CN103292311A - Heat filler type deaerator with stable deaerating function and atomizing function - Google Patents
Heat filler type deaerator with stable deaerating function and atomizing function Download PDFInfo
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- CN103292311A CN103292311A CN201310211653XA CN201310211653A CN103292311A CN 103292311 A CN103292311 A CN 103292311A CN 201310211653X A CN201310211653X A CN 201310211653XA CN 201310211653 A CN201310211653 A CN 201310211653A CN 103292311 A CN103292311 A CN 103292311A
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Abstract
The invention discloses a heat filler type deaerator with a stable deaerating function and an atomizing function. The heat filler type deaerator is characterized in that a heat-side inlet of an exhaust heat exchanger is communicated with a blowoff valve through a pipeline, a cold-side inlet of the exhaust heat exchanger is communicated with a deaerator water supply pipe, a cold-side water outlet of the exhaust heat exchanger is communicated with a deaerator water supply inlet through a pipeline, a heat-side inlet of a water outlet heat exchanger is communicated with a deaerator water outlet, a boiler water supply pump is connected to a heat-side outlet pipeline, a cold-side water inlet of the water outlet heat exchanger is communicated with the deaerator water supply pipe, a water supply pump is arranged on the deaerator water supply pipe, a differential pressure transmitter is arranged in a deaerator water tank, detected water level signals in the deaerator water tank are transmitted to a controller through the differential pressure transmitter, the controller transmits signals to a frequency converter, the frequency converter controls rotation speed of the water pump to adjust water supply, a pressure control gauge transmits pressure signals to the controller which controls opening of preheating pipeline electromagnetic valves, a temperature sensor transmits temperature signals to the controller, and then the controller controls opening of reheating steam electromagnetic valves.
Description
Technical field
The present invention relates to a kind of industrial boiler water-supply oxygen-eliminating device, particularly a kind of energy is stablized the thermal spraying material filling type oxygen-eliminating device of deoxygenation.
Background technology
In the various water sources such as running water, well water, all be dissolved with certain oxygen and CO
2Gas, after in a single day they enter boiler with boiler feedwater, under the condition that high temperature, pressure, electrolyte exist, the dissolved oxygen in the water, carbon dioxide can produce chemistry and electrochemical corrosion to the Boiler Metallic wall, therefore must take degasification (particularly deoxygenation) measure.
Industrial boilers in China adopts demineralized water at present, and desalted water is done boiler feedwater, and the dissolved oxygen corrosion problem is more outstanding.Because the corrosion of boiler is a process slowly, the harm of its generation is subtle in a short time, thereby some enterprise thinks little of deoxygenation.On the other hand, owing to lack good deoxygenation technology, the Industrial Boiler of China 50% does not dispose or fails effectively to utilize oxygen-eliminating device, causes the Industrial Boiler average life span to shorten 1/3, causes enormous economic loss for enterprise and country.
Minimum to boiler infringement in how many times for the feedwater oxygen content, among " Industrial Boiler water quality " GB1576-2008 detailed regulation is arranged, as table 1:
Table 1
Rated capacity is more than or equal to the boiler of 10t/h, and deoxygenation is answered in feedwater.If rated capacity is found local oxygen corrosion less than the boiler of 10t/h, also should take the deoxygenation measure.
Present thermal spraying material filling type oxygen-eliminating device (as shown in Figure 1) adopts the filled method of spraying, feedwater is sent out the whereabouts that nebulizes by nozzle, meet with the vapor stream that rises, the result of atomizing has increased the heat exchange area of water and steam greatly, strengthened the effect of carbonated drink heat exchange, when vaporific water droplet continues to flow through the packing layer of random stacking, be subjected to from the further heating of the next steam of deoxygenation water tank, the heated speed of water is more rapid, and the eliminating speed that is dissolved in gas wherein is also more fast.Therefore, though the time that water stops in oxygen-eliminating device is very short, and the effect of deoxygenation is fine.
Its structure comprises oxygen-removing tower (1) and the deoxygenation water tank (2) that is positioned at oxygen-removing tower (1) below and communicates with it, be provided with sprayer unit and filler (not providing among the figure) in the oxygen-removing tower (1), described sprayer unit is above filler, the filler below is provided with air-spreading disk, described oxygen-removing tower (1) is provided with deaerator feedwater mouth, exhaust-valve (4), ordinarily manometer and preheating jet chimney (7), and sprayer unit is communicated with the deaerator feedwater mouth.Be provided with temperature sensor (6) in the described oxygen-removing tower (1); Described deoxygenation water tank (2) is provided with delivery port and reheated steam pipe (9), described preheating jet chimney (7) is provided with preheating pipe magnetic valve (11), described reheated steam pipe (9) is provided with reheated steam magnetic valve (12), and the import of pre-vapours is positioned at the sprayer unit below.
Traditional oxygen-eliminating device adopts following control mode
1, water level control: adopt float-ball type altitude valve (21), when deaerator level raises, utilize ball float to rise and lever principle pass minor valve, otherwise then open big valve, thereby realize Water Level Control.This control advantage is continuous water feeding, makes the deaerator feedwater equilibrium, does not have tangible water-level fluctuation, shortcoming is that the water level control accuracy is poor, when deaerator level raises, only depend on the buoyancy that ball float rises can not closed control valve, thereby make the oxygen-eliminating device full water, cause the waste of the energy.The full water of oxygen-eliminating device immerses in the water whole oxygen-removing tower fully in addition, has destroyed the atomizing effect of feedwater and the heat exchange of carbonated drink, can not guarantee deaerating effect.
2, temperature control: adopt temperature sensor to survey the temperature of oxygen-eliminating device inner water tank, send control instruction by controller and control reheated steam magnetic valve and the heating of preheating pipe magnetic valve simultaneously.Shortcoming is, when temperature is lower than design temperature in the oxygen-eliminating device jar, reheated steam magnetic valve and preheating pipe magnetic valve are opened simultaneously, constantly import steam, and reheated steam is in time carried out heat exchange with feedwater, do not cause the increase of headroom pressure, and the steam that the preheating jet chimney enters increases headroom pressure because heat exchange can not be in time carried out in the minimizing of feedwater, open the safety valve pressure release when surpassing oxygen-eliminating device safety valve setting pressure, thereby cause the waste of the energy.
3, pressure control: rely on the safety valve superpressure to discharge to control a jar internal pressure, make jar internal pressure fluctuation big, energy waste is serious.
4, installation site: oxygen-eliminating device will produce cavitation because leaving water temperature height (104 ℃ of full Heshui steam pressure 1.2MPa of correspondence are greater than atmospheric pressure) is vaporized when being directly used in the water pump feedwater under normal pressure.Traditional settling mode is the setting height(from bottom) that increases oxygen-eliminating device, though overcome the pump cavitation phenomenon, has increased capital expenditure.Because the raising of feed temperature is unfavorable for that boiler economizer effectively utilizes fume afterheat, exhaust gas temperature is raise.
Thereby traditional oxygen-eliminating device when steam load fluctuates, very easily cause deaerator level, temperature, pressure de-stabilising effect the effect of deoxygenation, cause waste and the boiler safety hidden danger of the energy simultaneously.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the thermal spraying material filling type oxygen-eliminating device that a kind of energy is stablized deoxygenation.Avoid traditional oxygen-eliminating device when steam load fluctuates, very easily to cause the instability of deaerator level, temperature, pressure simultaneously, influenced the effect of deoxygenation, caused the waste of the energy and the defective of boiler safety hidden danger simultaneously.
To achieve these goals, technical scheme of the present invention is as follows: a kind of energy is stablized the thermal spraying material filling type oxygen-eliminating device of deoxygenation, comprise oxygen-removing tower (1) and the deoxygenation water tank (2) that is positioned at oxygen-removing tower (1) below and communicates with it, described oxygen-removing tower (1) is provided with deaerator feedwater mouth, exhaust-valve (4), pressure control table (5) and preheating jet chimney (7), is provided with temperature sensor (6) in the described oxygen-removing tower (1); Described deoxygenation water tank (2) is provided with oxygen-eliminating device delivery port and reheated steam pipe (9), described preheating jet chimney (7) is provided with preheating pipe magnetic valve (11), described reheated steam pipe (9) is provided with reheated steam magnetic valve (12), it is characterized in that: also comprise exhaust heat exchanger (13) and go out water heat exchanger (14), the hot side-entrance of described exhaust heat exchanger (13) is communicated with exhaust-valve (4) by pipeline, the cold side import of described exhaust heat exchanger (13) is communicated with deaerator feedwater pipe (3), its cold side delivery port is communicated with the deaerator feedwater mouth by pipeline, the described hot side-entrance that goes out water heat exchanger (14) is communicated with the oxygen-eliminating device delivery port, connect boiler feed pump (15) on its hot side outlet pipeline, the described cold side import that goes out water heat exchanger (14) is communicated with deaerator feedwater pipe (3), and its cold side outlet also is communicated with the deaerator feedwater mouth by pipeline;
Described deaerator feedwater pipe (3) is provided with feed pump (17), be provided with differential pressure transmitter (18) in the described deoxygenation water tank (2), described differential pressure transmitter (18) passes to controller (16) with the water level signal in the deaerator storage tank (2) that records, described controller (16) is delivered to control signal in the frequency converter (22) of variable-frequency motor, the rotating speed of described frequency converter (22) control feed pump (17), thus confluent adjusted; Described pressure control table (5) is given controller (16) with pressure signal transmission, described controller (16) is according to the aperture of the pressure signal control preheating pipe magnetic valve (11) of pressure control table (5), described temperature sensor (6) passes to controller (16) with temperature signal, and described controller (16) is according to the aperture of the temperature signal control reheated steam magnetic valve (12) of temperature sensor (6).
In technique scheme: described oxygen-removing tower (1) is provided with safety valve (19).
In technique scheme: described deaerator storage tank (2) is provided with blow-off pipe (20).
In technique scheme: described preheating jet chimney (7) and reheated steam pipe (9) are all connected with the steam pipe that comes out from cylinder, and described steam pipe is provided with Pressure gauge (10) and pressure-reducing valve (8).
Beneficial effect: 1, the present invention adopts differential pressure transmitter control water level, and frequency converter changes the frequency follow-up automatically during SEA LEVEL VARIATION, and water level is constant reliable, energy-conservation.
2, to the reheated steam magnetic valve+temperature sensor+controller of deoxygenation water tank reheated steam pipe, water temperature is not less than 104 ℃ in the control water tank.Thermostatic control water tank water temperature can thoroughly guarantee boiler water quality further except the gas that does not eliminate in anhydrating.
3, to guarantee the good degassing effect of oxygen-eliminating device, except isolating the gas, must guarantee that also isolated gas can discharge smoothly.Therefore must guarantee that jar internal pressure is slightly higher than external atmospheric pressure, about general gauge pressure 0.02MPa, at oxygen-removing tower pressure control table (controlled pressure 0.01～0.04MPa) control steam preheating pipeline magnetic valve is set.Advantage: when deaerator feedwater, the jar internal pressure progressively reduces, when pressure is lower than 0.01MPa, the preheating pipe magnetic valve is in time opened preheating and ftercompction is carried out in feedwater, keep jar internal pressure all the time greater than external atmosphere pressure, in order to discharging oxygen, the steam that the while headroom is full of is conducive to separating out of water oxygen.Analyse the oxygen discharge capacity by the aperture control of adjusting exhaust steam valve.
4, set up residual heat using device: add out water heat exchanger and exhaust heat exchanger, utilize the feedwater of oxygen-eliminating device to cool off the water outlet of oxygen-eliminating device and high-temperature steam and the oxygen of discharging through exhaust steam valve, waste heat is reused.Promote the deaerator feedwater temperature, reduced the inflow temperature of boiler feed pump again, avoided the generation of mercury vapour erosion phenomenon.The present invention simultaneously adopts low level to arrange, has reduced civil engineering costs.
Description of drawings
Fig. 1 improves preceding structural representation for the present invention;
Fig. 2 is the structural representation of the present invention after improving;
Fig. 3 is circuit diagram of the present invention.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
Embodiment 1, shown in Fig. 2-3, energy of the present invention is stablized the thermal spraying material filling type oxygen-eliminating device of deoxygenation, comprises oxygen-removing tower 1, the deoxygenation water tank 2 that is positioned at oxygen-removing tower 1 below and communicates with it, deaerator feedwater pipe 3, exhaust-valve 4, pressure control table 5, temperature sensor 6, preheating jet chimney 7, pressure-reducing valve 8, reheated steam pipe 9, Pressure gauge 10, preheating pipe magnetic valve 11, reheated steam magnetic valve 12, exhaust heat exchanger 13, go out water heat exchanger 14, boiler feed pump 15, controller 16, feed pump 17, differential pressure transmitter 18, safety valve 19, parts such as blow-off pipe 20 and frequency converter 22 are formed.
Be provided with sprayer unit, filler in the described oxygen-removing tower 1, gas distribution pipe etc., this does not do at this for existing design and gives unnecessary details.Described oxygen-removing tower 1 is provided with deaerator feedwater mouth, exhaust-valve 4, pressure control table 5, safety valve 19 and preheating jet chimney 7, is provided with temperature sensor 6 in the described oxygen-removing tower 1; Described deoxygenation water tank 2 is provided with oxygen-eliminating device delivery port, blow-off pipe 20 and reheated steam pipe 9, described preheating jet chimney 7 is provided with preheating pipe magnetic valve 11, described reheated steam pipe 9 is provided with reheated steam magnetic valve 12, described preheating jet chimney 7 and reheated steam pipe 9 are all connected with the steam pipe that comes out from cylinder, and described steam pipe is provided with Pressure gauge 10 and pressure-reducing valve 8.
The hot side-entrance of described exhaust heat exchanger 13 is communicated with exhaust-valve 4 by pipeline, the cold side import of described exhaust heat exchanger 13 is communicated with deaerator feedwater pipe 3, its cold side delivery port is communicated with the deaerator feedwater mouth by pipeline, the steam that comes out in the described exhaust-valve 4 becomes water after cooling, this water is directly discharged from exhaust heat exchanger 13.The described hot side-entrance that goes out water heat exchanger 14 is communicated with the oxygen-eliminating device delivery port, connect boiler feed pump 15 on its hot side outlet pipeline, give boiler water supply, the described cold side import that goes out water heat exchanger 14 is communicated with deaerator feedwater pipe 3, and its cold side exports and also is communicated with the deaerator feedwater mouth;
Described deaerator feedwater pipe 3 is provided with feed pump 17, described feed pump 17 adopts variable-frequency motor control, be provided with differential pressure transmitter 18 in the described deoxygenation water tank 2, described differential pressure transmitter 18 passes to controller 16 with the water level signal in the deaerator storage tank 2 that records, described controller 16 is delivered to control signal in the frequency converter 22 of variable-frequency motor, the rotating speed of described frequency converter 22 control feed pumps 17, thus confluent adjusted; Described pressure control table 5 is given controller 16 with pressure signal transmission, described controller 16 is according to the aperture of the pressure signal control preheating pipe magnetic valve 11 of pressure control table 5, described temperature sensor 6 passes to controller 16 with temperature signal, and described controller 16 is according to the aperture of the temperature signal control reheated steam magnetic valve 12 of temperature sensor 6.
As can be seen from Figure 2, high steam is decompressed to proper operation pressure (general summer 0.4MPa through steam reducing valve 8, winter 0.6Mpa), enter the oxygen-eliminating device water back, the oxygen-eliminating device heating tube is made up of two parts, a part is preheating jet chimney 7, by 16 controls of jar internal pressure control table 5+ preheating pipe magnetic valve 11+ controller, during deaerator feed water pump 17 feedwater, a jar internal pressure progressively reduces, when pressure is lower than 0.01MPa, preheating pipe magnetic valve 11 is in time opened preheating and ftercompction is carried out in feedwater, keep jar internal pressure all the time greater than external atmosphere pressure, in order to discharging oxygen, the steam that while oxygen-eliminating device headroom is full of is conducive to separating out of water oxygen; Another part is reheated steam pipe 9, and by 16 controls of temperature sensor 6+ reheated steam magnetic valve 12+ controller, water temperature is not less than 104 ℃ in the control water tank.Thermostatic control water tank water temperature can thoroughly guarantee boiler water quality further except the gas that does not eliminate in anhydrating.
Because the full Heshui steam pressure of oxygen-eliminating device leaving water temperature is greater than atmospheric pressure, be directly used in the boiler feedwater meeting and produce cavitation, for solving the cavitation problem, must cool off the oxygen-eliminating device water outlet, namely add exhaust heat exchanger 13 and go out water heat exchanger 14, utilize the feedwater of oxygen-eliminating device to cool off the water outlet of oxygen-eliminating device and the high-temperature steam of discharging through exhaust steam valve 4, and waste heat is reused.Save thermal source, promoted the deaerator feedwater temperature, reduced the inflow temperature of boiler feed pump 15 again.Avoided the generation of pump cavitation phenomenon.
Deaerator level changes by differential pressure transmitter 18 measurements and feeds back to controller 16 analyses as shown in Figure 3, the output corresponding control signal is given frequency converter 22 execution of variable-frequency motor in controller 16 and after setting value relatively, control confluent by frequency converter 22 control feed pumps 17 rotating speeds, thereby reach the purpose of permanent water level control.Frequency converter 22 changes the frequency follow-up automatically during SEA LEVEL VARIATION, and water level is constant reliable, energy-conservation.
The above only is preferred embodiment of the present invention, is not restriction with the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the thermal spraying material filling type oxygen-eliminating device that can stablize deoxygenation, comprise oxygen-removing tower (1) and the deoxygenation water tank (2) that is positioned at oxygen-removing tower (1) below and communicates with it, described oxygen-removing tower (1) is provided with deaerator feedwater mouth, exhaust-valve (4), pressure control table (5) and preheating jet chimney (7), is provided with temperature sensor (6) in the described oxygen-removing tower (1); Described deoxygenation water tank (2) is provided with oxygen-eliminating device delivery port and reheated steam pipe (9), described preheating jet chimney (7) is provided with preheating pipe magnetic valve (11), described reheated steam pipe (9) is provided with reheated steam magnetic valve (12), it is characterized in that: also comprise exhaust heat exchanger (13) and go out water heat exchanger (14), the hot side-entrance of described exhaust heat exchanger (13) is communicated with exhaust-valve (4) by pipeline, the cold side import of described exhaust heat exchanger (13) is communicated with deaerator feedwater pipe (3), its cold side delivery port is communicated with the deaerator feedwater mouth by pipeline, the described hot side-entrance that goes out water heat exchanger (14) is communicated with the oxygen-eliminating device delivery port, connect boiler feed pump (15) on its hot side outlet pipeline, the described cold side import that goes out water heat exchanger (14) is communicated with deaerator feedwater pipe (3), and its cold side outlet also is communicated with the deaerator feedwater mouth by pipeline;
Described deaerator feedwater pipe (3) is provided with feed pump (17), be provided with differential pressure transmitter (18) in the described deoxygenation water tank (2), described differential pressure transmitter (18) passes to controller (16) with the water level signal in the deaerator storage tank (2) that records, described controller (16) is delivered to control signal in the frequency converter (22) of variable-frequency motor, the rotating speed of described frequency converter (22) control feed pump (17), thus confluent adjusted; Described pressure control table (5) is given controller (16) with pressure signal transmission, described controller (16) is according to the aperture of the pressure signal control preheating pipe magnetic valve (11) of pressure control table (5), described temperature sensor (6) passes to controller (16) with temperature signal, and described controller (16) is according to the aperture of the temperature signal control reheated steam magnetic valve (12) of temperature sensor (6).
2. stablize the thermal spraying material filling type oxygen-eliminating device of deoxygenation according to the described energy of claim 1, it is characterized in that: described oxygen-removing tower (1) is provided with safety valve (19).
3. stablize the thermal spraying material filling type oxygen-eliminating device of deoxygenation according to the described energy of claim 1, it is characterized in that: described deaerator storage tank (2) is provided with blow-off pipe (20).
4. stablize the thermal spraying material filling type oxygen-eliminating device of deoxygenation according to the described energy of claim 1, it is characterized in that: described preheating jet chimney (7) and reheated steam pipe (9) are all connected with the steam pipe that comes out from cylinder, and described steam pipe is provided with Pressure gauge (10) and pressure-reducing valve (8).
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| CN201310211653XA CN103292311A (en) | 2013-05-31 | 2013-05-31 | Heat filler type deaerator with stable deaerating function and atomizing function |
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| CN201310211653XA CN103292311A (en) | 2013-05-31 | 2013-05-31 | Heat filler type deaerator with stable deaerating function and atomizing function |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941763A (en) * | 2014-01-07 | 2014-07-23 | 广州粤能电力科技开发有限公司 | Boiler water supply de-aerator temperature rise automatic control method and system |
| CN105823035A (en) * | 2016-03-22 | 2016-08-03 | 昆明理工大学 | Solar device for conducting water supplementing and deoxidizing on boiler |
| CN106016243A (en) * | 2016-06-21 | 2016-10-12 | 昆明理工大学 | Energy-saving control device of small boiler of solar hot water deaerator |
| RU178324U1 (en) * | 2017-03-10 | 2018-03-30 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный технический университет" | BOILER INSTALLATION |
| CN110131701A (en) * | 2018-02-08 | 2019-08-16 | 红塔烟草(集团)有限责任公司 | Thermal deoxygenizing apparatus and its method |
| CN110500573A (en) * | 2019-09-23 | 2019-11-26 | 云南锡业股份有限公司铜业分公司 | A kind of system and method preventing electrode steam boiler water supply pump cavitation |
| CN112610947A (en) * | 2020-12-17 | 2021-04-06 | 无锡惠联热电有限公司 | Secondary deoxygenation process for cogeneration water supply system |
| CN114234171A (en) * | 2021-12-02 | 2022-03-25 | 中国船舶重工集团公司第七0三研究所 | Deaerator pressure control method |
| CN114873676A (en) * | 2022-01-25 | 2022-08-09 | 罗艳英 | Spray washing type deaerator and control system thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105823035A (en) * | 2016-03-22 | 2016-08-03 | 昆明理工大学 | Solar device for conducting water supplementing and deoxidizing on boiler |
| CN106016243A (en) * | 2016-06-21 | 2016-10-12 | 昆明理工大学 | Energy-saving control device of small boiler of solar hot water deaerator |
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| RU178324U1 (en) * | 2017-03-10 | 2018-03-30 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный технический университет" | BOILER INSTALLATION |
| CN110131701A (en) * | 2018-02-08 | 2019-08-16 | 红塔烟草(集团)有限责任公司 | Thermal deoxygenizing apparatus and its method |
| CN110500573A (en) * | 2019-09-23 | 2019-11-26 | 云南锡业股份有限公司铜业分公司 | A kind of system and method preventing electrode steam boiler water supply pump cavitation |
| CN112610947A (en) * | 2020-12-17 | 2021-04-06 | 无锡惠联热电有限公司 | Secondary deoxygenation process for cogeneration water supply system |
| CN114234171A (en) * | 2021-12-02 | 2022-03-25 | 中国船舶重工集团公司第七0三研究所 | Deaerator pressure control method |
| CN114234171B (en) * | 2021-12-02 | 2023-12-05 | 中国船舶重工集团公司第七0三研究所 | Deaerator pressure control method |
| CN114873676A (en) * | 2022-01-25 | 2022-08-09 | 罗艳英 | Spray washing type deaerator and control system thereof |
| CN114873676B (en) * | 2022-01-25 | 2023-12-15 | 台州市华丰空调阀门有限公司 | Spray washing deaerator and control system thereof |
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Application publication date: 20130911 |