CN203324212U - Device for determining engineering acid dew point of boiler flue gas - Google Patents
Device for determining engineering acid dew point of boiler flue gas Download PDFInfo
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- CN203324212U CN203324212U CN2013204227208U CN201320422720U CN203324212U CN 203324212 U CN203324212 U CN 203324212U CN 2013204227208 U CN2013204227208 U CN 2013204227208U CN 201320422720 U CN201320422720 U CN 201320422720U CN 203324212 U CN203324212 U CN 203324212U
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Abstract
The utility model discloses a device for determining an engineering acid dew point of boiler flue gas. The device for determining the engineering acid dew point of the boiler flue gas comprises a heat exchanger and a temperature control water tank. The heat exchanger is a cylindrical structure which is composed of an inner layer and an outer layer in a sleeved mode, one end of the inner layer and the corresponding end of the outer layer are communicated, the outer layer of one end of the inner layer and the outer layer of the same end of the outer layer are communicated with a water inlet of the temperature control water tank through a pipeline, and the inner layer of one end of the inner layer and the inner layer of the same end of the outer layer are communicated with a water outlet of the temperature control water tank through a pipeline, a flow meter, a water pump and a water outlet valve, and the flow meter, the water pump and the water outlet valve are arranged on the pipeline. The water inlet of the temperature control water tank is further communicated with a water supplement pipeline, a heat exchanger wall temperature sensor is arranged on the outer wall of the heat exchanger, and an inlet water temperature sensor and an outlet water temperature sensor are arranged on the pipeline connected with the water inlet of the temperature control water tank and the pipeline connected with the water outlet of the temperature control water tank respectively. A heating unit is arranged in the temperature control water tank, and the heat exchanger wall temperature sensor, the inlet water temperature sensor, the outlet water temperature sensor and the heating unit are connected with a control system of the temperature control water tank. The device for determining the engineering acid dew point of the boiler flue gas can accurately measure the temperature critical point, namely the engineering acid dew point, wherein the temperature critical point indicates that remarkable changes of heat exchange performance of the heat exchanger happen due to the fact that the temperature of the wall surface of the heat exchanger is excessively low.
Description
Technical field
The utility model relates to the energy and power engineering engineering field, especially a kind of for determine the device of the heat exchange property sudden change critical temperature (engineering acid dew point) of heat interchanger in the boiler tail flue gas UTILIZATION OF VESIDUAL HEAT IN.
Background technology
In every loss of boiler, flue gas loss is maximum one, test shows, 10～20 ℃ of the every risings of exhaust gas temperature, boiler thermal output reduces approximately 0.6%～1%, corresponding many consumption coals 2～3g/KWh, therefore take full advantage of residual heat from boiler fume, and the reduce exhaust gas temperature has important practical significance for energy-saving and emission-reduction.
Yet, along with the utilization of boiler flue tail flue gas waste heat, it is lower that exhaust gas temperature can become.Along with the reduction gradually of flue-gas temperature, sulfureous in flue gas acid vapor and water vapour dewfall, cause that heat exchanger wall adheres to increasing wet ash, and the heat interchanger heat exchange property is variation gradually.Evidence, exist and cause the zero point of heat exchange property marked change because wall surface temperature is too low, and the flue gas acid dew point that this temperature spot calculates lower than theory is called for short the engineering acid dew point.Measurement accuracy engineering acid dew point has important practical significance in engineering practice, can guarantee under the reliable prerequisite of heat interchanger, determines that the flue gas smoke discharging residual heat utilizes to greatest extent, instructs the design of waste heat utilization equipment.
Forming wet ash due to the acid in flue gas and water dewfall and dust stratification coupling synergy is the major reason that causes the heat interchanger heat exchange efficiency to descend, and current research mainly concentrates in the calculating and experimental technique of dew point.
" the flue gas acid dew point computing method compare and analyze " (boiler technology, 2009) comparative analysis domestic and international flue gas acid dew point computing method commonly used, yet the result that these computing method draw differs greatly, the deviation maximum reaches two, 30 degrees centigrade, little to the directive significance of engineering practice.
Simultaneously, although developed now various dew point testing instruments, reference: Rui Tesama, the latest developments of miniaturization humidity sensor-transduction technology summary, sensor and actuator A: physical process, (2002.96 2 – 3): p.196-210(Rittersma, Z.M., Recent achievements in miniaturised humidity sensors-a review of transduction techniques.Sensors and Actuators A:Physical, (2002.96 2 – 3): p.196-210), but due to the residing boiler flue circumstance complication of heat interchanger, particularly be subject to grey impact serious, existing dew point testing instrument is difficult to be applied directly to the flue environment, allow to obtain result, measurement result also inevitably is subject in flue the impact of ash and inaccurate.
In order accurately to obtain acid dew point and the water dew point in flue gas, domestic a lot of experts also are studied." the visual experimental study of flue gas acid dew point " (thermal power generation, 2011) have proposed a kind of visual test method, and boiler smoke is directly introduced to transparent test section, intuitively observe the dewfall situation of flue gas in exchanger tube wall.Although it is comparatively directly perceived that the method is observed, but because needs change the residing environment of flue gas, wind speed and pressure all can change, the dewfall characteristic in flue may not be consistent with it for the dewfall characteristic of flue gas in test section, simultaneously, adopt macroscopic method, also be difficult to accurately observe the dewfall situation on water wall in how grey environment.
" functional development of image-type dew point measurement instrument " (analysis and testing technology and instrument, 2000) proposed a kind of flue gas dew point surveying instrument that adopts sensor to be surveyed minute surface dewfall situation, also there is the problem that measurement environment is different from the flue environment in this instrument.And, at the boiler flue split shed of actual motion connecting test equipment, in operation, having difficulties, these measuring methods are not suitable for rig-site utilization in engineering.
For these reasons, because ash content in boiler smoke is large, traditional dew point testing method is difficult to accurately obtain dew point, and in boiler flue, temperature is high, closure is strong, be difficult to directly be observed, so also there is no at present well to determine the suddenly change method and apparatus of critical temperature (engineering acid dew point) of the heat exchange property of heat interchanger, still mainly rule of thumb designed in engineering design.This flue gas that both had been unfavorable for waste heat takes full advantage of, and may bring potential safety hazard again.
The utility model content
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, provide a kind of for determining the device of boiler smoke engineering acid dew point, it does not need to measure dew point, the critical temperature (engineering acid dew point) but the heat exchange property that obtains heat interchanger by calculating and observe the coefficient of heat transfer suddenlys change, thus overcome the defect that the result that needs to measure dew point in the past and bring is subject to the impact of ash in flue gas.
In long-term engineering practice and research work, the applicant finds to follow the appearance of smoke condensation phenomenon, and the heat interchanger coefficient of heat transfer can be undergone mutation.Analyze its reason, when heat interchanger is operated in higher temperature, the H in boiler flue
2O and H
2SO
4With vapor form, exist, solid particle is attached on heat exchanger wall with the form of dry ash, and now, the impact of the heat exchange efficiency of the deposition heat exchanger of ash is little.When flue-gas temperature during lower than uniform temperature (sulphuric acid dew point), H
2SO
4Steam starts dewfall to be separated out and is attached on the heat interchanger wall, when temperature further reduces, and while reaching water dew point, H
2O steam starts to separate out.Under the acting in conjunction of sulfuric acid, water and ash, can form wet grieshoch on the heat interchanger wall, have a strong impact on the heat exchange efficiency of heat interchanger.
Based on the above-mentioned theory analysis, the utility model adopts following technical proposals:
A kind of for determining the device of boiler smoke engineering acid dew point, comprise heat interchanger and temperature controlled water tank, described heat interchanger is the barrel-shaped structure communicated by inside and outside double-deck suit and a two-layer end, the skin of two-layer same side communicates with the water inlet of temperature controlled water tank by pipeline, and internal layer communicates with the water delivering orifice of temperature controlled water tank through pipeline and the flowmeter, water pump, the outlet valve that are arranged on this pipeline; The water inlet of described temperature controlled water tank also is communicated with the moisturizing pipeline, and described heat interchanger outer wall is provided with the heat exchanger wall temperature sensor, is respectively equipped with inflow temperature sensor and leaving water temperature sensor on the pipeline be connected with the temperature controlled water tank entery and delivery port; Be provided with heating unit in temperature controlled water tank, described heat exchanger wall temperature sensor, inflow temperature sensor, leaving water temperature sensor and heating unit are connected with the control system of temperature controlled water tank respectively.
Described heat interchanger comprises inner tube, outer tube, water inlet pipe and outlet conduit, described inner and outer tubes are set in together, inner first water stream channel that forms of inner tube, between outer tube and inner tube, there is space to form the second water stream channel, described inlet channel and outlet conduit all are positioned at the first end of heat interchanger, and at first end, inlet channel communicates with the first water stream channel, outlet conduit communicates with the second water stream channel, and the outer tube port sealing by fusing of first end is on the inner tube periphery; The other end of described heat interchanger is the second end, the outer tube end-enclosed of the second end, and inner tube is open ended, and the first water stream channel and the second water stream channel communicate.
Described outer tube is not flange-cooled light pipe or flange-cooled various extended surface heat-transfer pipe.
Described temperature controlled water tank comprises casing, control system, heating unit, water inlet, water delivering orifice, overflow vent, moisturizing pipeline, water supplement port valve and outlet valve, described water delivering orifice is arranged at the casing side near the place, bottom, water inlet is positioned at casing top, overflow vent is positioned at the casing side near tip position, set-up of control system is on casing one side, heating unit is arranged in casing, heating unit is electrically connected to control system, water outlet is provided with outlet valve, water inlet also is provided with the moisturizing pipeline, and the moisturizing pipeline is provided with the water supplement port valve.
Described control system comprises power supply, temperature controller, relay, data collecting instrument and pump switch, and wherein, described temperature controller, relay, data collecting instrument and pump switch are connected with power supply respectively; Described heat exchanger wall temperature sensor is connected with described temperature controller respectively with relay, and relay also is connected with heating unit; Described pump switch is connected between power supply and water pump; Described leaving water temperature sensor is connected with described data collecting instrument respectively with described inflow temperature sensor.
Described water supplement port valve and outlet valve are gate valve or variable valve.
The beneficial effects of the utility model are, because having utilized smoke condensation, this device can cause heat interchanger heat exchange property this characteristics of suddenling change, this device does not need to measure dew point, the critical temperature (engineering acid dew point) but the heat exchange property that obtains heat interchanger by calculating and observe the coefficient of heat transfer suddenlys change, thus overcome the defect that the result that needs to measure dew point in the past and bring is subject to the impact of ash in flue gas.
The utility model does not need the flue gas in flue is transferred in experimental provision and measured, but directly in the flue environment, is measured, and makes measurement result objective reality more.And, when adopting the single tube mode to measure, do not need boiler flue is transformed, greatly simplified the difficulty that test platform is built.
The accompanying drawing explanation
Fig. 1 is that device of the present utility model is used structural representation;
Fig. 2 is the control system structural representation used in the utility model embodiment;
Fig. 3 be in the utility model embodiment under different Reynolds number, the temperature variant trend map of Nu Xier number.
Wherein, 1. heat interchanger, 2. temperature controlled water tank, 3. anemometer detector, 4. flue gas analyzer, 5. flowmeter, 6. water pump, 7. inflow temperature sensor, 8. leaving water temperature sensor, 9. heat exchanger wall temperature sensor, 10. boiler flue wall, 11. inner tube, 12. outer tube, 13. inlet channel, 14. outlet conduit, 21. casing, 22. control system, 23. heating unit, 24. water inlet, 25. water delivering orifice, 26. overflow vent, 27. water supplement port valve, 28. outlet valve, 29. moisturizing pipeline, 221. power supply, 222. temperature controller, 223. relay, 224. data collecting instrument, 225. pump switch.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
The utility model has mainly utilized the coefficient of heat transfer of heat interchanger when wet grieshoch appears in heat exchanger surface can produce these characteristics of significant change, determine the heat exchange property sudden change critical temperature (engineering acid dew point) of heat interchanger by the variation of observing the heat interchanger coefficient of heat transfer, thereby instruct actual engineering design, avoid heat interchanger to work under the state of the low coefficient of heat transfer.
In embodiment, control the temperature of chilled water in water tank according to the measured value of heat interchanger wall temperature with temperature controlled water tank, reach the effect of stablizing the heat interchanger wall temperature, in order to set as required the heat interchanger wall temperature, thus the coefficient of heat transfer of heat interchanger while measuring various heat exchange wall temperature.During measurement, first chilled water is set in to higher initial temperature, heat interchanger is operated under higher wall temperature condition, the dry ash amount deposited along with the heat interchanger wall constantly increases, the coefficient of heat transfer slow decreasing of heat interchanger, when the heat exchanger surface dry ash deposits to state of saturation, the dry ash amount can not increase again, and the coefficient of heat transfer of heat interchanger also no longer changes; After the coefficient of heat transfer of heat interchanger is stable, start to reduce gradually the heat interchanger wall temperature by control device, when the heat interchanger wall temperature suddenlys change critical temperature (engineering acid dew point) higher than heat exchange property, the dry ash state of heat exchanger surface can not change, and the heat interchanger coefficient of heat transfer significant change can not occur; Keep and reduce the heat interchanger wall temperature, when wall temperature drops to heat exchange property sudden change critical temperature (engineering acid dew point), the dry ash of heat exchanger surface can become the wet ash be bonded on the heat interchanger wall because of the generation of dewfall in flue gas, and the coefficient of heat transfer of heat interchanger sharply descends.By observing the variation of the heat interchanger coefficient of heat transfer, can obtain the heat exchange property sudden change critical temperature (engineering acid dew point) of heat interchanger.
As shown in Figure 1, in the present embodiment, the device of the heat exchange property of definite heat interchanger sudden change critical temperature (engineering acid dew point) comprises heat interchanger 1, temperature controlled water tank 2, anemometer detector 3, flue gas analyzer 4, flowmeter 5, water pump 6, inflow temperature sensor 7, leaving water temperature sensor 8 and heat exchanger wall temperature sensor 9.Temperature controlled water tank 2 is connected with heat interchanger 1 and passes through water pump 6, flowmeter 5 to described heat interchanger 1 water supply, and inflow temperature sensor 7, leaving water temperature sensor 8 and heat exchanger wall temperature sensor 9 are connected with temperature controlled water tank 2 respectively.
Temperature controlled water tank 2 is controlled wall surface temperature by the temperature of controlling chilled water, by the design temperature of temperature controlled water tank, is T
0, establishing wall surface temperature is T
w, the control target is T
w=T
0.In work, temperature controlled water tank 1 is according to the temperature data T of heat exchanger wall temperature sensor 9
wPreset temperature T with temperature controlled water tank
0Control enters the temperature of the chilled water of heat interchanger 1, makes the wall surface temperature of described heat interchanger remain on T
0.
In the present embodiment, temperature controlled water tank adopts the open type design, comprises casing 21, control system 22, heating unit 23, water inlet 24, water delivering orifice 25, overflow vent 26, moisturizing pipeline 29, water supplement port valve 27 and outlet valve 28.Control system 22 is according to the temperature that is arranged on heat exchanger wall temperature sensor 9 feedbacks on heat interchanger 1 wall, heating unit 23 is controlled, thereby control cooling water temperature by the working condition of controlling heating unit 23, and then reach the constant effect of heat interchanger 1 wall surface temperature.Wherein outlet valve 28 is selected gate valve or variable valve, can regulate the inflow of heat interchanger chilled water by outlet valve 28, to change the Reynolds number of current in heat interchanger.
In the present embodiment, heat interchanger 1 adopts the sleeve pipe form, comprises inner tube 11 and outer tube 12, outer tube 12 is not flange-cooled light pipe, inner tube 11 and outer tube 12 all adopt straight tube, and inner first water stream channel that forms of inner tube 11, form the second water stream channel between outer tube 12 and inner tube 11.Inlet channel 13 and outlet conduit 14 are positioned at the same end of sleeve pipe, and inner tube 11 communicates with inlet channel 13, and outer tube 12 communicates with outlet conduit 14.At the other end of sleeve pipe, outer tube 12 sealings, inner tube 11 is opened wide, and the first water stream channel and the second water stream channel communicate.Adopt the heat interchanger of this arrangement to form inlet channel 13, the first water stream channel, the second water stream channel, the such cooling water path of outlet conduit 14, realized the heat exchange of chilled water and flue gas in flue.
As shown in Figure 2, in the present embodiment, control system 22 comprises power supply 221, temperature controller 222, relay 223, data collecting instrument 224 and pump switch 225.Temperature controller 222 is connected with heat exchanger wall temperature sensor 9, and temperature controller 222 is by design temperature T
0Compare the break-make of pilot relay 223 with the detected temperatures of heat exchanger wall temperature sensor 9; Pump switch 225 is connected between power supply 221 and water pump 6, controls the work of water pump 6; Data collecting instrument 224 is connected with inflow temperature sensor 7 with leaving water temperature sensor 8, demonstrates in real time coolant-temperature gage and inflow temperature; Power supply 221 is to temperature controller 222, relay 223, data collecting instrument 224 and water pump 6 power supplies.
In the present embodiment, flowmeter 5 adopts spinner-type flowmeter.
During installation, the outlet valve of temperature controlled water tank 28 is connected to the inlet channel 13 of heat interchanger 1 through flowmeter 5, water pump 6; The outlet conduit of heat interchanger 1 14 is directly connected to the water inlet 24 of temperature controlled water tank 2; Moisturizing pipeline 29 also directly is connected with the water inlet 24 of temperature controlled water tank 2, water supplement port valve 27 is installed, for regulating refill flow on moisturizing pipeline 29.The effect of introducing make-up water by moisturizing pipeline 29 is to supplement normal-temperature water in water tank, thereby makes the temperature of Water in Water Tanks to reduce, and coordinates with heating unit 23 and realizes that water tank temperature is two-way controlled.In practical operation, when needs fast reducing cooling water temperature, the aperture of water supplement port valve 27 can be tuned up, when device stable operation, the aperture of water supplement port valve 27 can be turned down or closed.
In the present embodiment, directly measured quantities comprises the effective heat exchange length L=1.2m of heat interchanger, outer tube outside diameter d
Outside 12=38mm, outer tube diameter d
In 12=32mm, inner tube outside diameter d
Outside 11=15mm, inner tube diameter d
In 11=13mm, cooling water flow q
v, inflow temperature T
In, wall surface temperature T
w, leaving water temperature T
out, flue-gas temperature T
gas, flue gas wind speed v
g.
In actual measurement, measured in accordance with the following steps:
1) Sensor section of the detection section of the heat exchanging segment of heat interchanger 1, anemometer detector 3 and flue gas analyzer 4 is all stretched in flue through the viewport of boiler flue wall 10;
2) close outlet valve 28, open water supplement port valve 27, by preset temperature T
0Be set in 70 ℃, after the water temperature data of data collecting instrument 224 demonstrations reach 70 ℃, open outlet valve 28 and start water pump 6;
3) after 24 hours, record the flue-gas temperature T that flue gas analyzer 4 is measured until system stability
gas, the inflow temperature T that measures of inflow temperature sensor 7
In, the leaving water temperature T that measures of leaving water temperature sensor 8
out, the heat exchanger wall surface temperature T that measures of heat exchanger wall temperature sensor 9
w, the volumetric flow rate q that measures of flowmeter 5
vAnd the flue gas air speed value v of anemometer detector 3 measurements
g
4) calculate when the heat interchanger wall temperature be T
wThe time, different current reynolds number Res
fUnder Nu Xier count Nu
4.1) according to equation
Calculate present flow rate q
vUnder the current reynolds number Re
f,
Wherein, d
Outside 12For outer tube external diameter, d
In 12For outer tube diameter, d
Outside 11For inner tube external diameter, q
vFor the volumetric flow rate that flowmeter 5 is measured, γ
fFor the kinetic viscosity of water,
4.2) according to heat exchange equation cm (T
out-T
In)=hA (T
g-T
In) to calculate the heat interchanger wall temperature be T
wCoefficient of heat transfer h under condition,
Wherein, the specific heat at constant pressure that c is water,
M participates in the cooling water inflow of heat exchange, m=q in the unit interval
v* ρ, the density that ρ is water, get=1000kg/m
3,
T
out, T
In, T
gBe respectively leaving water temperature, inflow temperature and flue-gas temperature,
A is effective heat exchange area, A=π Ld
Outside 12,
Wherein, L is effective heat exchange length, d
Outside 12For the outer tube external diameter,
4.3) according to equation Nu=h * d
Outside 12/ λ
gCalculate Nu Xier and count Nu,
Wherein, λ
gFor thermal conductivity coefficient of flue gas
4.4) change the flow of inlet water q of heat interchanger by outlet valve 28 apertures of regulating temperature controlled water tank
v, repeatedly repeating step 4.1,4.2 and 4.3 take obtain when wall temperature be T
wThe time, different Reynolds number Re
fNu Xier number under condition;
5) successively reduce preset temperature T
0, when repeating step 3,4 is respectively 70 ℃, 65 ℃, 60 ℃, 55 ℃, 52 ℃, 48 ℃, 42 ℃, 40 ℃ to obtain wall temperature, different Reynolds number Re
fNu Xier number under condition;
6) observe the Changing Pattern of Nu Xier number under different wall temperatures, determine the heat exchange property sudden change critical temperature (engineering acid dew point) that the temperature before the Nu Xier number is undergone mutation is heat interchanger.
Under heat interchanger physical dimension and the fixing condition of smoke components, the Nu Xier number is directly proportional to the coefficient of heat transfer, the Nu Xier number has reflected the heat exchange property of heat interchanger, use the Nu Xier number to mean that the heat exchange property of heat interchanger is in order to make the heat exchange property nondimensionalization, get rid of the impact of heat interchanger physical dimension and flue gas physical parameter heat exchanging performance.
According to the method described above, the main calculation results obtained in the present embodiment is as shown in table 1
Table 1 Nu Xier number is with the change list of Reynolds number in temperature and pipe
Use data in interpolation method and approximation method his-and-hers watches 1 to be processed, obtain under different temperatures, Reynolds number is respectively 1700,650 and the Nu Xier number of 300 o'clock, as shown in table 2,
Under table 2 different temperatures, the interior Reynolds number of pipe is respectively the Nu Xier number of 1700,650,300 o'clock
The curve map be depicted as according to the data in table 2 obtains Fig. 3, and this figure has reflected the temperature variant situation of the heat exchange property of heat interchanger intuitively.As shown in Figure 4, the Nu Xier number under different Reynolds number presents identical Changing Pattern, and overall trend is for constantly reducing along with temperature reduces the Nu Xier number, and this and heat interchanger dust stratification constantly increase, and the continuous variation of heat exchange property is relevant; Simultaneously, within 55 ℃ and 52 ℃ of temperature ranges and 48 ℃ and 42 ℃ of temperature ranges, twice sudden change occurred, this is consistent with aforesaid qualitative analysis, because wall temperature reduces acid and the water priority dewfall caused in flue gas, a large amount of wet ashes appear in heat interchanger in 1 surface short time, have a strong impact on the heat exchange property of heat interchanger 1.
The heat exchange property change curve obtained according to the present embodiment, can reach a conclusion, under current flue gas environment, the heat exchange property sudden change critical temperature (engineering acid dew point) of heat interchanger is 55 ℃ of left and right, in engineering practice, by control device, make heat interchanger keep away the wall degree and remain on more than 55 ℃ and can guarantee the standby higher heat exchange property of heat transfer equipment, thereby provide foundation for the design of bootstrap system.
The heat interchanger that adopts the sleeve pipe form is for the ease of manufacturing and carrying, those skilled in the art should understand, in order to obtain more obvious coefficient of heat transfer variation tendency, the flange-cooled spiral fin coil of the better outer tube of heat transfer effect be can adopt, the heat interchanger of bend pipe form and the heat interchanger of other form also can be adopted.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of the utility model protection.
Claims (6)
1. one kind for determining the device of boiler smoke engineering acid dew point, it is characterized in that, comprise heat interchanger and temperature controlled water tank, described heat interchanger is the barrel-shaped structure communicated by inside and outside double-deck suit and a two-layer end, the skin of two-layer same side communicates with the water inlet of temperature controlled water tank by pipeline, and internal layer communicates with the water delivering orifice of temperature controlled water tank through pipeline and the flowmeter, water pump, the outlet valve that are arranged on this pipeline; The water inlet of described temperature controlled water tank also is communicated with the moisturizing pipeline, and described heat interchanger outer wall is provided with the heat exchanger wall temperature sensor, is respectively equipped with inflow temperature sensor and leaving water temperature sensor on the pipeline be connected with the temperature controlled water tank entery and delivery port; Be provided with heating unit in temperature controlled water tank, described heat exchanger wall temperature sensor, inflow temperature sensor, leaving water temperature sensor and heating unit are connected with the control system of temperature controlled water tank respectively.
2. device as claimed in claim 1, it is characterized in that, described heat interchanger comprises inner tube, outer tube, water inlet pipe and outlet conduit, described inner and outer tubes are set in together, inner first water stream channel that forms of inner tube, between outer tube and inner tube, there is space to form the second water stream channel, described inlet channel and outlet conduit all are positioned at the first end of heat interchanger, at first end, inlet channel communicates with the first water stream channel, outlet conduit communicates with the second water stream channel, and the outer tube port sealing by fusing of first end is on the inner tube periphery; The other end of described heat interchanger is the second end, the outer tube end-enclosed of the second end, and inner tube is open ended, and the first water stream channel and the second water stream channel communicate.
3. device as claimed in claim 2, is characterized in that, described outer tube is not flange-cooled light pipe or flange-cooled various extended surface heat-transfer pipe.
4. device as claimed in claim 1, it is characterized in that, described temperature controlled water tank comprises casing, control system, heating unit, water inlet, water delivering orifice, overflow vent, the moisturizing pipeline, water supplement port valve and outlet valve, described water delivering orifice is arranged at the casing side near the place, bottom, water inlet is positioned at casing top, overflow vent is positioned at the casing side near tip position, set-up of control system is on casing one side, heating unit is arranged in casing, heating unit is electrically connected to control system, water outlet is provided with outlet valve, water inlet also is provided with the moisturizing pipeline, the moisturizing pipeline is provided with the water supplement port valve.
5. device as claimed in claim 4, is characterized in that, described control system comprises power supply, temperature controller, relay, data collecting instrument and pump switch, and wherein, described temperature controller, relay, data collecting instrument and pump switch are connected with power supply respectively; Described heat exchanger wall temperature sensor is connected with described temperature controller respectively with relay, and relay also is connected with heating unit; Described pump switch is connected between power supply and water pump; Described leaving water temperature sensor is connected with described data collecting instrument respectively with described inflow temperature sensor.
6. device as claimed in claim 4, is characterized in that, described water supplement port valve and outlet valve are gate valve or variable valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204227208U CN203324212U (en) | 2013-07-16 | 2013-07-16 | Device for determining engineering acid dew point of boiler flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204227208U CN203324212U (en) | 2013-07-16 | 2013-07-16 | Device for determining engineering acid dew point of boiler flue gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383365A (en) * | 2013-07-16 | 2013-11-06 | 山东大学 | Device for determining boiler flue gas engineering acid dew point |
| CN104458810A (en) * | 2014-12-18 | 2015-03-25 | 山东大学 | Thermodynamic method based flue gas engineering acid dew point measurement device |
| CN107144599A (en) * | 2017-06-30 | 2017-09-08 | 广东电网有限责任公司电力科学研究院 | A kind of flue gas acid dew point measurement apparatus |
-
2013
- 2013-07-16 CN CN2013204227208U patent/CN203324212U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383365A (en) * | 2013-07-16 | 2013-11-06 | 山东大学 | Device for determining boiler flue gas engineering acid dew point |
| CN103383365B (en) * | 2013-07-16 | 2015-06-17 | 山东大学 | Device for determining boiler flue gas engineering acid dew point |
| CN104458810A (en) * | 2014-12-18 | 2015-03-25 | 山东大学 | Thermodynamic method based flue gas engineering acid dew point measurement device |
| CN107144599A (en) * | 2017-06-30 | 2017-09-08 | 广东电网有限责任公司电力科学研究院 | A kind of flue gas acid dew point measurement apparatus |
| CN107144599B (en) * | 2017-06-30 | 2023-05-12 | 南方电网电力科技股份有限公司 | Flue gas acid dew point measuring device |
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