Cyanogen chloride gas purification apparatus

Abstract

The utility model provides a cyanogen chloride gas purification device belongs to gas purification technical field, including casing, cyanogen chloride gas feeder, gas distributor and baffle cylinder group. The casing top has tail gas export, and the bottom has the discharge gate, the casing is the jacket structure from oneself, constitutes the secondary condensation of cyanogen chloride gas. The cyanogen chloride gas feeder includes the cyanogen chloride feeding pipe of inserting into the casing. The gas distributor sets up in the casing, is used for purging low temperature inert gas to the casing, constitutes the primary cooling of cyanogen chloride gas, and the gas distributor includes distribution cylinder and distribution air pipe, and the lower end of distribution cylinder is blocked, and the upper end is open. Distribution cylinder is provided with distribution hole. The baffle cylinder group sets up in the casing, and is concentrically nested with distribution cylinder, constitutes the baffle channel, and the tail gas export is located the outside of baffle channel. The application can improve the purification efficiency and purification quality of cyanogen chloride gas through primary cooling and secondary cooling.

Description

Technical Field

[0001] This utility model belongs to the field of gas purification technology, specifically relating to a cyanide gas purification device. Background Technology

[0002] Cyanide is an important chemical raw material for the synthesis of cyanuric chloride, sodium dicyandiamide, and azacyanamide, and its quality affects the quality of downstream products. Therefore, the purification of cyanide is essential. However, because cyanide is highly irritating and chemically reactive, it can react with many substances and decomposes when heated, releasing highly toxic and corrosive fumes. Therefore, the purification process of cyanide monomer requires strict control.

[0003] Currently, fine chemical companies mainly use distillation processes, which have low purification efficiency and are complex to operate. In addition, during the distillation process, residual chlorine may occur due to gas-liquid balance limitations, affecting the purification effect of cyanogen chloride. Furthermore, cyanogen chloride and chlorine are highly corrosive, especially under high temperature and humid conditions, which will accelerate the corrosion of equipment, placing extremely high demands on equipment materials. Utility Model Content

[0004] This utility model provides a cyanide gas purification device, which aims to solve the problems of low efficiency in the preparation of high-purity cyanide gas, poor purification effect, complex operation and high equipment requirements.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a cyanide gas purification device, comprising: a shell, a cyanide gas feeder, a gas distributor, and a baffle assembly; The shell has an exhaust gas outlet at the top and a discharge port at the bottom; the shell is a jacketed structure with a cooling medium inlet and a cooling medium outlet, forming a two-stage cooling system for cyanide gas; A cyanide gas feeder, including a cyanide gas feed pipe extending into the housing; A gas distributor, disposed within the housing, is used to purge low-temperature inert gas into the housing, constituting primary cooling of cyanide gas; the gas distributor includes a distribution cylinder and a distribution inlet pipe, the lower end of the distribution cylinder being sealed and the upper end being open; the distribution cylinder is provided with distribution holes; the distribution inlet pipe is connected to the hollow cavity inside the distribution cylinder; A baffle assembly is disposed inside the housing; the upper end of the baffle assembly is connected to the top of the housing, forming a closed end, and its lower end is an open opening; the baffle assembly and the distribution cylinder are nested concentrically, one above the other, to form a baffle channel; the exhaust gas outlet is located outside the baffle channel. The discharge port of the cyanogen chloride feed pipe is located on the center line of the baffle assembly and the distribution cylinder. The cyanogen chloride gas entering the center of the shell is cooled down by the first stage of the baffle channel and then cooled by the cooling medium in the shell. The uncondensed chlorine gas is discharged through the tail gas outlet, and the condensed cyanogen chloride is discharged through the discharge port at the bottom of the shell, thereby purifying the cyanogen chloride gas.

[0006] In one possible implementation, the baffle assembly includes an inner baffle and an outer baffle that are concentrically fitted together, with the distribution cylinder located between the inner baffle and the outer baffle, and the distribution cylinder circumferentially overlapping the inner baffle and the outer baffle.

[0007] In one possible implementation, the distribution cylinder includes a distribution straight cylinder and a distribution cone connected to the lower end of the distribution straight cylinder, the distribution straight cylinder being concentrically fitted with the baffle assembly; the distribution air inlet pipe is connected to the distribution cone; the distribution holes are provided on the inner and outer walls of the distribution straight cylinder to achieve stepped cooling.

[0008] In one possible implementation, the upper end of the distribution cylinder is 800-1000 mm away from the top inner surface of the housing; the lower end of the baffle assembly is flush with the lower end of the distribution cylinder.

[0009] In one possible implementation, the distribution holes on the inner wall of the distribution cylinder are inclined downwards, and the distribution holes on the outer wall of the distribution cylinder are inclined upwards.

[0010] In one possible implementation, three distribution air inlets are evenly arranged circumferentially on the distribution cone, and the distribution air inlets are connected to the distribution cone in an upwardly inclined manner.

[0011] In one possible implementation, the lower end of the distribution cone is provided with an auxiliary outlet.

[0012] In one possible implementation, an umbrella-shaped adjuster is provided on the port of the chlorocyanide feed pipe that extends into the center of the housing. The umbrella-shaped adjuster includes an umbrella-shaped baffle and a spring. The spring connects the umbrella-shaped baffle to the port of the chlorocyanide feed pipe. The umbrella-shaped baffle is pulled away from the chlorocyanide feed pipe by the gas impact force inside the chlorocyanide feed pipe, and when the gas impact force disappears, it moves closer to the chlorocyanide feed pipe by the spring's reset and the weight of the umbrella-shaped baffle.

[0013] In one possible implementation, the chlorocyanide feed pipe is provided with a chlorocyanide inlet and an inert gas inlet arranged side by side.

[0014] In one possible embodiment, the housing includes a cylindrical shell, a conical shell connected to the lower end of the cylindrical shell, and a top cover enclosing the upper end of the cylindrical shell; the conical shell, the cylindrical shell, and the top cover are all jacketed structures with cavities, the cavity of the cylindrical shell communicates with the cavity of the conical shell, the conical shell is provided with a first cooling medium inlet, the cylindrical shell is provided with a first cooling medium outlet, and the top cover is provided with a second cooling medium inlet and a second cooling medium outlet.

[0015] The cyanide gas purification device provided by this utility model has the following advantages compared with the prior art: the baffle assembly and the distribution cylinder are nested concentrically, one above the other, forming a baffle channel, with the tail gas outlet located on the outside of the baffle channel and the cyanide gas discharge port located on the center line of the distribution cylinder; the cyanide gas is directly fed into the center of the distribution cylinder and the baffle assembly through the cyanide gas feed pipe, while the tail gas outlet is located on the outside of the baffle channel. The cyanide gas needs to pass through the baffle channel formed by the baffle assembly and the distribution cylinder. When passing through the baffle purification channel, the low-temperature inert gas that enters the hollow cavity of the distribution cylinder through the distribution inlet pipe is continuously discharged from the distribution hole, providing primary cooling for the passing cyanide gas. This baffle purification... The S-shaped pure channel greatly increases the contact time and contact area between cyanogen chloride gas and the low-temperature inert gas. This thorough contact effectively improves the cooling efficiency and uniformity of the cyanogen chloride gas. After primary cooling by the low-temperature inert gas, the cyanogen chloride gas exits through the baffle channel and undergoes secondary cooling under the action of the cooling medium within the shell jacket. It then rapidly condenses into solid cyanogen chloride and exits under gravity from the outlet at the bottom of the shell. Uncondensed chlorine gas exits through the gap between the baffle channel and the shell from the tail gas outlet, thus achieving the separation of chlorine from the cyanogen chloride gas and purifying the cyanogen chloride gas.

[0016] This method of purifying cyanide gas involves introducing cyanide gas into the shell through a cyanide gas feed pipe. After primary cooling through a baffle channel and secondary cooling through a cooling medium inside the shell, chlorine and cyanide gas can be separated. The operation is simple, and continuous purification can be achieved by continuously introducing cyanide gas, which greatly improves the purification efficiency and purity of cyanide gas. With this separation method, chlorine gas can be directly discharged from the tail gas outlet, avoiding chlorine residue in the shell. This solves the problems of low efficiency in cyanide gas preparation, poor purification effect, and complex operation.

[0017] Meanwhile, since the cyanide gas is directly fed into the center of the shell, and due to the shielding of the distribution cylinder and baffle assembly, the cyanide gas first comes into contact with the distribution cylinder or baffle assembly inside the shell and is initially cooled. When the cyanide gas comes into contact with the inner wall of the shell, it has already been cooled down, and the coolant circulating inside the shell also provides a low-temperature environment for the cyanide gas. Therefore, the low-temperature environment inside the shell greatly reduces the corrosion of the equipment by cyanide and chlorine, thereby reducing the manufacturing cost of the equipment and extending its service life.

[0018] Since the initially added cyanogen chloride gas does not directly contact the shell, the components that are first or fastest corroded by the highly corrosive cyanogen chloride and chlorine gas are the distribution cylinder or baffle assembly. Compared to the shell, these two components are easier to disassemble and replace, and can be used as wear parts. Compared to corroding the shell, this also greatly reduces maintenance and manufacturing costs.

[0019] Therefore, using this device to purify cyanide gas can improve the purification efficiency and quality of cyanide gas, reduce operational complexity, reduce the requirements for equipment and materials, and solve the problems of low efficiency in the preparation of high-purity cyanide gas, poor purification effect, complex operation, and high equipment requirements. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of the cyanide gas purification device provided in this embodiment of the utility model; Figure 2 A schematic diagram of the gas flow path of cyanide chloride provided in an embodiment of this utility model; Figure 3 for Figure 1 A top view schematic diagram of the provided cyanide gas purification device; Figure 4 For along Figure 1 Cross-sectional view of line AA in the middle; Figure 5 A schematic diagram of the structure for the flow of low-temperature inert gas discharged from the distributor in an embodiment of this utility model; Figure 6 A schematic diagram of the inclined state of the distribution holes on the distributor provided in an embodiment of this utility model; Figure 7 A schematic diagram of the staggered distribution of distribution holes on the distributor provided in an embodiment of this utility model; Figure 8 A schematic diagram of the distribution holes on the distributor provided in an embodiment of this utility model, showing the distribution holes facing each other vertically; Figure 9 A schematic diagram of the structure of the umbrella-shaped regulator on the chlorocyanide feed pipe provided in this embodiment of the utility model; Explanation of reference numerals in the attached figures: 1. Top cover; 11. Upper jacket; 12. Second cooling medium inlet; 13. Second cooling medium outlet; 14. Exhaust gas outlet; 2. Shell; 21. Lower jacket; 22. First cooling medium inlet; 23. First cooling medium outlet; 24. Discharge port; 3. Chlorocyanide feed pipe; 31. Chlorocyanide feed port; 32. Inert gas feed port; 33. Umbrella regulator; 331. Umbrella baffle; 332. Spring; 4. Distributor; 41. Distributor inlet pipe; 42. Distributor cone; 43. Distributor straight cylinder; 44. Distributor hole; 45. Auxiliary outlet; 5. Reactor clamp; 6. Sealing gasket; 7. Inner baffle; 8. Outer baffle. Detailed Implementation

[0021] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Please see Figures 1 to 9 The present invention provides a cyanide gas purification device. The cyanide gas purification device includes a shell, a cyanide gas feeder, a gas distributor, and a baffle assembly.

[0023] Combination Figure 1 As shown, the interior of the shell 2 is a material cavity for containing materials. The top has a tail gas outlet 14 connected to the material cavity, and the bottom has a discharge port 24 connected to the material cavity. The shell 2 itself is a jacket structure. The jacket of the shell 2 can contain coolant or cooling gas. The coolant enters the jacket from the cooling medium inlet and exchanges heat with the cyanide gas in the shell 2 to achieve condensation of the cyanide gas. Then it is discharged from the cooling medium outlet and, after heat exchange through an externally connected heat exchanger, it re-enters the jacket for cooling, thus constituting a two-stage cooling of the cyanide gas.

[0024] The cyanide gas feeder includes a cyanide gas feed pipe 3 that extends into the housing 2; the cyanide gas to be purified enters the housing 2 through the cyanide gas feed pipe 3.

[0025] See Figure 1As shown, the gas distributor 4 is disposed inside the housing 2 and is used to purge low-temperature inert gas into the housing 2, constituting the primary cooling of cyanogen chloride gas. The gas distributor 4 includes a distribution cylinder and a distribution inlet pipe 41. The lower end of the distribution cylinder is sealed and the upper end is open. A distribution hole 44 is provided on the distribution cylinder. The distribution inlet pipe 41 is connected to the hollow cavity inside the distribution cylinder. The low-temperature inert gas entering the hollow cavity of the distribution cylinder through the distribution inlet pipe 41 is discharged through the distribution hole 44 to purge the cyanogen chloride gas, thus performing primary cooling of the cyanogen chloride gas and providing a preliminary guarantee for the cyanogen chloride gas to flow to the low-temperature area near the inner wall of the housing 2 for liquefaction and condensation.

[0026] See Figure 1 The baffle assembly is installed inside the shell 2; the upper end of the baffle assembly is connected to the top of the shell 2, forming a closed end, and its lower end is an open opening; the baffle assembly and the distribution cylinder are nested concentrically, one above the other, to form a baffle channel; the exhaust outlet 14 is located outside the baffle channel; the baffle assembly and the distribution cylinder are cross-fitted to form an S-shaped baffle channel, which prolongs the residence time of cyanogen chloride gas in the shell 2, achieves sufficient cooling of cyanogen chloride gas, and provides structural protection for the purification efficiency and quality of cyanogen chloride gas.

[0027] Optionally, the distribution cylinder can be located inside the baffle assembly or mounted on the outside of the baffle assembly.

[0028] See Figure 1 As shown, the discharge port of the cyanogen chloride feed pipe 3 is located on the center line of the baffle group and the distribution cylinder. After the cyanogen chloride gas entering the center of the shell 2 is cooled by the primary cooling of the baffle channel, it is cooled by the coolant in the shell 2. The uncondensed chlorine gas is discharged through the tail gas outlet 14, and the condensed cyanogen chloride is discharged through the discharge port 24 at the bottom of the shell 2, thus realizing the purification of cyanogen chloride gas.

[0029] The cyanide gas purification device provided by this utility model has the following advantages compared with the prior art: (1) High-quality cyanogen chloride is obtained by primary and secondary cooling of cyanogen chloride gas, which can meet the production needs of downstream high-quality products and solve the problems of low purification efficiency, poor purification quality and complicated operation of cyanogen chloride: The baffle assembly and the distribution cylinder are nested concentrically, one above the other, forming a baffle channel. The tail gas outlet 14 is located on the outside of the baffle channel, and the cyanide gas discharge port is on the center line of the distribution cylinder. The cyanide gas is directly fed into the center of the distribution cylinder and the baffle assembly through the cyanide feed pipe 3, while the tail gas outlet 14 is located on the outside of the baffle channel. The cyanide gas needs to pass through the baffle channel formed by the baffle assembly and the distribution cylinder. When passing through the baffle purification channel, the low-temperature inert gas that enters the hollow cavity of the distribution cylinder through the distribution inlet pipe 41 is continuously discharged from the distribution hole 44, providing primary cooling for the passing cyanide gas. This baffle purification channel is S-shaped, which greatly increases the cyanide gas purification efficiency. The contact time between cyanide gas and low-temperature inert gas, as well as the contact area between cyanide gas and low-temperature inert gas, effectively improve the cooling efficiency and uniformity of cyanide gas by ensuring sufficient contact between them. After the cyanide gas undergoes primary cooling by the low-temperature inert gas and exits from the baffle channel, it undergoes secondary cooling under the action of the coolant in the jacket of shell 2, resulting in rapid condensation. The condensed cyanide gas is discharged through the outlet 24 at the bottom of shell 2, while the uncondensed chlorine gas is discharged through the gap between the baffle channel and shell 2 from the tail gas outlet 14. This achieves the separation of chlorine gas from cyanide gas and the purification of cyanide gas.

[0030] In this method of purifying cyanogen chloride gas, the gas is introduced into the shell 2 through the cyanogen chloride feed pipe 3. After initial cooling through the baffle channel and secondary cooling of the shell 2, chlorine and cyanogen chloride gas can be separated. The operation is simple, and continuous purification can be achieved by continuously introducing cyanogen chloride gas, which greatly improves the purification efficiency and purity of cyanogen chloride. With this separation method, chlorine gas can be directly discharged from the tail gas outlet 14, which also avoids the residue of chlorine gas in the shell 2. This solves the problems of low efficiency in cyanogen chloride gas preparation, poor purification effect and complicated operation.

[0031] (2) It solves the problem of high requirements for equipment materials in high-temperature environments: Meanwhile, since the cyanide gas is directly fed into the center of the shell 2, and due to the shielding of the distribution cylinder and the baffle assembly, the cyanide gas first comes into contact with the distribution cylinder or the baffle assembly inside the shell 2 and is initially cooled. In addition, the coolant circulating inside the shell 2 also provides a low-temperature environment for the cyanide gas. Therefore, the low-temperature environment inside the shell 2 greatly reduces the corrosion of the equipment by cyanide and chlorine, thereby reducing the manufacturing cost of the equipment and extending its service life.

[0032] Since the initially added cyanogen chloride gas does not directly contact the shell 2, the components that are first or fastest corroded by the highly corrosive cyanogen chloride and chlorine gas are the distribution cylinder or baffle assembly. Compared to the shell 2, these two components are easier to disassemble and replace, and can be used as vulnerable parts. Compared to corroding the shell 2, this also greatly reduces maintenance and manufacturing costs.

[0033] For example, the materials for the distribution cylinder and the baffle assembly are selected to be highly corrosion-resistant, while the shell 2 can be selected to be a material with low corrosion resistance. High corrosion-resistant materials are expensive. By using different materials for different components, the manufacturing cost of the equipment can be reduced.

[0034] Therefore, using this device to purify cyanide gas can improve the purification efficiency and quality of cyanide gas, reduce operational complexity, reduce the requirements for equipment and materials, and solve the problems of low efficiency in the preparation of high-purity cyanide gas, poor purification effect, complex operation, and high equipment requirements.

[0035] (3) At the same time, in order to increase the exhaust gas emission rate and avoid the accumulation of uncondensed exhaust gas in the shell 2, two to six exhaust gas outlets 14 are uniformly arranged in the circumferential direction at the top of the shell 2. Since the exhaust gas contains corrosive chlorine gas and inert gas as a low-temperature cooling medium, by setting multiple exhaust gas outlets 14, it is possible to prevent the inert gas mixed with chlorine gas from staying in the shell 2, so that the exhaust gas can be discharged quickly, and the corrosion of the shell 2 by chlorine gas can also be reduced or avoided.

[0036] In some embodiments, see Figure 1 , Figure 2 and Figure 4 The baffle assembly includes an inner baffle 7 and an outer baffle 8 that are concentrically fitted together. The distribution cylinder is located between the inner baffle 7 and the outer baffle 8, and the distribution cylinder overlaps with the inner baffle 7 and the outer baffle 8 in the circumferential direction.

[0037] Combination Figure 2 The arrows in the diagram illustrate the purification process of cyanogen chloride gas as follows: The arrows indicate the flow path of the cyanogen chloride gas and the path of separation and discharge of cyanogen chloride and chlorine gas: The cyanogen chloride gas entering the inner baffle 7 flows downward under the guidance of the inner baffle 7, then turns back downward and enters the space between the inner baffle 7 and the distribution cylinder. The low-temperature inert gas in the cavity of the distribution cylinder is discharged from the distribution hole 44 and blown towards the flowing cyanogen chloride gas, gradually cooling it down; The cyanogen chloride gas continues to flow upward, bypassing the upper end of the distribution cylinder, and then turns downward to the space between the distribution cylinder and the outer baffle 7. Between the baffles 8, the low-temperature inert gas discharged from the distribution holes 44 on the outer wall of the distribution cylinder continues to cool the cyanogen chloride gas, achieving primary cooling of the cyanogen chloride gas in stages; driven by the airflow, the cyanogen chloride gas continues to flow downwards, and due to the cooling of the environment around the inner wall of the shell 2 by the coolant in the jacket, the cyanogen chloride is cooled in a secondary manner, and the condensed cyanogen chloride is discharged from the discharge port 24 at the lower end of the shell 2, while the uncondensed chlorine gas is discharged upwards from the tail gas outlet 14, realizing the separation of chlorine gas and cyanogen chloride, thereby achieving the purification of cyanogen chloride.

[0038] By setting up two baffles to surround the distribution cylinder, the time for low-temperature cooling of cyanogen chloride gas is increased within the limited space inside the shell 2. This allows the cyanogen chloride gas to undergo primary and secondary cooling within the shell 2, thereby improving the purification efficiency and quality of the cyanogen chloride gas and meeting the production needs of high-quality downstream products.

[0039] In some embodiments, see Figure 1 As shown, the distribution cylinder includes a distribution straight cylinder 43 and a distribution cone 42 connected to the lower end of the distribution straight cylinder 43. The distribution straight cylinder 43 and the baffle assembly are concentrically mounted. The distribution inlet pipe 41 is connected to the distribution cone 42. The distribution holes 44 are provided on the inner and outer walls of the distribution straight cylinder 43 to achieve internal and external purging, which constitutes the stepped cooling of the cyanide gas. That is, the primary cooling of the cyanide gas is a stepped cooling that gradually decreases in temperature when passing through the baffle channel.

[0040] The distribution cone 42 at the lower end of the distribution cylinder forms a seal and narrowing of the distribution cylinder 43, which provides space for the airflow to change direction at the lower end of the baffle assembly, while also preventing the airflow from escaping at this point.

[0041] Specifically, the distribution cylinder 43 is fitted between the inner baffle cylinder 7 and the outer baffle cylinder 8. Distribution holes 44 are evenly provided on the inner and outer walls of the distribution cylinder, which can realize internal and external purging, so that the flowing cyanide gas is continuously cooled by fresh low-temperature inert gas, thereby realizing the gradual and effective cooling of cyanide gas in stages as it flows along the baffle channel after entering it.

[0042] Regarding the shapes of the shell 2, the distribution cylinder 43, and the inner and outer baffles 7 and 8, when the shell 2 is cylindrical, the distribution cylinder 43, the inner baffle 7, and the outer baffle 8 are also preferably cylindrical; when the shell 2 is polygonal, the distribution cylinder 43, the inner baffle 7, and the outer baffle 8 are also preferably polygonal. This design ensures that the cyanide gas receives a consistent cooling environment throughout the shell 2, achieving thorough purification and high quality.

[0043] For example, the inner baffle 7 is a cylinder with a radius of 250 mm, the distribution straight cylinder 43 is a cylinder with a radius of 500 mm, the outer baffle 8 is a cylinder with a radius of 750 mm, and the diameter of the chlorocyanide feed pipe 3 is 50 mm.

[0044] The spacing between the distribution straight cylinder 43, the inner baffle cylinder 7, and the outer baffle cylinder 8, i.e. the width of the baffle channel, is not limited.

[0045] In some embodiments, see Figure 1As shown, the distance between the upper end of the distribution cylinder 43 and the top inner surface of the shell 2 is 800-1000 mm; the lower end of the baffle assembly is flush with the lower end of the distribution cylinder 43. The reserved distance between the distribution cylinder 43 and the top of the shell 2 constitutes the reversing structure of the baffle channel, so that after the cyanide gas flows through the upper end of the distribution cylinder 43, its flow direction is changed due to the obstruction of the top of the shell 2.

[0046] Optionally, the inner baffle 7 and the outer baffle 8 are 2000 mm long along the axis of the shell 2. The inner baffle 7 is inside the distribution straight cylinder 43 and its lower end is inside the distribution cone 42. The inner baffle 7 and the distribution cone 42 form a reversing gap for the cyanide gas. When the cyanide gas flows downward through the lower end of the inner baffle 7, it is reversed due to the obstruction of the distribution cone 42 and flows upward.

[0047] In some embodiments, see Figure 5 and Figure 6 As shown, the distribution holes 44 on the inner wall of the distribution cylinder 43 are inclined downwards, while the distribution holes 44 on the outer wall of the distribution cylinder 43 are inclined upwards. The design of the inclination angle of the distribution holes 44 allows the flow direction of the cyanide gas flowing through them to be opposite to the flow direction of the low-temperature inert gas exiting from the distribution holes 44, thus causing them to meet at an angle. This achieves purging and cooling of the cyanide gas while simultaneously slowing down its flow rate, thereby increasing the cooling residence time of the cyanide gas within the baffle channel and improving the uniformity of the cyanide gas cooling.

[0048] The angle of inclination of the distribution hole 44 is unlimited, such as 45°, 35°, 65°, etc., and the range of inclination angle is between 35° and 70°.

[0049] The shape of the distribution holes 44 can be circular, elliptical, square, or other polygonal. Examples of the distribution of the distribution holes 44 are as follows: Example 1: They can be evenly distributed in a circle along the circumference of the distribution cylinder 43, and multiple circles of distribution holes 44 can be evenly distributed at intervals along the axis of the distribution cylinder 43. That is, in the axial direction of the distribution cylinder 43, adjacent circles of distribution holes 44 are vertically aligned (see...). Figure 8 Example 2: A ring of distribution holes 44 is still evenly distributed along the circumference of the distribution cylinder 43, and adjacent rings of distribution holes 44 are staggered along the axis of the distribution cylinder 43 (see...). Figure 7 ).

[0050] In some embodiments, see Figure 1 and Figure 2Three distribution inlet pipes 41 (the third distribution inlet pipe 41 is not shown in the figure) are evenly arranged circumferentially on the distribution cone 42. The distribution inlet pipes 41 are connected to the distribution cone 42 at an upward inclination. The gas distributor 4 has three distribution inlet pipes 41, which can greatly prevent uneven gas distribution or excessively high local concentration that is easily caused by single-inlet gas intake. This design can improve the purification quality of cyanide gas.

[0051] The three distribution air inlet pipes 41 of the distributor 4 not only allow the low-temperature inert gas to enter, but also form a triangular support for the distributor 4 as a whole, supporting the distributor 4 on the housing 2 through the distribution air inlet pipes 41.

[0052] The structural feature of the distributor 4 in this application is that an auxiliary outlet 45 is provided at the lower end of the distribution cone 42. Since the cyanide gas directly enters the center of the shell 2, at the center of the distributor 4, and is blocked by the lower end of the distributor 4, it may condense after being cooled by the low-temperature inert gas in the baffle channel. The condensed cyanide gas accumulates at the bottom of the distribution cone 42 and cannot be discharged. The auxiliary outlet 45 at the lower end of the distribution cone 42 allows the liquid condensed at the bottom of the distribution cone 42 to be discharged to the bottom of the shell 2, and finally discharged from the discharge port 24 at the bottom of the shell 2.

[0053] In some embodiments, see Figure 1 , Figure 2 and Figure 9 An umbrella-shaped regulator 33 is provided at one end of the chlorocyanide feed pipe 3 that extends into the center of the housing 2 to adjust the opening of the feed. The umbrella-shaped regulator 33 includes an umbrella-shaped baffle 331 and a spring 332. The spring 332 connects the umbrella-shaped baffle 331 to the discharge port of the chlorocyanide feed pipe 3. The umbrella-shaped baffle 331 is pulled away from the discharge port by the gas impact force in the chlorocyanide feed pipe 3, and when the gas impact force disappears, it moves closer to the discharge port by the reset of the spring 332 and the gravity of the umbrella-shaped baffle 331.

[0054] The umbrella-shaped baffle 331 is connected to the cyanochlorocyanide feed pipe 3 via a spring 332. In a static state, the spring 332 provides a vertically upward supporting force to the umbrella-shaped baffle 331. When gas enters the housing 2 through the cyanochlorocyanide feed pipe 3, the gas pressure causes the umbrella-shaped baffle 331 to move upward, creating a gap between the baffle 331 and the cyanochlorocyanide feed pipe 3. Gas then enters the housing 2 through this gap, thus achieving feeding. After feeding is complete, the gas pressure becomes zero. Under the influence of gravity and the restoring force of the spring 332, the umbrella-shaped baffle 331 falls back to the top opening of the cyanochlorocyanide feed pipe 3, sealing it. This structure guides the gas to disperse in all directions while preventing some condensed cyanochlorocyanide from falling back into the cyanochlorocyanide feed pipe 3 and clogging the pipe.

[0055] The umbrella-shaped baffle 331 is used to guide the flow of cyanogen chloride falling onto it, thus preventing the accumulation of cyanogen chloride on it.

[0056] Specifically, the vertical distance from the apex to the lower edge of the umbrella-shaped baffle 331 is 50mm, and the tilt angle of the umbrella-shaped baffle 331 is 60°.

[0057] In some embodiments, see Figure 1 As shown, the cyanogen chlorocyanide feed pipe 3 is provided with a cyanogen chlorocyanide inlet 31 and an inert gas inlet 32 ​​arranged in parallel. The inert gas at room temperature enters the shell 2 through the inert gas inlet 32, which can realize gas replacement and purge the residual gas in the cyanogen chlorocyanide feed pipe 3 after the cyanogen chlorocyanide feed is completed.

[0058] The purification process based on the above embodiment is as follows: Ambient temperature inert gas enters the shell 2 through the inert gas inlet 32 ​​to replace the air. After replacement, a cooling medium is introduced into the jacket of the shell 2 to maintain a low-temperature environment. Once the temperature stabilizes, low-temperature inert gas and cyanogen chloride gas are sequentially introduced through the distributor 4 and the cyanogen chloride inlet 31, respectively. In the low-temperature environment of the shell 2, the low-temperature inert gas purges the cyanogen chloride flowing from the center of the shell 2 outwards through the distributor 4, causing it to condense rapidly. The uncondensed tail gas (including chlorine and inert gas) is discharged through the tail gas outlet 14 and enters the alkali tank for secondary treatment, absorbing the chlorine inside. The inert gas, after being washed with alkali, is recovered and reused. The resulting high-quality cyanogen chloride liquid is finally discharged through the bottom outlet 24.

[0059] The diameters of the chlorocyanide inlet 31, the inert gas inlet 32, and the chlorocyanide feed pipe 3 are all 50 mm.

[0060] In some embodiments, see Figure 1 As shown, the housing 2 includes a straight cylindrical shell, a conical shell connected to the lower end of the straight cylindrical shell, and a top cover 1 closed at the upper end of the straight cylindrical shell; the conical shell, the straight cylindrical shell, and the top cover 1 are all jacketed structures with cavities, the cavity of the straight cylindrical shell is connected to the cavity of the conical shell, the conical shell is provided with a first cooling medium inlet 22, the straight cylindrical shell is provided with a first cooling medium outlet 23; the top cover 1 is provided with a second cooling medium inlet 12 and a second cooling medium outlet 13.

[0061] The bottom of the shell 2 is a conical shell, which can guide and collect the condensed cyanide liquid through the gradually narrowing opening of the conical shell, so that it flows into the outlet 24.

[0062] The first cooling medium inlet 22 and the second cooling medium inlet 12 constitute the cooling medium inlet, and the first cooling medium outlet 23 and the second cooling medium outlet 13 constitute the cooling medium outlet.

[0063] Specifically, the jacket structure of the shell 2 is defined as the lower jacket 21, and the corresponding jacket structure of the top cover 1 is defined as the upper jacket 11.

[0064] In this embodiment, the top cover 1 of the shell 2 also adopts a jacket structure and is injected with coolant. Therefore, the entire shell 2 is cooled down by the coolant. The cooling effect is the same in all parts of the shell 2, which is also conducive to improving the purification quality and purification efficiency of cyanogen chloride.

[0065] Among them, see Figures 1 to 3 As shown, the top cover 1 is fastened to the shell 2 using a reactor clamp 5, and a sealing gasket 6 is provided between the top cover 1 and the shell 2 to prevent gas inside the shell 2 from escaping through the gap between them. The reactor clamp 5 can be purchased on Taobao or JD.com.

[0066] In other examples, the top cover 1 has one point of rotatable connection to the housing 2 via a hinge or pivot, and another point on the opposite side has a latch installed between the top cover 1 and the housing 2. After the top cover 1 is placed on the housing 2, it is fastened to the housing 2 by the latch. Two or three latches are evenly distributed around the top cover 1 along its circumference, and are fastened to the housing 2 by the latches. The top cover 1 can also be directly installed on the housing 2 by bolts.

[0067] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A chlorinated cyan gas purification apparatus characterized by comprising: include: The shell (2) has a tail gas outlet (14) at the top and a discharge port (24) at the bottom; the shell (2) is a jacket structure with a cooling medium inlet and a cooling medium outlet, forming a two-stage cooling of cyanide gas; A cyanide gas feeder includes a cyanide feed pipe (3) extending into the housing (2); A gas distributor (4) is disposed inside the housing (2) and is used to purge low-temperature inert gas into the housing (2) to form primary cooling of cyanide gas; the gas distributor (4) includes a distribution cylinder and a distribution inlet pipe (41), the lower end of the distribution cylinder is sealed and the upper end is open; the distribution cylinder is provided with a distribution hole (44); the distribution inlet pipe (41) is connected to the hollow cavity inside the distribution cylinder; and A baffle assembly is disposed inside the housing (2); the upper end of the baffle assembly is connected to the top of the housing (2) to form a closed end, and its lower end is an open opening; the baffle assembly and the distribution cylinder are nested concentrically, one above the other, to form a baffle channel; the exhaust gas outlet (14) is located outside the baffle channel; The discharge port of the cyanogen chloride feed pipe (3) is located on the center line of the baffle group and the distribution cylinder. After the cyanogen chloride gas entering the center of the shell (2) is cooled down by the first stage of the baffle channel, it is cooled down by the cooling medium in the shell (2) for a second stage. The uncondensed chlorine gas is discharged through the tail gas outlet (14), and the cooled cyanogen chloride is discharged through the discharge port (24) at the bottom of the shell (2), thereby purifying the cyanogen chloride gas.

2. The chlorinated cyan gas purification apparatus according to claim 1, wherein The baffle assembly includes an inner baffle (7) and an outer baffle (8) that are concentrically fitted together. The distribution cylinder is located between the inner baffle (7) and the outer baffle (8), and the distribution cylinder overlaps circumferentially with the inner baffle (7) and the outer baffle (8).

3. The chlorinated cyan gas purification apparatus according to claim 1, wherein The distribution cylinder includes a distribution straight cylinder (43) and a distribution cone cylinder (42) connected to the lower end of the distribution straight cylinder (43). The distribution straight cylinder (43) and the baffle cylinder assembly are concentrically mounted. The distribution air inlet pipe (41) is connected to the distribution cone cylinder (42). The distribution holes (44) are provided on the inner and outer walls of the distribution straight cylinder (43) to achieve stepped cooling.

4. The chlorinated cyan gas purification apparatus according to claim 3, wherein The distance between the upper end of the distribution cylinder (43) and the top inner surface of the shell (2) is 800-1000mm; the lower end of the baffle assembly is flush with the lower end of the distribution cylinder (43).

5. The chlorinated cyan gas purification apparatus according to claim 3, wherein The distribution holes (44) on the inner wall of the distribution cylinder (43) are inclined downwards, and the distribution holes (44) on the outer wall of the distribution cylinder (43) are inclined upwards.

6. The chlorinated cyan gas purification apparatus according to claim 3, wherein The distribution cone (42) is provided with three distribution air inlets (41) evenly arranged along the circumference, and the distribution air inlets (41) are connected to the distribution cone (42) in an upward inclined manner.

7. The chlorinated cyan gas purification apparatus according to claim 3, wherein The lower end of the distribution cone (42) is provided with an auxiliary outlet (45).

8. The chlorinated cyan gas purification apparatus of claim 1, wherein An umbrella-shaped regulator (33) is provided on the port of the chlorocyanide feed pipe (3) that extends into the center of the housing (2). The umbrella-shaped regulator (33) includes an umbrella-shaped baffle (331) and a spring (332). The spring (332) connects the umbrella-shaped baffle (331) to the port of the chlorocyanide feed pipe (3). The umbrella-shaped baffle (331) is pulled away from the chlorocyanide feed pipe (3) by the gas impact force in the chlorocyanide feed pipe (3) by stretching the spring (332). When the gas impact force disappears, it moves closer to the chlorocyanide feed pipe (3) by relying on the reset of the spring (332) and the gravity of the umbrella-shaped baffle (331).

9. The chlorinated cyan gas purification apparatus of claim 1, wherein The chlorocyanide feed pipe (3) is provided with a chlorocyanide feed port (31) and an inert gas feed port (32) arranged in parallel.

10. The chlorinated cyan gas purification apparatus according to claim 1, wherein The housing (2) includes a straight cylindrical shell, a conical shell connected to the lower end of the straight cylindrical shell, and a top cover (1) closed on the upper end of the straight cylindrical shell; the conical shell, the straight cylindrical shell, and the top cover (1) are all jacketed structures with cavities, the cavity of the straight cylindrical shell is connected to the cavity of the conical shell, the conical shell is provided with a first cooling medium inlet (22), the straight cylindrical shell is provided with a first cooling medium outlet (23), and the top cover (1) is provided with a second cooling medium inlet (12) and a second cooling medium outlet (13).

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