CN202070278U - Heating system for purified flue gas after being subjected to wet flue gas desulfurization - Google Patents
Heating system for purified flue gas after being subjected to wet flue gas desulfurization Download PDFInfo
- Publication number
- CN202070278U CN202070278U CN2010206838791U CN201020683879U CN202070278U CN 202070278 U CN202070278 U CN 202070278U CN 2010206838791 U CN2010206838791 U CN 2010206838791U CN 201020683879 U CN201020683879 U CN 201020683879U CN 202070278 U CN202070278 U CN 202070278U
- Authority
- CN
- China
- Prior art keywords
- gas
- flue gas
- heat exchanger
- desulfurization
- flue
- 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
Images
Abstract
The utility model discloses a heating system for a purified flue gas after being subjected to wet flue gas desulfurization. The heating system comprises an absorption tower (1), a gas-to-gas heat exchanger (2), a double-shutter type baffle door (3), a baffle sealing system (4), a chimney (5), and the like. Nearby an original flue gas inlet and a purified flue gas outlet of the gas-to-gas heat exchanger (2), a section of flue is additionally arranged and the double-shutter type baffle door (3) with a flow regulating function and the corresponding baffle sealing system (4) are also arranged. The opening degree of the double-shutter type baffle door (3) is automatically adjusted according to the demands on flue gas discharging temperature and desulfurization efficiency of the chimney, so as to adjust the flow of the original flue gas mixed with low-temperature purified flue gas and heat the purified flue gas. A method for increasing flue gas temperature by introducing a part of the original flue gas into the purified flue gas is adopted in the heating system, thereby simplifying the gas-to-gas heat exchanger, reducing the investment in the gas-to-gas heat exchanger, partially solving the problems, such as inferior heating effect, unstable desulfurization performance, and the like, caused by the fouling and blocking of the gas-to-gas heat exchanger, and wholly improving the performance of a desulfurization system and promoting the desulfurization economical efficiency.
Description
Technical field
The utility model relates to the field of engineering technology that flue gas desulfurization need be carried out in thermal power plant etc., relates in particular to a kind of clean flue gas heating system of wet process of FGD.
Background technology
The pollution situation of current China is very severe, and sulfur dioxide is the major pollutants of China's atmosphere pollution.Flue gas desulfurization is the important channel of control sulfur dioxide (SO2) emissions, also is most economical, effective means.Since two thousand, China's flue gas desulfurization industry is through fast-developing, existing large quantities of desulphurization plant installation and operations, what these desulphurization plant overwhelming majority were used is the wet desulphurization technology, this technology is that technology is the most ripe in the world at present, and practical achievement is maximum, the sulfur removal technology that operation conditions is the most stable, be the first-selected main flow technology in various countries and area, so also extensive in the application of China.
Wet method fume desulfurizing system can be divided into the system that gas-to-gas heat exchanger and no gas-to-gas heat exchanger are arranged, the main purpose of gas-to-gas heat exchanger be to improve pollutant in the flue gas diffusion, add low-temperature flue gas behind the thermally desulfurizing with weaken flue gas in chimney coagulability and improve the lifting emission effect etc. of flue gas.And from operational effect, many devices all exist owing to the heating weak effect that gas-to-gas heat exchanger fouling, obstruction cause, desulfurization performance instability, move problems such as uneconomical.Many power plant are subjected to the puzzlement of gas-to-gas heat exchanger fouling blockage problem for a long time, make desulfuration efficiency not up to standard, even desulfurizer is forced to stop transport, and are having a strong impact on the ordinary production of enterprise, and environment is also caused bigger pollution.
Gas-to-gas heat exchanger heat exchange original paper itself is easily stifled resistance element, under the prerequisite that appearance and size is determined, heat exchange effect and its resistance are a pair of intrinsic contradiction, in order to guarantee enough thermal effects that adds, the heat exchange original paper must have enough height and as far as possible little circulation gap, thereby the increase heat exchange area, but the increase of resistance that reduces directly to cause gas-to-gas heat exchanger of the increase of heat exchange element height and through-flow gap causes the generation of easy fouling and stopping state.Cancellation gas-to-gas heat exchanger and do not have power plant under the situation of effective heater means and must consider low-temperature flue gas carefully the burn into low-temperature flue gas of chimney is discharged the discharging diffusion behind the chimney and the preservative treatment of chimney, otherwise will bring new problem to power plant.Do not needing to be provided with in the desulfurizing item of gas-to-gas heat exchanger, we can seek multiple brand-new flue gas mode of heating, but in the project that gas-to-gas heat exchanger must exist, we can only be from gas-to-gas heat exchanger itself, system is improved, the influence of gas-to-gas heat exchanger to whole desulphurization system is reduced to little.
The utility model is at the shortcoming that the wet method fume desulfurizing system of current band gas-to-gas heat exchanger exists, and provides a kind of and can alleviate the gas-to-gas heat exchanger fouling, stopped up the clean flue gas heating system of wet process of FGD of problems such as the heating weak effect, desulfurization performance instability, the operation that cause be uneconomical.
Summary of the invention
Technical problem to be solved in the utility model is, be provided with at flue gas desulphurization system under the prerequisite of gas-to-gas heat exchanger, and in system desulfuration efficiency being required is not under the too high prerequisite, a kind of UTILIZATION OF VESIDUAL HEAT IN efficient, investment of saving gas-to-gas heat exchanger that can improve the former flue gas of high temperature is provided, improves the high-efficiency flue gas desulfurization system of flue gas desulphurization system overall performance.
To achieve these goals, the technical solution adopted in the utility model is: in the wet method fume desulfurizing system of current common band gas-to-gas heat exchanger, the simple gas-to-gas heat exchanger device of one cover is set, enter the former flue-gas temperature on absorption tower in order to reduction, and, realize that heat up the first time of clean flue gas with the clean flue gas of low temperature that the waste heat heating is come out from the absorption tower.Simultaneously in the clean flue gas flue of the former flue gas flue of gas-to-gas heat exchanger inlet and outlet, set up one section flue, and the two multiple damper doors with flow regulating function are set therein, according to the requirement of system to desulfuration efficiency and chimney smoke temperature, realize the automatic adjusting of baffle door aperture, the former flue gas of high temperature that part is come out from boiler induced-draft fan enters into clean flue, fully mix, thereby heat up the second time of realizing clean flue gas, finally reaches the flue-gas temperature that can satisfy emission request.
The clean flue gas heating system of Gou Zao novel flue gas desulfurization is compared with the gas-to-gas heat exchanger flue gas reheat system of routine in the prior art and is had following characteristics as mentioned above:
The utility model is replaced by the heat exchange element that cost is lower, exchange capability of heat is smaller with original gas-to-gas heat exchanger heat exchange element, simultaneously in the clean flue gas flue of the former flue gas flue of gas-to-gas heat exchanger inlet and outlet, set up one section flue, and the two multiple damper doors with flow regulating function are set in the flue of setting up.This scheme can effectively be alleviated because of problems such as the heat exchange weak effect that gas-to-gas heat exchanger fouling and obstruction cause, desulfurization performance instabilities, made full use of the high-temperature residual heat of former flue gas, reduce the investment of desulphurization system power consumption and gas-to-gas heat exchanger, improved the desulphurization system economy.
The utility model also has controllability flexibly, can automatically the louver type baffle door be adjusted to suitable aperture according to the security and the desulfuration efficiency requirement of chimney, also is furnished with barrier seal systems simultaneously, can prevent smoke spillage, effectively improve the baffle plate sealing, guarantee desulphurization system safety.
Because some former flue gas of system of mentioning of the utility model is with after flue gas mixes only, directly by smoke stack emission in atmosphere, thereby it is not to be particularly suitable for the extra high area of desulfuration efficiency requirement.Yet we can be by improving the absorption tower performance, such as adopting the better absorption tower of desulfurization performance such as packed tower etc., improves the performance of a whole set of desulphurization system.
Description of drawings
Fig. 1 is the schematic block diagram of flue gas desulfurization residual neat recovering system of the present utility model.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment
As shown in Figure 1, the utility model is improvement and the innovation of being done on the wet method fume desulfurizing system of common band gas-to-gas heat exchanger.Common wet method fume desulfurizing system generally is made up of flue gas system, absorption tower system, absorbent preparation system, accessory substance treatment system, fresh water (FW) system etc.The flue gas that main chimney flue behind boiler induced-draft fan is drawn, by booster fan (if any words) boost and gas-to-gas heat exchanger (2) cooling after enter absorption tower (1), in absorption tower (1), carry out the desulfurizing and purifying process, flue gas after being purified enters process gas-to-gas heat exchanger (2) intensification and enters clean flue gas flue after demister is removed water smoke, after chimney (5) enters atmosphere.In the present embodiment, in the clean flue gas flue of the former flue gas flue of gas-to-gas heat exchanger inlet and outlet, set up one section flue, and two multiple damper doors (3) and a barrier seal systems (4) with flow regulating function is set in the flue of setting up, according to system to the requirement of desulfuration efficiency and be discharged into the aperture that clean flue-gas temperature in the chimney requires automatic controllable register door, make the former flue gas of part high temperature enter into clean flue, fully mix, thereby promote the flue-gas temperature that is discharged in the chimney.
Claims (1)
1. the clean flue gas heating system of a wet process of FGD, it comprises absorption tower (1), gas-to-gas heat exchanger (2), two multiple damper door (3), barrier seal systems (4), chimney (5); It is characterized in that, near the former smoke inlet of gas-to-gas heat exchanger (2) and clean exhanst gas outlet, set up one section flue, and two multiple damper doors (3) and the corresponding barrier seal systems (4) with flow regulating function is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206838791U CN202070278U (en) | 2010-12-28 | 2010-12-28 | Heating system for purified flue gas after being subjected to wet flue gas desulfurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206838791U CN202070278U (en) | 2010-12-28 | 2010-12-28 | Heating system for purified flue gas after being subjected to wet flue gas desulfurization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202070278U true CN202070278U (en) | 2011-12-14 |
Family
ID=45108394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206838791U Expired - Lifetime CN202070278U (en) | 2010-12-28 | 2010-12-28 | Heating system for purified flue gas after being subjected to wet flue gas desulfurization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202070278U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106039975A (en) * | 2016-07-16 | 2016-10-26 | 江苏民生重工有限公司 | Calcium-based wet desulfurization process |
| CN106582245A (en) * | 2016-12-23 | 2017-04-26 | 江苏诺伊拓环保工程有限公司 | Improved semi-dry process desulfurization tower |
| CN107101216A (en) * | 2017-04-20 | 2017-08-29 | 华电电力科学研究院 | One kind, which is returned, takes out the former neat stress back-heating type heat-exchange system of Anti-leakage type and its method of work |
| CN110285931A (en) * | 2019-07-08 | 2019-09-27 | 广州珠江电力有限公司 | A kind of detection method of heat-engine plant desulfurizer flue gas heat-exchange unit air leak rate of air curtain |
-
2010
- 2010-12-28 CN CN2010206838791U patent/CN202070278U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106039975A (en) * | 2016-07-16 | 2016-10-26 | 江苏民生重工有限公司 | Calcium-based wet desulfurization process |
| CN106039975B (en) * | 2016-07-16 | 2018-08-17 | 江苏民生重工有限公司 | A kind of calcium base wet-process sulfur removal technology |
| CN106582245A (en) * | 2016-12-23 | 2017-04-26 | 江苏诺伊拓环保工程有限公司 | Improved semi-dry process desulfurization tower |
| CN107101216A (en) * | 2017-04-20 | 2017-08-29 | 华电电力科学研究院 | One kind, which is returned, takes out the former neat stress back-heating type heat-exchange system of Anti-leakage type and its method of work |
| CN110285931A (en) * | 2019-07-08 | 2019-09-27 | 广州珠江电力有限公司 | A kind of detection method of heat-engine plant desulfurizer flue gas heat-exchange unit air leak rate of air curtain |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202070278U (en) | Heating system for purified flue gas after being subjected to wet flue gas desulfurization | |
| CN109404958B (en) | Energy-saving synergistic anti-blocking method and system based on bypass flue of air preheater | |
| CN204952670U (en) | Glass melting furnace flue gas dust removal SOx/NOx control concurrent processing system | |
| CN202915385U (en) | Mixed type smoke purifying and heating device | |
| CN211537261U (en) | Sintering flue gas dual-heating SCR denitration system | |
| CN107935084A (en) | A kind of the desulfurization wastewater Zero discharging system and method for the wide load denitration of cooperative achievement | |
| CN208786167U (en) | A kind of system of the wide load denitration of air water cooperative achievement | |
| CN202018186U (en) | System using boiler flue gas waste heat for drying brown coal | |
| CN206535421U (en) | A kind of waste incinerator two-part flue gas purification system | |
| CN110822461A (en) | Method for realizing wide-load denitration by bypass grading economizer | |
| CN110841481A (en) | Sintering flue gas double-heating SCR denitration method and system | |
| CN205424906U (en) | No recirculating fan driven layer furnace gas recirculation and regulation and control system thereof | |
| CN205746947U (en) | A kind of solar energy heating coal-burning boiler smoke evacuation system | |
| CN208042180U (en) | A kind of white plume elimination system based on flue gas recirculating technique | |
| CN209355296U (en) | A kind of energy efficiency anti-blocking system based on air preheater bypass flue | |
| CN212548952U (en) | Sintering machine head flue gas desulfurization and denitrification treatment device | |
| CN212430928U (en) | Device for relieving blockage of rotary air preheater by preheating heat storage element through hot air | |
| CN102818275A (en) | Optimization system for waste heat recovery of desulfurization island flue gas and operation of fans | |
| CN207943897U (en) | A kind of desulfurization wastewater Zero discharging system of the wide load denitration of cooperative achievement | |
| CN108469032B (en) | White smoke plume eliminating system and method based on smoke recycling technology | |
| CN209569711U (en) | A kind of coal-burning boiler of be rapidly heated heating and environmental protection | |
| CN206276240U (en) | Boiler at low load flue gas denitrification system | |
| CN207805390U (en) | A kind of station boiler denitrating system | |
| CN207279687U (en) | A kind of air preheater for including anti-blocking ash system | |
| CN202057204U (en) | Waste gas desulfuration and dust control device of carbon calcining furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111214 |
|
| CX01 | Expiry of patent term |