CN203810434U - Novel flue gas heater with demisting function - Google Patents
Novel flue gas heater with demisting function Download PDFInfo
- Publication number
- 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
- Authority
- CN
- China
- Prior art keywords
- flue gas
- gas heater
- rows
- tubes
- round
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000003546 flue gas Substances 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005260 corrosion Methods 0.000 claims abstract description 13
- 230000007797 corrosion Effects 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000007664 blowing Methods 0.000 claims description 7
- 239000004071 soot Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 5
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000004571 lime Substances 0.000 abstract description 5
- 239000002253 acid Substances 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 230000003009 desulfurizing effect Effects 0.000 description 5
- 238000010257 thawing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
一种具有除雾功能的新型烟气加热器，包括外壳，在外壳直段前端设置有四排腰圆管，第一排和第四排腰圆管竖直布置，并分别与进水集箱和出水集箱连通，第二排和第三排腰圆管呈八字形布置，四排腰圆管通过腰圆管连接弯头连接，构成蛇形管，腰圆管均采用窄间隙布置；在外壳直段后端设置有水平布置的多排鳍片管，鳍片管与设置在外壳两端的集箱连通，四排腰圆管和多排鳍片管构成的换热管束将烟气加热器分为湿烟气区和干烟气区；本实用新型不仅能对烟气进行加热而且还可以进一步降低烟气中液滴的含量，将除雾和加热结合起来，提高烟气温度，从而提高烟气升力，减小污染物分散浓度，避免石灰雨；降低烟气湿度，减轻酸性液滴对烟道和烟囱的腐蚀。
A new type of flue gas heater with defogging function, including a shell, four rows of round tubes are arranged at the front end of the straight section of the shell, the first row and the fourth row of round tubes are vertically arranged, and are respectively connected to the water inlet header Connected with the water outlet header, the second row and the third row of round tubes are arranged in a figure-eight shape, and the four rows of round tubes are connected by elbows connecting the round tubes to form a serpentine tube, and the round tubes are arranged with narrow gaps; The rear end of the straight section of the shell is provided with multiple rows of finned tubes arranged horizontally. The finned tubes are connected to the headers at both ends of the shell. Divided into a wet flue gas area and a dry flue gas area; the utility model can not only heat the flue gas but also further reduce the content of liquid droplets in the flue gas, combine defogging and heating to increase the temperature of the flue gas, thereby improving Flue gas lift, reduce the dispersed concentration of pollutants, and avoid lime rain; reduce the humidity of flue gas, and reduce the corrosion of acid droplets on flue and chimney.
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)
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 Expired - Lifetime 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 Expired - Lifetime
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 |