Phenylphosphinic acid synthesis waste heat recovery device

Abstract

The utility model relates to the technical field of chemical production especially is a kind of phenyl hypophosphorous acid synthesis waste heat recovery device, it not only can collect and store the heat generated in the reaction process and the heat generated in high-temperature flue gas, reduce heat loss, but also can use stored hot water to preheat equipment, save the next reaction initial heating trouble;Including reaction mechanism;Still including cooling mechanism, heat storage mechanism, filtering mechanism and heat exchange mechanism, cooling mechanism is installed on reaction mechanism and transports cooling water, heat storage mechanism is installed on cooling mechanism and stores hot water, filtering mechanism is installed on heat storage mechanism and filters flue gas, heat exchange mechanism is installed on heat storage mechanism and facilitates flue gas to further heat hot water.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical production, and in particular to a waste heat recovery device for phenylphosphine synthesis. Background Technology

[0002] Phenylenephosphonic acid and its salts are important flame retardant intermediates. Their mainstream synthesis process usually involves the oxidation or hydrolysis of phenylphosphine or related raw materials at high temperatures. The reaction process is violent and releases a large amount of heat.

[0003] Existing waste heat recovery devices, such as the waste heat recovery device for methanol synthesis disclosed in utility model patent application number 202323244091.7, mainly include a base plate, a waste heat recovery mechanism on the top of the base plate, a base, a bottom fixedly connected to the top of the base plate, and a waste heat chamber fixedly connected to the top of the base. In use, the exhaust funnel and the waste heat chamber are first connected by a second bolt and a second fixing ring. Then, the air inlet pipe and the flange are connected by a first bolt. Waste heat enters the waste heat chamber through the air inlet pipe for heat recovery. Finally, the heat insulation plate is manually removed, and the cooled heat is discharged into the air through the exhaust pipe.

[0004] However, the oxidation or hydrolysis of phosphine or related raw materials at high temperatures is a violent reaction process that releases a large amount of heat. Most of this released heat and the exhaust gas are not effectively utilized, resulting in heat waste. Moreover, the synthesis of phenylphosphine acid requires a high-temperature environment in the early stages, and most existing reactors need to be heated separately, which consumes a lot of energy. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a waste heat recovery device for phenylphosphine synthesis that can not only collect and store the heat generated during the reaction process and the heat generated in the high-temperature flue gas, reducing heat loss, but also use the stored hot water to preheat the equipment, eliminating the trouble of heating at the beginning of the next reaction.

[0006] This utility model discloses a waste heat recovery device for phenylphosphine synthesis, comprising a reaction mechanism; it also includes a cooling mechanism, a heat storage mechanism, a filtration mechanism, and a heat exchange mechanism. The cooling mechanism is installed on the reaction mechanism and supplies cooling water; the heat storage mechanism is installed on the cooling mechanism and stores hot water; the filtration mechanism is installed on the heat storage mechanism and filters flue gas; and the heat exchange mechanism is installed on the heat storage mechanism and facilitates further heating of the hot water by the flue gas. Heat is generated during the reaction within the reaction mechanism. The cooling mechanism supplies cooling water to the reaction mechanism to absorb the reaction heat, while the hot water is stored in the heat storage mechanism. Simultaneously, the high-temperature flue gas generated within the reaction mechanism is filtered by the filtration mechanism and then enters the heat exchange mechanism, where it further exchanges heat with the hot water before being discharged. In the initial stage of the next reaction, the hot water in the heat storage mechanism is supplied to the reaction mechanism through the cooling mechanism to preheat the equipment.

[0007] Preferably, the reaction mechanism includes a base, a reaction vessel, a coil, an insulation layer, and a controller. The base is placed on the ground, the bottom of the reaction vessel is connected to the top of the base, the coil is installed on the outside of the reaction vessel, the insulation layer is installed on the outside of the coil, and the controller is installed on the insulation layer. The materials react in the reaction vessel, and the reaction process is controlled by the controller. A large amount of heat is generated during the reaction, and the cooling mechanism delivers cooling water to the coil to absorb the excess heat generated by the reaction.

[0008] Preferably, the cooling mechanism includes a water pump, an inlet pipe, a first control valve, and a delivery pipe. The water pump is mounted on the base, the inlet pipe is connected to the water inlet of the water pump, the first control valve is mounted on the inlet pipe, and the delivery pipe is installed between the water outlet of the water pump and the water inlet of the coil. The inlet pipe is connected to a water source. When the first control valve is opened, the controller controls the water pump to start pumping water, and the water pump delivers cooling water to the coil through the delivery pipe.

[0009] Preferably, the heat storage mechanism includes a connecting pipe, a check valve, a heat storage tank, a drain pipe, a second control valve, a thermometer, and a level gauge. The connecting pipe is internally connected to the outlet of the coil. The check valve is installed on the connecting pipe. The heat storage tank is installed on the base and internally connected to the connecting pipe. The drain pipe is installed between the heat storage tank and the inlet pipe. The second control valve is installed on the drain pipe. The thermometer and the level gauge are installed on the heat storage tank. After absorbing heat, the cooling water in the coil enters the heat storage tank through the connecting pipe for storage. The thermometer detects the temperature inside the heat storage tank, and the level gauge detects the liquid level inside the heat storage tank. Before the next reaction begins, the second control valve is opened and the first control valve is closed. The water pump is started to pump water. The hot water in the heat storage tank enters the water pump through the drain pipe and the inlet pipe. The water pump delivers the hot water to the coil to preheat the reactor and increase the initial temperature required for the reaction.

[0010] Preferably, the filtration mechanism includes a first exhaust pipe, a pressure gauge, a filter box, multiple sets of filter plates, and a vent pipe. The first exhaust pipe is connected to the top of the reactor and the interior. The pressure gauge is installed on the first exhaust pipe. The filter box is installed on the connecting pipe and is connected to the interior of the first exhaust pipe. The multiple sets of filter plates are slidably installed on the filter box. The vent pipe is connected to the interior of the filter box. The high-temperature flue gas generated in the reactor enters the filter box through the first exhaust pipe. The multiple sets of filter plates filter the flue gas. The filtered flue gas enters the heat exchange mechanism through the vent pipe.

[0011] Preferably, multiple filter plates are equipped with pull rings, and the multiple filter plates are slidably inserted and installed on the filter box; when the pressure gauge detects an increase in pressure in the first exhaust pipe, it proves that multiple filter plates are blocked by impurities, and the staff can operate the pull rings in time to pull out the filter plates for cleaning and replacement, so as to ensure the filtration effect.

[0012] Preferably, the heat exchange mechanism includes a heat exchange tube, a purification box, and a second exhaust pipe. The heat exchange tube is installed inside the connecting pipe and communicates with the inside of the vent pipe. The purification box is installed on the connecting pipe and communicates with the inside of the heat exchange tube. The second exhaust pipe communicates with the inside of the purification box. The vent pipe delivers high-temperature flue gas to the heat exchange tube, where the heat exchange tube exchanges heat with the hot water in the connecting pipe to further heat the hot water. Afterward, the flue gas enters the purification box for purification and is discharged through the second exhaust pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the reaction generates heat in the reaction mechanism, the cooling mechanism delivers cooling water to the reaction mechanism to absorb the reaction heat, the hot water is delivered to the heat storage mechanism for storage, and at the same time the high-temperature flue gas generated in the reaction mechanism is filtered by the filtration mechanism and enters the heat exchange mechanism. The flue gas and hot water are further exchanged for heat and then discharged. In the initial stage of the next reaction, the hot water in the heat storage mechanism is delivered to the reaction mechanism through the cooling mechanism to preheat the equipment. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a cross-sectional isometric structural diagram of the reaction mechanism of this utility model; Figure 3 This is a partially enlarged cross-sectional isometric structural schematic diagram of the cooling mechanism of this utility model; Figure 4 This is a partially enlarged front view schematic diagram of the thermal storage mechanism of this utility model; Figure 5 This is a partially enlarged isometric structural diagram of the filtration mechanism of this utility model; Figure 6 This is a partially enlarged cross-sectional isometric structural diagram of the heat exchange mechanism of this utility model.

[0015] The attached diagram is labeled as follows: 01, reaction mechanism; 11, base; 12, reaction vessel; 13, coil; 14, insulation layer; 15, controller; 02, cooling mechanism; 21, water pump; 22, water inlet pipe; 23, first control valve; 24, water supply pipe; 03, heat storage mechanism; 31, connecting pipe; 32, check valve; 33, heat storage tank; 34, drain pipe; 35, second control valve; 36, thermometer; 37, level gauge; 04, filtration mechanism; 41, first exhaust pipe; 42, pressure gauge; 43, filter box; 44, filter plate; 45, vent pipe; 05, heat exchange mechanism; 51, heat exchange tube; 52, purification box; 53, second exhaust pipe. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example

[0017] This utility model discloses a waste heat recovery device for phenylphosphine synthesis, comprising a reaction mechanism 01; it also includes a cooling mechanism 02, a heat storage mechanism 03, a filtration mechanism 04, and a heat exchange mechanism 05. The cooling mechanism 02 is installed on the reaction mechanism 01 and supplies cooling water; the heat storage mechanism 03 is installed on the cooling mechanism 02 and stores the hot water; the filtration mechanism 04 is installed on the heat storage mechanism 03 and filters the flue gas; the heat exchange mechanism 05 is installed on the heat storage mechanism 03 and facilitates further heating of the hot water by the flue gas. The reaction mechanism 01 includes a base 11. The reactor 12, coil 13, insulation layer 14, and controller 15 are mounted on a base 11 placed on the ground. The bottom of the reactor 12 is connected to the top of the base 11. The coil 13 is installed on the outside of the reactor 12, and the insulation layer 14 is installed on the outside of the coil 13. The controller 15 is installed on the insulation layer 14. The cooling mechanism 02 includes a water pump 21, an inlet pipe 22, a first control valve 23, and a water supply pipe 24. The water pump 21 is installed on the base 11, and the inlet pipe 22 is connected to the inlet of the water pump 21. The first control valve 23 is installed on the inlet pipe 24. 2. The water supply pipe 24 is installed between the outlet of the water pump 21 and the inlet of the coil 13; the heat storage mechanism 03 includes a connecting pipe 31, a check valve 32, a heat storage tank 33, a drain pipe 34, a second control valve 35, a thermometer 36, and a level gauge 37. The connecting pipe 31 is connected to the inside of the outlet of the coil 13. The check valve 32 is installed on the connecting pipe 31. The heat storage tank 33 is installed on the base 11 and is connected to the inside of the connecting pipe 31. The drain pipe 34 is connected and installed between the heat storage tank 33 and the inlet pipe 22. The second control valve 35 is installed on the drain pipe 24. On pipe 34, thermometer 36 is installed on heat storage tank 33, and level gauge 37 is installed on heat storage tank 33; the filtration mechanism 04 includes a first exhaust pipe 41, pressure gauge 42, filter box 43, multiple sets of filter plates 44 and vent pipe 45. The first exhaust pipe 41 is connected to the top of the reactor 12. Pressure gauge 42 is installed on the first exhaust pipe 41. Filter box 43 is installed on connecting pipe 31 and is connected to the inside of the first exhaust pipe 41. Multiple sets of filter plates 44 are slidably installed on filter box 43. Vent pipe 45 is connected to the inside of filter box 43.During operation, the materials first react in the reactor 12. The reaction process is controlled by the controller 15. A large amount of heat is generated during the reaction. The water inlet pipe 22 is connected to a water source. When the first control valve 23 is opened, the controller 15 controls the water pump 21 to start pumping water. The water pump 21 delivers cooling water to the coil 13 through the water delivery pipe 24 to absorb the excess heat generated by the reaction. After absorbing heat, the cooling water in the coil 13 enters the heat storage tank 33 through the connecting pipe 31 for storage. The thermometer 36 detects the temperature in the heat storage tank 33, and the level gauge 37 detects the liquid level in the heat storage tank 33. The high-temperature flue gas generated in the reactor 12 enters the filter box 43 through the first exhaust pipe 41. Multiple filter plates 44 filter the flue gas. The filtered flue gas then enters the heat exchange mechanism 05 through the vent pipe 45, reheating the hot water in the connecting pipe 31. Before the next reaction begins, the second control valve 35 is opened and the first control valve 23 is closed. The water pump 21 is started to pump water. The hot water in the heat storage tank 33 enters the water pump 21 through the drain pipe 34 and the inlet pipe 22. The water pump 21 delivers the hot water to the coil 13 to preheat the reactor 12, increasing the initial temperature required for the reaction. Example

[0018] like Figures 1 to 6As shown, the waste heat recovery device for phenylphosphine synthesis of this utility model, based on Example 1, further includes multiple sets of filter plates 44, each equipped with a pull ring, which are slidably inserted and installed on the filter box 43; the heat exchange mechanism 05 includes a heat exchange tube 51, a purification box 52, and a second exhaust pipe 53. The heat exchange tube 51 is installed inside the connecting pipe 31 and communicates with the inside of the vent pipe 45. The purification box 52 is installed inside the connecting pipe 31 and communicates with the inside of the heat exchange tube 51. The second exhaust pipe 53 communicates with the inside of the purification box 52. The system is connected to the reactor. During operation, the materials first react in the reactor 12. The reaction process is controlled by the controller 15. A large amount of heat is generated during the reaction. The water inlet pipe 22 is connected to a water source. The first control valve 23 is opened, and the controller 15 controls the start of the water pump 21 to draw water. The water pump 21 delivers cooling water through the water delivery pipe 24 to the coil 13 to absorb the excess heat generated by the reaction. After absorbing heat, the cooling water in the coil 13 enters the heat storage tank 33 through the connecting pipe 31 for storage. The thermometer 36 monitors the heat storage tank 33. The internal temperature is monitored, and the liquid level gauge 37 monitors the liquid level in the heat storage tank 33. The high-temperature flue gas generated in the reactor 12 enters the filter box 43 through the first exhaust pipe 41. Multiple filter plates 44 filter the flue gas. When the pressure gauge 42 detects an increase in pressure in the first exhaust pipe 41, it indicates that multiple filter plates 44 are blocked by impurities. The staff can promptly operate the pull ring to remove the filter plates 44 for cleaning and replacement to ensure the filtration effect. The filtered flue gas enters the heat exchange tube through the vent pipe 45. Inside 51, heat exchange tube 51 exchanges heat with the hot water in connecting pipe 31, further heating the hot water. Then, the flue gas enters the purification box 52 for purification and is discharged through the second exhaust pipe 53. Before the next reaction begins, the second control valve 35 is opened and the first control valve 23 is closed. The water pump 21 is started to pump water. The hot water in the heat storage tank 33 enters the water pump 21 through the drain pipe 34 and the inlet pipe 22. The water pump 21 delivers the hot water to the coil 13 to preheat the reactor 12 and increase the initial temperature required for the reaction.

[0019] The water pump 21 of this utility model is purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0020] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A waste heat recovery device for phenylphosphine synthesis, comprising a reaction mechanism (01); characterized in that, It also includes a cooling mechanism (02), a heat storage mechanism (03), a filtration mechanism (04), and a heat exchange mechanism (05). The cooling mechanism (02) is installed on the reaction mechanism (01) and supplies cooling water. The heat storage mechanism (03) is installed on the cooling mechanism (02) and stores hot water. The filtration mechanism (04) is installed on the heat storage mechanism (03) and filters the flue gas. The heat exchange mechanism (05) is installed on the heat storage mechanism (03) and facilitates further heating of the hot water by the flue gas.

2. The waste heat recovery device for phenylphosphine synthesis as described in claim 1, characterized in that, The reaction mechanism (01) includes a base (11), a reaction vessel (12), a coil (13), an insulation layer (14), and a controller (15). The base (11) is placed on the ground, the bottom of the reaction vessel (12) is connected to the top of the base (11), the coil (13) is installed on the outside of the reaction vessel (12), the insulation layer (14) is installed on the outside of the coil (13), and the controller (15) is installed on the insulation layer (14).

3. The waste heat recovery device for phenylphosphine synthesis as described in claim 2, characterized in that, The cooling mechanism (02) includes a water pump (21), an inlet pipe (22), a first control valve (23), and a water delivery pipe (24). The water pump (21) is mounted on the base (11). The inlet pipe (22) is connected to the inlet of the water pump (21). The first control valve (23) is mounted on the inlet pipe (22). The water delivery pipe (24) is installed between the outlet of the water pump (21) and the inlet of the coil (13).

4. The waste heat recovery device for phenylphosphine synthesis as described in claim 3, characterized in that, The heat storage mechanism (03) includes a connecting pipe (31), a check valve (32), a heat storage tank (33), a drain pipe (34), a second control valve (35), a thermometer (36), and a level gauge (37). The connecting pipe (31) is connected to the inside of the outlet of the coil (13). The check valve (32) is installed on the connecting pipe (31). The heat storage tank (33) is installed on the base (11) and connected to the inside of the connecting pipe (31). The drain pipe (34) is connected and installed between the heat storage tank (33) and the inlet pipe (22). The second control valve (35) is installed on the drain pipe (34). The thermometer (36) is installed on the heat storage tank (33). The level gauge (37) is installed on the heat storage tank (33).

5. The waste heat recovery device for phenylphosphine synthesis as described in claim 4, characterized in that, The filtration mechanism (04) includes a first exhaust pipe (41), a pressure gauge (42), a filter box (43), multiple sets of filter plates (44), and a vent pipe (45). The first exhaust pipe (41) is connected to the top of the reactor (12). The pressure gauge (42) is installed on the first exhaust pipe (41). The filter box (43) is installed on the connecting pipe (31) and is connected to the inside of the first exhaust pipe (41). Multiple sets of filter plates (44) are slidably installed on the filter box (43). The vent pipe (45) is connected to the inside of the filter box (43).

6. The waste heat recovery device for phenylphosphine synthesis as described in claim 5, characterized in that, It also includes multiple sets of filter plates (44) each equipped with pull rings, and multiple sets of filter plates (44) are slidably inserted and installed on the filter box (43).

7. The waste heat recovery device for phenylphosphine synthesis as described in claim 5, characterized in that, The heat exchange mechanism (05) includes a heat exchange tube (51), a purification box (52), and a second exhaust pipe (53). The heat exchange tube (51) is installed inside the connecting pipe (31) and connected to the inside of the ventilation pipe (45). The purification box (52) is installed on the connecting pipe (31) and connected to the inside of the heat exchange tube (51). The second exhaust pipe (53) is connected to the inside of the purification box (52).

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