CN204593352U - A kind of coal-burning power plant's dust collector ash hopper heating steam recycling system - Google Patents
A kind of coal-burning power plant's dust collector ash hopper heating steam recycling system Download PDFInfo
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- CN204593352U CN204593352U CN201520230878.4U CN201520230878U CN204593352U CN 204593352 U CN204593352 U CN 204593352U CN 201520230878 U CN201520230878 U CN 201520230878U CN 204593352 U CN204593352 U CN 204593352U
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Abstract
The utility model discloses a kind of coal-burning power plant's dust collector ash hopper heating steam recycling system, comprise ash bucket steam-heated pipe line system, determine draining pipeline system, seven sections of water back systems of drawing gas, ash bucket Steam Recovery utilize pipe-line system; Ash bucket steam-heated pipe line system is provided with electric precipitation ash bucket and steam heater; Determine draining pipeline system is provided with and determine row's flash vessel, seven sections of water back systems of drawing gas are provided with No. 2 low-pressure heaters and low plus hydrophobic case; Each described pipe-line system being all provided with motor regulated valve and manually-operated gate, for controlling input and the excision of each pipe-line system, and controlling the steam consumption to ash bucket heating; The utility model is that ash bucket heating steam is recycled and provides that a kind of structure is simple, the system of flexible and convenient operation, and ash bucket Steam Heating mode can be made to meet double design requirement that is energy-conservation and environmental protection simultaneously.
Description
Technical field
The utility model relates to recovery and utilization technology field after a kind of Steam Heating, particularly a kind of adopt steam to heat coal-burning power plant's dust collector ash hopper after recycling system.
Background technology
The dedusting of current coal-fired power plant generally adopts the modes such as electric cleaner, sack cleaner or electric-bag complex dust collector.The effect of deduster is flutterred by the dust in flue gas to catch collection, then by rapping or blowback method, allows dust fall to be arranged in the ash bucket of deduster bottom, carry out of short duration storage.When the ash stored in ash bucket reach a certain height, then by pressure air pump, dust is transported to grey storehouse through malleation concentrated phase ash-transmission system.
Ash stored by the smooth and easy output of ash bucket is the guarantee that deduster normally runs.The security incidents such as defeated ash freely will not cause the stifled ash of deduster, dust emission exceeds standard.Therefore, ash bucket blocks up ash has become the one of the main reasons causing plant dust catcher to be stopped transport.Existing research and operating experience all show, when ash bucket temperature is higher than flue gas dew point, can avoids the adhesion of dust, compression or caking and cause blocking up ash, spraying grey phenomenon.On the other hand, the temperature of ash is higher, and the mobility of ash is stronger, and it is also easier that conveying is got up.For these reasons, for ensureing the normal ash discharge of ash bucket energy, unimpeded, do not block, ash bucket ring shaped heating mechanism is installed at the lower periphery of dust collector ash hopper usually by each coal-burning power plant, its effect mainly makes the temperature in ash bucket be not less than flue gas dew point, avoids the adhesion of dust, compression or caking and causes stifled ash.The mode of heating of ash bucket generally has two kinds: one is electrical heating, and namely utilize electric heater to convert electric energy to heat energy and carry out local heat to ash bucket, the energy consumption of which is large; The second is Steam Heating, namely draws a part of high-temperature hot steam from steam turbine or other high-temperature steam sources, flows into the coil heater be close on ash bucket outer wall, carries out local heat to ash bucket.Steam Heating is existing comparatively general mode of heating.
Zhanjiang Power Plant 4 300MW unit dust collector ash hoppers add pyrogen and adopt Electric heating, and power consumption is large, and fault rate is high, and maintenance workload is large.Often occur that electric heater fault is not thrown, the temperature of ash bucket is on the low side, causes indivedual ash bucket dust stratification, full ash, causes the tripping operation of corresponding electrical equipment.It has been decided through consideration, change ash bucket heater into Steam Heating mode by Electric heating.That is, ash bucket adopts surface-type spiral heater, draws the female pipe steam supply of auxiliary steam and heats.This technological transformation not only reduces the fault rate of ash bucket heating aspect, ensure that the temperature of ash bucket is at about 110 DEG C, also ensure that the normal defeated ash of ash bucket and the safe operation of deduster.
But just consider that when first transformation the steam supply drawing the female pipe of auxiliary steam heats, do not consider to heat being recycled of rear steam, the steam back-steam of ash bucket heating is directly discharged to be determined row's flash vessel and drains, and causes the waste of a large amount of carbonated drink, causes the make-up water percentage of unit to remain high.Through experimental test, every platform unit ash bucket heating steam consumption is approximately 2.5t/h, and 4 units increase moisturizing about 240 tons every day.In addition, the ash bucket heating back-steam temperature emitted, still up to about 120 DEG C, also result in a large amount of thermal waste.In order to reduce waste of steam and reduce unit make-up water percentage, often adopt and be interrupted steam supply way, but cause indivedual ash bucket clogging phenomenon sometimes.Along with environmental protection index is more and more tighter, after 1 day July in 2014, the dedusting discharge value of unit is 30mg/m
3below, close to dust emission limit value, environmental protection pressure is increasing, may cause unit outage when discharge exceeds standard serious.Therefore, the input of ash bucket heating steam must be ensured, ensure the safe operation of the defeated ash of ash bucket and deduster.
In a word, existing ash bucket Steam Heating mode can not take into account double requirements that is energy-conservation and environmental protection, in the urgent need to making improvements.
Utility model content
The purpose of this utility model is to avoid the weak point in above-mentioned background technology, and a kind of coal-burning power plant's dust collector ash hopper heating steam recycling system is provided, double design requirement that is energy-conservation and environmental protection can be met to realize existing ash bucket Steam Heating mode simultaneously.
For realizing this double requirements that is energy-conservation and environmental protection, the Steam Recovery that also ash bucket can be heated is to condenser, but which not only can cause steam heat to lose, and if this road back-steam also can affect the vacuum of unit containing partial air, affect the economy of generating set.
Contrasted by steam parameter, the back-steam after discovery auxiliary steam heats ash bucket and unit seven sections of parameter similar that draw gas, as shown in table 1.
Table 1
| Project name | Temperature/(DEG C) | Pressure/(MPa. is exhausted) | Flow/(t/h) | Remarks |
| Auxiliary steam heats back-steam to ash bucket | 120 | 0.15~0.2 | 2~3 | Single unit |
| Unit seven sections draws gas | 133.6 | 0.13~0.14 | 24.8 | Single unit |
As can be seen here, the best recycling method of ash bucket steam is, using the heating steam of the back-steam after ash bucket heating as #2 low-pressure heater, the hydrophobic of generation drains into low plus hydrophobic case.
Energy-conservation with environmental protection double requirements for realizing, and solve the problems of the technologies described above, the ash bucket heating steam way of recycling that the utility model adopts is: to the pipeline surely arranging flash vessel, pick out a road steam pipe at electric precipitation ash bucket heating back-steam, access seven sections to draw gas to (as far as possible near the porch of No. 2 low-pressure heater steam) on the heating admission pipeline of No. 2 low-pressure heaters, ash bucket is heated back-steam and recycles.Utilize ash bucket to heat the condensate water of back-steam to No. 2 low-pressure heaters to heat, hydrophobicly enter low plus hydrophobic case, return in the condensate system of No. 2 low-pressure heaters outlets through low-pressure heater and drainage pump, thus realize the recycling of ash bucket heating back-steam.
The utility model specifically can be achieved by the following technical programs.
A kind of coal-burning power plant's dust collector ash hopper heating steam recycling system, comprising: ash bucket steam-heated pipe line system, carrys out steam supply heat electric precipitation ash bucket for drawing the female pipe of auxiliary steam; Determine draining pipeline system, for heating the steam after electric precipitation ash bucket discharged to air; Seven sections of water back systems of drawing gas, heat No. 2 low-pressure heaters from steam turbine seven sections of steam for drawing; The utility model also comprises ash bucket Steam Recovery and utilizes pipe-line system, carries out heat utilization again for namely heating back-steam to the steam after heating electric precipitation ash bucket; Ash bucket steam-heated pipe line system is provided with electric precipitation ash bucket and steam heater; Determine draining pipeline system is provided with and determine row's flash vessel, seven sections of water back systems of drawing gas are provided with No. 2 low-pressure heaters and low plus hydrophobic case; Each described pipe-line system being all provided with motor regulated valve and manually-operated gate, for controlling input and the excision of each pipe-line system, and controlling the steam consumption to ash bucket heating; Ash bucket Steam Recovery utilizes pipe-line system to be included in heating back-steam to the road steam pipe determining draining pipeline system picks out, and steam pipe accesses seven sections and draws gas on the heating admission pipeline of No. 2 low-pressure heaters.
Further, described ash bucket steam-heated pipe line system is provided with steam supply manually-operated gate and steam supply control valve, draw and enter from the electric precipitation ash bucket heating vapour of the female pipe of auxiliary steam the surperficial steam heater being close to electric precipitation ash bucket through described steam supply manually-operated gate and steam supply control valve, heat ash bucket, steam heater is coiled steam heater.
Further, described determine draining pipeline system is provided with determine row's manually-operated gate and surely arrange electrically operated valve, when heating back-steam cannot be recycled, steam through open determine row's manually-operated gate and surely row's electrically operated valve enter and determine row's flash vessel, be finally disposed to air.
Further, described ash bucket Steam Recovery utilizes in pipe-line system and is provided with pressure transmitter, pressure transmitter valve, hydrophobic manually-operated gate, Pressure gauge, Pressure gauge valve, lowly adds electrically operated valve, and lowly adds reverse stop valve; Annexation meets: when needs utilize the steam after heating electric precipitation ash bucket, steam after heating electric precipitation ash bucket through open low add electrically operated valve and low add reverse stop valve and seven sections of water back systems of drawing gas come enter No. 2 low-pressure heaters after vapour mixes, the condensate water of No. 2 low-pressure heaters is heated, the hydrophobic of generation enters low plus hydrophobic case, return in the condensate system of No. 2 low-pressure heater outlets through low-pressure heater and drainage pump, thus realize the recycling of ash bucket heating back-steam.
Further, output to the 2 low-pressure heater pipeline of steam heater is furnished with pressure transmitter, for pressure signal being delivered to the Distributed Control System DCS of power plant, DCS provides adjustment signal to steam supply control valve, adjust the electric precipitation heating steam consumption that the female pipe of auxiliary vapour exports, adjustment pipeline gauge pressure is 0.05MPa.
Further, described seven sections water back systems of drawing gas are provided with 7 sections of reverse stop valves and 7 sections of electrically operated valves, enter No. 2 low-pressure heaters after drawing the steam after 7 sections of reverse stop valves of seven sections of the steam turbine vapour that draw gas through opening and 7 sections of electrically operated valves and electric precipitation ash bucket, the condensate water of No. 2 low-pressure heaters is heated; When recycling the steam after heating electric precipitation ash bucket, steam enters separately No. 2 low-pressure heaters, heats its condensate water.
Further, described electrically operated valve and the low electrically operated valve that adds surely arranged for interlock, switch motion on the contrary, when low add electrically operated valve closedown time, row's electrically operated valve is opened surely, is drained into by heating back-steam fast and determines row's flash vessel.
Further, the low of heating back-steam to 2 low-pressure heater adds electrically operated valve and 7 sections of electrically operated valves interlocking close simultaneously, and prevent after 7 sections of electrically operated valves are closed, heating back-steam seals in seven sections of extraction lines.
When need exit ash bucket Steam Recovery utilize pipe-line system or generating set to stop transport, seven sections draw gas to No. 2 low-pressure heaters low add electrically operated valve close time, close ash bucket heating back-steam and lowly add electrically operated valve to this, chain ash bucket heating back-steam of opening is to surely arranging electrically operated valve, close auxiliary vapour and heat steam supply control valve to electric precipitation ash bucket heating steam supply manually-operated gate and auxiliary vapour to electric precipitation ash bucket, can the out of service and isolation by system.
Compared with prior art, the utility model has the following advantages:
1, smart structural design, adopts system that the utility model provides, can realize double requirements that is energy-conservation and environmental protection, realize the recycling of ash bucket heating steam efficiently.Avoiding the steam heat loss directly caused by ash bucket heating steam reuse to condenser, the generating set vacuum because causing containing partial air also can being avoided to decline, the problems such as the economy reduction of unit.
2, system provided by the utility model can drop into for a long time, ensure that the safe operation of deduster.After the steam that ash bucket heats reclaims, system can random groups drop into for a long time, ensure that the temperature of ash bucket maintains about 110 DEG C, be not less than flue gas dew point, avoid the adhesion of dust, compression or caking and cause clogging phenomenon, decrease the fault rate of ash bucket heating, ensure that the normal defeated ash of ash bucket and the safe operation of deduster.
3, the system cloud gray model provided is safe and reliable, can not impact unit thermodynamic system.The low electrically operated valve that adds is designed to and 7 sections of electrically operated valves interlocking close simultaneously by the utility model, surely row's electrically operated valve and the low electrically operated valve that adds also are designed to interlock, switch motion is contrary, thus effectively prevent after unit 7 sections of electrically operated valves are closed, ash bucket heating back-steam seals in seven sections of extraction lines affects unit safety operation.
4, the system automation degree provided is high, easy to operate.The utility model adopts electronic adjustment valve and electrically operated valve, facilitates the operation that system automatically drops into and excises, and automatically can adjust dedusting ash bucket heating steam consumption; Pressure signal can be delivered to the Distributed Control System DCS of power plant by pressure transmitter, and DCS provides adjustment signal to controlling adjustment door, adjusts the female pipe of auxiliary vapour and heats steam consumption to electric precipitation.
5, the ash bucket Steam Recovery provided utilizes pipe-line system simple, installation workload and plant maintenance amount few.Only need heat back-steam at dust collector ash hopper and pick out a road steam pipe to the pipeline surely arranging flash vessel, access seven sections and draw gas on the heating admission pipeline of No. 2 low-pressure heaters, and install valve additional.System is simple, and installation workload is few.Substantially non-maintaining after system comes into operation, maintenance workload is few.
6, after adopting system schema provided by the utility model to implement, to effectively improve the rate of recovery of ash bucket heating steam, reduce the make-up water percentage of unit, reclaim the heat energy of steam, save valuable freshwater resources, significant to the safety and economic operation of unit.
Accompanying drawing explanation
Fig. 1 is this practicality and the structural representation of novel a kind of coal-burning power plant's dust collector ash hopper heating steam recycling system.
In figure: 1-steam supply manually-operated gate; 2-steam supply control valve; 3-electric precipitation ash bucket; 4-steam heater;
5-arranges manually-operated gate surely; 6-arranges electrically operated valve surely; 7-arranges flash vessel surely; 8-pressure transmitter; 9-pressure transmitter valve; The hydrophobic manually-operated gate of 10-; 11-Pressure gauge; 12-Pressure gauge valve; 13-is low adds electrically operated valve; 14-is low adds reverse stop valve; 15-7 section reverse stop valve; 16-7 section electrically operated valve; 17-2 low-pressure heater; 18-low plus hydrophobic case.
Detailed description of the invention
Being described further concrete enforcement of the present utility model below in conjunction with accompanying drawing and example, if it is noted that have parts or the formation of not special detailed description below, is all that those skilled in the art can understand with reference to prior art or realize.
As an example, below the detailed description of the invention that the utility model utilizes in the Steam Recovery of Zhanjiang Power Plant 1 300MW unit dust collector ash hopper heating is described in detail.
As shown in Figure 1, be the system architecture schematic diagram of utility model.Comprise 4 pipe-line systems that are mutually related, be ash bucket steam-heated pipe line system respectively, determine draining pipeline system, ash bucket Steam Recovery utilizes pipe-line system and seven sections of water back systems of drawing gas, and the electric precipitation ash bucket 3 installed on the tubing, steam heater 4, surely flash vessel 7, No. 2 low-pressure heaters 17 and low plus hydrophobic case 18 is arranged.Described pipe-line system is provided with motor regulated valve and manually-operated gate.To facilitate system automatically drop into and excise operation, and automatically adjust the steam consumption of dust collector ash hopper heating.Connects employing welding manner with the pipeline between pipe-line system in each pipe-line system, the connection between pipeline and various motor regulated valve, manually-operated gate adopts flange connection.
Needed for scheme implementation, equipment component material refers to shown in following table 2.
Table 2
When Pipe installing walks pipe, require reasonable disposition suspension and support, walk to manage attractive in appearance.The welding requirements weld bond of pipeline is attractive in appearance, and gold inspection is qualified, No leakage.Pipeline welding all uses bottom argon arc welding, prevents the foreign material such as welding slag from entering system.
Described ash bucket steam-heated pipe line system arranges steam supply manually-operated gate 1 and steam supply control valve 2 by Flange joint.When needing to heat electric precipitation ash bucket, open the female pipe of auxiliary vapour to the steam supply manually-operated gate 1 on electric precipitation ash bucket water back, automatically drop into steam supply control valve 2, to electric precipitation ash bucket surface coiled steam heater 4 steam supply.
For convenience of maintenance, to arrange between flash vessel 7 at steam heater 4 and surely arranging and described determine draining pipeline system, arranged by Flange joint in this pipe-line system simultaneously and determine row's manually-operated gate 5 and row's electrically operated valve 6 surely.Maintenance or other cannot recycle ash bucket steam situation when occurring, open and determine row's manually-operated gate 5 and surely arrange electrically operated valve 6, by ash bucket steam back-steam to row's flash vessel 7 surely, be finally disposed to air.Closed condition is in during normal operation.
Ash bucket heating back-steam to the pipeline surely arranging flash vessel adopt nominal diameter be that the steel pipe of 50mm picks out a road steam pipe, and accessed seven sections and draw gas to (near the low porch adding steam of #2) on the heating admission pipeline of No. 2 low-pressure heaters 17, thus the ash bucket Steam Recovery described in forming utilizes pipe-line system as far as possible.And arranged by Flange joint on this system and lowly add electrically operated valve 13 and lowly add reverse stop valve 14, the nominal diameter of two kinds of valves is 50mm.During normal operation, open and lowly add electrically operated valve 13 and lowly add reverse stop valve 14, ash bucket steam mixes with seven sections of vapour that draw gas through this pipe-line system, then No. 2 low-pressure heaters 17 are entered, condensate water in it is heated, the hydrophobic of generation is discharged into low plus hydrophobic case 18, then returns in the condensate system of No. 2 low-pressure heaters 17 outlets through low-pressure heater and drainage pump.
In addition, the pipeline of ash bucket heating back-steam to 2 low-pressure heater 17 arranges pressure transmitter 8, pressure transmitter valve 9, hydrophobic manually-operated gate 10, Pressure gauge 11 and Pressure gauge valve 12.Hydrophobic manually-operated gate 10 nominal diameter is 20mm, open ash bucket heating back-steam to 2 low-pressure heater 17 low add electrically operated valve 13 before carry out hydrophobic exhaust, qualified rear closedown.The pressure signal recorded is delivered to the Distributed Control System DCS of power plant by pressure transmitter, and DCS provides adjustment signal to controlling adjustment door, and adjust the female pipe of auxiliary vapour and heat steam consumption to electric precipitation, adjustment pipeline gauge pressure is about 0.05MPa.
7 sections of reverse stop valves 15 and 7 sections of electrically operated valves 16 are provided with on draw gas water back system at seven sections.During normal operation, open this two valve, seven sections of vapour that draw gas of steam turbine enter No. 2 low-pressure heaters 17 after this pipe-line system and ash bucket steam, heat the condensate water in it.When ash bucket steam cannot be recycled, also No. 2 low-pressure heaters 17 can be entered separately.
Draw gas after 7 sections of electrically operated valves 16 close to prevent unit seven sections, ash bucket heating steam back-steam seals in seven sections of extraction lines affect generating set safe operation, and hydrophobic to surely arranging electrically operated valve 6 and the low electrically operated valve 13 that adds is designed to interlock, switch motion is contrary.The low electrically operated valve 13 that adds of ash bucket heating back-steam to 2 low-pressure heater 17 is also designed to and 7 sections of electrically operated valves 16 interlocking close simultaneously.
The flow process that puts into operation of employing this programme is:
(1), before putting into operation, opening ash bucket heating back-steam hydrophobic to surely arranging electrically operated valve 6, closing during normal operation.
(2) open ash bucket heating back-steam to 2 low-pressure heater 17 low add electrically operated valve 13 before carry out hydrophobic exhaust, qualified rear closedown.
(3) open auxiliary vapour to electric precipitation ash bucket heating steam supply manually-operated gate 1, automatically drop into auxiliary vapour to electric precipitation ash bucket heating steam supply control valve 2, to electric precipitation ash bucket steam heater steam supply.Pressure signal is delivered to power plant Distributed Control System DCS by pressure transmitter, and DCS provides adjustment signal to controlling adjustment door, and adjust the female pipe of auxiliary vapour and heat steam consumption to electric precipitation, adjustment pipeline gauge pressure is about 0.05MPa.
(4) whether check system is normal, closes ash bucket heating steam back-steam to surely arranging electrically operated valve 6, and that closes ash bucket heating steam back-steam to 2 low-pressure heater 17 lowly adds the hydrophobic manually-operated gate 10 before electrically operated valve 13, qualified rear closedown.Open the low of ash bucket heating steam back-steam to 2 low-pressure heater 17 and add electrically operated valve 13, ash bucket heating steam back-steam is recycled to No. 2 low-pressure heaters 17.Check the operation stability of No. 2 low-pressure heater 17 systems, after pressure and water level are normal, whole operating process terminates.
(5) when need exit ash bucket Steam Recovery utilize pipe-line system or generating set to stop transport, seven sections draw gas to No. 2 low-pressure heaters 17 low add electrically operated valve 13 close time, close ash bucket heating back-steam and lowly add electrically operated valve 13 to this, chain ash bucket heating back-steam of opening is to surely arranging electrically operated valve 6, close auxiliary vapour and heat steam supply control valve 2 to electric precipitation ash bucket heating steam supply manually-operated gate 1 and auxiliary vapour to electric precipitation ash bucket, can the out of service and isolation by system.
Implementation result is analyzed
After adopting such scheme enforcement, electric precipitation ash bucket heating steam yield 2.5t/h, runs 7000 hours meters per year, within 1 year, saves condensation water quantity=2.5t/h × 7000h=17500 ton, and condensed water, by value 8 yuan/t, is saved condensed water value year and is about 140,000 yuan.
The back-steam calorific value of ash bucket heating steam is 644.28kcal/kg, energy recovery amount 644.28 × 2500=1610700 Kcal/h, 1 year energy recovery amount=1610700 × 7000=11274900000 Kcal, mark coal calorific value 7000kcal/kg, amount to into mark coal amount=11274900000 ÷ 7000 ÷ 1000=1610.7 t, standard coal is by 700 yuan/t, and recovered steam amounts to the price=1610.7 × 700 ÷ 10000=112.75 ten thousand yuan of standard coal.
Therefore after a Transformation of Unit, annual income is: 14+112.75=126.75 ten thousand yuan.
Estimate 4 Transformation of Units complete after annual total revenue 126.75 × 4=507 about ten thousand yuan, can see that equipment is considerable in the transformation later economic benefit that puts into operation.
By ash bucket heating steam recycling after scheme implementation, reduce the make-up water percentage of unit, reclaimed the heat energy of steam, save valuable freshwater resources, significant to the safety and economic operation of unit.
Claims (8)
1. coal-burning power plant's dust collector ash hopper heating steam recycling system, comprising: ash bucket steam-heated pipe line system, carrys out steam supply heat electric precipitation ash bucket for drawing the female pipe of auxiliary steam; Determine draining pipeline system, for heating the steam after electric precipitation ash bucket discharged to air; Seven sections of water back systems of drawing gas, heat No. 2 low-pressure heaters from steam turbine seven sections of steam for drawing; Characterized by further comprising ash bucket Steam Recovery and utilize pipe-line system, carrying out heat utilization again for namely heating back-steam to the steam after heating electric precipitation ash bucket; Ash bucket steam-heated pipe line system is provided with electric precipitation ash bucket (3) and steam heater (4); Determine draining pipeline system is provided with and determine row's flash vessel (7), seven sections of water back systems of drawing gas are provided with No. 2 low-pressure heaters (17) and low plus hydrophobic case (18); Each described pipe-line system being all provided with motor regulated valve and manually-operated gate, for controlling input and the excision of each pipe-line system, and controlling the steam consumption to ash bucket heating; Ash bucket Steam Recovery utilizes pipe-line system to be included in heating back-steam to the road steam pipe determining draining pipeline system picks out, and steam pipe accesses seven sections and draws gas on the heating admission pipeline of No. 2 low-pressure heaters.
2. a kind of coal-burning power plant's dust collector ash hopper heating steam recycling system according to claim 1, it is characterized in that: described ash bucket steam-heated pipe line system is provided with steam supply manually-operated gate (1) and steam supply control valve (2), draw and enter from the electric precipitation ash bucket heating vapour of the female pipe of auxiliary steam the surperficial steam heater (4) being close to electric precipitation ash bucket (3) through described steam supply manually-operated gate (1) and steam supply control valve (2), heat ash bucket, steam heater (4) is coiled steam heater.
3. a kind of coal-burning power plant's dust collector ash hopper heating steam recycling system according to claim 1, it is characterized in that: described determine draining pipeline system is provided with determine row's manually-operated gate (5) and surely arrange electrically operated valve (6), when heating back-steam cannot be recycled, steam through open determine row's manually-operated gate (5) and surely arrange electrically operated valve (6) enter and determine row's flash vessel (7), be finally disposed to air.
4. a kind of coal-burning power plant's dust collector ash hopper heating steam recycling system according to claim 1, it is characterized in that: described ash bucket Steam Recovery utilizes in pipe-line system and is provided with pressure transmitter (8), pressure transmitter valve (9), hydrophobic manually-operated gate (10), Pressure gauge (11), Pressure gauge valve (12), lowly adds electrically operated valve (13), and lowly adds reverse stop valve (14); Annexation meets: when needs utilize the steam after heating electric precipitation ash bucket, steam after heating electric precipitation ash bucket through open low add electrically operated valve (13) and low add reverse stop valve (14) and seven sections of water back systems of drawing gas carry out to enter after vapour mixes No. 2 low-pressure heaters (17), the condensate water of No. 2 low-pressure heaters (17) is heated, the hydrophobic of generation enters low plus hydrophobic case (18), return in the condensate system exported to No. 2 low-pressure heaters (17) through low-pressure heater and drainage pump, thus realize the recycling of ash bucket heating back-steam.
5. a kind of coal-burning power plant's dust collector ash hopper heating steam recycling system according to claim 1 or 4, it is characterized in that: on output to 2 low-pressure heater (17) pipeline of steam heater (4), be furnished with pressure transmitter (8), for pressure signal being delivered to the Distributed Control System DCS of power plant, DCS provides adjustment signal to steam supply control valve (2), adjust the electric precipitation heating steam consumption that the female pipe of auxiliary vapour exports, adjustment pipeline gauge pressure is 0.05MPa.
6. a kind of coal-burning power plant's dust collector ash hopper heating steam recycling system according to claim 1, it is characterized in that: described seven sections water back systems of drawing gas are provided with 7 sections of reverse stop valves (15) and 7 sections of electrically operated valves (16), enter No. 2 low-pressure heaters (17) after drawing the steam after 7 sections of reverse stop valves (15) of seven sections of the steam turbine vapour that draw gas through opening and 7 sections of electrically operated valves (16) and electric precipitation ash bucket, the condensate water of No. 2 low-pressure heaters (17) is heated; When recycling the steam after heating electric precipitation ash bucket, steam enters separately No. 2 low-pressure heaters (17), heats its condensate water.
7. a kind of coal-burning power plant's dust collector ash hopper heating steam recycling system according to claim 4, it is characterized in that: described electrically operated valve (6) and the low electrically operated valve (13) that adds surely arranged is for interlock, switch motion is contrary, when low add electrically operated valve (13) close time, surely arrange electrically operated valve (6) to open, heating back-steam is drained into determine row's flash vessel (7) fast.
8. a kind of coal-burning power plant's dust collector ash hopper heating steam recycling system according to claim 1,4 or 6, it is characterized in that: the low of heating back-steam to 2 low-pressure heater (17) adds electrically operated valve (13) and 7 sections of electrically operated valves (16) interlocking close simultaneously, prevent after 7 sections of electrically operated valves (16) are closed, heating back-steam seals in seven sections of extraction lines.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413378A (en) * | 2018-04-19 | 2018-08-17 | 重庆大学 | It is a kind of to be used for steam turbine and low plus safe and stable operation system |
| CN110260294A (en) * | 2019-07-19 | 2019-09-20 | 辛亮 | Boiler body hot waste water waste heat online recycling utilizes system |
| CN113513384A (en) * | 2021-04-29 | 2021-10-19 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Dust remover ash bucket heat tracing system with injection steam extraction as heat source |
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2015
- 2015-04-17 CN CN201520230878.4U patent/CN204593352U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413378A (en) * | 2018-04-19 | 2018-08-17 | 重庆大学 | It is a kind of to be used for steam turbine and low plus safe and stable operation system |
| CN108413378B (en) * | 2018-04-19 | 2023-08-25 | 重庆大学 | System for be used for steam turbine and low safe steady operation that adds |
| CN110260294A (en) * | 2019-07-19 | 2019-09-20 | 辛亮 | Boiler body hot waste water waste heat online recycling utilizes system |
| CN110260294B (en) * | 2019-07-19 | 2024-06-11 | 吉林电力股份有限公司四平第一热电公司 | Online recycling system for waste heat of high-temperature waste water of boiler body |
| CN113513384A (en) * | 2021-04-29 | 2021-10-19 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Dust remover ash bucket heat tracing system with injection steam extraction as heat source |
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