CN203810434U - Novel flue gas heater with demisting function - Google Patents
Novel flue gas heater with demisting function Download PDFInfo
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- CN203810434U CN203810434U CN201420198583.9U CN201420198583U CN203810434U CN 203810434 U CN203810434 U CN 203810434U CN 201420198583 U CN201420198583 U CN 201420198583U CN 203810434 U CN203810434 U CN 203810434U
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- flue gas
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Abstract
A novel flue gas heater with a demisting function comprises an outer shell. Four rows of kidney-shaped circular tubes are arranged at the front end of the straight section of the outer shell, the first row of kidney-shaped circular tubes and the fourth row of kidney-shaped circular tubes are vertically arranged and are communicated with a water inlet header and a water outlet header respectively. The second row of kidney-shaped circular tubes and the third row of kidney-shaped circular tubes are arrayed in a V shape, the four rows of kidney-shaped circular tubes are connected through kidney-shaped circular tube connecting bends to constitute a coil pipe, and the kidney-shaped circular tubes are all arranged in a narrow gap mode. Multiple rows of finned tubes which are horizontally arranged are arranged at the rear end of the straight section of the outer shell, the finned tubes are communicated with the headers at the two ends of the outer shell, and a heat exchange tube formed by the four rows of kidney-shaped circular tubes and the multiple rows of finned tubes divides the flue gas heater into a wet flue gas area and a dry flue gas area. The novel flue gas heater can be used for heating flue gas and also can further low the content of liquid drops in the flue gas, demisting and heating are combined, the flue gas temperature is improved, so that the flue gas lifting force is improved, the dispersion concentration of pollutes is reduced, and lime rain is avoided. The flue gas humidity is lowered, and corrosion to a flue and a chimney of acid liquid drops is lightened.
Description
Technical field
The utility model belongs to flue gas heater field in boiler flue gas desulfurization system, is specifically related to a kind of Novel flue gas heater with defrosting function.
Background technology
Boiler flue gas desulfurization has become inevitable requirement at present.In wet desulphurization, through the flue gas of desulfurization processing, temperature is all lower.When the too low flue gas of temperature is discharged from chimney, the buoyancy (or claiming buoyance lift height) of flue gas is declined, the also corresponding decline of muzzle velocity of flue gas simultaneously, effective stack height reduces, by the remaining SO that causes discharging from chimney
x, NO
xcan not spread fully with dust material, this is that environmental protection institute is unallowed; And flue-gas temperature is too low, the moisture in flue gas can condense, and forms lime rain, pollutes surrounding environment, and the liquid getting off that condenses contains acid ingredient, and flue and chimney are produced to corrosion.The some countries even exhaust gas temperature of regulation chimney should be greater than certain value.Desulfurization flue gas after treatment generally will heat again for this reason, is beneficial to the diffusion of flue gas, slowing down corrosion.
And because the flue-gas temperature after wet desulphurization is lower than water dew point, the moisture in flue gas can condense into drop, in desulfurizing tower running, lime slurry also easily forms drop simultaneously.In these drops, not only contain moisture, and be dissolved with the corrosivity compositions such as sulfuric acid, sulfate and sulfur dioxide, these drops can cause and stain and heavy corrosion flue and chimney below, so demister is generally installed in desulfurizing tower, are used for reducing the content of drop in flue gas after desulfurization.But because demister efficiency is not high, in desulfurizing tower, flue gas out, still contain many drops, therefore further reduce in flue gas the content of drop necessary.According to document, some desulphurization systems install the demister of one-level horizontal type additional after common flue gas heat-exchange unit again, but this can increase system complexity, take up room and cost.
Summary of the invention
In order to address the above problem, the purpose of this utility model is to provide a kind of Novel flue gas heater with defrosting function, not only can heat flue gas but also can further reduce the content of drop in flue gas, demist and heating are combined, improve flue-gas temperature, thereby improve flue gas lift, reduce pollutant and disperse concentration, avoid lime rain; Reduce smoke moisture, alleviate the corrosion of acid drop to flue and chimney.
To achieve these goals, the utility model adopts following technical scheme:
A kind of Novel flue gas heater with defrosting function, comprise shell 1, be provided with four row's oval pipes 2 at shell 1 straight section front end, first row and the 4th row's oval pipe 2 are vertically arranged, and be communicated with water inlet header 4 and water outlet header 12 respectively, second row and the 3rd row's oval pipe 2 are splayed to be arranged, described four row's oval pipes 2 connect by oval pipe connecting bend 3, form coiled pipe, described oval pipe 2 all adopts narrow gap to arrange; Be provided with horizontally disposed many rows extended surface tube 5 in shell 1 straight section rear end, described extended surface tube 5 is communicated with the header 6 that is arranged on shell 1 two ends, and flue gas heater is divided into wet flue gas district and dry flue gas district by the heat-exchanging tube bundle that described four row's oval pipes 2 and many row's extended surface tubes 5 form.
The housing 1 and horizontal direction slight inclination preset angles of described four row oval pipe 2 bottoms, and have multiple apertures.
Described preset angles is 5 °～10 °.
The housing of described four row oval pipe 2 bottoms is also provided with collecting tank 71 time, and described collecting tank 7 bottoms are skewed, and have circular hole at inclined low-end, and circular hole connects drain pipe 8, and drain valve 9 is installed on drain pipe 8.
Between described four row's oval pipes 2 and many row's extended surface tubes 5, be provided with steam soot-blower 10, when flue gas heater operation, steam soot-blower 10 purges steam to both sides, reaches and blows grey object; When blowing out, spray water to oval pipe 2, it is cleaned.
Described header 6 adopts header connecting bend 13 to connect.
Described oval pipe 2 adopts corrosion resistant stainless steel material.
Described extended surface tube 5 adopts the finned tube taking pipe as base tube.
Described finned tube is H type finned tube, spiral fin coil or needle type fin pipe.
In described four row's oval pipes 2, all can either lead to hot water and can lead to again steam.
The feature of the utility model maximum is to adopt oval pipe 2 thin spaces to arrange, and the 2nd row and the 3rd row's oval pipe 2 adopt splayed configuration arrangement.Have the following advantages:
One, oval pipe 2 thin space splayeds are arranged, thin space is arranged can strengthen laminar heat transfer, and oval pipe 2 enhanced heat exchange faces are far longer than pipe; Splayed is arranged and is formed fold-line-shaped passage, the drop in flue gas is had to the effect of centrifugal force.Due to this two aspect, the gasification of being heated of the drop part in flue gas, a part gathers tube surface, discharges heater subsequently by bottom, thereby has realized the function of demist.The utility model combines demist and two kinds of functions of heating, improves flue-gas temperature, thereby improves flue gas lift, reduces pollutant and disperses concentration, avoids lime rain; Reduce smoke moisture, alleviate the corrosion of acid drop to flue and chimney.
Two, oval pipe 2 and extended surface tube 5 adopt straight tube, are convenient to processing and install, and are also convenient to maintenance when damaged tubular.
Three, be provided with steam soot-blower 10, regularly blow down the dust stratification being gathered on oval pipe 2 and extended surface tube 5, and in blowing out, oval pipe 2 is sprayed water, clean, slow down and stop up and corrosion.
Four, in four row's oval pipes 2, not only can lead to hot water but also can lead to steam, can freely select.When logical steam, the efficiency of heating surface is high, and cold end corrosion is light; When logical hot water, save the energy, can meet and add heat request again.
Five, the coiled pipe being made up of elbow 3 and oval pipe 2 adopts following current to arrange, in first row oval pipe 2, the temperature of heating working medium hot water or steam is higher than counter-flow arrangement, the cold end corrosion that alleviates cold junction.
Brief description of the drawings
Fig. 1 is the schematic perspective view of the utility model heater.
Fig. 2 is the front view of the utility model heater.
Fig. 3 is that Fig. 2 is along B-B to generalized section.
Fig. 4 is the top view of the utility model heater.
Fig. 5 is that Fig. 4 is along A-A to generalized section.
Fig. 6 is the structural representation of oval pipe 2.
Fig. 7 is the contrast schematic diagram of oval pipe 2 and pipe.
Fig. 8 is that oval pipe 2 splayeds are arranged flow of flue gas direction schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, structural principle of the present utility model and operation principle are elaborated.
When the utility model uses, flue gas heater inlet flue duct connects and is connected with desulfurizing tower exhaust pass, and flue gas heater exhaust pass connects and is connected with chimney inlet flue duct.
As shown in Figures 1 to 5, a kind of Novel flue gas heater with defrosting function of the utility model, comprise shell 1, be provided with four row's oval pipes 2 at shell 1 straight section front end, first row and the 4th row's oval pipe 2 are vertically arranged, and are communicated with water inlet header 4 and water outlet header 12 respectively, second row and the 3rd row's oval pipe 2 are splayed and arrange, described four row's oval pipes 2 connect by oval pipe connecting bend 3, form coiled pipe, and described oval pipe 2 all adopts narrow gap to arrange; Be provided with horizontally disposed many rows extended surface tube 5 in shell 1 straight section rear end, described extended surface tube 5 is communicated with the header 6 that is arranged on shell 1 two ends, and described header 6 adopts header connecting bend 13 to connect; Flue gas heater is divided into wet flue gas district and dry flue gas district by the heat-exchanging tube bundle that described four row's oval pipes 2 and many row's extended surface tubes 5 form.
As preferred embodiment of the present utility model, the housing 1 and horizontal direction slight inclination preset angles of described four row oval pipe 2 bottoms, and have multiple apertures.Further, described preset angles is 5 °～10 °.
As shown in Figure 2, as preferred embodiment of the present utility model, the housing of described four row oval pipe 2 bottoms is also provided with collecting tank 71 time, described collecting tank 7 bottoms are skewed, and having circular hole at inclined low-end, circular hole connects drain pipe 8, and drain valve 9 is installed on drain pipe 8.
As shown in Figure 3, as preferred embodiment of the present utility model, between described four row's oval pipes 2 and many row's extended surface tubes 5, be provided with steam soot-blower 10, when flue gas heater operation, steam soot-blower 10 purges steam to both sides, reaches and blows grey object; When blowing out, spray water to oval pipe 2, it is cleaned.
As preferred embodiment of the present utility model, described oval pipe 2 adopts corrosion resistant stainless steel material.
As preferred embodiment of the present utility model, described extended surface tube 5 adopts the finned tube taking pipe as base tube.Further, described finned tube is H type finned tube, spiral fin coil or needle type fin pipe.
Operation principle of the present utility model is: shell 1 of the present utility model, form flue gas main channel, desulfurizing tower flue gas out enters flue gas heater from left side, during through first row oval pipe 2, has produced elementary gas-liquid separation, part liquid is because of the gasification of being heated, a part gathers oval pipe 2 surfaces, why arranges with oval pipe 2 thin spaces, and be because thin space is arranged the effect with strengthening laminar heat transfer, and oval pipe 2 enhanced heat exchange faces increase greatly compared with pipe, as shown in Figure 7.In the time that flue gas is arranged oval pipe 2 through the 2nd row and the 3rd, produce second level gas-liquid separation.As shown in Figure 8, two row's oval pipes 2 are splayed to be arranged and forms fold-line-shaped passage, and due to the effect of inertia and centrifugal force, the drop in flue gas clashes into and is adsorbed onto oval pipe 2 surfaces.Flue gas carries out current-sharing through the 4th row's oval pipe 2, then enters the dry flue gas district that extended surface tube 5 forms and further heats, and finally discharges heater.Gather drop on oval pipe 2 because the effect meeting of gravity flows downward along pipe, drop onto on the inclined plane 11 of housing 1 bottom, by aperture, discharge heater finally by crossing collecting tank 7, drain pipe 8 and drain valve 9.In the process of boiler operatiopn, the steam soot-blower 10 in the middle of being arranged in regularly purges steam to both sides, blows down the cigarette ash that is gathered in tube surface; When blowing out, soot blower 10 is sprayed water to oval pipe 2, and it is cleaned.
Four row's oval pipe 2 interior hot water that all both can lead to also can lead to steam, the interior all logical hot water of extended surface tube 5, and oval pipe 2 is arranged with the coiled pipe following current that elbow 3 forms, is conducive to alleviate cold end corrosion.
Claims (10)
1. one kind has the Novel flue gas heater of defrosting function, comprise shell (1), it is characterized in that: be provided with four row's oval pipes (2) at shell (1) straight section front end, first row and the 4th row's oval pipe (2) are vertically arranged, and be communicated with water inlet header (4) and water outlet header (12) respectively, second row and the 3rd row's oval pipe (2) are splayed and arrange, described four row's oval pipes (2) connect by oval pipe connecting bend (3), form coiled pipe, described oval pipe (2) all adopts narrow gap to arrange; Be provided with horizontally disposed many rows extended surface tube (5) in shell (1) straight section rear end, described extended surface tube (5) is communicated with the header (6) that is arranged on shell (1) two ends, and flue gas heater is divided into wet flue gas district and dry flue gas district by the heat-exchanging tube bundle that described four row's oval pipes (2) and many row's extended surface tubes (5) form.
2. a kind of Novel flue gas heater with defrosting function according to claim 1, is characterized in that: the housing (1) and horizontal direction slight inclination preset angles of described four row oval pipe (2) bottoms, and have multiple apertures.
3. a kind of Novel flue gas heater with defrosting function according to claim 2, is characterized in that: described preset angles is 5 °～10 °.
4. a kind of Novel flue gas heater with defrosting function according to claim 1, it is characterized in that: under the housing (1) of described four row oval pipe (2) bottoms, be also provided with collecting tank (7), described collecting tank (7) bottom is skewed, and have circular hole at inclined low-end, circular hole connects drain pipe (8), and drain valve (9) is installed on drain pipe (8).
5. a kind of Novel flue gas heater with defrosting function according to claim 1, it is characterized in that: between described four row's oval pipes (2) and many row's extended surface tubes (5), be provided with steam soot-blower (10), when flue gas heater operation, steam soot-blower (10) purges steam to both sides, reaches and blows grey object; When blowing out, to oval pipe (2) water spray, it is cleaned.
6. a kind of Novel flue gas heater with defrosting function according to claim 1, is characterized in that: described header (6) adopts header connecting bend (13) to connect.
7. a kind of Novel flue gas heater with defrosting function according to claim 1, is characterized in that: described oval pipe (2) adopts corrosion resistant stainless steel material.
8. a kind of Novel flue gas heater with defrosting function according to claim 1, is characterized in that: described extended surface tube (5) adopts the finned tube taking pipe as base tube.
9. a kind of Novel flue gas heater with defrosting function according to claim 8, is characterized in that: described finned tube is H type finned tube, spiral fin coil or needle type fin pipe.
10. a kind of Novel flue gas heater with defrosting function according to claim 1, is characterized in that: in described four row's oval pipes (2), all can either lead to hot water and can lead to again steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420198583.9U CN203810434U (en) | 2014-04-22 | 2014-04-22 | Novel flue gas heater with demisting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420198583.9U CN203810434U (en) | 2014-04-22 | 2014-04-22 | Novel flue gas heater with demisting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203810434U true CN203810434U (en) | 2014-09-03 |
Family
ID=51449177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420198583.9U Withdrawn - After Issue CN203810434U (en) | 2014-04-22 | 2014-04-22 | Novel flue gas heater with demisting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203810434U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968405A (en) * | 2014-04-22 | 2014-08-06 | 西安交通大学 | Smoke heater with defogging function |
| CN104930533A (en) * | 2015-06-29 | 2015-09-23 | 上海宝钢节能环保技术有限公司 | Flue gas reheating apparatus for sintering flue gas denitration |
| CN105605599A (en) * | 2016-02-29 | 2016-05-25 | 西安西热锅炉环保工程有限公司 | Exhaust gas heater with mist and dust removing function |
-
2014
- 2014-04-22 CN CN201420198583.9U patent/CN203810434U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968405A (en) * | 2014-04-22 | 2014-08-06 | 西安交通大学 | Smoke heater with defogging function |
| CN103968405B (en) * | 2014-04-22 | 2016-02-24 | 西安交通大学 | A kind of flue gas heater with defrosting function |
| CN104930533A (en) * | 2015-06-29 | 2015-09-23 | 上海宝钢节能环保技术有限公司 | Flue gas reheating apparatus for sintering flue gas denitration |
| CN105605599A (en) * | 2016-02-29 | 2016-05-25 | 西安西热锅炉环保工程有限公司 | Exhaust gas heater with mist and dust removing function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140903 Effective date of abandoning: 20160224 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |