CN106152107A - A kind of waste heat boiler deaerating type of cycles and deoxyprocess - Google Patents
A kind of waste heat boiler deaerating type of cycles and deoxyprocess Download PDFInfo
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- CN106152107A CN106152107A CN201510131740.3A CN201510131740A CN106152107A CN 106152107 A CN106152107 A CN 106152107A CN 201510131740 A CN201510131740 A CN 201510131740A CN 106152107 A CN106152107 A CN 106152107A
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Abstract
The invention discloses a kind of waste heat boiler deaerating type of cycles, including the former water supply system being sequentially connected with, film deaerating type of cycles, boiler feed pump and waste heat boiler；Described film deaerating type of cycles, including several film filters connected by tubing, the online oxygen analyzer in tubing, and the vacuum pump being connected with described film filter；And disclose the concrete structure of film filter.Additionally providing a kind of waste heat boiler deoxyprocess, current are entered from water inlet by former water supply system simultaneously, by water distributor, hollow-fibre membrane, dividing plate and collector pipe, flow out from outlet；Under vacuum, it is aided with nitrogen and enters purging, the film silk of the gas permeation hollow-fibre membrane in water body from air inlet, inside film silk, taken away by vacuum pump.Present invention film deaerating type of cycles replaces conventional thermal de-aeration, can separate the dissolved oxygen in boiler feedwater well, makes dissolved oxygen content be up to state standards the level required, boiler feedwater dissolved oxygen is generally 50～70ppb.
Description
Technical field
The present invention relates to boiler deoxidizing method field, be specifically related to deaerating type of cycles and the deoxyprocess of a kind of waste heat boiler.
Background technology
In the industry such as boiler, power plant, the existence of dissolved oxygen is cause that heat power equipment (such as boiler, steam turbine etc.) corrodes main
Reason.Because dissolved oxygen is the most active, meeting heavy corrosion hardware, cause boiler running or disabling
The oxygen corrosion of period.So the make-up water dissolved oxygen of boiler has also been made respective specified by country.Such as according to GB1576-2001
" Industrial Boiler water quality ": the boiler rating boiler more than 6T/H is intended to deoxygenation.The rated capacity pot less than 6T/H
Stove should be tried one's best deoxygenation.And the boiler feedwater dissolved oxygen content of below 16.MPa is necessarily less than 100ppb.1.6～2.5MPa
Boiler and the boiler feedwater oxygen content for steam turbine vapour are necessarily less than 50ppb, and the dissolved oxygen content of general high voltage boiler needs
Less than 7ppb.Therefore deoxidation step is the requisite important process of boiler feedwater.
What conventional boiler deoxyprocess was conventional has 5 kinds, is generally adopted by dosing and heating power two ways.Dosing technique is because grasping
Make instability, boiler blow-off can be caused, and sewer pollutes the environment (diamine can cause draining ammonia nitrogen to exceed standard), the most just
Gradually it is being eliminated.It is not repeated herein.Thermal de-aeration is usually the standard configuration of boiler.
The principle of thermal de-aeration is to reduce along with the rising of temperature according to gas meltage in water.When water temperature arrives 100 DEG C
Time, air differential pressure drop is as low as zero, and according to Henry's law, the quantity of dissolved gas in water also should be reduced to zero.Principle accordingly, wanting
The water of deoxygenation is heated to uniform temperature, makes the gas in water parse, and discharges oxygen-eliminating device with residual air, to reach the mesh of deoxygenation
's.Water after thermal de-aeration will not increase salinity, also will not increase other gas meltages, and operation controls relatively easy, is
Apply most a kind of deoxidation methods at present.But there is also some problems in actual applications.First after thermal de-aeration
Soft water water temperature is higher, easily reaches the vapourizing temperature before boiler feed pump, causes feedwater to be easily vaporized in course of conveying.Pot
The cavitation of stove feed pump is the most just because what thermal de-aeration above caused.Secondly when thermic load variation is frequent, steam consumption
Being difficult to follow in time feedback, deoxygenation water temperature changes greatly, and deaerating effect is bad.3rd, this deoxidation method requires that equipment is high
Position is arranged, adds capital expenditure, designs, installs inconvenience.4th so that boiler increases from steam consumption, decrease effectively
Outer steam supply.According to heat balance, boiler heating power deoxygenation consumable vapour reaches the 13% of its ability of steaming.Its flow chart is shown in Fig. 1.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is to provide the deaerating type of cycles of the low waste heat boiler of a kind of equipment cost.
The technical scheme is that, a kind of waste heat boiler deaerating type of cycles, including the former water supply system being sequentially connected with, film deoxygenation
System, boiler feed pump and waste heat boiler；
Described film deaerating type of cycles, including several film filters connected by tubing, the online oxygen analyzer in tubing,
And the vacuum pump being connected with described film filter；
Described film filter is tubular structure, and bottom is provided with water inlet, and top is provided with outlet；Described water inlet and a water distributor
Connecting, described outlet and a collector pipe connect, and between described water distributor and described collector pipe, are provided with a dividing plate；Described film mistake
The internal two ends up and down of filter are provided with film silk filter element, are provided with hollow-fibre membrane between the film silk filter element at described upper and lower two ends；Described film mistake
Filter is provided with air inlet and gas outlet.
Wherein, described former water supply system is connected with the water inlet of described film filter by security personnel's filter.
Wherein, the air inlet of described film filter is connected with Nitrogen pipe network.
Wherein, described film silk filter element is hydrophobic macromolecular material.
Further, described film silk filter element is woven filamentation cloth-like by film silk, then is rolled into tubular by silk cloth.
Present invention also offers a kind of waste heat boiler deoxyprocess of said system, described current by former water supply system from water inlet
Mouth enters, and by water distributor, hollow-fibre membrane, dividing plate and collector pipe, flows out from described outlet；Under vacuum, auxiliary
Purge from the entrance of described air inlet with nitrogen, the film silk of the gas permeation hollow-fibre membrane in water body, inside described film silk, quilt
Vacuum pump is taken away；The intake pressure of described former water supply system controls at 0.15-0.6MPA.
Waste heat boiler deoxyprocess according to the present invention, it is preferred that described vacuum condition is more than vacuum 50 torr.
Waste heat boiler deoxyprocess according to the present invention, it is preferred that described nitrogen admission pressure≤0.07Mpa.
Waste heat boiler deoxyprocess according to the present invention, it is preferred that described film silk filter element is hydrophobic macromolecular material.
Waste heat boiler deoxyprocess according to the present invention, it is preferred that described film silk filter element by film silk weave filamentation cloth-like, then by
Silk cloth is rolled into tubular.
The present invention is technically characterized by comprising the steps as follows:
A, the present invention use knitting skill, and film silk is woven filamentation cloth, and silk cloth is wound into column, load putamina, this technology
Expanding effective contact area of catalyst, meanwhile, every film silk is all fixed, and has fracture of wire phenomenon hardly, it is ensured that system
Stable effluent quality；
Meanwhile, central dividing plate and central canal water distribution, make liquid become jet state on the surface of film silk, effectively improve runner,
Improve mass-transfer efficiency；
B, the film filter of the present invention have splendid hydrophobicity, it is ensured that liquid will not be revealed through film silk, and its hydrophobic life-span is high
Reach more than 5 years (pure water field), save equipment replacement cost for user；
C, the membranous system film itself realizing gas-to-liquid contact do not possess selectivity, and as just the interface of gas-to-liquid contact, biphase
The both sides of film rely on to spread and realize separating the material generally used: hydrophobic macromolecular material such as PP, PTFE etc., have
The fluid-tight characteristic of gas；
D, gas are in dissolving in water body, until it reaches balance；
E, gas phase apply evacuation or auxiliary gas purging break dissolution equilibrium；
F, under the effect of vacuum pump, it is provided that the driving force that gas shifts to gas phase from liquid phase.
The invention has the beneficial effects as follows:
Present disclosure mainly designs a set of waste heat boiler that can be suitably used for moisture film deoxyprocess, at home, utilizes degassing
Film manufactures boiler feed deaerator (film oxygen-eliminating device) and still belongs to the first.
1, design suitable membrane module, make film have splendid hydrophobicity, it is ensured that liquid will not be revealed through film silk, and it is dredged
The water life-span is up to more than 5 years；
2, design membrane deaerating type of cycles, mainly comprises cartridge filter, deaerating membrane assembly, vacuum pump, online oxygen analyzer,
Tubing etc.；
3, reliable old boiler system reform scheme is formed.Film oxygen-eliminating device is placed on thermal deaerator in the design phase by this project
Before, realize connecting with thermal deaerator, it is ensured that even if failure can also allow thermal deaerator realize standby reliable scheme.
After thermal deaerator is changed and to be placed on regulation valve by the debugging stage, it is ensured that the balance of system pressure, the most any to existed system
Impact.These actual achievements provide the experience of preciousness to following film Retrofit of Deaerator；Finally, we are to substitute completely with film oxygen-eliminating device
Thermal deaerator；
4, utilize degassing film to manufacture boiler feed deaerator (film oxygen-eliminating device) and still belong to the first.For the first time degassing film is successfully removed
Dissolved oxygen in boiler feedwater, makes oxygen content be less than 100ppb, and be up to state standards requirement.
5, boiler feedwater film oxygen-eliminating device belongs to energy-conserving product, has promotional value.From field measurement data, the energy of film oxygen-eliminating device
Consumption is only the 7% of thermal deaerator.Promoting film oxygen-eliminating device can be that energy-saving and emission-reduction are contributed.
The present invention can separate the dissolved oxygen in boiler feedwater well, make dissolved oxygen content be up to state standards require level,
Boiler feedwater dissolved oxygen is generally 50～70ppb.
Accompanying drawing explanation
Fig. 1 is existing thermal de-aeration flow chart.
Fig. 2 is inventive film deoxyprocess flow chart.
Fig. 3 is film Deaerator Structure schematic diagram.
Fig. 4 is film deaerating type of cycles schematic diagram.
In Fig. 3,1-water inlet, 2-outlet, 3-gas outlet, 4-air inlet, 5-film silk filter element, 6-water distributor, 7-hollow is fine
Dimension film, 8-dividing plate, 9-collector pipe, 10-shell.
In Fig. 4, a-cartridge filter, b-gas-liquid separator, the online dissolved oxygen meter of c-, d-film filter, e-vacuum pump.
Detailed description of the invention
As in figure 2 it is shown, the present invention includes former water supply system, film deaerating type of cycles, boiler feed pump and the waste heat boiler being sequentially connected with
Stove.
Described film deaerating type of cycles, including several film filters connected by tubing, the online oxygen analyzer in tubing,
And the vacuum pump being connected with described film filter.The structural representation of film deaerating type of cycles is shown in Fig. 4.
Described film filter is tubular structure, and bottom is provided with water inlet 1, and top is provided with outlet 2；Water inlet 1 and a water distribution
Pipe 6 connects, and outlet 2 is connected with a collector pipe 8, at water distributor 6 and described catchment between 9 pipes, is provided with a dividing plate 8；Institute
State the internal two ends up and down of film filter and be provided with film silk filter element 5, between the film silk filter element 5 at upper and lower two ends, be provided with hollow-fibre membrane 7；
Described film filter is provided with air inlet 4 and gas outlet 3.Fig. 3 is shown in by the structure chart of film filter.
As shown in Figure 4, described former water supply system is connected with the water inlet of described film filter by security personnel's filter.Membrane filtration
The air inlet of device is connected with Nitrogen pipe network.Film deaerating type of cycles includes cartridge filter a, gas-liquid separator b, online dissolved oxygen meter c,
Several film filters d and vacuum pump e.By the process of film deaerating type of cycles, the deoxygenated water finally given to boiler feed pump,
Waste gas is emptied by gas-liquid separator, waste water to blowdown point.
In a preferred embodiment, described film silk filter element is hydrophobic macromolecular material, ventilative and waterproof.
Film silk filter element is woven filamentation cloth-like by film silk, then is rolled into tubular by silk cloth.
In the waste heat boiler deoxyprocess of the present invention, described current are entered from water inlet by former water supply system, pass through water distribution
Pipe, film silk filter element, hollow-fibre membrane, dividing plate and collector pipe, flow out from described outlet；Under vacuum, it is aided with nitrogen
Enter purging, the air penetrating film silk in water body from described air inlet, inside film silk, taken away by vacuum pump；Described former water supplies
The intake pressure answering system controls at 0.15-0.6MPA.
Vacuum condition is more than vacuum 50 torr.
Nitrogen admission pressure≤0.07Mpa.
The present invention can separate the dissolved oxygen in boiler feedwater well, make dissolved oxygen content be up to state standards require level,
Boiler feedwater dissolved oxygen is generally 50～70ppb.
Claims (10)
1. a waste heat boiler deaerating type of cycles, it is characterised in that: the former water supply system that includes being sequentially connected with, film deaerating type of cycles,
Boiler feed pump and waste heat boiler；
Described film deaerating type of cycles, including several film filters connected by tubing, the online oxygen analyzer in tubing,
And the vacuum pump being connected with described film filter；
Described film filter is tubular structure, and bottom is provided with water inlet, and top is provided with outlet；Described water inlet and a water distributor
Connecting, described outlet and a collector pipe connect, and between described water distributor and described collector pipe, are provided with a dividing plate；Described film mistake
The internal two ends up and down of filter are provided with film silk filter element, are provided with hollow-fibre membrane between the film silk filter element at described upper and lower two ends；Described film mistake
Filter is provided with air inlet and gas outlet.
A kind of waste heat boiler deaerating type of cycles the most according to claim 1, it is characterised in that described former water supply system leads to
Cross security personnel's filter to be connected with the water inlet of described film filter.
A kind of waste heat boiler deaerating type of cycles the most according to claim 1, it is characterised in that the air inlet of described film filter
Mouth is connected with Nitrogen pipe network.
A kind of waste heat boiler deaerating type of cycles the most according to claim 1, it is characterised in that described film silk filter element is hydrophobic
The macromolecular material of property.
5. according to a kind of waste heat boiler deaerating type of cycles described in claim 1 or 4, it is characterised in that described film silk filter element by
Film silk braiding filamentation cloth-like, then it is rolled into tubular by silk cloth.
6. a kind of waste heat boiler deoxyprocess of system described in claim 1, it is characterised in that: current are by former water supply system
Unite and enter from water inlet, by water distributor, hollow-fibre membrane, dividing plate and collector pipe, flow out from described outlet；At vacuum bar
Under part, being aided with nitrogen and enter purging from described air inlet, the film silk of the gas permeation hollow-fibre membrane in water body, to described film silk
Inner side, is taken away by vacuum pump；
The intake pressure of described former water supply system controls at 0.15-0.6MPA.
Waste heat boiler deoxyprocess the most according to claim 6, it is characterised in that described vacuum condition is vacuum 50
More than torr.
Waste heat boiler deoxyprocess the most according to claim 6, it is characterised in that described nitrogen admission pressure≤
0.07Mpa。
Waste heat boiler deoxyprocess the most according to claim 6, it is characterised in that described film silk filter element is hydrophobic
Macromolecular material.
Waste heat boiler deoxyprocess the most according to claim 6, it is characterised in that described film silk filter element is woven by film silk
Filamentation cloth-like, then it is rolled into tubular by silk cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510131740.3A CN106152107A (en) | 2015-03-24 | 2015-03-24 | A kind of waste heat boiler deaerating type of cycles and deoxyprocess |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510131740.3A CN106152107A (en) | 2015-03-24 | 2015-03-24 | A kind of waste heat boiler deaerating type of cycles and deoxyprocess |
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| CN106152107A true CN106152107A (en) | 2016-11-23 |
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| CN201510131740.3A Pending CN106152107A (en) | 2015-03-24 | 2015-03-24 | A kind of waste heat boiler deaerating type of cycles and deoxyprocess |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179728A (en) * | 2018-11-05 | 2019-01-11 | 华电水务膜分离科技（天津）有限公司 | A kind of deoxidation air film system for plant gas demineralized water dilatation |
| CN110749641A (en) * | 2019-11-04 | 2020-02-04 | 盐城工学院 | Sensor for monitoring nitrate concentration in water body in real time |
| CN111348710A (en) * | 2018-12-21 | 2020-06-30 | 核动力运行研究所 | Device and method for removing dissolved radioactive gas |
| WO2022160667A1 (en) * | 2021-01-26 | 2022-08-04 | 上海优华系统集成技术股份有限公司 | Zero steam consumption deaeration system |
| CN115893561A (en) * | 2023-02-19 | 2023-04-04 | 连云港西子环保设备有限公司 | Membrane method vacuum deaerator |
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| RU2225962C2 (en) * | 2002-05-18 | 2004-03-20 | Трифонов Николай Николаевич | Deaerator |
| CN102765772A (en) * | 2012-07-30 | 2012-11-07 | 上海市张江高科技园区新能源技术有限公司 | Boiler water-feeding deoxidizing device and boiler water-feeding deoxidizing method |
| CN103058308A (en) * | 2013-01-14 | 2013-04-24 | 山东中宇环保科技有限公司 | Multi-page rolled type film contactor for removing resolvable gases in water |
| CN204201873U (en) * | 2014-10-17 | 2015-03-11 | 苏州艾吉克膜科技有限公司 | A kind of boiler deoxidizing method equipment of novel energy-conserving |
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2015
- 2015-03-24 CN CN201510131740.3A patent/CN106152107A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2225962C2 (en) * | 2002-05-18 | 2004-03-20 | Трифонов Николай Николаевич | Deaerator |
| CN102765772A (en) * | 2012-07-30 | 2012-11-07 | 上海市张江高科技园区新能源技术有限公司 | Boiler water-feeding deoxidizing device and boiler water-feeding deoxidizing method |
| CN103058308A (en) * | 2013-01-14 | 2013-04-24 | 山东中宇环保科技有限公司 | Multi-page rolled type film contactor for removing resolvable gases in water |
| CN204201873U (en) * | 2014-10-17 | 2015-03-11 | 苏州艾吉克膜科技有限公司 | A kind of boiler deoxidizing method equipment of novel energy-conserving |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179728A (en) * | 2018-11-05 | 2019-01-11 | 华电水务膜分离科技（天津）有限公司 | A kind of deoxidation air film system for plant gas demineralized water dilatation |
| CN111348710A (en) * | 2018-12-21 | 2020-06-30 | 核动力运行研究所 | Device and method for removing dissolved radioactive gas |
| CN110749641A (en) * | 2019-11-04 | 2020-02-04 | 盐城工学院 | Sensor for monitoring nitrate concentration in water body in real time |
| WO2022160667A1 (en) * | 2021-01-26 | 2022-08-04 | 上海优华系统集成技术股份有限公司 | Zero steam consumption deaeration system |
| CN115893561A (en) * | 2023-02-19 | 2023-04-04 | 连云港西子环保设备有限公司 | Membrane method vacuum deaerator |
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 2004-2002 Weisan Road Chemical Office Building, Baoshan District, Shanghai Applicant after: Baowu Carbon Material Technology Co., Ltd. Applicant after: SUZHOU EDGECROSS MEMBRANE TECHNOLOGY CO., LTD. Address before: 2004-2002 Weisan Road Chemical Office Building, Baoshan District, Shanghai Applicant before: Chemical Co., Ltd. of Baoshan Iron and Steel Group, Shanghai Applicant before: SUZHOU EDGECROSS MEMBRANE TECHNOLOGY CO., LTD. |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161123 |
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| RJ01 | Rejection of invention patent application after publication |