CN206439808U - A kind of direct current cooker starts recovery system - Google Patents
A kind of direct current cooker starts recovery system Download PDFInfo
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- CN206439808U CN206439808U CN201621375854.9U CN201621375854U CN206439808U CN 206439808 U CN206439808 U CN 206439808U CN 201621375854 U CN201621375854 U CN 201621375854U CN 206439808 U CN206439808 U CN 206439808U
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Abstract
Start recovery system the utility model discloses a kind of direct current cooker, including the feed pump being sequentially connected in series, high temperature heater (HTH), main feed valve, economizer, water-cooling wall in stove, outlet distribution header, separator, water tank, tank level control valve, the hot water end import of one plate type heat exchanger is connected with tank level control valve, the hot water of plate type heat exchanger brings out mouth and is connected with air flash vessel, air flash vessel again successively with drainage pump, condenser, condensate pump, low-temperature heater is connected, the port of export of low-temperature heater is connected with the feed pump, the cold water end import of the plate type heat exchanger is connected with the outlet of condensate pump, the cold water of plate type heat exchanger brings out mouth and is connected with the outlet of low-temperature heater, air flash vessel is provided with to idle discharge steam pipe.The utility model not only can fully reclaim the working medium and heat of activation system, and equipment investment is few, reliable, have the advantages that investment repayment is high.
Description
Technical field
The utility model is related to a kind of activation system of direct current cooker, particularly a kind of direct current cooker of achievable recuperation of heat
Activation system.
Background technology
Overcritical, ultra-supercritical boiler the activation system belonged at present in direct current cooker has two types：Air dilatation
Formula（Without BCP circulating pumps）And forced cyclic type（Band BCP pumps）；First, for atmosphere flash-off start-up system, opened in boiler controller system
Dynamic stage or underrun（Before the conversion of dry and wet state）, activation system by feed pump, high temperature heater (HTH) by the working medium of heating according to
The secondary economizer flowed through in stove, water-cooling wall, outlet distribution header, separator, the steam separated enter steam and
High temperature superheater, the liquid refrigerant separated enter air flash vessel, it is heated after be again introduced into stove, so circulation with reality
The startup of existing boiler；Working medium is most of during this（Account for the flow of BMCR operating modes 25%）Reclaimed by condenser, working medium
Heat by air flash vessel to idle discharge steam pipe discharge（And loss section division of labor matter）, its advantage and disadvantage is：
1st, advantage：Simple system is reliable, small investment, substantially without maintenance；
2nd, shortcoming：Heat loss is big, and before the conversion of boiler dry and wet state, the heat that the working medium that activation system is flowed through is carried all is damaged
Lose, and by air suspended type flash vessel gland steam exhauster meeting loss section division of labor matter, can form misty rain in gland steam exhauster near zone, damage ring
Border image；
2nd, for the forced cyclic type activation system with BCP pumps, start or the underrun stage in boiler controller system（It is dry
Before hygrometric state conversion）, the working medium flowed through is re-fed into the feed water system of boiler by BCP pumps, carries out heat and working medium by activation system
Reclaim, its advantage and disadvantage is：
1st, advantage：Before the conversion of boiler dry and wet state, activation system working medium and its heat can be all reclaimed, the thermal efficiency is high；
2nd, shortcoming：BCP circulating pump system working environments are severe（For supercritical unit, its operating pressure ~ 35MPa, work
Temperature ~ 375 DEG C）, BCP pumping systems need to be equipped with more complicated recirculating cooling water system in itself, and need to be equipped with corresponding pipeline
Valve system, and the BCP pumps country can not manufacture required import, therefore whole system arrangement is complicated, invests larger（Separate unit
BCP purchase costs surpass 5,000,000, distribution pipes, valve, after suspended support, and whole system is invested more than 11,000,000/platform stove）, secondly transport
Row maintenance cost is high, especially for regulating units, frequently enters the conversion of dry and wet state, it is too high that motor temperature often occur in BCP pumps
Caused burn-down of electric motor, so as to cause the situation of shutdown maintenance；Third, because BCP pumps are pure import critical component, and it is supplied
Goods producer is less, so its procurement cycle is longer, the demand of engineering construction can not be met at all.
The content of the invention
The purpose of this utility model is that above-mentioned not enough start there is provided a kind of direct current cooker for being directed to prior art reclaims system
System, it not only can fully reclaim the working medium and heat of activation system, and equipment investment is few, reliable, high with investment repayment
Advantage.
In order to achieve the above object, a kind of direct current cooker startup recovery system of the present utility model, including be sequentially connected in series
Feed pump, high temperature heater (HTH), main feed valve, economizer, water-cooling wall, outlet distribution header, separator, water tank, water storage in stove
Tank altitude valve, it is characterised in that the hot water end import of a plate type heat exchanger is connected with tank level control valve, board-like to change
The hot water of hot device brings out mouth and is connected with air flash vessel, air flash vessel again successively with drainage pump, condenser, condensate pump, low
Warm heater series connection, the port of export of low-temperature heater is connected with the feed pump, the cold water end import of the plate type heat exchanger and
The outlet of condensate pump is connected, and the cold water of plate type heat exchanger brings out mouth and is connected with the outlet of low-temperature heater, and air flash vessel is set
Have to idle discharge steam pipe；
The utility model flows through it by setting plate type heat exchanger between tank level control valve and air flash vessel
In hot water and condensation after be passed through condensed water in plate type heat exchanger and exchange heat, pass through the work of the condensing hot air furnace activation system of circulation
Matter and heat；Plate type heat exchanger has the advantages that heat exchange efficiency is high, is tens times of conventional shell-and-tube heat exchanger heat exchange efficiency, and
Floor space is small, and purchase cost is low, and using the working medium after hot cleaning, possesses the characteristics of working medium is peace and quiet, condensate water quality is good,
It is reliable the need for plate type heat exchanger being met；
As one kind of the present utility model preferably, water-cooling wall includes helical water-cooled wall, the transition being sequentially connected in series in the stove
Section water-cooling wall and vertical water wall；
As one kind of the present utility model preferably, the outlet of the low-temperature heater passes through oxygen-eliminating device and the feed pump phase
Even；Startup effect can be improved；
In summary, the utility model not only can fully reclaim the working medium and heat of activation system, and equipment investment is few, fortune
Row is reliable, has the advantages that investment repayment is high.
Brief description of the drawings
Fig. 1 is the system schematic of the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawings, the utility model is described in further detail.
As shown in figure 1, the direct current cooker starts recovery system, including the feed pump 1, high temperature heater (HTH) 2, main being sequentially connected in series
Water-supply valve 3, economizer 4, helical water-cooled wall 5, changeover portion water-cooling wall 6 and vertical water wall 7, outlet distribution header 8, separator 9,
Water tank 10, tank level control valve 11, the import of hot water end and the phase of tank level control valve 11 of a plate type heat exchanger 12
Even, the hot water of plate type heat exchanger 12 brings out mouth and is connected with air flash vessel 13, air flash vessel 13 again successively with drainage pump 14, cold
Condenser 15, condensate pump 16, oxygen-eliminating device 17, low-temperature heater 18 are connected, the port of export of low-temperature heater 18 and the feed pump 1
It is connected, forms circulation loop；The cold water end import of the plate type heat exchanger 12 is connected with the outlet of condensate pump 16, plate-type heat-exchange
The cold water of device 12 brings out mouth and is connected with the outlet of low-temperature heater 18, and air flash vessel 13 is provided with to idle discharge steam pipe 19；
The utility model is without using BCP pumps, by being set between tank level control valve 11 and air flash vessel 13
Put plate type heat exchanger 12, the hot water that the import of hot water end is flowed into is with entering that air flash vessel 13 is condensed afterwards, led to by the import of cold water end
The condensed water heat exchange entered, the working medium and heat of activation system can be fully reclaimed by the condensed water of circulation；Plate type heat exchanger 12 has
Have the advantages that heat exchange efficiency is high, be tens times of conventional shell-and-tube heat exchanger heat exchange efficiency, and floor space is small, purchase cost
It is low, and using the working medium after hot cleaning, possess the characteristics of working medium is peace and quiet, condensate water quality is good, plate type heat exchanger pair can be met
Reliable the need for water quality, investment repayment is high；Oxygen-eliminating device 17 can reduce it is hydrophobic in oxygen content, improve start effect.
Claims (3)
1. a kind of direct current cooker starts recovery system, including feed pump, high temperature heater (HTH), main feed valve, the province's coal being sequentially connected in series
Water-cooling wall in device, stove, outlet distribution header, separator, water tank, tank level control valve, it is characterised in that one board-like changes
The hot water end import of hot device is connected with tank level control valve, and the hot water of plate type heat exchanger brings out mouth and air flash vessel phase
Even, air flash vessel is connected with drainage pump, condenser, condensate pump, low-temperature heater successively again, the port of export of low-temperature heater
It is connected with the feed pump, the cold water end import of the plate type heat exchanger is connected with the outlet of condensate pump, plate type heat exchanger
Cold water brings out mouth and is connected with the outlet of low-temperature heater, and air flash vessel is provided with to idle discharge steam pipe.
2. a kind of direct current cooker according to claim 1 starts recovery system, it is characterised in that：Water-cooling wall bag in the stove
Include the helical water-cooled wall being sequentially connected in series, changeover portion water-cooling wall and vertical water wall.
3. a kind of direct current cooker according to claim 1 or 2 starts recovery system, it is characterised in that：The low-temperature heat
The outlet of device is connected by oxygen-eliminating device with the feed pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621375854.9U CN206439808U (en) | 2016-12-15 | 2016-12-15 | A kind of direct current cooker starts recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621375854.9U CN206439808U (en) | 2016-12-15 | 2016-12-15 | A kind of direct current cooker starts recovery system |
Publications (1)
| Publication Number | Publication Date |
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| CN206439808U true CN206439808U (en) | 2017-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621375854.9U Active CN206439808U (en) | 2016-12-15 | 2016-12-15 | A kind of direct current cooker starts recovery system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404876A (en) * | 2018-08-31 | 2019-03-01 | 神华国华清远发电有限责任公司 | A kind of activation system and starting method of ultra supercritical double reheat boiler |
| CN114396612A (en) * | 2021-11-30 | 2022-04-26 | 华能伊春热电有限公司 | Boiler water cycle deacidification desulphurization unit |
| CN114992617A (en) * | 2022-05-24 | 2022-09-02 | 东方电气集团东方锅炉股份有限公司 | System for improving economical efficiency and safety of boiler in wet operation |
| CN115899666A (en) * | 2022-10-24 | 2023-04-04 | 华电电力科学研究院有限公司 | Boiler wet water cascade utilization system under supercritical coal-fired unit deep peak shaving |
-
2016
- 2016-12-15 CN CN201621375854.9U patent/CN206439808U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404876A (en) * | 2018-08-31 | 2019-03-01 | 神华国华清远发电有限责任公司 | A kind of activation system and starting method of ultra supercritical double reheat boiler |
| CN114396612A (en) * | 2021-11-30 | 2022-04-26 | 华能伊春热电有限公司 | Boiler water cycle deacidification desulphurization unit |
| CN114992617A (en) * | 2022-05-24 | 2022-09-02 | 东方电气集团东方锅炉股份有限公司 | System for improving economical efficiency and safety of boiler in wet operation |
| CN115899666A (en) * | 2022-10-24 | 2023-04-04 | 华电电力科学研究院有限公司 | Boiler wet water cascade utilization system under supercritical coal-fired unit deep peak shaving |
| CN115899666B (en) * | 2022-10-24 | 2023-12-26 | 华电电力科学研究院有限公司 | Boiler wet water cascade utilization system under deep peak shaving of supercritical coal-fired unit |
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