A chlorine gas vaporization energy-saving device

Abstract

The utility model discloses a chlorine gas vaporization energy-saving device, comprising a chlorine gas vaporization device and a chlorine gas buffer tank, wherein the chlorine gas vaporization device and the chlorine gas buffer tank are connected, the chlorine gas vaporization device is a parallel double-channel structure, the tube side of the chlorine gas vaporization device is connected to the liquid chlorine gasification pipeline, and the shell side of the chlorine gas vaporization device is connected to the hot water pipeline. The utility model has a simple and reliable structure, which not only fully recycles the sensible heat of steam condensed water, effectively reduces steam energy consumption, and greatly reduces the cost of steam use, but also realizes controllable temperature and pressure of chlorine gas vaporization, and solves the safety and environmental protection problem of nitrogen trichloride accumulation and emission in the chlorine gas vaporization process.

Description

Technical Field

[0001] This utility model relates to the field of liquid chlorine vaporization technology, specifically to an energy-saving device for chlorine vaporization. Background Technology

[0002] Liquid chlorine, also known as liquid chlorine, is a yellowish-green liquid with a boiling point of -34.6℃ and a melting point of -103℃. It vaporizes into a gas under normal pressure. Inhalation can cause severe poisoning. It has a strong irritant and corrosive effect. When mixed with other flammable gases in sunlight, it can burn and explode. Chlorine is a very reactive substance and can react with most elements (or compounds).

[0003] Because liquid chlorine directly participates in the chlorination reaction, not only is stable production difficult to control, but there are also significant safety hazards. Therefore, in situations where chlorine is used, liquid chlorine should generally be vaporized first before participating in the chlorination reaction. A liquid chlorine vaporizer converts liquid chlorine into gaseous chlorine. Common types include shell-and-tube vaporizers, tubular vaporizers, and coil vaporizers. According to the "Guiding Opinions on Chlorine Safety Facilities and Emergency Technologies" (

[2010] Xie Zi No. 070) issued by the China Chlor-Alkali Industry Association, the use of coil or shell-and-tube vaporizers for full vaporization of liquid chlorine is recommended. The liquid chlorine vaporization temperature should not be lower than 71℃, and the hot water control temperature should be 75-85℃. When using a special vaporizer (steam heating), the temperature should not exceed 121℃. The vaporization pressure is interlocked with the feed regulating valve, and the vaporization temperature is interlocked with the steam regulating valve.

[0004] Chinese Patent CN218883671U discloses a liquid chlorine vaporization system, including a heating tank, a hot water pump, a vaporizer, a liquid chlorine tank, and a liquid chlorine buffer tank. The output of the heating tank is connected to the input of the hot water pump via a pipeline, and the output of the hot water pump is connected to one of the inputs of the vaporizer via a pipeline. Water falling between two baffles forms a thin water curtain. The top of the heating tank is M-shaped, retaining water for further initial heating. After overflowing, the water falls onto both sides of the heating tank. Multiple heating plates are arranged in a stepped pattern, allowing the water to form a waterfall-like effect, thus absorbing heat effectively. The water falls to the bottom of the heating tank. The multiple heating tubes ensure continuous temperature and maintain a constant internal circulating water temperature. This liquid chlorine vaporization system can maintain a constant internal circulating water temperature. However, this system has several drawbacks, including a complex heating tank structure that is difficult to maintain, uncontrollable pressure after liquid chlorine vaporization, and the safety risks associated with the accumulation of nitrogen trichloride during the vaporization process.

[0005] Chinese Patent CN209762705U discloses a chlorine vaporization device, including a solution tank; a first vaporization unit comprising a first liquid separator, a first gas separator, and several vaporization tubes; and a second vaporization unit, the vertical position of which is lower than that of the first vaporization unit, comprising a second liquid separator, a second gas separator, and several vaporization tubes. This chlorine vaporization device can improve the vaporization effect of liquid chlorine, but it suffers from problems such as complex structure, high failure rate, inconvenient maintenance, uncontrollable temperature and pressure after liquid chlorine vaporization, and safety concerns regarding the accumulation of nitrogen trichloride during the vaporization process.

[0006] Chinese Patent CN219735001U discloses a pipeline-type chlorine vaporizer, including a base and a chlorine vaporization device. The chlorine vaporization device is welded to the upper end of the base. A high-temperature atomizing steam device is connected to the right side of the chlorine vaporization device, and a high-temperature steam generator is installed inside the high-temperature atomizing steam device. A steam outlet and a steam inlet are connected to the left side of the high-temperature atomizing steam device. Through high-temperature steam heating, chlorine can be vaporized to the maximum extent. A precise gas-liquid flow meter can achieve a very accurate mixing ratio and adjust the total flow rate. The gas-liquid flow control device can automatically adjust and detect whether the ratio of chlorine to liquid reactants is correct, improving the accuracy and efficiency of chlorination. Chlorine is a highly toxic gas. This chlorine liquefaction device is equipped with safety monitoring equipment. When the chlorine concentration exceeds the standard, the device's odor alarm will sound an alarm to alert workers and prevent danger caused by excessive concentration. The chlorine vaporization device uses high-temperature steam heating to vaporize chlorine to the maximum extent, but the device has problems such as high steam energy consumption, inability to control the temperature and pressure after liquid chlorine vaporization, and safety issues related to the accumulation of nitrogen trichloride during the liquid chlorine vaporization process.

[0007] Chinese Patent CN219639755U discloses a high-efficiency vaporization device for liquid chlorine vaporization, relating to the field of liquid chlorine vaporization technology. The device includes a conveying pipeline, one end of which is fixedly connected to a liquid chlorine storage tank. The conveying pipeline is fixedly mounted on a vaporizer mounting frame, and a vaporizer base is fixedly mounted on the base of the vaporizer mounting frame. The conveying pipelines are arranged in a ring around the vaporizer mounting frames, and an ice-breaking wall is movably connected to the outer wall of the conveying pipeline. This chlorine vaporization device uses mechanical ice breaking to improve the vaporization efficiency of the equipment. However, the device suffers from problems such as complex structure, high failure rate, significant wear on the vaporization pipeline, high energy consumption due to electric heating for liquid chlorine vaporization, uncontrollable temperature and pressure after liquid chlorine vaporization, and safety concerns regarding the accumulation of nitrogen trichloride during the vaporization process. Utility Model Content

[0008] The purpose of this invention is to provide a chlorine vaporization energy-saving device with a simple and reliable structure. It not only fully recovers and utilizes the sensible heat of steam condensate, effectively reducing steam energy consumption and greatly reducing steam usage costs, but also enables controllable temperature and pressure of chlorine vaporization, solving the safety and environmental protection problem of nitrogen trichloride accumulation and emission during chlorine vaporization.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A chlorine vaporization energy-saving device includes a chlorine vaporization device and a chlorine buffer tank. The chlorine vaporization device and the chlorine buffer tank are connected. The chlorine vaporization device has a parallel dual-channel structure. The tube side of the chlorine vaporization device is connected to the liquid chlorine vaporization pipeline, and the shell side of the chlorine vaporization device is connected to the hot water pipeline.

[0011] Furthermore, the tube side of the chlorine vaporization device includes a tube liquid chlorine channel and a tube liquid chlorine inlet and a tube chlorine outlet located at both ends of the tube liquid chlorine channel, and the shell side of the chlorine vaporization device includes a shell hot water channel and a shell hot water inlet and a shell hot water outlet located at both ends of the shell hot water channel.

[0012] Furthermore, the liquid chlorine inlet end of the tubular section is connected to the liquid chlorine outlet of the chlorine buffer tank at the bottom of the chlorine buffer tank, and the chlorine outlet end of the tubular section is connected to the chlorine inlet of the chlorine buffer tank on the side of the chlorine buffer tank.

[0013] Furthermore, the shell-side hot water inlet and the hot water tank are connected by a hot water tank outlet pipe. A ball valve is installed between the main water pipe of the hot water tank outlet pipe and the hot water tank. There are two branches between the hot water tank outlet pipe and the shell-side hot water inlet. Each branch is equipped with a ball valve, a filter, a ball valve, a hot water pump, and a ball valve in sequence. The shell-side hot water outlet is connected to the hot water tank inlet pipe. The filter contains a filter element with a mesh size of 20 to 150 mesh.

[0014] Furthermore, the liquid chlorine inlet of the chlorine buffer tank is connected in sequence to the outlet regulating valve and the liquid chlorine cylinder, and the chlorine outlet of the chlorine buffer tank is connected to the chlorine conveying pipeline, which is equipped with a thermometer.

[0015] Furthermore, the bottom of the chlorine buffer tank is equipped with a drain valve, a sampling valve, and a sampling port. The drain valve is installed on the chlorine absorption pipeline, and a chlorine absorption pool is set at the outlet of the chlorine absorption pipeline. A ball valve, a rupture disc, a pressure gauge, and a safety valve are installed sequentially on the pipeline at the top of the chlorine buffer tank and connected to the safety valve tail gas to the chlorine absorption pipeline. An independent pressure gauge is also installed at the top of the chlorine buffer tank.

[0016] Furthermore, the hot water tank has a steam inlet regulating valve on the pipe on its side, a steam condensate inlet pipe, a vent pipe, an overflow pipe and a thermometer on the top of the hot water tank, and a condensate outlet valve at the bottom of the hot water tank.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention not only achieves controllable temperature and pressure after chlorine vaporization, solving the safety and environmental protection problem of nitrogen trichloride accumulation and emission during chlorine vaporization, but also recovers and utilizes a large amount of sensible heat from steam condensate, effectively reducing steam energy consumption, significantly lowering steam usage costs, and ensuring the chlorine vaporization effect. It features simple and reliable equipment, convenient maintenance, safety, environmental friendliness, energy saving, and high efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the chlorine vaporization energy-saving device of this utility model;

[0020] Figure 2 This is a schematic diagram of the chlorine vaporization device of this utility model.

[0021] In the diagram: 1. Steam condensate inlet pipe; 2. Ball valve; 3. Hot water tank; 4. Vent pipe; 5. Thermometer; 6. Overflow pipe; 7. Steam inlet regulating valve; 8. Hot water tank outlet pipe; 9. Condensate outlet valve; 10. Filter; 11. Hot water pump; 12. Shell-side hot water inlet; 13. Chlorine vaporization device; 14. Tube-side liquid chlorine inlet; 15. Tube-side chlorine outlet; 16. Shell-side hot water outlet; 17. Inlet pipe to hot water tank; 18. Chlorine buffer tank; 19. Chlorine buffer tank 20. Liquid chlorine outlet; 21. Chlorine buffer tank chlorine inlet; 22. Chlorine buffer tank liquid chlorine inlet; 23. Chlorine buffer tank chlorine outlet; 24. Rupture disc; 25. Pressure gauge; 26. Safety valve; 27. Safety valve tail gas to chlorine absorption pipeline; 28. Chlorine transmission pipeline; 29. ​​Drain valve; 30. Sampling valve; 31. Sampling port; 32. Outlet regulating valve; 33. Liquid chlorine cylinder; 34. Chlorine absorption pipeline; 35. Chlorine absorption tank; 36. Pipe-side liquid chlorine channel; 37. Shell-side hot water channel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] See Figure 1A chlorine vaporization energy-saving device includes a chlorine vaporization device 13 and a chlorine buffer tank 18. The chlorine vaporization device 13 and the chlorine buffer tank 18 are connected. The chlorine vaporization device 13 has a parallel dual-channel structure. The tube side of the chlorine vaporization device 13 is connected to the liquid chlorine vaporization pipeline, and the shell side of the chlorine vaporization device 13 is connected to the hot water pipeline. The hot and cold fluids in the tube side and the shell side exchange heat in countercurrent. An insulation layer is provided on the outside of the shell side, which not only increases the heat exchange area of ​​liquid chlorine vaporization, but also reduces the heat loss of the hot water in the shell side, greatly improving the heat exchange efficiency of the chlorine vaporization device.

[0024] See Figure 2 The chlorine vaporization device 13 has a tube side including a tube side liquid chlorine channel 35 and a tube side liquid chlorine inlet 14 and a tube side chlorine outlet 15 located at both ends of the tube side liquid chlorine channel 35. The chlorine vaporization device 13 also has a shell side hot water channel 36 and a shell side hot water inlet 12 and a shell side hot water outlet 16 located at both ends of the shell side hot water channel 36. Liquid chlorine enters the tube side liquid chlorine inlet 14, passes through the curved tube side liquid chlorine channel 35, and exits through the tube side chlorine outlet 15. Hot water enters the shell side hot water inlet 12, passes through the curved tube side liquid chlorine channel 35, and exits through the tube side chlorine outlet 15. Hot water enters the shell side hot water inlet 12, passes through the curved tube side liquid chlorine channel 35, and exits through the curved tube side liquid chlorine channel 35. After the hot water channel 36 in the shell side, the hot water exits from the shell side outlet 16. The liquid chlorine inlet 14 in the tube side is connected to the liquid chlorine outlet 19 of the chlorine buffer tank at the bottom of the chlorine buffer tank 18. The chlorine outlet 15 in the tube side is connected to the chlorine inlet 20 of the chlorine buffer tank on the side of the chlorine buffer tank 18. Since the liquid chlorine in the tube side and the hot water in the shell side flow in opposite directions, a countercurrent heat exchange mode of hot and cold fluids is formed, which increases the heat exchange area of ​​liquid chlorine vaporization and reduces the heat loss of hot water in the shell side, greatly improving the heat exchange efficiency of the chlorine vaporization device.

[0025] The shell-side hot water inlet 12 and the hot water tank 3 are connected by the hot water tank outlet pipe 8. The hot water tank 3 has a steam heating function. A ball valve 2 is installed between the main water pipe of the hot water tank outlet pipe 8 and the hot water tank 3. There are two branches between the hot water tank outlet pipe 8 and the shell-side hot water inlet 12. Each branch is equipped with a ball valve 2, a filter 10, a ball valve 2, a hot water pump 11, and a ball valve 2 in sequence. The two branches are connected in parallel, so that one branch is in use while the other branch is on standby. This fully filters particulate impurities in the hot water, extends the life of the hot water pump, and ensures a stable and reliable hot water supply for the chlorine vaporization device. The filter 10 is equipped with a filter element with a mesh size of 20 to 150 mesh. The shell-side hot water outlet 16 is connected to the hot water tank inlet pipe 17.

[0026] The chlorine inlet 21 of the chlorine buffer tank 18 is connected in sequence to the outlet regulating valve 31 and the liquid chlorine cylinder 32. The chlorine outlet 22 of the chlorine buffer tank 18 is connected to the chlorine conveying pipeline 27. A thermometer 5 is installed on the chlorine conveying pipeline 27.

[0027] The bottom of the chlorine buffer tank 18 is equipped with a drain valve 28, a sampling valve 29, and a sampling port 30. The drain valve 28 is installed on the chlorine absorption pipeline 33. A chlorine absorption tank 34 is set at the outlet of the chlorine absorption pipeline 33. The tank is drained regularly, and the content of nitrogen trichloride is sampled and monitored to reduce the accumulation of nitrogen trichloride in the chlorine buffer tank 18. The drain valve 28 is connected to the chlorine absorption tank 34 to fully absorb the emitted pollutant nitrogen trichloride, thus solving the safety and environmental protection problems of nitrogen trichloride in the chlorine vaporization process.

[0028] A ball valve 2, a rupture disc 23, a pressure gauge 24, and a safety valve 25 are sequentially installed on the top of the chlorine buffer tank 18. The pipes are connected to the safety valve's exhaust gas to the chlorine absorption pipeline 26. An independent pressure gauge 24 is also installed on the top of the chlorine buffer tank 18. The top of the chlorine buffer tank 18 is connected to the ball valve 2, the rupture disc 23, the pressure gauge 24, the safety valve 25, and the safety valve's exhaust gas to the chlorine absorption pipeline 26 in sequence. An outlet regulating valve 31 is also installed to interlock with the pressure of the chlorine buffer tank 18. This not only solves the safety and environmental protection problem of overpressure relief of the chlorine buffer tank 18, but also effectively controls the pressure of the chlorine buffer tank 18 and the chlorine delivery pipeline 27.

[0029] The hot water tank 3 has a steam inlet regulating valve 7 on the side pipe. The top of the hot water tank 3 is equipped with a steam condensate inlet pipe 1, a vent pipe 4, an overflow pipe 6, and a thermometer 5. The steam condensate inlet pipe 1 is also equipped with a ball valve 2. The bottom of the hot water tank 3 is equipped with a condensate outlet valve 9. The steam inlet regulating valve 7 is interlocked with the thermometer 5, which not only ensures that the temperature after chlorine vaporization reaches the required level and guarantees the vaporization effect of chlorine, but also makes full use of the sensible heat of the recovered steam condensate, reducing the amount of steam used and greatly reducing the cost of steam use.

[0030] The working process of this utility model:

[0031] Liquid chlorine enters the chlorine buffer tank 18 from the outlet regulating valve 31 of the liquid chlorine cylinder 32 via the liquid chlorine inlet 21. It then enters the tubular liquid chlorine inlet 14 from the liquid chlorine outlet 19. In the chlorine vaporization device 13, the liquid chlorine is vaporized into chlorine gas after sufficient heat exchange with hot water. The chlorine then enters the chlorine inlet 20 of the chlorine buffer tank from the tubular chlorine outlet 15. After pressure stabilization in the chlorine buffer tank 18, the chlorine gas enters the chlorine delivery pipeline 27 from the chlorine outlet 22 to supply chlorine gas externally. The recovered steam condensate enters the hot water tank 3 via the steam condensate inlet pipe 1 and ball valve 2. The hot water then enters the hot water tank 3 via ball valve 2 and the hot water tank outlet pipe 8, sequentially passing through ball valve 2, filter 10, ball valve 2, hot water pump 11, and ball valve 2. The hot water is then pumped by the hot water pump 11 to the shell-side hot water inlet 12. After sufficient heat exchange with liquid chlorine, the hot water enters the hot water inlet pipe 17 of the hot water tank from the shell-side hot water outlet 16.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chlorine gas vaporization energy-saving device, comprising a chlorine gas vaporization device (13) and a chlorine gas buffer tank (18), characterized in that: The chlorine gas vaporization device (13) is connected to the chlorine gas buffer tank (18). The chlorine gas vaporization device (13) is a parallel double-channel structure. The tube side of the chlorine gas vaporization device (13) is connected to the liquid chlorine vaporization pipeline, and the shell side of the chlorine gas vaporization device (13) is connected to the hot water pipeline.

2. A chlorine gasification energy-saving device according to claim 1, characterized in that: The tube side of the chlorine gas vaporization device (13) comprises a tube side liquid chlorine channel (35) and a tube side liquid chlorine inlet end (14) and a tube side chlorine outlet end (15) located at both ends of the tube side liquid chlorine channel (35); the shell side of the chlorine gas vaporization device (13) comprises a shell side hot water channel (36) and a shell side hot water inlet end (12) and a shell side hot water outlet end (16) located at both ends of the shell side hot water channel (36).

3. A chlorine gasification energy-saving device according to claim 2, characterized in that: The tube-side liquid chlorine inlet (14) is connected to a chlorine buffer tank liquid chlorine outlet (19) at the bottom of the chlorine buffer tank (18), and the tube-side chlorine outlet (15) is connected to a chlorine buffer tank chlorine inlet (20) at the side of the chlorine buffer tank (18).

4. A chlorine gasification energy-saving device according to claim 2, characterized in that: The shell-side hot water inlet end (12) and the hot water tank (3) are connected via a hot water tank outlet pipe (8); a ball valve (2) is installed between the main water pipe of the hot water tank outlet pipe (8) and the hot water tank (3); two branches are provided between the hot water tank outlet pipe (8) and the shell-side hot water inlet end (12); each branch is provided with a ball valve (2), a filter (10), a ball valve (2), a hot water pump (11) and a ball valve (2) in sequence; the shell-side hot water outlet end (16) is connected to a hot water tank inlet pipe (17); a filter element is installed in the filter (10); and the mesh number of the filter element is 20 to 150.

5. A chlorine gasification energy-saving device according to claim 1, characterized in that: The chlorine buffer tank liquid chlorine inlet (21) of the chlorine buffer tank (18) is connected to the outlet regulating valve (31) and the liquid chlorine cylinder (32) in sequence, and the chlorine buffer tank chlorine outlet (22) of the chlorine buffer tank (18) is connected to the chlorine delivery pipeline (27), and the chlorine delivery pipeline (27) is provided with a thermometer (5).

6. A chlorine gasification energy-saving device according to claim 1, characterized in that: The bottom of the chlorine buffer tank (18) is provided with a drain valve (28), a sampling valve (29) and a sampling port (30); the drain valve (28) is installed on a chlorine absorption pipeline (33); a chlorine absorption tank (34) is arranged at the outlet of the chlorine absorption pipeline (33); a ball valve (2), a bursting disc (23), a pressure gauge (24) and a safety valve (25) are installed upward in sequence on the pipeline at the top of the chlorine buffer tank (18) and connected to the safety valve tail gas dechlorination absorption pipeline (26); an independent pressure gauge (24) is also arranged on the top of the chlorine buffer tank (18).

7. A chlorine gasification energy-saving device according to claim 4, characterized in that: A steam inlet regulating valve (7) is provided on the side pipe of the hot water tank (3), a steam condensate water inlet pipe (1), a vent pipe (4), an overflow pipe (6) and a thermometer (5) are provided on the top of the hot water tank (3), and a condensate water outlet valve (9) is provided on the bottom of the hot water tank (3).

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