CN2665603Y

CN2665603Y - Vacuum evaporation heating system

Info

Publication number: CN2665603Y
Application number: CN 200320124680
Authority: CN
Inventors: 刘寄声
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-28
Filing date: 2003-11-28
Publication date: 2004-12-22
Anticipated expiration: 2013-11-28

Abstract

A vacuum evaporation heating system comprises a boiler, a radiator, a heat-supply pipeline, and a fluid return pipeline. Before being put into use, the system should be vacuumed and then filled with actuating medium that can be water or low-boiling-point working substance such as acetone, ethanol, methanol, etc. Water or low-boiling-point working substance is taken as the actuating medium which can be changed in phase in a lower temperature, therefore the heat energy carried by the utility model has high density and low temperature. The low-temperature actuating medium results in the less heat loss in the system pipeline, high heat transfer efficiency of the system and good heating effect.

Description

A kind of vacuum evaporation heating system

The utility model relates to a kind of new-type heating installation, relates to a kind of vacuum evaporation heating system specifically.

At present, modal heating system generally has two kinds, and a kind of is hot water system, and another kind is a steam heating system.The working media of hot water system is liquid water, and the entrained heat density of aqueous water is lower.The working media of steam heating system is the water after undergoing phase transition, water vapour just, and the heat density height that water vapour is entrained, but its operating temperature is also high, and generally all must be above 100 ℃.Working media temperature height in the system has two shortcomings: one, and the heat loss of pipeline is big; Its two, the easy fouling of internal system influences system's heat transfer efficiency, and wastes energy.

The purpose of this utility model is: provide a kind of working media temperature low, carry the high heating system of heat density, thereby reduce the heat loss of pipeline, improve the heat transfer efficiency of system.

The purpose of this utility model is achieved in that a kind of vacuum evaporation heating system, it mainly is made up of boiler (1), radiator (2), heat supply pipeline (3) and back liquid pipeline (4) etc., and the top of described boiler (1) is communicated with an end of heat supply pipeline (3); The inlet of the other end of this heat supply pipeline (3) and radiator (2) joins; Steam trap (13) is equipped with in the outlet of radiator (2); The outlet of steam trap (13) is communicated with an end of back liquid pipeline (4); The other end of this back liquid pipeline (4) communicates with boiler (1); It is characterized in that: before the normal operation, need internal system is pumped into the negative pressure that absolute pressure is 7000-100pa, and in system, charge into working media (5); Tubing pump (12), magnetic valve (7) and two valves (f1), (f2) are housed on the described heat supply pipeline (3); Described two valves (f1), (f2) join with air collector (14), pressure vacuum gauge (10) respectively, and vavuum pump (6) is housed on this air collector (14); Valve (f3) is housed on the described back liquid pipeline (4); The other end of valve (f3) with add flow container (9) and link to each other.

The utility model has been compared following advantage with present modal heating system: one, and the operating temperature of working media of the present utility model (5) is low, and it is the highest to have only 60 ℃, and the maximum temperature of general common hot water system can reach 95 ℃; Its two, the heat density height that water of the present utility model is entrained, the heat energy that the 1kg water in the utility model heating system carries can surpass 2400kJ, and the 1kg water in the general common hot water system only carries the heat energy of 104.67kJ.This temperature is low, can reduce the heat loss of pipeline, can prevent that also scale formation from appearring in internal system; The heat density height that working media is entrained, heat transfer efficiency are also just high naturally.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is a system schematic of the present utility model.

Among the figure: (1) is boiler; (2) be radiator; (3) be heat supply pipeline; (4) be back liquid pipeline; (5) be working media; (6) be vavuum pump; (7) be magnetic valve; (8) be fluid reservoir; (9) for adding flow container; (10) be pressure vacuum gauge; (11) be Pressure gauge; (12) be tubing pump; (13) be steam trap; (14) be air collector; (15) be heater; (f8) be bypass valve; (f1), (f2), (f3), (f4), (f5), (f6), (f7), (f8), (f9) are valve.

As shown in Figure 1, system of the present utility model is identical with common heating system, and it also is made up of boiler (1), radiator (2), heat supply pipeline (3) and back liquid pipeline (4) etc.The top of described boiler (1) is communicated with an end of heat supply pipeline (3); The inlet of the other end of this heat supply pipeline (3) and radiator (2) joins; Steam trap (13) is equipped with in the outlet of radiator (2); The outlet of steam trap (13) is communicated with an end of back liquid pipeline (4); The other end of this back liquid pipeline (4) communicates with boiler (1).It is characterized in that: tubing pump (12), magnetic valve (7) and two valves (f1), (f2) are housed on the described heat supply pipeline (3); Described two valves (f1), (f2) join with air collector (14), pressure vacuum gauge (10) respectively, and vavuum pump (6) is housed on this air collector (14); Valve (f3) is housed on the described back liquid pipeline (4); The other end of valve (f3) with add flow container (9) and link to each other.

After this system installs, should be at first to system's leak detection, pressure testing, can use after qualified.Before system uses, should open valve (f1), (f2) earlier and (f7) vacuumize for system, observe pressure vacuum gauge (10) simultaneously, after intrasystem absolute pressure reaches 7000-100pa, valve-off (f1) and (f7), open valve (f3) simultaneously and pour into working media (5) in system, its amount of pouring into will adapt to different from the requirement of cold operating mode, and the volume that generally pours into working media (5) should account for the 10-40% of internal system total measurement (volume); And then open valve (f1) and vacuumize for system; After intrasystem absolute pressure is less than 7000pa, valve-off (f1); Be that heater (15) is connected power supply at last, system will move automatically.

The working media that charges in the utility model system (5) can be a water, also can be low boiling working fluids such as acetone, ethanol, methyl alcohol.Below we are that working media (5) is had a look at for example with water, why high the heat transfer efficiency of the utility model system is? begin heating after the heater (15) of boiler (1) lining is connected power supply, at this moment, the water of boiler (1) lining is heated intensification.Specific heat of water is 4.1868kJ/kg. ℃, and in other words, 1 ℃ of heat energy that needs 4.1868kJ of the water of 1kg rising we can say that also the every rising of the water of 1kg has just been carried the heat energy of 4.1868Kj for 1 ℃ more in the system.The boiling point that water is depressed at a normal atmosphere is 100 ℃, can be in the environment of 7000pa negative pressure in absolute pressure, its boiling point has become 40 ℃, that is to say, when water temperature is heated to 40 ℃ with regard to start vaporizer.The latent heat of vaporization of water in the time of 40 ℃ is 2406.5kJ/kg, and in other words, after the water of 1kg was vaporized fully, its entrained heat energy had just increased 2406.5kJ again.If time liquid temp of system is 30 ℃, so, the heat energy that 1kg water carries in the system just should be: 4.1868kJ * 10+2406.5kJ=2448.268kJ.Why is the heat transfer efficiency of the utility model system high like this? its reason is because phase transformation has taken place for its water, many big latent heats of vaporization of individual amount.In fact, this is the situation of water temperature when being heated to 40 ℃; If the water temperature of boiler (1) lining is not 40 ℃, but 60 ℃, the entrained heat energy of 1kg water just should be in the system so: 4.1868kJ * 30+2406.5kJ=2532.104kJ.We know that the 1kg water in the general common hot water system only carries the heat energy of 104.67kJ.In view of this, the utility model system has howed than the heat transfer efficiency height of general common hot water system, if the working media in the utility model system (5) is a water, the water temperature of boiler (1) lining keeps 60 ℃ words, so, the heat transfer efficiency of the utility model system is general common more than 24 times of hot water system.Also more than in fact these because the water temperature in the general common hot water system is high more a lot of than the water temperature of the utility model system, therefore, also big naturally many of the pipeline heat loss of general common hot water system.In view of this, above 24 times also is not final numeral, and final numeral is also bigger than this.

This be the working media (5) of the utility model system for the situation of water, if not water, but low boiling working fluids such as acetone, ethanol, methyl alcohol, its heat transfer efficiency is more much higher than general common hot water system in the same old way.Reason is very simple, because the operating temperature of low boiling working fluids such as acetone, ethanol, methyl alcohol is lower, and also easier undergoing phase transition, the more portable latent heat of vaporization that goes up.Because use these low boiling working fluids the advantage place reason with make the basic identical of water, so just do not described in detail at this.

As shown in Figure 1, on the heat supply pipeline (3) tubing pump (12) is housed.The purpose of dress tubing pump (12) is in order to increase the pressure of radiator portion, to help steam state working media (5) rapid condensation in the inflow radiator (2), and emit heat, thereby reach the purpose of heating.Described tubing pump (12) is in parallel with a bypass valve (f8).Open bypass valve (f8) when system vacuumizes, so, radiator (2) just has not been subjected to the obstruct of tubing pump (12), thereby just can successfully together have been taken out to negative pressure with whole system.After exhausting vacuum, close bypass valve (f8) again.

After system's operation, the situation that influences system's operate as normal mainly contains two kinds: one, system sealing is bad, the subnormal ambient of system is destroyed, make the elevation of boiling point of working media (5), so, the operating temperature of boiler (1) will raise, the temperature of pipeline also must raise, thereby has strengthened the heat loss of boiler jacket and pipeline; Its two, the working media that has (5) and shell contact for a long time chemistry or electrochemical reaction can take place, and produce incoagulable gas, thereby influence system's operate as normal.For preventing above-mentioned situation, the utility model is equipped with air collector (14) and vavuum pump (6) on hot channel (3).So, the incoagulable gas of generation can be stored in the air collector (14), by vavuum pump (6) incoagulable gas is extracted out from system then; When the subnormal ambient of system is destroyed also vacuum available pump (6) remedy.For the temperature that prevents boiler (1) takes place to cause system's internal pressure too high unusually, the utility model has been adorned magnetic valve (7) on heat supply pipeline (3).When system's internal pressure was too high, magnetic valve (7) was opened, and pressure will reduce naturally.

The low boiling working fluid that has is poisonous, and in order not destroy environment, the outlet of vavuum pump of the present utility model (6) and magnetic valve (7) all links to each other with fluid reservoir (8).So, just can there be fluid reservoir (8) lining in the material that vavuum pump (6) and magnetic valve (7) are discharged, thereby the environment that can guarantee the system outside is not destroyed.In order to understand the working condition of fluid reservoir (8), valve (f6) has been installed on this fluid reservoir (8), the other end of valve (f6) is equipped with Pressure gauge (11).For the ease of removing the material that store up fluid reservoir (8) lining, four valves (f4), (f5), (f8), (f9) are housed on the described fluid reservoir (8); When removing the material that stores up fluid reservoir (8) lining, close above-mentioned four valves, like this, just can relievedly fluid reservoir (8) be disassembled, transported.

Claims

1. vacuum evaporation heating system, it mainly is made up of boiler (1), radiator (2), heat supply pipeline (3) and back liquid pipeline (4) etc., and the top of described boiler (1) is communicated with an end of heat supply pipeline (3); The inlet of the other end of this heat supply pipeline (3) and radiator (2) joins; Steam trap (13) is equipped with in the outlet of radiator (2); The outlet of steam trap (13) is communicated with an end of back liquid pipeline (4); The other end of this back liquid pipeline (4) communicates with boiler (1); It is characterized in that: before the normal operation, need internal system is pumped into the negative pressure that absolute pressure is 7000-100pa, and in system, charge into working media (5); Tubing pump (12), magnetic valve (7) and two valves (f1), (f2) are housed on the described heat supply pipeline (3); Described two valves (f1), (f2) join with air collector (14), pressure vacuum gauge (10) respectively, and vavuum pump (6) is housed on this air collector (14); Valve (f3) is housed on the described back liquid pipeline (4); The other end of valve (f3) with add flow container (9) and link to each other.

2. a kind of vacuum evaporation heating system according to claim 1 is characterized in that: described working media (5) can be a water, also can be low boiling working fluids such as acetone, ethanol, methyl alcohol.

3. a kind of vacuum evaporation heating system according to claim 1 is characterized in that: described tubing pump (12) is in parallel with a bypass valve (f8).

4. a kind of vacuum evaporation heating system according to claim 1 is characterized in that: the outlet of described vavuum pump (6) and magnetic valve (7) all links to each other with fluid reservoir (8).