Continuous preparation device of phosphorus trichloride
By designing a continuous preparation device for phosphorus trichloride, the heated liquid phosphorus and regulated chlorine gas are used to achieve safe and continuous reaction and heat separation, solving the problem of difficult reaction heat control, and improving production efficiency and safety.
Patent Information
- Application Number
- CN202421668123.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-07-15
AI Technical Summary
When preparing phosphorus trichloride, the reaction between phosphorus and chlorine produces a large amount of heat, causing the reaction solution to be sprayed, which poses safety risks and affects production efficiency.
A continuous preparation device for phosphorus trichloride is designed. By heating the phosphorus to form liquid phosphorus, and the ratio and flow rate of phosphorus and chlorine are adjusted using a flowmeter and solenoid valve to react in the phosphorus trichloride mother liquor to form phosphorus trichloride. At the same time, the heat generated by the reaction is used to achieve separation of phosphorus trichloride, reduce energy consumption, and control the solenoid valve through the pressure detection component to avoid excessive reaction.
The safe and continuous reaction between phosphorus and chlorine is achieved, the contact between phosphorus and air is avoided, and the use of heat to separate phosphorus trichloride is used to reduce energy consumption and prevent solution ejection caused by excessive reactions.
Smart Images
Figure CN222586595U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical preparation, in particular to a continuous preparation device of phosphorus trichloride. Background Art
[0002] When preparing phosphorus trichloride, phosphorus and chlorine are usually used as raw materials. However, due to the flammable nature of phosphorus, it cannot be directly exposed to air, so it is usually reacted in a solution. However, since phosphorus and chlorine release a large amount of heat during the reaction, if excessive phosphorus and chlorine are added, the heat of the reaction between phosphorus and chlorine cannot be dissipated in a short time, and the reaction solution will be sprayed out, which has safety hazards on the one hand and affects production efficiency on the other. Utility Model Content
[0003] The utility model provides a continuous preparation device of phosphorus trichloride, comprising a reactor, wherein phosphorus trichloride mother liquor is arranged in the reactor, the reactor is provided with a first feeding conduit and a second feeding conduit, outlets of the first feeding conduit and the second feeding conduit are located below the liquid surface of the phosphorus trichloride mother liquor, the first feeding conduit is connected with a phosphorus reserve tank, the second feeding conduit is connected with a liquid chlorine reserve tank, a first flow meter and a first electromagnetic valve are arranged on the first feeding conduit, a second flow meter and a second electromagnetic valve are arranged on the second feeding conduit, a discharge conduit is arranged above the reactor, the inlet of the discharge conduit is located above the phosphorus trichloride mother liquor, a pressure detection component is arranged on the top of the reactor, the pressure detection component comprises a movable rod and a spring, the movable rod is sleeved on the bottom of the reactor, a side wall of the movable rod is sealed and connected with the reactor, a first contact is arranged on the top of the movable rod, a second contact matching the first contact is arranged above the movable rod, the first contact is electrically connected with the first electromagnetic valve and the second electromagnetic valve, and the first contact is connected with a power supply.
[0004] Furthermore, a cooling device is provided on the periphery of the reactor.
[0005] Furthermore, the solenoid valve includes a liquid inlet and a liquid outlet, a valve core is provided between the liquid inlet and the liquid outlet, the valve core is arranged in a valve seat groove through a spring, a coil is provided on the outer periphery of the valve seat groove, and the valve core moves to open and close the channel between the liquid inlet and the liquid outlet.
[0006] Furthermore, a heating device is provided on the outer periphery of the phosphorus storage tank.
[0007] The technical solution of the utility model has the following technical effects:
[0008] Phosphorus is heated to form liquid phosphorus, and then the first flowmeter and the second flowmeter can adjust the ratio and flow rate of phosphorus and chlorine, so that phosphorus and chlorine enter the phosphorus trichloride mother liquor in a certain ratio, and react in the phosphorus trichloride mother liquor to form phosphorus trichloride. In the process of forming phosphorus trichloride, heat is released, so that part of the phosphorus trichloride is heated and gasified and discharged from the discharge pipe. Since phosphorus and liquid continue to flow into the phosphorus trichloride mother liquor through the flowmeter, the reaction can be continuously carried out. By introducing liquid phosphorus into the solution, phosphorus is prevented from contacting with air, and the heat generated by the reaction is used to separate phosphorus trichloride, reducing energy consumption.
[0009] When the total amount of phosphorus and chlorine in the phosphorus trichloride mother liquor is large and a violent reaction occurs, the pressure in the reactor increases, thereby lifting the movable rod of the pressure detection component, so that the first contact point contacts the second contact point, thereby controlling the first solenoid valve and the second solenoid valve to operate, closing the inflow of phosphorus and liquid chlorine, avoiding excessive phosphorus and liquid chlorine from flowing into the phosphorus trichloride mother liquor, and preventing solution spraying caused by excessive reaction. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural diagram of embodiment 1.
[0011] Figure 2 It is a schematic cross-sectional structure diagram of the first embodiment.
[0012] Figure 3 It is a structural schematic diagram of the pressure detection component.
[0013] Figure 4 It is a structural diagram of the solenoid valve.
[0014] Reactor 1, first feed conduit 11, second feed conduit 12, phosphorus storage tank 2, liquid chlorine storage tank 3, first flow meter 41, first solenoid valve 42, second flow meter 51, second solenoid valve 52, discharge conduit 6, pressure detection assembly 7, movable rod 71, spring 72, first contact 81, second contact 82, cooling device 9, liquid inlet 43, liquid outlet 44, valve core 45, spring 46, valve seat groove 47, coil 48, heating device 21. DETAILED DESCRIPTION
[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The automatic molten iron handling system for a sandwich spheroidizing process involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.
[0016] A continuous preparation device of phosphorus trichloride comprises a reactor 1, wherein phosphorus trichloride mother liquor is arranged in the reactor 1, the reactor 1 is provided with a first feed conduit 11 and a second feed conduit 12, the outlets of the first feed conduit 11 and the second feed conduit 12 are located below the liquid surface of the phosphorus trichloride mother liquor, the first feed conduit 11 is connected to a phosphorus reserve tank 2, a first flow meter 41 and a first electromagnetic valve 42 are arranged on the first feed conduit 11, and a heating device 21 is arranged on the periphery of the phosphorus reserve tank. Phosphorus is heated to a liquid state by the heating device 21, and then the liquid phosphorus passes through the first conduit 11, and enters the phosphorus trichloride mother liquor through the first flow meter 41 and the first electromagnetic valve 42.
[0017] The second feed conduit 12 is connected to the liquid chlorine storage tank 3. The second feed conduit 12 is provided with a second flow meter 51 and a second solenoid valve 52. The liquid chlorine passes through the second conduit 12, the second flow meter 51 and the second solenoid valve 52 and enters the phosphorus trichloride mother liquor.
[0018] A discharge conduit 6 is provided above the reactor, and the inlet of the discharge conduit is located above the phosphorus trichloride mother solution. When phosphorus and chlorine come into contact in the phosphorus trichloride solution, a reaction occurs to produce phosphorus trichloride. Heat is released at the same time, and the heat released causes part of the phosphorus trichloride to be gasified, and the gasified phosphorus trichloride is discharged from the discharge conduit 6. A cooling device 9 is provided on the periphery of the reactor, and when the temperature of the reactor is high, the temperature of the reactor can be lowered by the cooling device 9.
[0019] Phosphorus is heated to form liquid phosphorus, and then the first flowmeter and the second flowmeter can adjust the ratio and flow rate of phosphorus and chlorine, so that phosphorus and chlorine enter the phosphorus trichloride mother liquor in a certain ratio, and react in the phosphorus trichloride mother liquor to form phosphorus trichloride. In the process of forming phosphorus trichloride, heat is released, so that part of the phosphorus trichloride is heated and gasified and discharged from the discharge pipe. Since phosphorus and liquid continue to flow into the phosphorus trichloride mother liquor through the flowmeter, the reaction can be continuously carried out. By introducing liquid phosphorus into the solution, phosphorus is prevented from contacting with air, and the heat generated by the reaction is used to separate phosphorus trichloride, reducing energy consumption.
[0020] A pressure detection assembly 7 is provided on the top of the reactor. The pressure detection assembly includes a movable rod 71 and a spring 72. The movable rod 71 is sleeved on the top of the reactor. The side wall of the movable rod 71 is sealed and connected to the reactor. A first contact 81 is provided on the top of the movable rod. A second contact 82 matching the first contact 81 is provided above the movable rod. The first contact 81 is electrically connected to the first electromagnetic valve 42 and the second electromagnetic valve 52. The first contact 81 is connected to a power source. When the pressure of the reactor is relatively high, the pressure lifts the movable rod 71, and the spring 72 is compressed, so that the first contact 81 and the second contact 82 are in contact, so that the first electromagnetic valve and the second electromagnetic valve are closed, and the injection of phosphorus and chlorine is stopped. When the pressure drops, the spring 72 recovers and drives the movable rod 71 to move downward, the first contact 81 and the second contact 82 are disconnected, and phosphorus and chlorine are re-injected into the phosphorus trichloride mother liquor. The phosphorus trichloride generation reaction continues.
[0021] The solenoid valve includes a liquid inlet 43 and a liquid outlet 44. A valve core 45 is provided between the liquid inlet 43 and the liquid outlet 44. The valve core 45 is arranged in a valve seat groove 47 through a spring 46. A coil 48 is provided on the periphery of the valve seat groove 47. The valve core moves to open and close the passage between the liquid inlet and the liquid outlet. When the first contact 81 and the second contact 82 are in contact, the coil 48 is energized to attract the valve core 45 to block the passage between the liquid inlet 43 and the liquid outlet 44 and stretch the spring 46, so that phosphorus and chlorine are no longer injected into the reactor. When the first contact 81 and the second contact 82 are disconnected, the coil 48 is de-energized, and the valve core 45 is reset under the action of the spring 46, so that the liquid inlet 43 and the liquid outlet 44 are connected, and phosphorus and chlorine are injected into the reactor again.
[0022] When the total amount of phosphorus and chlorine in the phosphorus trichloride mother liquor is large and a violent reaction occurs, the pressure in the reactor increases, thereby lifting the movable rod of the pressure detection component, so that the first contact point contacts the second contact point, thereby controlling the first solenoid valve and the second solenoid valve to operate, closing the inflow of phosphorus and liquid chlorine, avoiding excessive phosphorus and liquid chlorine from flowing into the phosphorus trichloride mother liquor, and preventing solution spraying caused by excessive reaction.
[0023] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;
[0024] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;
[0025] Finally: 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, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A continuous preparation device for phosphorus trichloride, characterized in that: The invention comprises a reactor, wherein phosphorus trichloride mother liquor is arranged in the reactor, the reactor is provided with a first feed conduit and a second feed conduit, outlets of the first feed conduit and the second feed conduit are located below the liquid surface of the phosphorus trichloride mother liquor, the first feed conduit is connected to a phosphorus reserve tank, the second feed conduit is connected to a liquid chlorine reserve tank, a first flow meter and a first solenoid valve are arranged on the first feed conduit, a second flow meter and a second solenoid valve are arranged on the second feed conduit, a discharge conduit is arranged above the reactor, the inlet of the discharge conduit is located above the phosphorus trichloride mother liquor, a pressure detection assembly is arranged on the top of the reactor, the pressure detection assembly comprises a movable rod and a spring, the movable rod is sleeved on the bottom of the reactor, the side wall of the movable rod is sealed and connected to the reactor, a first contact is arranged on the top of the movable rod, a second contact matching the first contact is arranged above the movable rod, the first contact is electrically connected to the first solenoid valve and the second solenoid valve, and the first contact is connected to a power supply.
2. The continuous preparation device of phosphorus trichloride according to claim 1, characterized in that: A cooling device is arranged on the periphery of the reaction kettle.
3. The continuous preparation device of phosphorus trichloride according to claim 1, characterized in that: The solenoid valve comprises a liquid inlet and a liquid outlet, a valve core is arranged between the liquid inlet and the liquid outlet, the valve core is arranged in a valve seat groove through a spring, a coil is arranged on the outer periphery of the valve seat groove, and the valve core moves to open and close the channel between the liquid inlet and the liquid outlet.
4. The continuous preparation device of phosphorus trichloride according to claim 1, characterized in that: A heating device is arranged on the outer periphery of the phosphorus storage tank.