Method and equipment for fully vaporizing liquid chlorine

Abstract

The invention relates to the technical field of liquid chlorine vaporization, in particular to a liquid chlorine full vaporization method and equipment, a second steam inlet is additionally arranged, and it is guaranteed that heat exchange in a vaporizer body is more uniform and faster; the hot water chamber at the bottom is additionally arranged, so that the exposed part of the equipment can be heated, and a process control measure is adopted, so that the heated temperature of liquid chlorine is ensured to be 71-85 DEG C and reaches the boiling point of nitrogen trichloride, the liquid chlorine is completely vaporized, and the nitrogen trichloride is prevented from being decomposed due to ultrahigh temperature; in this way, the technical problems that in the prior art, due to the fact that the bottom of a vaporization device is not heated by steam, nitrogen trichloride is extremely prone to being gathered, and large potential safety hazards exist are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid chlorine vaporization, and in particular to a method and equipment for complete vaporization of liquid chlorine. Background Art

[0002] Chlorine gas is an important basic chemical raw material, which is widely used in industries such as chemistry, metallurgy, papermaking, textile, medicine, and petroleum. During the production or use of chlorine gas, nitrogen trichloride is easily generated. Its boiling point is 71 °C, and its stability is poor, making it prone to combustion and explosion accidents. Chlorine gas is usually compressed into liquid chlorine for storage and transportation, and then vaporized into gaseous state during use to participate in the reaction.

[0003] For the vaporization of liquid chlorine, a steam direct heating liquid chlorine vaporization device disclosed in the prior art patent CN222085759U can be used to save the energy consumption of liquid chlorine vaporization. However, in the above method, the bottom of the device is not heated by steam, which easily leads to the accumulation of nitrogen trichloride and poses a great potential safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and equipment for complete vaporization of liquid chlorine, aiming to solve the technical problem that the bottom of the vaporization device in the prior art is not heated by steam, which easily leads to the accumulation of nitrogen trichloride and poses a great potential safety hazard.

[0005] To achieve the above purpose, a liquid chlorine complete vaporization equipment adopted by the present invention includes a vaporizer main body, a liquid chlorine inlet, an inner coil, a chlorine gas collecting pipe, a water injection port, an overflow port, a chlorine gas outlet, a tail gas outlet, a first liquid level meter port, a hot water outlet, a drain port, a first steam inlet, a second steam inlet, a sewage discharge port, a bottom heating component, a liquid chlorine pipeline, a chlorine gas pipeline, a tail gas pipeline, a water injection pipeline, a water outlet pipeline, a sewage discharge pipeline, a nitrogen gas pipeline, and a steam pipeline. The liquid chlorine inlet is arranged on the vaporizer main body. The inner coil is connected to the liquid chlorine inlet, and the chlorine gas collecting pipe is connected to the inner coil. The chlorine gas outlet, the tail gas outlet, and the first liquid level meter port are all connected to the chlorine gas collecting pipe. The hot water outlet, the first steam inlet, and the second steam inlet are all arranged on the vaporizer main body. The sewage discharge port is connected to the lower end of the chlorine gas collecting pipe. The bottom heating component is used for heating the bottom of the vaporizer main body;

[0006] The liquid chlorine pipeline is connected to the liquid chlorine inlet, the chlorine gas pipeline is connected to the chlorine gas outlet, the tail gas pipeline is connected to the tail gas outlet, the water injection pipeline is connected to the water injection port, the water outlet pipeline is connected to the overflow port, the sewage discharge pipeline is connected to the sewage discharge port, the nitrogen gas pipeline is connected to the sewage discharge pipeline, the drain port is connected with a first drainage pipeline, and the steam pipeline is connected to both the first steam inlet and the second steam.

[0007] Among them, the bottom heating assembly includes a hot water chamber, a second liquid level gauge port, a hot water inlet, a drain port, and a hot water pipeline. The hot water chamber is arranged on the vaporizer main body. The second liquid level gauge port, the hot water inlet, and the drain port are all arranged on the hot water chamber; the hot water pipelines are connected to both the hot water outlet and the hot water inlet.

[0008] Three thermometer ports are further arranged on the vaporizer main body.

[0009] Among them, the equipment for complete vaporization of liquid chlorine further includes a second drain pipeline, and the second drain pipeline is connected to both the drain port and the first drain pipeline.

[0010] Among them, the equipment for complete vaporization of liquid chlorine further includes a steam distributor, and the steam distributor is connected to the first steam inlet.

[0011] Among them, the equipment for complete vaporization of liquid chlorine further includes an emergency relief port and a relief pipeline. The emergency relief port is arranged on the vaporizer main body, and the relief pipeline is communicated with the emergency relief port.

[0012] Among them, the second steam inlet is located below the first steam inlet.

[0013] The present invention also provides a method for complete vaporization of liquid chlorine, which is applied to the equipment for complete vaporization of liquid chlorine as described above.

[0014] It includes the following steps:

[0015] First, open the water injection pipeline, inject softened water into the vaporizer main body, and always be in an overflow state;

[0016] Then open the steam pipeline, introduce steam into the vaporizer main body to heat the softened water. When the temperature at the bottom of the vaporizer main body reaches 73 °C, open the liquid chlorine pipeline, and the liquid chlorine enters the coil in the vaporizer main body through the liquid chlorine inlet and moves downward by gravity flow;

[0017] When the liquid chlorine moves downward, it fully contacts and exchanges heat with the hot water in the vaporizer main body, and the chlorine gas formed by vaporization gathers in the chlorine gas collecting pipe and is sent to the target location through the chlorine gas pipeline;

[0018] During the vaporization process, keep the hot water pipeline always open, draw hot water from the hot water chamber, and heat the exposed area at the bottom of the chlorine gas collecting pipe to realize the vaporization of the bottom liquid chlorine.

[0019] Among them, when the temperature at the bottom of the vaporizer main body reaches 95 °C, interlock and cut off the feed of the steam pipeline. Control the temperature at the bottom of the vaporizer main body between 73 °C and 95 °C.

[0020] Wherein, when encountering a parking or emergency condition, the liquid chlorine in the vaporizer main body is sent back to the liquid chlorine storage tank through the sewage pipeline.

[0021] A method and device for complete vaporization of liquid chlorine according to the present invention. The newly added second steam inlet in the present invention ensures more uniform and rapid heat exchange inside the vaporizer main body; the newly added hot water chamber at the bottom can heat the exposed part of the device. Coupled with process control measures, it ensures that the temperature of the heated liquid chlorine is between 71 and 85 °C, reaching the boiling point of nitrogen trichloride, realizing the complete vaporization of liquid chlorine, and also avoiding the decomposition of nitrogen trichloride at ultra-high temperatures. In this way, the technical problem in the prior art that the bottom of the vaporization device is not heated by steam, which is extremely likely to cause the accumulation of nitrogen trichloride and pose a great safety hazard, is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 is a schematic structural diagram of the device for complete vaporization of liquid chlorine according to the present invention.

[0024] Figure 2 is a partial schematic structural diagram of the device for complete vaporization of liquid chlorine according to the present invention.

[0025] 1 - vaporizer main body, 2 - liquid chlorine inlet, 3 - inner coil, 4 - chlorine gas collecting pipe, 5 - water injection port, 6 - overflow port, 7 - chlorine gas outlet, 8 - tail gas outlet, 9 - first liquid level gauge port, 10 - hot water outlet, 11 - drain port, 12 - first steam inlet, 13 - second steam inlet, 14 - sewage outlet, 15 - liquid chlorine pipeline, 16 - chlorine gas pipeline, 17 - tail gas pipeline, 18 - water injection pipeline, 19 - water outlet pipeline, 20 - sewage pipeline, 21 - nitrogen gas pipeline, 22 - steam pipeline, 23 - first drainage pipeline, 24 - thermometer port, 25 - steam distributor, 26 - hot water chamber, 27 - second liquid level gauge port, 28 - hot water inlet, 29 - drainage port, 30 - hot water pipeline, 31 - second drainage pipeline, 32 - emergency relief port, 33 - relief pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will describe in detail the embodiments of the present invention. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0027] Please refer to Figure 1 and Figure 2 wherein Figure 1 is a schematic structural view of the equipment for complete vaporization of liquid chlorine according to the present invention. Figure 2 is a schematic view of a partial structure of the equipment for complete vaporization of liquid chlorine according to the present invention.

[0028] The present invention provides an equipment for complete vaporization of liquid chlorine, including a vaporizer main body 1, a liquid chlorine inlet 2, an inner coil 3, a chlorine gas collecting pipe 4, a water injection port 5, an overflow port 6, a chlorine gas outlet 7, a tail gas outlet 8, a first liquid level gauge port 9, a hot water outlet 10, a drain port 11, a first steam inlet 12, a second steam inlet 13, a sewage discharge port 14, a bottom heating assembly, a liquid chlorine pipeline 15, a chlorine gas pipeline 16, a tail gas pipeline 17, a water injection pipeline 18, a water outlet pipeline 19, a sewage discharge pipeline 20, a nitrogen gas pipeline 21 and a steam pipeline 22. The liquid chlorine inlet 2 is arranged on the vaporizer main body 1. The inner coil 3 is connected to the liquid chlorine inlet 2, and the chlorine gas collecting pipe 4 is connected to the inner coil 3. The chlorine gas outlet 7, the tail gas outlet 8 and the first liquid level gauge port 9 are all connected to the chlorine gas collecting pipe 4. The hot water outlet 10, the first steam inlet 12 and the second steam inlet 13 are all arranged on the vaporizer main body 1. The sewage discharge port 14 is connected to the lower end of the chlorine gas collecting pipe 4. The bottom heating assembly is used for heating the bottom of the vaporizer main body 1;

[0029] The liquid chlorine pipeline 15 is connected to the liquid chlorine inlet 2, the chlorine gas pipeline 16 is connected to the chlorine gas outlet 7, the tail gas pipeline 17 is connected to the tail gas outlet 8, the water injection pipeline 18 is connected to the water injection port 5, the water outlet pipeline 19 is connected to the overflow port 6, the sewage discharge pipeline 20 is connected to the sewage discharge port 14, the nitrogen gas pipeline 21 is connected to the sewage discharge pipeline 20, the drain port 11 is connected with a first drainage pipeline 23, and the steam pipeline 22 is connected to both the first steam inlet 12 and the second steam inlet;

[0030] Three thermometer ports 24 are further arranged on the vaporizer main body 1;

[0031] The equipment for complete vaporization of liquid chlorine further includes a steam distributor 25, and the steam distributor 25 is connected to the first steam inlet 12;

[0032] The second steam inlet 13 is located below the first steam inlet 12.

[0033] For this specific embodiment, during actual use, first open the water injection pipeline 18, inject softened water into the vaporizer main body 1, and keep it in an overflow state all the time; then open the steam pipeline 22, introduce steam into the vaporizer main body 1 to heat the softened water. When the temperature at the bottom of the vaporizer main body 1 reaches 73 °C, open the liquid chlorine pipeline 15. The liquid chlorine enters the coil in the vaporizer main body 1 through the liquid chlorine inlet and moves downward by gravity flow; when the liquid chlorine moves downward, it fully contacts and exchanges heat with the hot water in the vaporizer main body 1, and the chlorine gas formed by vaporization gathers in the chlorine gas collecting pipe 4 and is sent to the target location through the chlorine gas pipeline 16;

[0034] During the vaporization process, heat the exposed area at the bottom of the chlorine gas collecting pipe 4 through the bottom heating assembly to vaporize the liquid chlorine at the bottom.

[0035] Among them, the bottom heating assembly includes a hot water chamber 26, a second liquid level gauge port 27, a hot water inlet 28, a drain port 29, and a hot water pipeline 30. The hot water chamber 26 is arranged on the vaporizer main body 1, and the second liquid level gauge port 27, the hot water inlet 28, and the drain port 29 are all arranged on the hot water chamber 26; the hot water pipeline 30 is connected to both the hot water outlet 10 and the hot water inlet 28.

[0036] For this specific embodiment, during the vaporization process, keep the hot water pipeline 30 always open, draw hot water from the hot water chamber 26, heat the exposed area at the bottom of the chlorine gas collecting pipe 4, and realize the vaporization of the liquid chlorine at the bottom.

[0037] Secondly, the equipment for complete vaporization of liquid chlorine further includes a second drain pipeline 31, and the second drain pipeline 31 is connected to both the drain port 29 and the first drain pipeline 23.

[0038] For this specific embodiment, the water in the first drain pipeline 23 and the second drain pipeline 31 can be gathered into the first drain pipeline 23 and discharged for treatment.

[0039] At the same time, the equipment for complete vaporization of liquid chlorine further includes an emergency relief port 32 and a relief pipeline 33. The emergency relief port 32 is arranged on the vaporizer main body 1, and the relief pipeline 33 is communicated with the emergency relief port 32.

[0040] For this specific embodiment, when the pressure in the vaporizer main body 1 is too high, the pressure can be released through the emergency relief port 32 and the relief pipeline 33.

[0041] When using the equipment for complete vaporization of liquid chlorine according to the present invention, during specific use, first open the water injection pipeline 18, inject softened water into the vaporizer main body 1, and always keep it in an overflow state; then open the steam pipeline 22, introduce steam into the vaporizer main body 1 to heat the softened water. When the temperature at the bottom of the vaporizer main body 1 reaches 73 °C, open the liquid chlorine pipeline 15, and the liquid chlorine enters the coil in the vaporizer main body 1 through the liquid chlorine inlet and moves downward by gravity; when the liquid chlorine moves downward, it fully contacts and exchanges heat with the hot water in the vaporizer main body 1, and the chlorine gas formed by vaporization gathers in the chlorine gas collecting pipe 4 and is sent to the target location through the chlorine gas pipeline 16;

[0042] During the vaporization process, keep the hot water pipeline 30 always open, introduce hot water from the hot water chamber 26, heat the exposed area at the bottom of the chlorine gas collecting pipe 4, and realize the vaporization of the bottom liquid chlorine.

[0043] The newly added second steam inlet 13 in the present invention ensures more uniform and rapid heat exchange inside the vaporizer main body 1; the newly added hot water chamber 26 at the bottom can heat the exposed part of the equipment. Coupled with the process control measures, it ensures that the temperature of the heated liquid chlorine is between 71 and 85 °C, reaching the boiling point of nitrogen trichloride, realizing the complete vaporization of liquid chlorine, and also avoiding the decomposition of nitrogen trichloride caused by ultra-high temperature. In this way, it solves the technical problem that the bottom of the vaporization device in the prior art is not heated by steam, which easily leads to the accumulation of nitrogen trichloride and poses a great potential safety hazard.

[0044] The present invention also provides a method for complete vaporization of liquid chlorine, which is applied to the equipment for complete vaporization of liquid chlorine as described above.

[0045] It includes the following steps:

[0046] First, open the water injection pipeline 18, inject softened water into the vaporizer main body 1, and always keep it in an overflow state;

[0047] Then open the steam pipeline 22, introduce steam into the vaporizer main body 1 to heat the softened water. When the temperature at the bottom of the vaporizer main body 1 reaches 73 °C, open the liquid chlorine pipeline 15, and the liquid chlorine enters the coil in the vaporizer main body 1 through the liquid chlorine inlet and moves downward by gravity;

[0048] When the liquid chlorine moves downward, it fully contacts and exchanges heat with the hot water in the vaporizer main body 1, and the chlorine gas formed by vaporization gathers in the chlorine gas collecting pipe 4 and is sent to the target location through the chlorine gas pipeline 16;

[0049] During the vaporization process, keep the hot water pipeline 30 always open, introduce hot water from the hot water chamber 26, heat the exposed area at the bottom of the chlorine gas collecting pipe 4, and realize the vaporization of the bottom liquid chlorine.

[0050] When the temperature at the bottom of the vaporizer main body 1 reaches 95°C, the feed of the steam pipeline 22 is cut off interlockingly. Control the temperature at the bottom of the vaporizer main body 1 between 73 and 95°C.

[0051] In case of a shutdown or an emergency condition, send the liquid chlorine in the vaporizer main body 1 back to the liquid chlorine storage tank through the sewage pipeline 20.

[0052] The above-disclosed is only a preferred embodiment of the present invention, and of course, it cannot be used to limit the scope of the rights of the present invention. Those of ordinary skill in the art can understand the whole or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A liquid chlorine full vaporization device, characterized in that: It includes a vaporizer body, a liquid chlorine inlet, an inner coil, a chlorine manifold, a water injection port, an overflow port, a chlorine outlet, a tail gas outlet, a first liquid level gauge port, a hot water outlet, a drain port, a first steam inlet, a second steam inlet, a sewage outlet, a bottom heating component, a liquid chlorine pipeline, a chlorine pipeline, a tail gas pipeline, a water injection pipeline, a water outlet pipeline, a sewage outlet, a nitrogen pipeline and a steam pipeline, wherein the liquid chlorine inlet is arranged on the vaporizer body, the inner coil is connected to the liquid chlorine inlet, and the chlorine manifold is connected to the inner coil, the chlorine outlet, the tail gas outlet and the first liquid level gauge port are all connected to the chlorine manifold, the hot water outlet, the first steam inlet and the second steam inlet are all arranged on the vaporizer body, the sewage outlet is connected to the lower end of the chlorine manifold, and the bottom heating component is used for bottom heating of the vaporizer body; The liquid chlorine pipeline is connected to the liquid chlorine inlet, the chlorine pipeline is connected to the chlorine outlet, the tail gas pipeline is connected to the tail gas outlet, the water injection pipeline is connected to the water injection port, the water outlet pipeline is connected to the overflow port, the sewage pipeline is connected to the sewage port, the nitrogen pipeline is connected to the sewage pipeline, the drain port is connected to a first drainage pipeline, and the steam pipelines are connected to the first steam inlet and the second steam.

2. The equipment for full vaporization of liquid chlorine as claimed in claim 1, characterized in that: The bottom heating assembly comprises a hot water chamber, a second liquid level gauge port, a hot water inlet, a drain port and a hot water pipeline, wherein the hot water chamber is arranged on the vaporizer body, the second liquid level gauge port, the hot water inlet and the drain port are all arranged on the hot water chamber; the hot water pipeline is connected to the hot water outlet and the hot water inlet; The vaporizer body is also provided with three thermometer ports.

3. The equipment for full vaporization of liquid chlorine as claimed in claim 2, characterized in that: The equipment for full vaporization of liquid chlorine also includes a second drainage pipeline, which is connected to the drainage port and the first drainage pipeline.

4. The equipment for full vaporization of liquid chlorine as claimed in claim 3, characterized in that: The equipment for full vaporization of liquid chlorine also includes a steam distributor, and the steam distributor is connected to the first steam inlet.

5. The equipment for full vaporization of liquid chlorine as claimed in claim 4, characterized in that: The equipment for full vaporization of liquid chlorine also includes an emergency discharge port and a discharge pipeline. The emergency discharge port is arranged on the vaporizer body, and the discharge pipeline is connected to the emergency discharge port.

6. The equipment for full vaporization of liquid chlorine as claimed in claim 5, characterized in that: The second steam inlet is located below the first steam inlet.

7. A method for full vaporization of liquid chlorine, applied to the equipment for full vaporization of liquid chlorine as claimed in claim 6, characterized in that: The steps include: First, the water injection pipeline is opened to inject softened water into the vaporizer body, and the water is always in an overflow state; Then, the steam pipeline is opened to pass steam into the vaporizer body to heat the softened water. When the temperature at the bottom of the vaporizer body reaches 73° C., the liquid chlorine pipeline is opened, and the liquid chlorine enters the coil in the vaporizer body through the liquid chlorine inlet and moves downward by gravity. When the liquid chlorine moves downward, it fully contacts and exchanges heat with the hot water in the vaporizer body, and the vaporized chlorine gas is collected in the chlorine gas collecting pipe and delivered to the target location through the chlorine gas pipeline; During the vaporization process, the hot water pipeline is kept open, hot water is introduced from the hot water chamber, and the exposed area at the bottom of the chlorine manifold is heated to realize the vaporization of the liquid chlorine at the bottom.

8. The method for full vaporization of liquid chlorine as claimed in claim 7, characterized in that: When the temperature at the bottom of the vaporizer body reaches 95°C, the interlock cuts off the steam line feed.

9. The method for full vaporization of liquid chlorine according to claim 8, characterized in that: When the vehicle is stopped or in an emergency, the liquid chlorine in the vaporizer body is sent back to the liquid chlorine storage tank through the sewage pipeline.

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