CN213237484U - Vertical rotary-film deaerator - Google Patents
Vertical rotary-film deaerator Download PDFInfo
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- CN213237484U CN213237484U CN202021946017.3U CN202021946017U CN213237484U CN 213237484 U CN213237484 U CN 213237484U CN 202021946017 U CN202021946017 U CN 202021946017U CN 213237484 U CN213237484 U CN 213237484U
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Abstract
The utility model relates to a vertical rotary-film deaerator, which comprises a deaerator body, wherein the lower part of the body is connected with a deaerating water tank, the upper part of the body is provided with a steam-water separator interface and a steam outlet, and the inside of the body is sequentially provided with a steam distribution chamber, a water grate layer, a packing layer and a film removing device group from bottom to top, wherein the film removing device group comprises a rotary-film pipe, the packing layer comprises an omega-shaped net, and the water grate layer is used for secondary distribution of water flow; the lower part of the body is also provided with a heating steam interface communicated with the steam distribution chamber, the upper part of the body is also provided with a demineralized water interface and a standby port, and the upper end of the body is provided with a safety valve interface. The device has good deoxidizing effect, is suitable for different operating conditions of the unit, and can be widely applied to the technical field of power generation equipment.
Description
Technical Field
The utility model relates to a power generation facility technical field specifically indicates a vertical rotary film oxygen-eliminating device.
Background
The Ca is removed from the boiler feed water in the thermal power plant after softening or desalting2+、Mg2+Hardness, but dissolved oxygen in water was not removed. When water without deoxidization enters a boiler, oxygen corrosion is generated on a water supply pipeline of boiler equipment (mainly a coal economizer) and a through-flow part of a steam turbine, and the service life of the equipment is shortened. The oxygen corrosion of the economizer increases the iron content in the water, and the tube junctions of the water wall are oxidizedThe speed of the iron scale is in direct proportion to the iron content of the feed water, the iron oxide scale not only has poor heat conductivity, so that the water wall tube is damaged due to overheating because of poor cooling, but also can generate scale corrosion under the iron oxide scale, the damage of the water wall tube is accelerated, the reliability of the safe operation of the boiler is reduced, and the shutdown frequency is increased. Therefore, boiler feed water must be deoxygenated.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a technical scheme does:
a vertical rotary-film deaerator comprises a deaerator body, wherein the lower portion of the deaerator body is connected with a deaerating water tank, a steam-water separator connector and a steam exhaust port are arranged on the upper portion of the deaerator body, a steam distribution chamber, a water grate layer, a packing layer and a film removing set are sequentially arranged in the deaerator body from bottom to top, the film removing set comprises a rotary-film pipe, a plurality of through holes are formed in the rotary-film pipe, the packing layer comprises an omega-shaped net, and the water grate layer is used for secondary distribution of water flow; the steam heating device is characterized in that a heating steam interface communicated with the steam distribution chamber is further arranged on the lower portion of the body, a demineralized water interface and a standby port are further arranged on the upper portion of the body, and a safety valve interface is arranged at the upper end of the body.
Furthermore, a manhole door is further arranged on the body.
Further, the lower end of the body is provided with a flange communicated with the deoxygenation water tank.
Further, the water grate layer comprises a hollow structure formed by staggered angle irons and continuously arranged.
Furthermore, the demineralized water interface part is also connected with a second standby port, and the demineralized water interface comprises a demineralized water connecting pipe and an interface flange.
Furthermore, the steam-water separator interface comprises a steam-water separator connected to the upper end of the body and a connecting flange connected to the steam-water separator, and the steam exhaust port is located on the upper portion of the connecting flange and is of a flange plate structure.
Furthermore, the safety valve interface comprises an output pipe connected to the body, an output flange connected to the output pipe, and an oblique connecting beam with two ends respectively connected to the body and the output pipe.
Furthermore, still be equipped with manometer and pressure signal interface on the body, still be equipped with thermometer, thermal resistance interface on the body.
After the structure more than adopting, the utility model has the advantages of as follows:
by arranging the water grate layer, the packing layer and the membrane lifting unit, the deoxygenation efficiency is improved, the membrane lifting unit is suitable for different operating conditions of a generator set, and the application range is wide;
through setting up demineralized water interface, reserve mouth and relief valve interface, reached the purpose that improves device operating stability.
Drawings
Fig. 1 is a side view of an embodiment of the invention;
fig. 2 is a top view of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
With reference to the attached drawings 1 and 2, the vertical rotary-film deaerator comprises a deaerator body 1, wherein the lower portion of the body 1 is connected with a deaerating water tank, a steam-water separator connector 2 and a steam exhaust port 3 are arranged on the upper portion of the body 1, a steam distribution chamber 4, a water grate layer 5, a packing layer 6 and a film lifting unit 7 are sequentially arranged in the body 1 from bottom to top, the film lifting unit 7 comprises rotary-film pipes, a plurality of through holes are formed in the rotary-film pipes, the packing layer 6 comprises an omega-shaped net, and the water grate layer 5 is used for secondarily distributing water flow; the lower part of the body 1 is also provided with a heating steam interface 15 communicated with the steam distribution chamber 4, the upper part of the body 1 is also provided with a demineralized water interface 8 and a standby port 9, and the upper end of the body 1 is provided with a safety valve interface 10.
The feed water or the condensed water enters the deaerator body 1 from the demineralized water interface 8, primary deaerating is carried out through the rotary membrane tube in the membrane removing group 7, and specifically, the primary deaerating is realized through a through hole on the rotary membrane tube; the non-condensable gas of separation is discharged outside through catch water interface 2 like carbon dioxide, oxygen etc. and water enters into comb layer 5, packing layer 6 on, realizes the secondary distribution through water comb layer 5 to realize increasing vapour and water area of contact and then realize the purpose of secondary deoxidization through packing layer 6. When the temperature reduces in the oxygen-eliminating device body 1, through launching heating steam interface 15, reach the purpose to the water auxiliary heating in the oxygen-eliminating device body 1, maintain the temperature to guarantee the deoxidization effect.
In the process of deoxidizing by using the device, condensed water and make-up water in the running process of the unit enter the membrane lifting unit 7 and have certain pressure, and the pressure value is greater than the pressure in the deaerator, so that the condensed water and the make-up water have pressure difference; water is sprayed to the inner wall from the small holes in the membrane lifting unit 7 under certain pressure difference, jet flow motion is generated at the outlets of the small holes, and the heat and mass transfer process is strengthened by the jet flow, so that a large amount of heating steam is absorbed in a very short stroke and a very short time, and a large amount of oxygen is released to the space from water flow, and a certain oxygen removing effect is realized. The physical meaning of the jet flow is that liquid with certain pressure is ejected from a small hole to form a jet flow beam, static gas on two sides of the jet flow is driven by the jet flow flowing at high speed, and part of gas is taken away along with the flow of the jet flow, so that two sides of the jet flow beam form a local low-pressure area, and therefore, the gas at a far distance continuously flows to the low-pressure area to supplement the gas taken away by the jet flow, so that the gas is continuously taken away by the jet flow beam and is continuously supplemented from the far distance to form the whole process of movement, and the phenomenon is called entrainment of the jet flow.
When the membrane lifting unit 7 works normally, water in the water chamber is jetted into the inner wall of the membrane lifting device through the small holes in the membrane lifting unit 7 to form jet flow. Because the inner hole of the jet flow heating device is filled with heating steam, water sucks a large amount of heating steam in during jet flow movement to generate a violent mixed heating effect, so that the jet flow beam can absorb a large amount of heat, and the water temperature is greatly improved; on the other hand, because the process of spraying water from the small holes of the membrane forming group 7 to the inner holes is also a pressure reduction process, the pressure of the water is reduced, and therefore, a large amount of dissolved oxygen in the water can be released through the rising of the water temperature and the reduction of the water pressure, and the dissolved oxygen is diffused into the heating steam in the inner holes of the membrane forming group 7 to generate a mass transfer process. After the jet flow is finished, the water rotates along the inner hole wall of the membrane lifting unit 7 to form a layer of water membrane. The critical Reynolds number Re of the liquid in the rotational flow is greatly reduced compared with the critical Reynolds number Re of the liquid flowing in the straight pipe, namely the liquid is easy to generate turbulence in the rotational flow.
The separated oxygen is discharged from the inner hole of the membrane lifting group 7 and is discharged through the steam outlet 3 and finally is discharged to the atmosphere. In the process, the water flow realizes secondary distribution in the water grate layer 5 to form sheet film water, and the sheet film water is better contacted with steam to realize heat transfer and mass transfer. In the process of using the packing layer 6, the structure of the packing layer adopts a specially woven omega-shaped mesh state fine wire stainless steel mesh which has high heat storage coefficient, high separation rate and small air resistance and can deeply deoxidize water.
The body 1 is also provided with a manhole door 11.
Through setting up manhole door 11, can reach the purpose that conveniently overhauls the oxygen-eliminating device.
The lower end of the body 1 is provided with a flange 12 communicated with the deoxygenation water tank.
The deaerating water tank is used for storage and buffering, and can be connected with the body 1 through the flange 12.
The water grate layer 5 comprises a hollow structure formed by staggered angle irons which are continuously arranged.
In order to realize the secondary distribution of water flow and achieve the purpose of efficiently removing condensed water or water supply and oxygen, the water grate layer 5 is fixedly connected inside the main body 1 through a plurality of stainless steel meshes which are arranged at intervals, and in the structure, the water grate layer and the filler layer are continuously arranged, so that the water grate is high in functionality.
The part of the demineralized water interface 8 is also connected with a second spare port 13, and the demineralized water interface 8 comprises a demineralized water connecting pipe 8.1 and an interface flange 8.2.
The second spare port 13 and the second spare port 9 are arranged in the device, so that the safe and stable operation of the device in the operation process is ensured, and the purpose of using the device as a bypass under necessary conditions is realized.
The steam-water separator interface 2 comprises a steam-water separator connected to the upper end of the body 1 and a connecting flange connected to the steam-water separator, and the steam exhaust port 3 is located on the upper portion of the connecting flange and is of a flange plate structure.
The safety valve interface 10 comprises an output pipe 10.1 connected to the body 1, an output flange connected to the output pipe 10.1, and an oblique connecting beam 14 with two ends respectively connected to the body 1 and the output pipe 10.1.
The oblique connection beam 14 is provided, so that the connection firmness between the safety valve interface 10 and the body 1 can be improved.
The body 1 is also provided with a pressure gauge and a pressure signal interface 15, and the body 1 is also provided with a thermometer and a thermal resistance interface 16.
The purpose of measuring the temperature and the pressure of the deaerator body 1 can be achieved by arranging the pressure gauge, the pressure signal interface 15, the thermometer and the thermal resistance interface 16.
In conclusion, the heat transfer coefficient of the film forming group is large, the heat transfer area is large, so the heat transfer effect is particularly good, the temperature rise of water at the inlet and the outlet of the film forming group can reach 90 ℃, and the oxygen removing effect is better when the dissolved oxygen of water is only 7-15 mug/L measured under the water grate layer 5 under the condition that the dissolved oxygen of inlet water is 5000-8000 mug/L;
(2) the device has strong adaptability, can normally work under low load when the load of the generator set is greatly and rapidly changed, ensures good deoxidizing effect and is suitable for peak-shaving generator sets;
(3) the device does not generate vibration under any working condition, and has good safety performance;
(4) the membrane deaerator can be suitable for the sliding pressure operation, if some special measures are taken, the deaerator can also be suitable for the full sliding pressure operation with rated load from a unit, and the operation is simple and convenient;
(5) the maintenance is simple and convenient, the device has no wearing parts, and the maintenance workload is small.
Claims (8)
1. A vertical rotary-film deaerator comprises a deaerator body, wherein the lower portion of the deaerator body is connected with a deaerator water tank, and the upper portion of the deaerator body is provided with a steam-water separator connector and a steam exhaust port; the steam heating device is characterized in that a heating steam interface communicated with the steam distribution chamber is further arranged on the lower portion of the body, a demineralized water interface and a standby port are further arranged on the upper portion of the body, and a safety valve interface is arranged at the upper end of the body.
2. The vertical rotary film deaerator of claim 1, wherein the body is further provided with a manhole door.
3. The vertical rotary-film deaerator as claimed in claim 2, wherein a flange is provided at the lower end of the body for communicating with a deaerating water tank.
4. The vertical rotary-film deaerator of claim 1, wherein the water grate layer comprises a hollowed-out structure formed by angle iron staggered and arranged in series.
5. The vertical rotary film deaerator of claim 1, wherein the demineralized water interface portion is further connected to a second backup port, and the demineralized water interface comprises a demineralized water connecting pipe and an interface flange.
6. The vertical rotary-film deaerator of claim 1, characterized in that the steam-water separator interface comprises a steam-water separator connected to the upper end of the body, a connecting flange connected to the steam-water separator, and the steam exhaust port is located at the upper portion of the connecting flange and is provided with a flange structure.
7. The vertical cyclone film deaerator of claim 1, wherein the safety valve port comprises an output pipe connected to the body, an output flange connected to the output pipe, and a diagonal beam having two ends connected to the body and the output pipe, respectively.
8. The vertical rotary film deaerator as claimed in any one of claims 1 to 7, wherein the body is further provided with a pressure gauge and a pressure signal interface, and the body is further provided with a temperature gauge and a thermal resistance interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021946017.3U CN213237484U (en) | 2020-09-08 | 2020-09-08 | Vertical rotary-film deaerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021946017.3U CN213237484U (en) | 2020-09-08 | 2020-09-08 | Vertical rotary-film deaerator |
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| CN213237484U true CN213237484U (en) | 2021-05-18 |
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| CN202021946017.3U Active CN213237484U (en) | 2020-09-08 | 2020-09-08 | Vertical rotary-film deaerator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114014403A (en) * | 2021-11-02 | 2022-02-08 | 江苏巨衡机械有限公司 | Rotary film oxygen removing head for treating hard water supply |
-
2020
- 2020-09-08 CN CN202021946017.3U patent/CN213237484U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114014403A (en) * | 2021-11-02 | 2022-02-08 | 江苏巨衡机械有限公司 | Rotary film oxygen removing head for treating hard water supply |
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