Lithium bromide absorption refrigeration waste heat recovery system

Abstract

The utility model discloses a lithium bromide absorption refrigeration waste heat recovery system, which relates to the technical field of lithium bromide waste heat recovery, and comprises a generator, one side of the generator is fixedly connected with a low-concentration solution leading-in pipe, the upper surface of the generator is fixedly connected with an evaporation pipe, and the evaporation pipe is fixedly connected with an evaporator. And the bottom of the generator is fixedly connected with a waste gas leading-in pipe and a waste gas leading-out pipe. Low-concentration lithium bromide solution flows into the generator through the low-concentration solution leading-in pipe and exchanges heat with high-temperature waste gas led into the communicating pipe through the waste gas leading-in pipe, the waste gas after heat exchange is exhausted through the waste gas leading-out pipe, the temperature of the exhausted waste gas is monitored in real time through the temperature sensor, and when the monitored temperature is high, the low-concentration lithium bromide solution flows into the generator through the low-concentration solution leading-in pipe. And when the low-concentration lithium bromide solution is heated and evaporated, the valve IV can be closed, and the exhausted waste gas is guided into the waste gas guide-in pipe through the high-temperature guide pipe and enters heat exchange circulation again, so that the heat recovery rate is improved, and the problem of energy waste is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium bromide waste heat recovery technical field, specifically related to a lithium bromide absorption refrigeration's waste heat recovery system. BACKGROUND

[0002] In the lithium bromide refrigeration process, first need to heat low concentration lithium bromide solution through gas, make water heat absorption evaporation. At present stage in industrial production, often will produce a large amount of high-temperature waste gas, if direct emission or direct utilization to high-temperature waste gas, will lead to a large amount of heat loss, cause energy waste. Therefore in lithium bromide refrigeration system, high-temperature waste gas is often used for the evaporation process of low concentration lithium bromide solution in generator, recovers a certain amount of heat energy, saves energy.

[0003] At present, only through the simple heat exchange of high-temperature waste gas and low concentration lithium bromide solution, the heat recovery efficiency is low. When the waste temperature is lower than a certain temperature, water cannot be evaporated or the heat exchange efficiency is low, but the waste gas still carries a large amount of heat, if the waste gas is discharged or treated subsequently, a large amount of heat will be wasted. Therefore, the present application provides a lithium bromide absorption refrigeration waste heat recovery system to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model provides a lithium bromide absorption refrigeration waste heat recovery system to solve the problems in the background art.

[0005] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0006] A lithium bromide absorption refrigeration waste heat recovery system, comprising a generator, a low concentration solution inlet pipe is fixedly connected to one side of the generator, an evaporation pipe is fixedly connected to the upper surface of the generator, a waste gas inlet pipe and a waste gas outlet pipe are fixedly connected to the bottom of the generator, and the portions of the waste gas inlet pipe and the waste gas outlet pipe inside the generator are communicated through a communication pipe.

[0007] A temperature sensor is fixedly connected to the outer surface of the waste gas outlet pipe near the generator, which is used to monitor the temperature of the waste gas discharged from the waste gas outlet pipe, and a valve four is fixedly connected to the outer surface of the waste gas outlet pipe.

[0008] A high-temperature pipe is fixedly connected to the outer surface of the waste gas outlet pipe, and the high-temperature pipe is communicated with the waste gas inlet pipe.

[0009] The further improvement of the utility model technical scheme lies in that the outer surface of the waste gas leading-out pipe is fixedly connected with a medium-temperature pipe, one end of the medium-temperature pipe is fixedly connected with a heat exchange sleeve, the heat exchange sleeve is sleeved on the outer surface of the low-concentration solution leading-in pipe, the top end of the heat exchange sleeve is fixedly connected with a heat exchange leading-out pipe, one end of the heat exchange leading-out pipe is fixedly connected with the outer surface of the waste gas leading-out pipe, and the outer surfaces of the medium-temperature pipe and the heat exchange leading-out pipe are respectively fixedly connected with valve two and valve three.

[0010] The further improvement of the utility model technical scheme lies in that the outer surface of the high-temperature pipe is fixedly connected with valve one.

[0011] The further improvement of the utility model technical scheme lies in that the communicating pipe is in the shape of spiral disc so as to increase the heat exchange time of the waste gas and the low-concentration lithium bromide solution.

[0012] The further improvement of the utility model technical scheme lies in that the inside of the generator is movably connected with a push plate, the push plate can reciprocatingly move inside the generator, and the low-concentration lithium bromide solution inside the generator is stirred and mixed.

[0013] The further improvement of the utility model technical scheme lies in that the push plate is movably connected with a transmission rod and a limiting slide rod, the two ends of the transmission rod and the limiting slide rod are movably connected with the inner wall of the generator, and the push plate reciprocatingly moves along the transmission rod and the limiting slide rod.

[0014] The further improvement of the utility model technical scheme lies in that the transmission rod and the push plate are threadedly connected, and the outer surface of the connecting position of the push plate and the transmission rod is provided with a thread matched with the outer surface of the transmission rod.

[0015] The further improvement of the utility model technical scheme lies in that the outside of the generator is fixedly connected with a driving motor, and the output shaft of the driving motor is fixedly connected with one end of the transmission rod.

[0016] Thanks to the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0017] 1、The utility model provides a kind of waste heat recovery system of lithium bromide absorption refrigeration, low-concentration lithium bromide solution is flowed into generator by low-concentration solution leading-in pipe, and high-temperature waste gas in communicating pipe is introduced by waste gas leading-in pipe and carries out heat exchange, and the water in low-concentration lithium bromide solution evaporates and is introduced into next process by evaporation pipe, and the waste gas after heat exchange is discharged by waste gas leading-out pipe, and the discharged waste gas is monitored in real time by temperature sensor, when monitoring temperature is higher, low-concentration lithium bromide solution can still be heated, so that it is heated and evaporated, then valve four can be closed, and the discharged waste gas is introduced into waste gas leading-in pipe by high-temperature pipe, to re-enter heat exchange cycle, to improve heat recovery rate, to avoid the problem of energy waste.

[0018] 2, the utility model provides a lithium bromide absorption refrigeration's waste heat recovery system, when temperature sensor monitored waste gas temperature can not heat low concentration lithium bromine solution, make it heat evaporation, but carry more heat, can not direct discharge, then close valve one, valve four, and open valve two and valve three, make waste gas pass through medium temperature guide pipe and enter into heat exchange sleeve, preheat treatment to the low concentration lithium bromine solution that flows, reduce the heat that needs to absorb in the generator evaporation, the waste gas after heat exchange treatment flows out through heat exchange lead out pipe, and discharges through waste gas lead out pipe, when temperature sensor monitored waste gas temperature is low, can direct discharge, then close valve one, valve two, valve three, open valve four, make waste gas can direct discharge through waste gas lead out pipe, above different temperature to the exhaust gas, adopt different heat recovery measures, thereby reach the grading treatment waste gas, fully recover the heat that waste gas carries, avoid the problem of energy waste. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is structure schematic view of the utility model;

[0020] Figure 2 It is structure schematic view of another angle of the utility model;

[0021] Figure 3 It is cross section structure schematic view of the utility model;

[0022] Figure 4 It is cross section structure schematic view of another angle of the generator of the utility model.

[0023] In the drawing: 1, generator;2, low concentration solution lead-in pipe;3, evaporation pipe;4, waste gas lead-in pipe;5, waste gas lead-out pipe;6, communication pipe;7, temperature sensor;8, high temperature guide pipe;9, valve one;10, medium temperature guide pipe;11, valve two;12, heat exchange sleeve;13, heat exchange lead-out pipe;14, valve three;15, valve four;16, transmission rod;17, push plate;18, drive motor;19, limit slide bar. DETAILED DESCRIPTION

[0024] The utility model will be further explained in detail in connection with examples:

[0025] Example 1:

[0026] As Figures 1-4 The utility model provides a lithium bromide absorption refrigeration's waste heat recovery system, including generator 1, the low concentration solution lead-in pipe 2 of one side fixed connection of generator 1, the upper surface fixed connection of generator 1 has evaporation pipe 3, the bottom fixed connection of generator 1 has waste gas lead-in pipe 4 and waste gas lead-out pipe 5, the part in the generator 1 of waste gas lead-in pipe 4, waste gas lead-out pipe 5 is communicated through communication pipe 6.

[0027] The temperature sensor 7 is fixedly connected to the outer surface of the exhaust gas leading-out pipe 5 near the generator 1, for monitoring the temperature of the exhaust gas discharged by the exhaust gas leading-out pipe 5, and a valve four 15 is fixedly connected to the outer surface of the exhaust gas leading-out pipe 5.

[0028] A high-temperature pipe 8 is fixedly connected to the outer surface of the exhaust gas leading-out pipe 5, and the high-temperature pipe 8 is in communication with the exhaust gas leading-in pipe 4.

[0029] The low-concentration lithium bromide solution flows into the generator 1 through the low-concentration solution leading-in pipe 2, and exchanges heat with the high-temperature exhaust gas in the communication pipe 6 led in through the exhaust gas leading-in pipe 4, and the water in the low-concentration lithium bromide solution evaporates and is led into the next process through the evaporation pipe 3, and the heat-exchanged exhaust gas is discharged through the exhaust gas leading-out pipe 5, and the discharged exhaust gas is monitored in real time by the temperature sensor 7, and when the monitored temperature is high and can still heat the low-concentration lithium bromide solution to evaporate it, the valve four 15 can be closed, and the discharged exhaust gas is led into the exhaust gas leading-in pipe 4 through the high-temperature pipe 8 to re-enter the heat exchange cycle, so as to improve the heat recovery rate and avoid the problem of energy waste.

[0030] Further, the valve one 9 is fixedly connected to the outer surface of the high-temperature pipe 8, and through the action of the valve one 9, it can be controlled whether the exhaust gas flows out through the high-temperature pipe 8, and when the exhaust temperature cannot heat the low-concentration lithium bromide solution to evaporate it, the valve one 9 is closed, so that it is led into the next process through the exhaust gas leading-out pipe 5.

[0031] Further, the communication pipe 6 is in the shape of a spiral disc, so as to increase the heat exchange time of the exhaust gas and the low-concentration lithium bromide solution and improve the heat exchange efficiency of the high-temperature exhaust gas.

[0032] Further, the outer surface of the waste gas leading-out pipe 5 is fixedly connected with a medium-temperature pipe 10, one end of the medium-temperature pipe 10 is fixedly connected with a heat exchange sleeve 12, the heat exchange sleeve 12 is sleeved on the outer surface of the low-concentration solution leading-in pipe 2, the top end of the heat exchange sleeve 12 is fixedly connected with a heat exchange leading-out pipe 13, one end of the heat exchange leading-out pipe 13 is fixedly connected with the outer surface of the waste gas leading-out pipe 5, the outer surfaces of the medium-temperature pipe 10 and the heat exchange leading-out pipe 13 are respectively fixedly connected with a valve two 11 and a valve three 14, when the temperature monitored by the temperature sensor 7 cannot heat the low-concentration lithium bromide solution to make it evaporate under heating, but the waste gas carries too much heat to be directly discharged, then the valve one 9 and the valve four 15 are closed, and the valve two 11 and the valve three 14 are opened, so that the waste gas flows into the heat exchange sleeve 12 through the medium-temperature pipe 10, and the low-concentration lithium bromide solution flowing in is preheated to reduce the heat absorbed in the evaporation of the generator 1, the waste gas after heat exchange treatment flows out through the heat exchange leading-out pipe 13 and is discharged through the waste gas leading-out pipe 5, when the temperature monitored by the temperature sensor 7 is low and the waste gas can be directly discharged, then the valve one 9, the valve two 11 and the valve three 14 are closed, and the valve four 15 is opened, so that the waste gas can be directly discharged through the waste gas leading-out pipe 5, different heat recovery measures are taken according to different temperatures of the discharged waste gas, so that the waste gas is treated in stages, the heat carried by the waste gas is fully recovered, and the problem of energy waste is avoided.

[0033] Further, the inside of the generator 1 is movably connected with a push plate 17, the push plate 17 can reciprocate in the inside of the generator 1, because the low-concentration lithium bromide solution near the communication pipe 6 has a higher temperature, when the push plate 17 moves, the low-concentration lithium bromide solution in the generator 1 is disturbed, the low-concentration lithium bromide solutions with different temperatures are stirred and mixed, and the overall heat exchange effect is improved.

[0034] Further, the push plate 17 is movably connected with a transmission rod 16 and a limiting slide rod 19, the two ends of the transmission rod 16 and the limiting slide rod 19 are movably connected with the inner wall of the generator 1, the push plate 17 reciprocates along the transmission rod 16 and the limiting slide rod 19, and the push plate 17 slides along the transmission rod 16 and the limiting slide rod 19 to regularly disturb the low-concentration lithium bromide solution.

[0035] Further, the transmission rod 16 is threadedly connected with the push plate 17, the outer surface of the connection between the push plate 17 and the transmission rod 16 is provided with a thread matched with the outer surface of the transmission rod 16, when the transmission rod 16 rotates, the push plate 17 can reciprocate along the transmission rod 16.

[0036] Further, the outside of the generator 1 is fixedly connected with a driving motor 18, the output shaft of the driving motor 18 is fixedly connected with one end of the transmission rod 16, and the driving motor 18 can drive the rotation of the transmission rod 16.

[0037] The following is a detailed description of the working principle of the waste heat recovery system of the lithium bromide absorption refrigeration.

[0038] like Figures 1-4 As shown, the low-concentration lithium bromide solution flows into the generator 1 through the low-concentration solution inlet pipe 2, and exchanges heat with the high-temperature exhaust gas introduced into the connecting pipe 6 through the exhaust gas inlet pipe 4. The water in the low-concentration lithium bromide solution evaporates and is introduced into the next process through the evaporation pipe 3. The exhaust gas after heat exchange is discharged through the exhaust gas outlet pipe 5. The temperature of the exhausted exhaust gas is monitored in real time by the temperature sensor 7. When the monitored temperature is high and can still heat the low-concentration lithium bromide solution to make it evaporated by heat, the valve 14 15 can be closed, and the exhausted exhaust gas can be introduced into the exhaust gas inlet pipe 4 through the high-temperature conduit 8 to re-enter the heat exchange cycle. When the exhaust gas temperature monitored by the temperature sensor 7 is not able to heat the low-concentration lithium bromide solution to make it evaporated by heat, but it carries too much heat and cannot be discharged directly, the valve 15 can be closed. Close valve one 9 and valve four 15, and open valve two 11 and valve three 14, so that the exhaust gas passes into the heat exchange sleeve 12 through the medium-temperature conduit 10, and preheats the low-concentration lithium bromide solution flowing in to reduce the heat required to be absorbed for evaporation in the generator 1. The exhaust gas after heat exchange treatment flows out through the heat exchange outlet pipe 13 and is discharged through the exhaust gas outlet pipe 5. When the exhaust gas temperature monitored by the temperature sensor 7 is low and can be discharged directly, close valve one 9, valve two 11, valve three 14, and open valve four 15, so that the exhaust gas can be discharged directly through the exhaust gas outlet pipe 5. Different heat recovery measures are taken according to the different temperatures of the exhaust gas, so as to achieve graded treatment of the exhaust gas, fully recover the heat carried by the exhaust gas, and avoid energy waste.

Claims

1. A lithium bromide absorption refrigeration waste heat recovery system, comprising a generator (1), one side of the generator (1) is fixedly connected with a low-concentration solution introduction pipe (2), and the upper surface of the generator (1) is fixedly connected with an evaporation pipe (3), characterized in that: The bottom of the generator (1) is fixedly connected with a waste gas introduction pipe (4) and a waste gas export pipe (5), and the parts of the waste gas introduction pipe (4) and the waste gas export pipe (5) located inside the generator (1) are communicated through a communication pipe (6); A temperature sensor (7) is fixedly connected to the outer surface of the waste gas export pipe (5) near the generator (1), for monitoring the temperature of the waste gas exported by the waste gas export pipe (5), and a valve four (15) is fixedly connected to the outer surface of the waste gas export pipe (5); A high-temperature guide pipe (8) is fixedly connected to the outer surface of the waste gas export pipe (5), and the high-temperature guide pipe (8) communicates with the waste gas introduction pipe (4).

2. The lithium bromide absorption refrigeration waste heat recovery system of claim 1, wherein: A medium-temperature guide pipe (10) is fixedly connected to the outer surface of the waste gas export pipe (5), one end of the medium-temperature guide pipe (10) is fixedly connected with a heat exchange sleeve (12), the heat exchange sleeve (12) is sleeved on the outer surface of the low-concentration solution introduction pipe (2), the top end of the heat exchange sleeve (12) is fixedly connected with a heat exchange export pipe (13), one end of the heat exchange export pipe (13) is fixedly connected with the outer surface of the waste gas export pipe (5), and the outer surfaces of the medium-temperature guide pipe (10) and the heat exchange export pipe (13) are respectively fixedly connected with a valve two (11) and a valve three (14).

3. The lithium bromide absorption refrigeration waste heat recovery system of claim 1, wherein: A valve one (9) is fixedly connected to the outer surface of the high-temperature guide pipe (8).

4. The lithium bromide absorption refrigeration waste heat recovery system of claim 1, wherein: The communication pipe (6) is in the shape of a spiral disc, so as to increase the heat exchange time of the waste gas and the low-concentration lithium bromide solution.

5. The lithium bromide absorption refrigeration waste heat recovery system of claim 1, wherein: A push plate (17) is movably connected inside the generator (1), the push plate (17) can reciprocally move inside the generator (1) to stir and mix the low-concentration lithium bromide solution inside the generator (1).

6. The lithium bromide absorption refrigeration waste heat recovery system of claim 5, wherein: The push plate (17) is movably connected with a transmission rod (16) and a limiting slide rod (19), both ends of the transmission rod (16) and the limiting slide rod (19) are movably connected with the inner wall of the generator (1), and the push plate (17) reciprocally moves along the transmission rod (16) and the limiting slide rod (19).

7. The lithium bromide absorption refrigeration waste heat recovery system of claim 6, wherein: The transmission rod (16) and the push plate (17) are threadedly connected, and the outer surface of the connection between the push plate (17) and the transmission rod (16) is provided with a thread matched with the outer surface of the transmission rod (16).

8. The lithium bromide absorption refrigeration waste heat recovery system of claim 7, wherein: An external drive motor (18) is fixedly connected to the generator (1), and the output shaft of the drive motor (18) is fixedly connected with one end of the transmission rod (16).

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