CN205919308U - Forward type gas gas heater system - Google Patents
Forward type gas gas heater system Download PDFInfo
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- CN205919308U CN205919308U CN201620988506.2U CN201620988506U CN205919308U CN 205919308 U CN205919308 U CN 205919308U CN 201620988506 U CN201620988506 U CN 201620988506U CN 205919308 U CN205919308 U CN 205919308U
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Abstract
The utility model provides a forward type gas gas heater system, belongs to flue gas heat transfer technical field, the utility model discloses the effectual reduction air heater inlet smoke temperature of ability improves boiler efficiency. Oxygen -eliminating device and water tank pass through the working medium pipeline and are connected with water feed pump set foundation, water feed pump set passes through the working medium pipeline and links to each other with leading heat exchanger working medium entry, the working medium outlet of leading heat exchanger passes through working medium pipe connection to economizer, simultaneously carry out the bypass to leading heat exchanger, set up a plurality of high pressure feed water heater in the bypass, the economizer connects gradually with water -cooling wall and start -up flash tank through the working medium pipeline, while economizer and SCR denitrification facility, leading heat exchanger and air heater connect in order, it handles the process to form the flue gas, the working medium pipeline is at two branch roads of start -up flash tank punishment, be connected to next process and water storage tank respectively, it is used for connecting high pressure feed water heater simultaneously to set up the bypass to water pump group. The utility model discloses a forward type gas gas heater system can satisfy full load denitration requirement and improve boiler efficiency.
Description
Technical field
This utility model is related to a kind of smoke heat exchanger system and in particular to a kind of preposition flue gas heat exchange system of heat exchanger
System, belongs to flue gas heat exchange technical field.
Background technology
First, the environmental protection index of current domestic electrical market unit and heat consumption rate require more and more higher, for efficiently super
Critical or even double reheat power generation sets demand increasingly increases, for obtaining relatively low heat consumption index, the feed temperature phase of above unit
To higher, part engineering has reached more than 330 DEG C, so high feed temperature, due to the impact of heat transfer temperature difference, causes preheating
The cigarette temperature of device entrance can not reduce further, limits the raising further of boiler efficiency, secondly, newly-built at present efficient parameter
Extra-supercritical unit, it is contemplated that full load denitration and further reduction pre-heater inlet cigarette temperature, generally takes economizer classification
Arrangement, this arrangement structure of economizer classification is relatively easy, but the continuous improvement with feed temperature, to boiler
Safety in operation creates harmful effect, and this kind of harmful effect is mainly manifested in following two aspect: first, with feedwater temperature
The continuous improvement of degree, the difference between pre-heater inlet cigarette temperature to be reached and feed temperature is less, i.e. the heat transfer of economizer
Temperature and pressure diminish, it is possible to produce even if increasing the area of economizer nor the inlet flue gas temperature of preheater being reduced to required
Numerical value；Second, with the rising of feed temperature, after economizer classification, the area of economizer increases, and easily causes higher level's economizer
Outlet Temperature of Working too high, that is, the degree of supercooling of economizer exit and deficient enthalpy reduce, and lead to the safety of water-cooling wall to be affected；
To sum up, commonly used with domestic double reheat power generation sets, the arrangement adverse effect of economizer classification will be by
Step manifests.Therefore, it is badly in need of a kind of new structure arrangement to solve the full load denitration of efficient unit and to improve boiler efficiency.
Utility model content
The purpose of this utility model is to provide a kind of forward type smoke heat exchanger system, to solve conventional economizer classification cloth
Put the continuous improvement with feed temperature for the mode, dysgenic problem is created to the safety in operation of boiler.
It is pre- that a kind of described forward type smoke heat exchanger system includes economizer, scr denitrification apparatus, preposition heat exchanger, air
Hot device, deaerator and water tank, feedwater pump group, high-pressure heater, water-cooling wall, startup separator, water tank and working medium pipeline；
Deaerator and water tank passes through working medium pipeline and feed pump group to be set up and is connected, the pump group that feeds water by working medium pipeline with preposition
Heat exchanger working medium entrances are connected, and the sender property outlet of preposition heat exchanger is connected to economizer by working medium pipeline, simultaneously to front displacement
Hot device is bypassed, and bypass arranges multiple high-pressure heaters, and economizer passes through working medium pipeline and water-cooling wall and startup separator
It is sequentially connected, economizer and scr denitrification apparatus, preposition heat exchanger and air preheater are sequentially connected with simultaneously, form fume treatment
Operation, working medium pipeline is divided into two branch roads at startup separator, is connected respectively to subsequent processing and water tank, simultaneously to water
Pump group setting bypass is used for connecting high-pressure heater.
Preferred: to be provided with regulating valve at preposition heat exchanger working medium entrances, at sender property outlet, be provided with electronic shut-off valve.
Preferred: in the bypass of the hot device of preposition pipe, 4 high-pressure heaters to be set, each high-pressure heater is additionally provided with gland steam exhauster
Road, high-pressure heater sets up loop by gas exhaust piping, is connected to deaerator and water tank.
This utility model has the effect that saving lot of materials compared with existing product, decreases high-pressure heater
Draw gas, improve the acting ability of steam turbine it is ensured that economizer exit leaves enough degree of supercoolings and deficient enthalpy, thus ensure that
The hydrodynamic force safety of water-cooling wall in operation, is improve the inlet flue gas temperature of Benitration reactor, so that denitration is put into and do not imitated by boiler
While the restriction of rate, reduce the inlet flue gas temperature of preheater, make the inlet flue gas temperature of preheater changed by burning coal,
The restriction of variation of ambient temperature, operation deviation, feed temperature change etc., farthest can reduce according to live operating condition
Pre-heater inlet cigarette temperature, thus reducing the exhaust gas temperature of boiler, improves boiler efficiency.
Brief description
Fig. 1 is a kind of fundamental diagram of forward type smoke heat exchanger system described in the utility model；
In figure: 1- economizer, 2-scr denitrification apparatus, the preposition heat exchanger of 3-, 4- air preheater, 5- deaerator and water tank,
6- feedwater pump group, 7- high-pressure heater, 8- regulating valve, the electronic shut-off valve of 9-, 10- water-cooling wall, 11- start separator, 12- water storage
Tank, 13- working medium pipeline, 14- exhaust line.
Specific embodiment
Elaborate this utility model below according to accompanying drawing preferred embodiment.
As shown in figure 1, a kind of forward type smoke heat exchanger system described in the utility model includes economizer 1, scr denitration
Device 2, preposition heat exchanger 3, air preheater 4, deaerator and water tank 5, feedwater pump group 6, high-pressure heater 7, water-cooling wall 10, open
Flow separator 11, water tank 12 and working medium pipeline 13；
Deaerator and water tank 5 is passed through working medium pipeline 13 and is connected with feedwater pump group 6 foundation, and feedwater pump group 6 passes through working medium pipeline
13 are connected with preposition heat exchanger 3 working medium entrances, and the sender property outlet of preposition heat exchanger 3 is connected to economizer by working medium pipeline 13,
Preposition heat exchanger 3 is bypassed simultaneously, bypass arranges multiple high-pressure heaters 7, economizer 1 passes through working medium pipeline 13 and water
Cold wall 10 and startup separator 11 are sequentially connected, simultaneously economizer 1 and scr denitrification apparatus 2, preposition heat exchanger 3 and air preheat
Device 4 is sequentially connected with, and forms fume treatment operation, and working medium pipeline 13 is divided into two branch roads at startup separator 11, connects respectively
To subsequent processing and water tank 12, water pump group 6 setting bypass is used for connecting high-pressure heater 7, working medium is through hyperbaric heating simultaneously
Device 7 elevated temperature, improves the inlet flue gas temperature of scr denitrification apparatus through economizer 1, so that denitration is put into and is not limited by boiler efficiency
While, flow through preposition heat exchanger 3 using without the working medium that high-pressure heater 7 heats, the premenstrual flue gas putting heat exchanger 3 of convection current enters
Row cooling, reduces the inlet flue gas temperature of air preheater 4, so that the inlet flue gas temperature of air preheater 4 can not be become by burning coal
Change, variation of ambient temperature, run the restriction of deviation, feed temperature change etc. it is also possible to according to live operating condition at utmost
Reduction air preheater 4 inlet flue gas temperature, thus reducing the exhaust gas temperature of boiler, improve boiler efficiency.
Further: to be provided with regulating valve 8 at preposition heat exchanger 3 working medium entrances, at sender property outlet, be provided with electronic shut-off valve 9, lead to
Overregulate working medium flow to adjust the cigarette temperature of pre-heater inlet, to make the exhaust gas temperature of boiler in different ambient temperatures and not
With burning coal when all reach required value.
Further: 4 high-pressure heaters 7, each high-pressure heater 7 row of being additionally provided with are arranged on the bypass of preposition heat exchanger 3
Vapor pipeline 14, high-pressure heater 7 sets up loop by gas exhaust piping 14, is connected to deaerator and water tank 5.
Present embodiment is the exemplary illustration to this patent, does not limit its protection domain, people in the art
Member locally can also be changed to it, as long as no the spirit beyond this patent, in the protection domain of this patent.
Claims (3)
1. a kind of forward type smoke heat exchanger system it is characterised in that: include economizer (1), scr denitrification apparatus (2), front displacement
Hot device (3), air preheater (4), deaerator and water tank (5), feedwater pump group (6), high-pressure heater (7), water-cooling wall (10), open
Flow separator (11), water tank (12) and working medium pipeline (13)；
Deaerator and water tank (5) is passed through working medium pipeline (13) and is connected with feedwater pump group (6) foundation, and working medium is passed through in feedwater pump group (6)
Pipeline (13) is connected with preposition heat exchanger (3) working medium entrances, and the sender property outlet of preposition heat exchanger (3) passes through working medium pipeline (13) even
It is connected to economizer (1), bypass is arranged to preposition heat exchanger (3) simultaneously, bypass arranges multiple high-pressure heaters (7), economizer
(1) pass through working medium pipeline (13) to be sequentially connected with water-cooling wall (10) and startup separator (11), economizer (1) and scr take off simultaneously
Nitre device (2), preposition heat exchanger (3) and air preheater (4) are sequentially connected with, and form fume treatment operation, working medium pipeline (13)
It is divided into two branch roads starting separator (11) place, be connected respectively to subsequent processing and water tank (12), simultaneously to water pump group (6)
Setting bypass is used for connecting high-pressure heater (7).
2. a kind of forward type smoke heat exchanger system according to claim 1 it is characterised in that: preposition heat exchanger (3) work
Matter porch is provided with regulating valve (8), is provided with electronic shut-off valve (9) at sender property outlet.
3. a kind of forward type smoke heat exchanger system according to claim 1 and 2 it is characterised in that: preposition heat exchanger (3)
Bypass on 4 high-pressure heaters (7) are set, each high-pressure heater (7) is additionally provided with exhaust line (14), high-pressure heater
(7) loop is set up by gas exhaust piping (14), be connected to deaerator and water tank (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620988506.2U CN205919308U (en) | 2016-08-27 | 2016-08-27 | Forward type gas gas heater system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620988506.2U CN205919308U (en) | 2016-08-27 | 2016-08-27 | Forward type gas gas heater system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205919308U true CN205919308U (en) | 2017-02-01 |
Family
ID=57869061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620988506.2U Active CN205919308U (en) | 2016-08-27 | 2016-08-27 | Forward type gas gas heater system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205919308U (en) |
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2016
- 2016-08-27 CN CN201620988506.2U patent/CN205919308U/en active Active
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| GR01 | Patent grant |