A waste heat recovery device for lithium bromide generator exhaust gas

Abstract

This utility model relates to the technical field of lithium bromide generator sets and discloses a waste heat recovery device for the tail gas of a lithium bromide generator set. The device includes a heat exchanger body and an outlet pipe connected to the outside of the heat exchanger body. An inlet pipe is connected to the outside of the heat exchanger body, and a connecting pipe is connected to the end of the inlet pipe away from the heat exchanger body. A filter assembly is disposed inside the connecting pipe, including a filter screen body disposed inside the connecting pipe. A fixing plate is fixedly connected to the top of the filter screen body. A backflush pipe is disposed inside the connecting pipe, and a track is fixedly connected inside the connecting pipe. This utility model, by setting up the filter assembly, can filter and block droplets or aerosols in the tail gas of the lithium bromide generator set, preventing them from causing localized corrosion of the heat exchanger body.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium bromide generator sets, specifically to a waste heat recovery device for the tail gas of a lithium bromide generator set. Background Technology

[0002] Lithium bromide units include two main categories: lithium bromide absorption chillers and lithium bromide direct-fired chillers. Lithium bromide is composed of two elements: alkali metal lithium and halogen elements. Lithium bromide absorption chillers utilize the strong absorption capacity of lithium bromide solution for water vapor to achieve cooling or heating through absorption and desorption processes. The exhaust gas of lithium bromide units refers to the mixture of gases or vapors emitted from the unit during the operation of lithium bromide absorption chillers or heat pump units.

[0003] To reduce resource waste, staff will perform waste heat recovery operations on the exhaust gas generated by the lithium bromide unit, which requires the use of exhaust gas waste heat recovery devices. However, the exhaust gas of the lithium bromide unit contains some droplets or aerosols, which may adhere to the surface of the heat exchanger, causing localized corrosion of the heat exchanger and thus shortening its service life. Utility Model Content

[0004] The purpose of this invention is to provide a waste heat recovery device for lithium bromide generator exhaust gas, in order to solve the problem that droplets and aerosols in the exhaust gas of lithium bromide generator enter the heat exchanger, causing a shortened service life of the heat exchanger.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for lithium bromide generator tail gas, comprising a heat exchanger body, and further comprising:

[0006] An outlet pipe is connected to the outside of the heat exchanger body, and an inlet pipe is connected to the outside of the heat exchanger body. The end of the inlet pipe away from the heat exchanger body is connected to a connecting pipe.

[0007] A filter assembly is installed inside the connecting pipe. The filter assembly includes a filter screen body installed inside the connecting pipe. A fixing plate is fixedly connected to the top of the filter screen body. A backflush pipe is installed inside the connecting pipe. A track is fixedly connected inside the connecting pipe.

[0008] Preferably, a PLC controller is provided on the front surface of the connecting pipe, and a connecting flange is provided on one side of the connecting pipe.

[0009] Preferably, a gas storage tank is fixedly connected to the rear surface of the connecting pipe, and a delivery pump is fixedly connected to the rear surface of the connecting pipe.

[0010] Preferably, the air inlet of the delivery pump is connected to the air storage tank, the air outlet of the delivery pump is connected to a delivery pipe, and the end of the delivery pipe away from the delivery pump is connected to the outside of the backflush pipe.

[0011] Preferably, the outside of the backflush pipe is connected to a backflush head, and the inside of the connecting pipe is provided with a placement groove for use with the filter screen body.

[0012] Preferably, a first differential pressure sensor is provided on both sides of the inner wall of the intake pipe, and a second differential pressure sensor is provided on both sides of the inner wall of the connecting pipe.

[0013] Preferably, the connecting pipe has a groove inside, a rotating rod is rotatably connected inside the groove, a pressure plate is fixedly connected to the outside of the rotating rod, a spring is sleeved on the outside of the rotating rod, and the bottom of the spring is welded to the bottom of the groove cavity.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention, by incorporating a filter assembly, allows the exhaust gas from the lithium bromide generator unit to pass through a connecting pipe and reach the filter assembly during transport. The filter screen itself blocks and filters droplets in the exhaust gas, preventing them from entering the inlet pipe. It also prevents dust and other impurities from accumulating inside the heat exchanger, thus extending its service life. Furthermore, the backflush pipe and air tank allow compressed air to be ejected through them, backflushing the filter screen and reducing the frequency of filter replacement, thereby shortening downtime. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of the waste heat recovery device for lithium bromide generator tail gas provided by this utility model;

[0017] Figure 2 A schematic diagram showing the connection between the heat exchanger body and the air inlet pipe provided by this utility model;

[0018] Figure 3 A schematic diagram showing the connection between the connecting pipe and the filter screen body structure provided by this utility model;

[0019] Figure 4 A schematic diagram showing the connection structure of the gas storage tank and connecting pipe provided by this utility model;

[0020] Figure 5 A schematic diagram showing the connection between the gas storage tank and the backflush head provided by this utility model;

[0021] Figure 6 This is a schematic diagram of the internal structure of the connecting pipe provided by this utility model;

[0022] Figure 7 Provided by this utility model Figure 4 A magnified schematic diagram of the structure at point A shown.

[0023] In the diagram: 1. Heat exchanger body; 2. Outlet pipe; 3. Inlet pipe; 4. Connecting pipe; 5. Filter assembly; 51. Filter screen body; 52. Fixing plate; 53. Backflush pipe; 54. Track; 6. PLC controller; 7. Connecting flange; 8. Air storage tank; 9. Delivery pump; 10. Delivery pipe; 11. Backflush head; 12. Placement slot; 13. First differential pressure sensor; 14. Second differential pressure sensor; 15. Groove; 16. Rotating rod; 17. Pressure plate; 18. Spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-7 As shown, a waste heat recovery device for lithium bromide generator exhaust gas includes a heat exchanger body 1. The heat exchanger body 1 is a vertical shell-and-tube heat exchanger. Inside, a high-temperature fluid flows within the tubes or shell, releasing heat and lowering its temperature. A low-temperature fluid flows on the other side, absorbing heat and raising its temperature. Simultaneously, heat exchange between the two fluids is achieved through conduction and convection via the tube walls. The device also includes:

[0026] An outlet pipe 2 is connected to the outside of the heat exchanger body 1. The exhaust gas that has completed heat exchange inside the heat exchanger body 1 is transported through the outlet pipe 2. An inlet pipe 3 is connected to the outside of the heat exchanger body 1. The exhaust gas that has been filtered through the inlet pipe 3 enters the interior of the heat exchanger body 1 through the inlet pipe 3 for heat exchange. A connecting pipe 4 is connected to the end of the inlet pipe 3 away from the heat exchanger body 1. The exhaust gas generated by the lithium bromide unit can be filtered through the connecting pipe 4.

[0027] A filter assembly 5 is installed inside the connecting pipe 4. This assembly filters droplets or aerosols in the exhaust gas of the lithium bromide unit during normal operation. The filter assembly 5 includes a filter screen body 51 installed inside the connecting pipe 4. The filter screen body 51 filters and blocks droplets and other substances in the exhaust gas. The filter screen body 51 is made of ceramic fiber. A fixing plate 52 is fixedly connected to the top of the filter screen body 51, allowing operators to easily pull out and place it. A backflush pipe 53 is installed inside the connecting pipe 4, and a track 54 is fixedly connected inside the connecting pipe 4, facilitating the removal and placement of the filter screen body 51.

[0028] refer to Figure 2 , Figure 4 and Figure 5 As shown, a PLC controller 6 is installed on the front surface of the connecting pipe 4. The PLC controller 6 can control the differential pressure sensor, delivery pump 9 and solenoid valve in the device. A connecting flange 7 is installed on one side of the connecting pipe 4. The connecting flange 7 facilitates the disassembly, assembly and maintenance of the connecting pipe 4 and the air inlet pipe 3. An air storage tank 8 is fixedly connected to the rear surface of the connecting pipe 4. The air storage tank 8 can store air. A delivery pump 9 is fixedly connected to the rear surface of the connecting pipe 4. The delivery pump 9 can deliver the gas inside the air storage tank 8. The air inlet of the delivery pump 9 is connected to the air storage tank 8. The air outlet of the delivery pump 9 is connected to the delivery pipe 10. The delivery pipe 10 can make the gas reach the location of each backflush head 11. The end of the delivery pipe 10 away from the delivery pump 9 is connected to the outside of the backflush pipe 53.

[0029] refer to Figure 6 and Figure 7 As shown, the backflush pipe 53 is connected to a backflush head 11 on the outside. By setting multiple backflush heads 11, air can flow out from the inside of the backflush head 11 under the action of the backflush head 11, thereby performing a backflush operation on the filter screen body 51, so that some of the blocked substances can be removed from the filter screen body 51. The inside of the connecting pipe 4 is provided with a placement groove 12 that is used in conjunction with the filter screen body 51. By setting the placement groove 12, it is convenient for the staff to disassemble and assemble the filter screen body 51.

[0030] A first differential pressure sensor 13 is installed on both sides of the inner wall of the intake pipe 3, and a second differential pressure sensor 14 is installed on both sides of the inner wall of the connecting pipe 4. By setting two differential pressure sensors, both of which are ceramic capacitor differential pressure sensors, the pressure difference between the front and rear positions of the filter body 51 can be detected, thereby detecting the degree of blockage of the filter body 51. A groove 15 is opened inside the connecting pipe 4. By setting the groove 15, the rotating rod 16 can be rotated inside it. The rotating rod 16 is rotatably connected inside the groove 15. A pressure plate 17 is fixedly connected to the outside of the rotating rod 16. A spring 18 is sleeved on the outside of the rotating rod 16. By setting the spring 18, the rotating rod 16 can be moved to a designated position under the elastic force of the spring 18. Then, the pressure plate 17 positions the fixing plate 52 to prevent the filter body 51 from falling off. The bottom of the spring 18 is welded to the bottom of the inner cavity of the groove 15.

[0031] Working principle: When the operator performs waste heat recovery work on the exhaust gas generated by the lithium bromide unit using this device, the exhaust gas generated by the lithium bromide unit is first passed through the connecting pipe 4. Under the action of the filter body 51, the liquid droplets and aerosols in the exhaust gas can be filtered, extending the service life of the heat exchanger body 1. At the same time, when the filter body 51 is in use, the pressure difference before and after the filter body 51 can be detected by the first differential pressure sensor 13 and the second differential pressure sensor 14, thereby detecting the degree of blockage of the filter body 51. After the filter body 51 has been used for a period of time, the operator can start the delivery pump 9, so that the air inside the gas storage tank 8 can enter the backflush pipe 53 through the delivery pump 9, and then be discharged through multiple backflush heads 11, thereby performing backflush work on the filter body 51 and reducing the degree of blockage of the filter body 51.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] 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 lithium bromide unit tail gas waste heat recovery device, comprising a heat exchanger body (1), characterized in that, Also includes: An outlet pipe (2) is connected to the outside of the heat exchanger body (1), and an inlet pipe (3) is connected to the outside of the heat exchanger body (1). A connecting pipe (4) is connected to the end of the inlet pipe (3) away from the heat exchanger body (1). A filter assembly (5) is installed inside the connecting pipe (4). The filter assembly (5) includes a filter screen body (51) installed inside the connecting pipe (4). A fixing plate (52) is fixedly connected to the top of the filter screen body (51). A backflush pipe (53) is installed inside the connecting pipe (4). A track (54) is fixedly connected inside the connecting pipe (4).

2. The lithium bromide unit tail gas waste heat recovery device according to claim 1, characterized in that: A PLC controller (6) is provided on the front surface of the connecting pipe (4), and a connecting flange (7) is provided on one side of the connecting pipe (4).

3. The lithium bromide unit tail gas waste heat recovery device according to claim 1, characterized in that: A gas storage tank (8) is fixedly connected to the rear surface of the connecting pipe (4), and a delivery pump (9) is fixedly connected to the rear surface of the connecting pipe (4).

4. The lithium bromide unit tail gas waste heat recovery device according to claim 3, characterized in that: The air inlet of the delivery pump (9) is connected to the air storage tank (8), and the air outlet of the delivery pump (9) is connected to the delivery pipe (10). The end of the delivery pipe (10) away from the delivery pump (9) is connected to the outside of the backflush pipe (53).

5. The lithium bromide unit tail gas waste heat recovery device according to claim 1, characterized in that: The backflush pipe (53) is connected to a backflush head (11) on the outside, and the inside of the connecting pipe (4) is provided with a placement groove (12) that is used in conjunction with the filter screen body (51).

6. The lithium bromide unit tail gas waste heat recovery device according to claim 1, characterized in that: A first differential pressure sensor (13) is provided on both sides of the inner wall of the air intake pipe (3), and a second differential pressure sensor (14) is provided on both sides of the inner wall of the connecting pipe (4).

7. The lithium bromide unit tail gas waste heat recovery device according to claim 1, characterized in that: The connecting pipe (4) has a groove (15) inside, and a rotating rod (16) is rotatably connected inside the groove (15). A pressure plate (17) is fixedly connected to the outside of the rotating rod (16), and a spring (18) is sleeved on the outside of the rotating rod (16). The bottom of the spring (18) is welded to the bottom of the inner cavity of the groove (15).

Images