CN205388305U - Novel low temperature second grade economizer - Google Patents
Novel low temperature second grade economizer Download PDFInfo
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- CN205388305U CN205388305U CN201620125705.0U CN201620125705U CN205388305U CN 205388305 U CN205388305 U CN 205388305U CN 201620125705 U CN201620125705 U CN 201620125705U CN 205388305 U CN205388305 U CN 205388305U
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Abstract
The utility model relates to a novel low temperature second grade economizer, including low temperature second grade economizer import header (1), low temperature second grade economizer outlet header (2), low temperature second grade economizer higher level's economizer (3), low temperature second grade economizer subordinate economizer (4), coiled pipe (5) and gallows (6), low temperature second grade economizer outlet header (2) sets up in low temperature second grade economizer import header (1) top, low temperature second grade economizer import header (1) links to each other with low temperature second grade economizer subordinate economizer (4), low temperature second grade economizer outlet header (2) links to each other with low temperature second grade economizer higher level's economizer (3), low temperature second grade economizer higher level's economizer (3), be connected with in low temperature second grade economizer subordinate economizer (4) coiled pipe (5), suspend in midair on gallows (6) coiled pipe (5), the utility model discloses an exhaust gas temperature of reduction boiler increases the generated energy, reduces the coal consumption, saves the purpose that desulfurization water consumes, protects the chimney.
Description
[technical field]
This utility model relates to boiler preheating recovery technology field, specifically a kind of two grades of economizers of new type low temperature.
[background technology]
The exhaust gas temperature of the many station boilers of China is higher than design load, about high 20-30 DEG C than design load.So, reduce exhaust gas temperature, for saving fuel, reducing pollution, there is very important practical significance.At present, the exhaust gas temperature of domestic station boiler mostly between 120 DEG C-140 DEG C, have even up to more than 160 DEG C.Therefore, the amplitude that the exhaust gas temperature of China can reduce is very big, and the quantity of the standard coal consumption that can reduce accordingly is also considerable.
[utility model content]
The purpose of this utility model seeks to solve above-mentioned deficiency and provides one two grades of economizers of new type low temperature, it is achieved that the exhaust gas temperature of reduction boiler, increases generated energy, reduces coal consumption, saves the purpose that desulfurization water consumes, protects chimney.
A kind of two grades of economizers of new type low temperature of design for achieving the above object, including two grades of economizer inlet headers 1 of low temperature, two grades of economizer exit headers 2 of low temperature, two grades of economizer higher level's economizers 3 of low temperature, two grades of economizer subordinate economizers 4 of low temperature, coil 5 and suspension bracket 6, two grades of economizer exit headers 2 of described low temperature are arranged on above two grades of economizer inlet headers 1 of low temperature, two grades of economizer subordinate economizers 4 of two grades of economizer inlet headers 1 of described low temperature and low temperature are connected, two grades of economizer higher level's economizers 3 of two grades of economizer exit headers 2 of described low temperature and low temperature are connected, two grades of economizer higher level's economizers 3 of described low temperature, two grades of economizer subordinate economizers 4 of low temperature are connected to coil 5, described coil 5 is suspended on suspension bracket 6.
The extremely lower and upper flowing of water in described coil 5, transversal flow coil 5 tube wall from top to down of the flue gas outside described coil 5.
Described coil 5 coil is of a size of ф 25mm.
Described suspension bracket 6 adopts 304 stainless steel materials to make.
Described coil 5 adopts H type extended surface tube as heat exchange element.
This utility model compared with the existing technology, has the advantage that
(1) reliability.First the selected of all design parameters consider that unit operation is reliable；
(2) economy.Under reliable premise, increase heat transfer temperature difference as far as possible, reduce the volume and weight of heat-transfer surface, reduce equipment investment.On the basis of technology and economy comparison, the decreasing value of appropriate design cigarette temperature is for being not less than 20 DEG C.If excessively reducing flue-gas temperature, except the abundant quantitative limitation of fan pressure head, the amount of energy saving of unit cigarette temperature drop will fall rapidly upon, and the investment payback time also will be greatly prolonged；
(3) reasonably optimizing.Strive for that the energy level reclaiming heat is the highest.Rationally being coupled with turbine system by steam generator system, reasonably optimizing low-level (stack-gas) economizer is fetched water, the position of backwater point reaches；
(4) safety.Conservative control heating surface tube wall temperature, avoids flue gas dew point.This is to ensure that the precondition that heating surface does not leak, and first all schemes must meet this condition.Adopting H type as heat exchange original paper, heat transfer efficiency is high, and compact conformation, the features such as dust stratification is few, abrasionproof performance rigidity good, overall is strong, smoke discharging residual heat recovering effect is good.Leave maintenance between high temperature section and low-temperature zone and safeguard gap (general 500～600mm), providing facility for maintenance.Sulfuric acid corrosion resistant steel making is adopted, it is ensured that complete machine service life >=10 year with smoke contacts parts low-temperature zone.Gas approach adopts deflector and abrasionproof tubular construction, enters cigarette uniform, effectively reduces abrasion；
To sum up, two grade low-temp economizers described in the utility model achieve the exhaust gas temperature reducing boiler, increase the purpose of generated energy, reduction coal consumption, saving desulfurization water consumption, protection chimney.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model；
In figure: 1, two grades of economizer inlet headers 2 of low temperature, two grades of economizer exit headers 3 of low temperature, two grades of economizer higher level's economizers 4 of low temperature, low temperature two grades of economizer subordinate economizers 5, coil 6, suspension brackets.
[detailed description of the invention]
This utility model is made further explained below below in conjunction with accompanying drawing:
As shown in Figure 1, this utility model includes: two grades of economizer inlet headers 1 of low temperature, two grades of economizer exit headers 2 of low temperature, two grades of economizer higher level's economizers 3 of low temperature, two grades of economizer subordinate economizers 4 of low temperature, coil 5 and suspension bracket 6, two grades of economizer exit headers 2 of low temperature are arranged on above two grades of economizer inlet headers 1 of low temperature, two grades of economizer subordinate economizers 4 of two grades of economizer inlet headers 1 of low temperature and low temperature are connected, two grades of economizer higher level's economizers 3 of two grades of economizer exit headers 2 of low temperature and low temperature are connected, two grades of economizer higher level's economizers 3 of low temperature, two grades of economizer subordinate economizers 4 of low temperature are connected to coil 5, coil 5 is suspended on suspension bracket 6, suspension bracket 6 adopts 304 stainless steel materials to make；Water in coil 5 is to lower and upper flowing, and the flue gas outside coil 5 is transversal flow coil 5 tube wall from top to down, and coil 5 coil is of a size of ф 25mm, and coil 5 adopts H type extended surface tube as heat exchange element.
Two grades of economizers of low temperature described in the utility model, specifically include that two grades of economizer inlet headers of low temperature, are arranged on below low-level (stack-gas) economizer, are connected with two grades of economizer subordinate economizers of low temperature；Two grades of economizer exit headers of low temperature, are arranged on the top of low-level (stack-gas) economizer, are connected with two grades of economizer higher level's economizers of low temperature；Two grades of economizer higher level's economizers of low temperature, arrange and are connected with outlet header；Two grades of economizer subordinate economizers of low temperature, arrange and are connected with inlet header；Coil, is set to the component of the superior and the subordinate's economizer；Suspension bracket, is set to the suspending rod of the superior and the subordinate's economizer, is used for suspending the superior and the subordinate's economizer in midair, and material is 304 rustless steels.The superior and the subordinate's economizer of these two grades of economizers of low temperature, increase than the quantity of the coil of one-level economizer, heat-transfer surface increases, coil extremely lower and upper flowing, flue gas is transversal flow tube wall flue gas and the expansion of heat exchanger tube contact area from top to down outside, to realize the large area heat exchange between flue gas and feedwater.
The purpose of this utility model is to provide for a kind of under general exhaust gas temperature, and boiler exhaust gas is also the waste heat source that a potentiality is very big, it is possible to use much new technology and equipment reduces the exhaust gas temperature of boiler.Flue gas loss is a most important heat loss in boiler operatiopn, is typically about about 8%, accounts for about the 65% of boiler heat loss.The principal element affecting heat loss due to exhaust gas is exhaust gas temperature, and generally, exhaust gas temperature often increases by 10 DEG C, and heat loss due to exhaust gas increases 0.6%-1.0%, corresponding many consumption coal 1.2-2.4g/kwh.Reduction exhaust gas temperature has important practical significance for energy-saving and emission-reduction and installs low-level (stack-gas) economizer additional at boiler back end ductwork, it is possible to reaches degree of depth Mist heat recovering, increase generated energy, reduce coal consumption, save the purpose that desulfurization water consumes, protects chimney.
This utility model is not by the restriction of above-mentioned embodiment; other any without departing from the change made under spirit of the present utility model and principle, modification, replacement, combination, simplification; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (5)
- null1. two grades of economizers of a new type low temperature，It is characterized in that: include two grades of economizer inlet headers (1) of low temperature、Two grades of economizer exit headers (2) of low temperature、Two grades of economizers higher level's economizer (3) of low temperature、Two grades of economizer subordinates economizer (4) of low temperature、Coil (5) and suspension bracket (6)，Two grades of economizer exit headers (2) of described low temperature are arranged on two grades of economizer inlet header (1) tops of low temperature，Two grades of economizer subordinates economizer (4) of two grades of economizer inlet headers (1) of described low temperature and low temperature are connected，Two grades of economizers higher level's economizer (3) of two grades of economizer exit headers (2) of described low temperature and low temperature are connected，Two grades of economizers higher level's economizer (3) of described low temperature、Two grades of economizer subordinates economizer (4) of low temperature are connected to coil (5)，Described coil (5) is suspended on suspension bracket (6).
- 2. two grades of economizers of new type low temperature as claimed in claim 1, it is characterised in that: the extremely lower and upper flowing of the water in described coil (5), described coil (5) flue gas outward transversal flow coil (5) tube wall from top to down.
- 3. two grades of economizers of new type low temperature as claimed in claim 1 or 2, it is characterised in that: described coil (5) coil is of a size of ф 25mm.
- 4. two grades of economizers of new type low temperature as claimed in claim 3, it is characterised in that: described suspension bracket (6) adopts 304 stainless steel materials to make.
- 5. two grades of economizers of new type low temperature as claimed in claim 4, it is characterised in that: described coil (5) adopts H type extended surface tube as heat exchange element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620125705.0U CN205388305U (en) | 2016-02-18 | 2016-02-18 | Novel low temperature second grade economizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620125705.0U CN205388305U (en) | 2016-02-18 | 2016-02-18 | Novel low temperature second grade economizer |
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| CN205388305U true CN205388305U (en) | 2016-07-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106959026A (en) * | 2017-05-18 | 2017-07-18 | 华北理工大学 | A kind of laterally intermittent stagnation coiled pipe membrane wall powder high-efficiency heat exchanger |
-
2016
- 2016-02-18 CN CN201620125705.0U patent/CN205388305U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106959026A (en) * | 2017-05-18 | 2017-07-18 | 华北理工大学 | A kind of laterally intermittent stagnation coiled pipe membrane wall powder high-efficiency heat exchanger |
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