CN201935620U - Novel heat exchange system with lithium bromide absorption set - Google Patents

Abstract

The utility model relates to a novel heat exchange system with a lithium bromide absorption unit, which belongs to the technical field of heat exchangers. Including heat exchanger (2), lithium bromide absorption unit (5), heat extraction and hot water pipeline system (3), heat release heat source pipeline system (1) and heat use place (4), heat release heat source pipeline system (1) The exothermic heat source coming over first enters the generator (504) of the lithium bromide absorption unit (5) as the driving heat source to cool down once, and then enters the heat exchanger (2) to cool down for the second time; Take hot water and return water in parallel and divide it into two paths, one path enters the absorber (502) and condenser (503) of the lithium bromide absorption unit (5) in parallel or in series; the other path first enters the evaporator of the lithium bromide absorption unit (5) (501) After refrigeration and cooling down, it enters the heat exchanger (2) and exothermic hot water to heat up and heat up. place (4). The utility model can realize the purpose of increasing the effective heat exchange temperature difference of the exothermic heat source.

Description

New heat exchange system with lithium bromide absorption unit

technical field

The utility model relates to a novel heat exchange system with a lithium bromide absorption unit. It belongs to the technical field of heat exchangers.

Background technique

The general heat exchanger system is shown in Figure 1 (water-water heat exchanger in the figure), the heat source of heat release and the heat source of heat extraction pass through the heat exchange tube (shell and tube heat exchanger) or the heat exchange surface (plate heat exchange) device) for heat exchange, transfer the heat in the exothermic heat source to the hot water for heating, the temperature of the exothermic heat source drops, and the temperature of the heat extraction heat source rises, completing the process of the heat extraction heat source taking heat from the exothermic heat source, heat extraction The heat source is transported to the heat-using place for production or living and heating. The carrier of the heat source can be water, heat transfer oil or other media.

Using a common heat exchanger system for heat exchange, a certain heat exchange temperature difference between the exothermic heat source and the heat extraction heat source is required to achieve effective heat exchange, so the outlet temperature of the exothermic heat source should theoretically be higher than the inlet temperature of the heat extraction heat source. After the temperature of the heat extraction heat source is determined, the outlet temperature of the heat release heat source is limited, and the available temperature difference of the heat release heat source is limited by the temperature of the heat extraction heat source. If a new process and system can be adopted, the outlet temperature of the exothermic source can be reduced while ensuring the temperature of the heat source, and the bottleneck that is higher than the inlet temperature of the heat source can be broken.

Under the premise of comprehensive consideration of heat exchange system investment, resistance loss, pressure, type of heat source, water quality and other factors, how to realize that the outlet temperature of the exothermic heat source is lower than the inlet temperature of the heat source, and increase the effective use of the temperature difference of the exothermic heat source, Achieving energy saving and emission reduction and reducing operating costs have become a research topic that needs to be solved.

Contents of the invention

The purpose of the utility model is to overcome the above disadvantages, and provide a new heat exchange system with a lithium bromide absorption unit capable of increasing the effective heat exchange temperature difference of the exothermic heat source.

The purpose of this utility model is achieved in the following way: a novel heat exchange system with a lithium bromide absorption unit, including a heat exchanger, a hot water pipeline system, a heat release heat source pipeline system and a heat place, the system A lithium bromide absorption unit is added, and the lithium bromide absorption unit includes an evaporator, an absorber, a condenser and a generator. The exothermic heat source from the exothermic heat source pipeline system enters the generator tube through the exothermic heat source and first enters the lithium bromide absorption unit. The generator of the type unit is used as the driving heat source to cool down once, and then enters the heat exchanger connecting pipe 7 through the exothermic heat source and enters the heat exchanger for secondary cooling; One way is to take hot water into the absorber tube in parallel or in series to enter the absorber and condenser of the lithium bromide absorption unit, heat up to get heat, and become one way to take hot water for water supply; the other way is to take hot water into the evaporator first After the pipe enters the evaporator of the lithium bromide absorption unit for cooling and cooling, the hot water is taken out of the evaporator and enters the heat exchanger, and the pipe enters the heat exchanger and releases hot water for heat exchange to raise the temperature, and becomes another way of hot water supply for water supply , the two hot water supply channels are transported to the hot place through the hot water pipeline system after being individually or combined.

In the utility model, by adding a lithium bromide absorption unit, the hot water returned to the heat exchanger is refrigerated by the evaporator of the lithium bromide absorption unit to ensure that the temperature entering the heat exchanger is much lower than that of the hot water returned to the heat exchanger. Temperature (that is, the temperature of hot water returning to the evaporator), so as to ensure that under the premise of effective heat exchange, the temperature of the exothermic hot water leaving the heat exchanger is lower than the temperature of returning hot water, which is directly used in the past Compared with the heat exchanger system, the utility model can realize the purpose of increasing the effective heat exchange temperature difference of exothermic hot water.

The beneficial effects of the utility model are:

1. When the flow rate of the exothermic heat source is fixed, if the exothermic heat source is the waste heat existing in the production process (especially the waste heat is an open system), or the high-temperature groundwater is used to obtain heat, under the premise that the working conditions are suitable, the utility model can be used to replace The thermal system improves the effective use of the temperature difference of the exothermic heat source, which can increase the amount of heat extraction and utilization, and improve the energy-saving effect of the system.

2. When the amount of heat taken is fixed (such as the waste heat system of the production process or the centralized heating system), the heat exchange system of the utility model can be used to improve the effective use of the temperature difference of the exothermic heat source, which can reduce the flow rate of the exothermic heat source and reduce the investment of the exothermic heat source delivery system and energy consumption, and if the exothermic heat source is rich, it can also be reserved for other uses.

Description of drawings

Figure 1 is a general heat exchanger system diagram.

Fig. 2 is a new heat exchange system diagram of the utility model with a lithium bromide absorption unit.

Reference signs in the figure:

Exothermic heat source pipeline system 1, heat exchanger 2, heat extraction and hot water pipeline system 3, heat utilization place 4, lithium bromide absorption unit 5, exothermic heat source into generator tube 6, exothermic heat source out of generator into exchange Heater connecting pipe 7, exothermic heat source out of heat exchanger tube 8, hot water taken out of evaporator into heat exchanger connected pipe 9, hot water taken out of heat exchanger tube 10, hot water taken out of evaporator tube 11. Take hot water into the absorber pipe 12, take hot water out of the condenser pipe 13;

Evaporator 501, absorber 502, condenser 503, generator 504.

Detailed ways

Referring to Fig. 2, Fig. 2 is a diagram of a novel heat exchange system with a lithium bromide absorption unit of the present invention. As can be seen from Figure 2, the utility model is a novel heat exchange system with a lithium bromide absorption unit, which consists of a lithium bromide absorption unit 5, a heat exchanger 2, a hot water pipeline system 3, and a heat release heat source pipeline system 1. It is composed of heat place 4, related connecting pipeline valves and control system (not shown in the figure). The lithium bromide absorption unit 5 includes an evaporator 501, an absorber 502, a condenser 503, and a generator 504. The exothermic heat source from the exothermic heat source pipeline system 1 enters the generator tube 6 through the exothermic heat source and first enters the lithium bromide absorption type unit. The generator 504 of unit 5 is used as the driving heat source to cool down once, and then enters the heat exchanger through the exothermic heat source, and the connecting pipe 7 enters the heat exchanger 2 to heat the exothermic hot water, and then the exothermic heat source exits the heat exchanger The pipe 8 is discharged from the system; the hot water and return water from the hot place 4 are connected in parallel and divided into two paths, and one path is connected to the absorber 502 and the condenser 503 of the lithium bromide absorption unit 5 in parallel or in series through the hot water inlet pipe 12 (It can be connected in parallel or in series) to heat up and get heat, and it becomes one way to get hot water for water supply; The hot water goes out of the evaporator and enters the heat exchanger. Connecting pipe 9 enters the heat exchanger 2 and heats up the exothermic hot water to raise the temperature, and becomes another way to get hot water for water supply. The heat exchanger pipe 10 and the hot water outlet condenser pipe 13 are separated or merged (converged in the figure) and then transported to the heat using place 4 through the hot water pipeline system 3 for use.

The lithium bromide absorption unit in the above scheme can be a single-effect, double-effect or two-stage unit, and the medium of the exothermic heat source can be water, heat transfer oil or other media. Getting hot water can also make other liquid exothermic media. The exothermic heat source system and the heat extraction heat source water system can be either closed circulation systems or open systems.

Claims (4)

1. heat exchanging system with lithium bromide absorption-type machine unit, comprise heat exchanger (2), heat-obtaining hot water tube system (3), heat release thermal source pipe-line system (1) and with thermal field institute (4), it is characterized in that: described system has additional the absorption unit of monobromination lithium (5), this lithium bromide absorption-type machine unit (5) comprises evaporimeter (501), absorber (502), condenser (503) and generator (504), the heat release thermal source that goes out described heat release thermal source pipe-line system (1) inserts the generator (504) of lithium bromide absorption-type machine unit (5) by the heat release thermal source living organ pipe (6) of setting out, and the driving heat source that goes out described generator (504) goes out generator by the heat release thermal source and advances heat exchanger connecting leg (7) and insert heat exchanger (2); The heat-obtaining hot water backwater parallel connection that goes out with thermal field institute (4) is divided into two the tunnel, the heat-obtaining hot water of leading up to advances the absorber (502) and the condenser (503) of absorber tube (12) parallel connection or series connection access lithium bromide absorption-type machine unit (5), becomes one road heat-obtaining hot water after coming out and supplies water; The evaporimeter (501) that evaporator tube (11) inserts lithium bromide absorption-type machine unit (5) is advanced by heat-obtaining hot water in another road, the heat-obtaining hot water backwater who goes out described evaporimeter (501) goes out evaporimeter by heat-obtaining hot water and advances heat exchanger connecting leg (9) access heat exchanger (2), become another road heat-obtaining hot water after coming out and supply water, described two road heat-obtaining hot water supply water separately or converge the back and insert with thermal field institute (4) by heat-obtaining hot water tube system (3).

2. a kind of heat exchanging system with lithium bromide absorption-type machine unit according to claim 1 is characterized in that: described lithium bromide absorption-type machine unit is single-action, economic benefits and social benefits or diarcs unit.

3. a kind of heat exchanging system with lithium bromide absorption-type machine unit according to claim 1 is characterized in that: the medium of described heat release thermal source is water or conduction oil.

4. a kind of heat exchanging system with lithium bromide absorption-type machine unit according to claim 1 is characterized in that: described heat release thermal source pipe-line system (1) and heat-obtaining hot water tube system (3) are closed circulation systems, or open system.

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