An integrated device for high-efficiency heat recovery of condensate

Abstract

The utility model relates to the field of condensate recovery, and discloses an integrated device for efficient heat energy recovery of condensate, comprising a tank body and a heat exchange body, wherein an exhaust port is provided on the top of the tank body, a drain pipe is provided on the bottom of the tank body, a condensation plate is provided in the tank body, the heat exchange body horizontally penetrates the tank body, a water seal pipe is provided at one end of the drain pipe away from the tank body, both ends of the water seal pipe are communicated with the drain pipe, a drain valve is provided on the drain pipe, a water inlet pipe and a water outlet pipe are provided on one side of the water seal pipe close to the heat exchange body, one end of the water inlet pipe is communicated with the heat exchange body, and the other end is communicated with the drain pipe, a switching valve is also provided on the drain pipe, one end of the water outlet pipe is communicated with the heat exchange body, and the other end is communicated with the middle part of the water seal pipe, a water inlet valve is provided on the water inlet pipe, and a water outlet valve is provided on the water outlet pipe. The utility model can realize the function of cooling, reducing and discharging condensate of a chemical device, and can also recover the heat energy of condensate, and the heat energy recovery efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of condensate recovery, in particular to an integrated device for high-efficiency heat energy recovery of condensate. Background Art

[0002] In the chemical industry, the composition of condensate produced by chemical plants is relatively complex, and the condensate recovery equipment is relatively complex. After the condensate flashes in the closed recovery tank, the medium in the closed recovery tank is steam condensate, and the temperature is about 120°C. Therefore, the condensate pump is very prone to cavitation during the transportation process, resulting in low operating efficiency, high noise, increased pump vibration, and frequent equipment failures, which has become a major equipment hidden danger in the production of the device and seriously threatens the safe production of the device. For this reason, a device that can effectively cool and reduce the pressure of condensate is urgently needed to solve the existing problems. Utility Model Content

[0003] The utility model aims to provide an integrated device for efficiently recovering heat energy of condensate, aiming to solve the problem that the heat energy of condensate is difficult to recover at present.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A condensate high-efficiency heat energy recovery integrated device, characterized in that it comprises a tank body and a heat exchange body, the top of the tank body is provided with an exhaust port, the bottom of the tank body is provided with a drain pipe, a condensation plate is provided in the tank body, the projection of the condensation plate in the vertical direction covers the projection of the exhaust port in the vertical direction, a plurality of water inlets are provided on the tank body, the water inlets are located below the condensation plate, the heat exchange body horizontally penetrates the tank body, a water seal pipe is provided at one end of the drain pipe away from the tank body, both ends of the water seal pipe are connected to the drain pipe A drain valve is arranged on the drain pipe, and the drain valve is located between the two ends of the water seal pipe. A water inlet pipe and a water outlet pipe are arranged on the side of the water seal pipe close to the heat exchanger. One end of the water inlet pipe is communicated with the heat exchanger, and the other end is communicated with the drain pipe. A switching valve is also arranged on the drain pipe, and the switching valve is located between the water inlet pipe and the water seal pipe. One end of the water outlet pipe is communicated with the heat exchanger, and the other end is communicated with the middle part of the water seal pipe. A water inlet valve is arranged on the water inlet pipe, and a water outlet valve is arranged on the water outlet pipe.

[0006] Through the above technical scheme, when the equipment is working normally, the condensed water generated by the chemical device enters the tank body through the water inlet, and first undergoes a flash evaporation stage. The formed steam rises to the top of the tank body. After the steam hits the condensation plate, large-diameter droplets will condense on the condensation plate to form condensed water and fall back. The remaining steam will bypass the condensation plate and be discharged from the exhaust port; a part of the fallen condensed water drops onto the surface of the heat exchanger to form the first heat exchange, and then continues to flow to the bottom of the tank body and enters the drain pipe. At this time, the drain valve and the switching valve are closed at the same time, and the water inlet valve and the water outlet valve are opened at the same time. The condensed water enters the water inlet pipe through the drain pipe, and then enters the heat exchanger for the second heat exchange. The cooled condensed water flows out from the water outlet pipe into the water seal pipe, and then flows from the water seal pipe into the other end of the drain pipe for discharge.

[0007] When the heat exchanger is maintained and inspected, open the switching valve, close the water inlet valve, water outlet valve and drain valve, and the condensed water will directly enter the water seal pipe from the drain pipe, and then flow into the other end of the drain pipe and be discharged.

[0008] Through two heat exchanges, the condensate of the chemical plant can be discharged under reduced pressure and the heat energy of the condensate can be recovered. The heat recovery efficiency is high, thus saving energy. When the condensate temperature is reduced, the saturated vapor pressure is reduced, which reduces the cavitation damage to the equipment. At the same time, the tank body and the heat exchange body are integrated structures, occupying a small area and having a low cost. At the same time, when the heat exchange body is maintained and repaired, there is no need to stop the entire set of equipment, which reduces the maintenance cost.

[0009] It should be understood that the principle and structure of the flash evaporation stage of condensed water are common technologies in the art and will not be elaborated herein.

[0010] The utility model is further configured as follows: the heat exchange body includes a condensate tank and a desalted water tank, the condensate tank and the desalted water tank are detachably connected, the water inlet pipe and the water outlet pipe are both connected to the condensate tank, the desalted water tank is located outside the tank body, a heat exchange tube is arranged inside the heat exchange body, the desalted water tank includes a water inlet part and the water outlet part, the water inlet end of the heat exchange tube is connected to the water inlet part, and the water outlet end of the heat exchange tube is connected to the water outlet part.

[0011] Through the above technical scheme, condensed water enters the condensate water tank from the water inlet pipe, and low-temperature desalted water enters the heat exchange tube from the water inlet. After the heat exchange is completed in the condensate water tank, the heated desalted water enters the water outlet and is discharged, and the cooled condensed water is discharged from the water outlet pipe. The heat energy exchange is completed, and the desalted water tank can be removed to maintain the desalted water tank, heat exchange tube and condensate water tank, which is simple and convenient to operate.

[0012] The utility model is further configured as follows: the water inlet is located below the water outlet.

[0013] Through the above technical solution, low-temperature desalted water can fill the heat exchange tubes and then be discharged, and the heat exchange efficiency of the equipment is higher.

[0014] The utility model is further configured as follows: a heat insulation board is arranged between the water inlet and the water outlet.

[0015] Through the above technical solution, it is difficult for the low-temperature desalted water in the water inlet and the heated desalted water in the water outlet to exchange heat, thereby improving the heat exchange efficiency of the entire heat exchange body.

[0016] The utility model is further configured as follows: the condensate tank includes a first flange, the desalted water tank includes a second flange, the heat exchange tube includes a bundled tube plate, the bundled tube plate is located between the first flange and the second flange, and the first flange, the bundled tube plate and the second flange are connected in sequence by bolts.

[0017] Through the above technical solution, when the heat exchanger needs to be maintained, the bolts are removed, the first flange, the tube sheet and the second flange are separated, and after the desalted water tank is removed, the heat exchange tube inside the condensate tank can be taken out for maintenance. The operation is simple and convenient, reducing the difficulty and cost of subsequent maintenance.

[0018] The utility model is further configured as follows: a buffer plate is arranged in the condensate tank, and the buffer plate is close to the connection between the water inlet pipe and the condensate tank.

[0019] Through the above technical solution, condensed water directly impacts the buffer plate through the water inlet pipe, and then flows into the condensate tank, thereby reducing the impact of the incoming water on the heat exchange tube and extending the service life of the heat exchange tube.

[0020] The utility model is further configured as follows: a plurality of slow flow plates are vertically arranged in the condensate tank, and through holes are opened on the slow flow plates.

[0021] Through the above technical solution, after the condensed water enters the condensate tank, due to the obstruction of the slow flow plate, the water level of the condensed water gradually rises in the condensate tank, and then flows through the through hole to the entire condensate tank, increasing the contact area between the condensed water and the heat exchange tube, thereby improving the heat exchange efficiency.

[0022] The utility model is further configured as follows: the water seal pipe is configured in an inverted "U" shape.

[0023] Through the above technical solution, when condensed water is discharged, it always passes through the water seal pipe, and the water seal pipe is filled with liquid, so that the pressure in the whole equipment is kept stable, and the equipment operation is more stable.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] 1. The device occupies a small area and has a low construction cost by setting the tank body for condensate flash evaporation and the heat exchange body for heat exchange as an integrated structure.

[0026] 2. A part of the heat exchanger in this device is located inside the tank body. The condensed water droplets undergo a heat exchange on the heat exchanger, and the condensed water undergoes a second heat exchange after entering the heat exchanger. Through two heat exchanges, the condensed water of the chemical plant can be cooled, depressurized and discharged, and the heat energy of the condensed water can be recovered. The heat energy recovery efficiency is high, thereby saving energy. After the condensed water temperature is reduced, the saturated vapor pressure is reduced, and the cavitation damage to the equipment is smaller.

[0027] 3. When the heat exchanger in this device is maintained and overhauled, open the switching valve, close the water inlet valve, water outlet valve and drain valve, and the condensed water directly enters the water seal pipe from the drain pipe, and then flows into the other end of the drain pipe for discharge. At this time, the desalted water tank and heat exchange tube can be disassembled for maintenance without stopping the entire equipment. Moreover, the heat exchange tube is independently set and can be replaced at any time, which reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a structural schematic diagram of an embodiment of a condensate high-efficiency heat energy recovery integrated device of the utility model;

[0030] Figure 2 It is a structural schematic diagram of a heat exchanger in an embodiment of a condensate high-efficiency heat energy recovery integrated device of the utility model;

[0031] Figure 3 It is a structural schematic diagram of a condensate tank in one embodiment of a condensate high-efficiency heat energy recovery integrated device of the utility model.

[0032] In the figure, 1, tank body; 1a, exhaust port; 1b, condensation plate; 1c, water inlet; 2, heat exchange body; 2a, condensate tank; 2a1, first flange; 2a2, buffer plate; 2a3, slow flow plate; 2b, desalted water tank; 2b1, water inlet; 2b2, water outlet; 2b3, insulation board; 2b4, second flange; 2c, heat exchange tube; 2c1, bundled tube plate; 3, drain pipe; 3a, drain valve; 3b, switching valve; 4, water seal pipe; 5, water inlet pipe; 5a, water inlet valve; 6, water outlet pipe; 6a, water outlet valve. DETAILED DESCRIPTION

[0033] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The utility model provides a condensate high-efficiency heat energy recovery integrated device, such as Figure 1 As shown, it includes a tank body 1 and a heat exchange body 2, the top of the tank body 1 is provided with an exhaust port 1a, the bottom of the tank body 1 is provided with a drain pipe 3, a condensation plate 1b is provided inside the tank body 1, the projection of the condensation plate 1b in the vertical direction covers the projection of the exhaust port 1a in the vertical direction, a plurality of water inlets 1c are provided on the tank body 1, the water inlet 1c is located below the condensation plate 1b, the heat exchange body 2 horizontally penetrates the tank body 1, the heat exchange body 2 and the tank body 1 are connected by welding, a water seal pipe 4 is provided at one end of the drain pipe 3 away from the tank body 1, the water seal pipe 4 is provided in an inverted "U" shape, and both ends of the water seal pipe 4 are connected to The drain pipe 3 is interconnected, and a drain valve 3a is provided on the drain pipe 3, and the drain valve 3a is located between the two ends of the water seal pipe 4. A water inlet pipe 5 and a water outlet pipe 6 are provided on the side of the water seal pipe 4 close to the heat exchange body 2. One end of the water inlet pipe 5 is interconnected with the heat exchange body 2, and the other end is interconnected with the drain pipe 3. A switching valve 3b is also provided on the drain pipe 3, and the switching valve 3b is located between the water inlet pipe 5 and the water seal pipe 4. One end of the water outlet pipe 6 is interconnected with the heat exchange body 2, and the other end is interconnected with the middle part of the water seal pipe 4. A water inlet valve 5a is provided on the water inlet pipe 5, and a water outlet valve 6a is provided on the water outlet pipe 6.

[0035] like Figure 2As shown, the heat exchange body 2 includes a condensate tank 2a and a desalted water tank 2b, the condensate tank 2a and the desalted water tank 2b are detachably connected, the water inlet pipe 5 and the water outlet pipe 6 are both connected to the condensate tank 2a, the desalted water tank 2b is located outside the tank body 1, and a heat exchange tube 2c is arranged inside the heat exchange body 2, the condensate tank 2a includes a first flange 2a1, the desalted water tank 2b includes a second flange 2b4, and the heat exchange tube 2c includes a bundle tube plate 2c1, and the bundle tube plate 2c1 is located at the first Between the flange 2a1 and the second flange 2b4, the first flange 2a1, the bundle tube plate 2c1 and the second flange 2b4 are connected in sequence by bolts, the desalted water tank 2b includes a water inlet 2b1 and a water outlet 2b2, the water inlet 2b1 is located below the water outlet 2b2, an insulation board 2b3 is provided between the water inlet 2b1 and the water outlet 2b2, the water inlet end of the heat exchange tube 2c is communicated with the water inlet 2b1, and the water outlet end of the heat exchange tube 2c is communicated with the water outlet 2b2.

[0036] like Figure 3 As shown, a buffer plate 2a2 is arranged in the condensate tank 2a, and the buffer plate 2a2 is close to the connection between the water inlet pipe 5 and the condensate tank 2a. A plurality of slow flow plates 2a3 are also vertically arranged in the condensate tank 2a, and through holes are opened on the slow flow plates 2a3.

[0037] Through the above technical scheme, when the equipment is operating normally, the switching valve 3b and the drain valve 3a are closed, the water inlet valve 5a and the water outlet valve 6a are opened, and the condensed water enters the tank body 1 through the water inlet 1c, and first undergoes a flash evaporation stage, and the formed steam rises to the top of the tank body 1. After the steam hits the condensation plate 1b, large-diameter droplets will condense on the condensation plate 1b to form condensed water and fall back, and the remaining steam will bypass the condensation plate 1b and be discharged from the exhaust port 1a; a part of the fallen condensed water falls to the surface of the condensation water tank 2a, at which time the first heat exchange is formed, and then the condensed water continues to flow to the bottom of the tank body 1 and enters the drain pipe 3. At this time, the drain valve 3a and the switching valve 3b are closed at the same time, and the condensed water Water enters the water inlet pipe 5 through the drain pipe 3, and the condensed water hits the buffer plate 2a2 and then enters the condensed water tank. Due to the presence of the slow flow plate 2a3, the water level of the condensed water rises slowly, and then slowly injects into the entire condensed water tank through the through hole. At this time, the low-temperature desalted water enters the heat exchange tube 2c through the water inlet 2b1 of the desalted water tank 2b, and fills the heat exchange tube 2c from bottom to top, and performs a second heat exchange with the condensed water inside the condensed water tank 2a. The heated desalted water is discharged through the water outlet 2b2, and the cooled condensed water flows out of the water outlet pipe 6 and enters the water seal pipe 4, and then flows from the water seal pipe 4 to the other end of the drain pipe 3 and is discharged, completing the cooling and decompression of the condensed water. In the above working process, the condensed water is cooled and decompressed through two heat exchanges, and the heat exchange efficiency is higher. In addition, the tank body 1 and the heat exchange body 2 are an integrated structure, which occupies a small area.

[0038] When the equipment needs maintenance, close the water inlet valve 5a, the water outlet valve 6a and the drain valve 3a, open the switching valve 3b, and the condensed water directly enters the water seal pipe 4 from the drain pipe 3, and then is discharged from the other end of the drain pipe 3. At this time, the first flange 2a1 and the second flange 2b4 can be disassembled, the desalted water tank 2b can be removed, and the heat exchange tube 2c can be pulled out from the inside of the condensed water tank 2a to perform equipment maintenance. The desalted water tank 2b or the heat exchange tube 2c can be replaced separately. There is no need to stop the entire set of equipment for maintenance, and the repair and maintenance costs are lower.

[0039] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0040] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A condensate high-efficiency heat energy recovery integrated device, characterized in that: The invention comprises a tank body (1) and a heat exchange body (2), wherein an exhaust port (1a) is provided at the top of the tank body (1), a drain pipe (3) is provided at the bottom of the tank body (1), a condensation plate (1b) is provided inside the tank body (1), the projection of the condensation plate (1b) in the vertical direction covers the projection of the exhaust port (1a) in the vertical direction, a plurality of water inlets (1c) are provided on the tank body (1), the water inlets (1c) are located below the condensation plate (1b), the heat exchange body (2) passes through the tank body (1) horizontally, a water seal pipe (4) is provided at one end of the drain pipe (3) away from the tank body (1), both ends of the water seal pipe (4) are connected to the drain pipe (3), and the drain pipe (3) is provided with a A drain valve (3a) is provided, and the drain valve (3a) is located between the two ends of the water seal pipe (4); a water inlet pipe (5) and a water outlet pipe (6) are provided on the side of the water seal pipe (4) close to the heat exchange body (2); one end of the water inlet pipe (5) is communicated with the heat exchange body (2), and the other end is communicated with the drain pipe (3); a switching valve (3b) is also provided on the drain pipe (3); the switching valve (3b) is located between the water inlet pipe (5) and the water seal pipe (4); one end of the water outlet pipe (6) is communicated with the heat exchange body (2), and the other end is communicated with the middle part of the water seal pipe (4); the water inlet pipe (5) is provided with a water inlet valve (5a), and the water outlet pipe (6) is provided with a water outlet valve (6a).

2. The condensate high-efficiency heat energy recovery integrated device according to claim 1, characterized in that: The heat exchange body (2) comprises a condensate tank (2a) and a desalted water tank (2b), the condensate tank (2a) and the desalted water tank (2b) are detachably connected, the water inlet pipe (5) and the water outlet pipe (6) are both connected to the condensate tank (2a), the desalted water tank (2b) is located outside the tank body (1), a heat exchange tube (2c) is arranged inside the heat exchange body (2), the desalted water tank (2b) comprises a water inlet portion (2b1) and a water outlet portion (2b2), the water inlet end of the heat exchange tube (2c) is connected to the water inlet portion (2b1), and the water outlet end of the heat exchange tube (2c) is connected to the water outlet portion (2b2).

3. The condensate high-efficiency heat energy recovery integrated device according to claim 2 is characterized in that: The water inlet portion (2b1) is located below the water outlet portion (2b2).

4. The condensate high-efficiency heat energy recovery integrated device according to claim 3 is characterized in that: A heat insulation board (2b3) is provided between the water inlet (2b1) and the water outlet (2b2).

5. The condensate high-efficiency heat energy recovery integrated device according to claim 2, characterized in that: The condensate tank (2a) includes a first flange (2a1), the desalted water tank (2b) includes a second flange (2b4), the heat exchange tube (2c) includes a bundled tube plate (2c1), the bundled tube plate (2c1) is located between the first flange (2a1) and the second flange (2b4), and the first flange (2a1), the bundled tube plate (2c1) and the second flange (2b4) are connected in sequence by bolts.

6. The condensate high-efficiency heat energy recovery integrated device according to claim 2, characterized in that: A buffer plate (2a2) is provided in the condensed water tank (2a), and the buffer plate (2a2) is close to the connection between the water inlet pipe (5) and the condensed water tank (2a).

7. The condensate high-efficiency heat energy recovery integrated device according to claim 2, characterized in that: A plurality of slow flow plates (2a3) are also vertically arranged in the condensed water tank (2a), and through holes are provided on the slow flow plates (2a3).

8. The condensate high-efficiency heat energy recovery integrated device according to claim 1, characterized in that: The water seal pipe (4) is arranged in an inverted "U" shape.

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