R227 reaction heat recovery and heat supply integrated device of tubular heat exchanger

Abstract

The R227 reaction heat recovery and heat supply integrated device comprises an R227 reaction kettle, a reflux inlet is formed in the upper half section of the outer surface of the R227 reaction kettle, a circulating pipe is connected in the reflux inlet, a discharging port is formed in the center of the lower surface of the R227 reaction kettle, the shell-and-tube heat exchanger is arranged at the lower end of the R227 reaction kettle, and the shell-and-tube heat exchanger is arranged in the shell-and-tube heat exchanger. The middle section of the discharge port is detachably provided with a filter assembly, and the lower half section of the discharge port is provided with a temperature control valve. According to the enhanced heat exchange structure, the tube pass spiral flow guide groove and the shell pass spiral baffle plate enable the heat exchange efficiency to be improved, scaling is reduced, the R227 reaction kettle is directly connected with the heat exchanger, a middle buffer tank is omitted, heat loss is reduced, the structure is compact, and the heat exchanger can be used without too many complex pipelines.

Description

Technical Field

[0001] This utility model belongs to the technical field of energy-saving equipment for chemical production, specifically relating to an integrated device for R227 reaction heat recovery and heating of a shell-and-tube heat exchanger. Background Technology

[0002] R227, as a fluorinated refrigerant, typically releases a large amount of heat during its synthesis. In traditional processes, the reaction heat is directly discharged through cooling water, resulting in energy waste. Simultaneously, other processes in the plant, such as distillation and preheating, require additional steam heating, leading to high energy consumption. Furthermore, the reaction heat recovery and heating systems are independent, resulting in redundant equipment and complex piping. Utility Model Content

[0003] The purpose of this invention is to provide an integrated device for R227 reaction heat recovery and heating of a shell-and-tube heat exchanger, so as to solve the technical problems of direct discharge resource waste and complex independent system piping in existing equipment.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An integrated device for R227 reaction heat recovery and heating of a shell-and-tube heat exchanger includes an R227 reactor. The upper half of the outer surface of the R227 reactor is provided with a reflux port, and a circulation pipe is connected inside the reflux port. The center of the lower surface of the R227 reactor is provided with a discharge port. A shell-and-tube heat exchanger is provided at the lower end of the R227 reactor. A filter assembly is detachably installed in the middle section of the discharge port, and a temperature control valve is installed in the lower half section of the discharge port.

[0006] The shell-and-tube heat exchanger has tube boxes at both ends, and tube sheets are installed inside the tube boxes. One end of the upper surface of the tube box has a tube-side inlet, and the outlet is connected to the tube-side inlet. The shell-and-tube heat exchanger has a shell side, which contains multiple sets of tube bundles. The tube sheet has multiple sets of through holes aligned with the tube bundles. The high-temperature medium flowing out of the outlet can flow into the tube bundles through the tube sheet in the tube box. The shell side is the annular space between the shell and the tube bundles of the shell-and-tube heat exchanger.

[0007] The tube bundle consists of multiple tubes, with both ends of the tubes fixed to the tube sheet by welding to form the tube side. Each set of tubes has a spiral guide groove on its inner wall and a spiral baffle in the shell side, which is arranged around the tube bundle.

[0008] As a further embodiment of this utility model, the lower surface of the other set of pipe boxes is provided with a pipe outlet, one end of the lower surface of the pipe outlet is connected to the inlet of the circulation pump, and the outlet of the circulation pump is connected to a circulation pipe.

[0009] As a further embodiment of this utility model, the upper surface of the shell-and-tube heat exchanger is provided with a shell-side outlet at one end, and the lower surface of the shell-and-tube heat exchanger is provided with a shell-side inlet at one end. The shell-side inlet is used to input the heating medium, and both the shell-side outlet and the shell-side inlet are connected to the shell side.

[0010] As a further embodiment of this utility model, a safety valve is provided at the other end of the upper surface of the shell and tube heat exchanger, a drain valve is provided at the other end of the lower surface of the shell and tube heat exchanger, and a temperature sensor and a pressure sensor are installed on the pipe at the shell outlet.

[0011] As a further embodiment of this utility model, the temperature sensor can be a PT100 type, and the pressure sensor can be a piezoresistive type.

[0012] As a further embodiment of this utility model, the filter assembly includes a first flange, which is provided in two sets. The two sets of first flanges are respectively welded to one end of the lower surface of the outlet and one end of the upper surface of the tube inlet. A second flange is bolted to one end of each of the two sets of first flanges, and a filter cylinder is fixedly installed between the two sets of second flanges.

[0013] As a further embodiment of this utility model, external connecting cylinders are provided on both sides of the filter cylinder. One set of external connecting cylinders extends into the filter cylinder and can be inserted from the external connecting cylinder extending into the filter cylinder to the inner wall surface of the other set of external connecting cylinders. A connecting plate is detachably installed on one end of the outer surface of the external connecting cylinder by bolts.

[0014] Compared with the prior art, the R227 reaction heat recovery and heating integrated device of the present invention has the following advantages: the device has an overall enhanced heat exchange structure, the spiral guide grooves in the tube side and the spiral baffles in the shell side can improve the heat exchange efficiency and reduce scaling, and the R227 reactor is directly connected to the heat exchanger, eliminating the need for an intermediate buffer tank, reducing heat loss, and the structure is compact and can be used without too many complicated pipelines. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the circulation pipe in an embodiment of the present invention;

[0018] Figure 3This is a schematic cross-sectional view of the shell-and-tube heat exchanger in an embodiment of the present invention. Figure 1 ;

[0019] Figure 4 This is a schematic cross-sectional view of the shell-and-tube heat exchanger in an embodiment of the present invention. Figure 2 ;

[0020] Figure 5 This is a schematic diagram of the temperature sensor in an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of the filter assembly in an embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the filter cartridge in an embodiment of the present invention.

[0023] Figure label:

[0024] 1. R227 reactor; 101. Discharge port; 102. Reflux port; 103. Temperature control valve;

[0025] 2. Circulating pump; 201. Circulating pipe;

[0026] 3. Shell and tube heat exchanger; 31. Shell-side outlet; 32. Shell-side inlet; 301. Tube-side inlet; 302. Tube-side outlet; 303. Spiral baffle; 304. Tube bundle; 305. Spiral guide channel; 306. Tube box; 307. Tube sheet;

[0027] 4. Safety valve; 5. Drain valve;

[0028] 6. Filter assembly; 601. First flange; 602. Filter cartridge; 603. Second flange; 604. Filter; 605. Connecting plate; 606. External sleeve;

[0029] 7. Temperature sensor; 71. Pressure sensor. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0031] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0032] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0033] See appendix Figures 1-7 As shown in the figure, an embodiment of the present invention provides an integrated device for R227 reaction heat recovery and heating of a shell-and-tube heat exchanger, including an R227 reactor 1. The upper half of the outer surface of the R227 reactor 1 is provided with a reflux port 102, and a circulation pipe 201 is connected inside the reflux port 102. The center of the lower surface of the R227 reactor 1 is provided with a discharge port 101. A shell-and-tube heat exchanger 3 is provided at the lower end of the R227 reactor 1. A filter assembly 6 is detachably installed in the middle section of the discharge port 101, and a temperature control valve 103 is installed in the lower half of the discharge port 101.

[0034] The shell and tube heat exchanger 3 has tube boxes 306 at both ends, and tube sheets 307 are provided inside the tube boxes 306. One end of the upper surface of the tube box 306 has a tube inlet 301, and the outlet 101 is connected to the tube inlet 301. The shell and tube heat exchanger 3 has a shell side, and multiple sets of tube bundles 304 are provided inside the shell and tube sheet 307. Multiple sets of through holes are provided inside the tube bundles 304. The high-temperature medium flowing out of the outlet 101 can flow into the tube bundles 304 through the tube sheet 307 in the tube box 306. The shell side is the annular space between the shell of the shell and tube bundles 304.

[0035] The tube bundle 304 is composed of multiple tubes. The two ends of the tubes are fixed to the tube sheet 307 by welding to form the tube side. Each set of tubes has a spiral guide groove 305 on its inner wall and a spiral baffle 303 in the shell side. The spiral baffle 303 is arranged around the tube bundle 304.

[0036] Another set of tube boxes 306 has a tube-side outlet 302 on its lower surface. One end of the lower surface of the tube-side outlet 302 is connected to the inlet of the circulating pump 2, and the outlet of the circulating pump 2 is connected to the circulating pipe 201. One end of the upper surface of the shell-and-tube heat exchanger 3 has a shell-side outlet 31, and one end of the lower surface of the shell-and-tube heat exchanger 3 has a shell-side inlet 32. The shell-side inlet 32 ​​is used to input the heating medium, and both the shell-side outlet 31 and the shell-side inlet 32 ​​are connected to the shell side. The other end of the upper surface of the shell-and-tube heat exchanger 3 has a safety valve 4, and the other end of the lower surface of the shell-and-tube heat exchanger 3 has a drain valve 5. A temperature sensor 7 and a pressure sensor 71 are installed on the pipe of the shell-side outlet 31. The temperature sensor 7 can be a PT100 type, and the pressure sensor 71 can be a piezoresistive type.

[0037] The inlet and outlet of the circulating pump 2 in the above technical solution are respectively connected to the tube outlet 302 and the return port 102 of the R227 reactor 1. The medium can be driven to circulate through the circulating pipe 201, thereby ensuring the circulation of the medium in the R227 reactor 1, making the reaction process more stable, and also helping to improve the efficiency of reaction heat recovery, realizing the integration of reaction heat recovery and heating, and facilitating the use of an integrated device for R227 reaction heat recovery and heating of a shell and tube heat exchanger.

[0038] When the high-temperature medium is discharged from the outlet 101, it is filtered by the filter assembly 6 to ensure the purity of the material entering the subsequent equipment, avoid clogging of the spiral guide groove 305, and facilitate disassembly and replacement without disassembling the pipeline. Then, the flow rate of the outflowing medium can be adjusted by the temperature control valve 103 according to the set temperature to control the temperature of the medium entering the tube heat exchanger 3, realizing intelligent control. After temperature control, the high-temperature medium enters the tube side inlet 301 of the tube heat exchanger 3 from the outlet 101, flows into the tube bundle 304 through the tube sheet 307 in the tube box 306, and the tube bundle 304 is composed of multiple tubes. The two ends of the tubes are welded to the tube sheet 307 to form the tube side, and the inner wall of the tubes is provided with spiral guide grooves 305 to guide the medium to flow in the tubes and increase the medium's flow in the tubes. The heat transfer is enhanced by turbulence. The heating medium then enters the shell side from the shell-side inlet 32 ​​at one end of the lower surface of the tube heat exchanger 3. The shell side is equipped with spiral baffles 303 arranged around the tube bundle 304, which makes the heating medium flow along a spiral path in the shell side, increasing the contact area and time with the tube bundle 304 and improving the heat exchange efficiency. In the shell side, the heating medium absorbs the heat from the high-temperature medium in the tube bundle 304, and flows out from the shell-side outlet 31 after being heated, realizing the recovery and utilization of the reaction heat. The temperature and pressure of the heating medium at the shell-side outlet 31 can be monitored in real time by temperature sensor 7 and pressure sensor 71 installed at the shell-side outlet 31, and the flow rate of the reaction medium can be adjusted to match the heating load, so as to monitor and adjust the equipment operation status, thereby achieving efficient heat exchange and energy saving.

[0039] To further improve the safety and maintenance capabilities of the heat exchanger, a safety valve 4 is provided at the other end of the upper surface of the shell and tube heat exchanger 3. When the internal pressure of the equipment exceeds the set value, the safety valve 4 will automatically open to release pressure and ensure the safety of the equipment. Afterwards, a drain valve 5 is provided at the other end of the lower surface of the shell and tube heat exchanger 3 to periodically discharge impurities and dirt in the shell side, so as to detect abnormalities in time and facilitate operators to take corresponding measures for adjustment and maintenance.

[0040] See appendix Figures 6 to 7 As shown, the filter assembly 6 includes a first flange 601, of which two sets are provided. The two sets of first flanges 601 are respectively welded to one end of the lower surface of the outlet 101 and one end of the upper surface of the tube inlet 301. A second flange 603 is bolted to one end of each set of first flanges 601. A filter cylinder 602 is fixedly installed between the two sets of second flanges 603. External cylinders 606 are provided on both sides of the filter cylinder 602. One set of external cylinders 606 penetrates into the filter cylinder 602 and can insert the filter 604 from the external cylinder 606 penetrating into the filter cylinder 602 to the inner wall surface of the other set of external cylinders 606. A connecting plate 605 is detachably installed on one end of the outer surface of the external cylinder 606 by bolts.

[0041] To improve the filtration capacity of the device, the material flowing out of the outlet 101 first passes through the filter assembly 6, which consists of a first flange 601, a second flange 603, and a filter cylinder 602. When the material passes through the filter cylinder 602, solid particles and impurities are intercepted by the filter 604, ensuring the purity of the material entering the subsequent equipment and preventing blockage of the tubes. Furthermore, when cleaning or purifying the filter 604, it is not necessary to disassemble the entire structure. Simply unscrew the bolts on the connecting plate 605 mounted on the surface of the outer cylinder 606 and remove the filter 604 inserted into the outer cylinder 606, thereby ensuring the normal operation and heat exchange efficiency of the equipment.

[0042] The R227 synthesis reaction is carried out in R227 reactor 1, generating a high-temperature reaction liquid of 120-180°C. This high-temperature reaction liquid flows out from the outlet 101 of R227 reactor 1. After the flow rate is regulated by temperature control valve 103, it enters the filter assembly 6 to remove solid impurities. The filtered reaction liquid then enters the tube bundle 304 of the shell-and-tube heat exchanger 3 through the tube-side inlet 301. Under the action of the spiral guide channel 305, it rotates and flows, releasing heat. The cooled reaction liquid flows out from the tube-side outlet 302 and, after being pressurized by the circulating pump 2, returns to R227. 27. The reflux port 102 of the reactor forms a closed loop. Then, the heating medium enters the lower end of the heat exchanger from the shell inlet 32. Under the guidance of the spiral baffle 303, the medium spirals upward, absorbing the heat released from the tube side. The heated medium flows out from the shell outlet 31 and is transported to the plant heating network or the preheating section of the distillation tower. The high-temperature medium in the tube side flows from top to bottom, and the low-temperature medium in the shell side flows from bottom to top, forming a maximum temperature difference that can improve heat exchange efficiency, thereby achieving high-efficiency heat exchange and energy saving, intelligent control and stability.

[0043] In summary, this embodiment of the invention features an overall enhanced heat exchange structure. The tube-side spiral guide channel 305 and the shell-side spiral baffle 303 improve heat exchange efficiency and reduce scaling. Furthermore, the R227 reactor 1 is directly connected to the heat exchanger, eliminating the need for an intermediate buffer tank, reducing heat loss. The structure is compact and requires minimal complex piping for immediate use. Temperature sensor 7 monitors the temperature of the heating medium in real time, and triggers the temperature control valve 103 to adjust the flow rate of the reaction medium, achieving intelligent control and effectively matching the reaction heat with the heating demand. It can be connected to the plant's hot water network or preheated in a distillation tower to achieve graded utilization of waste heat.

[0044] The above description illustrates the basic principles of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The above embodiments and descriptions in the specification are only for illustrating the principles of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A R227 reaction heat recovery and heat supply integrated device of a shell-and-tube heat exchanger, comprising a R227 reaction kettle (1), characterized in that: The R227 reactor (1) is provided with a reflux port (102) on the upper half of the outer surface, a circulating pipe (201) is connected in the reflux port (102), a discharge port (101) is arranged in the center of the lower surface of the R227 reactor (1), a tube heat exchanger (3) is arranged at the lower end of the R227 reactor (1), a filter assembly (6) is detachably arranged in the middle section of the discharge port (101), and a temperature control valve (103) is arranged in the lower half section of the discharge port (101). The tube heat exchanger (3) is provided with a tube box (306) at both ends, the tube box (306) is provided with a tube plate (307) therein, the upper surface of the tube box (306) is provided with a tube inlet (301) at one end, the discharge port (101) is connected with the tube inlet (301), the tube heat exchanger (3) is provided with a shell side, the tube heat exchanger (3) is provided with a plurality of tube bundles (304), the tube plate (307) is provided with a plurality of through holes aligned with the tube bundles (304), the high-temperature medium flowing out of the discharge port (101) can flow into the tube bundle (304) through the tube plate (307) arranged in the tube box (306), and the shell side is an annular space between the shell of the tube heat exchanger (3) and the tube bundle (304).

2. The R227 reaction heat recovery and heating integrated device of a shell-and-tube heat exchanger according to claim 1, characterized in that: The tube bundle (304) is composed of a plurality of tubes, the tubes are fixed to the tube plate (307) at both ends by welding to form a tube side, and the inner wall of each tube is provided with a spiral flow guide groove (305), the shell side is provided with a spiral baffle (303), and the spiral baffle (303) is arranged around the tube bundle (304).

3. The R227 reaction heat recovery and heating integrated device of a shell-and-tube heat exchanger according to claim 2, characterized in that: The lower surface of the other tube box (306) in the two groups is provided with a tube outlet (302), one end of the lower surface of the tube outlet (302) is connected with the water inlet of the circulating pump (2), and the water outlet of the circulating pump (2) is connected with the circulating pipe (201).

4. The R227 reaction heat recovery and heating integrated device of a shell-and-tube heat exchanger according to claim 3, characterized in that: The upper surface of the tube heat exchanger (3) is provided with a shell outlet (31) at one end, the lower surface of the tube heat exchanger (3) is provided with a shell inlet (32) at one end, the shell inlet (32) is used for inputting heating medium, and the shell outlet (31) and the shell inlet (32) are both communicated into the shell side.

5. The R227 reaction heat recovery and heating integrated device of a shell-and-tube heat exchanger according to claim 4, characterized in that: The upper surface of the tube heat exchanger (3) is provided with a safety valve (4) at the other end, the lower surface of the tube heat exchanger (3) is provided with a blowdown valve (5) at the other end, and a temperature sensor (7) and a pressure sensor (71) are arranged on the pipeline of the shell outlet (31).

6. The R227 reaction heat recovery and heating integrated device of a shell-and-tube heat exchanger according to claim 5, characterized in that: The filter assembly (6) comprises first flanges (601), the first flanges (601) are provided in two groups, the first flanges (601) are respectively welded to the lower surface of the discharge port (101) and the upper surface of one end of the tube inlet (301), the surfaces of the two groups of first flanges (601) are both connected with second flanges (603) at one end through bolts, and a filter cartridge (602) is fixedly arranged between the two groups of second flanges (603).

7. The R227 reaction heat recovery and heating integrated device of a shell-and-tube heat exchanger according to claim 6, characterized in that: The filter cartridge (602) is provided with two outer connecting tubes (606) on both sides, one of the two groups of outer connecting tubes (606) penetrates into the filter cartridge (602), and the filter (604) is inserted into the inner wall surface of the other group of outer connecting tubes (606) from the outer connecting tube (606) in the filter cartridge (602), and the outer surface of the outer connecting tube (606) is provided with a connecting plate (605) at one end through bolt dismounting.

Images