CN101818925B - Recovery device for steam condensation water - Google Patents

Recovery device for steam condensation water Download PDF

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Publication number
CN101818925B
CN101818925B CN201010157320XA CN201010157320A CN101818925B CN 101818925 B CN101818925 B CN 101818925B CN 201010157320X A CN201010157320X A CN 201010157320XA CN 201010157320 A CN201010157320 A CN 201010157320A CN 101818925 B CN101818925 B CN 101818925B
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water leg
pipeline
steam condensate
programmable logic
controller
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CN101818925A (en
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沈道永
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沈道永
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Abstract

The invention provides a recovery device for steam condensation water, belongs to the field of electromechanical technology, and solves the technical problems of high cost, low recovery heat, poor quality of the recovered steam condensation water and the like in a traditional recovery device for the steam condensation water. The recovery device for the steam condensation water is arranged between steam equipment and a hot water exchanger of a domestic hot water system and comprises a heat-insulating water collection tank and a hot water pump, wherein one end of the heat-insulating water collection tank is communicated with the steam equipment, and the other end of the heat-insulating water collection tank is connected with the hot water pump through a pipeline 1; the other end of the hot water pump is communicated with the hot water exchanger through a pipeline 2; the heat-insulating water collection tank is an open heat-insulating water collection tank; and a U-shaped water collection pipe is arranged between the heat-insulating water collection tank and the steam equipment. The recovery device has the advantages of simple structure, low cost, high recovery efficiency, easy control, high quality of the recovered steam condensation water and the like.

Description

A kind of retracting device of steam condensate (SC)
Technical field
The invention belongs to the mechanical & electrical technology field, relate to a kind of retracting device of steam condensate (SC), the device that particularly a kind of civil buildings reclamation of condensate water is utilized to the hot water supply system.
Background technology
Use the unit of steam in daily production use, to produce a large amount of steam condensate (SC)s, how to realize that effective recovery and the utilization to steam condensate (SC) is the problem that engineers and technicians study always.The recycling of steam condensate (SC) is not only energy-conservation but also economize on water, and is not only the response to national energy policy, has reduced the specific energy consumption cost simultaneously, is one and constantly brings forth new ideas and perfect engineering.
Heating and ventilating equipment and other heat exchanger of civil buildings such as hotel, office building, office building, hospital produce a large amount of steam condensate (SC)s below 100 ℃; Adopt conventional method to be recycled into boiler feed water at present mostly; Though boiler has been installed economizer mostly now; But as boiler replenishing water, adopt normal temperature soft water that the boiler flue waste heat is reclaimed, its energy recovery efficient is obviously still lower.Especially adopt the city thermal net to use vapour unit, steam condensate (SC) does not add recovery mostly for various reasons, directly discharging.Because steam condensate (SC) water quality is good, contains certain heat, and there is high economic benefit in this reclamation of condensate water utilization.
Through retrieval; Find Chinese patent (Granted publication number: CN2548050Y) disclose a kind of central heating user reclamation of condensate water use device; Comprise temporary water tank, big water storage tank, temperature controller, pumping controller, pump group flowmeter, domestic hot-water's circulating line and total blow-off line; It is characterized in that temperature controller joins with temporary water tank, big water storage tank, flowmeter and domestic hot-water's circulating line respectively through cable; The pump group controller joins with the pump group respectively through cable; The pump winding is between domestic hot-water's circulating line and big water storage tank, and the pump winding is on big water storage tank and branch line that the hot water user communicates, and pump group and flowmeter are serially connected in temporary water tank and greatly between the water storage tank.
This patent adopts the open type recovery method, collects with temporary water tank earlier, is delivered to big water storage tank again, is delivered to domestic hot-water's circulating line then, supplies the user to use.Although reach reclamation of condensate water to hot water supply system's purpose, still have certain defective, reclaim steam condensate (SC) that pressure is arranged because of open type when steam trap is discharged, can flash off a large amount of indirect steams; Store water storage tank into and be transported to hot-water heating system again, need secondary to carry, consume certain electric energy, and loss part heat; Big water storage tank is bigger than normal, and floor space is big, and construction costs is high, and general unit is difficult to promote; Lower because of the steam condensate (SC) pH value simultaneously, steam condensate (SC) is stored the back and is adopted whole or most of users of confession to use, and influences comfort to a certain extent.
Summary of the invention
The objective of the invention is to have the problems referred to above to existing technology, proposed a kind of retracting device of steam condensate (SC), this retracting device has the measured characteristics of steam condensate (SC) matter that heat is good, reclaim that reclaim.
The object of the invention can be realized through following technical proposal: a kind of retracting device of steam condensate (SC); Be arranged between gas utilization unit and hot water supply system's the hot water exchanger; Comprise insulation water leg and heat-exchanger pump, described insulation water leg one end is connected with gas utilization unit, and the other end links to each other with heat-exchanger pump through pipeline one; The described heat-exchanger pump other end is connected with hot water exchanger through pipeline two; It is characterized in that described insulation water leg is an open type insulation water leg, between insulation water leg and gas utilization unit, is provided with U type collector pipe.
The retracting device of this steam condensate (SC) is the reclamation of condensate water with uniform temperature that gas utilization unit is produced in the hot water supply system.The main operation principle of the retracting device of this steam condensate (SC) is following, and the steam condensate (SC) that gas utilization unit produces enters into the insulation water leg.Collect the steam condensate (SC) of insulation in the water leg under the effect of heat-exchanger pump, enter into hot water exchanger, hot water is provided to the hot water supply system.In the retracting device of this steam condensate (SC), the insulation water leg is an open type insulation water leg, and the gas in the steam condensate (SC) can prevent effectively that like this phenomenon of idle running from appearring in heat-exchanger pump by going out in the insulation water leg.Because the steam condensate (SC) that gas utilization unit produces has certain pressure, therefore, between insulation water leg and gas utilization unit, be provided with U type collector pipe.The steam condensate (SC) with pressure that gas utilization unit produces like this is discharged in the insulation water leg through ability release pressure behind this U type collector pipe more automatically, thereby has reduced the flash distillation of the indirect steam of steam condensate (SC), can improve and reclaim the thermal efficiency about 10%.Be designed to the insulation water leg open, the pressure that makes the whole recovery device is normal pressure, otherwise the whole recovery device will be regarded as special equipment, makes this retracting device need not to accept every year the forced examination of special equipment, saves cost.In addition, the volume of the insulation water leg in this device is less, is roughly 0.15~0.3 meter 3, concrete can calculating according to 1/10 of the per hour flow of actual steam condensed water, the height of insulation water leg is roughly 0.4 meter, makes like this to install to become more easy, satisfies the recovery of the steam condensate (SC) that various gas utilization units produce.
In the retracting device of above-mentioned steam condensate (SC), the liquid pH value that is provided with between described insulation water leg and the hot water exchanger in hot water exchanger is lower than the conveying mechanism one that setting value can be incubated water leg adding alkali lye for the moment from trend.
In the retracting device of above-mentioned steam condensate (SC); Described conveying mechanism one comprises ph controller, lye tank, magnetic valve one, flow control valve and PLC Programmable Logic Controller; The inductive probe of described ph controller is arranged in the hot water exchanger; And this ph controller links to each other with the PLC Programmable Logic Controller, and described lye tank links to each other with above-mentioned insulation water leg, and described magnetic valve one is arranged between lye tank and the insulation water leg; And this magnetic valve one links to each other with above-mentioned PLC Programmable Logic Controller, and described flow control valve is arranged between magnetic valve one and the lye tank.The pH value of sensing the liquid in the hot water exchanger when the inductive probe of ph controller is lower than setting value for the moment; Ph controller passes to the PLC Programmable Logic Controller with signal; The PLC Programmable Logic Controller is given a magnetic valve signal one by one again; Thereby opens solenoid valve one, the alkali lye in the lye tank enters in the insulation water leg through magnetic valve one, and the steam condensate (SC) that will add alkali lye through heat-exchanger pump is sent in the hot water exchanger; Improve the pH value of the liquid in the hot water exchanger, thereby reach national drinking water pH value standard.The pH value of sensing the liquid in the hot water exchanger when the inductive probe of ph controller a little more than setting value for the moment, the PLC Programmable Logic Controller is given a magnetic valve signal one by one, thereby closes magnetic valve one, stops in the insulation water leg, increasing alkali lye.Can effectively control the flow of alkali lye through flow control valve is set between magnetic valve one and lye tank, prevent that the alkali lye that adds is excessive.
In the retracting device of above-mentioned steam condensate (SC); Described insulation water leg also links to each other with a heat preservation storage water tank through pipeline three; Described heat preservation storage water tank also links to each other with above-mentioned pipeline two through pipeline four; On pipeline two, also be provided with target stream switch; On pipeline four, be provided with the steam condensate (SC) that when the liquid level in the insulation water leg surpasses setting value two, can will be incubated in the water leg and be transported to the conveying mechanism two in the heat preservation storage water tank, when the liquid level in the insulation water leg was lower than setting value five, conveying mechanism two can stop the steam condensate (SC) in the insulation water leg is transported in the heat preservation storage water tank automatically; On pipeline three, be provided with conveying mechanism three; When having certain flow, pipeline two opens target stream switch; And when the water level of insulation water leg is lower than setting value three; Conveying mechanism three can be transported to the steam condensate (SC) in the heat preservation storage water tank in the insulation water leg, and when the water level of insulation water leg was higher than setting value six, conveying mechanism three can stop the steam condensate (SC) in the heat preservation storage water tank is transported in the insulation water leg automatically.
In the retracting device of above-mentioned steam condensate (SC); Described conveying mechanism two comprises magnetic valve two, fluid level controller and the PLC Programmable Logic Controller that is arranged on the pipeline four; The liquid-level probe one of described fluid level controller is arranged in the insulation water leg; And this fluid level controller links to each other with above-mentioned PLC Programmable Logic Controller, and described magnetic valve two links to each other with the PLC Programmable Logic Controller.When the liquid-level probe one of fluid level controller is sensed the liquid level of insulation in the water leg and is surpassed setting value two; Give signal of PLC Programmable Logic Controller; The PLC Programmable Logic Controller passes to magnetic valve two to signal again; Thereby opens solenoid valve two, under the effect of heat-exchanger pump, the steam condensate (SC) in the insulation water leg is pressed in the heat preservation storage water tank.When the liquid-level probe one of fluid level controller is sensed the liquid level of insulation in the water leg and is lower than setting value five; Give signal of PLC Programmable Logic Controller; The PLC Programmable Logic Controller passes to magnetic valve two to signal again, thereby closes magnetic valve two, stops force feed steam condensate (SC) in heat preservation storage water tank.
In the retracting device of above-mentioned steam condensate (SC); Described conveying mechanism three comprises magnetic valve three, fluid level controller and the PLC Programmable Logic Controller that is arranged on the pipeline three; The liquid-level probe two of described fluid level controller is arranged in the insulation water leg; And this fluid level controller links to each other with the PLC Programmable Logic Controller, and described magnetic valve three links to each other with the PLC Programmable Logic Controller.In the retracting device of this steam condensate (SC), the setting height(from bottom) of heat preservation storage water tank is higher than the insulation water leg.When having certain flow, pipeline two opens target stream switch; And when the liquid-level probe two of fluid level controller is sensed the liquid level of insulation in the water leg and is lower than setting value three; Give signal of PLC Programmable Logic Controller, the PLC Programmable Logic Controller passes to magnetic valve three to signal again, thus opens solenoid valve three; Because the setting height(from bottom) of heat preservation storage water tank is higher than the insulation water leg, the steam condensate (SC) in the heat preservation storage water tank just can be got back in the insulation water leg automatically.When the liquid-level probe two of fluid level controller is sensed the liquid level of insulation in the water leg and is higher than setting value six; Give signal of PLC Programmable Logic Controller; The PLC Programmable Logic Controller passes to magnetic valve three to signal again; Thereby close magnetic valve three, the steam condensate (SC) in the heat preservation storage water tank just stops to flow back in the insulation water leg.
In the retracting device of above-mentioned steam condensate (SC), also be provided with in the described insulation water leg when the liquid level in the insulation water leg is lower than setting value four and can close the excessive low water level protection mechanism of heat-exchanger pump automatically.
In the retracting device of above-mentioned steam condensate (SC); Described excessive low water level protection mechanism comprises fluid level controller and PLC Programmable Logic Controller; The liquid-level probe three of described fluid level controller is arranged on the bottom of insulation water leg; And this fluid level controller links to each other with the PLC Programmable Logic Controller, and above-mentioned heat-exchanger pump also links to each other with the PLC Programmable Logic Controller.When the liquid-level probe three of fluid level controller is sensed the liquid level of insulation in the water leg and is lower than setting value four; Give signal of PLC Programmable Logic Controller; The PLC Programmable Logic Controller passes to heat-exchanger pump to signal again; Thereby close heat-exchanger pump, heat-exchanger pump dallies when preventing lack of water, influences the operate as normal of heat-exchanger pump.When the liquid-level probe three of fluid level controller is sensed the liquid level of insulation in the water leg and is higher than setting value four, give signal of PLC Programmable Logic Controller, the PLC Programmable Logic Controller passes to heat-exchanger pump to signal again, thereby makes heat-exchanger pump be in holding state.In addition, the liquid-level probe one of the above-mentioned fluid level controller of mentioning, liquid-level probe two and liquid-level probe three all are to be highly sensitive liquid-level probe, can guarantee that like this PLC Programmable Logic Controller can obtain signal accurately, timely.
In the retracting device of above-mentioned steam condensate (SC), also be provided with frequency-changing pressure stabilizing mechanism on the described pipeline two.
In the retracting device of above-mentioned steam condensate (SC), described frequency-changing pressure stabilizing mechanism comprises pressure sensor and frequency converter, and described pressure sensor is connected on the pipeline two, and described frequency converter is connected with pressure sensor.Pipeline of the common composition of above-mentioned pipeline one, pipeline two, pipeline three and the pipeline fourth class; Pressure sensor through being arranged on the pipeline three is learnt the pressure in the pipeline; Again pressure information is fed back in the frequency converter; Regulate through frequency converter, the pressure that remains in the pipeline is normal value.In addition, this frequency converter is setting pressure accurately, and makes the heat-exchanger pump soft start.
Compared with prior art, the retracting device of this steam condensate (SC) has the following advantages:
1, between insulation water leg and gas utilization unit, is provided with U type collector pipe, reduces the flash distillation of the indirect steam of steam condensate (SC), can improve and reclaim the thermal efficiency about 10%.
2, monitor in real time through the pH value in a pair of reclamation of condensate water process of conveying mechanism,, can add alkali lye automatically and cushion,, guarantee the quality of steam condensate (SC) to reach national domestic water standard when pH value is lower than setting value for the moment.
3, the insulation water leg of the open type in the retracting device of this steam condensate (SC) satisfies the recovery of the steam condensate (SC) of various gas utilization units generations because volume is little, highly lower; And adopt highly sensitive liquid-level probe; Realize instant the recycling, flow process is simple and direct, and cost is lower.
4, the retracting device of this steam condensate (SC) guarantees the pressure stability in the pipeline through frequency-changing pressure stabilizing mechanism, and has power savings.
5, the retracting device of this steam condensate (SC) is provided with lack of water, overtemperature, overpressure protection apparatus, guarantees the safe operation of whole recovery device.
Description of drawings
Fig. 1 is the schematic diagram of the retracting device of this steam condensate (SC).
Among the figure, 1, gas utilization unit; 2, hot water exchanger; 3, insulation water leg; 4, heat-exchanger pump; 5, U type collector pipe; 6, ph controller; 7, lye tank; 8, magnetic valve one; 9, PLC Programmable Logic Controller; 10, pipeline one; 11, pipeline two; 12, pipeline three; 13, pipeline four; 14, heat preservation storage water tank; 15, magnetic valve two; 16, fluid level controller; 17, magnetic valve three; 18, pressure sensor; 19, frequency converter; 20, pipeline five; 21, pipeline six; 22, one way stop peturn valve; 23, cold water source; 24, target stream switch; 25, temperature sensor; 26, flow control valve; 27, check-valves; 28, gate valve; 29, electro connecting pressure gauge; 30, pipeline seven.
The specific embodiment
Below be specific embodiment of the present invention and combine accompanying drawing, technical scheme of the present invention is done further to describe, but the present invention is not limited to these embodiment.
As shown in Figure 1; The retracting device of this steam condensate (SC); Be arranged between gas utilization unit 1 and hot water supply system's the hot water exchanger 2, comprise insulation water leg 3, heat-exchanger pump 4 and U type collector pipe 5, insulation water leg 3 one ends are connected with gas utilization unit 1 through pipeline 5 20; The other end links to each other with heat-exchanger pump 4 through pipeline 1, and heat-exchanger pump 4 other ends are connected with hot water exchanger 2 through pipeline 2 11.U type collector pipe 5 is arranged between insulation water leg 3 and the gas utilization unit 1, and in other words, U type collector pipe 5 is mounted on the pipeline 5 20.
The liquid pH value that between insulation water leg 3 and hot water exchanger 2, is provided with in hot water exchanger 2 is lower than the conveying mechanism one that setting value can be incubated water leg 3 adding alkali lye for the moment from trend.In the present embodiment, setting value one is 6.8.Particularly; Conveying mechanism one comprises ph controller 6, lye tank 7, magnetic valve 1, flow control valve 26 and PLC Programmable Logic Controller 9; The inductive probe of ph controller 6 is arranged in the hot water exchanger 2; And this ph controller 6 links to each other with PLC Programmable Logic Controller 9, and lye tank 7 links to each other with above-mentioned insulation water leg 3, and magnetic valve 1 is arranged between lye tank 7 and the insulation water leg 3; And this magnetic valve 1 links to each other with PLC Programmable Logic Controller 9, and flow control valve 26 is arranged between magnetic valve 1 and the lye tank 7.When the pH value of the liquid in the inductive probe of ph controller 6 is sensed hot water exchanger 2 is lower than 6.8; Ph controller 6 passes to PLC Programmable Logic Controller 9 with signal; PLC Programmable Logic Controller 9 is given one 8 one signals of magnetic valve again; Thereby opens solenoid valve 1, the alkali lye in the lye tank 7 enters in the insulation water leg 3 through magnetic valve 1, and the steam condensate (SC) that will add alkali lye through heat-exchanger pump 4 again is sent in the hot water exchanger 2; Improve the pH value of the liquid in the hot water exchanger 2, thereby reach national drinking water pH value standard.The pH value of the liquid in the inductive probe of ph controller 6 is sensed hot water exchanger 2 is a little more than 6.8; When roughly reaching 7.0; PLC Programmable Logic Controller 9 is given one 8 one signals of magnetic valve, thereby closes magnetic valve 1, and stopping to increase alkali lye in insulation water leg 3.Through the flow that flow control valve 26 can effectively be controlled alkali lye is set, prevent that the alkali lye that adds is excessive between magnetic valve 1 and lye tank 7.
Also link to each other with a heat preservation storage water tank 14 at insulation water leg 3 through pipeline 3 12; Heat preservation storage water tank 14 also links to each other with above-mentioned pipeline 2 11 through pipeline 4 13; On pipeline 2 11, also be provided with target stream switch 24; On pipeline 4 13, be provided with the steam condensate (SC) that when the liquid level in the insulation water leg 3 surpasses setting value two, can will be incubated in the water leg 3 and be transported to the conveying mechanism two in the heat preservation storage water tank 14; When the liquid level in the insulation water leg 3 was lower than setting value five, conveying mechanism two can stop the steam condensate (SC) in the insulation water leg 3 is transported in the heat preservation storage water tank 14 automatically; On pipeline 3 12, be provided with conveying mechanism three; When having certain flow, pipeline 2 11 opens target stream switch 24; And when the water level of insulation water leg 3 is lower than setting value three; Conveying mechanism three can be transported to the steam condensate (SC) in the heat preservation storage water tank 14 in the insulation water leg 3, and when the water level of insulation water leg 3 was higher than setting value six, conveying mechanism three can stop the steam condensate (SC) in the heat preservation storage water tank 14 is transported in the insulation water leg 3 automatically.
Particularly; Conveying mechanism two comprises magnetic valve 2 15, fluid level controller 16 and the PLC Programmable Logic Controller 9 that is arranged on the pipeline 4 13; The liquid-level probe one of fluid level controller 16 is arranged in the insulation water leg 3; And this fluid level controller 16 links to each other with above-mentioned PLC Programmable Logic Controller 9, and magnetic valve 2 15 links to each other with PLC Programmable Logic Controller 9.In the present embodiment, setting value two is 90% of insulation water leg 3 volumes, and setting value five is 13% of insulation water leg 3 volumes.When the liquid-level probe one of fluid level controller 16 sense the liquid level of insulation in the water leg 3 surpass insulation water leg 3 volumes 90% the time; Give 9 one signals of PLC Programmable Logic Controller; PLC Programmable Logic Controller 9 passes to magnetic valve 2 15 to signal again; Thereby opens solenoid valve 2 15, under the effect of heat-exchanger pump 4, the steam condensate (SC) in the insulation water leg 3 is pressed in the heat preservation storage water tank 14.When the liquid-level probe one of fluid level controller 16 sense the liquid level of insulation in the water leg 3 be lower than insulation water leg 3 volumes 13% the time; Give 9 one signals of PLC Programmable Logic Controller; PLC Programmable Logic Controller 9 passes to magnetic valve 2 15 to signal again; Thereby close magnetic valve 2 15, stop force feed steam condensate (SC) in heat preservation storage water tank 14.
Conveying mechanism three comprises magnetic valve 3 17, fluid level controller 16 and the PLC Programmable Logic Controller 9 that is arranged on the pipeline 3 12; The liquid-level probe two of fluid level controller 16 is arranged in the insulation water leg 3; And this fluid level controller 16 links to each other with PLC Programmable Logic Controller 9, and described magnetic valve 3 17 links to each other with PLC Programmable Logic Controller 9.In the present embodiment; Setting value three is 20% of insulation water leg 3 volumes, and setting value six is 30% of insulation water leg 3 volumes, and the setting height(from bottom) of heat preservation storage water tank 14 is higher than insulation water leg 3; When steam condensate (SC) has certain flow on pipeline 2 11; 24 adhesives of target stream switch, simultaneously when the liquid-level probe two of fluid level controller 16 sense liquid level in the insulation water leg 3 be lower than insulation water leg 3 volumes 20% the time, to 9 one signals of PLC Programmable Logic Controller; PLC Programmable Logic Controller 9 passes to magnetic valve 3 17 to signal again; Thereby opens solenoid valve 3 17, because the setting height(from bottom) of heat preservation storage water tank 14 is higher than insulation water leg 3, the steam condensate (SC) in the heat preservation storage water tank 14 just can be got back in the insulation water leg 3 automatically.When the liquid-level probe two of fluid level controller 16 sense the liquid level of insulation in the water leg 3 be higher than insulation water leg 3 volumes 30% the time; Give 9 one signals of PLC Programmable Logic Controller; PLC Programmable Logic Controller 9 passes to magnetic valve 3 17 to signal again; Thereby close magnetic valve 3 17, the steam condensate (SC) in the heat preservation storage water tank 14 just stops to flow back in the insulation water leg 3.
In insulation water leg 3, also be provided with when the liquid level in the insulation water leg 3 is lower than setting value four and can close the excessive low water level protection mechanism of heat-exchanger pump 4 automatically.In the present embodiment, setting value four is 5% of insulation water leg 3 volumes.Particularly; Excessive low water level protection mechanism comprises fluid level controller 16 and PLC Programmable Logic Controller 9; The liquid-level probe three of fluid level controller 16 is arranged on the bottom of insulation water leg 3, and this fluid level controller 16 links to each other with PLC Programmable Logic Controller 9, and heat-exchanger pump 4 also links with PLC Programmable Logic Controller 9.When the liquid-level probe three of fluid level controller 16 sense the liquid level of insulation in the water leg 3 be lower than insulation water leg 3 volumes 5% the time; Give 9 one signals of PLC Programmable Logic Controller; PLC Programmable Logic Controller 9 passes to heat-exchanger pump 4 to signal again; Thereby close heat-exchanger pump 4, heat-exchanger pump 4 dallies when preventing lack of water, influences the operate as normal of heat-exchanger pump 4.When the liquid-level probe three of fluid level controller 16 sense the liquid level of insulation in the water leg 3 be higher than insulation water leg 3 volumes 5% the time; Give 9 one signals of PLC Programmable Logic Controller; PLC Programmable Logic Controller 9 passes to heat-exchanger pump 4 to signal again; Thereby make heat-exchanger pump 4 be in holding state, power is provided for the retracting device of this steam condensate (SC).
On pipeline 2 11, also be provided with check-valves 27 and gate valve 28.In the present embodiment; Fluid level controller 16 also has liquid-level probe four, and when liquid-level probe four was sensed the liquid level of insulation in the water leg 3 and is higher than setting value seven, fluid level controller 16 passed to PLC Programmable Logic Controller 9 with signal; PLC Programmable Logic Controller 9 is opened heat-exchanger pump 4 again; Steam condensate (SC) in the insulation water leg 3 enters into hot water exchanger 2 through check-valves 27, gate valve 28 along pipeline 2 11 under the effect of heat-exchanger pump 4, supply the user to use.When liquid-level probe four was sensed the liquid level of insulation in the water leg 3 and is lower than setting value eight, fluid level controller 16 passed to PLC Programmable Logic Controller 9 with signal, and PLC Programmable Logic Controller 9 passes to frequency converter 19 to signal, and frequency converter 19 cuts out heat-exchanger pump 4 again.Setting value seven is 80% of insulation water leg 3 volumes in the present embodiment, and setting value eight is 15% of insulation water leg 3 volumes.Gate valve 28 is set in pipeline 2 11, makes things convenient for the maintenance of the recovery of this steam condensate (SC).
On pipeline 2 11, also be provided with frequency-changing pressure stabilizing mechanism, particularly, frequency-changing pressure stabilizing mechanism comprises pressure sensor 18 and frequency converter 19, being connected on the pipeline 2 11 of pressure sensor 18, and described frequency converter 19 is connected with pressure sensor 18.Pipeline of common composition such as above-mentioned pipeline 1, pipeline 2 11, pipeline 3 12 and pipeline 4 13; Pressure sensor 18 through being arranged on the pipeline 3 12 is learnt the pressure in the pipeline; Again pressure information is fed back in the frequency converter 19; Regulate through frequency converter 19, the pressure that remains in the pipeline is normal value.In addition, this frequency converter 19 is setting pressure accurately, and makes heat-exchanger pump 4 soft starts.
On pipeline 2 11, also be provided with electro connecting pressure gauge 29; This electro connecting pressure gauge 29 is to link to each other with above-mentioned PLC Programmable Logic Controller 9; When electro connecting pressure gauge 29 learns that pressure in the pipeline surpasses setting value; Pass the signal along to PLC Programmable Logic Controller 9 and be in holding state, effectively protect the retracting device of this steam condensate (SC).
After the stram condenser retracting device was installed, the equipment of former hot-water heating system can remain unchanged, and operation still.
In the present embodiment, on hot water exchanger 2, also be provided with temperature sensor 25, the inductive probe of temperature sensor 25 is arranged in the hot water exchanger 2, and this temperature sensor 25 also links to each other with above-mentioned PLC Programmable Logic Controller 9.On temperature sensor 25, set a numerical value; Such as 50 ℃; When the temperature in the inductive probe of temperature sensor 25 is sensed hot water exchanger 2 surpasses 50 ℃; Temperature sensor 25 will pass to PLC Programmable Logic Controller 9 to signal, and PLC Programmable Logic Controller 9 passes to magnetic valve 2 15 to signal again, thus opens solenoid valve 2 15.Under the effect of heat-exchanger pump 4, the steam condensate (SC) in the insulation water leg 3 is pressed in the heat preservation storage water tank 14.That is to say, when the liquid level of insulation in the water leg 3 is higher than 90% or when be higher than 50 ℃ in the hot water exchanger 2, magnetic valve 2 15 just can be opened automatically, is sent in the heat preservation storage water tank 14 and keeps in being incubated steam condensate (SC) in the water leg 3.
In addition, hot water exchanger 2 links to each other with a cold water source 23 through pipeline 6 21, and one way stop peturn valve 22 is installed on pipeline 6 21.When heat-exchanger pump 4 was not started working, the cold water in the cold water source 23 entered in the hot water exchanger 2 through one way stop peturn valve 22, and the heater in the hot water exchanger 2 is heated to certain temperature with cold water, used to supply with the user.After heat-exchanger pump 4 is started working; The pipeline 2 11 that is connected with hot water exchanger 2 can produce a pressure; Under the effect of this pressure, the one way stop peturn valve 22 that is arranged between cold water source 23 and the hot water exchanger 2 is closed, cold water just can't enter into hot water exchanger 2.Also be connected with pipeline 7 30 on the hot water exchanger 2; This pipeline 7 30 is to supply with the user to use, and when user's water consumption was big, the steam condensate (SC) that heat-exchanger pump 4 will be incubated in the water leg 3 was pressed in the big hot water exchanger 2; Simultaneously; Cold water in the cold water source 23 also enters into hot water exchanger 2, and the heater in the hot water exchanger 2 is heated to certain temperature with the mixing water of steam condensate (SC) and cold water composition, uses to supply with the user.
The retracting device of this steam condensate (SC) is the reclamation of condensate water with uniform temperature that gas utilization unit 1 is produced in the hot water supply system.The main operation principle of the retracting device of this steam condensate (SC) is following, and under the effect of heat-exchanger pump 4, the steam condensate (SC) that gas utilization unit 1 produces enters into insulation water leg 3.Collect the steam condensate (SC) of insulation in the water leg 3 under the effect of heat-exchanger pump 4, enter into hot water exchanger 2, hot water is provided to the hot water supply system.In the retracting device of this steam condensate (SC), insulation water leg 3 is open type insulation water leg 3, and the gas in the steam condensate (SC) can prevent effectively that like this phenomenon of idle running from appearring in heat-exchanger pump 4 by going out in the insulation water leg 3.Because the steam condensate (SC) that gas utilization unit 1 produces has certain pressure, therefore, between insulation water leg 3 and gas utilization unit 1, be provided with U type collector pipe 5.Ability release pressure behind this U type collector pipe 5 of steam condensate (SC) process with pressure that gas utilization unit 1 produces like this is discharged in the insulation water leg 3 more automatically, thereby has reduced the flash distillation of the indirect steam of steam condensate (SC), can improve and reclaim the thermal efficiency about 10%.Be designed to insulation water leg 3 open, the pressure that makes the whole recovery device is normal pressure, otherwise the whole recovery device will be regarded as special equipment, makes this retracting device need not to accept every year the forced examination of special equipment, saves cost.In addition, the volume of the insulation water leg 3 in this device is less, is roughly 0.15~0.3 meter 3, concrete can calculating according to 1/10 of the per hour flow of actual steam condensed water, in the present embodiment, the volume of insulation water leg 3 is 0.2 meter 3, the height of insulation water leg 3 is roughly 0.4 meter.Make like this to install to become more easy, satisfy the recovery of the steam condensate (SC) of various gas utilization units 1 generations.
In the present embodiment; The existing product of fluid level controller 16 for buying on the market; Its structure is not given unnecessary details; And the liquid-level probe one of this fluid level controller 16, liquid-level probe two, liquid-level probe three and liquid-level probe four all are to be highly sensitive liquid-level probe, can guarantee that like this PLC Programmable Logic Controller 9 can obtain signal accurately, timely.In addition, the PLC Programmable Logic Controller 9 that relates in the present embodiment, temperature sensor 25 and electro connecting pressure gauge 29 are the existing product that can buy on the market, and its structure is not given unnecessary details.
The reclamation of condensate water amount and the Economic and Efficiency Analysis of the retracting device of this steam condensate (SC):
In the building, ward of more than 30,000 a square metre of construction area and the outpatient service ward complex building of nearly 30,000 square metres of construction areas retracting device was installed respectively in 2008,2009, the reclamation of condensate water amount and the Economic and Efficiency Analysis of two cover steam condensate (SC) devices are following:
Geographical position: Linhai City Taizhou, Zhejiang Province hospital
Temperature condition: the hottest month of summer, outdoor mean temperature was 28.5 ℃
The coldest month of winter, outdoor mean temperature was 4 ℃
Water temperature condition: 19 ℃ of annuals
Average 25 ℃ of summer
Average 13 ℃ of winter
Various reclamation of condensate water heats and water yield summary sheet
Can know that from last table data year recycling water is 11960 tons, the waste heat of recovery can be saved 132 tons in raw coal, accounts for two buildings with steam heat 5.7%.Can save 12.5 ten thousand yuan (market price in 2009).
Specific embodiment described herein only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used 1, gas utilization unit morely; 2, hot water exchanger; 3, insulation water leg; 4, heat-exchanger pump; 5, U type collector pipe; 6, ph controller; 7, lye tank; 8, magnetic valve one; 9, PLC Programmable Logic Controller; 10, pipeline one; 11, pipeline two; 12, pipeline three; 13, pipeline four; 14, heat preservation storage water tank; 15, magnetic valve two; 16, fluid level controller; 17, magnetic valve three; 18, pressure sensor; 19, frequency converter; 20, pipeline five; 21, pipeline six; 22, one way stop peturn valve; 23, cold water source; 24, target stream switch; 25, temperature sensor; 26, flow control valve; 27, check-valves; 28, gate valve; 29, electro connecting pressure gauge; 30, term such as pipeline seven, but do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; It all is contrary with spirit of the present invention being construed to any additional restriction to them.

Claims (10)

1. the retracting device of a steam condensate (SC); Be arranged between gas utilization unit (1) and hot water supply system's the hot water exchanger (2); Comprise insulation water leg (3) and heat-exchanger pump (4), described insulation water leg (3) one ends are connected with gas utilization unit (1), and the other end links to each other with heat-exchanger pump (4) through pipeline one (10); Described heat-exchanger pump (4) other end is connected with hot water exchanger (2) through pipeline two (11); It is characterized in that described insulation water leg (3) is provided with U type collector pipe (5) for open type insulation water leg (3) between insulation water leg (3) and gas utilization unit (1).
2. the retracting device of steam condensate (SC) according to claim 1; It is characterized in that the liquid pH value that is provided with between described insulation water leg (3) and the hot water exchanger (2) in hot water exchanger (2) is lower than the conveying mechanism one that setting value can be incubated water leg (3) adding alkali lye for the moment from trend.
3. the retracting device of steam condensate (SC) according to claim 2; It is characterized in that; Described conveying mechanism one comprises ph controller (6), lye tank (7), magnetic valve one (8), flow control valve and PLC Programmable Logic Controller (9); The inductive probe of described ph controller (6) is arranged in the hot water exchanger (2); And this ph controller (6) links to each other with PLC Programmable Logic Controller (9), and described lye tank (7) links to each other with above-mentioned insulation water leg (3), and described magnetic valve one (8) is arranged between lye tank (7) and the insulation water leg (3); And this magnetic valve one (8) links to each other with above-mentioned PLC Programmable Logic Controller (9), and described flow control valve is arranged between magnetic valve one (8) and the lye tank (7).
4. according to the retracting device of claim 1 or 2 or 3 described steam condensate (SC)s; It is characterized in that; Described insulation water leg (3) also links to each other with a heat preservation storage water tank (14) through pipeline three (12); Described heat preservation storage water tank (14) also links to each other with above-mentioned pipeline two (11) through pipeline four (13); On pipeline two (11), also be provided with target stream switch (24); On pipeline four (13), be provided with the steam condensate (SC) that when the liquid level in the insulation water leg (3) surpasses setting value two, can will be incubated in the water leg (3) and be transported to the conveying mechanism two in the heat preservation storage water tank (14), when the liquid level in the insulation water leg (3) was lower than setting value five, conveying mechanism two can stop the steam condensate (SC) in the insulation water leg (3) is transported in the heat preservation storage water tank (14) automatically; On pipeline three (12), be provided with conveying mechanism three; When having certain flow, pipeline two (11) opens target stream switch (24); And when the water level of insulation water leg (3) is lower than setting value three; Conveying mechanism three can be transported to the steam condensate (SC) in the heat preservation storage water tank (14) in the insulation water leg (3), and when the water level of insulation water leg (3) was higher than setting value six, conveying mechanism three can stop the steam condensate (SC) in the heat preservation storage water tank (14) is transported in the insulation water leg (3) automatically.
5. the retracting device of steam condensate (SC) according to claim 4; It is characterized in that; Described conveying mechanism two comprises magnetic valve two (15), fluid level controller (16) and the PLC Programmable Logic Controller (9) that is arranged on the pipeline four (13); The liquid-level probe one of described fluid level controller (16) is arranged in insulation water leg (3), and this fluid level controller (16) links to each other with above-mentioned PLC Programmable Logic Controller (9), and described magnetic valve two (15) links to each other with PLC Programmable Logic Controller (9).
6. the retracting device of steam condensate (SC) according to claim 4; It is characterized in that; Described conveying mechanism three comprises magnetic valve three (17), fluid level controller (16) and the PLC Programmable Logic Controller (9) that is arranged on the pipeline three (12); The liquid-level probe two of described fluid level controller (16) is arranged in insulation water leg (3), and this fluid level controller (16) links to each other with PLC Programmable Logic Controller (9), and described magnetic valve three (17) links to each other with PLC Programmable Logic Controller (9).
7. according to the retracting device of claim 1 or 2 or 3 described steam condensate (SC)s, it is characterized in that, also be provided with in the described insulation water leg (3) when the liquid level in the insulation water leg (3) is lower than setting value four and can close the excessive low water level protection mechanism of heat-exchanger pump (4) automatically.
8. the retracting device of steam condensate (SC) according to claim 7; It is characterized in that; Described excessive low water level protection mechanism comprises fluid level controller (16) and PLC Programmable Logic Controller (9); The liquid-level probe three of described fluid level controller (16) is arranged on the bottom of insulation water leg (3), and this fluid level controller (16) links to each other with PLC Programmable Logic Controller (9), and above-mentioned heat-exchanger pump (4) also links to each other with PLC Programmable Logic Controller (9).
9. according to the retracting device of claim 1 or 2 or 3 described steam condensate (SC)s, it is characterized in that, also be provided with frequency-changing pressure stabilizing mechanism on the described pipeline two (11).
10. the retracting device of steam condensate (SC) according to claim 9; It is characterized in that; Described frequency-changing pressure stabilizing mechanism comprises pressure sensor (18) and frequency converter (19); Described pressure sensor (18) is connected on the pipeline two (11), and described frequency converter (19) is connected with pressure sensor (18).
CN201010157320XA 2010-04-28 2010-04-28 Recovery device for steam condensation water Expired - Fee Related CN101818925B (en)

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CN103292378A (en) * 2013-05-27 2013-09-11 盛嘉军 Recovery method and device for boiler waste water and waste heat of heat supply network
CN103574727B (en) * 2013-11-09 2016-01-06 七台河宝泰隆圣迈煤化工有限责任公司 Industrial steam low-temperature waste heat reclaims energy-saving safe comprehensive utilization device
CN104667561B (en) * 2013-12-02 2016-03-30 逸盛大化石化有限公司 A kind of vapor-recovery system and technique thereof
CN104048353B (en) * 2014-06-06 2017-03-22 何宗衡 Transportation and distribution flow balance control device and using method thereof

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CN201059546Y (en) * 2007-07-05 2008-05-14 王嘉贤 Device for recycling and transmitting device in enclosed type high-temperature condensate water and water collection pot
CN201209852Y (en) * 2008-05-17 2009-03-18 卢雪银 Dual circulation closed condensate water recovery device
CN201335372Y (en) * 2008-10-24 2009-10-28 华东师范大学 Condensed water recovery device of steam system
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