Waste heat utilization device for lithium bromide water chiller

Abstract

The utility model discloses a waste heat utilization device for a lithium bromide water chiller, which belongs to the technical field of waste heat utilization and comprises a heat exchanger shell and a descaling component, one end of the top of the heat exchanger shell is fixedly connected with a water inlet pipe, and the other end of the bottom of the heat exchanger shell is fixedly connected with a water outlet pipe. Two sets of heat exchange pipes which are symmetrically distributed up and down are fixedly connected to the interior of the heat exchanger shell, the descaling assembly comprises a screw rod rotationally installed in the heat exchanger shell, a descaling disc in threaded connection with the screw rod and a motor used for driving the screw rod to rotate, and the descaling disc is arranged in the heat exchanger shell; a scraping ring is fixedly connected to the outer circumference of the descaling disc, a plurality of round holes matched with the heat exchange tubes are formed in the surface of the descaling disc, and scraping sleeves are fixedly connected to the inner walls of the round holes; and through the arrangement of the descaling assembly, after the device works for a period of time, dirt in the heat exchanger can be cleaned, and the heat exchange efficiency of the heat exchanger is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat utilization technology, specifically relating to a waste heat utilization device for a lithium bromide chiller. Background Technology

[0002] A lithium bromide absorption chiller is an energy-saving refrigeration device that uses steam, hot water, fuel oil, natural gas, and various waste heat sources to produce chilled or hot / cold water. The lithium bromide absorption chiller uses lithium bromide and an aqueous solution as the working fluid pair, with water as the refrigerant and the lithium bromide solution as the absorbent. The main component of the lithium bromide absorption chiller for waste heat utilization is a shell-and-tube heat exchanger.

[0003] Shell-and-tube heat exchangers, also known as tubular heat exchangers, are indirect heat exchangers that use the walls of tube bundles enclosed in a shell as the heat transfer surface.

[0004] When lithium bromide absorption chillers use shell-and-tube heat exchangers for heat exchange, the circulating water usually contains impurities. After long-term use, this can easily lead to fouling on the inner wall of the shell and the outer wall of the heat exchange pipes, which will affect the heat exchange efficiency of the heat exchanger. Utility Model Content

[0005] The purpose of this invention is to provide a waste heat recovery device for lithium bromide chillers, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a waste heat utilization device for a lithium bromide chiller, comprising a heat exchanger shell and a descaling assembly, wherein a water inlet pipe is fixedly connected to one end of the top of the heat exchanger shell, a water outlet pipe is fixedly connected to the other end of the bottom of the heat exchanger shell, two sets of heat exchange tubes symmetrically distributed vertically are fixedly connected inside the heat exchanger shell, and end caps are fixedly installed at both ends of the heat exchanger shell.

[0007] The descaling assembly includes a screw rotatably installed inside the heat exchanger housing, a descaling disc threadedly connected to the screw, and a motor for driving the screw to rotate. The motor is fixedly installed on the outer wall of one of the end caps. The descaling disc is disposed inside the heat exchanger housing. A scraper ring is fixedly connected to the outer circumference of the descaling disc. The surface of the descaling disc has several circular holes adapted to the heat exchange tubes. A scraper sleeve is fixedly connected to the inner wall of the circular holes.

[0008] In one preferred embodiment, a medium inlet and a medium outlet are respectively provided at the top and bottom of one of the end caps, and a partition is fixedly connected to the middle of the interior of the end cap with the medium inlet.

[0009] In a preferred embodiment, a filter screen is fixedly installed inside the water inlet pipe.

[0010] In a preferred embodiment, a nut adapted to the screw is fixedly connected to the center of the descaling disc.

[0011] In a preferred embodiment, both the scraper ring and the scraper sleeve are made of silicone.

[0012] In a preferred embodiment, a drain outlet is provided at the bottom of the heat exchanger shell away from the outlet pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This waste heat recovery device for lithium bromide chillers, through the setting of descaling components, can start the motor to drive the screw to rotate after the device has been working for a period of time. The screw drives the descaling disc to slide horizontally inside the heat exchanger shell. The scraping ring on the outer circumference of the descaling disc scrapes off the dirt on the inner wall of the heat exchanger shell, and the scraping sleeve in the round hole scrapes off the dirt on the surface of the heat exchange tube, thereby cleaning the dirt inside the heat exchanger and ensuring the heat exchange efficiency of the heat exchanger.

[0015] This waste heat recovery device for lithium bromide chillers filters the water in the inlet pipe through a filter screen, reducing impurities entering the heat exchanger housing and thus helping to reduce the operating frequency of the descaling components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the descaling disc of this utility model.

[0019] In the diagram: 1. Heat exchanger shell; 11. Inlet pipe; 12. Outlet pipe; 13. Heat exchanger tube; 14. End cap; 15. Medium inlet; 16. Medium outlet; 17. Baffle plate; 18. Filter screen; 19. Drain outlet; 2. Descaling assembly; 21. Screw; 22. Descaling disc; 23. Motor; 24. Scraper ring; 25. Round hole; 26. Scraper sleeve; 27. Nut. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments.

[0021] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0022] Please see Figure 1-3 This utility model provides a waste heat utilization device for a lithium bromide chiller, including a heat exchanger shell 1 and a descaling assembly 2. A water inlet pipe 11 is fixedly connected to one end of the top of the heat exchanger shell 1, and a water outlet pipe 12 is fixedly connected to the other end of the bottom of the heat exchanger shell 1. Two sets of symmetrically distributed heat exchange tubes 13 are fixedly connected inside the heat exchanger shell 1. End caps 14 are fixedly installed at both ends of the heat exchanger shell 1. One end cap 14 has a medium inlet 15 at its top and a medium outlet 16 at its bottom. A partition 17 is fixedly connected to the middle of the interior of the end cap 14 with the medium inlet 15. Through the heat exchange... In the setup of the heat exchanger, when the lithium bromide absorption chiller utilizes waste heat, the heat exchange medium can be added into one of the end caps 14 from the medium inlet 15, and the circulating hot water can be added into the heat exchanger shell 1 from the inlet pipe 11. After passing through one of the end caps 14, the heat exchange medium enters the upper set of heat exchange tubes 13, and after passing through the upper set of heat exchange tubes 13, it enters the other end cap 14, and then returns to the original end cap 14 from the lower set of heat exchange tubes 13. Finally, it is discharged from the medium outlet 16. The heat exchange medium and the circulating hot water exchange heat through the heat exchange tubes 13, thereby recovering and utilizing the waste heat of the heat exchange medium.

[0023] Specifically, the descaling assembly 2 includes a screw 21 rotatably mounted inside the heat exchanger housing 1, a descaling disc 22 threadedly connected to the screw 21, and a motor 23 for driving the screw 21 to rotate. The motor 23 is fixedly mounted on the outer wall of one of the end caps 14. The screw 21 is arranged parallel to the heat exchange tube 13. The descaling disc 22 is disposed inside the heat exchanger housing 1. A scraper ring 24 is fixedly connected to the outer circumference of the descaling disc 22. Several circular holes 25 adapted to the heat exchange tube 13 are opened on the surface of the descaling disc 22. A scraper sleeve 26, a scraper ring 24, and a scraper are fixedly connected to the inner wall of the circular holes 25. All sleeves 26 are made of silicone. A nut 27 that matches the screw 21 is fixedly connected to the center of the descaling disc 22. With the descaling component 2, after the device has been working for a period of time, the motor 23 can be started to drive the screw 21 to rotate. The screw 21 drives the descaling disc 22 to slide horizontally inside the heat exchanger shell 1. The scraper ring 24 on the outer circumference of the descaling disc 22 scrapes off the dirt on the inner wall of the heat exchanger shell 1, and the scraper sleeve 26 in the round hole 25 scrapes off the dirt on the surface of the heat exchange tube 13. Thus, the dirt inside the heat exchanger can be cleaned to ensure the heat exchange efficiency of the heat exchanger.

[0024] The water inlet pipe 11 is equipped with a filter screen 18. The filter screen 18 can filter the water in the water inlet pipe 11, which can reduce the impurities entering the heat exchanger shell 1, thereby helping to reduce the working frequency of the descaling component 2.

[0025] The heat exchanger shell 1 has a drain port 19 at the bottom, away from the outlet pipe 12. When descaling the inside of the heat exchanger, the drain port 19 can be opened to allow the scraped-off dirt to be discharged from the drain port 19.

[0026] The working principle and usage process of this utility model are as follows: First, when utilizing waste heat in a lithium bromide absorption chiller, the heat exchange medium can be added into one of the end caps 14 through the medium inlet 15. The circulating hot water is added into the heat exchanger shell 1 through the inlet pipe 11. After passing through one of the end caps 14, the heat exchange medium enters the upper set of heat exchange tubes 13, then enters the other end cap 14, and finally returns to the original end cap 14 from the lower set of heat exchange tubes 13. Finally, it is discharged from the medium outlet 16. The heat exchange medium and the circulating hot water pass through the heat exchange tubes 1... 3. Heat exchange is performed, thereby recovering and utilizing the waste heat of the heat exchange medium. After the device has been working for a period of time, the drain port 19 can be opened, and then the motor 23 can be started to drive the screw 21 to rotate. The screw 21 drives the descaling disc 22 to slide horizontally inside the heat exchanger shell 1. The scraping ring 24 on the outer circumference of the descaling disc 22 scrapes off the dirt on the inner wall of the heat exchanger shell 1, and the scraping sleeve 26 in the round hole 25 scrapes off the dirt on the surface of the heat exchange tube 13. The scraped dirt is discharged from the drain port 19, thereby cleaning the dirt inside the heat exchanger and ensuring the heat exchange efficiency of the heat exchanger.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for a lithium bromide chiller, comprising a heat exchanger housing (1) and a descaling assembly (2), characterized in that: One end of the top of the heat exchanger shell (1) is fixedly connected to a water inlet pipe (11), and the other end of the bottom of the heat exchanger shell (1) is fixedly connected to a water outlet pipe (12). Two sets of heat exchange tubes (13) are fixedly connected inside the heat exchanger shell (1) and are symmetrically distributed vertically. Both ends of the heat exchanger shell (1) are fixedly installed with end caps (14). The descaling assembly (2) includes a screw (21) rotatably installed inside the heat exchanger housing (1), a descaling disc (22) threadedly connected to the screw (21), and a motor (23) for driving the screw (21) to rotate. The motor (23) is fixedly installed on the outer wall of one of the end caps (14). The descaling disc (22) is located inside the heat exchanger housing (1). A scraper ring (24) is fixedly connected to the outer circumference of the descaling disc (22). A plurality of round holes (25) adapted to the heat exchange tube (13) are opened on the surface of the descaling disc (22). A scraper sleeve (26) is fixedly connected to the inner wall of the round hole (25).

2. The waste heat recovery device for a lithium bromide chiller according to claim 1, characterized in that: One of the end caps (14) is provided with a medium inlet (15) at the top and a medium outlet (16) at the bottom, and a partition (17) is fixedly connected to the middle of the interior of the end cap (14) with the medium inlet (15).

3. The waste heat recovery device for a lithium bromide chiller according to claim 1, characterized in that: A filter screen (18) is fixedly installed inside the water inlet pipe (11).

4. The waste heat recovery device for a lithium bromide chiller according to claim 1, characterized in that: A nut (27) that matches the screw (21) is fixedly connected to the center of the descaling disc (22).

5. A waste heat recovery device for a lithium bromide chiller according to claim 1, characterized in that: Both the scraper ring (24) and the scraper sleeve (26) are made of silicone.

6. The waste heat recovery device for a lithium bromide chiller according to claim 1, characterized in that: A drain port (19) is provided at the bottom of the heat exchanger shell (1) away from the water outlet pipe (12).

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