the problems of long adjustment time and large waste of sulfur. Specific Embodiments

[0059] To better understand the technical solution of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0060] Example 1:

[0061] This embodiment provides a method for preparing sulfur vapor, including the following steps:

[0062] Place sulfur in the sulfur storage tank for the first heating to obtain a primary sulfur melt; during the process of preparing the primary sulfur melt, the temperature of the first heating is 120°C;

[0063] The heating method for the first heating is to heat through the electric heating device provided in the sulfur storage tank.

[0064] The primary sulfur melt is subjected to secondary heating to obtain a secondary sulfur melt; during the process of preparing the secondary sulfur melt, the highest temperature for the second heating is 136 °C;

[0065] The heating method for the second heating is to heat through the liquid heat source in the second heat conduction device.

[0066] The secondary sulfur melt is metered and transported to the atomizing device through a pump; the secondary sulfur melt is atomized in the gasification container through the atomizing device to obtain an atomized sulfur melt; the atomizing device includes an atomizing nozzle;

[0067] Part of the atomized sulfur melt in the gasification container is gasified into sulfur vapor, and the remaining atomized sulfur melt is deposited as a deposited sulfur melt;

[0068] When the preset pressure range is reached inside the gasification container, the exhaust port located on the upper top surface of the gasification container is opened to connect the gasification container with the sulfur vapor usage container; a heating device is provided at the bottom of the gasification container to control the temperature of the deposited sulfur melt in the gasification container to be 136 °C.

[0069] The drain port located on the bottom surface of the gasification container is opened to recover the deposited sulfur melt in the gasification container and mix it with the primary sulfur melt for secondary heating.

[0070] When the preset pressure range is reached inside the gasification container, the flow rate and pressure of the secondary sulfur melt metered and transported to the atomizing device are controlled to remain unchanged;

[0071] The pressure below the exhaust port of the gasification container is detected as P. When the pressure P changes, the variable frequency pump connected to the drain port at the bottom surface of the gasification container is adjusted to change the liquid discharge flow rate of the drain port, so as to adjust the pressure P to the preset pressure range.

[0072] When the detected pressure P below the exhaust port of the gasification container increases, the variable frequency pump connected to the drain port at the bottom surface of the gasification container is adjusted to increase the liquid discharge flow rate of the drain port. When the pressure P is adjusted to the preset pressure range, the adjustment of the liquid discharge flow rate of the drain port is stopped;

[0073] When the detected pressure P below the exhaust port of the gasification container decreases, the variable frequency pump connected to the drain port at the bottom surface of the gasification container is adjusted to reduce the liquid discharge flow rate of the drain port. When the pressure P is adjusted to the preset pressure range, the adjustment of the liquid discharge flow rate of the drain port is stopped.

[0074] Example 2:

[0075] The same content as in Example 1 will not be elaborated here; the different solutions in this example from Example 1 are as follows:

[0076] This embodiment provides a method for preparing sulfur vapor. The temperature of the first heating is 121 °C; the maximum temperature of the second heating is 137 °C;

[0077] A heating device is provided at the bottom of the vaporization container to control the temperature of the deposited sulfur melt in the vaporization container to 137 °C.

[0078] The following contents are also included:

[0079] The second heating adopts segmented heating, specifically including initial stage heating, second stage heating, and third stage heat preservation;

[0080] The temperature of the initial stage heating is 127 °C, and the heating time is 2 min; the temperature of the second stage heating is 137 °C, and the heating time is 4 min; the third stage heat preservation is to keep warm at 137 °C for standby;

[0081] The second heat conduction device includes a first heating mechanism, a second heating mechanism, and a heating and heat preservation mechanism;

[0082] During the second heating process, the primary sulfur melt sequentially enters the first heating mechanism, the second heating mechanism, and then enters the heating and heat preservation mechanism. The primary sulfur melt undergoes initial stage heating in the first heating mechanism and then enters the second heating mechanism for second stage heating, and then enters the heating and heat preservation mechanism for third stage heat preservation.

[0083] Furthermore, the first heating mechanism includes a first liquid delivery pipeline and a first heating pipeline sleeved outside the first liquid delivery pipeline; the first liquid delivery pipeline is spirally arranged;

[0084] The second heating mechanism includes a second liquid delivery pipeline and a second heating pipeline sleeved outside the second liquid delivery pipeline; the second liquid delivery pipeline is spirally arranged;

[0085] The heating and heat preservation mechanism includes a heat preservation liquid storage container and a third heating pipeline wound and connected to the heat preservation liquid outlet container;

[0086] One end of the first liquid delivery pipeline is communicated with the sulfur storage tank, and the other end is communicated with the second liquid delivery pipeline;

[0087] The second liquid delivery pipeline is communicated with the heat preservation liquid storage container;

[0088] The first heating pipeline is connected to the first heat source storage container through a first circulation pump, the second heating pipeline is connected to the second heat source storage container through a second circulation pump; the third heating pipeline is connected to the third heat source storage container through a third circulation pump;

[0089] The primary sulfur melt sequentially enters the first liquid delivery pipeline, the second liquid delivery pipeline from the sulfur storage tank and then enters the heat preservation liquid storage container;

[0090] The temperature of the first liquid heat source in the first heating pipe is 127°C, the temperature of the second liquid heat source in the second heating pipe is 137°C, and the temperature of the third liquid heat source in the third heating pipe is 137°C;

[0091] The inner diameter of the first infusion pipe is 6 cm, and the inner diameter of the second infusion pipe is 8 cm; the length of the second infusion pipe is greater than that of the first infusion pipe; the inner diameter of the second infusion pipe is greater than that of the first infusion pipe.

[0092] An adjustment valve is connected to the exhaust port on the top surface of the vaporization container; when it is necessary to increase the flow rate of sulfur vapor entering the sulfur vapor usage container in the vaporization container, the opening of the adjustment valve connected to the exhaust port is increased; when it is necessary to reduce the flow rate of sulfur vapor entering the sulfur vapor usage container in the vaporization container, the opening of the adjustment valve connected to the exhaust port is reduced.

[0093] Example 3:

[0094] The content identical to that in Example 1 will not be elaborated here; the different solutions in this example from those in Example 1 are as follows: This example provides a method for preparing sulfur vapor, the temperature of the first heating is 119°C; the highest temperature of the second heating is 136°C; a heating device is provided at the bottom of the vaporization container to control the temperature of the deposited sulfur melt in the vaporization container to be 136°C.

[0095] It also includes the following content:

[0096] The atomization device includes a liquid inlet channel, a first container, a dispersion device, and a fourth heating pipe sleeved outside the first container. The temperature of the fourth liquid heat source in the fourth heating pipe is 136°C; the dispersion device is sleeved inside the first container and is connected to the liquid inlet pipe. The liquid separation device includes a side wall and a liquid separation device housing with a number of liquid outlet fine holes at the bottom, and a liquid separation wheel rotatably connected to the liquid separation device housing; an liquid outlet cavity is formed between the first container and the outer wall of the liquid separation device. A number of atomization liquid outlet holes are provided on the bottom surface of the first container. A number of atomization liquid outlet pipes are provided between the bottom surface of the first container and the liquid separation device. The liquid outlet of the atomization liquid outlet pipe is connected to the bottom surface of the first container. The end of the atomization liquid outlet pipe far from the bottom surface of the first container is sealed, and a number of pipe liquid inlet holes are provided on the side wall of the atomization liquid outlet pipe. The liquid outlet of the pipe liquid inlet hole is symmetrically arranged on the side wall of the liquid outlet pipe.

[0097] The second heating adopts segmented heating, specifically including initial stage heating, second stage heating, and third stage heat preservation;

[0098] The temperature of the initial stage heating is 126°C, and the heating time is 3 min;

[0099] The temperature of the second stage heating is 135°C, and the heating time is 5 min;

[0100] The three-stage heat preservation is for standby heat preservation at 136°C;

[0101] The second heat conduction device includes a first heating mechanism, a second heating mechanism, and a heating and heat preservation mechanism;

[0102] During the second heating process, the primary sulfur melt enters the first heating mechanism, the second heating mechanism, and then the heating and heat preservation mechanism in sequence. The primary sulfur melt is subjected to primary heating in the first heating mechanism, then enters the second heating mechanism for secondary heating, and then enters the heating and heat preservation mechanism for three-stage heat preservation.

[0103] The first heating mechanism includes a first liquid delivery pipeline and a first heating pipeline sleeved outside the first liquid delivery pipeline; the first liquid delivery pipeline is arranged in a spiral shape;

[0104] The second heating mechanism includes a second liquid delivery pipeline and a second heating pipeline sleeved outside the second liquid delivery pipeline; the second liquid delivery pipeline is arranged in a spiral shape;

[0105] The heating and heat preservation mechanism includes a heat preservation liquid storage container and a third heating pipeline wound and connected to the heat preservation liquid outlet container;

[0106] One end of the first liquid delivery pipeline is communicated with the sulfur storage tank, and the other end is communicated with the second liquid delivery pipeline;

[0107] The second liquid delivery pipeline is communicated with the heat preservation liquid storage container;

[0108] The first heating pipeline is connected to the first heat source storage container through a first circulation pump, the second heating pipeline is connected to the second heat source storage container through a second circulation pump; the third heating pipeline is connected to the third heat source storage container through a third circulation pump;

[0109] The primary sulfur melt enters the first liquid delivery pipeline, the second liquid delivery pipeline in sequence from the sulfur storage tank, and then enters the heat preservation liquid storage container;

[0110] The temperature of the first liquid heat source in the first heating pipeline is 126°C, the temperature of the second liquid heat source in the second heating pipeline is 135°C, and the temperature of the third liquid heat source in the third heating pipeline is 136°C;

[0111] The inner diameter of the first liquid delivery pipeline is 4 cm, and the inner diameter of the second liquid delivery pipeline is 7 cm; the length of the second liquid delivery pipeline is greater than the length of the first liquid delivery pipeline; the inner diameter of the second liquid delivery pipeline is greater than the inner diameter of the first liquid delivery pipeline.

[0112] An adjustment valve is connected to the exhaust port on the upper top surface of the gasification container; when it is necessary to increase the flow rate of the sulfur vapor entering the sulfur vapor usage container in the gasification container, the opening of the adjustment valve connected to the exhaust port is increased; when it is necessary to reduce the flow rate of the sulfur vapor entering the sulfur vapor usage container in the gasification container, the opening of the adjustment valve connected to the exhaust port is reduced.

[0113] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. A method for preparing sulfur vapor, characterized in that, It includes the following steps: Place elemental sulfur in a sulfur storage tank for the first heating to obtain a primary sulfur melt; Perform secondary heating on the primary sulfur melt to obtain a secondary sulfur melt; Meter and transport the secondary sulfur melt to an atomizing device through a pump; Atomize the secondary sulfur melt in a gasification container through the atomizing device to obtain an atomized sulfur melt; Part of the atomized sulfur melt in the gasification container is gasified into sulfur vapor, and the remaining atomized sulfur melt is deposited as a deposited sulfur melt; After the preset pressure range is reached in the gasification container, start to open the exhaust port on the top surface of the gasification container to connect the gasification container with the sulfur vapor usage container; Open the drain port at the bottom of the gasification container to recover the deposited sulfur melt in the gasification container and mix it with the primary sulfur melt for secondary heating.

2. The method for preparing sulfur vapor according to claim 1, wherein During the process of preparing the primary sulfur melt, the temperature of the first heating is 118 - 122 °C; The heating method of the first heating is to heat through the electric heating device provided in the sulfur storage tank or to heat through the liquid heat source in the first heat conduction device provided in the sulfur storage tank.

3. The method for preparing sulfur vapor according to claim 2, wherein During the process of preparing the secondary sulfur melt, the maximum temperature of the second heating is 133 - 138 °C; and / or The heating method of the second heating is to heat through the liquid heat source in the second heat conduction device.

4. The method for preparing sulfur vapor according to claim 3, characterized in that, The second heating adopts segmented heating, specifically including initial stage heating, second stage heating, and third stage heat preservation; The temperature of the initial stage heating is 125 - 128 °C, and the heating time is 1 - 3 min; The temperature of the second stage heating is 133 - 138 °C, and the heating time is 3 - 5 min; The third stage heat preservation is to keep warm for standby at 136 - 138 °C; and / or The second heat conduction device includes a first heating mechanism, a second heating mechanism, and a heating and heat preservation mechanism; During the second heating process, the primary sulfur melt sequentially enters the first heating mechanism, the second heating mechanism, and the heating and heat preservation mechanism. The primary sulfur melt undergoes initial stage heating in the first heating mechanism and then enters the second heating mechanism for second stage heating, and then enters the heating and heat preservation mechanism for third stage heat preservation.

5. The method for preparing sulfur vapor according to claim 4, wherein The first heating mechanism includes a first liquid delivery pipeline and a first heating pipeline sleeved outside the first liquid delivery pipeline; the first liquid delivery pipeline is arranged in a spiral shape; The second heating mechanism includes a second liquid delivery pipeline and a second heating pipeline sleeved outside the second liquid delivery pipeline; the second liquid delivery pipeline is arranged in a spiral shape; The heating and heat preservation mechanism includes a heat preservation liquid storage container and a third heating pipeline wound and connected to the heat preservation liquid outlet container; One end of the first liquid delivery pipeline is connected to the sulfur storage tank, and the other end is connected to the second liquid delivery pipeline; The second liquid delivery pipeline is connected to the heat preservation liquid storage container; The first heating pipeline is connected to the first heat source storage container through a first circulation pump, the second heating pipeline is connected to the second heat source storage container through a second circulation pump; the third heating pipeline is connected to the third heat source storage container through a third circulation pump; The primary sulfur melt sequentially enters the first liquid delivery pipeline, the second liquid delivery pipeline from the sulfur storage tank and then enters the heat preservation liquid storage container; The temperature of the first liquid heat source in the first heating pipeline is 125 - 128 °C, the temperature of the second liquid heat source in the second heating pipeline is 133 - 138 °C, and the temperature of the third liquid heat source in the third heating pipeline is 136 - 138 °C; Preferably, the inner diameter of the first infusion pipeline is 3 - 10 cm, and the inner diameter of the second infusion pipeline is 5 - 10 cm; the length of the second infusion pipeline is greater than that of the first infusion pipeline.

6. The method for preparing sulfur vapor according to claim 1, characterized in that, A drain port at the bottom surface of the vaporization container is connected to the heat preservation liquid storage container through a pipeline and a variable frequency pump; The variable frequency pump is used to transport the molten sulfur solution deposited in the vaporization container to the heat preservation liquid storage container.

7. The method for preparing sulfur vapor according to claim 1, characterized in that, A heating device is provided at the bottom of the vaporization container to control the temperature of the deposited molten sulfur solution in the vaporization container to be 133 - 138 °C.

8. The method for preparing sulfur vapor according to claim 7, wherein After the preset pressure range is reached inside the vaporization container, control the flow rate and pressure of the secondary molten sulfur solution metered and transported to the atomization device to remain unchanged; Detect the pressure below the exhaust port of the vaporization container as P. When the pressure P changes, adjust the variable frequency pump connected to the drain port at the bottom surface of the vaporization container to change the liquid outflow rate at the drain port, so as to adjust the pressure P to the preset pressure range.

9. The method for preparing sulfur vapor according to claim 7, characterized in that, When it is detected that the pressure P below the exhaust port of the vaporization container increases, adjust the variable frequency pump connected to the drain port at the bottom surface of the vaporization container to increase the liquid outflow rate at the drain port. When the pressure P is adjusted to the preset pressure range, stop adjusting the liquid outflow rate at the drain port; When it is detected that the pressure P below the exhaust port of the vaporization container decreases, adjust the variable frequency pump connected to the drain port at the bottom surface of the vaporization container to reduce the liquid outflow rate at the drain port. When the pressure P is adjusted to the preset pressure range, stop adjusting the liquid outflow rate at the drain port.

10. The method for preparing sulfur vapor according to claim 1, wherein An adjusting valve is connected to the exhaust port on the upper top surface of the vaporization container; when it is necessary to increase the flow rate of the sulfur vapor entering the sulfur vapor usage container in the vaporization container, increase the opening of the adjusting valve connected to the exhaust port; when it is necessary to reduce the flow rate of the sulfur vapor entering the sulfur vapor usage container in the vaporization container, reduce the opening of the adjusting valve connected to the exhaust port.