Triphosgene feeding device
By designing a triphosgene feeding device with inert gas replacement and solvent circulation, the problems of easy clogging and poor feeding accuracy of triphosgene feeding devices were solved, realizing the stable and accurate addition of triphosgene solution, and reducing energy consumption and safety risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-03-03
AI Technical Summary
Existing phosgene feeding devices are prone to clogging, have poor feeding accuracy, and pose safety risks and high energy consumption problems.
A three-phosgene feeding device, comprising a stirred tank, a metering pump, a circulating pump, and a solids dissolver, was designed. Through inert gas replacement and solvent circulation, the device ensures that the three-phosgene solids are uniformly dissolved and accurately added to the reaction system, preventing pipeline blockage and metering fluctuations.
It enables accurate and stable addition of phosgene solution, reduces labor intensity and energy consumption, avoids pipeline blockage and safety risks, and improves the accuracy of material addition.
Smart Images
Figure CN223959609U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical equipment technology, and in particular to a phosgene feeding device for use in the chemical industry. Background Technology
[0002] Triphosgene, commonly known as solid phosgene, or bis(trichloromethyl) carbonate or BTC, is a stable solid compound that can be sealed and stored at room temperature. Even when boiling, it decomposes into only trace amounts of phosgene and liquid phosgene.
[0003] Solid phosgene is a highly reactive substance that can completely replace the highly toxic phosgene and diphosgene in chemical reactions. The main types of reactions it can participate in include: chloromethylation, carbonate esterification, ureation, isocyanate esterification, chlorination, isonitrile esterification, cyclization reactions, and α-chlorochloroformylation of aldehydes.
[0004] Currently, the acylation reaction in the production process of the imidazole fungicide prochloraz involves first adding solid phosgene to toluene, then heating to dissolve all the solid phosgene, and finally adding the solid phosgene-toluene solution dropwise into the acylation reactor to react with the amine salt. However, this process has the following problems:
[0005] (1) Toluene overstocking: If new toluene is used to dissolve solid phosgene each time, the amount of toluene in the production process will increase and cause overstocking; in addition, the excess toluene can only be sold at a low price, which greatly increases the cost.
[0006] (2) High safety risk: If recycled toluene is used to dissolve solid phosgene, the trace amounts of alkaline substances (triethylamine, n-propylamine, etc.) in the recycled toluene can easily cause the solid phosgene to decompose rapidly, which will cause a high safety risk.
[0007] (3) High energy consumption: Solid phosgene must be heated to dissolve before it can be added dropwise, which not only increases energy consumption, but also causes solid phosgene to precipitate out of the solution at low temperature, leading to pipe blockage.
[0008] (4) Poor accuracy of addition: The addition of phosgene solution by hand has the disadvantages of poor accuracy of addition, high labor intensity and large fluctuation of reaction.
[0009] Therefore, a phosgene feeding device is needed to overcome one or more of the above-mentioned defects. Utility Model Content
[0010] The purpose of this invention is to provide a triphosgene feeding device that can ensure the accurate and stable addition of triphosgene solution to the reaction system, so as to solve the problems of easy clogging and poor feeding accuracy of existing triphosgene feeding equipment.
[0011] To achieve the above objectives, the triphosgene feeding device of this utility model includes a stirred tank, a metering pump, a circulating pump, a first connecting pipe, a second connecting pipe, a third connecting pipe, and a solid dissolver for adding triphosgene solids. The stirred tank is provided with a gas inlet, a liquid inlet, and a liquid outlet. The liquid outlet is connected to the inlets of both the metering pump and the circulating pump via the first connecting pipe. The first connecting pipe is equipped with a feeding inlet control valve for controlling the connection between the liquid outlet and the metering pump inlet. The outlet of the circulating pump is connected to the inlet of the solid dissolver via the second connecting pipe, and the outlet of the solid dissolver is connected to the liquid inlet via the third connecting pipe.
[0012] Compared to existing technologies, this method introduces a high-purity inert gas (such as nitrogen) into the stirred tank through its gas inlet, thereby replacing the internal environment of the stirred tank with the desired working environment. With the cooperation of a circulating pump and a feed inlet control valve, the solvent, after being replaced by the inert gas and metered in, circulates continuously between the stirred tank and the solid dissolver through the first, second, and third connecting pipes. This ensures that the metered triphosgene solids in the solid dissolver gradually and uniformly dissolve into the solvent, forming a solution of consistent concentration and preventing reaction fluctuations caused by the entry of triphosgene solids into the reaction system. The metering pump and feed inlet control valve also ensure that the triphosgene solution is accurately and stably added to the reaction system, preventing the drawbacks of large metering fluctuations, high labor intensity, and poor feeding accuracy caused by manual addition. Furthermore, because the metered triphosgene solids in the solid dissolver gradually and uniformly dissolve into the solvent circulated by the circulating pump, blockages in the first, second, and third connecting pipes are prevented.
[0013] Preferably, the solid dissolver includes a cylindrical body, a sealing cap, a hollow disperser, an inlet pipe forming the inlet end of the solid dissolver, an outlet pipe forming the outlet end of the solid dissolver, and a mesh basket for containing triphosgene solids. The disperser is located in the internal space of the cylindrical body, and the inlet end of the disperser is connected to the inlet pipe in a mating connection. The inlet pipe is sealed and fixedly connected to the cylindrical body and protrudes outward from the cylindrical body. The mesh basket is located in the internal space of the cylindrical body and is positioned above the outlet end of the disperser. The sealing cap is detachably sealed to the cylindrical body and also seals the opening of the internal space of the cylindrical body. The outlet pipe is sealed and fixedly connected to the cylindrical body and protrudes outward from the cylindrical body. The outlet pipe is also connected to the internal space of the cylindrical body.
[0014] Preferably, the outlet end of the disperser is tapered, wider at the top and narrower at the bottom, and the outlet end of the disperser is directly opposite the bottom of the mesh basket. The opening of the internal space of the cylinder is arranged facing upwards, and the sealing cap is placed on the cylinder from above.
[0015] Preferably, the inlet end of the disperser is sealed and welded to the inlet pipe body.
[0016] Preferably, the side wall of the cylinder is provided with a window structure with a scraper, the scraper being configured to scrape the window structure.
[0017] Preferably, the scraper is made of polytetrafluoroethylene sheet with a thickness of 2 mm to 5 mm.
[0018] Preferably, the inlet pipe and the outlet pipe are arranged to intersect with the side wall of the cylinder, and a drain pipe communicating with the internal space of the cylinder is provided on the bottom of the cylinder, and a drain control valve is provided on the drain pipe.
[0019] Preferably, the first connecting pipe is also provided with a vessel outlet control valve near the liquid outlet end and a pump inlet control valve near the inlet end of the circulating pump, wherein the feed inlet control valve is adjacent to the inlet end of the metering pump.
[0020] Preferably, the first connecting pipe includes a main pipe and a first branch pipe and a second branch pipe branching from the main pipe. The liquid outlet end is connected to the main pipe, the inlet end of the metering pump is connected to the first branch pipe, the inlet end of the circulating pump is connected to the second branch pipe, and the feeding inlet control valve is located on the first branch pipe.
[0021] Preferably, the second connecting pipe is provided with a pump outlet control valve near the outlet end of the circulating pump and a solvent inlet control valve near the inlet end of the solid solvent, and the third connecting pipe is provided with a solvent outlet control valve near the outlet end of the solid solvent and a vessel inlet control valve near the liquid inlet end.
[0022] Preferably, the metering pump is a diaphragm metering pump; the outlet end of the metering pump is connected to a feeding pipe and a feeding outlet control valve provided on the feeding pipe.
[0023] Preferably, the liquid outlet is located at the bottom of the stirred tank, and the gas inlet and liquid inlet are located on the top sides of the stirred tank.
[0024] Preferably, the stirred tank is further provided with a filling end and a gas outlet end at a position between its top and bottom. Attached Figure Description
[0025] Figure 1This is a plan view of the three-phosgene feeding device of this utility model.
[0026] Figure 2 yes Figure 1 The diagram shows a plan view of the mixing vessel in the phosgene feeding device.
[0027] Figure 3 yes Figure 1 The diagram shows a plan view of the metering pump in the phosgene feeding device.
[0028] Figure 4 yes Figure 1 The diagram shows a plan view of the circulating pump in the phosgene feeding device.
[0029] Figure 5 yes Figure 1 The diagram shows the first connecting pipe and its feed inlet control valve, reactor outlet control valve and pump inlet control valve in the phosgene feeding device.
[0030] Figure 6 yes Figure 1 The diagram shows a plan view of the solids dissolver in the phosgene feeding device. Detailed Implementation
[0031] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.
[0032] Please see Figure 1 The triphosgene feeding device 100 of this utility model gradually and uniformly dissolves the triphosgene solid in the solvent through the circulation of the solvent, thereby obtaining a triphosgene solution with a consistent concentration, and accurately and stably adding the triphosgene solution to the external reaction system.
[0033] The triphosgene feeding device of this utility model includes a stirring tank 10, a metering pump 20, a circulating pump 30, a first connecting pipe 40, a second connecting pipe 50, a third connecting pipe 60, and a solid dissolver 70 for adding triphosgene solids into the tank (referring to the solid dissolver 70). The stirring tank 10 is provided with a gas inlet 11, a liquid inlet 12, and a liquid outlet 13. The liquid outlet 13 is connected to the inlet 21 of the metering pump 20 and the inlet 31 of the circulating pump 30 via the first connecting pipe 40. The first connecting pipe 40 is provided with a feeding inlet control valve 41 for controlling the connection between the liquid outlet 13 and the inlet 21 of the metering pump 20. The outlet 32 of the circulating pump 30 is connected to the inlet 71 of the solid dissolver 70 via the second connecting pipe 50, and the outlet 72 of the solid dissolver 70 is connected to the liquid inlet 12 via the third connecting pipe 60. Therefore, the liquid is cut off at the feeding inlet control valve 41. When the outlet 13 is connected to the inlet 21 of the metering pump 20, and under the operation of the circulation pump 30, the solvent added to the stirred tank 10 flows into the solid dissolver 70 along the first connecting pipe 40 and the second connecting pipe 50, and then flows back to the stirred tank 10 along the third connecting pipe 60, thereby achieving the purpose of solvent circulation. When the triphosgene solid in the solid dissolver 70 is completely dissolved in the solvent, at this time, when the connection between the liquid outlet 13 and the inlet 21 of the metering pump 20 is opened by the feed inlet control valve 41, the triphosgene solution can be accurately and stably added to the external reaction system by the metering pump 20. More specifically, as follows:
[0034] Combination Figure 6As an example, the solids dissolver 70 includes a cylinder 73, a sealing cap 74, a hollow disperser 75, an inlet pipe (i.e., 71 also refers to the inlet pipe) for forming the inlet end 71 of the solids dissolver 70, an outlet pipe (i.e., 72 also refers to the outlet pipe) for forming the outlet end 72 of the solids dissolver 70, and a mesh basket 76 for holding triphosgene solids. The disperser 75 is located in the internal space 731 of the cylinder 73. The inlet end 751 of the disperser 75 is also connected to the inlet pipe 71 in a mating manner to meet the requirement that the solvent flows directly into the disperser 75 from the inlet pipe 71. The inlet pipe 71 is fixedly connected to the cylinder 73 in a sealed manner, that is, the inlet pipe 71 is fixedly connected to the cylinder 73, and the mating part of the inlet pipe 71 and the cylinder 73 is also sealed to prevent the solvent in the cylinder 73 from leaking from the mating part. The inlet pipe 71 also protrudes outward from the cylinder 73 to facilitate the assembly operation of the inlet pipe 71 and the second connecting pipe 50. The mesh basket 76 is located in the internal space 731 of the cylinder 73, above the outlet end 752 of the disperser 75, to meet the requirement that the solvent flowing into the disperser 75, after dispersion, washes the triphosgene solid contained in the mesh basket 76. Because the solvent is dispersed and washes the triphosgene solid contained in the mesh basket 76 after passing through the disperser 75, the solvent and the triphosgene solid contained in the mesh basket 76 are in sufficient contact. The sealing cap 74 is detachably sealed to the cylinder 73 to meet the requirement of adding triphosgene solid to the mesh basket 76; the sealing cap 74 also seals the opening 7311 of the internal space 731 of the cylinder 73 to meet the requirement of forming a sealed space within the internal space 731 of the solid dissolver 70. The outlet pipe 72 is fixedly connected to the cylinder 73 in a sealed manner; that is, the outlet pipe 72 is fixedly connected to the cylinder 73, and the mating point between the outlet pipe 72 and the cylinder 73 is also sealed to prevent solvent leakage from the cylinder 73. The outlet pipe 72 protrudes outward from the cylinder 73 and is also connected to the internal space 731 of the cylinder 73 to meet the requirement that the solvent after being flushed by the phosgene solid contained in the mesh basket 76 first flows into the internal space 731 of the cylinder 73 and then flows out from the outlet pipe 72. Specifically, in Figure 1 and Figure 6In this example, the outlet end 752 of the disperser 75 is tapered, wider at the top and narrower at the bottom, and the outlet end 752 of the disperser 75 is directly opposite the bottom 761 of the grid basket 76. This design allows for more thorough contact between the solvent and the triphosgene solid contained in the grid basket 76. Alternatively, as an example, the maximum outer diameter of the outlet end 752 of the disperser 75 is the same as the outer diameter of the grid basket 76, but this is not a limitation. In addition, the opening 7311 of the internal space 731 of the cylinder 73 is arranged upward to facilitate the operation of adding triphosgene solid to the grid basket 76 from the top of the cylinder 73. Furthermore, the sealing cap 74 is placed on the cylinder 73 from above and can be fixedly connected to the cylinder 73 by means of screws, such as, but not limited to, them, making it easier to install and remove the sealing cap 74 from the cylinder 73.
[0035] like Figure 6 As shown, as an example, the inlet end 751 of the disperser 75 is sealed and welded to the inlet pipe body 71, making the fixation and sealing between the disperser 75 and the inlet pipe body 71 more reliable, thereby allowing the disperser 75 to be more reliably suspended within the internal space 731 of the cylinder 73. Furthermore, in Figure 6 As an example, the side wall 732 of the cylinder 73 is provided with a viewing window structure 734 with a scraper 733. The scraper 733 is configured to scrape the viewing window structure 734. Therefore, the dissolution of phosgene solids in the grid basket 76 can be observed in a timely manner with the help of the viewing window structure 734. The scraper 733 can also be used to scrape away materials that obstruct the view within the viewing window structure 734, facilitating observation. Alternatively, in... Figure 6 As an example, scraper 733 is made of polytetrafluoroethylene sheet with a thickness of 2 mm to 5 mm, so that scraper 733 has the advantages of low coefficient of friction, corrosion resistance, high temperature resistance and insulation; obviously, scraper 733 can also be made of other materials according to actual needs, so it is not limited to Figure 6 The above is the limit.
[0036] For example Figure 6 As shown, as an example, the inlet pipe 71 and the outlet pipe 72 are arranged to intersect the side wall 731 of the cylinder 73. Alternatively, as an example, the inlet pipe 71 and the outlet pipe 72 intersect the side wall 731 of the cylinder 73 perpendicularly, which makes it easier to fix the side wall 731 of the cylinder 73 to the inlet pipe 71 and the outlet pipe 72 respectively. A drain pipe 736 communicating with the internal space 731 of the cylinder 73 is provided on the bottom 735 of the cylinder 73. A drain control valve 737 is provided on the drain pipe 736. With the cooperation of the drain pipe 736 and the drain control valve 737, the drain control valve 737 can be opened when draining is needed and closed when draining is not needed. In addition, since the drain pipe 736 is located at the bottom 735 of the cylinder 73, the draining is more thorough.
[0037] like Figure 1 and Figure 2 As shown, as an example, the liquid outlet 13 is located at the bottom 14 of the stirred tank 10 to allow for more thorough solvent (solution) outflow; the gas inlet 11 and liquid inlet 12 are located on either side of the top 15 of the stirred tank 10 to provide additional stirring for the solvent as it flows from the liquid inlet 12 to the liquid outlet 13, further improving the solvent's solubility. Additionally, in Figure 1 and Figure 2 As an example, the stirred tank 10 is provided with a filling end 16 and a gas outlet end 17 located between its top 15 and bottom 14. The filling end 16 facilitates the operation of adding solvent into the stirred tank 10 by the operator, and the gas outlet end 17 enables the inert gas (such as, but not limited to, high-purity nitrogen) that enters the stirred tank 10 from the gas inlet end 11 to be discharged from the gas outlet end 17.
[0038] like Figure 1 and Figure 5 As shown, as an example, the first connecting pipe 40 is also equipped with a vessel outlet control valve 42 adjacent to the liquid outlet end 13 and a pump inlet control valve 43 adjacent to the inlet end 31 of the circulating pump 30. The feed inlet control valve 41 is adjacent to the inlet end 21 of the metering pump 20. The vessel outlet control valve 42 is used to cut off the connection between the liquid outlet end 13 and the first connecting pipe 40 during the process of introducing high-purity nitrogen gas to the stirred vessel 10 for purging. The pump inlet control valve 43 is used to keep the triphosgene solution in the open state during the process of the metering pump 20 adding the triphosgene solution to the external reaction system, preventing the triphosgene solution from entering the circulating pump 30. Specifically, in Figure 1 and Figure 5 As an example, the first connecting pipe 40 includes a main pipe 40a and a first branch pipe 40b and a second branch pipe 40c branching from the main pipe 40a. The liquid outlet 13 is connected to the main pipe 40a, the first branch pipe 40b is connected to the inlet 21 of the metering pump 20, and the second branch pipe 40c is connected to the inlet 31 of the circulating pump 30. The feed inlet control valve 41 is located on the first branch pipe 40b. Therefore, by designing the first connecting pipe 40 as including the main pipe 40a and the first branch pipe 40b and the second branch pipe 40c branching from the main pipe 40a, the first connecting pipe 40 has a three-way function, and the connection operation of the first connecting pipe 40 to the liquid outlet 13, the inlet 21 of the metering pump 20, and the inlet 31 of the circulating pump 30 is simplified.
[0039] like Figure 1As shown, as an example, the second connecting pipe 50 is provided with a pump outlet control valve 51 adjacent to the outlet end 32 of the circulating pump 30 and a dissolver inlet control valve 52 adjacent to the inlet end 71 of the solid dissolver 70; the third connecting pipe 60 is provided with a dissolver outlet control valve 61 adjacent to the outlet end 72 of the solid dissolver 70 and a vessel inlet control valve 62 adjacent to the liquid inlet end 12, so that the connection between the liquid inlet end 12 and the third connecting pipe 60 can be cut off by the vessel inlet control valve 62 during the process of introducing high-purity nitrogen gas replacement into the stirred vessel 10.
[0040] like Figure 1 and Figure 3 As shown, as an example, the metering pump 20 is a diaphragm metering pump to improve its lifespan, corrosion resistance, and metering accuracy. Additionally, the outlet end 22 of the metering pump 20 is connected to a feeding pipe 23 and a feeding outlet control valve 24 located on the feeding pipe 23.
[0041] The working principle of the three-phosgene feeding device of this utility model will be explained with reference to the accompanying drawings:
[0042] First, high-purity nitrogen is introduced to replace the internal environment of the stirred tank 10 to a suitable standard. Before replacement, the tank outlet control valve 42 and the tank inlet control valve 62 need to be closed.
[0043] Next, the metered solid triphosgene is added to the grid basket 76 of the solid dissolver 70, and then the solid dissolver 70 is sealed; the metered solvent is added to the stirred tank 10; the tank outlet control valve 42, the pump inlet control valve 43, the pump outlet control valve 51, the dissolver inlet control valve 52, the dissolver outlet control valve 61, and the tank inlet control valve 62 are opened, so that the circulating pump 30, the solid dissolver 70, and the stirred tank 10 form a passage.
[0044] Then, the circulation pump 30 is started, allowing the solvent to enter the solid dissolver 70 through the circulation pump 30 and dissolve in contact with the triphosgene solid. Through continuous circulation and dissolution, a triphosgene solution is obtained. In the solid dissolver 70, the dissolution of the triphosgene solid can be observed through the viewing window structure 734. When all the triphosgene solid has dissolved, the circulation pump 30, pump inlet control valve 43, pump outlet control valve 51, dissolver inlet control valve 52, dissolver outlet control valve 61, and reactor inlet control valve 62 are then closed to complete the dissolution process.
[0045] When triphosgene solution needs to be added, open the feed inlet control valve 41 and the feed outlet control valve 24, and the metering pump 20 will accurately add the triphosgene solution to the external reaction system.
[0046] Compared with existing technologies, high-purity inert gas (such as nitrogen) is introduced into the gas inlet 11 of the stirred tank 10 to replace the internal environment of the stirred tank 10 with the desired working environment. With the cooperation of the circulation pump 30 and the feed inlet control valve 41, the solvent that has been replaced by inert gas and metered in is continuously circulated between the stirred tank 10 and the solid dissolver 70 through the first connecting pipe 40, the second connecting pipe 50 and the third connecting pipe 60. This allows the metered triphosgene solid contained in the solid dissolver 70 to gradually and uniformly dissolve into the solvent, forming a solution with a consistent concentration, preventing reaction fluctuations caused by the entry of triphosgene solid into the reaction system. With the cooperation of the metering pump 20 and the feed inlet control valve 41, the triphosgene solution is accurately and stably added to the reaction system, preventing the defects of large metering fluctuations, high labor intensity and poor feeding accuracy caused by manual addition. Furthermore, since the metered phosgene solid contained in the solid dissolver 70 is gradually and uniformly dissolved into the solvent circulated by the circulation pump 30, blockage of the first connecting pipe 40, the second connecting pipe 50 and the third connecting pipe 60 can be prevented.
[0047] It is worth noting that, since the phosgene feeding device 100 of this utility model operates in a corrosive environment, which is well known in the art, the material selected for the phosgene feeding device 100 is a corrosion-resistant material. For example, the materials selected for the stirring tank 10, metering pump 20, circulating pump 30, first connecting pipe 40, second connecting pipe 50, third connecting pipe 60, solid dissolver 70, feeding inlet control valve 41, feeding pipe 23, feeding outlet control valve 24, tank outlet control valve 42, pump inlet control valve 43, pump outlet control valve 51, dissolver inlet control valve 52, dissolver outlet control valve 61, tank inlet control valve 62, and drain valve 737 are stainless steel, preferably 316 series stainless steel. Additionally, the gas inlet end 11 is connected to a gas pipe 80 with a control valve 81. In addition, the stirred tank 10 can be selected as a jacketed and heat-transferable stainless steel stirred reactor. The feed inlet control valve 41, feed outlet control valve 24, tank outlet control valve 42, pump inlet control valve 43, pump outlet control valve 51, dissolver inlet control valve 52, dissolver outlet control valve 61, tank inlet control valve 62 and drain valve 737 can each be selected as a shut-off valve. The mesh basket 76 can be selected as a flat-mouth stainless steel mesh basket.
[0048] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.
Claims
1. A phosgene charging device, characterized by, The device comprises a stirred tank, a metering pump, a circulating pump, a first connecting pipeline, a second connecting pipeline, a third connecting pipeline, and a solid dissolver for adding triphosgene solid into which, the stirred tank is provided with a gas inlet end, a liquid inlet end and a liquid outlet end, the liquid outlet end is communicated with the inlet end of the metering pump and the circulating pump respectively through the first connecting pipeline, the outlet end of the circulating pump is communicated with the inlet end of the solid dissolver through the second connecting pipeline, the outlet end of the solid dissolver is communicated with the liquid inlet end through the third connecting pipeline, the first connecting pipeline is provided with a feeding inlet control valve for controlling the on-off of the liquid outlet end and the inlet end of the metering pump.
2. The phosgene charging device according to claim 1, characterized in that The solid dissolver comprises a cylinder, a sealing cover, a hollow disperser, an inlet pipe for forming the inlet end of the solid dissolver, an outlet pipe for forming the outlet end of the solid dissolver, and a grid basket for containing triphosgene solid, the disperser is located in the internal space of the cylinder, the inlet end of the disperser is also in matched docking communication with the inlet pipe, the inlet pipe is in sealed fixed connection with the cylinder and protrudes outward from the cylinder, the grid basket is located in the internal space of the cylinder and above the outlet end of the disperser, the sealing cover is in detachable sealed connection with the cylinder and seals the opening of the internal space of the cylinder, the outlet pipe is in sealed fixed connection with the cylinder and protrudes outward from the cylinder, and the outlet pipe is also in communication with the internal space of the cylinder.
3. The phosgene charging device according to claim 2, characterized in that The outlet end of the disperser is conical with a large upper end and a small lower end, the outlet end of the disperser is opposite to the bottom of the grid basket, the opening of the internal space of the cylinder is arranged upward, the sealing cover covers the cylinder from above, and the inlet end of the disperser is sealed welded with the inlet pipe.
4. The phosgene charging device of claim 2, wherein, A window structure with a scraper is arranged on the side wall of the cylinder, the scraper is configured to scrape the window structure, and the thickness of the scraper is 2-5 mm of polytetrafluoroethylene plate.
5. The phosgene charging apparatus of claim 2, wherein, The inlet pipe and the outlet pipe are each arranged intersecting with the side wall of the cylinder, a blowdown pipe is arranged on the bottom of the cylinder and is in communication with the internal space of the cylinder, and a blowdown control valve is arranged on the blowdown pipe.
6. The phosgene charge device of claim 1, wherein, A tank outlet control valve adjacent to the liquid outlet end and a pump inlet control valve adjacent to the inlet end of the circulating pump are also arranged on the first connecting pipeline, and the feeding inlet control valve is adjacent to the inlet end of the metering pump.
7. The phosgene charging device of claim 6, wherein, The first connecting pipeline comprises a main pipeline and first and second branch pipelines branched from the main pipeline, the liquid outlet end is communicated with the main pipeline, the inlet end of the metering pump is communicated with the first branch pipeline, the inlet end of the circulating pump is communicated with the second branch pipeline, and the feeding inlet control valve is arranged on the first branch pipeline.
8. The phosgene charge device of claim 1, wherein, The second connecting pipe is provided with a pump outlet control valve adjacent to the outlet end of the circulating pump and a dissolver inlet control valve adjacent to the inlet end of the solid dissolver, and the third connecting pipe is provided with a dissolver outlet control valve adjacent to the outlet end of the solid dissolver and a kettle inlet control valve adjacent to the liquid inlet end.
9. The phosgene charge device of claim 1, wherein, The metering pump is a diaphragm metering pump, and the outlet end of the metering pump is connected with a feeding pipe and a feeding outlet control valve arranged on the feeding pipe.
10. The phosgene charge device of claim 1, wherein, The liquid outlet end is located at the bottom of the stirred kettle, the gas inlet end and the liquid inlet end are located at two sides of the top of the stirred kettle, and the stirred kettle is further provided with a filling end and a gas outlet end at a position between the top and the bottom of the stirred kettle.