CN204372892U - A kind of boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit - Google Patents
A kind of boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit Download PDFInfo
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- CN204372892U CN204372892U CN201420742299.3U CN201420742299U CN204372892U CN 204372892 U CN204372892 U CN 204372892U CN 201420742299 U CN201420742299 U CN 201420742299U CN 204372892 U CN204372892 U CN 204372892U
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- water
- boiler
- steam
- sodium hydroxide
- hydroxide solution
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Abstract
The utility model discloses a kind of boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit, comprise sodium hydroxide solution case, the sparge pipe of sodium hydroxide solution case to connect with aqueous phase with making up a prescription, sodium hydroxide solution case is provided with artificial dosing mouth, the outlet of described sodium hydroxide solution case is connected with dosing pump entrance through filter, dosing pump outlet is connected with boiler steam-water separator, the outlet of described boiler steam-water separator divides two-way to draw stove water sampling pipe and steam sampling pipe respectively, stove water sampling pipe is connected with steam sampling Guan Junyu in-line meter monitoring system, described in-line meter monitoring system is connected with DCS system, dosing pump is also connected with to the power supply of its power supply.Because instead of conventional phosphate dosing method, improve stove water water quality, steam quality is ensured, boiler no longer increases blowdown to optimize stove water simultaneously, serves water-saving effect on the one hand, also serves the effect of economize energy on the other hand.
Description
Technical field
The utility model relates to the stove water regulating system of ferroalloy air cooling waste heat unit, particularly relates to a kind of boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit.
Background technology
The Energy-saving Projects that current ferroalloy cogeneration is encouraged as one, country, bring very large room for improvement, but cogeneration itself is the waste heat parasitizing main explained hereafter, so have the limitation of unadjustable property and income to metallurgy industry.Current ferroalloy cogeneration Air-cooled Unit adopts stove water to add phosphate regulating system substantially, controls boiler water pump, pH value, hardness equivalence.Tertiary sodium phosphate is a kind of solid particle of white crystalline, adds its Main Function;
Prevent calcium magnesium incrustation scale.Namely in boiler, add phosphate solution, make boiler water maintain a certain amount of phosphate radical, under boiling alkali condition (ph=9---11), can there is following reaction in the calcium ion in stove water and phosphate radical;
10Ca
2++6PO
4 3ˉ+2OH
ˉ＝Ca
10(OH)
2(PO
4)
6↓
The alkali calcium phosphate that alkali calcium phosphate generates is a kind of soft grain slag, easily gets rid of with boiler blow-off, and can not be bonded on inwall and form incrustation scale.Because of the compound that alkali calcium phosphate is a kind of very indissoluble, its solubility product is very little, so when keeping a certain amount of superfluous phosphate radical in boiler water, the calcium ion content of boiler water can be made very little, not having incrustation scale and being formed.Magnesium in pot is entered in addition with feedwater
Following reaction is there is with silicate in ion in the alkaline water of boiling
3Mg
2++2SiO
3 2-+2OH
ˉ+H
2O＝3MgO·2SiO
2+2H
2O↓
It is grain slag form that reaction generates serpentine, easily gets rid of with boiler blow-off.
In prior art, ferroalloy waste heat boiler is Industrial Boiler scope, but be in operation by ferroalloy smelting cyclically-varying, it is larger that waste heat heat source fluctuations causes unit load to fluctuate, air cooling waste heat unit many employings grade II desalted water simultaneously, ≈ 0 is required to hardness of water, the stove water management mode of current employing waste heat unit and phosphate chemicals addition control, but because ferroalloy waste heat Air-cooled Unit does not have recirculated water, feed water hardness of substantially not bleeding, so the mode of kind increases salinity to stove water, load can produce the phenomenon that steam carries salt in stove water when raising, affect steam quality, adverse influence is produced to steam turbine, longtime running produces salt deposition on turbine blade, even cause the accident of " driving ".Again, the salt content in order to reach service requirement in operation can only take the means of blow-off of boiler water, has both wasted a large amount of water (demineralized water supplements), and has wasted again a large amount of heat (high-temperature-hot-water).
Utility model content
The utility model is in order to solve the problems of the technologies described above, provide a kind of boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit, improve stove water water quality, steam quality is ensured, boiler no longer increases blowdown to optimize stove water simultaneously, serve water-saving effect on the one hand, also serve the effect of economize energy on the other hand.
The utility model is achieved through the following technical solutions:
A kind of boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit, comprise sodium hydroxide solution case, the sparge pipe of sodium hydroxide solution case to connect with aqueous phase with making up a prescription, sodium hydroxide solution case is provided with artificial dosing mouth, the outlet of described sodium hydroxide solution case is connected with dosing pump entrance through filter, dosing pump outlet is connected with boiler steam-water separator, the outlet of described boiler steam-water separator divides two-way to draw stove water sampling pipe and steam sampling pipe respectively, stove water sampling pipe is connected with steam sampling Guan Junyu in-line meter monitoring system, described in-line meter monitoring system is connected with DCS system, dosing pump is also connected with to the power supply of its power supply.
Described in-line meter monitoring system comprises sample water cooling high temperature sampling rack and low temperature instrument calibration, stove water sampling pipe is connected with steam sampling Guan Junyu sample water cooling high temperature sampling rack, described sample water cooling high temperature sampling rack is connected with low temperature instrument calibration, low temperature instrument calibration is connected with DCS system, and described sample water cooling high temperature sampling rack all circulates with cooling water system with low temperature instrument calibration and is communicated with.
The outlet of described sodium hydroxide solution case is connected with the dosing pump entrance of multiple parallel connection through filter.
Described dosing pump is diaphragm metering pump.
Compared with prior art, the utility model has following useful technique effect:
The boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit that the utility model provides, by arranging sodium hydroxide solution case, thus instead of conventional phosphate dosing method, both pH value and the basicity of stove water had been adjusted, ensure again not bring new " pollution ", ensure the safe operation of unit, reduce water consumption, heat simultaneously, improve stove water water quality, steam quality is ensured, boiler no longer increases blowdown to optimize stove water simultaneously, serves water-saving effect on the one hand, also serves the effect of economize energy on the other hand.
Accompanying drawing explanation
The boiler water adjusting device structural representation for ferroalloy cogeneration Air-cooled Unit that Fig. 1 provides for the utility model.
Wherein: 1 is sodium hydroxide solution case; 2 is filter; 3 is dosing pump; 4 is power supply; 5 is boiler steam-water separator; 6 is sparge pipe; 7 is artificial dosing mouth; 8 is boiler steam-water separator extraction stove water sampling pipe; 9 is boiler steam-water separator extraction steam sampling pipe; 10 is sample water cooling high temperature sampling rack; 11 is low temperature instrument calibration; 12 is cooling water system; 13 is DCS system.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
See Fig. 1, a kind of boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit, comprise sodium hydroxide solution case 1, the sparge pipe 6 of sodium hydroxide solution case 1 to connect with aqueous phase with making up a prescription, sodium hydroxide solution case 1 is provided with artificial dosing mouth 7, dosing can adopt the artificial solid medicine that adds also can adopt liquid end product medicament, the outlet of described sodium hydroxide solution case 1 is connected with dosing pump 3 entrance of multiple parallel connection through filter 2, dosing pump 3 exports and is connected with boiler steam-water separator 5, the outlet of described boiler steam-water separator 5 divides two-way to draw stove water sampling pipe 8 and steam sampling pipe 9 respectively, stove water sampling pipe 8 and steam sampling pipe 9 are all connected with sample water cooling high temperature sampling rack 10, described sample water cooling high temperature sampling rack 10 is connected with low temperature instrument calibration 11, low temperature instrument calibration 11 is connected with the DCS system 13 of centralized control room, described sample water cooling high temperature sampling rack 10 and low temperature instrument calibration 11 all circulate with cooling water system 12 and are communicated with, dosing pump 3 is also connected with to the power supply 4 of its power supply.Wherein, sample water cooling high temperature sampling rack 10, low temperature instrument calibration 11 and cooling water system 12 form in-line meter monitoring system.Sodium hydroxide solution case 1, filter 2, dosing pump 3, power supply 4, boiler steam-water separator 5, sparge pipe 6, artificial dosing mouth 7, boiler steam-water separator extraction stove water sampling pipe 8 and boiler steam-water separator are drawn steam sampling pipe 9 and are formed medicine system.
Preferably, described dosing pump 3 is diaphragm metering pump, and accurate adjustable extent can to 1%, can the water quality of stove water in adjust operation accurately, run control convenient.
Described boiler steam-water separator 5 is the steam of boiler water and the separator of water, and saturated vapor enters superheating system dosing after separating, and saturated stove water drops to bottom heat exchanger by heat exchanger tube, rises and enter drum circulation after being heated.
Wherein, water analysis data through one-level high temperature sampling rack 10 and two grade low-temp instrument calibrations 11, can be shown by in-line meter monitoring system, and can teletransmission to the DCS system 13 of centralized control room, send by the head of a station working method or the aperture that instruction adjusts dosing pump 3.
Operation principle of the present utility model:
Sodium hydroxide solution case is supplemented to by demineralized water, then appropriate solid medicine or high concentration liquid medicine is added, open mixer mixed solution, configure sodium hydroxide solution, the medicine configured flows out to dosing pump inlet filter 2 through sodium hydroxide solution case outlet gravity flow, graininess impurity is removed through filter, finally pressurizeed by dosing pump 3 and send in boiler steam-water separator 5 according to monitoring or analysis data, medicine produces OH-in water, in water, pH value rises, stove water PH is kept to maintain between 9.2 ~ 9.7 through in-line meter monitoring system or chemical examination, the mode gone beyond the scope if occur by being interrupted dosing or adjustment chemical feeding quantity.
Meanwhile, in boiler steam-water separator, stove water is connected to sample water cooling high temperature sampling rack through probe tube, enters low temperature instrument calibration, carry out on-line checkingi to sample water after cooling, and the main project detected has: pH value, electrical conductivity (salt content) etc.; The value detected can numerical monitor also can DCS system in teletransmission to control room, send instruction to medicine system by control room, the unlatching of adjustment dosing pump or conciliation.
The utility model is applicable to ferroalloy cogeneration Air-cooled Unit, when waste heat boiler make up water treatment adopts grade II desalted water, because ferroalloy waste heat Air-cooled Unit does not have condenser, there is not industry water leakage problem, feedwater can not be mixed into hardness ions, and adopt grade II desalted water hardness requirement ≈ 0, feedwater does not have hardness substantially simultaneously, and prevent the situations such as corrosion from occurring to maintain boiler water maintenance alkalescence, substitute original phosphate medicine system.Adopt NaOH chemicals addition control stove water water quality.Use water to be connected with sodium hydroxide solution case sparge pipe owing to making up a prescription, dosing can adopt the artificial solid medicine that adds also can adopt liquid end product medicament.The medicine configured is exported to dosing pump inlet filter through liquor box, finally pressurizeed by dosing pump and send into boiler steam-water separator, medicine produces OH-in water, in water, pH value rises, stove water PH is kept to maintain between 9.2 ~ 9.7 through in-line meter monitoring system or chemical examination, in-line meter data can remote monitoring by centralized control room DCS system, the mode gone beyond the scope if occur by being interrupted dosing or adjustment chemical feeding quantity.Because NaOH basicity is strong, the salinity increased to boiler water system is little, and stove water water quality is better, and the salification of boiler heat exchange pipe and salt deposition on turbine blade situation can not occur.Because instead of conventional phosphate dosing method, improve stove water water quality, steam quality is ensured, boiler no longer increases blowdown to optimize stove water simultaneously, serves water-saving effect on the one hand, also serves the effect of economize energy on the other hand.
After adopting this invention, in operation, stove water regulates pH value, and adjustment better operation, stove water salt content is about 50mg/L simultaneously, and steam quality better reaches the requirement of steam turbine completely.Simultaneously, in operation, the blowdown flow rate of boiler reduces greatly, conventional adjustment mode requires ≯ 2% boiler capacity, the actual requirement that generally all just can reach stove water salt content to 3% ~ 5% boiler capacity, and after adopting NaOH regulative mode, substantially can maintain about 0.5% boiler capacity, reduce more than blowdown 2.5% boiler capacity, decrease the water yield and the heat of this part.The simple operation degree bring ferroalloy cogeneration enterprise and additional income are all very considerable.
Concrete, for certain ferroalloy Waste Heat Power Station engineering: the installation of this engineering is 3 9MW units, and basic data is as follows: waste heat boiler:
Operating pressure: 1.6Mpa;
Evaporation capacity: 15.4t/h;
Number of units: 9;
Water treatment technology: grade II desalted water;
Running time in year: 7200 hours.
Conventional design: add phosphate in stove, run PH and control change frequently with load fluctuation, and blowdown flow rate is opened into about 3.5% (evaporation capacity), steam sampling result of laboratory test salt content is above standard.
Utilize the present invention to design: to change NaOH in stove into and control, system pH value and basicity adopt is interrupted Adding medicine control, and operation is simple, actual blowdown controls 0.5%, in operation, stove water management is more stable, and steam sampling result of laboratory test shows, and stove water salt content is at below 50mg/L.
Two kinds of comparison of designs, save the water yield and heat estimation:
(1) save sewer 15.4 × 9 × (3.5%-0.5%)=4.158t/h, year saves the water yield 4.158 × 7200=29937.6t, grade II desalted water cost about 5 yuan/t, i.e. year using water wisely direct cost about 150,000.
(2) save heat to calculate to mark coal, saturation water enthalpy is about 115kcal/kg, and mark coal 115 × 29937.6 × 1000 ÷ 7000=491832kg=491.832t is always saved in year draining, on average calculates by 800 yuan/t, saves mark coal expense 390,000 year.(, according to 7000kcal/kg, mark coal is for amounting to average price for mark coal)
More than add up, save in year and amount to expense and be about 540,000 yuan, for economy ferroalloy cogeneration project or relatively objective.
More than show and describe general principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. the boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit, it is characterized in that, comprise sodium hydroxide solution case (1), the sparge pipe (6) of sodium hydroxide solution case (1) to connect with aqueous phase with making up a prescription, sodium hydroxide solution case (1) is provided with artificial dosing mouth (7), the outlet of described sodium hydroxide solution case (1) is connected with dosing pump (3) entrance through filter (2), dosing pump (3) outlet is connected with boiler steam-water separator (5), the outlet of described boiler steam-water separator (5) divides two-way to draw stove water sampling pipe (8) and steam sampling pipe (9) respectively, stove water sampling pipe (8) is all connected with in-line meter monitoring system with steam sampling pipe (9), described in-line meter monitoring system is connected with DCS system (13), dosing pump (3) is also connected with to the power supply (4) of its power supply.
2. the boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit according to claim 1, it is characterized in that, described in-line meter monitoring system comprises sample water cooling high temperature sampling rack (10) and low temperature instrument calibration (11), stove water sampling pipe (8) is all connected with sample water cooling high temperature sampling rack (10) with steam sampling pipe (9), described sample water cooling high temperature sampling rack (10) is connected with low temperature instrument calibration (11), low temperature instrument calibration (11) is connected with DCS system (13), described sample water cooling high temperature sampling rack (10) and low temperature instrument calibration (11) all circulate with cooling water system (12) and are communicated with.
3. the boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit according to claim 1, it is characterized in that, the outlet of described sodium hydroxide solution case (1) is connected with dosing pump (3) entrance of multiple parallel connection through filter (2).
4. the boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit according to claim 1, is characterized in that, described dosing pump (3) is diaphragm metering pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420742299.3U CN204372892U (en) | 2014-11-28 | 2014-11-28 | A kind of boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420742299.3U CN204372892U (en) | 2014-11-28 | 2014-11-28 | A kind of boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit |
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| Publication Number | Publication Date |
|---|---|
| CN204372892U true CN204372892U (en) | 2015-06-03 |
Family
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|---|---|---|---|
| CN201420742299.3U Expired - Fee Related CN204372892U (en) | 2014-11-28 | 2014-11-28 | A kind of boiler water adjusting device for ferroalloy cogeneration Air-cooled Unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485655A (en) * | 2015-11-26 | 2016-04-13 | 湖南华信稀贵科技有限公司 | Chemical adding device for bottom-blowing furnace waste heat boiler and reducing furnace waste heat boiler |
| CN107445314A (en) * | 2016-06-01 | 2017-12-08 | 鞍钢股份有限公司 | A kind of waste heat boiler water quality adjustment method |
| CN110136850A (en) * | 2019-04-04 | 2019-08-16 | 岭澳核电有限公司 | Nuclear power station steam generator Precerving liquid fills method and device |
-
2014
- 2014-11-28 CN CN201420742299.3U patent/CN204372892U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485655A (en) * | 2015-11-26 | 2016-04-13 | 湖南华信稀贵科技有限公司 | Chemical adding device for bottom-blowing furnace waste heat boiler and reducing furnace waste heat boiler |
| CN107445314A (en) * | 2016-06-01 | 2017-12-08 | 鞍钢股份有限公司 | A kind of waste heat boiler water quality adjustment method |
| CN110136850A (en) * | 2019-04-04 | 2019-08-16 | 岭澳核电有限公司 | Nuclear power station steam generator Precerving liquid fills method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20171128 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |