A device for recycling waste heat of phosphorus trichloride reaction

Abstract

The application relates to the technical field of waste heat recovery, and discloses a phosphorus trichloride reaction waste heat recycling device, which comprises a base, a reaction kettle and an energy storage box are fixedly installed at the top of the base, the reaction kettle is located at the left side of the energy storage box, a function box is fixedly installed at the top of the reaction kettle, the same piston cylinder is fixedly installed at the top of the energy storage box and the right side of the function box, a motor is fixedly installed on the top inner wall of the function box, a stirring mechanism is arranged in the reaction kettle, a feeding pipe is arranged at the left side of the reaction kettle, a jacket is arranged outside the reaction kettle, and an oil feeding pipe is arranged at the left side of the jacket. The application has the following advantages and effects: the piston mechanism is arranged, when the piston plate slides to the right, gas is pressed into water in the energy storage box through the breather pipe, the water is uniformly heated by the water disturbance in the process of the bubble rising and breaking in the water, and the purpose of avoiding the situation that the local water temperature is too high or too low can be achieved.

Description

Technical Field

[0001] This application relates to the field of waste heat recovery technology, and in particular to a device for recovering and utilizing waste heat from a phosphorus trichloride reaction. Background Technology

[0002] In the chemical production field, phosphorus trichloride, as an important basic chemical raw material, is widely used in the synthesis of pesticides, pharmaceuticals, flame retardants, and other products. However, chemical reactions involving phosphorus trichloride usually involve the release of a large amount of heat. Directly discharging this waste heat not only results in a huge waste of energy but also increases the consumption of cooling water, raising production costs and equipment load.

[0003] In practical use, it was found that in the heat exchange process of existing equipment, the natural convection of static water is insufficient to meet the demand for rapid and efficient heat transfer. This results in obvious water temperature stratification in the energy storage tank, with overheating in the area near the heat pipe and undercooling in the area away from it. This not only reduces the heat exchange efficiency but also easily causes local high-temperature corrosion of the equipment. Therefore, we propose a phosphorus trichloride reaction waste heat recovery and utilization device to solve the above problems. Utility Model Content

[0004] The purpose of this application is to provide a waste heat recovery and utilization device for phosphorus trichloride reaction, which can break the phenomenon of uneven local temperature in water and significantly improve the heat exchange efficiency between heat pipe and water.

[0005] The above-mentioned technical objective of this application is achieved through the following technical solution: a waste heat recovery and utilization device for phosphorus trichloride reaction, comprising a base, a reaction vessel and an energy storage box fixedly installed on the top of the base, the reaction vessel being located to the left of the energy storage box, a functional box fixedly installed on the top of the reaction vessel, a piston cylinder fixedly installed on the top of the energy storage box and the right side of the functional box, a motor fixedly installed on the inner wall of the top of the functional box, a stirring mechanism being provided inside the reaction vessel, a material injection pipe being provided on the left side of the reaction vessel, a jacket being provided on the outside of the reaction vessel, and an oil injection pipe being provided on the left side of the jacket; a fixed plate being fixedly installed on the inner wall of the top and bottom of the functional box, the fixed plate being located to the right of the motor, a reciprocating mechanism being provided between the fixed plate and the functional box, a piston mechanism being provided inside the piston cylinder, an energy conversion mechanism being provided between the energy storage box and the jacket, and a water inlet pipe and a water outlet pipe being provided on the right side of the energy storage box, with the water inlet pipe located above the water outlet pipe.

[0006] A further configuration of this application is: the stirring mechanism includes a stirring shaft and a stirring rod, the stirring shaft is fixedly installed on the motor output shaft, the bottom end of the stirring shaft extends into the reactor, and a stirring rod is provided on the stirring shaft, with the stirring rod located inside the reactor.

[0007] By adopting the above technical solution and setting up a stirring mechanism, the motor can drive the stirring rod to rotate, thereby achieving the goal of stirring the phosphorus trichloride reactants in the reactor, accelerating the mixing and reaction process, and improving the reaction efficiency and product quality.

[0008] A further configuration of this application is as follows: the reciprocating mechanism includes a reciprocating lead screw and a lead screw seat. The reciprocating lead screw is rotatably installed on the inner wall of the right side of the functional box. The left end of the reciprocating lead screw extends to the left side of the fixed plate. The lead screw seat is threaded onto the reciprocating lead screw and is located on the right side of the reciprocating lead screw. A gear mechanism is provided between the reciprocating lead screw and the stirring shaft.

[0009] By adopting the above technical solution and by setting up a reciprocating mechanism, the reciprocating screw can drive the screw seat to move back and forth, thereby achieving the purpose of driving the piston rod to move back and forth.

[0010] A further feature of this application is that the gear mechanism includes two bevel gears, and bevel gears are fixedly sleeved on both the left end of the reciprocating screw and the stirring shaft. The bevel gears are located inside the functional box, and the two bevel gears mesh with each other.

[0011] By adopting the above technical solution and by setting a gear mechanism, the stirring shaft can drive the reciprocating screw to rotate synchronously.

[0012] A further configuration of this application is: the piston mechanism includes a piston plate and a piston rod, the piston plate is slidably installed inside the piston cylinder, the piston rod is fixedly installed on the left side of the piston plate, and the left end of the piston rod is fixedly connected to the right side of the lead screw seat.

[0013] By adopting the above technical solution and by setting up a piston mechanism, the piston rod can drive the piston plate to move back and forth. When the piston plate slides to the right, the gas is forced into the water in the energy storage tank through the vent pipe. As the bubbles rise and burst in the water, they can disturb the water and make the water heat up evenly.

[0014] A further feature of this application is that: an exhaust pipe is provided at the bottom of the piston cylinder, the bottom end of the exhaust pipe extends into the energy storage box, and a vent pipe is provided at the top of the piston cylinder, with both the vent pipe and the exhaust pipe located on the right side of the piston plate.

[0015] By adopting the above technical solution and by setting an exhaust pipe, the air cylinder inside the piston cylinder can enter the water in the energy storage tank through the exhaust pipe, and the air pressure inside the piston cylinder can be balanced through the vent pipe.

[0016] A further feature of this application is that both the exhaust pipe and the vent pipe are equipped with a one-way valve.

[0017] By adopting the above technical solution and by setting a one-way valve, when the piston plate moves to the left, the one-way valve in the vent pipe opens and the one-way valve in the exhaust pipe closes, allowing gas to enter the piston cylinder. When the piston plate moves to the right, the one-way valve in the vent pipe closes and the one-way valve in the exhaust pipe opens, ensuring that the gas flows unidirectionally in the piston cylinder and guaranteeing stable gas transmission.

[0018] A further configuration of this application is as follows: the energy transducer includes a circulating pump, an oil extraction pipe and a heat conduction pipe. A circulating pump is provided on the left side of the energy storage tank. The circulating pump and the jacket are connected by the same oil extraction pipe. A heat conduction pipe is provided inside the energy storage tank. One end of the heat conduction pipe is fixedly connected to the circulating pump, and the other end of the heat conduction pipe is fixedly connected to the jacket.

[0019] By adopting the above technical solution and by setting up an energy conversion mechanism, the circulating pump draws high-temperature heat transfer oil into the heat transfer pipe in the energy storage tank through the oil extraction pipe, where it exchanges heat with the cold water entering through the water inlet pipe. After absorbing heat, the cold water becomes hot water and is discharged from the drain pipe. It can be used for heating in the plant area, preheating of processes, etc., to achieve the purpose of waste heat recovery and utilization.

[0020] A further feature of this application is that the same slide rod is fixedly installed on the right side of the fixed plate and the inner wall of the right side of the function box. The slide rod is located above the reciprocating lead screw, and the lead screw seat is slidably sleeved on the slide rod.

[0021] By adopting the above technical solution and by setting a sliding rod, the lead screw seat can move more smoothly when moving left and right.

[0022] A further feature of this application is that a pressure relief pipe is provided on the top of the energy storage box, and the pressure relief pipe is located on the rear side of the piston cylinder.

[0023] By adopting the above technical solution and installing a pressure relief pipe, the pressure relief pipe can release pressure in time when the gas pressure in the energy storage tank is too high, preventing overpressure from causing safety accidents.

[0024] The beneficial effects of this application are:

[0025] (1) Through the cooperation of motor, stirring shaft and stirring rod, the motor can drive the stirring shaft and stirring rod to rotate, and the stirring rod can stir the phosphorus trichloride reactant in the reactor, thereby accelerating the mixing and reaction process and improving the reaction efficiency and product quality.

[0026] (2) Through the cooperation of bevel gear, reciprocating screw, screw seat, piston rod, piston plate and exhaust pipe, the stirring shaft can drive the piston plate to move back and forth. When the piston plate slides to the right, the gas is pressed into the water in the energy storage tank through the vent pipe. During the process of the bubbles rising and breaking in the water, the water can be disturbed, so that the water is heated evenly. This can avoid the situation of local water temperature being too high or too low, thereby improving the heat exchange efficiency between the heat pipe and the water in the energy storage tank and ensuring that the heat of the high temperature heat transfer oil introduced from the jacket is fully exchanged.

[0027] (3) Through the cooperation of the circulating pump, the oil extraction pipe and the heat transfer pipe, the circulating pump can draw high-temperature heat transfer oil into the heat transfer pipe in the energy storage tank through the oil extraction pipe, and exchange heat with the cold water entering through the water inlet pipe. After absorbing heat, the cold water becomes hot water and is discharged from the drain pipe. It can be used for heating in the plant area, preheating of the process, etc., to achieve the purpose of waste heat recovery and utilization. The cooled heat transfer oil flows back into the jacket to continue to absorb heat, forming a cycle. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural schematic diagram of a waste heat recovery and utilization device for phosphorus trichloride reaction according to this application;

[0030] Figure 2 This is a schematic diagram of the internal structure of the energy storage box of a phosphorus trichloride reaction waste heat recovery and utilization device according to this application;

[0031] Figure 3 This is a schematic diagram of the internal structure of the reactor of a phosphorus trichloride reaction waste heat recovery and utilization device according to this application;

[0032] Figure 4 This is a schematic diagram of the internal structure of the functional box and piston cylinder of a waste heat recovery and utilization device for phosphorus trichloride reaction according to this application.

[0033] In the diagram: 1. Base; 2. Reactor; 201. Feeding pipe; 3. Energy storage box; 301. Water inlet pipe; 302. Drain pipe; 4. Functional box; 401. Motor; 402. Stirring shaft; 403. Stirring rod; 5. Piston cylinder; 501. Piston plate; 502. Piston rod; 503. Exhaust pipe; 504. Vent pipe; 6. Fixing plate; 601. Reciprocating screw; 602. Screw seat; 603. Bevel gear; 7. Jacket; 701. Oil injection pipe; 8. Circulating pump; 801. Oil extraction pipe; 802. Heat conduction pipe. Detailed Implementation

[0034] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] See Figures 1-4 This application provides a waste heat recovery and utilization device for phosphorus trichloride reaction, including a base 1. A reaction vessel 2 and an energy storage box 3 are fixedly installed on the top of the base 1. The reaction vessel 2 is located to the left of the energy storage box 3. A functional box 4 is fixedly installed on the top of the reaction vessel 2. The same piston cylinder 5 is fixedly installed on the top of the energy storage box 3 and the right side of the functional box 4. A motor 401 is fixedly installed on the inner wall of the top of the functional box 4. A stirring mechanism is provided inside the reaction vessel 2. A material injection pipe 201 is provided on the left side of the reaction vessel 2. A jacket 7 is provided on the outside of the reaction vessel 2. An oil injection pipe 701 is provided on the left side of the jacket 7. The same fixing plate 6 is fixedly installed on the inner wall of the top and bottom of the functional box 4. The fixing plate 6 is located to the right of the motor 401. A reciprocating mechanism is provided between the fixing plate 6 and the functional box 4. A piston mechanism is provided inside the piston cylinder 5. An energy conversion mechanism is provided between the energy storage box 3 and the jacket 7. A water inlet pipe 301 and a drain pipe 302 are provided on the right side of the energy storage box 3. The water inlet pipe 301 is located above the drain pipe 302.

[0036] Specifically, the stirring mechanism includes a stirring shaft 402 and a stirring rod 403. The stirring shaft 402 is fixedly installed on the output shaft of the motor 401. The bottom end of the stirring shaft 402 extends into the reactor 2. The stirring rod 403 is provided on the stirring shaft 402 and is located inside the reactor 2.

[0037] Specifically, the reciprocating mechanism includes a reciprocating lead screw 601 and a lead screw seat 602. The reciprocating lead screw 601 is rotatably installed on the inner wall of the right side of the function box 4. The left end of the reciprocating lead screw 601 extends to the left side of the fixed plate 6. The lead screw seat 602 is threaded on the reciprocating lead screw 601. The lead screw seat 602 is located on the right side of the reciprocating lead screw 601. A gear mechanism is provided between the reciprocating lead screw 601 and the stirring shaft 402.

[0038] Specifically, the gear mechanism includes two bevel gears 603. The left end of the reciprocating screw 601 and the stirring shaft 402 are both fixedly fitted with bevel gears 603. The bevel gears 603 are located inside the function box 4, and the two bevel gears 603 mesh with each other.

[0039] Specifically, the piston mechanism includes a piston plate 501 and a piston rod 502. The piston plate 501 is slidably installed inside the piston cylinder 5, and the piston rod 502 is fixedly installed on the left side of the piston plate 501. The left end of the piston rod 502 is fixedly connected to the right side of the lead screw seat 602.

[0040] Specifically, an exhaust pipe 503 is provided at the bottom of the piston cylinder 5, and the bottom end of the exhaust pipe 503 extends into the energy storage box 3. A vent pipe 504 is provided at the top of the piston cylinder 5, and both the vent pipe 504 and the exhaust pipe 503 are located on the right side of the piston plate 501.

[0041] Specifically, both the exhaust pipe 503 and the vent pipe 504 are equipped with one-way valves.

[0042] Specifically, the energy conversion mechanism includes a circulating pump 8, an oil extraction pipe 801, and a heat transfer pipe 802. The circulating pump 8 is located on the left side of the energy storage tank 3. The circulating pump 8 and the jacket 7 are connected by the same oil extraction pipe 801. The heat transfer pipe 802 is located inside the energy storage tank 3. One end of the heat transfer pipe 802 is fixedly connected to the circulating pump 8, and the other end of the heat transfer pipe 802 is fixedly connected to the jacket 7.

[0043] Specifically, the same slide rod is fixedly installed on the right side of the fixed plate 6 and the inner wall of the right side of the function box 4. The slide rod is located above the reciprocating lead screw 601, and the lead screw seat 602 is slidably sleeved on the slide rod.

[0044] Specifically, a pressure relief pipe is installed on the top of the energy storage box 3, and the pressure relief pipe is located on the rear side of the piston cylinder 5.

[0045] In this application, during operation, phosphorus trichloride reactants are first injected into the reactor 2 through the injection pipe 201. The motor 401 is then started, driving the stirring shaft 402 and stirring rod 403 to stir the phosphorus trichloride reactants in the reactor 2, thereby accelerating the mixing and reaction process and improving reaction efficiency and product quality. The stirring shaft 402 drives the reciprocating screw 601 to rotate via the bevel gear 603, causing the screw seat 602 to move back and forth. The sliding rod guides and stabilizes the screw seat 602, which in turn drives the piston plate 501 to slide back and forth within the piston cylinder 5. When the piston plate 501 slides to the right, gas is forced into the water in the energy storage tank 3 through the vent pipe 504. As the bubbles rise and burst in the water, they agitate the water, ensuring uniform heating and preventing localized heating. In cases where the water temperature is too high or too low, the heat exchange efficiency between the heat pipe 802 and the water in the energy storage tank 3 is improved, ensuring that the heat from the high-temperature heat transfer oil introduced from the jacket 7 is fully exchanged. The heat transfer oil in the jacket 7 of the reactor 2 absorbs the waste heat generated by the reaction and heats up. The circulating pump 8 draws the high-temperature heat transfer oil into the heat pipe 802 in the energy storage tank 3 through the oil extraction pipe 801, where it exchanges heat with the cold water entering through the water inlet pipe 301. After absorbing heat, the cold water becomes hot water and is discharged from the drain pipe 302, which can be used for plant heating, process preheating, etc., to achieve the purpose of waste heat recovery and utilization. The cooled heat transfer oil flows back to the jacket 7 to continue absorbing heat, forming a cycle. The pressure relief pipe in the device can release pressure in time when the gas pressure in the energy storage tank 3 is too high, preventing overpressure from causing safety accidents. The one-way valve can ensure that the gas flows in one direction in the piston cylinder 5, ensuring stable gas transmission.

Claims

1. A device for recovering and utilizing waste heat from a phosphorus trichloride reaction, characterized in that, Includes a base (1), on which a reaction vessel (2) and an energy storage box (3) are fixedly installed. The reaction vessel (2) is located to the left of the energy storage box (3). A functional box (4) is fixedly installed on the top of the reaction vessel (2). The same piston cylinder (5) is fixedly installed on the top of the energy storage box (3) and the right side of the functional box (4). A motor (401) is fixedly installed on the inner wall of the top of the functional box (4). A stirring mechanism is provided inside the reaction vessel (2). A material injection pipe (201) is provided on the left side of the reaction vessel (2). A jacket (7) is provided on the outside of the reaction vessel (2). An oil injection pipe (701) is provided on the left side of the jacket (7). The same fixing plate (6) is fixedly installed on the top inner wall and bottom inner wall of the functional box (4). The fixing plate (6) is located on the right side of the motor (401). A reciprocating mechanism is provided between the fixing plate (6) and the functional box (4). A piston mechanism is provided inside the piston cylinder (5). An energy conversion mechanism is provided between the energy storage box (3) and the jacket (7). A water inlet pipe (301) and a drain pipe (302) are provided on the right side of the energy storage box (3). The water inlet pipe (301) is located above the drain pipe (302).

2. The waste heat recovery and utilization device for phosphorus trichloride reaction according to claim 1, characterized in that: The stirring mechanism includes a stirring shaft (402) and a stirring rod (403). The stirring shaft (402) is fixedly installed on the output shaft of the motor (401). The bottom end of the stirring shaft (402) extends into the reactor (2). The stirring rod (403) is provided on the stirring shaft (402) and is located inside the reactor (2).

3. The waste heat recovery and utilization device for phosphorus trichloride reaction according to claim 1, characterized in that: The reciprocating mechanism includes a reciprocating lead screw (601) and a lead screw seat (602). The reciprocating lead screw (601) is rotatably installed on the inner wall of the right side of the functional box (4). The left end of the reciprocating lead screw (601) extends to the left side of the fixed plate (6). The lead screw seat (602) is threaded on the reciprocating lead screw (601). The lead screw seat (602) is located on the right side of the reciprocating lead screw (601). A gear mechanism is provided between the reciprocating lead screw (601) and the stirring shaft (402).

4. The waste heat recovery and utilization device for phosphorus trichloride reaction according to claim 3, characterized in that: The gear mechanism includes two bevel gears (603). The left end of the reciprocating screw (601) and the stirring shaft (402) are both fixedly fitted with bevel gears (603). The bevel gears (603) are located in the function box (4), and the two bevel gears (603) mesh with each other.

5. The waste heat recovery and utilization device for phosphorus trichloride reaction according to claim 1, characterized in that: The piston mechanism includes a piston plate (501) and a piston rod (502). The piston plate (501) is slidably installed inside the piston cylinder (5). The piston rod (502) is fixedly installed on the left side of the piston plate (501). The left end of the piston rod (502) is fixedly connected to the right side of the lead screw seat (602).

6. The waste heat recovery and utilization device for phosphorus trichloride reaction according to claim 1, characterized in that: The piston cylinder (5) is provided with an exhaust pipe (503) at the bottom, the bottom end of which extends into the energy storage box (3). The piston cylinder (5) is provided with a vent pipe (504) at the top, and both the vent pipe (504) and the exhaust pipe (503) are located on the right side of the piston plate (501).

7. The waste heat recovery and utilization device for phosphorus trichloride reaction according to claim 6, characterized in that: Both the exhaust pipe (503) and the vent pipe (504) are equipped with one-way valves.

8. The waste heat recovery and utilization device for phosphorus trichloride reaction according to claim 1, characterized in that: The energy transducer includes a circulating pump (8), an oil extraction pipe (801), and a heat pipe (802). The circulating pump (8) is located on the left side of the energy storage tank (3). The circulating pump (8) and the jacket (7) are connected by the same oil extraction pipe (801). The heat pipe (802) is located inside the energy storage tank (3). One end of the heat pipe (802) is fixedly connected to the circulating pump (8), and the other end of the heat pipe (802) is fixedly connected to the jacket (7).

9. The waste heat recovery and utilization device for phosphorus trichloride reaction according to claim 3, characterized in that: The same slide rod is fixedly installed on the right side of the fixed plate (6) and the inner wall of the right side of the function box (4). The slide rod is located above the reciprocating screw (601), and the screw seat (602) is slidably sleeved on the slide rod.

10. The waste heat recovery and utilization device for phosphorus trichloride reaction according to claim 1, characterized in that: The energy storage box (3) is equipped with a pressure relief pipe on its top, which is located behind the piston cylinder (5).

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