CN105439221B - The condensing crystallizing processing system and method for a kind of boiler drum sewerage - Google Patents
The condensing crystallizing processing system and method for a kind of boiler drum sewerage Download PDFInfo
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- CN105439221B CN105439221B CN201510994516.7A CN201510994516A CN105439221B CN 105439221 B CN105439221 B CN 105439221B CN 201510994516 A CN201510994516 A CN 201510994516A CN 105439221 B CN105439221 B CN 105439221B
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- control valve
- salt
- drum
- reactor
- pressure reducing
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention belongs to power station water process and energy resource recycling technical field, the condensing crystallizing processing system and method for more particularly to a kind of boiler drum sewerage.The system is made of drum, blowdown control valve, booster pump, reactor water inlet control valve, supercritical water separate reactor, heater, pressure reducing valve I, salt discharge control valve, pressure reducing valve II and salt collection device.The present invention realizes the separation of salt, water, while realize the recycling recycled with energy of sewerage, a kind of green, pollution-free, efficient new method is provided for steam boiler continuous blowdown water process without outside plus under conditions of any catalyst.
Description
Technical field
The invention belongs to power station water process and energy resource recycling technical field, more particularly to a kind of boiler vapour
The condensing crystallizing processing system and method for packet sewerage.
Background technology
Currently, with the growth of China human mortality and the quickening of urbanization, the utilization of water resource approaches it substantially
Supply amount, water crisis phenomenon increasingly show.In addition people's life and industrial water are continuously increased, and water resource supply is difficult for
After, and water environment pollution more deteriorates.Only develop water resource recycle economy, realize cycling utilization of wastewater, could really protect
It protects water environment, cut down water pollution.
Not only quantity is big for continuous blowdown system of boiler, but also temperature, pressure are higher, and the economic value of recycling is larger.Continuously
Blowdown is also known as surface blow-off, it is desirable that the larger stove water of salt concentration is continuously excluded from drum, including iron ion, copper from
Son, potassium ion, sodium ion, carbanion and chlorion etc., to reduce the corrosion to heat power equipment.It is continuous for dum boiler
Blowdown, traditional way are to install a continuous blowdown expander additional, and sewerage carries out volume-expanding pressure-reducing, rapid shape after entering expander
Water is heated into indirect steam and being introduced into thermal deaerator or feed-tank.Remaining saturated water drains into blowdown expander
Blowdown cooling tank enters municipal drainage network with tap water hybrid cooling heel row.
The shortcomings that this method is：(a) still carry very big energy by the sewerage of blowdown expander cannot utilize,
(b) a large amount of tap water is wasted to cool down sewerage.Many power plant dum boiler does not have blowdown dilatancy in actual motion
Device or flash vessel do not come into operation, and sewerage is exhausted directly to after the cooling of blowdown cooling tank outside factory.According to《If rule》Regulation,
The normal blowdown rate of condensing power plant's boiler is no more than 1%, and the normal blowdown rate of heat-supply type thermal power plant boiler is no more than 2%.With
For 300MW condensing-type generating sets, boiler capacity 1000t/h, if blowdown rate is 1%, the water amount of blowdown of 1 year is
8.76×104T, these high temperature and pressure drum sewerage direct emissions not only cause the waste at water source, but also a large amount of Gao Pin
Potential energy is lost.
Supercritical water (Supercritical Water, abbreviation SCW) refers to temperature more than 374.15 DEG C, and pressure is more than
The water of the special state of 22.12MPa, at this time the density value of water, dielectric constant, ionic product decline, hydrogen bond reduce so that water into
For a kind of apolar medium or even the gentle physical efficiency of nonpolar organic matter with high diffusibility and excellent transmission characteristic and water with
Arbitrary proportion dissolves each other, and forms single homogeneous system, this causes solubility of the salt in supercritical water to be remarkably decreased.
Sewerage increasing temperature and pressure is above-critical state using this characteristic by the present invention, is utilized in overcritical separate reactor
Salt condensing crystallizing is precipitated in the property of supercritical water, and sewerage can be effectively treated in the present invention, to reach high-efficiency environment friendly, resource
The energy conservation and environmental protection theory of heat recovery.
Invention content
The present invention provides the condensing crystallizing processing systems and method of a kind of boiler drum sewerage, and specific technical solution is such as
Under：
A kind of condensing crystallizing processing system of boiler drum sewerage, by drum 1, blowdown control valve 2, booster pump 3, reaction
Device water inlet control valve 4, supercritical water separate reactor 5, heater 6, pressure reducing valve I 7, salt discharge control valve 8,9 and of pressure reducing valve II
Salt collection device 10 forms；The drum 1, blowdown control valve 2, booster pump 3, reactor water inlet control valve 4 and supercritical water
Separate reactor 5 is sequentially connected with, and supercritical water separate reactor 5 is coated with heater 6；Supercritical water separate reactor 5
Upper outlet is divided into two-way, and a-road-through crosses pressure reducing valve I 7 and is connected with drum 1, and a-road-through crosses pressure reducing valve II 9 and collects dress with salt
10 are put to be connected；The lower part outlet of supercritical water separate reactor 5 is connected by salt discharge control valve 8 with salt collection device 10.
The method that the condensing crystallizing processing of boiler drum sewerage is carried out using system as described above, specific steps are such as
Under：
Blowdown control valve 2, reactor water inlet control valve 4 and pressure reducing valve I 7 are opened, simultaneously close off salt discharge control valve 8 and is subtracted
Pressure valve II9；The sewerage of drum 1 is pressurizeed, pressure is increased to critical pressure 22.1MPa by blowdown control valve 2 through booster pump 3
More than, excess of imports critical separate reactor 5 of going forward side by side, heater 6 by the temperature of saliferous subcritical water be increased to 374 DEG C of critical point with
On, at this point, drum sewerage becomes above-critical state from subcritical state；
Since solubility of the salt in supercritical water drastically reduces, the salt condensing crystallizing in saliferous stove water is precipitated, and sinks
It forms sediment in 5 bottom of supercritical water separate reactor, isolated above-critical state steam is depressured through pressure reducing valve Ι 7 from saliferous stove water
Drum 1 is returned afterwards；
The salt for being deposited in 5 bottom of supercritical water separate reactor accumulates to supercritical water separate reactor (5) total volume
1/4 when, close blowdown control valve 2, booster pump 3, reactor water inlet control valve 4 and pressure reducing valve Ι 7, open pressure reducing valve II 9, adjust
Section outlet pressure is 0.1MPa, and it is 0.2MPa to adjust pressure in supercritical water separate reactor 5, closes pressure reducing valve II 9 at this time,
Salt discharge control valve 8 is opened simultaneously, the salt for being deposited in supercritical water separate reactor 5 is discharged into salt under differential pressure action receives
In acquisition means 10；
After discharge, salt discharge control valve 8 is closed, opens reactor water inlet control valve 4, blowdown control valve 2 successively, simultaneously
Start booster pump 3, open reactor steam discharge control valve 7, carry out second and recycle.
So cycle, the sewerage that this system detaches drum by discontinuity achieve the purpose that salt, water detach.
Further, for the drum sewerage after the pressurization of booster pump 3, pressure is increased to 23-24MPa.
Further, the temperature of saliferous subcritical water is increased to 380-400 DEG C by heater 6.
Beneficial effects of the present invention are：The present invention provides a kind for the treatment of effeciency is high, no pollution discharge, it is easy to operate, into
This is low, and the condensing crystallizing processing system of the supercritical water separation boiler drum sewerage of resource and energy recovery can be achieved at the same time
And method.Compared with conventional method, in present system, seldom a part of pressure energy is only lost when by pressure reducing valve, is avoided
The waste of energy, greatly improves economy.
The present invention realizes the separation of salt, water, while realize sewerage without outside plus under conditions of any catalyst
The recycling with energy is recycled, a kind of green, pollution-free, efficient new side is provided for dum boiler continuous blowdown water process
Method.
Description of the drawings
Fig. 1 is the condensing crystallizing processing system structure diagram of the boiler drum sewerage of the present invention；
The meaning of each label is in figure：1- drums, 2- blowdown control valves, 3- booster pumps, 4- reactor water inlet control valves, 5-
Supercritical water separate reactor, 6- heaters, 7- pressure reducing valves Ι, 8- salt discharge control valve, 9- pressure reducing valves II, 10- salt collect dress
It puts.
Specific embodiment
The present invention is described further below in conjunction with the accompanying drawings.
A kind of condensing crystallizing processing system of boiler drum sewerage, by drum 1, blowdown control valve 2, booster pump 3, reaction
Device water inlet control valve 4, supercritical water separate reactor 5, heater 6, pressure reducing valve I 7, salt discharge control valve 8,9 and of pressure reducing valve II
Salt collection device 10 forms；The drum 1, blowdown control valve 2, booster pump 3, reactor water inlet control valve 4 and supercritical water
Separate reactor 5 is sequentially connected with, and supercritical water separate reactor 5 is coated with heater 6；Supercritical water separate reactor 5
Upper outlet is divided into two-way, and a-road-through crosses pressure reducing valve I 7 and is connected with drum 1, and a-road-through crosses pressure reducing valve II 9 and collects dress with salt
10 are put to be connected；The lower part outlet of supercritical water separate reactor 5 is connected by salt discharge control valve 8 with salt collection device 10.
The method that the condensing crystallizing processing of boiler drum sewerage is carried out using system as described above, specific steps are such as
Under：
Blowdown control valve 2, reactor water inlet control valve 4 and pressure reducing valve I 7 are opened, simultaneously close off salt discharge control valve 8 and is subtracted
Pressure valve II 9；The continuous blowdown water of drum 1 is pressurizeed through booster pump 3 by blowdown control valve 2, and pressure is increased to 23-24MPa, and
Into supercritical water separate reactor 5, the temperature of saliferous subcritical water is increased to 380-400 DEG C by heater 6, at this point, drum
Sewerage becomes above-critical state from subcritical state；
Since solubility of the salt in supercritical water drastically reduces, the salt condensing crystallizing in saliferous stove water is precipitated, and sinks
It forms sediment in 5 bottom of supercritical water separate reactor, isolated above-critical state steam is depressured through pressure reducing valve Ι 7 from saliferous stove water
Drum 1 is returned afterwards；
The salt for being deposited in 5 bottom of supercritical water separate reactor accumulates to supercritical water separate reactor (5) total volume
1/4 when, close blowdown control valve 2, booster pump 3, reactor water inlet control valve 4 and pressure reducing valve Ι 7, open pressure reducing valve II 9, adjust
Section outlet pressure is 0.1MPa, and it is 0.2MPa to adjust pressure in supercritical water separate reactor 5, closes pressure reducing valve II 9 at this time,
Salt discharge control valve 8 is opened simultaneously, the salt for being deposited in supercritical water separate reactor 5 is discharged into salt under differential pressure action receives
In acquisition means 10；
After discharge, salt discharge control valve 8 is closed, opens reactor water inlet control valve 4, blowdown control valve 2 successively, simultaneously
Start booster pump 3, open reactor steam discharge control valve 7, carry out second and recycle.
So cycle, the sewerage that this system detaches drum by discontinuity achieve the purpose that salt, water detach.
Claims (3)
- A kind of 1. method of the condensing crystallizing processing of a kind of boiler drum sewerage, which is characterized in that the method is based on pot What the condensing crystallizing processing system of stove drum sewerage carried out, the system is by drum (1), blowdown control valve (2), booster pump (3), reactor water inlet control valve (4), supercritical water separate reactor (5), heater (6), pressure reducing valve I (7), salt discharge control valve (8), pressure reducing valve II (9) and salt collection device (10) composition；It is the drum (1), blowdown control valve (2), booster pump (3), anti- Device water inlet control valve (4) and supercritical water separate reactor (5) is answered to be sequentially connected with, supercritical water separate reactor (5) outer cladding Having heaters (6)；The upper outlet of supercritical water separate reactor (5) is divided into two-way, and a-road-through crosses pressure reducing valve I (7) and drum (1) it is connected, a-road-through crosses pressure reducing valve II (9) and is connected with salt collection device (10)；The lower part of supercritical water separate reactor (5) Outlet is connected by salt discharge control valve (8) with salt collection device (10)；The method is as follows：Open blowdown control valve (2), reactor water inlet control valve (4) and pressure reducing valve I (7), simultaneously close off salt discharge control valve (8) and Pressure reducing valve II (9)；The sewerage of drum (1) is pressurizeed, pressure is increased to critical pressure by blowdown control valve (2) through booster pump (3) The temperature of saliferous subcritical water is increased to by more than power 22.1MPa, excess of imports critical separate reactor (5) of going forward side by side, heater (6) 374 DEG C of critical point or more, at this point, drum sewerage becomes above-critical state from subcritical state；Since solubility of the salt in supercritical water drastically reduces, the salt condensing crystallizing in saliferous stove water is precipitated, and is deposited in Supercritical water separate reactor (5) bottom, isolated above-critical state steam is depressured through pressure reducing valve Ι (7) from saliferous stove water Drum (1) is returned afterwards；The salt for being deposited in supercritical water separate reactor (5) bottom accumulates to supercritical water separate reactor (5) total volume When 1/4, blowdown control valve (2), booster pump (3), reactor water inlet control valve (4) and pressure reducing valve Ι (7) are closed, opens pressure reducing valve II (9), adjusting outlet pressure are 0.1MPa, and it is 0.2MPa to adjust pressure in supercritical water separate reactor (5), close subtract at this time Pressure valve II (9), while salt discharge control valve (8) is opened, the salt of supercritical water separate reactor (5) will be deposited under differential pressure action Class is discharged into salt collection device (10)；After discharge, salt discharge control valve (8) is closed, opens reactor water inlet control valve (4), blowdown control valve (2) successively, together Shi Qidong booster pumps (3) open reactor steam discharge control valve (7), carry out second and recycle.
- 2. according to the method described in claim 1, it is characterized in that, the drum sewerage through booster pump (3) pressurization after, pressure It is increased to 23-24MPa.
- 3. according to the method described in claim 1, it is characterized in that, the temperature of saliferous subcritical water is increased to by heater (6) 380-400℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510994516.7A CN105439221B (en) | 2015-12-25 | 2015-12-25 | The condensing crystallizing processing system and method for a kind of boiler drum sewerage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510994516.7A CN105439221B (en) | 2015-12-25 | 2015-12-25 | The condensing crystallizing processing system and method for a kind of boiler drum sewerage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105439221A CN105439221A (en) | 2016-03-30 |
| CN105439221B true CN105439221B (en) | 2018-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510994516.7A Expired - Fee Related CN105439221B (en) | 2015-12-25 | 2015-12-25 | The condensing crystallizing processing system and method for a kind of boiler drum sewerage |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864743A (en) * | 2016-05-26 | 2016-08-17 | 清华大学 | Pollution discharge, water and energy saving, recovery and separation device and method of steam injection boiler |
| CN113264562B (en) * | 2021-04-27 | 2022-08-09 | 西安交通大学 | Salt removing device and method for supercritical reaction of high-salinity water |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1363522A (en) * | 2001-01-08 | 2002-08-14 | 深圳市宝利达实业有限公司 | Process and equipment for supercritical desalination of sea water while providing energy |
| CN102190362A (en) * | 2011-05-12 | 2011-09-21 | 西安交通大学 | Supercritical water oxidation reaction system for obtaining heat supplemented by auxiliary fuel |
| CN202852790U (en) * | 2013-01-11 | 2013-04-03 | 山东鲁花浓香花生油有限公司 | Boiler blow-off residual heat utilization system |
| CN204550115U (en) * | 2015-03-19 | 2015-08-12 | 济南长城炼油有限责任公司 | A kind of steam drum sewage recycling device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3502819B2 (en) * | 2000-08-25 | 2004-03-02 | 石川県 | Cosmetic containing extract extracted by making it supercritical fluid and method for producing the same |
-
2015
- 2015-12-25 CN CN201510994516.7A patent/CN105439221B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1363522A (en) * | 2001-01-08 | 2002-08-14 | 深圳市宝利达实业有限公司 | Process and equipment for supercritical desalination of sea water while providing energy |
| CN102190362A (en) * | 2011-05-12 | 2011-09-21 | 西安交通大学 | Supercritical water oxidation reaction system for obtaining heat supplemented by auxiliary fuel |
| CN202852790U (en) * | 2013-01-11 | 2013-04-03 | 山东鲁花浓香花生油有限公司 | Boiler blow-off residual heat utilization system |
| CN204550115U (en) * | 2015-03-19 | 2015-08-12 | 济南长城炼油有限责任公司 | A kind of steam drum sewage recycling device |
Non-Patent Citations (1)
| Title |
|---|
| 超(近)临界水中无机盐的脱除;单祥雷;《华南理工大学学报（自然科学版）》;20071031;第33卷(第5期);第606-609,638页 * |
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| CN105439221A (en) | 2016-03-30 |
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Granted publication date: 20180622 Termination date: 20181225 |