Purifying device for lithium bromide solution after water feeding of absorption heat pump

Abstract

The utility model relates to the technical field of solution purification, discloses a purification device for lithium bromide solution of an absorption heat pump after water feeding, and solves the problem that the existing lithium bromide solution needs to be purified due to water doping. By integrating the heating tower and the multi-stage filter plates, uniform heating and continuous multi-stage filtration of a solution are realized, moisture and other impurities are effectively removed, heat transfer efficiency is enhanced by heat dissipation fins arranged on a heat conduction column of the device at equal intervals, high efficiency of a purification process is ensured, and by virtue of the progressive increase filter precision design of the multi-stage filter plates, the purification efficiency is improved. Continuous purification from rough filtration to fine filtration is achieved, impurities are prevented from passing through, the purity of a lithium bromide solution is improved, in addition, the cleanliness of the solution is further improved through activated carbon net surface layers at ports of the exhaust pipe and the exhaust pipe, one-way flowing of fluid is guaranteed through the arrangement of a one-way valve, countercurrent and system pollution are prevented, and the service life of the system is prolonged. The design of the vertical slope groove and the waste residue pipe on the inner bottom surface of the reaction box facilitates smooth discharge of waste residues.

Description

Technical Field

[0001] The utility model relates to the technical field of solution purification, in particular to a device for purifying lithium bromide solution after water inflow into an absorption heat pump. Background Art

[0002] Lithium bromide (LiBr) solution is a key working medium in absorption refrigeration and heat pump systems, renowned for its efficient heat absorption and release properties. It exhibits high thermal stability at commonly used concentrations, can withstand high-temperature operating conditions without decomposition, exhibits low corrosion to most metal materials, can operate at higher temperatures without boiling, and helps prevent the system from freezing in low-temperature environments. The temperature of the LiBr solution fluctuates minimally during the absorption or release of the same amount of heat. Therefore, maintaining a high-purity LiBr solution is crucial to ensuring the efficient operation and long-term stability of the system. However, due to its toxicity, strict safety measures and proper handling methods must be implemented to prevent leakage and improper discharge of the LiBr solution.

[0003] The existing Chinese patent with publication number CN213454389U discloses an online purification device for lithium bromide solution after water is introduced into an absorption heat pump. The device forms a sealed space through a box and a purification chamber to isolate the operator from the purification process; the combustion basin and solution box are used to heat the lithium bromide solution to achieve water evaporation; the ignition component and turbo fan achieve automatic ignition and drive the fan to form an exhaust system to discharge the evaporated water vapor; the operation port and movable door provide an operating interface while ensuring the safety of the operator; the device heats the lithium bromide solution in the solution box through smokeless carbon in the combustion basin, and the evaporated water vapor is discharged through the exhaust system, thereby achieving purification. This solution uses smokeless carbon as a heat source. The high temperature or flying sparks that may be generated during the combustion process may pose hidden dangers such as improper fire source control or uneven heating. Incomplete combustion of smokeless carbon may produce harmful gases such as carbon monoxide or nitrogen oxides. The parts in contact with the combustion basin and the solution box will produce high-temperature surfaces. If the solution box is not sealed enough or the material heat resistance does not meet the standards, it may cause solution leakage or container rupture, causing scalds or chemical burns. In addition, automatic ignition may result in ignition failure or accidental ignition, increasing the risk of fire.

[0004] In view of the above-mentioned related technologies, a purification device for the lithium bromide solution of an absorption heat pump after water inflow is now provided, which can eliminate the disadvantages of the existing device. Utility Model Content

[0005] The purpose of the utility model is to provide a device for purifying lithium bromide solution after water inflow in an absorption heat pump. The device is used to work, thereby solving the problem that the existing lithium bromide solution needs to be purified due to water doping.

[0006] To achieve the above-mentioned object, the utility model provides the following technical solution: a device for purifying lithium bromide solution after water inflow by an absorption heat pump, comprising a reaction box, wherein the outer walls on both sides of the bottom of the reaction box are respectively connected with an infusion tube and a liquid guide tube, an exhaust pipe is connected to one side of the top of the reaction box, and the exhaust pipe is connected to a vacuum pump outside the reaction box, and an exhaust pipe is connected to the other side of the top of the reaction box, a fan is provided at one end of the exhaust pipe, and a condenser is provided at the other end, a heating tower and a filter are provided inside the reaction box, and the heating tower is provided with a multi-stage filter plate along the vertical direction;

[0007] The heating tower is fixedly installed in the middle of the inner bottom surface of the reaction box. The heating tower includes a heat-conducting column, which is electrically connected to the electric heater outside the reaction box. The heat-conducting column is fixed with a plurality of heat dissipation fins at equal intervals along the vertical direction.

[0008] Preferably, the filter screen includes a primary filter screen and a secondary filter screen, the mesh size of the primary filter screen is larger than that of the secondary filter screen, and the mesh density of the primary filter screen is smaller than that of the secondary filter screen.

[0009] Preferably, slots are provided on the plurality of heat dissipation fins.

[0010] Preferably, a multi-stage filter plate is inserted into the slot.

[0011] Preferably, the filtration accuracy of each level of the multi-stage filter plate increases in order from low to high in distance from the bottom surface of the reaction box.

[0012] Preferably, the mesh size of the top layer of the multi-stage filter plate is smaller than the mesh size of the secondary filter screen.

[0013] Preferably, vertical slope grooves are provided on the inner bottom surface of the reaction box near the primary filter screen and the secondary filter screen.

[0014] Preferably, the lower end of the vertical slope trough is connected to a waste slag pipe.

[0015] Preferably, the infusion tube, the catheter, the air extraction tube and the exhaust tube are all provided with a one-way valve.

[0016] Preferably, an activated carbon mesh layer is provided at the ports where the air extraction pipe and the exhaust pipe are connected to the interior of the reaction box.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The utility model proposes a device for purifying lithium bromide solution after water inflow in an absorption heat pump. The device realizes uniform heating and continuous filtration of the solution through the heating tower and multi-stage filter plates integrated in the reaction box, ensuring the effective removal of moisture and other impurities. In particular, the equidistantly arranged heat dissipation fins on the heat-conducting column enhance the heat transfer efficiency, and the incremental filtration accuracy design of the multi-stage filter plates ensures a continuous purification process from coarse filtration to fine filtration, avoiding the passage of impurities, thereby improving the purity of the lithium bromide solution.

[0019] 2. The utility model proposes a purification device for the lithium bromide solution of an absorption heat pump after it enters the water. The activated carbon mesh layer arranged at the ports of the exhaust pipe and the exhaust pipe effectively absorbs possible organic pollutants, further improving the cleanliness of the solution. At the same time, the one-way valves equipped on the infusion pipe, the liquid guide pipe, the exhaust pipe and the exhaust pipe ensure the one-way flow of the fluid in the system, preventing backflow and potential system pollution. In addition, the vertical slope groove and waste residue pipe specially designed on the bottom surface of the reaction box facilitate the smooth discharge of waste residue, reduce maintenance costs, and improve the automation level and operation efficiency of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the bottom-up structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure inside the reaction box of the utility model;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model along the AA axis.

[0024] In the figure: 1. Reaction box; 10. Vertical slope trough; 11. Waste residue pipe; 12. Infusion pipe; 13. Liquid guide pipe; 14. Vacuum pipe; 15. Exhaust pipe; 2. Fan; 3. Condenser; 4. Heating tower; 41. Heat conduction column; 42. Heat dissipation fins; 420. Slot; 5. Filter; 51. Primary filter; 52. Secondary filter; 6. Multi-stage filter plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0027] Combine Figures 1-4A device for purifying lithium bromide solution after water inlet into an absorption heat pump comprises a reaction box 1. An infusion tube 12 and a liquid guide tube 13 are respectively connected on the outer walls on both sides of the bottom of the reaction box 1 for inputting and outputting the solution. An exhaust pipe 14 is connected to one side of the top of the reaction box 1. The exhaust pipe 14 is connected to the vacuum pump outside the reaction box 1 to facilitate pre-vacuuming the reaction box 1. An exhaust pipe 15 is connected to the other side of the top of the reaction box 1. A fan 2 is provided at one end of the exhaust pipe 15 and a condenser 3 is provided at the other end to discharge the evaporated water and condense and recover it. The ports where the exhaust pipe 14 and the exhaust pipe 15 are connected to the inside of the reaction box 1 are both provided with an activated carbon mesh layer to effectively absorb organic impurities and further improve the purity of the solution. One-way valves are provided on the infusion tube 12, the liquid guide tube 13, the exhaust pipe 14 and the exhaust pipe 15 to ensure that the fluid flows in the predetermined direction and prevent backflow and cross contamination. A heating tower 4 and a filter screen 5 are provided inside the reaction box 1. The heating tower 4 is provided with multi-stage filter plates 6 in a vertical direction to achieve step-by-step heating and filtering of the solution.

[0028] The heating tower 4 is fixedly installed in the middle of the inner bottom surface of the reaction box 1. The heating tower 4 includes a heat-conducting column 41. Four heat-conducting columns 41 are electrically connected to the electric heater outside the reaction box 1. The heat-conducting columns 41 are fixed with multiple heat-dissipating fins 42 at equal intervals in the vertical direction; the heat-conducting columns 41 are heated by the electric heater and quickly transfer heat through the heat-dissipating fins 42; slots 420 are opened on the multiple heat-dissipating fins 42, and multi-stage filter plates 6 are inserted into the slots 420. The filtration accuracy of each level of the multi-stage filter plate 6 increases in sequence from low to high in order of distance from the inner bottom surface of the reaction box 1. The mesh size of the top layer of the multi-stage filter plate 6 is smaller than the mesh size of the secondary filter screen 52. The cleanliness of the solution is ensured through multi-stage filtration.

[0029] The filter 5 comprises a primary filter 51 and a secondary filter 52. The mesh size of the primary filter 51 is larger than that of the secondary filter 52, achieving a coarse-to-fine filtration process. The mesh density of the primary filter 51 is smaller than that of the secondary filter 52. This design allows larger particles of impurities to be intercepted by the primary filter 51, while finer impurities are further filtered by the secondary filter 52, ensuring a hierarchical and thorough filtration effect.

[0030] The inner bottom surface of the reaction box 1 is provided with vertical slope grooves 10 near the primary filter 51 and the secondary filter 52. The lower end of the vertical slope groove 10 is connected to a waste residue pipe 11, which facilitates the discharge of waste residue and impurities into the waste residue pipe 11 along the slope groove 10, thereby achieving smooth discharge of waste and keeping the internal cleanliness of the system.

[0031] Working Principle: The solution to be purified is drawn through an external vacuum pump through an exhaust pipe 14, creating negative pressure. The solution is then introduced into the reaction chamber 1 through an infusion tube 12. A heating tower 4 is located within the reaction chamber 1. This heating tower 4 consists of four heat-conducting columns 41 connected to an external electric heater. These columns are vertically equipped with multiple heat sink fins 42 to improve heating efficiency. Furthermore, activated carbon mesh layers are located at the ends of the exhaust pipe 14 and exhaust pipe 15 to adsorb organic impurities in the solution and ensure purification quality. During the heating process, the lithium bromide solution evaporates, and the resulting water vapor then enters the exhaust pipe 15. This vapor is then condensed into liquid water in the condenser 3 by the fan 2 and recovered. Inside the reaction box 1, there are a primary filter 51 and a secondary filter 52, wherein the mesh size of the primary filter 51 is larger than that of the secondary filter 52, achieving preliminary filtration; the multi-stage filter plate 6 is plugged into the slot 420 of the heat sink fin 42, and the filtration accuracy of each layer of filter plate increases from bottom to top. The filtration accuracy of the top filter plate 6 is smaller than that of the secondary filter 52, ensuring that the solution is finely filtered step by step during the rising process. The vertical slope groove 10 at the bottom of the reaction box 1 guides the waste residue and impurities to flow to the lower end and are discharged through the waste residue pipe 11. To ensure the flow direction of the solution, the infusion tube 12, the liquid guide tube 13, the exhaust pipe 14 and the exhaust pipe 15 are all equipped with one-way valves. The entire purification process is carried out with the assistance of pre-vacuuming by a vacuum pump, ensuring the purification efficiency and solution quality.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A purification device for an absorption heat pump lithium bromide solution after water inflow, comprising a reaction box (1), wherein the outer walls on both sides of the bottom of the reaction box (1) are respectively connected with a liquid infusion tube (12) and a liquid guide tube (13), a top side of the reaction box (1) is connected with an exhaust pipe (14), the exhaust pipe (14) is connected to a vacuum pump outside the reaction box (1), and the other side of the top of the reaction box (1) is connected with an exhaust pipe (15), one end of the exhaust pipe (15) is provided with a fan (2), and the other end is provided with a condenser (3), characterized in that: A heating tower (4) and a filter screen (5) are provided inside the reaction box (1), and the heating tower (4) is provided with multi-stage filter plates (6) in a vertical direction; The heating tower (4) is fixedly mounted on the middle portion of the inner bottom surface of the reaction box (1). The heating tower (4) comprises heat-conducting columns (41). Four heat-conducting columns (41) are electrically connected to an electric heater outside the reaction box (1). The heat-conducting columns (41) are fixedly provided with a plurality of heat-dissipating fins (42) at equal intervals in a vertical direction.

2. The purification device for the absorption heat pump lithium bromide solution after water inflow according to claim 1, characterized in that: The filter screen (5) comprises a primary filter screen (51) and a secondary filter screen (52), the mesh size of the primary filter screen (51) is larger than that of the secondary filter screen (52), and the mesh density of the primary filter screen (51) is smaller than that of the secondary filter screen (52).

3. The purification device for the absorption heat pump lithium bromide solution after water inflow according to claim 1, characterized in that: Slots (420) are formed on the plurality of heat dissipation fins (42).

4. The purification device for the absorption heat pump lithium bromide solution after water inflow according to claim 3, characterized in that: The slot (420) is plugged with a multi-stage filter plate (6).

5. The purification device for the absorption heat pump lithium bromide solution after water inflow according to claim 1, characterized in that: The filtering accuracy of each level of the multi-stage filter plate (6) increases in order from low to high in distance from the inner bottom surface of the reaction box (1).

6. The purification device for the absorption heat pump lithium bromide solution after water inflow according to claim 2, characterized in that: The mesh size of the top layer of the multi-stage filter plate (6) is smaller than the mesh size of the secondary filter screen (52).

7. The purification device for the absorption heat pump lithium bromide solution after water inflow according to claim 1, characterized in that: The inner bottom surface of the reaction box (1) is provided with vertical slope grooves (10) near the first filter screen (51) and the second filter screen (52).

8. The purification device for the absorption heat pump lithium bromide solution after water inflow according to claim 7, characterized in that: The lower end of the vertical slope trough (10) is connected to a waste slag pipe (11).

9. The purification device for the absorption heat pump lithium bromide solution after water inflow according to claim 1, characterized in that: One-way valves are provided on the liquid infusion tube (12), the liquid guiding tube (13), the air extraction tube (14) and the air exhaust tube (15).

10. The device for purifying lithium bromide solution after water inflow for an absorption heat pump according to claim 1, characterized in that: The ports of the exhaust pipe (14) and the exhaust pipe (15) communicating with the interior of the reaction box (1) are both provided with an activated carbon mesh layer.

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